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jkummerow@chromium.org05ed9dd2012-01-23 14:42:48 +00001// Copyright 2012 the V8 project authors. All rights reserved.
ager@chromium.org5c838252010-02-19 08:53:10 +00002// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6// * Redistributions of source code must retain the above copyright
7// notice, this list of conditions and the following disclaimer.
8// * Redistributions in binary form must reproduce the above
9// copyright notice, this list of conditions and the following
10// disclaimer in the documentation and/or other materials provided
11// with the distribution.
12// * Neither the name of Google Inc. nor the names of its
13// contributors may be used to endorse or promote products derived
14// from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
karlklose@chromium.org83a47282011-05-11 11:54:09 +000028#include <limits.h> // For LONG_MIN, LONG_MAX.
ager@chromium.org5c838252010-02-19 08:53:10 +000029
30#include "v8.h"
31
jkummerow@chromium.org93a47f42013-07-02 14:43:41 +000032#if V8_TARGET_ARCH_MIPS
erik.corry@gmail.com9dfbea42010-05-21 12:58:28 +000033
ager@chromium.org5c838252010-02-19 08:53:10 +000034#include "bootstrapper.h"
karlklose@chromium.org83a47282011-05-11 11:54:09 +000035#include "codegen.h"
machenbach@chromium.orgc1789ee2013-07-05 07:09:57 +000036#include "cpu-profiler.h"
ager@chromium.org5c838252010-02-19 08:53:10 +000037#include "debug.h"
machenbach@chromium.orged29eb22013-10-31 13:30:00 +000038#include "isolate-inl.h"
ager@chromium.org5c838252010-02-19 08:53:10 +000039#include "runtime.h"
40
41namespace v8 {
42namespace internal {
43
karlklose@chromium.org83a47282011-05-11 11:54:09 +000044MacroAssembler::MacroAssembler(Isolate* arg_isolate, void* buffer, int size)
45 : Assembler(arg_isolate, buffer, size),
ager@chromium.org5c838252010-02-19 08:53:10 +000046 generating_stub_(false),
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +000047 has_frame_(false) {
karlklose@chromium.org83a47282011-05-11 11:54:09 +000048 if (isolate() != NULL) {
49 code_object_ = Handle<Object>(isolate()->heap()->undefined_value(),
50 isolate());
51 }
ager@chromium.org5c838252010-02-19 08:53:10 +000052}
53
54
machenbach@chromium.org935a7792013-11-12 09:05:18 +000055void MacroAssembler::Load(Register dst,
56 const MemOperand& src,
57 Representation r) {
58 ASSERT(!r.IsDouble());
59 if (r.IsInteger8()) {
60 lb(dst, src);
61 } else if (r.IsUInteger8()) {
62 lbu(dst, src);
63 } else if (r.IsInteger16()) {
64 lh(dst, src);
65 } else if (r.IsUInteger16()) {
66 lhu(dst, src);
67 } else {
68 lw(dst, src);
69 }
70}
71
72
73void MacroAssembler::Store(Register src,
74 const MemOperand& dst,
75 Representation r) {
76 ASSERT(!r.IsDouble());
77 if (r.IsInteger8() || r.IsUInteger8()) {
78 sb(src, dst);
79 } else if (r.IsInteger16() || r.IsUInteger16()) {
80 sh(src, dst);
81 } else {
82 sw(src, dst);
83 }
84}
85
86
ager@chromium.org5c838252010-02-19 08:53:10 +000087void MacroAssembler::LoadRoot(Register destination,
88 Heap::RootListIndex index) {
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +000089 lw(destination, MemOperand(s6, index << kPointerSizeLog2));
ager@chromium.org5c838252010-02-19 08:53:10 +000090}
91
lrn@chromium.org7516f052011-03-30 08:52:27 +000092
ager@chromium.org5c838252010-02-19 08:53:10 +000093void MacroAssembler::LoadRoot(Register destination,
94 Heap::RootListIndex index,
95 Condition cond,
96 Register src1, const Operand& src2) {
lrn@chromium.org7516f052011-03-30 08:52:27 +000097 Branch(2, NegateCondition(cond), src1, src2);
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +000098 lw(destination, MemOperand(s6, index << kPointerSizeLog2));
ager@chromium.org5c838252010-02-19 08:53:10 +000099}
100
101
lrn@chromium.org7516f052011-03-30 08:52:27 +0000102void MacroAssembler::StoreRoot(Register source,
103 Heap::RootListIndex index) {
104 sw(source, MemOperand(s6, index << kPointerSizeLog2));
105}
106
107
108void MacroAssembler::StoreRoot(Register source,
109 Heap::RootListIndex index,
110 Condition cond,
111 Register src1, const Operand& src2) {
112 Branch(2, NegateCondition(cond), src1, src2);
113 sw(source, MemOperand(s6, index << kPointerSizeLog2));
114}
115
116
danno@chromium.org40cb8782011-05-25 07:58:50 +0000117// Push and pop all registers that can hold pointers.
118void MacroAssembler::PushSafepointRegisters() {
119 // Safepoints expect a block of kNumSafepointRegisters values on the
120 // stack, so adjust the stack for unsaved registers.
121 const int num_unsaved = kNumSafepointRegisters - kNumSafepointSavedRegisters;
122 ASSERT(num_unsaved >= 0);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +0000123 if (num_unsaved > 0) {
124 Subu(sp, sp, Operand(num_unsaved * kPointerSize));
125 }
danno@chromium.org40cb8782011-05-25 07:58:50 +0000126 MultiPush(kSafepointSavedRegisters);
127}
128
erik.corry@gmail.comd6076d92011-06-06 09:39:18 +0000129
danno@chromium.org40cb8782011-05-25 07:58:50 +0000130void MacroAssembler::PopSafepointRegisters() {
131 const int num_unsaved = kNumSafepointRegisters - kNumSafepointSavedRegisters;
132 MultiPop(kSafepointSavedRegisters);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +0000133 if (num_unsaved > 0) {
134 Addu(sp, sp, Operand(num_unsaved * kPointerSize));
135 }
danno@chromium.org40cb8782011-05-25 07:58:50 +0000136}
137
erik.corry@gmail.comd6076d92011-06-06 09:39:18 +0000138
danno@chromium.org40cb8782011-05-25 07:58:50 +0000139void MacroAssembler::PushSafepointRegistersAndDoubles() {
140 PushSafepointRegisters();
jkummerow@chromium.org59297c72013-01-09 16:32:23 +0000141 Subu(sp, sp, Operand(FPURegister::NumAllocatableRegisters() * kDoubleSize));
142 for (int i = 0; i < FPURegister::NumAllocatableRegisters(); i+=2) {
danno@chromium.org40cb8782011-05-25 07:58:50 +0000143 FPURegister reg = FPURegister::FromAllocationIndex(i);
144 sdc1(reg, MemOperand(sp, i * kDoubleSize));
145 }
146}
147
erik.corry@gmail.comd6076d92011-06-06 09:39:18 +0000148
danno@chromium.org40cb8782011-05-25 07:58:50 +0000149void MacroAssembler::PopSafepointRegistersAndDoubles() {
jkummerow@chromium.org59297c72013-01-09 16:32:23 +0000150 for (int i = 0; i < FPURegister::NumAllocatableRegisters(); i+=2) {
danno@chromium.org40cb8782011-05-25 07:58:50 +0000151 FPURegister reg = FPURegister::FromAllocationIndex(i);
152 ldc1(reg, MemOperand(sp, i * kDoubleSize));
153 }
jkummerow@chromium.org59297c72013-01-09 16:32:23 +0000154 Addu(sp, sp, Operand(FPURegister::NumAllocatableRegisters() * kDoubleSize));
danno@chromium.org40cb8782011-05-25 07:58:50 +0000155 PopSafepointRegisters();
156}
157
erik.corry@gmail.comd6076d92011-06-06 09:39:18 +0000158
danno@chromium.org40cb8782011-05-25 07:58:50 +0000159void MacroAssembler::StoreToSafepointRegistersAndDoublesSlot(Register src,
160 Register dst) {
161 sw(src, SafepointRegistersAndDoublesSlot(dst));
162}
163
164
165void MacroAssembler::StoreToSafepointRegisterSlot(Register src, Register dst) {
166 sw(src, SafepointRegisterSlot(dst));
167}
168
169
170void MacroAssembler::LoadFromSafepointRegisterSlot(Register dst, Register src) {
171 lw(dst, SafepointRegisterSlot(src));
172}
173
174
175int MacroAssembler::SafepointRegisterStackIndex(int reg_code) {
176 // The registers are pushed starting with the highest encoding,
177 // which means that lowest encodings are closest to the stack pointer.
178 return kSafepointRegisterStackIndexMap[reg_code];
179}
180
181
182MemOperand MacroAssembler::SafepointRegisterSlot(Register reg) {
183 return MemOperand(sp, SafepointRegisterStackIndex(reg.code()) * kPointerSize);
184}
185
186
187MemOperand MacroAssembler::SafepointRegistersAndDoublesSlot(Register reg) {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +0000188 UNIMPLEMENTED_MIPS();
danno@chromium.org40cb8782011-05-25 07:58:50 +0000189 // General purpose registers are pushed last on the stack.
jkummerow@chromium.org59297c72013-01-09 16:32:23 +0000190 int doubles_size = FPURegister::NumAllocatableRegisters() * kDoubleSize;
danno@chromium.org40cb8782011-05-25 07:58:50 +0000191 int register_offset = SafepointRegisterStackIndex(reg.code()) * kPointerSize;
192 return MemOperand(sp, doubles_size + register_offset);
193}
194
195
lrn@chromium.org7516f052011-03-30 08:52:27 +0000196void MacroAssembler::InNewSpace(Register object,
197 Register scratch,
198 Condition cc,
199 Label* branch) {
200 ASSERT(cc == eq || cc == ne);
201 And(scratch, object, Operand(ExternalReference::new_space_mask(isolate())));
202 Branch(branch, cc, scratch,
203 Operand(ExternalReference::new_space_start(isolate())));
204}
205
206
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +0000207void MacroAssembler::RecordWriteField(
208 Register object,
209 int offset,
210 Register value,
211 Register dst,
212 RAStatus ra_status,
213 SaveFPRegsMode save_fp,
214 RememberedSetAction remembered_set_action,
215 SmiCheck smi_check) {
216 ASSERT(!AreAliased(value, dst, t8, object));
217 // First, check if a write barrier is even needed. The tests below
218 // catch stores of Smis.
lrn@chromium.org7516f052011-03-30 08:52:27 +0000219 Label done;
220
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +0000221 // Skip barrier if writing a smi.
222 if (smi_check == INLINE_SMI_CHECK) {
223 JumpIfSmi(value, &done);
224 }
lrn@chromium.org7516f052011-03-30 08:52:27 +0000225
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +0000226 // Although the object register is tagged, the offset is relative to the start
227 // of the object, so so offset must be a multiple of kPointerSize.
228 ASSERT(IsAligned(offset, kPointerSize));
lrn@chromium.org7516f052011-03-30 08:52:27 +0000229
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +0000230 Addu(dst, object, Operand(offset - kHeapObjectTag));
231 if (emit_debug_code()) {
232 Label ok;
233 And(t8, dst, Operand((1 << kPointerSizeLog2) - 1));
234 Branch(&ok, eq, t8, Operand(zero_reg));
235 stop("Unaligned cell in write barrier");
236 bind(&ok);
237 }
238
239 RecordWrite(object,
240 dst,
241 value,
242 ra_status,
243 save_fp,
244 remembered_set_action,
245 OMIT_SMI_CHECK);
lrn@chromium.org7516f052011-03-30 08:52:27 +0000246
247 bind(&done);
248
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +0000249 // Clobber clobbered input registers when running with the debug-code flag
lrn@chromium.org7516f052011-03-30 08:52:27 +0000250 // turned on to provoke errors.
karlklose@chromium.org83a47282011-05-11 11:54:09 +0000251 if (emit_debug_code()) {
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +0000252 li(value, Operand(BitCast<int32_t>(kZapValue + 4)));
253 li(dst, Operand(BitCast<int32_t>(kZapValue + 8)));
lrn@chromium.org7516f052011-03-30 08:52:27 +0000254 }
255}
256
257
258// Will clobber 4 registers: object, address, scratch, ip. The
259// register 'object' contains a heap object pointer. The heap object
260// tag is shifted away.
261void MacroAssembler::RecordWrite(Register object,
262 Register address,
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +0000263 Register value,
264 RAStatus ra_status,
265 SaveFPRegsMode fp_mode,
266 RememberedSetAction remembered_set_action,
267 SmiCheck smi_check) {
268 ASSERT(!AreAliased(object, address, value, t8));
269 ASSERT(!AreAliased(object, address, value, t9));
lrn@chromium.org7516f052011-03-30 08:52:27 +0000270
erik.corry@gmail.comf2038fb2012-01-16 11:42:08 +0000271 if (emit_debug_code()) {
272 lw(at, MemOperand(address));
273 Assert(
danno@chromium.org59400602013-08-13 17:09:37 +0000274 eq, kWrongAddressOrValuePassedToRecordWrite, at, Operand(value));
erik.corry@gmail.comf2038fb2012-01-16 11:42:08 +0000275 }
276
machenbach@chromium.orgf9841892013-11-25 12:01:13 +0000277 // Count number of write barriers in generated code.
278 isolate()->counters()->write_barriers_static()->Increment();
279 // TODO(mstarzinger): Dynamic counter missing.
280
281 // First, check if a write barrier is even needed. The tests below
282 // catch stores of smis and stores into the young generation.
lrn@chromium.org7516f052011-03-30 08:52:27 +0000283 Label done;
284
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +0000285 if (smi_check == INLINE_SMI_CHECK) {
286 ASSERT_EQ(0, kSmiTag);
jkummerow@chromium.orgc3b37122011-11-07 10:14:12 +0000287 JumpIfSmi(value, &done);
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +0000288 }
289
290 CheckPageFlag(value,
291 value, // Used as scratch.
292 MemoryChunk::kPointersToHereAreInterestingMask,
293 eq,
294 &done);
295 CheckPageFlag(object,
296 value, // Used as scratch.
297 MemoryChunk::kPointersFromHereAreInterestingMask,
298 eq,
299 &done);
lrn@chromium.org7516f052011-03-30 08:52:27 +0000300
301 // Record the actual write.
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +0000302 if (ra_status == kRAHasNotBeenSaved) {
303 push(ra);
304 }
305 RecordWriteStub stub(object, value, address, remembered_set_action, fp_mode);
306 CallStub(&stub);
307 if (ra_status == kRAHasNotBeenSaved) {
308 pop(ra);
309 }
lrn@chromium.org7516f052011-03-30 08:52:27 +0000310
311 bind(&done);
312
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +0000313 // Clobber clobbered registers when running with the debug-code flag
lrn@chromium.org7516f052011-03-30 08:52:27 +0000314 // turned on to provoke errors.
karlklose@chromium.org83a47282011-05-11 11:54:09 +0000315 if (emit_debug_code()) {
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +0000316 li(address, Operand(BitCast<int32_t>(kZapValue + 12)));
317 li(value, Operand(BitCast<int32_t>(kZapValue + 16)));
318 }
319}
320
321
322void MacroAssembler::RememberedSetHelper(Register object, // For debug tests.
323 Register address,
324 Register scratch,
325 SaveFPRegsMode fp_mode,
326 RememberedSetFinalAction and_then) {
327 Label done;
erik.corry@gmail.comf2038fb2012-01-16 11:42:08 +0000328 if (emit_debug_code()) {
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +0000329 Label ok;
330 JumpIfNotInNewSpace(object, scratch, &ok);
331 stop("Remembered set pointer is in new space");
332 bind(&ok);
333 }
334 // Load store buffer top.
335 ExternalReference store_buffer =
336 ExternalReference::store_buffer_top(isolate());
337 li(t8, Operand(store_buffer));
338 lw(scratch, MemOperand(t8));
339 // Store pointer to buffer and increment buffer top.
340 sw(address, MemOperand(scratch));
341 Addu(scratch, scratch, kPointerSize);
342 // Write back new top of buffer.
343 sw(scratch, MemOperand(t8));
344 // Call stub on end of buffer.
345 // Check for end of buffer.
346 And(t8, scratch, Operand(StoreBuffer::kStoreBufferOverflowBit));
347 if (and_then == kFallThroughAtEnd) {
348 Branch(&done, eq, t8, Operand(zero_reg));
349 } else {
350 ASSERT(and_then == kReturnAtEnd);
351 Ret(eq, t8, Operand(zero_reg));
352 }
353 push(ra);
354 StoreBufferOverflowStub store_buffer_overflow =
355 StoreBufferOverflowStub(fp_mode);
356 CallStub(&store_buffer_overflow);
357 pop(ra);
358 bind(&done);
359 if (and_then == kReturnAtEnd) {
360 Ret();
lrn@chromium.org7516f052011-03-30 08:52:27 +0000361 }
362}
363
364
365// -----------------------------------------------------------------------------
karlklose@chromium.org83a47282011-05-11 11:54:09 +0000366// Allocation support.
lrn@chromium.org7516f052011-03-30 08:52:27 +0000367
368
369void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg,
370 Register scratch,
371 Label* miss) {
372 Label same_contexts;
373
374 ASSERT(!holder_reg.is(scratch));
375 ASSERT(!holder_reg.is(at));
376 ASSERT(!scratch.is(at));
377
378 // Load current lexical context from the stack frame.
379 lw(scratch, MemOperand(fp, StandardFrameConstants::kContextOffset));
380 // In debug mode, make sure the lexical context is set.
381#ifdef DEBUG
danno@chromium.org59400602013-08-13 17:09:37 +0000382 Check(ne, kWeShouldNotHaveAnEmptyLexicalContext,
lrn@chromium.org7516f052011-03-30 08:52:27 +0000383 scratch, Operand(zero_reg));
384#endif
385
yangguo@chromium.org46839fb2012-08-28 09:06:19 +0000386 // Load the native context of the current context.
387 int offset =
388 Context::kHeaderSize + Context::GLOBAL_OBJECT_INDEX * kPointerSize;
lrn@chromium.org7516f052011-03-30 08:52:27 +0000389 lw(scratch, FieldMemOperand(scratch, offset));
yangguo@chromium.org46839fb2012-08-28 09:06:19 +0000390 lw(scratch, FieldMemOperand(scratch, GlobalObject::kNativeContextOffset));
lrn@chromium.org7516f052011-03-30 08:52:27 +0000391
yangguo@chromium.org46839fb2012-08-28 09:06:19 +0000392 // Check the context is a native context.
karlklose@chromium.org83a47282011-05-11 11:54:09 +0000393 if (emit_debug_code()) {
karlklose@chromium.org83a47282011-05-11 11:54:09 +0000394 push(holder_reg); // Temporarily save holder on the stack.
yangguo@chromium.org46839fb2012-08-28 09:06:19 +0000395 // Read the first word and compare to the native_context_map.
lrn@chromium.org7516f052011-03-30 08:52:27 +0000396 lw(holder_reg, FieldMemOperand(scratch, HeapObject::kMapOffset));
yangguo@chromium.org46839fb2012-08-28 09:06:19 +0000397 LoadRoot(at, Heap::kNativeContextMapRootIndex);
danno@chromium.org59400602013-08-13 17:09:37 +0000398 Check(eq, kJSGlobalObjectNativeContextShouldBeANativeContext,
lrn@chromium.org7516f052011-03-30 08:52:27 +0000399 holder_reg, Operand(at));
karlklose@chromium.org83a47282011-05-11 11:54:09 +0000400 pop(holder_reg); // Restore holder.
lrn@chromium.org7516f052011-03-30 08:52:27 +0000401 }
402
403 // Check if both contexts are the same.
yangguo@chromium.org46839fb2012-08-28 09:06:19 +0000404 lw(at, FieldMemOperand(holder_reg, JSGlobalProxy::kNativeContextOffset));
lrn@chromium.org7516f052011-03-30 08:52:27 +0000405 Branch(&same_contexts, eq, scratch, Operand(at));
406
yangguo@chromium.org46839fb2012-08-28 09:06:19 +0000407 // Check the context is a native context.
karlklose@chromium.org83a47282011-05-11 11:54:09 +0000408 if (emit_debug_code()) {
karlklose@chromium.org83a47282011-05-11 11:54:09 +0000409 push(holder_reg); // Temporarily save holder on the stack.
lrn@chromium.org7516f052011-03-30 08:52:27 +0000410 mov(holder_reg, at); // Move at to its holding place.
411 LoadRoot(at, Heap::kNullValueRootIndex);
danno@chromium.org59400602013-08-13 17:09:37 +0000412 Check(ne, kJSGlobalProxyContextShouldNotBeNull,
lrn@chromium.org7516f052011-03-30 08:52:27 +0000413 holder_reg, Operand(at));
414
415 lw(holder_reg, FieldMemOperand(holder_reg, HeapObject::kMapOffset));
yangguo@chromium.org46839fb2012-08-28 09:06:19 +0000416 LoadRoot(at, Heap::kNativeContextMapRootIndex);
danno@chromium.org59400602013-08-13 17:09:37 +0000417 Check(eq, kJSGlobalObjectNativeContextShouldBeANativeContext,
lrn@chromium.org7516f052011-03-30 08:52:27 +0000418 holder_reg, Operand(at));
419 // Restore at is not needed. at is reloaded below.
karlklose@chromium.org83a47282011-05-11 11:54:09 +0000420 pop(holder_reg); // Restore holder.
lrn@chromium.org7516f052011-03-30 08:52:27 +0000421 // Restore at to holder's context.
yangguo@chromium.org46839fb2012-08-28 09:06:19 +0000422 lw(at, FieldMemOperand(holder_reg, JSGlobalProxy::kNativeContextOffset));
lrn@chromium.org7516f052011-03-30 08:52:27 +0000423 }
424
425 // Check that the security token in the calling global object is
426 // compatible with the security token in the receiving global
427 // object.
428 int token_offset = Context::kHeaderSize +
429 Context::SECURITY_TOKEN_INDEX * kPointerSize;
430
431 lw(scratch, FieldMemOperand(scratch, token_offset));
432 lw(at, FieldMemOperand(at, token_offset));
433 Branch(miss, ne, scratch, Operand(at));
434
435 bind(&same_contexts);
ager@chromium.org5c838252010-02-19 08:53:10 +0000436}
437
438
erik.corry@gmail.comf2038fb2012-01-16 11:42:08 +0000439void MacroAssembler::GetNumberHash(Register reg0, Register scratch) {
440 // First of all we assign the hash seed to scratch.
441 LoadRoot(scratch, Heap::kHashSeedRootIndex);
442 SmiUntag(scratch);
443
444 // Xor original key with a seed.
445 xor_(reg0, reg0, scratch);
446
447 // Compute the hash code from the untagged key. This must be kept in sync
448 // with ComputeIntegerHash in utils.h.
449 //
450 // hash = ~hash + (hash << 15);
451 nor(scratch, reg0, zero_reg);
452 sll(at, reg0, 15);
453 addu(reg0, scratch, at);
454
455 // hash = hash ^ (hash >> 12);
456 srl(at, reg0, 12);
457 xor_(reg0, reg0, at);
458
459 // hash = hash + (hash << 2);
460 sll(at, reg0, 2);
461 addu(reg0, reg0, at);
462
463 // hash = hash ^ (hash >> 4);
464 srl(at, reg0, 4);
465 xor_(reg0, reg0, at);
466
467 // hash = hash * 2057;
ulan@chromium.org2efb9002012-01-19 15:36:35 +0000468 sll(scratch, reg0, 11);
469 sll(at, reg0, 3);
470 addu(reg0, reg0, at);
471 addu(reg0, reg0, scratch);
erik.corry@gmail.comf2038fb2012-01-16 11:42:08 +0000472
473 // hash = hash ^ (hash >> 16);
474 srl(at, reg0, 16);
475 xor_(reg0, reg0, at);
476}
477
478
sgjesse@chromium.org6db88712011-07-11 11:41:22 +0000479void MacroAssembler::LoadFromNumberDictionary(Label* miss,
480 Register elements,
481 Register key,
482 Register result,
483 Register reg0,
484 Register reg1,
485 Register reg2) {
486 // Register use:
487 //
488 // elements - holds the slow-case elements of the receiver on entry.
489 // Unchanged unless 'result' is the same register.
490 //
491 // key - holds the smi key on entry.
492 // Unchanged unless 'result' is the same register.
493 //
494 //
495 // result - holds the result on exit if the load succeeded.
496 // Allowed to be the same as 'key' or 'result'.
497 // Unchanged on bailout so 'key' or 'result' can be used
498 // in further computation.
499 //
500 // Scratch registers:
501 //
502 // reg0 - holds the untagged key on entry and holds the hash once computed.
503 //
504 // reg1 - Used to hold the capacity mask of the dictionary.
505 //
506 // reg2 - Used for the index into the dictionary.
507 // at - Temporary (avoid MacroAssembler instructions also using 'at').
508 Label done;
509
erik.corry@gmail.comf2038fb2012-01-16 11:42:08 +0000510 GetNumberHash(reg0, reg1);
sgjesse@chromium.org6db88712011-07-11 11:41:22 +0000511
512 // Compute the capacity mask.
erik.corry@gmail.comf2038fb2012-01-16 11:42:08 +0000513 lw(reg1, FieldMemOperand(elements, SeededNumberDictionary::kCapacityOffset));
sgjesse@chromium.org6db88712011-07-11 11:41:22 +0000514 sra(reg1, reg1, kSmiTagSize);
515 Subu(reg1, reg1, Operand(1));
516
517 // Generate an unrolled loop that performs a few probes before giving up.
machenbach@chromium.orgea468882013-11-18 08:53:19 +0000518 for (int i = 0; i < kNumberDictionaryProbes; i++) {
sgjesse@chromium.org6db88712011-07-11 11:41:22 +0000519 // Use reg2 for index calculations and keep the hash intact in reg0.
520 mov(reg2, reg0);
521 // Compute the masked index: (hash + i + i * i) & mask.
522 if (i > 0) {
erik.corry@gmail.comf2038fb2012-01-16 11:42:08 +0000523 Addu(reg2, reg2, Operand(SeededNumberDictionary::GetProbeOffset(i)));
sgjesse@chromium.org6db88712011-07-11 11:41:22 +0000524 }
525 and_(reg2, reg2, reg1);
526
527 // Scale the index by multiplying by the element size.
erik.corry@gmail.comf2038fb2012-01-16 11:42:08 +0000528 ASSERT(SeededNumberDictionary::kEntrySize == 3);
sgjesse@chromium.org6db88712011-07-11 11:41:22 +0000529 sll(at, reg2, 1); // 2x.
530 addu(reg2, reg2, at); // reg2 = reg2 * 3.
531
532 // Check if the key is identical to the name.
533 sll(at, reg2, kPointerSizeLog2);
534 addu(reg2, elements, at);
535
erik.corry@gmail.comf2038fb2012-01-16 11:42:08 +0000536 lw(at, FieldMemOperand(reg2, SeededNumberDictionary::kElementsStartOffset));
machenbach@chromium.orgea468882013-11-18 08:53:19 +0000537 if (i != kNumberDictionaryProbes - 1) {
sgjesse@chromium.org6db88712011-07-11 11:41:22 +0000538 Branch(&done, eq, key, Operand(at));
539 } else {
540 Branch(miss, ne, key, Operand(at));
541 }
542 }
543
544 bind(&done);
545 // Check that the value is a normal property.
546 // reg2: elements + (index * kPointerSize).
547 const int kDetailsOffset =
erik.corry@gmail.comf2038fb2012-01-16 11:42:08 +0000548 SeededNumberDictionary::kElementsStartOffset + 2 * kPointerSize;
sgjesse@chromium.org6db88712011-07-11 11:41:22 +0000549 lw(reg1, FieldMemOperand(reg2, kDetailsOffset));
kmillikin@chromium.org83e16822011-09-13 08:21:47 +0000550 And(at, reg1, Operand(Smi::FromInt(PropertyDetails::TypeField::kMask)));
sgjesse@chromium.org6db88712011-07-11 11:41:22 +0000551 Branch(miss, ne, at, Operand(zero_reg));
552
553 // Get the value at the masked, scaled index and return.
554 const int kValueOffset =
erik.corry@gmail.comf2038fb2012-01-16 11:42:08 +0000555 SeededNumberDictionary::kElementsStartOffset + kPointerSize;
sgjesse@chromium.org6db88712011-07-11 11:41:22 +0000556 lw(result, FieldMemOperand(reg2, kValueOffset));
557}
558
559
ager@chromium.org5c838252010-02-19 08:53:10 +0000560// ---------------------------------------------------------------------------
karlklose@chromium.org83a47282011-05-11 11:54:09 +0000561// Instruction macros.
ager@chromium.org5c838252010-02-19 08:53:10 +0000562
ager@chromium.org5c838252010-02-19 08:53:10 +0000563void MacroAssembler::Addu(Register rd, Register rs, const Operand& rt) {
564 if (rt.is_reg()) {
565 addu(rd, rs, rt.rm());
566 } else {
lrn@chromium.org7516f052011-03-30 08:52:27 +0000567 if (is_int16(rt.imm32_) && !MustUseReg(rt.rmode_)) {
ager@chromium.org5c838252010-02-19 08:53:10 +0000568 addiu(rd, rs, rt.imm32_);
569 } else {
570 // li handles the relocation.
571 ASSERT(!rs.is(at));
572 li(at, rt);
573 addu(rd, rs, at);
574 }
575 }
576}
577
578
lrn@chromium.org7516f052011-03-30 08:52:27 +0000579void MacroAssembler::Subu(Register rd, Register rs, const Operand& rt) {
580 if (rt.is_reg()) {
581 subu(rd, rs, rt.rm());
582 } else {
583 if (is_int16(rt.imm32_) && !MustUseReg(rt.rmode_)) {
584 addiu(rd, rs, -rt.imm32_); // No subiu instr, use addiu(x, y, -imm).
585 } else {
586 // li handles the relocation.
587 ASSERT(!rs.is(at));
588 li(at, rt);
589 subu(rd, rs, at);
590 }
591 }
592}
593
594
ager@chromium.org5c838252010-02-19 08:53:10 +0000595void MacroAssembler::Mul(Register rd, Register rs, const Operand& rt) {
596 if (rt.is_reg()) {
mstarzinger@chromium.org3233d2f2012-03-14 11:16:03 +0000597 if (kArchVariant == kLoongson) {
598 mult(rs, rt.rm());
599 mflo(rd);
600 } else {
601 mul(rd, rs, rt.rm());
602 }
ager@chromium.org5c838252010-02-19 08:53:10 +0000603 } else {
604 // li handles the relocation.
605 ASSERT(!rs.is(at));
606 li(at, rt);
mstarzinger@chromium.org3233d2f2012-03-14 11:16:03 +0000607 if (kArchVariant == kLoongson) {
608 mult(rs, at);
609 mflo(rd);
610 } else {
611 mul(rd, rs, at);
612 }
ager@chromium.org5c838252010-02-19 08:53:10 +0000613 }
614}
615
616
617void MacroAssembler::Mult(Register rs, const Operand& rt) {
618 if (rt.is_reg()) {
619 mult(rs, rt.rm());
620 } else {
621 // li handles the relocation.
622 ASSERT(!rs.is(at));
623 li(at, rt);
624 mult(rs, at);
625 }
626}
627
628
629void MacroAssembler::Multu(Register rs, const Operand& rt) {
630 if (rt.is_reg()) {
631 multu(rs, rt.rm());
632 } else {
633 // li handles the relocation.
634 ASSERT(!rs.is(at));
635 li(at, rt);
636 multu(rs, at);
637 }
638}
639
640
641void MacroAssembler::Div(Register rs, const Operand& rt) {
642 if (rt.is_reg()) {
643 div(rs, rt.rm());
644 } else {
645 // li handles the relocation.
646 ASSERT(!rs.is(at));
647 li(at, rt);
648 div(rs, at);
649 }
650}
651
652
653void MacroAssembler::Divu(Register rs, const Operand& rt) {
654 if (rt.is_reg()) {
655 divu(rs, rt.rm());
656 } else {
657 // li handles the relocation.
658 ASSERT(!rs.is(at));
659 li(at, rt);
660 divu(rs, at);
661 }
662}
663
664
665void MacroAssembler::And(Register rd, Register rs, const Operand& rt) {
666 if (rt.is_reg()) {
667 and_(rd, rs, rt.rm());
668 } else {
lrn@chromium.org7516f052011-03-30 08:52:27 +0000669 if (is_uint16(rt.imm32_) && !MustUseReg(rt.rmode_)) {
ager@chromium.org5c838252010-02-19 08:53:10 +0000670 andi(rd, rs, rt.imm32_);
671 } else {
672 // li handles the relocation.
673 ASSERT(!rs.is(at));
674 li(at, rt);
675 and_(rd, rs, at);
676 }
677 }
678}
679
680
681void MacroAssembler::Or(Register rd, Register rs, const Operand& rt) {
682 if (rt.is_reg()) {
683 or_(rd, rs, rt.rm());
684 } else {
lrn@chromium.org7516f052011-03-30 08:52:27 +0000685 if (is_uint16(rt.imm32_) && !MustUseReg(rt.rmode_)) {
ager@chromium.org5c838252010-02-19 08:53:10 +0000686 ori(rd, rs, rt.imm32_);
687 } else {
688 // li handles the relocation.
689 ASSERT(!rs.is(at));
690 li(at, rt);
691 or_(rd, rs, at);
692 }
693 }
694}
695
696
697void MacroAssembler::Xor(Register rd, Register rs, const Operand& rt) {
698 if (rt.is_reg()) {
699 xor_(rd, rs, rt.rm());
700 } else {
lrn@chromium.org7516f052011-03-30 08:52:27 +0000701 if (is_uint16(rt.imm32_) && !MustUseReg(rt.rmode_)) {
ager@chromium.org5c838252010-02-19 08:53:10 +0000702 xori(rd, rs, rt.imm32_);
703 } else {
704 // li handles the relocation.
705 ASSERT(!rs.is(at));
706 li(at, rt);
707 xor_(rd, rs, at);
708 }
709 }
710}
711
712
713void MacroAssembler::Nor(Register rd, Register rs, const Operand& rt) {
714 if (rt.is_reg()) {
715 nor(rd, rs, rt.rm());
716 } else {
717 // li handles the relocation.
718 ASSERT(!rs.is(at));
719 li(at, rt);
720 nor(rd, rs, at);
721 }
722}
723
724
karlklose@chromium.org83a47282011-05-11 11:54:09 +0000725void MacroAssembler::Neg(Register rs, const Operand& rt) {
726 ASSERT(rt.is_reg());
727 ASSERT(!at.is(rs));
728 ASSERT(!at.is(rt.rm()));
729 li(at, -1);
730 xor_(rs, rt.rm(), at);
731}
732
733
ager@chromium.org5c838252010-02-19 08:53:10 +0000734void MacroAssembler::Slt(Register rd, Register rs, const Operand& rt) {
735 if (rt.is_reg()) {
736 slt(rd, rs, rt.rm());
737 } else {
lrn@chromium.org7516f052011-03-30 08:52:27 +0000738 if (is_int16(rt.imm32_) && !MustUseReg(rt.rmode_)) {
ager@chromium.org5c838252010-02-19 08:53:10 +0000739 slti(rd, rs, rt.imm32_);
740 } else {
741 // li handles the relocation.
742 ASSERT(!rs.is(at));
743 li(at, rt);
744 slt(rd, rs, at);
745 }
746 }
747}
748
749
750void MacroAssembler::Sltu(Register rd, Register rs, const Operand& rt) {
751 if (rt.is_reg()) {
752 sltu(rd, rs, rt.rm());
753 } else {
lrn@chromium.org7516f052011-03-30 08:52:27 +0000754 if (is_uint16(rt.imm32_) && !MustUseReg(rt.rmode_)) {
ager@chromium.org5c838252010-02-19 08:53:10 +0000755 sltiu(rd, rs, rt.imm32_);
756 } else {
757 // li handles the relocation.
758 ASSERT(!rs.is(at));
759 li(at, rt);
760 sltu(rd, rs, at);
761 }
762 }
763}
764
765
lrn@chromium.org7516f052011-03-30 08:52:27 +0000766void MacroAssembler::Ror(Register rd, Register rs, const Operand& rt) {
mstarzinger@chromium.org3233d2f2012-03-14 11:16:03 +0000767 if (kArchVariant == kMips32r2) {
lrn@chromium.org7516f052011-03-30 08:52:27 +0000768 if (rt.is_reg()) {
769 rotrv(rd, rs, rt.rm());
770 } else {
771 rotr(rd, rs, rt.imm32_);
772 }
773 } else {
774 if (rt.is_reg()) {
775 subu(at, zero_reg, rt.rm());
776 sllv(at, rs, at);
777 srlv(rd, rs, rt.rm());
778 or_(rd, rd, at);
779 } else {
780 if (rt.imm32_ == 0) {
781 srl(rd, rs, 0);
782 } else {
783 srl(at, rs, rt.imm32_);
784 sll(rd, rs, (0x20 - rt.imm32_) & 0x1f);
785 or_(rd, rd, at);
786 }
787 }
788 }
ager@chromium.org5c838252010-02-19 08:53:10 +0000789}
790
mstarzinger@chromium.orge0e1b0d2013-07-08 08:38:06 +0000791
machenbach@chromium.orgafbdadc2013-12-09 16:12:18 +0000792void MacroAssembler::Pref(int32_t hint, const MemOperand& rs) {
793 if (kArchVariant == kLoongson) {
794 lw(zero_reg, rs);
795 } else {
796 pref(hint, rs);
797 }
798}
799
800
lrn@chromium.org7516f052011-03-30 08:52:27 +0000801//------------Pseudo-instructions-------------
802
machenbach@chromium.orgafbdadc2013-12-09 16:12:18 +0000803void MacroAssembler::Ulw(Register rd, const MemOperand& rs) {
804 lwr(rd, rs);
805 lwl(rd, MemOperand(rs.rm(), rs.offset() + 3));
806}
807
808
809void MacroAssembler::Usw(Register rd, const MemOperand& rs) {
810 swr(rd, rs);
811 swl(rd, MemOperand(rs.rm(), rs.offset() + 3));
812}
813
814
verwaest@chromium.org057bd502013-11-06 12:03:29 +0000815void MacroAssembler::li(Register dst, Handle<Object> value, LiFlags mode) {
816 AllowDeferredHandleDereference smi_check;
817 if (value->IsSmi()) {
818 li(dst, Operand(value), mode);
819 } else {
820 ASSERT(value->IsHeapObject());
821 if (isolate()->heap()->InNewSpace(*value)) {
822 Handle<Cell> cell = isolate()->factory()->NewCell(value);
823 li(dst, Operand(cell));
824 lw(dst, FieldMemOperand(dst, Cell::kValueOffset));
825 } else {
826 li(dst, Operand(value));
827 }
828 }
829}
830
831
danno@chromium.org88aa0582012-03-23 15:11:57 +0000832void MacroAssembler::li(Register rd, Operand j, LiFlags mode) {
ager@chromium.org5c838252010-02-19 08:53:10 +0000833 ASSERT(!j.is_reg());
lrn@chromium.org7516f052011-03-30 08:52:27 +0000834 BlockTrampolinePoolScope block_trampoline_pool(this);
danno@chromium.org88aa0582012-03-23 15:11:57 +0000835 if (!MustUseReg(j.rmode_) && mode == OPTIMIZE_SIZE) {
ager@chromium.org5c838252010-02-19 08:53:10 +0000836 // Normal load of an immediate value which does not need Relocation Info.
837 if (is_int16(j.imm32_)) {
838 addiu(rd, zero_reg, j.imm32_);
lrn@chromium.org7516f052011-03-30 08:52:27 +0000839 } else if (!(j.imm32_ & kHiMask)) {
ager@chromium.org5c838252010-02-19 08:53:10 +0000840 ori(rd, zero_reg, j.imm32_);
lrn@chromium.org7516f052011-03-30 08:52:27 +0000841 } else if (!(j.imm32_ & kImm16Mask)) {
yangguo@chromium.org78d1ad42012-02-09 13:53:47 +0000842 lui(rd, (j.imm32_ >> kLuiShift) & kImm16Mask);
ager@chromium.org5c838252010-02-19 08:53:10 +0000843 } else {
yangguo@chromium.org78d1ad42012-02-09 13:53:47 +0000844 lui(rd, (j.imm32_ >> kLuiShift) & kImm16Mask);
lrn@chromium.org7516f052011-03-30 08:52:27 +0000845 ori(rd, rd, (j.imm32_ & kImm16Mask));
ager@chromium.org5c838252010-02-19 08:53:10 +0000846 }
danno@chromium.org88aa0582012-03-23 15:11:57 +0000847 } else {
lrn@chromium.org7516f052011-03-30 08:52:27 +0000848 if (MustUseReg(j.rmode_)) {
ager@chromium.org5c838252010-02-19 08:53:10 +0000849 RecordRelocInfo(j.rmode_, j.imm32_);
850 }
yangguo@chromium.org78d1ad42012-02-09 13:53:47 +0000851 // We always need the same number of instructions as we may need to patch
ager@chromium.org5c838252010-02-19 08:53:10 +0000852 // this code to load another value which may need 2 instructions to load.
yangguo@chromium.org78d1ad42012-02-09 13:53:47 +0000853 lui(rd, (j.imm32_ >> kLuiShift) & kImm16Mask);
karlklose@chromium.org83a47282011-05-11 11:54:09 +0000854 ori(rd, rd, (j.imm32_ & kImm16Mask));
ager@chromium.org5c838252010-02-19 08:53:10 +0000855 }
856}
857
858
ager@chromium.org5c838252010-02-19 08:53:10 +0000859void MacroAssembler::MultiPush(RegList regs) {
fschneider@chromium.org1805e212011-09-05 10:49:12 +0000860 int16_t num_to_push = NumberOfBitsSet(regs);
861 int16_t stack_offset = num_to_push * kPointerSize;
ager@chromium.org5c838252010-02-19 08:53:10 +0000862
fschneider@chromium.org1805e212011-09-05 10:49:12 +0000863 Subu(sp, sp, Operand(stack_offset));
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +0000864 for (int16_t i = kNumRegisters - 1; i >= 0; i--) {
ager@chromium.org5c838252010-02-19 08:53:10 +0000865 if ((regs & (1 << i)) != 0) {
fschneider@chromium.org1805e212011-09-05 10:49:12 +0000866 stack_offset -= kPointerSize;
867 sw(ToRegister(i), MemOperand(sp, stack_offset));
ager@chromium.org5c838252010-02-19 08:53:10 +0000868 }
869 }
870}
871
872
873void MacroAssembler::MultiPushReversed(RegList regs) {
fschneider@chromium.org1805e212011-09-05 10:49:12 +0000874 int16_t num_to_push = NumberOfBitsSet(regs);
875 int16_t stack_offset = num_to_push * kPointerSize;
ager@chromium.org5c838252010-02-19 08:53:10 +0000876
fschneider@chromium.org1805e212011-09-05 10:49:12 +0000877 Subu(sp, sp, Operand(stack_offset));
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +0000878 for (int16_t i = 0; i < kNumRegisters; i++) {
ager@chromium.org5c838252010-02-19 08:53:10 +0000879 if ((regs & (1 << i)) != 0) {
fschneider@chromium.org1805e212011-09-05 10:49:12 +0000880 stack_offset -= kPointerSize;
881 sw(ToRegister(i), MemOperand(sp, stack_offset));
ager@chromium.org5c838252010-02-19 08:53:10 +0000882 }
883 }
884}
885
886
887void MacroAssembler::MultiPop(RegList regs) {
fschneider@chromium.org1805e212011-09-05 10:49:12 +0000888 int16_t stack_offset = 0;
ager@chromium.org5c838252010-02-19 08:53:10 +0000889
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +0000890 for (int16_t i = 0; i < kNumRegisters; i++) {
ager@chromium.org5c838252010-02-19 08:53:10 +0000891 if ((regs & (1 << i)) != 0) {
fschneider@chromium.org1805e212011-09-05 10:49:12 +0000892 lw(ToRegister(i), MemOperand(sp, stack_offset));
893 stack_offset += kPointerSize;
ager@chromium.org5c838252010-02-19 08:53:10 +0000894 }
895 }
fschneider@chromium.org1805e212011-09-05 10:49:12 +0000896 addiu(sp, sp, stack_offset);
ager@chromium.org5c838252010-02-19 08:53:10 +0000897}
898
899
900void MacroAssembler::MultiPopReversed(RegList regs) {
fschneider@chromium.org1805e212011-09-05 10:49:12 +0000901 int16_t stack_offset = 0;
ager@chromium.org5c838252010-02-19 08:53:10 +0000902
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +0000903 for (int16_t i = kNumRegisters - 1; i >= 0; i--) {
ager@chromium.org5c838252010-02-19 08:53:10 +0000904 if ((regs & (1 << i)) != 0) {
fschneider@chromium.org1805e212011-09-05 10:49:12 +0000905 lw(ToRegister(i), MemOperand(sp, stack_offset));
906 stack_offset += kPointerSize;
ager@chromium.org5c838252010-02-19 08:53:10 +0000907 }
908 }
fschneider@chromium.org1805e212011-09-05 10:49:12 +0000909 addiu(sp, sp, stack_offset);
910}
911
912
913void MacroAssembler::MultiPushFPU(RegList regs) {
fschneider@chromium.org1805e212011-09-05 10:49:12 +0000914 int16_t num_to_push = NumberOfBitsSet(regs);
915 int16_t stack_offset = num_to_push * kDoubleSize;
916
917 Subu(sp, sp, Operand(stack_offset));
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +0000918 for (int16_t i = kNumRegisters - 1; i >= 0; i--) {
fschneider@chromium.org1805e212011-09-05 10:49:12 +0000919 if ((regs & (1 << i)) != 0) {
920 stack_offset -= kDoubleSize;
921 sdc1(FPURegister::from_code(i), MemOperand(sp, stack_offset));
922 }
923 }
924}
925
926
927void MacroAssembler::MultiPushReversedFPU(RegList regs) {
fschneider@chromium.org1805e212011-09-05 10:49:12 +0000928 int16_t num_to_push = NumberOfBitsSet(regs);
929 int16_t stack_offset = num_to_push * kDoubleSize;
930
931 Subu(sp, sp, Operand(stack_offset));
932 for (int16_t i = 0; i < kNumRegisters; i++) {
933 if ((regs & (1 << i)) != 0) {
934 stack_offset -= kDoubleSize;
935 sdc1(FPURegister::from_code(i), MemOperand(sp, stack_offset));
936 }
937 }
938}
939
940
941void MacroAssembler::MultiPopFPU(RegList regs) {
fschneider@chromium.org1805e212011-09-05 10:49:12 +0000942 int16_t stack_offset = 0;
943
944 for (int16_t i = 0; i < kNumRegisters; i++) {
945 if ((regs & (1 << i)) != 0) {
946 ldc1(FPURegister::from_code(i), MemOperand(sp, stack_offset));
947 stack_offset += kDoubleSize;
948 }
949 }
950 addiu(sp, sp, stack_offset);
951}
952
953
954void MacroAssembler::MultiPopReversedFPU(RegList regs) {
fschneider@chromium.org1805e212011-09-05 10:49:12 +0000955 int16_t stack_offset = 0;
956
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +0000957 for (int16_t i = kNumRegisters - 1; i >= 0; i--) {
fschneider@chromium.org1805e212011-09-05 10:49:12 +0000958 if ((regs & (1 << i)) != 0) {
959 ldc1(FPURegister::from_code(i), MemOperand(sp, stack_offset));
960 stack_offset += kDoubleSize;
961 }
962 }
963 addiu(sp, sp, stack_offset);
ager@chromium.org5c838252010-02-19 08:53:10 +0000964}
965
966
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +0000967void MacroAssembler::FlushICache(Register address, unsigned instructions) {
968 RegList saved_regs = kJSCallerSaved | ra.bit();
969 MultiPush(saved_regs);
970 AllowExternalCallThatCantCauseGC scope(this);
971
972 // Save to a0 in case address == t0.
973 Move(a0, address);
974 PrepareCallCFunction(2, t0);
975
976 li(a1, instructions * kInstrSize);
977 CallCFunction(ExternalReference::flush_icache_function(isolate()), 2);
978 MultiPop(saved_regs);
979}
980
981
lrn@chromium.org7516f052011-03-30 08:52:27 +0000982void MacroAssembler::Ext(Register rt,
983 Register rs,
984 uint16_t pos,
985 uint16_t size) {
986 ASSERT(pos < 32);
ricow@chromium.org4668a2c2011-08-29 10:41:00 +0000987 ASSERT(pos + size < 33);
ager@chromium.org5c838252010-02-19 08:53:10 +0000988
mstarzinger@chromium.org3233d2f2012-03-14 11:16:03 +0000989 if (kArchVariant == kMips32r2) {
lrn@chromium.org7516f052011-03-30 08:52:27 +0000990 ext_(rt, rs, pos, size);
991 } else {
992 // Move rs to rt and shift it left then right to get the
993 // desired bitfield on the right side and zeroes on the left.
ricow@chromium.org4668a2c2011-08-29 10:41:00 +0000994 int shift_left = 32 - (pos + size);
995 sll(rt, rs, shift_left); // Acts as a move if shift_left == 0.
996
997 int shift_right = 32 - size;
998 if (shift_right > 0) {
999 srl(rt, rt, shift_right);
1000 }
lrn@chromium.org7516f052011-03-30 08:52:27 +00001001 }
1002}
1003
1004
1005void MacroAssembler::Ins(Register rt,
1006 Register rs,
1007 uint16_t pos,
1008 uint16_t size) {
1009 ASSERT(pos < 32);
erikcorry0ad885c2011-11-21 13:51:57 +00001010 ASSERT(pos + size <= 32);
1011 ASSERT(size != 0);
lrn@chromium.org7516f052011-03-30 08:52:27 +00001012
mstarzinger@chromium.org3233d2f2012-03-14 11:16:03 +00001013 if (kArchVariant == kMips32r2) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00001014 ins_(rt, rs, pos, size);
1015 } else {
1016 ASSERT(!rt.is(t8) && !rs.is(t8));
erikcorry0ad885c2011-11-21 13:51:57 +00001017 Subu(at, zero_reg, Operand(1));
1018 srl(at, at, 32 - size);
1019 and_(t8, rs, at);
1020 sll(t8, t8, pos);
1021 sll(at, at, pos);
1022 nor(at, at, zero_reg);
1023 and_(at, rt, at);
1024 or_(rt, t8, at);
lrn@chromium.org7516f052011-03-30 08:52:27 +00001025 }
1026}
1027
1028
ricow@chromium.org4668a2c2011-08-29 10:41:00 +00001029void MacroAssembler::Cvt_d_uw(FPURegister fd,
1030 FPURegister fs,
1031 FPURegister scratch) {
1032 // Move the data from fs to t8.
1033 mfc1(t8, fs);
1034 Cvt_d_uw(fd, t8, scratch);
lrn@chromium.org7516f052011-03-30 08:52:27 +00001035}
1036
1037
ricow@chromium.org4668a2c2011-08-29 10:41:00 +00001038void MacroAssembler::Cvt_d_uw(FPURegister fd,
1039 Register rs,
1040 FPURegister scratch) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00001041 // Convert rs to a FP value in fd (and fd + 1).
1042 // We do this by converting rs minus the MSB to avoid sign conversion,
ricow@chromium.org4668a2c2011-08-29 10:41:00 +00001043 // then adding 2^31 to the result (if needed).
lrn@chromium.org7516f052011-03-30 08:52:27 +00001044
ricow@chromium.org4668a2c2011-08-29 10:41:00 +00001045 ASSERT(!fd.is(scratch));
lrn@chromium.org7516f052011-03-30 08:52:27 +00001046 ASSERT(!rs.is(t9));
ricow@chromium.org4668a2c2011-08-29 10:41:00 +00001047 ASSERT(!rs.is(at));
lrn@chromium.org7516f052011-03-30 08:52:27 +00001048
ricow@chromium.org4668a2c2011-08-29 10:41:00 +00001049 // Save rs's MSB to t9.
1050 Ext(t9, rs, 31, 1);
lrn@chromium.org7516f052011-03-30 08:52:27 +00001051 // Remove rs's MSB.
ricow@chromium.org4668a2c2011-08-29 10:41:00 +00001052 Ext(at, rs, 0, 31);
1053 // Move the result to fd.
1054 mtc1(at, fd);
lrn@chromium.org7516f052011-03-30 08:52:27 +00001055
1056 // Convert fd to a real FP value.
1057 cvt_d_w(fd, fd);
1058
1059 Label conversion_done;
1060
1061 // If rs's MSB was 0, it's done.
1062 // Otherwise we need to add that to the FP register.
ricow@chromium.org4668a2c2011-08-29 10:41:00 +00001063 Branch(&conversion_done, eq, t9, Operand(zero_reg));
lrn@chromium.org7516f052011-03-30 08:52:27 +00001064
ricow@chromium.org4668a2c2011-08-29 10:41:00 +00001065 // Load 2^31 into f20 as its float representation.
1066 li(at, 0x41E00000);
1067 mtc1(at, FPURegister::from_code(scratch.code() + 1));
1068 mtc1(zero_reg, scratch);
1069 // Add it to fd.
1070 add_d(fd, fd, scratch);
lrn@chromium.org7516f052011-03-30 08:52:27 +00001071
lrn@chromium.org7516f052011-03-30 08:52:27 +00001072 bind(&conversion_done);
1073}
1074
1075
ricow@chromium.org4668a2c2011-08-29 10:41:00 +00001076void MacroAssembler::Trunc_uw_d(FPURegister fd,
1077 FPURegister fs,
1078 FPURegister scratch) {
1079 Trunc_uw_d(fs, t8, scratch);
1080 mtc1(t8, fd);
lrn@chromium.org7516f052011-03-30 08:52:27 +00001081}
1082
mstarzinger@chromium.orge0e1b0d2013-07-08 08:38:06 +00001083
mstarzinger@chromium.org3233d2f2012-03-14 11:16:03 +00001084void MacroAssembler::Trunc_w_d(FPURegister fd, FPURegister fs) {
1085 if (kArchVariant == kLoongson && fd.is(fs)) {
1086 mfc1(t8, FPURegister::from_code(fs.code() + 1));
1087 trunc_w_d(fd, fs);
1088 mtc1(t8, FPURegister::from_code(fs.code() + 1));
1089 } else {
1090 trunc_w_d(fd, fs);
1091 }
1092}
1093
mstarzinger@chromium.orge0e1b0d2013-07-08 08:38:06 +00001094
mstarzinger@chromium.org3233d2f2012-03-14 11:16:03 +00001095void MacroAssembler::Round_w_d(FPURegister fd, FPURegister fs) {
1096 if (kArchVariant == kLoongson && fd.is(fs)) {
1097 mfc1(t8, FPURegister::from_code(fs.code() + 1));
1098 round_w_d(fd, fs);
1099 mtc1(t8, FPURegister::from_code(fs.code() + 1));
1100 } else {
1101 round_w_d(fd, fs);
1102 }
1103}
1104
1105
1106void MacroAssembler::Floor_w_d(FPURegister fd, FPURegister fs) {
1107 if (kArchVariant == kLoongson && fd.is(fs)) {
1108 mfc1(t8, FPURegister::from_code(fs.code() + 1));
1109 floor_w_d(fd, fs);
1110 mtc1(t8, FPURegister::from_code(fs.code() + 1));
1111 } else {
1112 floor_w_d(fd, fs);
1113 }
1114}
1115
1116
1117void MacroAssembler::Ceil_w_d(FPURegister fd, FPURegister fs) {
1118 if (kArchVariant == kLoongson && fd.is(fs)) {
1119 mfc1(t8, FPURegister::from_code(fs.code() + 1));
1120 ceil_w_d(fd, fs);
1121 mtc1(t8, FPURegister::from_code(fs.code() + 1));
1122 } else {
1123 ceil_w_d(fd, fs);
1124 }
1125}
1126
lrn@chromium.org7516f052011-03-30 08:52:27 +00001127
ricow@chromium.org4668a2c2011-08-29 10:41:00 +00001128void MacroAssembler::Trunc_uw_d(FPURegister fd,
1129 Register rs,
1130 FPURegister scratch) {
1131 ASSERT(!fd.is(scratch));
1132 ASSERT(!rs.is(at));
lrn@chromium.org7516f052011-03-30 08:52:27 +00001133
ricow@chromium.org4668a2c2011-08-29 10:41:00 +00001134 // Load 2^31 into scratch as its float representation.
1135 li(at, 0x41E00000);
1136 mtc1(at, FPURegister::from_code(scratch.code() + 1));
1137 mtc1(zero_reg, scratch);
1138 // Test if scratch > fd.
lrn@chromium.org7516f052011-03-30 08:52:27 +00001139 // If fd < 2^31 we can convert it normally.
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001140 Label simple_convert;
1141 BranchF(&simple_convert, NULL, lt, fd, scratch);
lrn@chromium.org7516f052011-03-30 08:52:27 +00001142
1143 // First we subtract 2^31 from fd, then trunc it to rs
1144 // and add 2^31 to rs.
ricow@chromium.org4668a2c2011-08-29 10:41:00 +00001145 sub_d(scratch, fd, scratch);
1146 trunc_w_d(scratch, scratch);
1147 mfc1(rs, scratch);
1148 Or(rs, rs, 1 << 31);
lrn@chromium.org7516f052011-03-30 08:52:27 +00001149
1150 Label done;
1151 Branch(&done);
1152 // Simple conversion.
1153 bind(&simple_convert);
ricow@chromium.org4668a2c2011-08-29 10:41:00 +00001154 trunc_w_d(scratch, fd);
1155 mfc1(rs, scratch);
lrn@chromium.org7516f052011-03-30 08:52:27 +00001156
1157 bind(&done);
1158}
1159
1160
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001161void MacroAssembler::BranchF(Label* target,
1162 Label* nan,
1163 Condition cc,
1164 FPURegister cmp1,
1165 FPURegister cmp2,
1166 BranchDelaySlot bd) {
jkummerow@chromium.org7bd87f02013-03-20 18:06:29 +00001167 BlockTrampolinePoolScope block_trampoline_pool(this);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001168 if (cc == al) {
1169 Branch(bd, target);
1170 return;
1171 }
1172
1173 ASSERT(nan || target);
1174 // Check for unordered (NaN) cases.
1175 if (nan) {
1176 c(UN, D, cmp1, cmp2);
1177 bc1t(nan);
1178 }
1179
1180 if (target) {
1181 // Here NaN cases were either handled by this function or are assumed to
1182 // have been handled by the caller.
1183 // Unsigned conditions are treated as their signed counterpart.
1184 switch (cc) {
ulan@chromium.org750145a2013-03-07 15:14:13 +00001185 case lt:
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001186 c(OLT, D, cmp1, cmp2);
1187 bc1t(target);
1188 break;
ulan@chromium.org750145a2013-03-07 15:14:13 +00001189 case gt:
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001190 c(ULE, D, cmp1, cmp2);
1191 bc1f(target);
1192 break;
ulan@chromium.org750145a2013-03-07 15:14:13 +00001193 case ge:
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001194 c(ULT, D, cmp1, cmp2);
1195 bc1f(target);
1196 break;
ulan@chromium.org750145a2013-03-07 15:14:13 +00001197 case le:
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001198 c(OLE, D, cmp1, cmp2);
1199 bc1t(target);
1200 break;
1201 case eq:
1202 c(EQ, D, cmp1, cmp2);
1203 bc1t(target);
1204 break;
ulan@chromium.org750145a2013-03-07 15:14:13 +00001205 case ueq:
1206 c(UEQ, D, cmp1, cmp2);
1207 bc1t(target);
1208 break;
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001209 case ne:
1210 c(EQ, D, cmp1, cmp2);
1211 bc1f(target);
1212 break;
ulan@chromium.org750145a2013-03-07 15:14:13 +00001213 case nue:
1214 c(UEQ, D, cmp1, cmp2);
1215 bc1f(target);
1216 break;
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001217 default:
1218 CHECK(0);
1219 };
1220 }
1221
1222 if (bd == PROTECT) {
1223 nop();
1224 }
1225}
1226
1227
1228void MacroAssembler::Move(FPURegister dst, double imm) {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001229 static const DoubleRepresentation minus_zero(-0.0);
1230 static const DoubleRepresentation zero(0.0);
hpayer@chromium.orgea9b8ba2013-12-20 19:22:39 +00001231 DoubleRepresentation value_rep(imm);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001232 // Handle special values first.
1233 bool force_load = dst.is(kDoubleRegZero);
hpayer@chromium.orgea9b8ba2013-12-20 19:22:39 +00001234 if (value_rep == zero && !force_load) {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001235 mov_d(dst, kDoubleRegZero);
hpayer@chromium.orgea9b8ba2013-12-20 19:22:39 +00001236 } else if (value_rep == minus_zero && !force_load) {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001237 neg_d(dst, kDoubleRegZero);
1238 } else {
1239 uint32_t lo, hi;
1240 DoubleAsTwoUInt32(imm, &lo, &hi);
1241 // Move the low part of the double into the lower of the corresponding FPU
1242 // register of FPU register pair.
1243 if (lo != 0) {
1244 li(at, Operand(lo));
1245 mtc1(at, dst);
1246 } else {
1247 mtc1(zero_reg, dst);
1248 }
1249 // Move the high part of the double into the higher of the corresponding FPU
1250 // register of FPU register pair.
1251 if (hi != 0) {
1252 li(at, Operand(hi));
1253 mtc1(at, dst.high());
1254 } else {
1255 mtc1(zero_reg, dst.high());
1256 }
1257 }
1258}
1259
1260
mstarzinger@chromium.org3233d2f2012-03-14 11:16:03 +00001261void MacroAssembler::Movz(Register rd, Register rs, Register rt) {
1262 if (kArchVariant == kLoongson) {
1263 Label done;
1264 Branch(&done, ne, rt, Operand(zero_reg));
1265 mov(rd, rs);
1266 bind(&done);
1267 } else {
1268 movz(rd, rs, rt);
1269 }
1270}
1271
1272
1273void MacroAssembler::Movn(Register rd, Register rs, Register rt) {
1274 if (kArchVariant == kLoongson) {
1275 Label done;
1276 Branch(&done, eq, rt, Operand(zero_reg));
1277 mov(rd, rs);
1278 bind(&done);
1279 } else {
1280 movn(rd, rs, rt);
1281 }
1282}
1283
1284
1285void MacroAssembler::Movt(Register rd, Register rs, uint16_t cc) {
1286 if (kArchVariant == kLoongson) {
1287 // Tests an FP condition code and then conditionally move rs to rd.
1288 // We do not currently use any FPU cc bit other than bit 0.
1289 ASSERT(cc == 0);
1290 ASSERT(!(rs.is(t8) || rd.is(t8)));
1291 Label done;
1292 Register scratch = t8;
1293 // For testing purposes we need to fetch content of the FCSR register and
1294 // than test its cc (floating point condition code) bit (for cc = 0, it is
1295 // 24. bit of the FCSR).
1296 cfc1(scratch, FCSR);
1297 // For the MIPS I, II and III architectures, the contents of scratch is
1298 // UNPREDICTABLE for the instruction immediately following CFC1.
1299 nop();
1300 srl(scratch, scratch, 16);
1301 andi(scratch, scratch, 0x0080);
1302 Branch(&done, eq, scratch, Operand(zero_reg));
1303 mov(rd, rs);
1304 bind(&done);
1305 } else {
1306 movt(rd, rs, cc);
1307 }
1308}
1309
1310
1311void MacroAssembler::Movf(Register rd, Register rs, uint16_t cc) {
1312 if (kArchVariant == kLoongson) {
1313 // Tests an FP condition code and then conditionally move rs to rd.
1314 // We do not currently use any FPU cc bit other than bit 0.
1315 ASSERT(cc == 0);
1316 ASSERT(!(rs.is(t8) || rd.is(t8)));
1317 Label done;
1318 Register scratch = t8;
1319 // For testing purposes we need to fetch content of the FCSR register and
1320 // than test its cc (floating point condition code) bit (for cc = 0, it is
1321 // 24. bit of the FCSR).
1322 cfc1(scratch, FCSR);
1323 // For the MIPS I, II and III architectures, the contents of scratch is
1324 // UNPREDICTABLE for the instruction immediately following CFC1.
1325 nop();
1326 srl(scratch, scratch, 16);
1327 andi(scratch, scratch, 0x0080);
1328 Branch(&done, ne, scratch, Operand(zero_reg));
1329 mov(rd, rs);
1330 bind(&done);
1331 } else {
1332 movf(rd, rs, cc);
1333 }
1334}
1335
1336
1337void MacroAssembler::Clz(Register rd, Register rs) {
1338 if (kArchVariant == kLoongson) {
1339 ASSERT(!(rd.is(t8) || rd.is(t9)) && !(rs.is(t8) || rs.is(t9)));
1340 Register mask = t8;
1341 Register scratch = t9;
1342 Label loop, end;
1343 mov(at, rs);
1344 mov(rd, zero_reg);
1345 lui(mask, 0x8000);
1346 bind(&loop);
1347 and_(scratch, at, mask);
1348 Branch(&end, ne, scratch, Operand(zero_reg));
1349 addiu(rd, rd, 1);
1350 Branch(&loop, ne, mask, Operand(zero_reg), USE_DELAY_SLOT);
1351 srl(mask, mask, 1);
1352 bind(&end);
1353 } else {
1354 clz(rd, rs);
1355 }
1356}
1357
1358
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001359void MacroAssembler::EmitFPUTruncate(FPURoundingMode rounding_mode,
svenpanne@chromium.org83130cf2012-11-30 10:13:25 +00001360 Register result,
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001361 DoubleRegister double_input,
svenpanne@chromium.org83130cf2012-11-30 10:13:25 +00001362 Register scratch,
1363 DoubleRegister double_scratch,
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001364 Register except_flag,
1365 CheckForInexactConversion check_inexact) {
svenpanne@chromium.org83130cf2012-11-30 10:13:25 +00001366 ASSERT(!result.is(scratch));
1367 ASSERT(!double_input.is(double_scratch));
1368 ASSERT(!except_flag.is(scratch));
1369
svenpanne@chromium.org83130cf2012-11-30 10:13:25 +00001370 Label done;
1371
1372 // Clear the except flag (0 = no exception)
1373 mov(except_flag, zero_reg);
1374
1375 // Test for values that can be exactly represented as a signed 32-bit integer.
1376 cvt_w_d(double_scratch, double_input);
1377 mfc1(result, double_scratch);
1378 cvt_d_w(double_scratch, double_scratch);
1379 BranchF(&done, NULL, eq, double_input, double_scratch);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001380
1381 int32_t except_mask = kFCSRFlagMask; // Assume interested in all exceptions.
1382
1383 if (check_inexact == kDontCheckForInexactConversion) {
svenpanne@chromium.org83130cf2012-11-30 10:13:25 +00001384 // Ignore inexact exceptions.
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001385 except_mask &= ~kFCSRInexactFlagMask;
1386 }
1387
1388 // Save FCSR.
svenpanne@chromium.org83130cf2012-11-30 10:13:25 +00001389 cfc1(scratch, FCSR);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001390 // Disable FPU exceptions.
1391 ctc1(zero_reg, FCSR);
1392
1393 // Do operation based on rounding mode.
1394 switch (rounding_mode) {
1395 case kRoundToNearest:
svenpanne@chromium.org83130cf2012-11-30 10:13:25 +00001396 Round_w_d(double_scratch, double_input);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001397 break;
1398 case kRoundToZero:
svenpanne@chromium.org83130cf2012-11-30 10:13:25 +00001399 Trunc_w_d(double_scratch, double_input);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001400 break;
1401 case kRoundToPlusInf:
svenpanne@chromium.org83130cf2012-11-30 10:13:25 +00001402 Ceil_w_d(double_scratch, double_input);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001403 break;
1404 case kRoundToMinusInf:
svenpanne@chromium.org83130cf2012-11-30 10:13:25 +00001405 Floor_w_d(double_scratch, double_input);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001406 break;
1407 } // End of switch-statement.
1408
1409 // Retrieve FCSR.
1410 cfc1(except_flag, FCSR);
1411 // Restore FCSR.
svenpanne@chromium.org83130cf2012-11-30 10:13:25 +00001412 ctc1(scratch, FCSR);
1413 // Move the converted value into the result register.
1414 mfc1(result, double_scratch);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001415
1416 // Check for fpu exceptions.
1417 And(except_flag, except_flag, Operand(except_mask));
svenpanne@chromium.org83130cf2012-11-30 10:13:25 +00001418
1419 bind(&done);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001420}
1421
1422
jkummerow@chromium.org8fa5bd92013-09-02 11:45:09 +00001423void MacroAssembler::TryInlineTruncateDoubleToI(Register result,
1424 DoubleRegister double_input,
1425 Label* done) {
1426 DoubleRegister single_scratch = kLithiumScratchDouble.low();
1427 Register scratch = at;
1428 Register scratch2 = t9;
erik.corry@gmail.comd6076d92011-06-06 09:39:18 +00001429
1430 // Clear cumulative exception flags and save the FCSR.
erik.corry@gmail.comd6076d92011-06-06 09:39:18 +00001431 cfc1(scratch2, FCSR);
1432 ctc1(zero_reg, FCSR);
1433 // Try a conversion to a signed integer.
1434 trunc_w_d(single_scratch, double_input);
1435 mfc1(result, single_scratch);
1436 // Retrieve and restore the FCSR.
1437 cfc1(scratch, FCSR);
1438 ctc1(scratch2, FCSR);
1439 // Check for overflow and NaNs.
1440 And(scratch,
1441 scratch,
1442 kFCSROverflowFlagMask | kFCSRUnderflowFlagMask | kFCSRInvalidOpFlagMask);
1443 // If we had no exceptions we are done.
jkummerow@chromium.org8fa5bd92013-09-02 11:45:09 +00001444 Branch(done, eq, scratch, Operand(zero_reg));
1445}
erik.corry@gmail.comd6076d92011-06-06 09:39:18 +00001446
jkummerow@chromium.org8fa5bd92013-09-02 11:45:09 +00001447
1448void MacroAssembler::TruncateDoubleToI(Register result,
1449 DoubleRegister double_input) {
1450 Label done;
1451
1452 TryInlineTruncateDoubleToI(result, double_input, &done);
1453
1454 // If we fell through then inline version didn't succeed - call stub instead.
1455 push(ra);
1456 Subu(sp, sp, Operand(kDoubleSize)); // Put input on stack.
1457 sdc1(double_input, MemOperand(sp, 0));
1458
1459 DoubleToIStub stub(sp, result, 0, true, true);
1460 CallStub(&stub);
1461
1462 Addu(sp, sp, Operand(kDoubleSize));
1463 pop(ra);
1464
1465 bind(&done);
1466}
1467
1468
1469void MacroAssembler::TruncateHeapNumberToI(Register result, Register object) {
1470 Label done;
1471 DoubleRegister double_scratch = f12;
1472 ASSERT(!result.is(object));
1473
1474 ldc1(double_scratch,
1475 MemOperand(object, HeapNumber::kValueOffset - kHeapObjectTag));
1476 TryInlineTruncateDoubleToI(result, double_scratch, &done);
1477
1478 // If we fell through then inline version didn't succeed - call stub instead.
1479 push(ra);
1480 DoubleToIStub stub(object,
1481 result,
1482 HeapNumber::kValueOffset - kHeapObjectTag,
1483 true,
1484 true);
1485 CallStub(&stub);
1486 pop(ra);
1487
1488 bind(&done);
1489}
1490
1491
1492void MacroAssembler::TruncateNumberToI(Register object,
1493 Register result,
1494 Register heap_number_map,
jkummerow@chromium.org3d00d0a2013-09-04 13:57:32 +00001495 Register scratch,
jkummerow@chromium.org8fa5bd92013-09-02 11:45:09 +00001496 Label* not_number) {
1497 Label done;
jkummerow@chromium.org3d00d0a2013-09-04 13:57:32 +00001498 ASSERT(!result.is(object));
jkummerow@chromium.org8fa5bd92013-09-02 11:45:09 +00001499
1500 UntagAndJumpIfSmi(result, object, &done);
jkummerow@chromium.org3d00d0a2013-09-04 13:57:32 +00001501 JumpIfNotHeapNumber(object, heap_number_map, scratch, not_number);
1502 TruncateHeapNumberToI(result, object);
jkummerow@chromium.org8fa5bd92013-09-02 11:45:09 +00001503
erik.corry@gmail.comd6076d92011-06-06 09:39:18 +00001504 bind(&done);
1505}
1506
1507
karlklose@chromium.org83a47282011-05-11 11:54:09 +00001508void MacroAssembler::GetLeastBitsFromSmi(Register dst,
1509 Register src,
1510 int num_least_bits) {
1511 Ext(dst, src, kSmiTagSize, num_least_bits);
1512}
1513
1514
1515void MacroAssembler::GetLeastBitsFromInt32(Register dst,
1516 Register src,
1517 int num_least_bits) {
1518 And(dst, src, Operand((1 << num_least_bits) - 1));
1519}
1520
1521
lrn@chromium.org7516f052011-03-30 08:52:27 +00001522// Emulated condtional branches do not emit a nop in the branch delay slot.
1523//
1524// BRANCH_ARGS_CHECK checks that conditional jump arguments are correct.
1525#define BRANCH_ARGS_CHECK(cond, rs, rt) ASSERT( \
1526 (cond == cc_always && rs.is(zero_reg) && rt.rm().is(zero_reg)) || \
1527 (cond != cc_always && (!rs.is(zero_reg) || !rt.rm().is(zero_reg))))
1528
1529
1530void MacroAssembler::Branch(int16_t offset, BranchDelaySlot bdslot) {
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00001531 BranchShort(offset, bdslot);
1532}
1533
1534
1535void MacroAssembler::Branch(int16_t offset, Condition cond, Register rs,
1536 const Operand& rt,
1537 BranchDelaySlot bdslot) {
1538 BranchShort(offset, cond, rs, rt, bdslot);
1539}
1540
1541
1542void MacroAssembler::Branch(Label* L, BranchDelaySlot bdslot) {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001543 if (L->is_bound()) {
1544 if (is_near(L)) {
1545 BranchShort(L, bdslot);
1546 } else {
1547 Jr(L, bdslot);
1548 }
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00001549 } else {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001550 if (is_trampoline_emitted()) {
1551 Jr(L, bdslot);
1552 } else {
1553 BranchShort(L, bdslot);
1554 }
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00001555 }
1556}
1557
1558
1559void MacroAssembler::Branch(Label* L, Condition cond, Register rs,
1560 const Operand& rt,
1561 BranchDelaySlot bdslot) {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001562 if (L->is_bound()) {
1563 if (is_near(L)) {
1564 BranchShort(L, cond, rs, rt, bdslot);
1565 } else {
bmeurer@chromium.org25530ce2014-02-07 09:11:16 +00001566 if (cond != cc_always) {
1567 Label skip;
1568 Condition neg_cond = NegateCondition(cond);
1569 BranchShort(&skip, neg_cond, rs, rt);
1570 Jr(L, bdslot);
1571 bind(&skip);
1572 } else {
1573 Jr(L, bdslot);
1574 }
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001575 }
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00001576 } else {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001577 if (is_trampoline_emitted()) {
bmeurer@chromium.org25530ce2014-02-07 09:11:16 +00001578 if (cond != cc_always) {
1579 Label skip;
1580 Condition neg_cond = NegateCondition(cond);
1581 BranchShort(&skip, neg_cond, rs, rt);
1582 Jr(L, bdslot);
1583 bind(&skip);
1584 } else {
1585 Jr(L, bdslot);
1586 }
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001587 } else {
1588 BranchShort(L, cond, rs, rt, bdslot);
1589 }
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00001590 }
1591}
1592
1593
danno@chromium.org88aa0582012-03-23 15:11:57 +00001594void MacroAssembler::Branch(Label* L,
1595 Condition cond,
1596 Register rs,
1597 Heap::RootListIndex index,
1598 BranchDelaySlot bdslot) {
1599 LoadRoot(at, index);
1600 Branch(L, cond, rs, Operand(at), bdslot);
1601}
1602
1603
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00001604void MacroAssembler::BranchShort(int16_t offset, BranchDelaySlot bdslot) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00001605 b(offset);
1606
1607 // Emit a nop in the branch delay slot if required.
1608 if (bdslot == PROTECT)
1609 nop();
1610}
1611
1612
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00001613void MacroAssembler::BranchShort(int16_t offset, Condition cond, Register rs,
1614 const Operand& rt,
1615 BranchDelaySlot bdslot) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00001616 BRANCH_ARGS_CHECK(cond, rs, rt);
1617 ASSERT(!rs.is(zero_reg));
ager@chromium.orgce5e87b2010-03-10 10:24:18 +00001618 Register r2 = no_reg;
lrn@chromium.org7516f052011-03-30 08:52:27 +00001619 Register scratch = at;
1620
ager@chromium.org5c838252010-02-19 08:53:10 +00001621 if (rt.is_reg()) {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00001622 // NOTE: 'at' can be clobbered by Branch but it is legal to use it as rs or
1623 // rt.
jkummerow@chromium.org7bd87f02013-03-20 18:06:29 +00001624 BlockTrampolinePoolScope block_trampoline_pool(this);
ager@chromium.org5c838252010-02-19 08:53:10 +00001625 r2 = rt.rm_;
lrn@chromium.org7516f052011-03-30 08:52:27 +00001626 switch (cond) {
1627 case cc_always:
1628 b(offset);
1629 break;
1630 case eq:
1631 beq(rs, r2, offset);
1632 break;
1633 case ne:
1634 bne(rs, r2, offset);
1635 break;
karlklose@chromium.org83a47282011-05-11 11:54:09 +00001636 // Signed comparison.
lrn@chromium.org7516f052011-03-30 08:52:27 +00001637 case greater:
1638 if (r2.is(zero_reg)) {
1639 bgtz(rs, offset);
1640 } else {
1641 slt(scratch, r2, rs);
1642 bne(scratch, zero_reg, offset);
1643 }
1644 break;
1645 case greater_equal:
1646 if (r2.is(zero_reg)) {
1647 bgez(rs, offset);
1648 } else {
1649 slt(scratch, rs, r2);
1650 beq(scratch, zero_reg, offset);
1651 }
1652 break;
1653 case less:
1654 if (r2.is(zero_reg)) {
1655 bltz(rs, offset);
1656 } else {
1657 slt(scratch, rs, r2);
1658 bne(scratch, zero_reg, offset);
1659 }
1660 break;
1661 case less_equal:
1662 if (r2.is(zero_reg)) {
1663 blez(rs, offset);
1664 } else {
1665 slt(scratch, r2, rs);
1666 beq(scratch, zero_reg, offset);
1667 }
1668 break;
ager@chromium.org5c838252010-02-19 08:53:10 +00001669 // Unsigned comparison.
lrn@chromium.org7516f052011-03-30 08:52:27 +00001670 case Ugreater:
1671 if (r2.is(zero_reg)) {
1672 bgtz(rs, offset);
1673 } else {
1674 sltu(scratch, r2, rs);
1675 bne(scratch, zero_reg, offset);
1676 }
1677 break;
1678 case Ugreater_equal:
1679 if (r2.is(zero_reg)) {
1680 bgez(rs, offset);
1681 } else {
1682 sltu(scratch, rs, r2);
1683 beq(scratch, zero_reg, offset);
1684 }
1685 break;
1686 case Uless:
1687 if (r2.is(zero_reg)) {
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00001688 // No code needs to be emitted.
1689 return;
lrn@chromium.org7516f052011-03-30 08:52:27 +00001690 } else {
1691 sltu(scratch, rs, r2);
1692 bne(scratch, zero_reg, offset);
1693 }
1694 break;
1695 case Uless_equal:
1696 if (r2.is(zero_reg)) {
1697 b(offset);
1698 } else {
1699 sltu(scratch, r2, rs);
1700 beq(scratch, zero_reg, offset);
1701 }
1702 break;
1703 default:
1704 UNREACHABLE();
1705 }
1706 } else {
1707 // Be careful to always use shifted_branch_offset only just before the
1708 // branch instruction, as the location will be remember for patching the
1709 // target.
jkummerow@chromium.org7bd87f02013-03-20 18:06:29 +00001710 BlockTrampolinePoolScope block_trampoline_pool(this);
lrn@chromium.org7516f052011-03-30 08:52:27 +00001711 switch (cond) {
1712 case cc_always:
1713 b(offset);
1714 break;
1715 case eq:
1716 // We don't want any other register but scratch clobbered.
1717 ASSERT(!scratch.is(rs));
1718 r2 = scratch;
1719 li(r2, rt);
1720 beq(rs, r2, offset);
1721 break;
1722 case ne:
1723 // We don't want any other register but scratch clobbered.
1724 ASSERT(!scratch.is(rs));
1725 r2 = scratch;
1726 li(r2, rt);
1727 bne(rs, r2, offset);
1728 break;
karlklose@chromium.org83a47282011-05-11 11:54:09 +00001729 // Signed comparison.
lrn@chromium.org7516f052011-03-30 08:52:27 +00001730 case greater:
1731 if (rt.imm32_ == 0) {
1732 bgtz(rs, offset);
1733 } else {
1734 r2 = scratch;
1735 li(r2, rt);
1736 slt(scratch, r2, rs);
1737 bne(scratch, zero_reg, offset);
1738 }
1739 break;
1740 case greater_equal:
1741 if (rt.imm32_ == 0) {
1742 bgez(rs, offset);
1743 } else if (is_int16(rt.imm32_)) {
1744 slti(scratch, rs, rt.imm32_);
1745 beq(scratch, zero_reg, offset);
1746 } else {
1747 r2 = scratch;
1748 li(r2, rt);
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00001749 slt(scratch, rs, r2);
lrn@chromium.org7516f052011-03-30 08:52:27 +00001750 beq(scratch, zero_reg, offset);
1751 }
1752 break;
1753 case less:
1754 if (rt.imm32_ == 0) {
1755 bltz(rs, offset);
1756 } else if (is_int16(rt.imm32_)) {
1757 slti(scratch, rs, rt.imm32_);
1758 bne(scratch, zero_reg, offset);
1759 } else {
1760 r2 = scratch;
1761 li(r2, rt);
1762 slt(scratch, rs, r2);
1763 bne(scratch, zero_reg, offset);
1764 }
1765 break;
1766 case less_equal:
1767 if (rt.imm32_ == 0) {
1768 blez(rs, offset);
1769 } else {
1770 r2 = scratch;
1771 li(r2, rt);
1772 slt(scratch, r2, rs);
1773 beq(scratch, zero_reg, offset);
1774 }
1775 break;
1776 // Unsigned comparison.
1777 case Ugreater:
1778 if (rt.imm32_ == 0) {
1779 bgtz(rs, offset);
1780 } else {
1781 r2 = scratch;
1782 li(r2, rt);
1783 sltu(scratch, r2, rs);
1784 bne(scratch, zero_reg, offset);
1785 }
1786 break;
1787 case Ugreater_equal:
1788 if (rt.imm32_ == 0) {
1789 bgez(rs, offset);
1790 } else if (is_int16(rt.imm32_)) {
1791 sltiu(scratch, rs, rt.imm32_);
1792 beq(scratch, zero_reg, offset);
1793 } else {
1794 r2 = scratch;
1795 li(r2, rt);
1796 sltu(scratch, rs, r2);
1797 beq(scratch, zero_reg, offset);
1798 }
1799 break;
1800 case Uless:
1801 if (rt.imm32_ == 0) {
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00001802 // No code needs to be emitted.
1803 return;
lrn@chromium.org7516f052011-03-30 08:52:27 +00001804 } else if (is_int16(rt.imm32_)) {
1805 sltiu(scratch, rs, rt.imm32_);
1806 bne(scratch, zero_reg, offset);
1807 } else {
1808 r2 = scratch;
1809 li(r2, rt);
1810 sltu(scratch, rs, r2);
1811 bne(scratch, zero_reg, offset);
1812 }
1813 break;
1814 case Uless_equal:
1815 if (rt.imm32_ == 0) {
1816 b(offset);
1817 } else {
1818 r2 = scratch;
1819 li(r2, rt);
1820 sltu(scratch, r2, rs);
1821 beq(scratch, zero_reg, offset);
1822 }
1823 break;
1824 default:
1825 UNREACHABLE();
1826 }
ager@chromium.org5c838252010-02-19 08:53:10 +00001827 }
lrn@chromium.org7516f052011-03-30 08:52:27 +00001828 // Emit a nop in the branch delay slot if required.
1829 if (bdslot == PROTECT)
1830 nop();
ager@chromium.org5c838252010-02-19 08:53:10 +00001831}
1832
1833
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00001834void MacroAssembler::BranchShort(Label* L, BranchDelaySlot bdslot) {
ager@chromium.org5c838252010-02-19 08:53:10 +00001835 // We use branch_offset as an argument for the branch instructions to be sure
1836 // it is called just before generating the branch instruction, as needed.
1837
lrn@chromium.org7516f052011-03-30 08:52:27 +00001838 b(shifted_branch_offset(L, false));
ager@chromium.org5c838252010-02-19 08:53:10 +00001839
lrn@chromium.org7516f052011-03-30 08:52:27 +00001840 // Emit a nop in the branch delay slot if required.
1841 if (bdslot == PROTECT)
1842 nop();
ager@chromium.org5c838252010-02-19 08:53:10 +00001843}
1844
1845
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00001846void MacroAssembler::BranchShort(Label* L, Condition cond, Register rs,
1847 const Operand& rt,
1848 BranchDelaySlot bdslot) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00001849 BRANCH_ARGS_CHECK(cond, rs, rt);
1850
mstarzinger@chromium.orgf705b502013-04-04 11:38:09 +00001851 int32_t offset = 0;
lrn@chromium.org7516f052011-03-30 08:52:27 +00001852 Register r2 = no_reg;
1853 Register scratch = at;
1854 if (rt.is_reg()) {
jkummerow@chromium.org7bd87f02013-03-20 18:06:29 +00001855 BlockTrampolinePoolScope block_trampoline_pool(this);
lrn@chromium.org7516f052011-03-30 08:52:27 +00001856 r2 = rt.rm_;
1857 // Be careful to always use shifted_branch_offset only just before the
1858 // branch instruction, as the location will be remember for patching the
1859 // target.
1860 switch (cond) {
1861 case cc_always:
1862 offset = shifted_branch_offset(L, false);
1863 b(offset);
1864 break;
1865 case eq:
1866 offset = shifted_branch_offset(L, false);
1867 beq(rs, r2, offset);
1868 break;
1869 case ne:
1870 offset = shifted_branch_offset(L, false);
1871 bne(rs, r2, offset);
1872 break;
karlklose@chromium.org83a47282011-05-11 11:54:09 +00001873 // Signed comparison.
lrn@chromium.org7516f052011-03-30 08:52:27 +00001874 case greater:
1875 if (r2.is(zero_reg)) {
1876 offset = shifted_branch_offset(L, false);
1877 bgtz(rs, offset);
1878 } else {
1879 slt(scratch, r2, rs);
1880 offset = shifted_branch_offset(L, false);
1881 bne(scratch, zero_reg, offset);
1882 }
1883 break;
1884 case greater_equal:
1885 if (r2.is(zero_reg)) {
1886 offset = shifted_branch_offset(L, false);
1887 bgez(rs, offset);
1888 } else {
1889 slt(scratch, rs, r2);
1890 offset = shifted_branch_offset(L, false);
1891 beq(scratch, zero_reg, offset);
1892 }
1893 break;
1894 case less:
1895 if (r2.is(zero_reg)) {
1896 offset = shifted_branch_offset(L, false);
1897 bltz(rs, offset);
1898 } else {
1899 slt(scratch, rs, r2);
1900 offset = shifted_branch_offset(L, false);
1901 bne(scratch, zero_reg, offset);
1902 }
1903 break;
1904 case less_equal:
1905 if (r2.is(zero_reg)) {
1906 offset = shifted_branch_offset(L, false);
1907 blez(rs, offset);
1908 } else {
1909 slt(scratch, r2, rs);
1910 offset = shifted_branch_offset(L, false);
1911 beq(scratch, zero_reg, offset);
1912 }
1913 break;
1914 // Unsigned comparison.
1915 case Ugreater:
1916 if (r2.is(zero_reg)) {
1917 offset = shifted_branch_offset(L, false);
1918 bgtz(rs, offset);
1919 } else {
1920 sltu(scratch, r2, rs);
1921 offset = shifted_branch_offset(L, false);
1922 bne(scratch, zero_reg, offset);
1923 }
1924 break;
1925 case Ugreater_equal:
1926 if (r2.is(zero_reg)) {
1927 offset = shifted_branch_offset(L, false);
1928 bgez(rs, offset);
1929 } else {
1930 sltu(scratch, rs, r2);
1931 offset = shifted_branch_offset(L, false);
1932 beq(scratch, zero_reg, offset);
1933 }
1934 break;
1935 case Uless:
1936 if (r2.is(zero_reg)) {
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00001937 // No code needs to be emitted.
1938 return;
lrn@chromium.org7516f052011-03-30 08:52:27 +00001939 } else {
1940 sltu(scratch, rs, r2);
1941 offset = shifted_branch_offset(L, false);
1942 bne(scratch, zero_reg, offset);
1943 }
1944 break;
1945 case Uless_equal:
1946 if (r2.is(zero_reg)) {
1947 offset = shifted_branch_offset(L, false);
1948 b(offset);
1949 } else {
1950 sltu(scratch, r2, rs);
1951 offset = shifted_branch_offset(L, false);
1952 beq(scratch, zero_reg, offset);
1953 }
1954 break;
1955 default:
1956 UNREACHABLE();
1957 }
1958 } else {
1959 // Be careful to always use shifted_branch_offset only just before the
1960 // branch instruction, as the location will be remember for patching the
1961 // target.
jkummerow@chromium.org7bd87f02013-03-20 18:06:29 +00001962 BlockTrampolinePoolScope block_trampoline_pool(this);
lrn@chromium.org7516f052011-03-30 08:52:27 +00001963 switch (cond) {
1964 case cc_always:
1965 offset = shifted_branch_offset(L, false);
1966 b(offset);
1967 break;
1968 case eq:
yangguo@chromium.org80c42ed2011-08-31 09:03:56 +00001969 ASSERT(!scratch.is(rs));
lrn@chromium.org7516f052011-03-30 08:52:27 +00001970 r2 = scratch;
1971 li(r2, rt);
1972 offset = shifted_branch_offset(L, false);
1973 beq(rs, r2, offset);
1974 break;
1975 case ne:
yangguo@chromium.org80c42ed2011-08-31 09:03:56 +00001976 ASSERT(!scratch.is(rs));
lrn@chromium.org7516f052011-03-30 08:52:27 +00001977 r2 = scratch;
1978 li(r2, rt);
1979 offset = shifted_branch_offset(L, false);
1980 bne(rs, r2, offset);
1981 break;
karlklose@chromium.org83a47282011-05-11 11:54:09 +00001982 // Signed comparison.
lrn@chromium.org7516f052011-03-30 08:52:27 +00001983 case greater:
1984 if (rt.imm32_ == 0) {
1985 offset = shifted_branch_offset(L, false);
1986 bgtz(rs, offset);
1987 } else {
yangguo@chromium.org80c42ed2011-08-31 09:03:56 +00001988 ASSERT(!scratch.is(rs));
lrn@chromium.org7516f052011-03-30 08:52:27 +00001989 r2 = scratch;
1990 li(r2, rt);
1991 slt(scratch, r2, rs);
1992 offset = shifted_branch_offset(L, false);
1993 bne(scratch, zero_reg, offset);
1994 }
1995 break;
1996 case greater_equal:
1997 if (rt.imm32_ == 0) {
1998 offset = shifted_branch_offset(L, false);
1999 bgez(rs, offset);
2000 } else if (is_int16(rt.imm32_)) {
2001 slti(scratch, rs, rt.imm32_);
2002 offset = shifted_branch_offset(L, false);
2003 beq(scratch, zero_reg, offset);
2004 } else {
yangguo@chromium.org80c42ed2011-08-31 09:03:56 +00002005 ASSERT(!scratch.is(rs));
lrn@chromium.org7516f052011-03-30 08:52:27 +00002006 r2 = scratch;
2007 li(r2, rt);
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00002008 slt(scratch, rs, r2);
lrn@chromium.org7516f052011-03-30 08:52:27 +00002009 offset = shifted_branch_offset(L, false);
2010 beq(scratch, zero_reg, offset);
2011 }
2012 break;
2013 case less:
2014 if (rt.imm32_ == 0) {
2015 offset = shifted_branch_offset(L, false);
2016 bltz(rs, offset);
2017 } else if (is_int16(rt.imm32_)) {
2018 slti(scratch, rs, rt.imm32_);
2019 offset = shifted_branch_offset(L, false);
2020 bne(scratch, zero_reg, offset);
2021 } else {
yangguo@chromium.org80c42ed2011-08-31 09:03:56 +00002022 ASSERT(!scratch.is(rs));
lrn@chromium.org7516f052011-03-30 08:52:27 +00002023 r2 = scratch;
2024 li(r2, rt);
2025 slt(scratch, rs, r2);
2026 offset = shifted_branch_offset(L, false);
2027 bne(scratch, zero_reg, offset);
2028 }
2029 break;
2030 case less_equal:
2031 if (rt.imm32_ == 0) {
2032 offset = shifted_branch_offset(L, false);
2033 blez(rs, offset);
2034 } else {
yangguo@chromium.org80c42ed2011-08-31 09:03:56 +00002035 ASSERT(!scratch.is(rs));
lrn@chromium.org7516f052011-03-30 08:52:27 +00002036 r2 = scratch;
2037 li(r2, rt);
2038 slt(scratch, r2, rs);
2039 offset = shifted_branch_offset(L, false);
2040 beq(scratch, zero_reg, offset);
2041 }
2042 break;
2043 // Unsigned comparison.
2044 case Ugreater:
2045 if (rt.imm32_ == 0) {
2046 offset = shifted_branch_offset(L, false);
2047 bgtz(rs, offset);
2048 } else {
yangguo@chromium.org80c42ed2011-08-31 09:03:56 +00002049 ASSERT(!scratch.is(rs));
lrn@chromium.org7516f052011-03-30 08:52:27 +00002050 r2 = scratch;
2051 li(r2, rt);
2052 sltu(scratch, r2, rs);
2053 offset = shifted_branch_offset(L, false);
2054 bne(scratch, zero_reg, offset);
2055 }
2056 break;
2057 case Ugreater_equal:
2058 if (rt.imm32_ == 0) {
2059 offset = shifted_branch_offset(L, false);
2060 bgez(rs, offset);
2061 } else if (is_int16(rt.imm32_)) {
2062 sltiu(scratch, rs, rt.imm32_);
2063 offset = shifted_branch_offset(L, false);
2064 beq(scratch, zero_reg, offset);
2065 } else {
yangguo@chromium.org80c42ed2011-08-31 09:03:56 +00002066 ASSERT(!scratch.is(rs));
lrn@chromium.org7516f052011-03-30 08:52:27 +00002067 r2 = scratch;
2068 li(r2, rt);
2069 sltu(scratch, rs, r2);
2070 offset = shifted_branch_offset(L, false);
2071 beq(scratch, zero_reg, offset);
2072 }
2073 break;
2074 case Uless:
2075 if (rt.imm32_ == 0) {
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00002076 // No code needs to be emitted.
2077 return;
lrn@chromium.org7516f052011-03-30 08:52:27 +00002078 } else if (is_int16(rt.imm32_)) {
2079 sltiu(scratch, rs, rt.imm32_);
2080 offset = shifted_branch_offset(L, false);
2081 bne(scratch, zero_reg, offset);
2082 } else {
yangguo@chromium.org80c42ed2011-08-31 09:03:56 +00002083 ASSERT(!scratch.is(rs));
lrn@chromium.org7516f052011-03-30 08:52:27 +00002084 r2 = scratch;
2085 li(r2, rt);
2086 sltu(scratch, rs, r2);
2087 offset = shifted_branch_offset(L, false);
2088 bne(scratch, zero_reg, offset);
2089 }
2090 break;
2091 case Uless_equal:
2092 if (rt.imm32_ == 0) {
2093 offset = shifted_branch_offset(L, false);
2094 b(offset);
2095 } else {
yangguo@chromium.org80c42ed2011-08-31 09:03:56 +00002096 ASSERT(!scratch.is(rs));
lrn@chromium.org7516f052011-03-30 08:52:27 +00002097 r2 = scratch;
2098 li(r2, rt);
2099 sltu(scratch, r2, rs);
2100 offset = shifted_branch_offset(L, false);
2101 beq(scratch, zero_reg, offset);
2102 }
2103 break;
2104 default:
2105 UNREACHABLE();
2106 }
2107 }
2108 // Check that offset could actually hold on an int16_t.
2109 ASSERT(is_int16(offset));
2110 // Emit a nop in the branch delay slot if required.
2111 if (bdslot == PROTECT)
2112 nop();
2113}
2114
2115
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00002116void MacroAssembler::BranchAndLink(int16_t offset, BranchDelaySlot bdslot) {
2117 BranchAndLinkShort(offset, bdslot);
2118}
2119
2120
2121void MacroAssembler::BranchAndLink(int16_t offset, Condition cond, Register rs,
2122 const Operand& rt,
2123 BranchDelaySlot bdslot) {
2124 BranchAndLinkShort(offset, cond, rs, rt, bdslot);
2125}
2126
2127
2128void MacroAssembler::BranchAndLink(Label* L, BranchDelaySlot bdslot) {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00002129 if (L->is_bound()) {
2130 if (is_near(L)) {
2131 BranchAndLinkShort(L, bdslot);
2132 } else {
2133 Jalr(L, bdslot);
2134 }
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00002135 } else {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00002136 if (is_trampoline_emitted()) {
2137 Jalr(L, bdslot);
2138 } else {
2139 BranchAndLinkShort(L, bdslot);
2140 }
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00002141 }
2142}
2143
2144
2145void MacroAssembler::BranchAndLink(Label* L, Condition cond, Register rs,
2146 const Operand& rt,
2147 BranchDelaySlot bdslot) {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00002148 if (L->is_bound()) {
2149 if (is_near(L)) {
2150 BranchAndLinkShort(L, cond, rs, rt, bdslot);
2151 } else {
2152 Label skip;
2153 Condition neg_cond = NegateCondition(cond);
2154 BranchShort(&skip, neg_cond, rs, rt);
2155 Jalr(L, bdslot);
2156 bind(&skip);
2157 }
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00002158 } else {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00002159 if (is_trampoline_emitted()) {
2160 Label skip;
2161 Condition neg_cond = NegateCondition(cond);
2162 BranchShort(&skip, neg_cond, rs, rt);
2163 Jalr(L, bdslot);
2164 bind(&skip);
2165 } else {
2166 BranchAndLinkShort(L, cond, rs, rt, bdslot);
2167 }
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00002168 }
2169}
2170
2171
ager@chromium.org5c838252010-02-19 08:53:10 +00002172// We need to use a bgezal or bltzal, but they can't be used directly with the
2173// slt instructions. We could use sub or add instead but we would miss overflow
2174// cases, so we keep slt and add an intermediate third instruction.
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00002175void MacroAssembler::BranchAndLinkShort(int16_t offset,
2176 BranchDelaySlot bdslot) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00002177 bal(offset);
ager@chromium.org5c838252010-02-19 08:53:10 +00002178
lrn@chromium.org7516f052011-03-30 08:52:27 +00002179 // Emit a nop in the branch delay slot if required.
2180 if (bdslot == PROTECT)
2181 nop();
ager@chromium.org5c838252010-02-19 08:53:10 +00002182}
2183
2184
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00002185void MacroAssembler::BranchAndLinkShort(int16_t offset, Condition cond,
2186 Register rs, const Operand& rt,
2187 BranchDelaySlot bdslot) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00002188 BRANCH_ARGS_CHECK(cond, rs, rt);
ager@chromium.orgce5e87b2010-03-10 10:24:18 +00002189 Register r2 = no_reg;
lrn@chromium.org7516f052011-03-30 08:52:27 +00002190 Register scratch = at;
2191
ager@chromium.org5c838252010-02-19 08:53:10 +00002192 if (rt.is_reg()) {
2193 r2 = rt.rm_;
2194 } else if (cond != cc_always) {
2195 r2 = scratch;
2196 li(r2, rt);
2197 }
2198
jkummerow@chromium.org7bd87f02013-03-20 18:06:29 +00002199 {
2200 BlockTrampolinePoolScope block_trampoline_pool(this);
2201 switch (cond) {
2202 case cc_always:
2203 bal(offset);
2204 break;
2205 case eq:
2206 bne(rs, r2, 2);
2207 nop();
2208 bal(offset);
2209 break;
2210 case ne:
2211 beq(rs, r2, 2);
2212 nop();
2213 bal(offset);
2214 break;
ager@chromium.org5c838252010-02-19 08:53:10 +00002215
jkummerow@chromium.org7bd87f02013-03-20 18:06:29 +00002216 // Signed comparison.
2217 case greater:
2218 slt(scratch, r2, rs);
2219 addiu(scratch, scratch, -1);
2220 bgezal(scratch, offset);
2221 break;
2222 case greater_equal:
2223 slt(scratch, rs, r2);
2224 addiu(scratch, scratch, -1);
2225 bltzal(scratch, offset);
2226 break;
2227 case less:
2228 slt(scratch, rs, r2);
2229 addiu(scratch, scratch, -1);
2230 bgezal(scratch, offset);
2231 break;
2232 case less_equal:
2233 slt(scratch, r2, rs);
2234 addiu(scratch, scratch, -1);
2235 bltzal(scratch, offset);
2236 break;
ager@chromium.org5c838252010-02-19 08:53:10 +00002237
jkummerow@chromium.org7bd87f02013-03-20 18:06:29 +00002238 // Unsigned comparison.
2239 case Ugreater:
2240 sltu(scratch, r2, rs);
2241 addiu(scratch, scratch, -1);
2242 bgezal(scratch, offset);
2243 break;
2244 case Ugreater_equal:
2245 sltu(scratch, rs, r2);
2246 addiu(scratch, scratch, -1);
2247 bltzal(scratch, offset);
2248 break;
2249 case Uless:
2250 sltu(scratch, rs, r2);
2251 addiu(scratch, scratch, -1);
2252 bgezal(scratch, offset);
2253 break;
2254 case Uless_equal:
2255 sltu(scratch, r2, rs);
2256 addiu(scratch, scratch, -1);
2257 bltzal(scratch, offset);
2258 break;
ager@chromium.org5c838252010-02-19 08:53:10 +00002259
jkummerow@chromium.org7bd87f02013-03-20 18:06:29 +00002260 default:
2261 UNREACHABLE();
2262 }
ager@chromium.org5c838252010-02-19 08:53:10 +00002263 }
lrn@chromium.org7516f052011-03-30 08:52:27 +00002264 // Emit a nop in the branch delay slot if required.
2265 if (bdslot == PROTECT)
2266 nop();
2267}
2268
2269
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00002270void MacroAssembler::BranchAndLinkShort(Label* L, BranchDelaySlot bdslot) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00002271 bal(shifted_branch_offset(L, false));
2272
2273 // Emit a nop in the branch delay slot if required.
2274 if (bdslot == PROTECT)
2275 nop();
2276}
2277
2278
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00002279void MacroAssembler::BranchAndLinkShort(Label* L, Condition cond, Register rs,
2280 const Operand& rt,
2281 BranchDelaySlot bdslot) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00002282 BRANCH_ARGS_CHECK(cond, rs, rt);
2283
mstarzinger@chromium.orgf705b502013-04-04 11:38:09 +00002284 int32_t offset = 0;
lrn@chromium.org7516f052011-03-30 08:52:27 +00002285 Register r2 = no_reg;
2286 Register scratch = at;
2287 if (rt.is_reg()) {
2288 r2 = rt.rm_;
2289 } else if (cond != cc_always) {
2290 r2 = scratch;
2291 li(r2, rt);
2292 }
2293
jkummerow@chromium.org7bd87f02013-03-20 18:06:29 +00002294 {
2295 BlockTrampolinePoolScope block_trampoline_pool(this);
2296 switch (cond) {
2297 case cc_always:
2298 offset = shifted_branch_offset(L, false);
2299 bal(offset);
2300 break;
2301 case eq:
2302 bne(rs, r2, 2);
2303 nop();
2304 offset = shifted_branch_offset(L, false);
2305 bal(offset);
2306 break;
2307 case ne:
2308 beq(rs, r2, 2);
2309 nop();
2310 offset = shifted_branch_offset(L, false);
2311 bal(offset);
2312 break;
lrn@chromium.org7516f052011-03-30 08:52:27 +00002313
jkummerow@chromium.org7bd87f02013-03-20 18:06:29 +00002314 // Signed comparison.
2315 case greater:
2316 slt(scratch, r2, rs);
2317 addiu(scratch, scratch, -1);
2318 offset = shifted_branch_offset(L, false);
2319 bgezal(scratch, offset);
2320 break;
2321 case greater_equal:
2322 slt(scratch, rs, r2);
2323 addiu(scratch, scratch, -1);
2324 offset = shifted_branch_offset(L, false);
2325 bltzal(scratch, offset);
2326 break;
2327 case less:
2328 slt(scratch, rs, r2);
2329 addiu(scratch, scratch, -1);
2330 offset = shifted_branch_offset(L, false);
2331 bgezal(scratch, offset);
2332 break;
2333 case less_equal:
2334 slt(scratch, r2, rs);
2335 addiu(scratch, scratch, -1);
2336 offset = shifted_branch_offset(L, false);
2337 bltzal(scratch, offset);
2338 break;
lrn@chromium.org7516f052011-03-30 08:52:27 +00002339
jkummerow@chromium.org7bd87f02013-03-20 18:06:29 +00002340 // Unsigned comparison.
2341 case Ugreater:
2342 sltu(scratch, r2, rs);
2343 addiu(scratch, scratch, -1);
2344 offset = shifted_branch_offset(L, false);
2345 bgezal(scratch, offset);
2346 break;
2347 case Ugreater_equal:
2348 sltu(scratch, rs, r2);
2349 addiu(scratch, scratch, -1);
2350 offset = shifted_branch_offset(L, false);
2351 bltzal(scratch, offset);
2352 break;
2353 case Uless:
2354 sltu(scratch, rs, r2);
2355 addiu(scratch, scratch, -1);
2356 offset = shifted_branch_offset(L, false);
2357 bgezal(scratch, offset);
2358 break;
2359 case Uless_equal:
2360 sltu(scratch, r2, rs);
2361 addiu(scratch, scratch, -1);
2362 offset = shifted_branch_offset(L, false);
2363 bltzal(scratch, offset);
2364 break;
lrn@chromium.org7516f052011-03-30 08:52:27 +00002365
jkummerow@chromium.org7bd87f02013-03-20 18:06:29 +00002366 default:
2367 UNREACHABLE();
2368 }
lrn@chromium.org7516f052011-03-30 08:52:27 +00002369 }
lrn@chromium.org7516f052011-03-30 08:52:27 +00002370 // Check that offset could actually hold on an int16_t.
2371 ASSERT(is_int16(offset));
2372
2373 // Emit a nop in the branch delay slot if required.
2374 if (bdslot == PROTECT)
2375 nop();
2376}
2377
2378
sgjesse@chromium.org6db88712011-07-11 11:41:22 +00002379void MacroAssembler::Jump(Register target,
2380 Condition cond,
2381 Register rs,
2382 const Operand& rt,
2383 BranchDelaySlot bd) {
2384 BlockTrampolinePoolScope block_trampoline_pool(this);
2385 if (cond == cc_always) {
2386 jr(target);
2387 } else {
2388 BRANCH_ARGS_CHECK(cond, rs, rt);
2389 Branch(2, NegateCondition(cond), rs, rt);
2390 jr(target);
2391 }
2392 // Emit a nop in the branch delay slot if required.
2393 if (bd == PROTECT)
2394 nop();
2395}
2396
2397
2398void MacroAssembler::Jump(intptr_t target,
2399 RelocInfo::Mode rmode,
2400 Condition cond,
2401 Register rs,
2402 const Operand& rt,
2403 BranchDelaySlot bd) {
ulan@chromium.org6ff65142012-03-21 09:52:17 +00002404 Label skip;
2405 if (cond != cc_always) {
2406 Branch(USE_DELAY_SLOT, &skip, NegateCondition(cond), rs, rt);
2407 }
2408 // The first instruction of 'li' may be placed in the delay slot.
2409 // This is not an issue, t9 is expected to be clobbered anyway.
sgjesse@chromium.org6db88712011-07-11 11:41:22 +00002410 li(t9, Operand(target, rmode));
ulan@chromium.org6ff65142012-03-21 09:52:17 +00002411 Jump(t9, al, zero_reg, Operand(zero_reg), bd);
2412 bind(&skip);
sgjesse@chromium.org6db88712011-07-11 11:41:22 +00002413}
2414
2415
2416void MacroAssembler::Jump(Address target,
2417 RelocInfo::Mode rmode,
2418 Condition cond,
2419 Register rs,
2420 const Operand& rt,
2421 BranchDelaySlot bd) {
2422 ASSERT(!RelocInfo::IsCodeTarget(rmode));
2423 Jump(reinterpret_cast<intptr_t>(target), rmode, cond, rs, rt, bd);
2424}
2425
2426
2427void MacroAssembler::Jump(Handle<Code> code,
2428 RelocInfo::Mode rmode,
2429 Condition cond,
2430 Register rs,
2431 const Operand& rt,
2432 BranchDelaySlot bd) {
2433 ASSERT(RelocInfo::IsCodeTarget(rmode));
rossberg@chromium.org79e79022013-06-03 15:43:46 +00002434 AllowDeferredHandleDereference embedding_raw_address;
sgjesse@chromium.org6db88712011-07-11 11:41:22 +00002435 Jump(reinterpret_cast<intptr_t>(code.location()), rmode, cond, rs, rt, bd);
2436}
2437
2438
2439int MacroAssembler::CallSize(Register target,
2440 Condition cond,
2441 Register rs,
2442 const Operand& rt,
2443 BranchDelaySlot bd) {
2444 int size = 0;
2445
2446 if (cond == cc_always) {
2447 size += 1;
2448 } else {
2449 size += 3;
2450 }
2451
2452 if (bd == PROTECT)
2453 size += 1;
2454
2455 return size * kInstrSize;
2456}
2457
2458
2459// Note: To call gcc-compiled C code on mips, you must call thru t9.
2460void MacroAssembler::Call(Register target,
2461 Condition cond,
2462 Register rs,
2463 const Operand& rt,
2464 BranchDelaySlot bd) {
2465 BlockTrampolinePoolScope block_trampoline_pool(this);
2466 Label start;
2467 bind(&start);
2468 if (cond == cc_always) {
2469 jalr(target);
2470 } else {
2471 BRANCH_ARGS_CHECK(cond, rs, rt);
2472 Branch(2, NegateCondition(cond), rs, rt);
2473 jalr(target);
2474 }
2475 // Emit a nop in the branch delay slot if required.
2476 if (bd == PROTECT)
2477 nop();
2478
2479 ASSERT_EQ(CallSize(target, cond, rs, rt, bd),
2480 SizeOfCodeGeneratedSince(&start));
2481}
2482
2483
2484int MacroAssembler::CallSize(Address target,
2485 RelocInfo::Mode rmode,
2486 Condition cond,
2487 Register rs,
2488 const Operand& rt,
2489 BranchDelaySlot bd) {
2490 int size = CallSize(t9, cond, rs, rt, bd);
2491 return size + 2 * kInstrSize;
2492}
2493
2494
2495void MacroAssembler::Call(Address target,
2496 RelocInfo::Mode rmode,
2497 Condition cond,
2498 Register rs,
2499 const Operand& rt,
2500 BranchDelaySlot bd) {
2501 BlockTrampolinePoolScope block_trampoline_pool(this);
2502 Label start;
2503 bind(&start);
2504 int32_t target_int = reinterpret_cast<int32_t>(target);
2505 // Must record previous source positions before the
2506 // li() generates a new code target.
2507 positions_recorder()->WriteRecordedPositions();
danno@chromium.org88aa0582012-03-23 15:11:57 +00002508 li(t9, Operand(target_int, rmode), CONSTANT_SIZE);
sgjesse@chromium.org6db88712011-07-11 11:41:22 +00002509 Call(t9, cond, rs, rt, bd);
2510 ASSERT_EQ(CallSize(target, rmode, cond, rs, rt, bd),
2511 SizeOfCodeGeneratedSince(&start));
2512}
2513
2514
2515int MacroAssembler::CallSize(Handle<Code> code,
2516 RelocInfo::Mode rmode,
mstarzinger@chromium.org471f2f12012-08-10 14:46:33 +00002517 TypeFeedbackId ast_id,
sgjesse@chromium.org6db88712011-07-11 11:41:22 +00002518 Condition cond,
2519 Register rs,
2520 const Operand& rt,
2521 BranchDelaySlot bd) {
rossberg@chromium.org79e79022013-06-03 15:43:46 +00002522 AllowDeferredHandleDereference using_raw_address;
sgjesse@chromium.org6db88712011-07-11 11:41:22 +00002523 return CallSize(reinterpret_cast<Address>(code.location()),
2524 rmode, cond, rs, rt, bd);
2525}
2526
2527
2528void MacroAssembler::Call(Handle<Code> code,
2529 RelocInfo::Mode rmode,
mstarzinger@chromium.org471f2f12012-08-10 14:46:33 +00002530 TypeFeedbackId ast_id,
sgjesse@chromium.org6db88712011-07-11 11:41:22 +00002531 Condition cond,
2532 Register rs,
2533 const Operand& rt,
2534 BranchDelaySlot bd) {
2535 BlockTrampolinePoolScope block_trampoline_pool(this);
2536 Label start;
2537 bind(&start);
2538 ASSERT(RelocInfo::IsCodeTarget(rmode));
mstarzinger@chromium.org471f2f12012-08-10 14:46:33 +00002539 if (rmode == RelocInfo::CODE_TARGET && !ast_id.IsNone()) {
rossberg@chromium.org717967f2011-07-20 13:44:42 +00002540 SetRecordedAstId(ast_id);
sgjesse@chromium.org6db88712011-07-11 11:41:22 +00002541 rmode = RelocInfo::CODE_TARGET_WITH_ID;
2542 }
rossberg@chromium.org79e79022013-06-03 15:43:46 +00002543 AllowDeferredHandleDereference embedding_raw_address;
sgjesse@chromium.org6db88712011-07-11 11:41:22 +00002544 Call(reinterpret_cast<Address>(code.location()), rmode, cond, rs, rt, bd);
ulan@chromium.org6ff65142012-03-21 09:52:17 +00002545 ASSERT_EQ(CallSize(code, rmode, ast_id, cond, rs, rt, bd),
sgjesse@chromium.org6db88712011-07-11 11:41:22 +00002546 SizeOfCodeGeneratedSince(&start));
2547}
2548
2549
2550void MacroAssembler::Ret(Condition cond,
2551 Register rs,
2552 const Operand& rt,
2553 BranchDelaySlot bd) {
2554 Jump(ra, cond, rs, rt, bd);
2555}
2556
2557
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00002558void MacroAssembler::J(Label* L, BranchDelaySlot bdslot) {
2559 BlockTrampolinePoolScope block_trampoline_pool(this);
2560
2561 uint32_t imm28;
2562 imm28 = jump_address(L);
2563 imm28 &= kImm28Mask;
2564 { BlockGrowBufferScope block_buf_growth(this);
2565 // Buffer growth (and relocation) must be blocked for internal references
2566 // until associated instructions are emitted and available to be patched.
2567 RecordRelocInfo(RelocInfo::INTERNAL_REFERENCE);
2568 j(imm28);
2569 }
2570 // Emit a nop in the branch delay slot if required.
2571 if (bdslot == PROTECT)
2572 nop();
2573}
2574
2575
2576void MacroAssembler::Jr(Label* L, BranchDelaySlot bdslot) {
2577 BlockTrampolinePoolScope block_trampoline_pool(this);
2578
2579 uint32_t imm32;
2580 imm32 = jump_address(L);
2581 { BlockGrowBufferScope block_buf_growth(this);
2582 // Buffer growth (and relocation) must be blocked for internal references
2583 // until associated instructions are emitted and available to be patched.
2584 RecordRelocInfo(RelocInfo::INTERNAL_REFERENCE);
2585 lui(at, (imm32 & kHiMask) >> kLuiShift);
2586 ori(at, at, (imm32 & kImm16Mask));
2587 }
2588 jr(at);
2589
2590 // Emit a nop in the branch delay slot if required.
2591 if (bdslot == PROTECT)
2592 nop();
2593}
2594
2595
2596void MacroAssembler::Jalr(Label* L, BranchDelaySlot bdslot) {
2597 BlockTrampolinePoolScope block_trampoline_pool(this);
2598
2599 uint32_t imm32;
2600 imm32 = jump_address(L);
2601 { BlockGrowBufferScope block_buf_growth(this);
2602 // Buffer growth (and relocation) must be blocked for internal references
2603 // until associated instructions are emitted and available to be patched.
2604 RecordRelocInfo(RelocInfo::INTERNAL_REFERENCE);
2605 lui(at, (imm32 & kHiMask) >> kLuiShift);
2606 ori(at, at, (imm32 & kImm16Mask));
2607 }
2608 jalr(at);
2609
2610 // Emit a nop in the branch delay slot if required.
2611 if (bdslot == PROTECT)
2612 nop();
2613}
2614
mstarzinger@chromium.orge0e1b0d2013-07-08 08:38:06 +00002615
ulan@chromium.org6ff65142012-03-21 09:52:17 +00002616void MacroAssembler::DropAndRet(int drop) {
2617 Ret(USE_DELAY_SLOT);
2618 addiu(sp, sp, drop * kPointerSize);
2619}
vegorov@chromium.org3cf47312011-06-29 13:20:01 +00002620
lrn@chromium.org7516f052011-03-30 08:52:27 +00002621void MacroAssembler::DropAndRet(int drop,
2622 Condition cond,
2623 Register r1,
2624 const Operand& r2) {
ulan@chromium.org6ff65142012-03-21 09:52:17 +00002625 // Both Drop and Ret need to be conditional.
lrn@chromium.org7516f052011-03-30 08:52:27 +00002626 Label skip;
2627 if (cond != cc_always) {
2628 Branch(&skip, NegateCondition(cond), r1, r2);
2629 }
2630
2631 Drop(drop);
2632 Ret();
2633
2634 if (cond != cc_always) {
2635 bind(&skip);
2636 }
2637}
2638
2639
sgjesse@chromium.org6db88712011-07-11 11:41:22 +00002640void MacroAssembler::Drop(int count,
2641 Condition cond,
2642 Register reg,
2643 const Operand& op) {
2644 if (count <= 0) {
2645 return;
2646 }
2647
2648 Label skip;
2649
2650 if (cond != al) {
2651 Branch(&skip, NegateCondition(cond), reg, op);
2652 }
2653
2654 addiu(sp, sp, count * kPointerSize);
2655
2656 if (cond != al) {
2657 bind(&skip);
2658 }
2659}
2660
2661
2662
lrn@chromium.org7516f052011-03-30 08:52:27 +00002663void MacroAssembler::Swap(Register reg1,
2664 Register reg2,
2665 Register scratch) {
2666 if (scratch.is(no_reg)) {
2667 Xor(reg1, reg1, Operand(reg2));
2668 Xor(reg2, reg2, Operand(reg1));
2669 Xor(reg1, reg1, Operand(reg2));
2670 } else {
2671 mov(scratch, reg1);
2672 mov(reg1, reg2);
2673 mov(reg2, scratch);
2674 }
ager@chromium.org5c838252010-02-19 08:53:10 +00002675}
2676
2677
2678void MacroAssembler::Call(Label* target) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00002679 BranchAndLink(target);
2680}
2681
2682
svenpanne@chromium.org6d786c92011-06-15 10:58:27 +00002683void MacroAssembler::Push(Handle<Object> handle) {
2684 li(at, Operand(handle));
2685 push(at);
2686}
2687
2688
ager@chromium.orgce5e87b2010-03-10 10:24:18 +00002689#ifdef ENABLE_DEBUGGER_SUPPORT
ager@chromium.orgce5e87b2010-03-10 10:24:18 +00002690
lrn@chromium.org7516f052011-03-30 08:52:27 +00002691void MacroAssembler::DebugBreak() {
ulan@chromium.org6ff65142012-03-21 09:52:17 +00002692 PrepareCEntryArgs(0);
2693 PrepareCEntryFunction(ExternalReference(Runtime::kDebugBreak, isolate()));
lrn@chromium.org7516f052011-03-30 08:52:27 +00002694 CEntryStub ces(1);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00002695 ASSERT(AllowThisStubCall(&ces));
hpayer@chromium.org8432c912013-02-28 15:55:26 +00002696 Call(ces.GetCode(isolate()), RelocInfo::DEBUG_BREAK);
lrn@chromium.org7516f052011-03-30 08:52:27 +00002697}
2698
2699#endif // ENABLE_DEBUGGER_SUPPORT
ager@chromium.orgce5e87b2010-03-10 10:24:18 +00002700
2701
ager@chromium.org5c838252010-02-19 08:53:10 +00002702// ---------------------------------------------------------------------------
karlklose@chromium.org83a47282011-05-11 11:54:09 +00002703// Exception handling.
ager@chromium.org5c838252010-02-19 08:53:10 +00002704
yangguo@chromium.org78d1ad42012-02-09 13:53:47 +00002705void MacroAssembler::PushTryHandler(StackHandler::Kind kind,
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002706 int handler_index) {
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00002707 // Adjust this code if not the case.
danno@chromium.orgb6451162011-08-17 14:33:23 +00002708 STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize);
2709 STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0 * kPointerSize);
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002710 STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize);
2711 STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize);
2712 STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize);
2713 STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize);
danno@chromium.orgb6451162011-08-17 14:33:23 +00002714
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002715 // For the JSEntry handler, we must preserve a0-a3 and s0.
2716 // t1-t3 are available. We will build up the handler from the bottom by
yangguo@chromium.org78d1ad42012-02-09 13:53:47 +00002717 // pushing on the stack.
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002718 // Set up the code object (t1) and the state (t2) for pushing.
yangguo@chromium.org78d1ad42012-02-09 13:53:47 +00002719 unsigned state =
2720 StackHandler::IndexField::encode(handler_index) |
2721 StackHandler::KindField::encode(kind);
danno@chromium.org88aa0582012-03-23 15:11:57 +00002722 li(t1, Operand(CodeObject()), CONSTANT_SIZE);
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002723 li(t2, Operand(state));
2724
2725 // Push the frame pointer, context, state, and code object.
yangguo@chromium.org78d1ad42012-02-09 13:53:47 +00002726 if (kind == StackHandler::JS_ENTRY) {
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002727 ASSERT_EQ(Smi::FromInt(0), 0);
2728 // The second zero_reg indicates no context.
2729 // The first zero_reg is the NULL frame pointer.
2730 // The operands are reversed to match the order of MultiPush/Pop.
2731 Push(zero_reg, zero_reg, t2, t1);
yangguo@chromium.org78d1ad42012-02-09 13:53:47 +00002732 } else {
2733 MultiPush(t1.bit() | t2.bit() | cp.bit() | fp.bit());
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002734 }
2735
2736 // Link the current handler as the next handler.
2737 li(t2, Operand(ExternalReference(Isolate::kHandlerAddress, isolate())));
2738 lw(t1, MemOperand(t2));
2739 push(t1);
2740 // Set this new handler as the current one.
2741 sw(sp, MemOperand(t2));
ager@chromium.org5c838252010-02-19 08:53:10 +00002742}
2743
2744
2745void MacroAssembler::PopTryHandler() {
danno@chromium.orgb6451162011-08-17 14:33:23 +00002746 STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0);
lrn@chromium.org7516f052011-03-30 08:52:27 +00002747 pop(a1);
2748 Addu(sp, sp, Operand(StackHandlerConstants::kSize - kPointerSize));
kmillikin@chromium.org83e16822011-09-13 08:21:47 +00002749 li(at, Operand(ExternalReference(Isolate::kHandlerAddress, isolate())));
lrn@chromium.org7516f052011-03-30 08:52:27 +00002750 sw(a1, MemOperand(at));
ager@chromium.org5c838252010-02-19 08:53:10 +00002751}
2752
2753
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002754void MacroAssembler::JumpToHandlerEntry() {
2755 // Compute the handler entry address and jump to it. The handler table is
2756 // a fixed array of (smi-tagged) code offsets.
2757 // v0 = exception, a1 = code object, a2 = state.
2758 lw(a3, FieldMemOperand(a1, Code::kHandlerTableOffset)); // Handler table.
2759 Addu(a3, a3, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
2760 srl(a2, a2, StackHandler::kKindWidth); // Handler index.
2761 sll(a2, a2, kPointerSizeLog2);
2762 Addu(a2, a3, a2);
2763 lw(a2, MemOperand(a2)); // Smi-tagged offset.
2764 Addu(a1, a1, Operand(Code::kHeaderSize - kHeapObjectTag)); // Code start.
2765 sra(t9, a2, kSmiTagSize);
2766 Addu(t9, t9, a1);
2767 Jump(t9); // Jump.
2768}
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00002769
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002770
2771void MacroAssembler::Throw(Register value) {
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00002772 // Adjust this code if not the case.
danno@chromium.orgb6451162011-08-17 14:33:23 +00002773 STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize);
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002774 STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0);
2775 STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize);
2776 STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize);
2777 STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize);
2778 STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize);
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00002779
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002780 // The exception is expected in v0.
2781 Move(v0, value);
2782
2783 // Drop the stack pointer to the top of the top handler.
kmillikin@chromium.org83e16822011-09-13 08:21:47 +00002784 li(a3, Operand(ExternalReference(Isolate::kHandlerAddress,
danno@chromium.orgb6451162011-08-17 14:33:23 +00002785 isolate())));
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00002786 lw(sp, MemOperand(a3));
2787
danno@chromium.orgb6451162011-08-17 14:33:23 +00002788 // Restore the next handler.
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00002789 pop(a2);
2790 sw(a2, MemOperand(a3));
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00002791
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002792 // Get the code object (a1) and state (a2). Restore the context and frame
2793 // pointer.
2794 MultiPop(a1.bit() | a2.bit() | cp.bit() | fp.bit());
danno@chromium.orgb6451162011-08-17 14:33:23 +00002795
2796 // If the handler is a JS frame, restore the context to the frame.
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002797 // (kind == ENTRY) == (fp == 0) == (cp == 0), so we could test either fp
2798 // or cp.
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00002799 Label done;
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002800 Branch(&done, eq, cp, Operand(zero_reg));
danno@chromium.orgb6451162011-08-17 14:33:23 +00002801 sw(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00002802 bind(&done);
2803
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002804 JumpToHandlerEntry();
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00002805}
2806
2807
ulan@chromium.org65a89c22012-02-14 11:46:07 +00002808void MacroAssembler::ThrowUncatchable(Register value) {
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00002809 // Adjust this code if not the case.
danno@chromium.orgb6451162011-08-17 14:33:23 +00002810 STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize);
2811 STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0 * kPointerSize);
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002812 STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize);
2813 STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize);
2814 STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize);
2815 STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize);
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00002816
danno@chromium.orgc612e022011-11-10 11:38:15 +00002817 // The exception is expected in v0.
ulan@chromium.org65a89c22012-02-14 11:46:07 +00002818 if (!value.is(v0)) {
danno@chromium.orgc612e022011-11-10 11:38:15 +00002819 mov(v0, value);
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00002820 }
danno@chromium.orgc612e022011-11-10 11:38:15 +00002821 // Drop the stack pointer to the top of the top stack handler.
2822 li(a3, Operand(ExternalReference(Isolate::kHandlerAddress, isolate())));
2823 lw(sp, MemOperand(a3));
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00002824
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002825 // Unwind the handlers until the ENTRY handler is found.
danno@chromium.orgc612e022011-11-10 11:38:15 +00002826 Label fetch_next, check_kind;
2827 jmp(&check_kind);
2828 bind(&fetch_next);
2829 lw(sp, MemOperand(sp, StackHandlerConstants::kNextOffset));
2830
2831 bind(&check_kind);
yangguo@chromium.org78d1ad42012-02-09 13:53:47 +00002832 STATIC_ASSERT(StackHandler::JS_ENTRY == 0);
danno@chromium.orgc612e022011-11-10 11:38:15 +00002833 lw(a2, MemOperand(sp, StackHandlerConstants::kStateOffset));
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002834 And(a2, a2, Operand(StackHandler::KindField::kMask));
2835 Branch(&fetch_next, ne, a2, Operand(zero_reg));
danno@chromium.orgc612e022011-11-10 11:38:15 +00002836
2837 // Set the top handler address to next handler past the top ENTRY handler.
2838 pop(a2);
2839 sw(a2, MemOperand(a3));
2840
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002841 // Get the code object (a1) and state (a2). Clear the context and frame
2842 // pointer (0 was saved in the handler).
2843 MultiPop(a1.bit() | a2.bit() | cp.bit() | fp.bit());
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00002844
mstarzinger@chromium.orgf8c6bd52011-11-23 12:13:52 +00002845 JumpToHandlerEntry();
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00002846}
2847
2848
jkummerow@chromium.org4c54a2a2013-03-19 17:51:30 +00002849void MacroAssembler::Allocate(int object_size,
2850 Register result,
2851 Register scratch1,
2852 Register scratch2,
2853 Label* gc_required,
2854 AllocationFlags flags) {
machenbach@chromium.orgef9a2b92014-01-24 01:05:19 +00002855 ASSERT(object_size <= Page::kMaxRegularHeapObjectSize);
lrn@chromium.org7516f052011-03-30 08:52:27 +00002856 if (!FLAG_inline_new) {
karlklose@chromium.org83a47282011-05-11 11:54:09 +00002857 if (emit_debug_code()) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00002858 // Trash the registers to simulate an allocation failure.
2859 li(result, 0x7091);
2860 li(scratch1, 0x7191);
2861 li(scratch2, 0x7291);
2862 }
2863 jmp(gc_required);
2864 return;
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00002865 }
2866
lrn@chromium.org7516f052011-03-30 08:52:27 +00002867 ASSERT(!result.is(scratch1));
2868 ASSERT(!result.is(scratch2));
2869 ASSERT(!scratch1.is(scratch2));
2870 ASSERT(!scratch1.is(t9));
2871 ASSERT(!scratch2.is(t9));
2872 ASSERT(!result.is(t9));
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00002873
lrn@chromium.org7516f052011-03-30 08:52:27 +00002874 // Make object size into bytes.
2875 if ((flags & SIZE_IN_WORDS) != 0) {
2876 object_size *= kPointerSize;
2877 }
2878 ASSERT_EQ(0, object_size & kObjectAlignmentMask);
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00002879
lrn@chromium.org7516f052011-03-30 08:52:27 +00002880 // Check relative positions of allocation top and limit addresses.
2881 // ARM adds additional checks to make sure the ldm instruction can be
2882 // used. On MIPS we don't have ldm so we don't need additional checks either.
jkummerow@chromium.org4c54a2a2013-03-19 17:51:30 +00002883 ExternalReference allocation_top =
2884 AllocationUtils::GetAllocationTopReference(isolate(), flags);
2885 ExternalReference allocation_limit =
2886 AllocationUtils::GetAllocationLimitReference(isolate(), flags);
2887
lrn@chromium.org7516f052011-03-30 08:52:27 +00002888 intptr_t top =
jkummerow@chromium.org4c54a2a2013-03-19 17:51:30 +00002889 reinterpret_cast<intptr_t>(allocation_top.address());
lrn@chromium.org7516f052011-03-30 08:52:27 +00002890 intptr_t limit =
jkummerow@chromium.org4c54a2a2013-03-19 17:51:30 +00002891 reinterpret_cast<intptr_t>(allocation_limit.address());
lrn@chromium.org7516f052011-03-30 08:52:27 +00002892 ASSERT((limit - top) == kPointerSize);
2893
2894 // Set up allocation top address and object size registers.
2895 Register topaddr = scratch1;
jkummerow@chromium.org4c54a2a2013-03-19 17:51:30 +00002896 li(topaddr, Operand(allocation_top));
lrn@chromium.org7516f052011-03-30 08:52:27 +00002897
2898 // This code stores a temporary value in t9.
2899 if ((flags & RESULT_CONTAINS_TOP) == 0) {
2900 // Load allocation top into result and allocation limit into t9.
2901 lw(result, MemOperand(topaddr));
2902 lw(t9, MemOperand(topaddr, kPointerSize));
2903 } else {
karlklose@chromium.org83a47282011-05-11 11:54:09 +00002904 if (emit_debug_code()) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00002905 // Assert that result actually contains top on entry. t9 is used
2906 // immediately below so this use of t9 does not cause difference with
2907 // respect to register content between debug and release mode.
2908 lw(t9, MemOperand(topaddr));
danno@chromium.org59400602013-08-13 17:09:37 +00002909 Check(eq, kUnexpectedAllocationTop, result, Operand(t9));
lrn@chromium.org7516f052011-03-30 08:52:27 +00002910 }
2911 // Load allocation limit into t9. Result already contains allocation top.
2912 lw(t9, MemOperand(topaddr, limit - top));
2913 }
2914
danno@chromium.org59400602013-08-13 17:09:37 +00002915 if ((flags & DOUBLE_ALIGNMENT) != 0) {
2916 // Align the next allocation. Storing the filler map without checking top is
mstarzinger@chromium.orgf6fe1182013-08-19 18:11:56 +00002917 // safe in new-space because the limit of the heap is aligned there.
danno@chromium.org59400602013-08-13 17:09:37 +00002918 ASSERT((flags & PRETENURE_OLD_POINTER_SPACE) == 0);
2919 ASSERT(kPointerAlignment * 2 == kDoubleAlignment);
2920 And(scratch2, result, Operand(kDoubleAlignmentMask));
2921 Label aligned;
2922 Branch(&aligned, eq, scratch2, Operand(zero_reg));
mstarzinger@chromium.orgf6fe1182013-08-19 18:11:56 +00002923 if ((flags & PRETENURE_OLD_DATA_SPACE) != 0) {
2924 Branch(gc_required, Ugreater_equal, result, Operand(t9));
2925 }
danno@chromium.org59400602013-08-13 17:09:37 +00002926 li(scratch2, Operand(isolate()->factory()->one_pointer_filler_map()));
2927 sw(scratch2, MemOperand(result));
2928 Addu(result, result, Operand(kDoubleSize / 2));
2929 bind(&aligned);
2930 }
2931
lrn@chromium.org7516f052011-03-30 08:52:27 +00002932 // Calculate new top and bail out if new space is exhausted. Use result
2933 // to calculate the new top.
danno@chromium.org59400602013-08-13 17:09:37 +00002934 Addu(scratch2, result, Operand(object_size));
lrn@chromium.org7516f052011-03-30 08:52:27 +00002935 Branch(gc_required, Ugreater, scratch2, Operand(t9));
2936 sw(scratch2, MemOperand(topaddr));
2937
2938 // Tag object if requested.
2939 if ((flags & TAG_OBJECT) != 0) {
2940 Addu(result, result, Operand(kHeapObjectTag));
2941 }
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00002942}
2943
2944
mstarzinger@chromium.orgf705b502013-04-04 11:38:09 +00002945void MacroAssembler::Allocate(Register object_size,
2946 Register result,
2947 Register scratch1,
2948 Register scratch2,
2949 Label* gc_required,
2950 AllocationFlags flags) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00002951 if (!FLAG_inline_new) {
karlklose@chromium.org83a47282011-05-11 11:54:09 +00002952 if (emit_debug_code()) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00002953 // Trash the registers to simulate an allocation failure.
2954 li(result, 0x7091);
2955 li(scratch1, 0x7191);
2956 li(scratch2, 0x7291);
2957 }
2958 jmp(gc_required);
2959 return;
2960 }
2961
2962 ASSERT(!result.is(scratch1));
2963 ASSERT(!result.is(scratch2));
2964 ASSERT(!scratch1.is(scratch2));
erik.corry@gmail.com394dbcf2011-10-27 07:38:48 +00002965 ASSERT(!object_size.is(t9));
lrn@chromium.org7516f052011-03-30 08:52:27 +00002966 ASSERT(!scratch1.is(t9) && !scratch2.is(t9) && !result.is(t9));
2967
2968 // Check relative positions of allocation top and limit addresses.
2969 // ARM adds additional checks to make sure the ldm instruction can be
2970 // used. On MIPS we don't have ldm so we don't need additional checks either.
mstarzinger@chromium.orgf705b502013-04-04 11:38:09 +00002971 ExternalReference allocation_top =
2972 AllocationUtils::GetAllocationTopReference(isolate(), flags);
2973 ExternalReference allocation_limit =
2974 AllocationUtils::GetAllocationLimitReference(isolate(), flags);
lrn@chromium.org7516f052011-03-30 08:52:27 +00002975 intptr_t top =
mstarzinger@chromium.orgf705b502013-04-04 11:38:09 +00002976 reinterpret_cast<intptr_t>(allocation_top.address());
lrn@chromium.org7516f052011-03-30 08:52:27 +00002977 intptr_t limit =
mstarzinger@chromium.orgf705b502013-04-04 11:38:09 +00002978 reinterpret_cast<intptr_t>(allocation_limit.address());
lrn@chromium.org7516f052011-03-30 08:52:27 +00002979 ASSERT((limit - top) == kPointerSize);
2980
2981 // Set up allocation top address and object size registers.
2982 Register topaddr = scratch1;
mstarzinger@chromium.orgf705b502013-04-04 11:38:09 +00002983 li(topaddr, Operand(allocation_top));
lrn@chromium.org7516f052011-03-30 08:52:27 +00002984
2985 // This code stores a temporary value in t9.
2986 if ((flags & RESULT_CONTAINS_TOP) == 0) {
2987 // Load allocation top into result and allocation limit into t9.
2988 lw(result, MemOperand(topaddr));
2989 lw(t9, MemOperand(topaddr, kPointerSize));
2990 } else {
karlklose@chromium.org83a47282011-05-11 11:54:09 +00002991 if (emit_debug_code()) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00002992 // Assert that result actually contains top on entry. t9 is used
2993 // immediately below so this use of t9 does not cause difference with
2994 // respect to register content between debug and release mode.
2995 lw(t9, MemOperand(topaddr));
danno@chromium.org59400602013-08-13 17:09:37 +00002996 Check(eq, kUnexpectedAllocationTop, result, Operand(t9));
lrn@chromium.org7516f052011-03-30 08:52:27 +00002997 }
2998 // Load allocation limit into t9. Result already contains allocation top.
2999 lw(t9, MemOperand(topaddr, limit - top));
3000 }
3001
danno@chromium.org59400602013-08-13 17:09:37 +00003002 if ((flags & DOUBLE_ALIGNMENT) != 0) {
3003 // Align the next allocation. Storing the filler map without checking top is
mstarzinger@chromium.orgf6fe1182013-08-19 18:11:56 +00003004 // safe in new-space because the limit of the heap is aligned there.
danno@chromium.org59400602013-08-13 17:09:37 +00003005 ASSERT((flags & PRETENURE_OLD_POINTER_SPACE) == 0);
3006 ASSERT(kPointerAlignment * 2 == kDoubleAlignment);
3007 And(scratch2, result, Operand(kDoubleAlignmentMask));
3008 Label aligned;
3009 Branch(&aligned, eq, scratch2, Operand(zero_reg));
mstarzinger@chromium.orgf6fe1182013-08-19 18:11:56 +00003010 if ((flags & PRETENURE_OLD_DATA_SPACE) != 0) {
3011 Branch(gc_required, Ugreater_equal, result, Operand(t9));
3012 }
danno@chromium.org59400602013-08-13 17:09:37 +00003013 li(scratch2, Operand(isolate()->factory()->one_pointer_filler_map()));
3014 sw(scratch2, MemOperand(result));
3015 Addu(result, result, Operand(kDoubleSize / 2));
3016 bind(&aligned);
3017 }
3018
lrn@chromium.org7516f052011-03-30 08:52:27 +00003019 // Calculate new top and bail out if new space is exhausted. Use result
3020 // to calculate the new top. Object size may be in words so a shift is
3021 // required to get the number of bytes.
3022 if ((flags & SIZE_IN_WORDS) != 0) {
3023 sll(scratch2, object_size, kPointerSizeLog2);
3024 Addu(scratch2, result, scratch2);
3025 } else {
3026 Addu(scratch2, result, Operand(object_size));
3027 }
3028 Branch(gc_required, Ugreater, scratch2, Operand(t9));
3029
3030 // Update allocation top. result temporarily holds the new top.
karlklose@chromium.org83a47282011-05-11 11:54:09 +00003031 if (emit_debug_code()) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00003032 And(t9, scratch2, Operand(kObjectAlignmentMask));
danno@chromium.org59400602013-08-13 17:09:37 +00003033 Check(eq, kUnalignedAllocationInNewSpace, t9, Operand(zero_reg));
lrn@chromium.org7516f052011-03-30 08:52:27 +00003034 }
3035 sw(scratch2, MemOperand(topaddr));
3036
3037 // Tag object if requested.
3038 if ((flags & TAG_OBJECT) != 0) {
3039 Addu(result, result, Operand(kHeapObjectTag));
3040 }
3041}
3042
3043
3044void MacroAssembler::UndoAllocationInNewSpace(Register object,
3045 Register scratch) {
3046 ExternalReference new_space_allocation_top =
3047 ExternalReference::new_space_allocation_top_address(isolate());
3048
3049 // Make sure the object has no tag before resetting top.
3050 And(object, object, Operand(~kHeapObjectTagMask));
3051#ifdef DEBUG
3052 // Check that the object un-allocated is below the current top.
3053 li(scratch, Operand(new_space_allocation_top));
3054 lw(scratch, MemOperand(scratch));
danno@chromium.org59400602013-08-13 17:09:37 +00003055 Check(less, kUndoAllocationOfNonAllocatedMemory,
lrn@chromium.org7516f052011-03-30 08:52:27 +00003056 object, Operand(scratch));
3057#endif
3058 // Write the address of the object to un-allocate as the current top.
3059 li(scratch, Operand(new_space_allocation_top));
3060 sw(object, MemOperand(scratch));
3061}
3062
3063
3064void MacroAssembler::AllocateTwoByteString(Register result,
3065 Register length,
3066 Register scratch1,
3067 Register scratch2,
3068 Register scratch3,
3069 Label* gc_required) {
3070 // Calculate the number of bytes needed for the characters in the string while
3071 // observing object alignment.
3072 ASSERT((SeqTwoByteString::kHeaderSize & kObjectAlignmentMask) == 0);
3073 sll(scratch1, length, 1); // Length in bytes, not chars.
3074 addiu(scratch1, scratch1,
3075 kObjectAlignmentMask + SeqTwoByteString::kHeaderSize);
3076 And(scratch1, scratch1, Operand(~kObjectAlignmentMask));
3077
3078 // Allocate two-byte string in new space.
mstarzinger@chromium.orgf705b502013-04-04 11:38:09 +00003079 Allocate(scratch1,
3080 result,
3081 scratch2,
3082 scratch3,
3083 gc_required,
3084 TAG_OBJECT);
lrn@chromium.org7516f052011-03-30 08:52:27 +00003085
3086 // Set the map, length and hash field.
3087 InitializeNewString(result,
3088 length,
3089 Heap::kStringMapRootIndex,
3090 scratch1,
3091 scratch2);
3092}
3093
3094
3095void MacroAssembler::AllocateAsciiString(Register result,
3096 Register length,
3097 Register scratch1,
3098 Register scratch2,
3099 Register scratch3,
3100 Label* gc_required) {
3101 // Calculate the number of bytes needed for the characters in the string
3102 // while observing object alignment.
yangguo@chromium.orgfb377212012-11-16 14:43:43 +00003103 ASSERT((SeqOneByteString::kHeaderSize & kObjectAlignmentMask) == 0);
lrn@chromium.org7516f052011-03-30 08:52:27 +00003104 ASSERT(kCharSize == 1);
yangguo@chromium.orgfb377212012-11-16 14:43:43 +00003105 addiu(scratch1, length, kObjectAlignmentMask + SeqOneByteString::kHeaderSize);
lrn@chromium.org7516f052011-03-30 08:52:27 +00003106 And(scratch1, scratch1, Operand(~kObjectAlignmentMask));
3107
3108 // Allocate ASCII string in new space.
mstarzinger@chromium.orgf705b502013-04-04 11:38:09 +00003109 Allocate(scratch1,
3110 result,
3111 scratch2,
3112 scratch3,
3113 gc_required,
3114 TAG_OBJECT);
lrn@chromium.org7516f052011-03-30 08:52:27 +00003115
3116 // Set the map, length and hash field.
3117 InitializeNewString(result,
3118 length,
3119 Heap::kAsciiStringMapRootIndex,
3120 scratch1,
3121 scratch2);
3122}
3123
3124
3125void MacroAssembler::AllocateTwoByteConsString(Register result,
3126 Register length,
3127 Register scratch1,
3128 Register scratch2,
3129 Label* gc_required) {
jkummerow@chromium.org4c54a2a2013-03-19 17:51:30 +00003130 Allocate(ConsString::kSize, result, scratch1, scratch2, gc_required,
3131 TAG_OBJECT);
lrn@chromium.org7516f052011-03-30 08:52:27 +00003132 InitializeNewString(result,
3133 length,
3134 Heap::kConsStringMapRootIndex,
3135 scratch1,
3136 scratch2);
3137}
3138
3139
3140void MacroAssembler::AllocateAsciiConsString(Register result,
3141 Register length,
3142 Register scratch1,
3143 Register scratch2,
3144 Label* gc_required) {
ulan@chromium.org57ff8812013-05-10 08:16:55 +00003145 Label allocate_new_space, install_map;
3146 AllocationFlags flags = TAG_OBJECT;
3147
3148 ExternalReference high_promotion_mode = ExternalReference::
3149 new_space_high_promotion_mode_active_address(isolate());
3150 li(scratch1, Operand(high_promotion_mode));
3151 lw(scratch1, MemOperand(scratch1, 0));
3152 Branch(&allocate_new_space, eq, scratch1, Operand(zero_reg));
3153
3154 Allocate(ConsString::kSize,
3155 result,
3156 scratch1,
3157 scratch2,
3158 gc_required,
3159 static_cast<AllocationFlags>(flags | PRETENURE_OLD_POINTER_SPACE));
3160
3161 jmp(&install_map);
3162
3163 bind(&allocate_new_space);
3164 Allocate(ConsString::kSize,
3165 result,
3166 scratch1,
3167 scratch2,
3168 gc_required,
3169 flags);
3170
3171 bind(&install_map);
3172
lrn@chromium.org7516f052011-03-30 08:52:27 +00003173 InitializeNewString(result,
3174 length,
3175 Heap::kConsAsciiStringMapRootIndex,
3176 scratch1,
3177 scratch2);
3178}
3179
3180
fschneider@chromium.org1805e212011-09-05 10:49:12 +00003181void MacroAssembler::AllocateTwoByteSlicedString(Register result,
3182 Register length,
3183 Register scratch1,
3184 Register scratch2,
3185 Label* gc_required) {
jkummerow@chromium.org4c54a2a2013-03-19 17:51:30 +00003186 Allocate(SlicedString::kSize, result, scratch1, scratch2, gc_required,
3187 TAG_OBJECT);
fschneider@chromium.org1805e212011-09-05 10:49:12 +00003188
3189 InitializeNewString(result,
3190 length,
3191 Heap::kSlicedStringMapRootIndex,
3192 scratch1,
3193 scratch2);
3194}
3195
3196
3197void MacroAssembler::AllocateAsciiSlicedString(Register result,
3198 Register length,
3199 Register scratch1,
3200 Register scratch2,
3201 Label* gc_required) {
jkummerow@chromium.org4c54a2a2013-03-19 17:51:30 +00003202 Allocate(SlicedString::kSize, result, scratch1, scratch2, gc_required,
3203 TAG_OBJECT);
fschneider@chromium.org1805e212011-09-05 10:49:12 +00003204
3205 InitializeNewString(result,
3206 length,
3207 Heap::kSlicedAsciiStringMapRootIndex,
3208 scratch1,
3209 scratch2);
3210}
3211
3212
mstarzinger@chromium.org1510d582013-06-28 14:00:48 +00003213void MacroAssembler::JumpIfNotUniqueName(Register reg,
3214 Label* not_unique_name) {
jkummerow@chromium.orgba72ec82013-07-22 09:21:20 +00003215 STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0);
3216 Label succeed;
3217 And(at, reg, Operand(kIsNotStringMask | kIsNotInternalizedMask));
3218 Branch(&succeed, eq, at, Operand(zero_reg));
3219 Branch(not_unique_name, ne, reg, Operand(SYMBOL_TYPE));
3220
3221 bind(&succeed);
mstarzinger@chromium.org1510d582013-06-28 14:00:48 +00003222}
3223
3224
lrn@chromium.org7516f052011-03-30 08:52:27 +00003225// Allocates a heap number or jumps to the label if the young space is full and
3226// a scavenge is needed.
3227void MacroAssembler::AllocateHeapNumber(Register result,
3228 Register scratch1,
3229 Register scratch2,
3230 Register heap_number_map,
svenpanne@chromium.org83130cf2012-11-30 10:13:25 +00003231 Label* need_gc,
3232 TaggingMode tagging_mode) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00003233 // Allocate an object in the heap for the heap number and tag it as a heap
3234 // object.
jkummerow@chromium.org4c54a2a2013-03-19 17:51:30 +00003235 Allocate(HeapNumber::kSize, result, scratch1, scratch2, need_gc,
3236 tagging_mode == TAG_RESULT ? TAG_OBJECT : NO_ALLOCATION_FLAGS);
lrn@chromium.org7516f052011-03-30 08:52:27 +00003237
3238 // Store heap number map in the allocated object.
mstarzinger@chromium.org1f410f92013-08-29 08:13:16 +00003239 AssertIsRoot(heap_number_map, Heap::kHeapNumberMapRootIndex);
svenpanne@chromium.org83130cf2012-11-30 10:13:25 +00003240 if (tagging_mode == TAG_RESULT) {
3241 sw(heap_number_map, FieldMemOperand(result, HeapObject::kMapOffset));
3242 } else {
3243 sw(heap_number_map, MemOperand(result, HeapObject::kMapOffset));
3244 }
lrn@chromium.org7516f052011-03-30 08:52:27 +00003245}
3246
3247
3248void MacroAssembler::AllocateHeapNumberWithValue(Register result,
3249 FPURegister value,
3250 Register scratch1,
3251 Register scratch2,
3252 Label* gc_required) {
ager@chromium.org04921a82011-06-27 13:21:41 +00003253 LoadRoot(t8, Heap::kHeapNumberMapRootIndex);
3254 AllocateHeapNumber(result, scratch1, scratch2, t8, gc_required);
lrn@chromium.org7516f052011-03-30 08:52:27 +00003255 sdc1(value, FieldMemOperand(result, HeapNumber::kValueOffset));
3256}
3257
3258
3259// Copies a fixed number of fields of heap objects from src to dst.
3260void MacroAssembler::CopyFields(Register dst,
3261 Register src,
3262 RegList temps,
3263 int field_count) {
3264 ASSERT((temps & dst.bit()) == 0);
3265 ASSERT((temps & src.bit()) == 0);
3266 // Primitive implementation using only one temporary register.
3267
3268 Register tmp = no_reg;
3269 // Find a temp register in temps list.
3270 for (int i = 0; i < kNumRegisters; i++) {
3271 if ((temps & (1 << i)) != 0) {
3272 tmp.code_ = i;
3273 break;
3274 }
3275 }
3276 ASSERT(!tmp.is(no_reg));
3277
3278 for (int i = 0; i < field_count; i++) {
3279 lw(tmp, FieldMemOperand(src, i * kPointerSize));
3280 sw(tmp, FieldMemOperand(dst, i * kPointerSize));
3281 }
3282}
3283
3284
karlklose@chromium.org83a47282011-05-11 11:54:09 +00003285void MacroAssembler::CopyBytes(Register src,
3286 Register dst,
3287 Register length,
3288 Register scratch) {
machenbach@chromium.org3d079fe2013-09-25 08:19:55 +00003289 Label align_loop_1, word_loop, byte_loop, byte_loop_1, done;
karlklose@chromium.org83a47282011-05-11 11:54:09 +00003290
3291 // Align src before copying in word size chunks.
machenbach@chromium.org3d079fe2013-09-25 08:19:55 +00003292 Branch(&byte_loop, le, length, Operand(kPointerSize));
karlklose@chromium.org83a47282011-05-11 11:54:09 +00003293 bind(&align_loop_1);
3294 And(scratch, src, kPointerSize - 1);
3295 Branch(&word_loop, eq, scratch, Operand(zero_reg));
3296 lbu(scratch, MemOperand(src));
3297 Addu(src, src, 1);
3298 sb(scratch, MemOperand(dst));
3299 Addu(dst, dst, 1);
3300 Subu(length, length, Operand(1));
machenbach@chromium.org3d079fe2013-09-25 08:19:55 +00003301 Branch(&align_loop_1, ne, length, Operand(zero_reg));
karlklose@chromium.org83a47282011-05-11 11:54:09 +00003302
3303 // Copy bytes in word size chunks.
3304 bind(&word_loop);
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00003305 if (emit_debug_code()) {
karlklose@chromium.org83a47282011-05-11 11:54:09 +00003306 And(scratch, src, kPointerSize - 1);
danno@chromium.org59400602013-08-13 17:09:37 +00003307 Assert(eq, kExpectingAlignmentForCopyBytes,
karlklose@chromium.org83a47282011-05-11 11:54:09 +00003308 scratch, Operand(zero_reg));
3309 }
3310 Branch(&byte_loop, lt, length, Operand(kPointerSize));
3311 lw(scratch, MemOperand(src));
3312 Addu(src, src, kPointerSize);
3313
3314 // TODO(kalmard) check if this can be optimized to use sw in most cases.
3315 // Can't use unaligned access - copy byte by byte.
3316 sb(scratch, MemOperand(dst, 0));
3317 srl(scratch, scratch, 8);
3318 sb(scratch, MemOperand(dst, 1));
3319 srl(scratch, scratch, 8);
3320 sb(scratch, MemOperand(dst, 2));
3321 srl(scratch, scratch, 8);
3322 sb(scratch, MemOperand(dst, 3));
3323 Addu(dst, dst, 4);
3324
3325 Subu(length, length, Operand(kPointerSize));
3326 Branch(&word_loop);
3327
3328 // Copy the last bytes if any left.
3329 bind(&byte_loop);
3330 Branch(&done, eq, length, Operand(zero_reg));
3331 bind(&byte_loop_1);
3332 lbu(scratch, MemOperand(src));
3333 Addu(src, src, 1);
3334 sb(scratch, MemOperand(dst));
3335 Addu(dst, dst, 1);
3336 Subu(length, length, Operand(1));
3337 Branch(&byte_loop_1, ne, length, Operand(zero_reg));
3338 bind(&done);
3339}
3340
3341
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00003342void MacroAssembler::InitializeFieldsWithFiller(Register start_offset,
3343 Register end_offset,
3344 Register filler) {
3345 Label loop, entry;
3346 Branch(&entry);
3347 bind(&loop);
3348 sw(filler, MemOperand(start_offset));
3349 Addu(start_offset, start_offset, kPointerSize);
3350 bind(&entry);
3351 Branch(&loop, lt, start_offset, Operand(end_offset));
3352}
3353
3354
erik.corry@gmail.comd6076d92011-06-06 09:39:18 +00003355void MacroAssembler::CheckFastElements(Register map,
3356 Register scratch,
3357 Label* fail) {
svenpanne@chromium.org830d30c2012-05-29 13:20:14 +00003358 STATIC_ASSERT(FAST_SMI_ELEMENTS == 0);
3359 STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1);
3360 STATIC_ASSERT(FAST_ELEMENTS == 2);
3361 STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3);
sgjesse@chromium.org6db88712011-07-11 11:41:22 +00003362 lbu(scratch, FieldMemOperand(map, Map::kBitField2Offset));
svenpanne@chromium.org830d30c2012-05-29 13:20:14 +00003363 Branch(fail, hi, scratch,
3364 Operand(Map::kMaximumBitField2FastHoleyElementValue));
erik.corry@gmail.comd6076d92011-06-06 09:39:18 +00003365}
3366
3367
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00003368void MacroAssembler::CheckFastObjectElements(Register map,
3369 Register scratch,
3370 Label* fail) {
svenpanne@chromium.org830d30c2012-05-29 13:20:14 +00003371 STATIC_ASSERT(FAST_SMI_ELEMENTS == 0);
3372 STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1);
3373 STATIC_ASSERT(FAST_ELEMENTS == 2);
3374 STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3);
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00003375 lbu(scratch, FieldMemOperand(map, Map::kBitField2Offset));
3376 Branch(fail, ls, scratch,
svenpanne@chromium.org830d30c2012-05-29 13:20:14 +00003377 Operand(Map::kMaximumBitField2FastHoleySmiElementValue));
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00003378 Branch(fail, hi, scratch,
svenpanne@chromium.org830d30c2012-05-29 13:20:14 +00003379 Operand(Map::kMaximumBitField2FastHoleyElementValue));
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00003380}
3381
3382
svenpanne@chromium.org830d30c2012-05-29 13:20:14 +00003383void MacroAssembler::CheckFastSmiElements(Register map,
3384 Register scratch,
3385 Label* fail) {
3386 STATIC_ASSERT(FAST_SMI_ELEMENTS == 0);
3387 STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1);
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00003388 lbu(scratch, FieldMemOperand(map, Map::kBitField2Offset));
3389 Branch(fail, hi, scratch,
svenpanne@chromium.org830d30c2012-05-29 13:20:14 +00003390 Operand(Map::kMaximumBitField2FastHoleySmiElementValue));
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00003391}
3392
3393
3394void MacroAssembler::StoreNumberToDoubleElements(Register value_reg,
3395 Register key_reg,
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00003396 Register elements_reg,
3397 Register scratch1,
3398 Register scratch2,
3399 Register scratch3,
ulan@chromium.org8e8d8822012-11-23 14:36:46 +00003400 Label* fail,
3401 int elements_offset) {
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00003402 Label smi_value, maybe_nan, have_double_value, is_nan, done;
3403 Register mantissa_reg = scratch2;
3404 Register exponent_reg = scratch3;
3405
3406 // Handle smi values specially.
3407 JumpIfSmi(value_reg, &smi_value);
3408
3409 // Ensure that the object is a heap number
3410 CheckMap(value_reg,
3411 scratch1,
danno@chromium.org88aa0582012-03-23 15:11:57 +00003412 Heap::kHeapNumberMapRootIndex,
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00003413 fail,
3414 DONT_DO_SMI_CHECK);
3415
3416 // Check for nan: all NaN values have a value greater (signed) than 0x7ff00000
3417 // in the exponent.
3418 li(scratch1, Operand(kNaNOrInfinityLowerBoundUpper32));
3419 lw(exponent_reg, FieldMemOperand(value_reg, HeapNumber::kExponentOffset));
3420 Branch(&maybe_nan, ge, exponent_reg, Operand(scratch1));
3421
3422 lw(mantissa_reg, FieldMemOperand(value_reg, HeapNumber::kMantissaOffset));
3423
3424 bind(&have_double_value);
3425 sll(scratch1, key_reg, kDoubleSizeLog2 - kSmiTagSize);
3426 Addu(scratch1, scratch1, elements_reg);
ulan@chromium.org8e8d8822012-11-23 14:36:46 +00003427 sw(mantissa_reg, FieldMemOperand(
3428 scratch1, FixedDoubleArray::kHeaderSize - elements_offset));
3429 uint32_t offset = FixedDoubleArray::kHeaderSize - elements_offset +
3430 sizeof(kHoleNanLower32);
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00003431 sw(exponent_reg, FieldMemOperand(scratch1, offset));
3432 jmp(&done);
3433
3434 bind(&maybe_nan);
3435 // Could be NaN or Infinity. If fraction is not zero, it's NaN, otherwise
3436 // it's an Infinity, and the non-NaN code path applies.
3437 Branch(&is_nan, gt, exponent_reg, Operand(scratch1));
3438 lw(mantissa_reg, FieldMemOperand(value_reg, HeapNumber::kMantissaOffset));
3439 Branch(&have_double_value, eq, mantissa_reg, Operand(zero_reg));
3440 bind(&is_nan);
3441 // Load canonical NaN for storing into the double array.
bmeurer@chromium.org25530ce2014-02-07 09:11:16 +00003442 LoadRoot(at, Heap::kNanValueRootIndex);
titzer@chromium.orgf5a24542014-03-04 09:06:17 +00003443 lw(mantissa_reg, FieldMemOperand(at, HeapNumber::kMantissaOffset));
3444 lw(exponent_reg, FieldMemOperand(at, HeapNumber::kExponentOffset));
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00003445 jmp(&have_double_value);
3446
3447 bind(&smi_value);
3448 Addu(scratch1, elements_reg,
ulan@chromium.org8e8d8822012-11-23 14:36:46 +00003449 Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag -
3450 elements_offset));
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00003451 sll(scratch2, key_reg, kDoubleSizeLog2 - kSmiTagSize);
3452 Addu(scratch1, scratch1, scratch2);
3453 // scratch1 is now effective address of the double element
3454
rossberg@chromium.org89e18f52012-10-22 13:09:53 +00003455 Register untagged_value = elements_reg;
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00003456 SmiUntag(untagged_value, value_reg);
mstarzinger@chromium.org1f410f92013-08-29 08:13:16 +00003457 mtc1(untagged_value, f2);
3458 cvt_d_w(f0, f2);
3459 sdc1(f0, MemOperand(scratch1, 0));
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00003460 bind(&done);
3461}
3462
3463
jkummerow@chromium.org05ed9dd2012-01-23 14:42:48 +00003464void MacroAssembler::CompareMapAndBranch(Register obj,
3465 Register scratch,
3466 Handle<Map> map,
3467 Label* early_success,
3468 Condition cond,
svenpanne@chromium.orga53e8e02013-05-24 12:35:50 +00003469 Label* branch_to) {
jkummerow@chromium.org05ed9dd2012-01-23 14:42:48 +00003470 lw(scratch, FieldMemOperand(obj, HeapObject::kMapOffset));
svenpanne@chromium.orga53e8e02013-05-24 12:35:50 +00003471 CompareMapAndBranch(scratch, map, early_success, cond, branch_to);
mmassi@chromium.org7028c052012-06-13 11:51:58 +00003472}
3473
3474
3475void MacroAssembler::CompareMapAndBranch(Register obj_map,
3476 Handle<Map> map,
3477 Label* early_success,
3478 Condition cond,
svenpanne@chromium.orga53e8e02013-05-24 12:35:50 +00003479 Label* branch_to) {
3480 Branch(branch_to, cond, obj_map, Operand(map));
jkummerow@chromium.org05ed9dd2012-01-23 14:42:48 +00003481}
3482
3483
lrn@chromium.org7516f052011-03-30 08:52:27 +00003484void MacroAssembler::CheckMap(Register obj,
3485 Register scratch,
3486 Handle<Map> map,
3487 Label* fail,
svenpanne@chromium.orga53e8e02013-05-24 12:35:50 +00003488 SmiCheckType smi_check_type) {
danno@chromium.org40cb8782011-05-25 07:58:50 +00003489 if (smi_check_type == DO_SMI_CHECK) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00003490 JumpIfSmi(obj, fail);
3491 }
jkummerow@chromium.org05ed9dd2012-01-23 14:42:48 +00003492 Label success;
svenpanne@chromium.orga53e8e02013-05-24 12:35:50 +00003493 CompareMapAndBranch(obj, scratch, map, &success, ne, fail);
jkummerow@chromium.org05ed9dd2012-01-23 14:42:48 +00003494 bind(&success);
lrn@chromium.org7516f052011-03-30 08:52:27 +00003495}
3496
3497
danno@chromium.org40cb8782011-05-25 07:58:50 +00003498void MacroAssembler::DispatchMap(Register obj,
3499 Register scratch,
3500 Handle<Map> map,
3501 Handle<Code> success,
3502 SmiCheckType smi_check_type) {
3503 Label fail;
3504 if (smi_check_type == DO_SMI_CHECK) {
3505 JumpIfSmi(obj, &fail);
3506 }
3507 lw(scratch, FieldMemOperand(obj, HeapObject::kMapOffset));
3508 Jump(success, RelocInfo::CODE_TARGET, eq, scratch, Operand(map));
3509 bind(&fail);
3510}
3511
3512
lrn@chromium.org7516f052011-03-30 08:52:27 +00003513void MacroAssembler::CheckMap(Register obj,
3514 Register scratch,
3515 Heap::RootListIndex index,
3516 Label* fail,
danno@chromium.org40cb8782011-05-25 07:58:50 +00003517 SmiCheckType smi_check_type) {
3518 if (smi_check_type == DO_SMI_CHECK) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00003519 JumpIfSmi(obj, fail);
3520 }
3521 lw(scratch, FieldMemOperand(obj, HeapObject::kMapOffset));
3522 LoadRoot(at, index);
3523 Branch(fail, ne, scratch, Operand(at));
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003524}
3525
3526
machenbach@chromium.org4ddd2f12014-01-14 08:13:44 +00003527void MacroAssembler::MovFromFloatResult(DoubleRegister dst) {
karlklose@chromium.org83a47282011-05-11 11:54:09 +00003528 if (IsMipsSoftFloatABI) {
danno@chromium.org40cb8782011-05-25 07:58:50 +00003529 Move(dst, v0, v1);
karlklose@chromium.org83a47282011-05-11 11:54:09 +00003530 } else {
danno@chromium.org40cb8782011-05-25 07:58:50 +00003531 Move(dst, f0); // Reg f0 is o32 ABI FP return value.
3532 }
3533}
3534
3535
machenbach@chromium.org4ddd2f12014-01-14 08:13:44 +00003536void MacroAssembler::MovFromFloatParameter(DoubleRegister dst) {
machenbach@chromium.org03453962014-01-10 14:16:31 +00003537 if (IsMipsSoftFloatABI) {
3538 Move(dst, a0, a1);
3539 } else {
3540 Move(dst, f12); // Reg f12 is o32 ABI FP first argument value.
3541 }
3542}
3543
3544
machenbach@chromium.org4ddd2f12014-01-14 08:13:44 +00003545void MacroAssembler::MovToFloatParameter(DoubleRegister src) {
danno@chromium.org40cb8782011-05-25 07:58:50 +00003546 if (!IsMipsSoftFloatABI) {
machenbach@chromium.org4ddd2f12014-01-14 08:13:44 +00003547 Move(f12, src);
danno@chromium.org40cb8782011-05-25 07:58:50 +00003548 } else {
machenbach@chromium.org4ddd2f12014-01-14 08:13:44 +00003549 Move(a0, a1, src);
danno@chromium.org40cb8782011-05-25 07:58:50 +00003550 }
3551}
3552
3553
machenbach@chromium.org4ddd2f12014-01-14 08:13:44 +00003554void MacroAssembler::MovToFloatResult(DoubleRegister src) {
machenbach@chromium.org03453962014-01-10 14:16:31 +00003555 if (!IsMipsSoftFloatABI) {
machenbach@chromium.org4ddd2f12014-01-14 08:13:44 +00003556 Move(f0, src);
machenbach@chromium.org03453962014-01-10 14:16:31 +00003557 } else {
machenbach@chromium.org4ddd2f12014-01-14 08:13:44 +00003558 Move(v0, v1, src);
machenbach@chromium.org03453962014-01-10 14:16:31 +00003559 }
3560}
3561
3562
machenbach@chromium.org4ddd2f12014-01-14 08:13:44 +00003563void MacroAssembler::MovToFloatParameters(DoubleRegister src1,
3564 DoubleRegister src2) {
danno@chromium.org40cb8782011-05-25 07:58:50 +00003565 if (!IsMipsSoftFloatABI) {
machenbach@chromium.org4ddd2f12014-01-14 08:13:44 +00003566 if (src2.is(f12)) {
3567 ASSERT(!src1.is(f14));
3568 Move(f14, src2);
3569 Move(f12, src1);
danno@chromium.org40cb8782011-05-25 07:58:50 +00003570 } else {
machenbach@chromium.org4ddd2f12014-01-14 08:13:44 +00003571 Move(f12, src1);
3572 Move(f14, src2);
karlklose@chromium.org83a47282011-05-11 11:54:09 +00003573 }
danno@chromium.org40cb8782011-05-25 07:58:50 +00003574 } else {
machenbach@chromium.org4ddd2f12014-01-14 08:13:44 +00003575 Move(a0, a1, src1);
3576 Move(a2, a3, src2);
danno@chromium.org40cb8782011-05-25 07:58:50 +00003577 }
3578}
3579
3580
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003581// -----------------------------------------------------------------------------
karlklose@chromium.org83a47282011-05-11 11:54:09 +00003582// JavaScript invokes.
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003583
3584void MacroAssembler::InvokePrologue(const ParameterCount& expected,
3585 const ParameterCount& actual,
3586 Handle<Code> code_constant,
3587 Register code_reg,
3588 Label* done,
jkummerow@chromium.org05ed9dd2012-01-23 14:42:48 +00003589 bool* definitely_mismatches,
lrn@chromium.org7516f052011-03-30 08:52:27 +00003590 InvokeFlag flag,
machenbach@chromium.orge31286d2014-01-15 10:29:52 +00003591 const CallWrapper& call_wrapper) {
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003592 bool definitely_matches = false;
jkummerow@chromium.org05ed9dd2012-01-23 14:42:48 +00003593 *definitely_mismatches = false;
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003594 Label regular_invoke;
3595
3596 // Check whether the expected and actual arguments count match. If not,
3597 // setup registers according to contract with ArgumentsAdaptorTrampoline:
3598 // a0: actual arguments count
3599 // a1: function (passed through to callee)
3600 // a2: expected arguments count
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003601
3602 // The code below is made a lot easier because the calling code already sets
3603 // up actual and expected registers according to the contract if values are
3604 // passed in registers.
3605 ASSERT(actual.is_immediate() || actual.reg().is(a0));
3606 ASSERT(expected.is_immediate() || expected.reg().is(a2));
3607 ASSERT((!code_constant.is_null() && code_reg.is(no_reg)) || code_reg.is(a3));
3608
3609 if (expected.is_immediate()) {
3610 ASSERT(actual.is_immediate());
3611 if (expected.immediate() == actual.immediate()) {
3612 definitely_matches = true;
3613 } else {
3614 li(a0, Operand(actual.immediate()));
3615 const int sentinel = SharedFunctionInfo::kDontAdaptArgumentsSentinel;
3616 if (expected.immediate() == sentinel) {
3617 // Don't worry about adapting arguments for builtins that
3618 // don't want that done. Skip adaption code by making it look
3619 // like we have a match between expected and actual number of
3620 // arguments.
3621 definitely_matches = true;
3622 } else {
jkummerow@chromium.org05ed9dd2012-01-23 14:42:48 +00003623 *definitely_mismatches = true;
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003624 li(a2, Operand(expected.immediate()));
3625 }
3626 }
karlklose@chromium.org83a47282011-05-11 11:54:09 +00003627 } else if (actual.is_immediate()) {
3628 Branch(&regular_invoke, eq, expected.reg(), Operand(actual.immediate()));
3629 li(a0, Operand(actual.immediate()));
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003630 } else {
karlklose@chromium.org83a47282011-05-11 11:54:09 +00003631 Branch(&regular_invoke, eq, expected.reg(), Operand(actual.reg()));
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003632 }
3633
3634 if (!definitely_matches) {
3635 if (!code_constant.is_null()) {
3636 li(a3, Operand(code_constant));
3637 addiu(a3, a3, Code::kHeaderSize - kHeapObjectTag);
3638 }
3639
lrn@chromium.org7516f052011-03-30 08:52:27 +00003640 Handle<Code> adaptor =
3641 isolate()->builtins()->ArgumentsAdaptorTrampoline();
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003642 if (flag == CALL_FUNCTION) {
sgjesse@chromium.org6db88712011-07-11 11:41:22 +00003643 call_wrapper.BeforeCall(CallSize(adaptor));
sgjesse@chromium.org6db88712011-07-11 11:41:22 +00003644 Call(adaptor);
fschneider@chromium.orgfb144a02011-05-04 12:43:48 +00003645 call_wrapper.AfterCall();
jkummerow@chromium.org05ed9dd2012-01-23 14:42:48 +00003646 if (!*definitely_mismatches) {
3647 Branch(done);
3648 }
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003649 } else {
lrn@chromium.org7516f052011-03-30 08:52:27 +00003650 Jump(adaptor, RelocInfo::CODE_TARGET);
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003651 }
3652 bind(&regular_invoke);
3653 }
3654}
3655
lrn@chromium.org7516f052011-03-30 08:52:27 +00003656
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003657void MacroAssembler::InvokeCode(Register code,
3658 const ParameterCount& expected,
3659 const ParameterCount& actual,
lrn@chromium.org7516f052011-03-30 08:52:27 +00003660 InvokeFlag flag,
machenbach@chromium.orge31286d2014-01-15 10:29:52 +00003661 const CallWrapper& call_wrapper) {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00003662 // You can't call a function without a valid frame.
3663 ASSERT(flag == JUMP_FUNCTION || has_frame());
3664
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003665 Label done;
3666
jkummerow@chromium.org05ed9dd2012-01-23 14:42:48 +00003667 bool definitely_mismatches = false;
3668 InvokePrologue(expected, actual, Handle<Code>::null(), code,
3669 &done, &definitely_mismatches, flag,
machenbach@chromium.orge31286d2014-01-15 10:29:52 +00003670 call_wrapper);
jkummerow@chromium.org05ed9dd2012-01-23 14:42:48 +00003671 if (!definitely_mismatches) {
3672 if (flag == CALL_FUNCTION) {
3673 call_wrapper.BeforeCall(CallSize(code));
jkummerow@chromium.org05ed9dd2012-01-23 14:42:48 +00003674 Call(code);
3675 call_wrapper.AfterCall();
3676 } else {
3677 ASSERT(flag == JUMP_FUNCTION);
jkummerow@chromium.org05ed9dd2012-01-23 14:42:48 +00003678 Jump(code);
3679 }
3680 // Continue here if InvokePrologue does handle the invocation due to
3681 // mismatched parameter counts.
3682 bind(&done);
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003683 }
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003684}
3685
3686
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003687void MacroAssembler::InvokeFunction(Register function,
3688 const ParameterCount& actual,
lrn@chromium.org7516f052011-03-30 08:52:27 +00003689 InvokeFlag flag,
machenbach@chromium.orge31286d2014-01-15 10:29:52 +00003690 const CallWrapper& call_wrapper) {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00003691 // You can't call a function without a valid frame.
3692 ASSERT(flag == JUMP_FUNCTION || has_frame());
3693
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003694 // Contract with called JS functions requires that function is passed in a1.
3695 ASSERT(function.is(a1));
3696 Register expected_reg = a2;
3697 Register code_reg = a3;
3698
3699 lw(code_reg, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
3700 lw(cp, FieldMemOperand(a1, JSFunction::kContextOffset));
3701 lw(expected_reg,
3702 FieldMemOperand(code_reg,
3703 SharedFunctionInfo::kFormalParameterCountOffset));
lrn@chromium.org7516f052011-03-30 08:52:27 +00003704 sra(expected_reg, expected_reg, kSmiTagSize);
3705 lw(code_reg, FieldMemOperand(a1, JSFunction::kCodeEntryOffset));
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003706
3707 ParameterCount expected(expected_reg);
machenbach@chromium.orge31286d2014-01-15 10:29:52 +00003708 InvokeCode(code_reg, expected, actual, flag, call_wrapper);
lrn@chromium.org7516f052011-03-30 08:52:27 +00003709}
3710
3711
machenbach@chromium.org8a58f642013-12-02 10:46:30 +00003712void MacroAssembler::InvokeFunction(Register function,
ulan@chromium.org32d7dba2013-04-24 10:59:06 +00003713 const ParameterCount& expected,
lrn@chromium.org7516f052011-03-30 08:52:27 +00003714 const ParameterCount& actual,
erik.corry@gmail.comd6076d92011-06-06 09:39:18 +00003715 InvokeFlag flag,
machenbach@chromium.orge31286d2014-01-15 10:29:52 +00003716 const CallWrapper& call_wrapper) {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00003717 // You can't call a function without a valid frame.
3718 ASSERT(flag == JUMP_FUNCTION || has_frame());
3719
machenbach@chromium.org8a58f642013-12-02 10:46:30 +00003720 // Contract with called JS functions requires that function is passed in a1.
3721 ASSERT(function.is(a1));
3722
lrn@chromium.org7516f052011-03-30 08:52:27 +00003723 // Get the function and setup the context.
lrn@chromium.org7516f052011-03-30 08:52:27 +00003724 lw(cp, FieldMemOperand(a1, JSFunction::kContextOffset));
3725
erik.corry@gmail.com394dbcf2011-10-27 07:38:48 +00003726 // We call indirectly through the code field in the function to
3727 // allow recompilation to take effect without changing any of the
3728 // call sites.
3729 lw(a3, FieldMemOperand(a1, JSFunction::kCodeEntryOffset));
machenbach@chromium.orge31286d2014-01-15 10:29:52 +00003730 InvokeCode(a3, expected, actual, flag, call_wrapper);
lrn@chromium.org7516f052011-03-30 08:52:27 +00003731}
3732
3733
machenbach@chromium.org8a58f642013-12-02 10:46:30 +00003734void MacroAssembler::InvokeFunction(Handle<JSFunction> function,
3735 const ParameterCount& expected,
3736 const ParameterCount& actual,
3737 InvokeFlag flag,
machenbach@chromium.orge31286d2014-01-15 10:29:52 +00003738 const CallWrapper& call_wrapper) {
machenbach@chromium.org8a58f642013-12-02 10:46:30 +00003739 li(a1, function);
machenbach@chromium.orge31286d2014-01-15 10:29:52 +00003740 InvokeFunction(a1, expected, actual, flag, call_wrapper);
machenbach@chromium.org8a58f642013-12-02 10:46:30 +00003741}
3742
3743
lrn@chromium.org7516f052011-03-30 08:52:27 +00003744void MacroAssembler::IsObjectJSObjectType(Register heap_object,
3745 Register map,
3746 Register scratch,
3747 Label* fail) {
3748 lw(map, FieldMemOperand(heap_object, HeapObject::kMapOffset));
3749 IsInstanceJSObjectType(map, scratch, fail);
3750}
3751
3752
3753void MacroAssembler::IsInstanceJSObjectType(Register map,
3754 Register scratch,
3755 Label* fail) {
3756 lbu(scratch, FieldMemOperand(map, Map::kInstanceTypeOffset));
erik.corry@gmail.comd6076d92011-06-06 09:39:18 +00003757 Branch(fail, lt, scratch, Operand(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE));
3758 Branch(fail, gt, scratch, Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE));
lrn@chromium.org7516f052011-03-30 08:52:27 +00003759}
3760
3761
3762void MacroAssembler::IsObjectJSStringType(Register object,
3763 Register scratch,
3764 Label* fail) {
3765 ASSERT(kNotStringTag != 0);
3766
3767 lw(scratch, FieldMemOperand(object, HeapObject::kMapOffset));
3768 lbu(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset));
3769 And(scratch, scratch, Operand(kIsNotStringMask));
3770 Branch(fail, ne, scratch, Operand(zero_reg));
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003771}
3772
3773
svenpanne@chromium.org9faefa42013-03-08 13:13:16 +00003774void MacroAssembler::IsObjectNameType(Register object,
3775 Register scratch,
3776 Label* fail) {
3777 lw(scratch, FieldMemOperand(object, HeapObject::kMapOffset));
3778 lbu(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset));
3779 Branch(fail, hi, scratch, Operand(LAST_NAME_TYPE));
3780}
3781
3782
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003783// ---------------------------------------------------------------------------
3784// Support functions.
3785
lrn@chromium.org7516f052011-03-30 08:52:27 +00003786
3787void MacroAssembler::TryGetFunctionPrototype(Register function,
3788 Register result,
3789 Register scratch,
erik.corry@gmail.com394dbcf2011-10-27 07:38:48 +00003790 Label* miss,
3791 bool miss_on_bound_function) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00003792 // Check that the receiver isn't a smi.
3793 JumpIfSmi(function, miss);
3794
3795 // Check that the function really is a function. Load map into result reg.
3796 GetObjectType(function, result, scratch);
3797 Branch(miss, ne, scratch, Operand(JS_FUNCTION_TYPE));
3798
erik.corry@gmail.com394dbcf2011-10-27 07:38:48 +00003799 if (miss_on_bound_function) {
3800 lw(scratch,
3801 FieldMemOperand(function, JSFunction::kSharedFunctionInfoOffset));
3802 lw(scratch,
3803 FieldMemOperand(scratch, SharedFunctionInfo::kCompilerHintsOffset));
3804 And(scratch, scratch,
3805 Operand(Smi::FromInt(1 << SharedFunctionInfo::kBoundFunction)));
3806 Branch(miss, ne, scratch, Operand(zero_reg));
3807 }
3808
lrn@chromium.org7516f052011-03-30 08:52:27 +00003809 // Make sure that the function has an instance prototype.
3810 Label non_instance;
3811 lbu(scratch, FieldMemOperand(result, Map::kBitFieldOffset));
3812 And(scratch, scratch, Operand(1 << Map::kHasNonInstancePrototype));
3813 Branch(&non_instance, ne, scratch, Operand(zero_reg));
3814
3815 // Get the prototype or initial map from the function.
3816 lw(result,
3817 FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset));
3818
3819 // If the prototype or initial map is the hole, don't return it and
3820 // simply miss the cache instead. This will allow us to allocate a
3821 // prototype object on-demand in the runtime system.
3822 LoadRoot(t8, Heap::kTheHoleValueRootIndex);
3823 Branch(miss, eq, result, Operand(t8));
3824
3825 // If the function does not have an initial map, we're done.
3826 Label done;
3827 GetObjectType(result, scratch, scratch);
3828 Branch(&done, ne, scratch, Operand(MAP_TYPE));
3829
3830 // Get the prototype from the initial map.
3831 lw(result, FieldMemOperand(result, Map::kPrototypeOffset));
3832 jmp(&done);
3833
3834 // Non-instance prototype: Fetch prototype from constructor field
3835 // in initial map.
3836 bind(&non_instance);
3837 lw(result, FieldMemOperand(result, Map::kConstructorOffset));
3838
3839 // All done.
3840 bind(&done);
3841}
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003842
3843
lrn@chromium.org7516f052011-03-30 08:52:27 +00003844void MacroAssembler::GetObjectType(Register object,
3845 Register map,
3846 Register type_reg) {
3847 lw(map, FieldMemOperand(object, HeapObject::kMapOffset));
3848 lbu(type_reg, FieldMemOperand(map, Map::kInstanceTypeOffset));
3849}
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003850
3851
3852// -----------------------------------------------------------------------------
karlklose@chromium.org83a47282011-05-11 11:54:09 +00003853// Runtime calls.
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00003854
ulan@chromium.org6ff65142012-03-21 09:52:17 +00003855void MacroAssembler::CallStub(CodeStub* stub,
jkummerow@chromium.org59297c72013-01-09 16:32:23 +00003856 TypeFeedbackId ast_id,
ulan@chromium.org6ff65142012-03-21 09:52:17 +00003857 Condition cond,
3858 Register r1,
3859 const Operand& r2,
3860 BranchDelaySlot bd) {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00003861 ASSERT(AllowThisStubCall(stub)); // Stub calls are not allowed in some stubs.
hpayer@chromium.org8432c912013-02-28 15:55:26 +00003862 Call(stub->GetCode(isolate()), RelocInfo::CODE_TARGET, ast_id,
mstarzinger@chromium.org471f2f12012-08-10 14:46:33 +00003863 cond, r1, r2, bd);
ager@chromium.org5c838252010-02-19 08:53:10 +00003864}
3865
3866
ulan@chromium.org0f13e742014-01-03 15:51:11 +00003867void MacroAssembler::TailCallStub(CodeStub* stub,
3868 Condition cond,
3869 Register r1,
3870 const Operand& r2,
3871 BranchDelaySlot bd) {
3872 Jump(stub->GetCode(isolate()), RelocInfo::CODE_TARGET, cond, r1, r2, bd);
ager@chromium.org5c838252010-02-19 08:53:10 +00003873}
3874
erik.corry@gmail.comd6076d92011-06-06 09:39:18 +00003875
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00003876static int AddressOffset(ExternalReference ref0, ExternalReference ref1) {
3877 return ref0.address() - ref1.address();
3878}
3879
3880
machenbach@chromium.org528ce022013-09-23 14:09:36 +00003881void MacroAssembler::CallApiFunctionAndReturn(
machenbach@chromium.orge014e5b2014-01-28 07:51:38 +00003882 Register function_address,
machenbach@chromium.org528ce022013-09-23 14:09:36 +00003883 ExternalReference thunk_ref,
machenbach@chromium.org528ce022013-09-23 14:09:36 +00003884 int stack_space,
3885 MemOperand return_value_operand,
3886 MemOperand* context_restore_operand) {
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00003887 ExternalReference next_address =
ulan@chromium.org09d7ab52013-02-25 15:50:35 +00003888 ExternalReference::handle_scope_next_address(isolate());
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00003889 const int kNextOffset = 0;
3890 const int kLimitOffset = AddressOffset(
ulan@chromium.org09d7ab52013-02-25 15:50:35 +00003891 ExternalReference::handle_scope_limit_address(isolate()),
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00003892 next_address);
3893 const int kLevelOffset = AddressOffset(
ulan@chromium.org09d7ab52013-02-25 15:50:35 +00003894 ExternalReference::handle_scope_level_address(isolate()),
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00003895 next_address);
3896
machenbach@chromium.org57a54ac2014-01-31 14:01:53 +00003897 ASSERT(function_address.is(a1) || function_address.is(a2));
machenbach@chromium.orge014e5b2014-01-28 07:51:38 +00003898
3899 Label profiler_disabled;
3900 Label end_profiler_check;
3901 bool* is_profiling_flag =
3902 isolate()->cpu_profiler()->is_profiling_address();
3903 STATIC_ASSERT(sizeof(*is_profiling_flag) == 1);
3904 li(t9, reinterpret_cast<int32_t>(is_profiling_flag));
3905 lb(t9, MemOperand(t9, 0));
3906 Branch(&profiler_disabled, eq, t9, Operand(zero_reg));
3907
3908 // Additional parameter is the address of the actual callback.
3909 li(t9, Operand(thunk_ref));
3910 jmp(&end_profiler_check);
3911
3912 bind(&profiler_disabled);
3913 mov(t9, function_address);
3914 bind(&end_profiler_check);
3915
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00003916 // Allocate HandleScope in callee-save registers.
3917 li(s3, Operand(next_address));
3918 lw(s0, MemOperand(s3, kNextOffset));
3919 lw(s1, MemOperand(s3, kLimitOffset));
3920 lw(s2, MemOperand(s3, kLevelOffset));
3921 Addu(s2, s2, Operand(1));
3922 sw(s2, MemOperand(s3, kLevelOffset));
3923
svenpanne@chromium.org83130cf2012-11-30 10:13:25 +00003924 if (FLAG_log_timer_events) {
3925 FrameScope frame(this, StackFrame::MANUAL);
3926 PushSafepointRegisters();
danno@chromium.orgca29dd82013-04-26 11:59:48 +00003927 PrepareCallCFunction(1, a0);
3928 li(a0, Operand(ExternalReference::isolate_address(isolate())));
3929 CallCFunction(ExternalReference::log_enter_external_function(isolate()), 1);
svenpanne@chromium.org83130cf2012-11-30 10:13:25 +00003930 PopSafepointRegisters();
3931 }
3932
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00003933 // Native call returns to the DirectCEntry stub which redirects to the
3934 // return address pushed on stack (could have moved after GC).
3935 // DirectCEntry stub itself is generated early and never moves.
3936 DirectCEntryStub stub;
dslomov@chromium.orgb752d402013-06-18 11:54:54 +00003937 stub.GenerateCall(this, t9);
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00003938
svenpanne@chromium.org83130cf2012-11-30 10:13:25 +00003939 if (FLAG_log_timer_events) {
3940 FrameScope frame(this, StackFrame::MANUAL);
3941 PushSafepointRegisters();
danno@chromium.orgca29dd82013-04-26 11:59:48 +00003942 PrepareCallCFunction(1, a0);
3943 li(a0, Operand(ExternalReference::isolate_address(isolate())));
3944 CallCFunction(ExternalReference::log_leave_external_function(isolate()), 1);
svenpanne@chromium.org83130cf2012-11-30 10:13:25 +00003945 PopSafepointRegisters();
3946 }
3947
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00003948 Label promote_scheduled_exception;
machenbach@chromium.org528ce022013-09-23 14:09:36 +00003949 Label exception_handled;
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00003950 Label delete_allocated_handles;
3951 Label leave_exit_frame;
ulan@chromium.orgbf9432e2013-05-22 14:05:23 +00003952 Label return_value_loaded;
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00003953
ulan@chromium.orgbf9432e2013-05-22 14:05:23 +00003954 // Load value from ReturnValue.
machenbach@chromium.org528ce022013-09-23 14:09:36 +00003955 lw(v0, return_value_operand);
ulan@chromium.orgbf9432e2013-05-22 14:05:23 +00003956 bind(&return_value_loaded);
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00003957
3958 // No more valid handles (the result handle was the last one). Restore
3959 // previous handle scope.
3960 sw(s0, MemOperand(s3, kNextOffset));
3961 if (emit_debug_code()) {
3962 lw(a1, MemOperand(s3, kLevelOffset));
danno@chromium.org59400602013-08-13 17:09:37 +00003963 Check(eq, kUnexpectedLevelAfterReturnFromApiCall, a1, Operand(s2));
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00003964 }
3965 Subu(s2, s2, Operand(1));
3966 sw(s2, MemOperand(s3, kLevelOffset));
3967 lw(at, MemOperand(s3, kLimitOffset));
3968 Branch(&delete_allocated_handles, ne, s1, Operand(at));
3969
3970 // Check if the function scheduled an exception.
3971 bind(&leave_exit_frame);
3972 LoadRoot(t0, Heap::kTheHoleValueRootIndex);
3973 li(at, Operand(ExternalReference::scheduled_exception_address(isolate())));
3974 lw(t1, MemOperand(at));
3975 Branch(&promote_scheduled_exception, ne, t0, Operand(t1));
machenbach@chromium.org528ce022013-09-23 14:09:36 +00003976 bind(&exception_handled);
3977
3978 bool restore_context = context_restore_operand != NULL;
3979 if (restore_context) {
3980 lw(cp, *context_restore_operand);
3981 }
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00003982 li(s0, Operand(stack_space));
machenbach@chromium.org528ce022013-09-23 14:09:36 +00003983 LeaveExitFrame(false, s0, !restore_context, EMIT_RETURN);
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00003984
3985 bind(&promote_scheduled_exception);
machenbach@chromium.org528ce022013-09-23 14:09:36 +00003986 {
3987 FrameScope frame(this, StackFrame::INTERNAL);
3988 CallExternalReference(
machenbach@chromium.org895f00d2014-03-27 01:04:43 +00003989 ExternalReference(Runtime::kHiddenPromoteScheduledException, isolate()),
machenbach@chromium.org528ce022013-09-23 14:09:36 +00003990 0);
3991 }
3992 jmp(&exception_handled);
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00003993
3994 // HandleScope limit has changed. Delete allocated extensions.
3995 bind(&delete_allocated_handles);
3996 sw(s1, MemOperand(s3, kLimitOffset));
3997 mov(s0, v0);
3998 mov(a0, v0);
3999 PrepareCallCFunction(1, s1);
ulan@chromium.org32d7dba2013-04-24 10:59:06 +00004000 li(a0, Operand(ExternalReference::isolate_address(isolate())));
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00004001 CallCFunction(ExternalReference::delete_handle_scope_extensions(isolate()),
4002 1);
4003 mov(v0, s0);
4004 jmp(&leave_exit_frame);
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00004005}
4006
ager@chromium.org5c838252010-02-19 08:53:10 +00004007
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00004008bool MacroAssembler::AllowThisStubCall(CodeStub* stub) {
machenbach@chromium.org8a58f642013-12-02 10:46:30 +00004009 return has_frame_ || !stub->SometimesSetsUpAFrame();
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00004010}
4011
4012
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004013void MacroAssembler::IllegalOperation(int num_arguments) {
4014 if (num_arguments > 0) {
4015 addiu(sp, sp, num_arguments * kPointerSize);
4016 }
4017 LoadRoot(v0, Heap::kUndefinedValueRootIndex);
4018}
4019
4020
lrn@chromium.org7516f052011-03-30 08:52:27 +00004021void MacroAssembler::IndexFromHash(Register hash,
4022 Register index) {
4023 // If the hash field contains an array index pick it out. The assert checks
4024 // that the constants for the maximum number of digits for an array index
4025 // cached in the hash field and the number of bits reserved for it does not
4026 // conflict.
4027 ASSERT(TenToThe(String::kMaxCachedArrayIndexLength) <
4028 (1 << String::kArrayIndexValueBits));
4029 // We want the smi-tagged index in key. kArrayIndexValueMask has zeros in
4030 // the low kHashShift bits.
4031 STATIC_ASSERT(kSmiTag == 0);
4032 Ext(hash, hash, String::kHashShift, String::kArrayIndexValueBits);
4033 sll(index, hash, kSmiTagSize);
4034}
4035
4036
4037void MacroAssembler::ObjectToDoubleFPURegister(Register object,
4038 FPURegister result,
4039 Register scratch1,
4040 Register scratch2,
4041 Register heap_number_map,
4042 Label* not_number,
4043 ObjectToDoubleFlags flags) {
4044 Label done;
4045 if ((flags & OBJECT_NOT_SMI) == 0) {
4046 Label not_smi;
4047 JumpIfNotSmi(object, &not_smi);
4048 // Remove smi tag and convert to double.
4049 sra(scratch1, object, kSmiTagSize);
4050 mtc1(scratch1, result);
4051 cvt_d_w(result, result);
4052 Branch(&done);
4053 bind(&not_smi);
4054 }
4055 // Check for heap number and load double value from it.
4056 lw(scratch1, FieldMemOperand(object, HeapObject::kMapOffset));
4057 Branch(not_number, ne, scratch1, Operand(heap_number_map));
4058
4059 if ((flags & AVOID_NANS_AND_INFINITIES) != 0) {
4060 // If exponent is all ones the number is either a NaN or +/-Infinity.
4061 Register exponent = scratch1;
4062 Register mask_reg = scratch2;
4063 lw(exponent, FieldMemOperand(object, HeapNumber::kExponentOffset));
4064 li(mask_reg, HeapNumber::kExponentMask);
4065
4066 And(exponent, exponent, mask_reg);
4067 Branch(not_number, eq, exponent, Operand(mask_reg));
4068 }
4069 ldc1(result, FieldMemOperand(object, HeapNumber::kValueOffset));
4070 bind(&done);
4071}
4072
4073
lrn@chromium.org7516f052011-03-30 08:52:27 +00004074void MacroAssembler::SmiToDoubleFPURegister(Register smi,
4075 FPURegister value,
4076 Register scratch1) {
4077 sra(scratch1, smi, kSmiTagSize);
4078 mtc1(scratch1, value);
4079 cvt_d_w(value, value);
4080}
4081
4082
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004083void MacroAssembler::AdduAndCheckForOverflow(Register dst,
4084 Register left,
4085 Register right,
4086 Register overflow_dst,
4087 Register scratch) {
4088 ASSERT(!dst.is(overflow_dst));
4089 ASSERT(!dst.is(scratch));
4090 ASSERT(!overflow_dst.is(scratch));
4091 ASSERT(!overflow_dst.is(left));
4092 ASSERT(!overflow_dst.is(right));
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00004093
4094 if (left.is(right) && dst.is(left)) {
4095 ASSERT(!dst.is(t9));
4096 ASSERT(!scratch.is(t9));
4097 ASSERT(!left.is(t9));
4098 ASSERT(!right.is(t9));
4099 ASSERT(!overflow_dst.is(t9));
4100 mov(t9, right);
4101 right = t9;
4102 }
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004103
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004104 if (dst.is(left)) {
ager@chromium.org04921a82011-06-27 13:21:41 +00004105 mov(scratch, left); // Preserve left.
4106 addu(dst, left, right); // Left is overwritten.
4107 xor_(scratch, dst, scratch); // Original left.
4108 xor_(overflow_dst, dst, right);
4109 and_(overflow_dst, overflow_dst, scratch);
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004110 } else if (dst.is(right)) {
ager@chromium.org04921a82011-06-27 13:21:41 +00004111 mov(scratch, right); // Preserve right.
4112 addu(dst, left, right); // Right is overwritten.
4113 xor_(scratch, dst, scratch); // Original right.
4114 xor_(overflow_dst, dst, left);
4115 and_(overflow_dst, overflow_dst, scratch);
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004116 } else {
4117 addu(dst, left, right);
4118 xor_(overflow_dst, dst, left);
4119 xor_(scratch, dst, right);
4120 and_(overflow_dst, scratch, overflow_dst);
4121 }
4122}
4123
4124
4125void MacroAssembler::SubuAndCheckForOverflow(Register dst,
4126 Register left,
4127 Register right,
4128 Register overflow_dst,
4129 Register scratch) {
4130 ASSERT(!dst.is(overflow_dst));
4131 ASSERT(!dst.is(scratch));
4132 ASSERT(!overflow_dst.is(scratch));
4133 ASSERT(!overflow_dst.is(left));
4134 ASSERT(!overflow_dst.is(right));
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004135 ASSERT(!scratch.is(left));
4136 ASSERT(!scratch.is(right));
4137
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00004138 // This happens with some crankshaft code. Since Subu works fine if
4139 // left == right, let's not make that restriction here.
4140 if (left.is(right)) {
4141 mov(dst, zero_reg);
4142 mov(overflow_dst, zero_reg);
4143 return;
4144 }
4145
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004146 if (dst.is(left)) {
ager@chromium.org04921a82011-06-27 13:21:41 +00004147 mov(scratch, left); // Preserve left.
4148 subu(dst, left, right); // Left is overwritten.
4149 xor_(overflow_dst, dst, scratch); // scratch is original left.
4150 xor_(scratch, scratch, right); // scratch is original left.
4151 and_(overflow_dst, scratch, overflow_dst);
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004152 } else if (dst.is(right)) {
ager@chromium.org04921a82011-06-27 13:21:41 +00004153 mov(scratch, right); // Preserve right.
4154 subu(dst, left, right); // Right is overwritten.
4155 xor_(overflow_dst, dst, left);
4156 xor_(scratch, left, scratch); // Original right.
4157 and_(overflow_dst, scratch, overflow_dst);
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004158 } else {
4159 subu(dst, left, right);
4160 xor_(overflow_dst, dst, left);
4161 xor_(scratch, left, right);
4162 and_(overflow_dst, scratch, overflow_dst);
4163 }
4164}
4165
4166
lrn@chromium.org7516f052011-03-30 08:52:27 +00004167void MacroAssembler::CallRuntime(const Runtime::Function* f,
jkummerow@chromium.orgfb7a7c42013-10-02 11:41:02 +00004168 int num_arguments,
4169 SaveFPRegsMode save_doubles) {
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004170 // All parameters are on the stack. v0 has the return value after call.
4171
4172 // If the expected number of arguments of the runtime function is
4173 // constant, we check that the actual number of arguments match the
4174 // expectation.
4175 if (f->nargs >= 0 && f->nargs != num_arguments) {
4176 IllegalOperation(num_arguments);
4177 return;
4178 }
4179
4180 // TODO(1236192): Most runtime routines don't need the number of
4181 // arguments passed in because it is constant. At some point we
4182 // should remove this need and make the runtime routine entry code
4183 // smarter.
ulan@chromium.org6ff65142012-03-21 09:52:17 +00004184 PrepareCEntryArgs(num_arguments);
4185 PrepareCEntryFunction(ExternalReference(f, isolate()));
jkummerow@chromium.orgfb7a7c42013-10-02 11:41:02 +00004186 CEntryStub stub(1, save_doubles);
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004187 CallStub(&stub);
ager@chromium.org5c838252010-02-19 08:53:10 +00004188}
4189
4190
lrn@chromium.org7516f052011-03-30 08:52:27 +00004191void MacroAssembler::CallExternalReference(const ExternalReference& ext,
ulan@chromium.org6ff65142012-03-21 09:52:17 +00004192 int num_arguments,
4193 BranchDelaySlot bd) {
4194 PrepareCEntryArgs(num_arguments);
4195 PrepareCEntryFunction(ext);
lrn@chromium.org7516f052011-03-30 08:52:27 +00004196
4197 CEntryStub stub(1);
jkummerow@chromium.org59297c72013-01-09 16:32:23 +00004198 CallStub(&stub, TypeFeedbackId::None(), al, zero_reg, Operand(zero_reg), bd);
lrn@chromium.org7516f052011-03-30 08:52:27 +00004199}
4200
4201
ager@chromium.orgce5e87b2010-03-10 10:24:18 +00004202void MacroAssembler::TailCallExternalReference(const ExternalReference& ext,
4203 int num_arguments,
4204 int result_size) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00004205 // TODO(1236192): Most runtime routines don't need the number of
4206 // arguments passed in because it is constant. At some point we
4207 // should remove this need and make the runtime routine entry code
4208 // smarter.
ulan@chromium.org6ff65142012-03-21 09:52:17 +00004209 PrepareCEntryArgs(num_arguments);
lrn@chromium.org7516f052011-03-30 08:52:27 +00004210 JumpToExternalReference(ext);
ager@chromium.org5c838252010-02-19 08:53:10 +00004211}
4212
erik.corry@gmail.comd6076d92011-06-06 09:39:18 +00004213
ager@chromium.orgce5e87b2010-03-10 10:24:18 +00004214void MacroAssembler::TailCallRuntime(Runtime::FunctionId fid,
4215 int num_arguments,
4216 int result_size) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00004217 TailCallExternalReference(ExternalReference(fid, isolate()),
4218 num_arguments,
4219 result_size);
ager@chromium.orgce5e87b2010-03-10 10:24:18 +00004220}
4221
4222
ulan@chromium.org6ff65142012-03-21 09:52:17 +00004223void MacroAssembler::JumpToExternalReference(const ExternalReference& builtin,
4224 BranchDelaySlot bd) {
4225 PrepareCEntryFunction(builtin);
lrn@chromium.org7516f052011-03-30 08:52:27 +00004226 CEntryStub stub(1);
hpayer@chromium.org8432c912013-02-28 15:55:26 +00004227 Jump(stub.GetCode(isolate()),
ulan@chromium.org6ff65142012-03-21 09:52:17 +00004228 RelocInfo::CODE_TARGET,
4229 al,
4230 zero_reg,
4231 Operand(zero_reg),
4232 bd);
ager@chromium.org5c838252010-02-19 08:53:10 +00004233}
4234
4235
4236void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id,
sgjesse@chromium.org8e8294a2011-05-02 14:30:53 +00004237 InvokeFlag flag,
fschneider@chromium.orgfb144a02011-05-04 12:43:48 +00004238 const CallWrapper& call_wrapper) {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00004239 // You can't call a builtin without a valid frame.
4240 ASSERT(flag == JUMP_FUNCTION || has_frame());
4241
lrn@chromium.org7516f052011-03-30 08:52:27 +00004242 GetBuiltinEntry(t9, id);
sgjesse@chromium.org8e8294a2011-05-02 14:30:53 +00004243 if (flag == CALL_FUNCTION) {
fschneider@chromium.orgfb144a02011-05-04 12:43:48 +00004244 call_wrapper.BeforeCall(CallSize(t9));
lrn@chromium.org7516f052011-03-30 08:52:27 +00004245 Call(t9);
fschneider@chromium.orgfb144a02011-05-04 12:43:48 +00004246 call_wrapper.AfterCall();
lrn@chromium.org7516f052011-03-30 08:52:27 +00004247 } else {
sgjesse@chromium.org8e8294a2011-05-02 14:30:53 +00004248 ASSERT(flag == JUMP_FUNCTION);
lrn@chromium.org7516f052011-03-30 08:52:27 +00004249 Jump(t9);
4250 }
4251}
4252
4253
4254void MacroAssembler::GetBuiltinFunction(Register target,
4255 Builtins::JavaScript id) {
4256 // Load the builtins object into target register.
yangguo@chromium.org46839fb2012-08-28 09:06:19 +00004257 lw(target, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX)));
lrn@chromium.org7516f052011-03-30 08:52:27 +00004258 lw(target, FieldMemOperand(target, GlobalObject::kBuiltinsOffset));
4259 // Load the JavaScript builtin function from the builtins object.
4260 lw(target, FieldMemOperand(target,
4261 JSBuiltinsObject::OffsetOfFunctionWithId(id)));
ager@chromium.org5c838252010-02-19 08:53:10 +00004262}
4263
4264
4265void MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00004266 ASSERT(!target.is(a1));
4267 GetBuiltinFunction(a1, id);
4268 // Load the code entry point from the builtins object.
4269 lw(target, FieldMemOperand(a1, JSFunction::kCodeEntryOffset));
ager@chromium.org5c838252010-02-19 08:53:10 +00004270}
4271
4272
4273void MacroAssembler::SetCounter(StatsCounter* counter, int value,
4274 Register scratch1, Register scratch2) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00004275 if (FLAG_native_code_counters && counter->Enabled()) {
4276 li(scratch1, Operand(value));
4277 li(scratch2, Operand(ExternalReference(counter)));
4278 sw(scratch1, MemOperand(scratch2));
4279 }
ager@chromium.org5c838252010-02-19 08:53:10 +00004280}
4281
4282
4283void MacroAssembler::IncrementCounter(StatsCounter* counter, int value,
4284 Register scratch1, Register scratch2) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00004285 ASSERT(value > 0);
4286 if (FLAG_native_code_counters && counter->Enabled()) {
4287 li(scratch2, Operand(ExternalReference(counter)));
4288 lw(scratch1, MemOperand(scratch2));
4289 Addu(scratch1, scratch1, Operand(value));
4290 sw(scratch1, MemOperand(scratch2));
4291 }
ager@chromium.org5c838252010-02-19 08:53:10 +00004292}
4293
4294
4295void MacroAssembler::DecrementCounter(StatsCounter* counter, int value,
4296 Register scratch1, Register scratch2) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00004297 ASSERT(value > 0);
4298 if (FLAG_native_code_counters && counter->Enabled()) {
4299 li(scratch2, Operand(ExternalReference(counter)));
4300 lw(scratch1, MemOperand(scratch2));
4301 Subu(scratch1, scratch1, Operand(value));
4302 sw(scratch1, MemOperand(scratch2));
4303 }
ager@chromium.org5c838252010-02-19 08:53:10 +00004304}
4305
4306
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004307// -----------------------------------------------------------------------------
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004308// Debugging.
ager@chromium.org5c838252010-02-19 08:53:10 +00004309
danno@chromium.org59400602013-08-13 17:09:37 +00004310void MacroAssembler::Assert(Condition cc, BailoutReason reason,
ager@chromium.org5c838252010-02-19 08:53:10 +00004311 Register rs, Operand rt) {
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004312 if (emit_debug_code())
danno@chromium.org59400602013-08-13 17:09:37 +00004313 Check(cc, reason, rs, rt);
lrn@chromium.org7516f052011-03-30 08:52:27 +00004314}
4315
4316
lrn@chromium.org7516f052011-03-30 08:52:27 +00004317void MacroAssembler::AssertFastElements(Register elements) {
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004318 if (emit_debug_code()) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00004319 ASSERT(!elements.is(at));
4320 Label ok;
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004321 push(elements);
lrn@chromium.org7516f052011-03-30 08:52:27 +00004322 lw(elements, FieldMemOperand(elements, HeapObject::kMapOffset));
4323 LoadRoot(at, Heap::kFixedArrayMapRootIndex);
4324 Branch(&ok, eq, elements, Operand(at));
rossberg@chromium.org717967f2011-07-20 13:44:42 +00004325 LoadRoot(at, Heap::kFixedDoubleArrayMapRootIndex);
4326 Branch(&ok, eq, elements, Operand(at));
lrn@chromium.org7516f052011-03-30 08:52:27 +00004327 LoadRoot(at, Heap::kFixedCOWArrayMapRootIndex);
4328 Branch(&ok, eq, elements, Operand(at));
danno@chromium.org59400602013-08-13 17:09:37 +00004329 Abort(kJSObjectWithFastElementsMapHasSlowElements);
lrn@chromium.org7516f052011-03-30 08:52:27 +00004330 bind(&ok);
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004331 pop(elements);
lrn@chromium.org7516f052011-03-30 08:52:27 +00004332 }
ager@chromium.org5c838252010-02-19 08:53:10 +00004333}
4334
4335
danno@chromium.org59400602013-08-13 17:09:37 +00004336void MacroAssembler::Check(Condition cc, BailoutReason reason,
ager@chromium.org5c838252010-02-19 08:53:10 +00004337 Register rs, Operand rt) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00004338 Label L;
4339 Branch(&L, cc, rs, rt);
danno@chromium.org59400602013-08-13 17:09:37 +00004340 Abort(reason);
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004341 // Will not return here.
lrn@chromium.org7516f052011-03-30 08:52:27 +00004342 bind(&L);
ager@chromium.org5c838252010-02-19 08:53:10 +00004343}
4344
4345
danno@chromium.org59400602013-08-13 17:09:37 +00004346void MacroAssembler::Abort(BailoutReason reason) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00004347 Label abort_start;
4348 bind(&abort_start);
hpayer@chromium.org052c9562014-02-26 12:50:40 +00004349#ifdef DEBUG
titzer@chromium.orgf5a24542014-03-04 09:06:17 +00004350 const char* msg = GetBailoutReason(reason);
lrn@chromium.org7516f052011-03-30 08:52:27 +00004351 if (msg != NULL) {
4352 RecordComment("Abort message: ");
4353 RecordComment(msg);
4354 }
verwaest@chromium.org662436e2013-08-28 08:41:27 +00004355
4356 if (FLAG_trap_on_abort) {
4357 stop(msg);
4358 return;
4359 }
lrn@chromium.org7516f052011-03-30 08:52:27 +00004360#endif
lrn@chromium.org7516f052011-03-30 08:52:27 +00004361
titzer@chromium.orgf5a24542014-03-04 09:06:17 +00004362 li(a0, Operand(Smi::FromInt(reason)));
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004363 push(a0);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00004364 // Disable stub call restrictions to always allow calls to abort.
4365 if (!has_frame_) {
4366 // We don't actually want to generate a pile of code for this, so just
4367 // claim there is a stack frame, without generating one.
4368 FrameScope scope(this, StackFrame::NONE);
titzer@chromium.orgf5a24542014-03-04 09:06:17 +00004369 CallRuntime(Runtime::kAbort, 1);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00004370 } else {
titzer@chromium.orgf5a24542014-03-04 09:06:17 +00004371 CallRuntime(Runtime::kAbort, 1);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00004372 }
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004373 // Will not return here.
lrn@chromium.org7516f052011-03-30 08:52:27 +00004374 if (is_trampoline_pool_blocked()) {
4375 // If the calling code cares about the exact number of
4376 // instructions generated, we insert padding here to keep the size
4377 // of the Abort macro constant.
4378 // Currently in debug mode with debug_code enabled the number of
titzer@chromium.orgf5a24542014-03-04 09:06:17 +00004379 // generated instructions is 10, so we use this as a maximum value.
4380 static const int kExpectedAbortInstructions = 10;
lrn@chromium.org7516f052011-03-30 08:52:27 +00004381 int abort_instructions = InstructionsGeneratedSince(&abort_start);
4382 ASSERT(abort_instructions <= kExpectedAbortInstructions);
4383 while (abort_instructions++ < kExpectedAbortInstructions) {
4384 nop();
4385 }
4386 }
4387}
4388
4389
4390void MacroAssembler::LoadContext(Register dst, int context_chain_length) {
4391 if (context_chain_length > 0) {
4392 // Move up the chain of contexts to the context containing the slot.
svenpanne@chromium.org6d786c92011-06-15 10:58:27 +00004393 lw(dst, MemOperand(cp, Context::SlotOffset(Context::PREVIOUS_INDEX)));
lrn@chromium.org7516f052011-03-30 08:52:27 +00004394 for (int i = 1; i < context_chain_length; i++) {
svenpanne@chromium.org6d786c92011-06-15 10:58:27 +00004395 lw(dst, MemOperand(dst, Context::SlotOffset(Context::PREVIOUS_INDEX)));
lrn@chromium.org7516f052011-03-30 08:52:27 +00004396 }
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004397 } else {
4398 // Slot is in the current function context. Move it into the
4399 // destination register in case we store into it (the write barrier
4400 // cannot be allowed to destroy the context in esi).
4401 Move(dst, cp);
4402 }
lrn@chromium.org7516f052011-03-30 08:52:27 +00004403}
4404
4405
yangguo@chromium.org78d1ad42012-02-09 13:53:47 +00004406void MacroAssembler::LoadTransitionedArrayMapConditional(
4407 ElementsKind expected_kind,
4408 ElementsKind transitioned_kind,
4409 Register map_in_out,
4410 Register scratch,
4411 Label* no_map_match) {
4412 // Load the global or builtins object from the current context.
yangguo@chromium.org46839fb2012-08-28 09:06:19 +00004413 lw(scratch,
4414 MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX)));
4415 lw(scratch, FieldMemOperand(scratch, GlobalObject::kNativeContextOffset));
yangguo@chromium.org78d1ad42012-02-09 13:53:47 +00004416
4417 // Check that the function's map is the same as the expected cached map.
svenpanne@chromium.org830d30c2012-05-29 13:20:14 +00004418 lw(scratch,
4419 MemOperand(scratch,
4420 Context::SlotOffset(Context::JS_ARRAY_MAPS_INDEX)));
4421 size_t offset = expected_kind * kPointerSize +
4422 FixedArrayBase::kHeaderSize;
yangguo@chromium.org5a11aaf2012-06-20 11:29:00 +00004423 lw(at, FieldMemOperand(scratch, offset));
4424 Branch(no_map_match, ne, map_in_out, Operand(at));
yangguo@chromium.org78d1ad42012-02-09 13:53:47 +00004425
4426 // Use the transitioned cached map.
svenpanne@chromium.org830d30c2012-05-29 13:20:14 +00004427 offset = transitioned_kind * kPointerSize +
4428 FixedArrayBase::kHeaderSize;
4429 lw(map_in_out, FieldMemOperand(scratch, offset));
yangguo@chromium.org78d1ad42012-02-09 13:53:47 +00004430}
4431
4432
lrn@chromium.org7516f052011-03-30 08:52:27 +00004433void MacroAssembler::LoadGlobalFunction(int index, Register function) {
4434 // Load the global or builtins object from the current context.
yangguo@chromium.org46839fb2012-08-28 09:06:19 +00004435 lw(function,
4436 MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX)));
4437 // Load the native context from the global or builtins object.
lrn@chromium.org7516f052011-03-30 08:52:27 +00004438 lw(function, FieldMemOperand(function,
yangguo@chromium.org46839fb2012-08-28 09:06:19 +00004439 GlobalObject::kNativeContextOffset));
4440 // Load the function from the native context.
lrn@chromium.org7516f052011-03-30 08:52:27 +00004441 lw(function, MemOperand(function, Context::SlotOffset(index)));
4442}
4443
4444
4445void MacroAssembler::LoadGlobalFunctionInitialMap(Register function,
4446 Register map,
4447 Register scratch) {
4448 // Load the initial map. The global functions all have initial maps.
4449 lw(map, FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset));
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004450 if (emit_debug_code()) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00004451 Label ok, fail;
danno@chromium.org40cb8782011-05-25 07:58:50 +00004452 CheckMap(map, scratch, Heap::kMetaMapRootIndex, &fail, DO_SMI_CHECK);
lrn@chromium.org7516f052011-03-30 08:52:27 +00004453 Branch(&ok);
4454 bind(&fail);
danno@chromium.org59400602013-08-13 17:09:37 +00004455 Abort(kGlobalFunctionsMustHaveInitialMap);
lrn@chromium.org7516f052011-03-30 08:52:27 +00004456 bind(&ok);
4457 }
ager@chromium.org5c838252010-02-19 08:53:10 +00004458}
4459
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004460
bmeurer@chromium.orgc9913f02013-10-24 06:31:36 +00004461void MacroAssembler::Prologue(PrologueFrameMode frame_mode) {
4462 if (frame_mode == BUILD_STUB_FRAME) {
4463 Push(ra, fp, cp);
4464 Push(Smi::FromInt(StackFrame::STUB));
4465 // Adjust FP to point to saved FP.
machenbach@chromium.org7ff76072013-11-21 09:47:43 +00004466 Addu(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp));
bmeurer@chromium.orgc9913f02013-10-24 06:31:36 +00004467 } else {
4468 PredictableCodeSizeScope predictible_code_size_scope(
4469 this, kNoCodeAgeSequenceLength * Assembler::kInstrSize);
4470 // The following three instructions must remain together and unmodified
4471 // for code aging to work properly.
machenbach@chromium.orged29eb22013-10-31 13:30:00 +00004472 if (isolate()->IsCodePreAgingActive()) {
bmeurer@chromium.orgc9913f02013-10-24 06:31:36 +00004473 // Pre-age the code.
4474 Code* stub = Code::GetPreAgedCodeAgeStub(isolate());
4475 nop(Assembler::CODE_AGE_MARKER_NOP);
machenbach@chromium.orgf9841892013-11-25 12:01:13 +00004476 // Load the stub address to t9 and call it,
4477 // GetCodeAgeAndParity() extracts the stub address from this instruction.
bmeurer@chromium.orgc9913f02013-10-24 06:31:36 +00004478 li(t9,
machenbach@chromium.orgf9841892013-11-25 12:01:13 +00004479 Operand(reinterpret_cast<uint32_t>(stub->instruction_start())),
4480 CONSTANT_SIZE);
4481 nop(); // Prevent jalr to jal optimization.
4482 jalr(t9, a0);
4483 nop(); // Branch delay slot nop.
4484 nop(); // Pad the empty space.
bmeurer@chromium.orgc9913f02013-10-24 06:31:36 +00004485 } else {
4486 Push(ra, fp, cp, a1);
4487 nop(Assembler::CODE_AGE_SEQUENCE_NOP);
4488 // Adjust fp to point to caller's fp.
machenbach@chromium.org7ff76072013-11-21 09:47:43 +00004489 Addu(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp));
bmeurer@chromium.orgc9913f02013-10-24 06:31:36 +00004490 }
4491 }
4492}
4493
4494
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004495void MacroAssembler::EnterFrame(StackFrame::Type type) {
4496 addiu(sp, sp, -5 * kPointerSize);
lrn@chromium.org7516f052011-03-30 08:52:27 +00004497 li(t8, Operand(Smi::FromInt(type)));
danno@chromium.org88aa0582012-03-23 15:11:57 +00004498 li(t9, Operand(CodeObject()), CONSTANT_SIZE);
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004499 sw(ra, MemOperand(sp, 4 * kPointerSize));
4500 sw(fp, MemOperand(sp, 3 * kPointerSize));
4501 sw(cp, MemOperand(sp, 2 * kPointerSize));
lrn@chromium.org7516f052011-03-30 08:52:27 +00004502 sw(t8, MemOperand(sp, 1 * kPointerSize));
4503 sw(t9, MemOperand(sp, 0 * kPointerSize));
machenbach@chromium.org7ff76072013-11-21 09:47:43 +00004504 // Adjust FP to point to saved FP.
4505 Addu(fp, sp,
4506 Operand(StandardFrameConstants::kFixedFrameSizeFromFp + kPointerSize));
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004507}
4508
4509
4510void MacroAssembler::LeaveFrame(StackFrame::Type type) {
4511 mov(sp, fp);
4512 lw(fp, MemOperand(sp, 0 * kPointerSize));
4513 lw(ra, MemOperand(sp, 1 * kPointerSize));
4514 addiu(sp, sp, 2 * kPointerSize);
4515}
4516
4517
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00004518void MacroAssembler::EnterExitFrame(bool save_doubles,
4519 int stack_space) {
erik.corry@gmail.comf2038fb2012-01-16 11:42:08 +00004520 // Set up the frame structure on the stack.
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00004521 STATIC_ASSERT(2 * kPointerSize == ExitFrameConstants::kCallerSPDisplacement);
4522 STATIC_ASSERT(1 * kPointerSize == ExitFrameConstants::kCallerPCOffset);
4523 STATIC_ASSERT(0 * kPointerSize == ExitFrameConstants::kCallerFPOffset);
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004524
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00004525 // This is how the stack will look:
4526 // fp + 2 (==kCallerSPDisplacement) - old stack's end
4527 // [fp + 1 (==kCallerPCOffset)] - saved old ra
4528 // [fp + 0 (==kCallerFPOffset)] - saved old fp
4529 // [fp - 1 (==kSPOffset)] - sp of the called function
4530 // [fp - 2 (==kCodeOffset)] - CodeObject
4531 // fp - (2 + stack_space + alignment) == sp == [fp - kSPOffset] - top of the
4532 // new stack (will contain saved ra)
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004533
4534 // Save registers.
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00004535 addiu(sp, sp, -4 * kPointerSize);
4536 sw(ra, MemOperand(sp, 3 * kPointerSize));
4537 sw(fp, MemOperand(sp, 2 * kPointerSize));
erik.corry@gmail.comf2038fb2012-01-16 11:42:08 +00004538 addiu(fp, sp, 2 * kPointerSize); // Set up new frame pointer.
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004539
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00004540 if (emit_debug_code()) {
4541 sw(zero_reg, MemOperand(fp, ExitFrameConstants::kSPOffset));
4542 }
4543
danno@chromium.org88aa0582012-03-23 15:11:57 +00004544 // Accessed from ExitFrame::code_slot.
4545 li(t8, Operand(CodeObject()), CONSTANT_SIZE);
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00004546 sw(t8, MemOperand(fp, ExitFrameConstants::kCodeOffset));
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004547
4548 // Save the frame pointer and the context in top.
kmillikin@chromium.org83e16822011-09-13 08:21:47 +00004549 li(t8, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate())));
lrn@chromium.org7516f052011-03-30 08:52:27 +00004550 sw(fp, MemOperand(t8));
kmillikin@chromium.org83e16822011-09-13 08:21:47 +00004551 li(t8, Operand(ExternalReference(Isolate::kContextAddress, isolate())));
lrn@chromium.org7516f052011-03-30 08:52:27 +00004552 sw(cp, MemOperand(t8));
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004553
danno@chromium.org40cb8782011-05-25 07:58:50 +00004554 const int frame_alignment = MacroAssembler::ActivationFrameAlignment();
4555 if (save_doubles) {
4556 // The stack must be allign to 0 modulo 8 for stores with sdc1.
4557 ASSERT(kDoubleSize == frame_alignment);
4558 if (frame_alignment > 0) {
4559 ASSERT(IsPowerOf2(frame_alignment));
4560 And(sp, sp, Operand(-frame_alignment)); // Align stack.
4561 }
hpayer@chromium.org7c3372b2013-02-13 17:26:04 +00004562 int space = FPURegister::kMaxNumRegisters * kDoubleSize;
danno@chromium.org40cb8782011-05-25 07:58:50 +00004563 Subu(sp, sp, Operand(space));
4564 // Remember: we only need to save every 2nd double FPU value.
hpayer@chromium.org7c3372b2013-02-13 17:26:04 +00004565 for (int i = 0; i < FPURegister::kMaxNumRegisters; i+=2) {
danno@chromium.org40cb8782011-05-25 07:58:50 +00004566 FPURegister reg = FPURegister::from_code(i);
4567 sdc1(reg, MemOperand(sp, i * kDoubleSize));
4568 }
4569 }
lrn@chromium.org7516f052011-03-30 08:52:27 +00004570
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00004571 // Reserve place for the return address, stack space and an optional slot
4572 // (used by the DirectCEntryStub to hold the return value if a struct is
4573 // returned) and align the frame preparing for calling the runtime function.
4574 ASSERT(stack_space >= 0);
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00004575 Subu(sp, sp, Operand((stack_space + 2) * kPointerSize));
4576 if (frame_alignment > 0) {
4577 ASSERT(IsPowerOf2(frame_alignment));
4578 And(sp, sp, Operand(-frame_alignment)); // Align stack.
lrn@chromium.org7516f052011-03-30 08:52:27 +00004579 }
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00004580
4581 // Set the exit frame sp value to point just before the return address
4582 // location.
4583 addiu(at, sp, kPointerSize);
4584 sw(at, MemOperand(fp, ExitFrameConstants::kSPOffset));
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004585}
4586
4587
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00004588void MacroAssembler::LeaveExitFrame(bool save_doubles,
ulan@chromium.org6ff65142012-03-21 09:52:17 +00004589 Register argument_count,
machenbach@chromium.org528ce022013-09-23 14:09:36 +00004590 bool restore_context,
ulan@chromium.org6ff65142012-03-21 09:52:17 +00004591 bool do_return) {
danno@chromium.org40cb8782011-05-25 07:58:50 +00004592 // Optionally restore all double registers.
4593 if (save_doubles) {
4594 // Remember: we only need to restore every 2nd double FPU value.
4595 lw(t8, MemOperand(fp, ExitFrameConstants::kSPOffset));
hpayer@chromium.org7c3372b2013-02-13 17:26:04 +00004596 for (int i = 0; i < FPURegister::kMaxNumRegisters; i+=2) {
danno@chromium.org40cb8782011-05-25 07:58:50 +00004597 FPURegister reg = FPURegister::from_code(i);
4598 ldc1(reg, MemOperand(t8, i * kDoubleSize + kPointerSize));
4599 }
4600 }
lrn@chromium.org7516f052011-03-30 08:52:27 +00004601
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004602 // Clear top frame.
kmillikin@chromium.org83e16822011-09-13 08:21:47 +00004603 li(t8, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate())));
lrn@chromium.org7516f052011-03-30 08:52:27 +00004604 sw(zero_reg, MemOperand(t8));
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004605
4606 // Restore current context from top and clear it in debug mode.
machenbach@chromium.org528ce022013-09-23 14:09:36 +00004607 if (restore_context) {
4608 li(t8, Operand(ExternalReference(Isolate::kContextAddress, isolate())));
4609 lw(cp, MemOperand(t8));
4610 }
hpayer@chromium.org2f877ac2013-09-18 15:29:06 +00004611#ifdef DEBUG
machenbach@chromium.org528ce022013-09-23 14:09:36 +00004612 li(t8, Operand(ExternalReference(Isolate::kContextAddress, isolate())));
lrn@chromium.org7516f052011-03-30 08:52:27 +00004613 sw(a3, MemOperand(t8));
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004614#endif
4615
4616 // Pop the arguments, restore registers, and return.
4617 mov(sp, fp); // Respect ABI stack constraint.
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00004618 lw(fp, MemOperand(sp, ExitFrameConstants::kCallerFPOffset));
4619 lw(ra, MemOperand(sp, ExitFrameConstants::kCallerPCOffset));
ulan@chromium.org6ff65142012-03-21 09:52:17 +00004620
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00004621 if (argument_count.is_valid()) {
4622 sll(t8, argument_count, kPointerSizeLog2);
4623 addu(sp, sp, t8);
4624 }
ulan@chromium.org6ff65142012-03-21 09:52:17 +00004625
4626 if (do_return) {
4627 Ret(USE_DELAY_SLOT);
4628 // If returning, the instruction in the delay slot will be the addiu below.
4629 }
4630 addiu(sp, sp, 8);
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004631}
4632
4633
lrn@chromium.org7516f052011-03-30 08:52:27 +00004634void MacroAssembler::InitializeNewString(Register string,
4635 Register length,
4636 Heap::RootListIndex map_index,
4637 Register scratch1,
4638 Register scratch2) {
4639 sll(scratch1, length, kSmiTagSize);
4640 LoadRoot(scratch2, map_index);
4641 sw(scratch1, FieldMemOperand(string, String::kLengthOffset));
4642 li(scratch1, Operand(String::kEmptyHashField));
4643 sw(scratch2, FieldMemOperand(string, HeapObject::kMapOffset));
4644 sw(scratch1, FieldMemOperand(string, String::kHashFieldOffset));
4645}
4646
4647
4648int MacroAssembler::ActivationFrameAlignment() {
jkummerow@chromium.org93a47f42013-07-02 14:43:41 +00004649#if V8_HOST_ARCH_MIPS
lrn@chromium.org7516f052011-03-30 08:52:27 +00004650 // Running on the real platform. Use the alignment as mandated by the local
4651 // environment.
4652 // Note: This will break if we ever start generating snapshots on one Mips
4653 // platform for another Mips platform with a different alignment.
4654 return OS::ActivationFrameAlignment();
jkummerow@chromium.org93a47f42013-07-02 14:43:41 +00004655#else // V8_HOST_ARCH_MIPS
lrn@chromium.org7516f052011-03-30 08:52:27 +00004656 // If we are using the simulator then we should always align to the expected
4657 // alignment. As the simulator is used to generate snapshots we do not know
4658 // if the target platform will need alignment, so this is controlled from a
4659 // flag.
4660 return FLAG_sim_stack_alignment;
jkummerow@chromium.org93a47f42013-07-02 14:43:41 +00004661#endif // V8_HOST_ARCH_MIPS
lrn@chromium.org7516f052011-03-30 08:52:27 +00004662}
4663
erik.corry@gmail.comd6076d92011-06-06 09:39:18 +00004664
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00004665void MacroAssembler::AssertStackIsAligned() {
4666 if (emit_debug_code()) {
4667 const int frame_alignment = ActivationFrameAlignment();
4668 const int frame_alignment_mask = frame_alignment - 1;
lrn@chromium.org7516f052011-03-30 08:52:27 +00004669
vegorov@chromium.org7304bca2011-05-16 12:14:13 +00004670 if (frame_alignment > kPointerSize) {
4671 Label alignment_as_expected;
4672 ASSERT(IsPowerOf2(frame_alignment));
4673 andi(at, sp, frame_alignment_mask);
4674 Branch(&alignment_as_expected, eq, at, Operand(zero_reg));
4675 // Don't use Check here, as it will call Runtime_Abort re-entering here.
4676 stop("Unexpected stack alignment");
4677 bind(&alignment_as_expected);
4678 }
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004679 }
kmillikin@chromium.org5d8f0e62010-03-24 08:21:20 +00004680}
4681
lrn@chromium.org7516f052011-03-30 08:52:27 +00004682
lrn@chromium.org7516f052011-03-30 08:52:27 +00004683void MacroAssembler::JumpIfNotPowerOfTwoOrZero(
4684 Register reg,
4685 Register scratch,
4686 Label* not_power_of_two_or_zero) {
4687 Subu(scratch, reg, Operand(1));
4688 Branch(USE_DELAY_SLOT, not_power_of_two_or_zero, lt,
4689 scratch, Operand(zero_reg));
4690 and_(at, scratch, reg); // In the delay slot.
4691 Branch(not_power_of_two_or_zero, ne, at, Operand(zero_reg));
4692}
4693
4694
danno@chromium.orgfa458e42012-02-01 10:48:36 +00004695void MacroAssembler::SmiTagCheckOverflow(Register reg, Register overflow) {
4696 ASSERT(!reg.is(overflow));
4697 mov(overflow, reg); // Save original value.
4698 SmiTag(reg);
4699 xor_(overflow, overflow, reg); // Overflow if (value ^ 2 * value) < 0.
4700}
4701
4702
4703void MacroAssembler::SmiTagCheckOverflow(Register dst,
4704 Register src,
4705 Register overflow) {
4706 if (dst.is(src)) {
4707 // Fall back to slower case.
4708 SmiTagCheckOverflow(dst, overflow);
4709 } else {
4710 ASSERT(!dst.is(src));
4711 ASSERT(!dst.is(overflow));
4712 ASSERT(!src.is(overflow));
4713 SmiTag(dst, src);
4714 xor_(overflow, dst, src); // Overflow if (value ^ 2 * value) < 0.
4715 }
4716}
4717
4718
4719void MacroAssembler::UntagAndJumpIfSmi(Register dst,
4720 Register src,
4721 Label* smi_case) {
4722 JumpIfSmi(src, smi_case, at, USE_DELAY_SLOT);
4723 SmiUntag(dst, src);
4724}
4725
4726
4727void MacroAssembler::UntagAndJumpIfNotSmi(Register dst,
4728 Register src,
4729 Label* non_smi_case) {
4730 JumpIfNotSmi(src, non_smi_case, at, USE_DELAY_SLOT);
4731 SmiUntag(dst, src);
4732}
4733
4734void MacroAssembler::JumpIfSmi(Register value,
4735 Label* smi_label,
4736 Register scratch,
4737 BranchDelaySlot bd) {
4738 ASSERT_EQ(0, kSmiTag);
4739 andi(scratch, value, kSmiTagMask);
4740 Branch(bd, smi_label, eq, scratch, Operand(zero_reg));
4741}
4742
4743void MacroAssembler::JumpIfNotSmi(Register value,
4744 Label* not_smi_label,
4745 Register scratch,
4746 BranchDelaySlot bd) {
4747 ASSERT_EQ(0, kSmiTag);
4748 andi(scratch, value, kSmiTagMask);
4749 Branch(bd, not_smi_label, ne, scratch, Operand(zero_reg));
4750}
4751
4752
lrn@chromium.org7516f052011-03-30 08:52:27 +00004753void MacroAssembler::JumpIfNotBothSmi(Register reg1,
4754 Register reg2,
4755 Label* on_not_both_smi) {
4756 STATIC_ASSERT(kSmiTag == 0);
4757 ASSERT_EQ(1, kSmiTagMask);
4758 or_(at, reg1, reg2);
jkummerow@chromium.orgc3b37122011-11-07 10:14:12 +00004759 JumpIfNotSmi(at, on_not_both_smi);
lrn@chromium.org7516f052011-03-30 08:52:27 +00004760}
4761
4762
4763void MacroAssembler::JumpIfEitherSmi(Register reg1,
4764 Register reg2,
4765 Label* on_either_smi) {
4766 STATIC_ASSERT(kSmiTag == 0);
4767 ASSERT_EQ(1, kSmiTagMask);
4768 // Both Smi tags must be 1 (not Smi).
4769 and_(at, reg1, reg2);
jkummerow@chromium.orgc3b37122011-11-07 10:14:12 +00004770 JumpIfSmi(at, on_either_smi);
lrn@chromium.org7516f052011-03-30 08:52:27 +00004771}
4772
4773
svenpanne@chromium.orgc859c4f2012-10-15 11:51:39 +00004774void MacroAssembler::AssertNotSmi(Register object) {
4775 if (emit_debug_code()) {
4776 STATIC_ASSERT(kSmiTag == 0);
4777 andi(at, object, kSmiTagMask);
danno@chromium.org59400602013-08-13 17:09:37 +00004778 Check(ne, kOperandIsASmi, at, Operand(zero_reg));
svenpanne@chromium.orgc859c4f2012-10-15 11:51:39 +00004779 }
lrn@chromium.org7516f052011-03-30 08:52:27 +00004780}
4781
4782
svenpanne@chromium.orgc859c4f2012-10-15 11:51:39 +00004783void MacroAssembler::AssertSmi(Register object) {
4784 if (emit_debug_code()) {
4785 STATIC_ASSERT(kSmiTag == 0);
4786 andi(at, object, kSmiTagMask);
danno@chromium.org59400602013-08-13 17:09:37 +00004787 Check(eq, kOperandIsASmi, at, Operand(zero_reg));
svenpanne@chromium.orgc859c4f2012-10-15 11:51:39 +00004788 }
lrn@chromium.org7516f052011-03-30 08:52:27 +00004789}
4790
4791
svenpanne@chromium.orgc859c4f2012-10-15 11:51:39 +00004792void MacroAssembler::AssertString(Register object) {
4793 if (emit_debug_code()) {
4794 STATIC_ASSERT(kSmiTag == 0);
machenbach@chromium.org7ff76072013-11-21 09:47:43 +00004795 SmiTst(object, t0);
danno@chromium.org59400602013-08-13 17:09:37 +00004796 Check(ne, kOperandIsASmiAndNotAString, t0, Operand(zero_reg));
svenpanne@chromium.orgc859c4f2012-10-15 11:51:39 +00004797 push(object);
4798 lw(object, FieldMemOperand(object, HeapObject::kMapOffset));
4799 lbu(object, FieldMemOperand(object, Map::kInstanceTypeOffset));
danno@chromium.org59400602013-08-13 17:09:37 +00004800 Check(lo, kOperandIsNotAString, object, Operand(FIRST_NONSTRING_TYPE));
svenpanne@chromium.orgc859c4f2012-10-15 11:51:39 +00004801 pop(object);
4802 }
karlklose@chromium.org83a47282011-05-11 11:54:09 +00004803}
4804
4805
svenpanne@chromium.org9faefa42013-03-08 13:13:16 +00004806void MacroAssembler::AssertName(Register object) {
4807 if (emit_debug_code()) {
4808 STATIC_ASSERT(kSmiTag == 0);
machenbach@chromium.org7ff76072013-11-21 09:47:43 +00004809 SmiTst(object, t0);
danno@chromium.org59400602013-08-13 17:09:37 +00004810 Check(ne, kOperandIsASmiAndNotAName, t0, Operand(zero_reg));
svenpanne@chromium.org9faefa42013-03-08 13:13:16 +00004811 push(object);
4812 lw(object, FieldMemOperand(object, HeapObject::kMapOffset));
4813 lbu(object, FieldMemOperand(object, Map::kInstanceTypeOffset));
danno@chromium.org59400602013-08-13 17:09:37 +00004814 Check(le, kOperandIsNotAName, object, Operand(LAST_NAME_TYPE));
svenpanne@chromium.org2bda5432013-03-15 12:39:50 +00004815 pop(object);
svenpanne@chromium.org9faefa42013-03-08 13:13:16 +00004816 }
4817}
4818
4819
machenbach@chromium.org2904d1a2014-03-18 01:05:18 +00004820void MacroAssembler::AssertUndefinedOrAllocationSite(Register object,
4821 Register scratch) {
4822 if (emit_debug_code()) {
4823 Label done_checking;
4824 AssertNotSmi(object);
4825 LoadRoot(scratch, Heap::kUndefinedValueRootIndex);
4826 Branch(&done_checking, eq, object, Operand(scratch));
4827 push(object);
4828 lw(object, FieldMemOperand(object, HeapObject::kMapOffset));
4829 LoadRoot(scratch, Heap::kAllocationSiteMapRootIndex);
4830 Assert(eq, kExpectedUndefinedOrCell, object, Operand(scratch));
4831 pop(object);
4832 bind(&done_checking);
4833 }
4834}
4835
4836
mstarzinger@chromium.org1f410f92013-08-29 08:13:16 +00004837void MacroAssembler::AssertIsRoot(Register reg, Heap::RootListIndex index) {
svenpanne@chromium.orgc859c4f2012-10-15 11:51:39 +00004838 if (emit_debug_code()) {
mstarzinger@chromium.org1f410f92013-08-29 08:13:16 +00004839 ASSERT(!reg.is(at));
4840 LoadRoot(at, index);
4841 Check(eq, kHeapNumberMapRegisterClobbered, reg, Operand(at));
svenpanne@chromium.orgc859c4f2012-10-15 11:51:39 +00004842 }
lrn@chromium.org7516f052011-03-30 08:52:27 +00004843}
4844
4845
4846void MacroAssembler::JumpIfNotHeapNumber(Register object,
4847 Register heap_number_map,
4848 Register scratch,
4849 Label* on_not_heap_number) {
4850 lw(scratch, FieldMemOperand(object, HeapObject::kMapOffset));
mstarzinger@chromium.org1f410f92013-08-29 08:13:16 +00004851 AssertIsRoot(heap_number_map, Heap::kHeapNumberMapRootIndex);
lrn@chromium.org7516f052011-03-30 08:52:27 +00004852 Branch(on_not_heap_number, ne, scratch, Operand(heap_number_map));
4853}
4854
4855
machenbach@chromium.org528ce022013-09-23 14:09:36 +00004856void MacroAssembler::LookupNumberStringCache(Register object,
4857 Register result,
4858 Register scratch1,
4859 Register scratch2,
4860 Register scratch3,
4861 Label* not_found) {
4862 // Use of registers. Register result is used as a temporary.
4863 Register number_string_cache = result;
4864 Register mask = scratch3;
4865
4866 // Load the number string cache.
4867 LoadRoot(number_string_cache, Heap::kNumberStringCacheRootIndex);
4868
4869 // Make the hash mask from the length of the number string cache. It
4870 // contains two elements (number and string) for each cache entry.
4871 lw(mask, FieldMemOperand(number_string_cache, FixedArray::kLengthOffset));
4872 // Divide length by two (length is a smi).
4873 sra(mask, mask, kSmiTagSize + 1);
4874 Addu(mask, mask, -1); // Make mask.
4875
4876 // Calculate the entry in the number string cache. The hash value in the
4877 // number string cache for smis is just the smi value, and the hash for
4878 // doubles is the xor of the upper and lower words. See
4879 // Heap::GetNumberStringCache.
4880 Label is_smi;
4881 Label load_result_from_cache;
4882 JumpIfSmi(object, &is_smi);
4883 CheckMap(object,
4884 scratch1,
4885 Heap::kHeapNumberMapRootIndex,
4886 not_found,
4887 DONT_DO_SMI_CHECK);
4888
4889 STATIC_ASSERT(8 == kDoubleSize);
4890 Addu(scratch1,
4891 object,
4892 Operand(HeapNumber::kValueOffset - kHeapObjectTag));
4893 lw(scratch2, MemOperand(scratch1, kPointerSize));
4894 lw(scratch1, MemOperand(scratch1, 0));
4895 Xor(scratch1, scratch1, Operand(scratch2));
4896 And(scratch1, scratch1, Operand(mask));
4897
4898 // Calculate address of entry in string cache: each entry consists
4899 // of two pointer sized fields.
4900 sll(scratch1, scratch1, kPointerSizeLog2 + 1);
4901 Addu(scratch1, number_string_cache, scratch1);
4902
4903 Register probe = mask;
4904 lw(probe, FieldMemOperand(scratch1, FixedArray::kHeaderSize));
4905 JumpIfSmi(probe, not_found);
4906 ldc1(f12, FieldMemOperand(object, HeapNumber::kValueOffset));
4907 ldc1(f14, FieldMemOperand(probe, HeapNumber::kValueOffset));
4908 BranchF(&load_result_from_cache, NULL, eq, f12, f14);
4909 Branch(not_found);
4910
4911 bind(&is_smi);
4912 Register scratch = scratch1;
4913 sra(scratch, object, 1); // Shift away the tag.
4914 And(scratch, mask, Operand(scratch));
4915
4916 // Calculate address of entry in string cache: each entry consists
4917 // of two pointer sized fields.
4918 sll(scratch, scratch, kPointerSizeLog2 + 1);
4919 Addu(scratch, number_string_cache, scratch);
4920
4921 // Check if the entry is the smi we are looking for.
4922 lw(probe, FieldMemOperand(scratch, FixedArray::kHeaderSize));
4923 Branch(not_found, ne, object, Operand(probe));
4924
4925 // Get the result from the cache.
4926 bind(&load_result_from_cache);
4927 lw(result, FieldMemOperand(scratch, FixedArray::kHeaderSize + kPointerSize));
4928
4929 IncrementCounter(isolate()->counters()->number_to_string_native(),
4930 1,
4931 scratch1,
4932 scratch2);
4933}
4934
4935
lrn@chromium.org7516f052011-03-30 08:52:27 +00004936void MacroAssembler::JumpIfNonSmisNotBothSequentialAsciiStrings(
4937 Register first,
4938 Register second,
4939 Register scratch1,
4940 Register scratch2,
4941 Label* failure) {
4942 // Test that both first and second are sequential ASCII strings.
4943 // Assume that they are non-smis.
4944 lw(scratch1, FieldMemOperand(first, HeapObject::kMapOffset));
4945 lw(scratch2, FieldMemOperand(second, HeapObject::kMapOffset));
4946 lbu(scratch1, FieldMemOperand(scratch1, Map::kInstanceTypeOffset));
4947 lbu(scratch2, FieldMemOperand(scratch2, Map::kInstanceTypeOffset));
4948
4949 JumpIfBothInstanceTypesAreNotSequentialAscii(scratch1,
4950 scratch2,
4951 scratch1,
4952 scratch2,
4953 failure);
4954}
4955
4956
4957void MacroAssembler::JumpIfNotBothSequentialAsciiStrings(Register first,
4958 Register second,
4959 Register scratch1,
4960 Register scratch2,
4961 Label* failure) {
4962 // Check that neither is a smi.
4963 STATIC_ASSERT(kSmiTag == 0);
4964 And(scratch1, first, Operand(second));
jkummerow@chromium.orgc3b37122011-11-07 10:14:12 +00004965 JumpIfSmi(scratch1, failure);
lrn@chromium.org7516f052011-03-30 08:52:27 +00004966 JumpIfNonSmisNotBothSequentialAsciiStrings(first,
4967 second,
4968 scratch1,
4969 scratch2,
4970 failure);
4971}
4972
4973
4974void MacroAssembler::JumpIfBothInstanceTypesAreNotSequentialAscii(
4975 Register first,
4976 Register second,
4977 Register scratch1,
4978 Register scratch2,
4979 Label* failure) {
yangguo@chromium.orgc73d55b2013-07-24 08:18:28 +00004980 const int kFlatAsciiStringMask =
yangguo@chromium.org46a2a512013-01-18 16:29:40 +00004981 kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask;
yangguo@chromium.orgc73d55b2013-07-24 08:18:28 +00004982 const int kFlatAsciiStringTag =
4983 kStringTag | kOneByteStringTag | kSeqStringTag;
lrn@chromium.org7516f052011-03-30 08:52:27 +00004984 ASSERT(kFlatAsciiStringTag <= 0xffff); // Ensure this fits 16-bit immed.
4985 andi(scratch1, first, kFlatAsciiStringMask);
4986 Branch(failure, ne, scratch1, Operand(kFlatAsciiStringTag));
4987 andi(scratch2, second, kFlatAsciiStringMask);
4988 Branch(failure, ne, scratch2, Operand(kFlatAsciiStringTag));
4989}
4990
4991
4992void MacroAssembler::JumpIfInstanceTypeIsNotSequentialAscii(Register type,
4993 Register scratch,
4994 Label* failure) {
yangguo@chromium.orgc73d55b2013-07-24 08:18:28 +00004995 const int kFlatAsciiStringMask =
yangguo@chromium.org46a2a512013-01-18 16:29:40 +00004996 kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask;
yangguo@chromium.orgc73d55b2013-07-24 08:18:28 +00004997 const int kFlatAsciiStringTag =
4998 kStringTag | kOneByteStringTag | kSeqStringTag;
lrn@chromium.org7516f052011-03-30 08:52:27 +00004999 And(scratch, type, Operand(kFlatAsciiStringMask));
5000 Branch(failure, ne, scratch, Operand(kFlatAsciiStringTag));
5001}
5002
5003
5004static const int kRegisterPassedArguments = 4;
5005
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00005006int MacroAssembler::CalculateStackPassedWords(int num_reg_arguments,
5007 int num_double_arguments) {
5008 int stack_passed_words = 0;
5009 num_reg_arguments += 2 * num_double_arguments;
5010
5011 // Up to four simple arguments are passed in registers a0..a3.
5012 if (num_reg_arguments > kRegisterPassedArguments) {
5013 stack_passed_words += num_reg_arguments - kRegisterPassedArguments;
5014 }
5015 stack_passed_words += kCArgSlotCount;
5016 return stack_passed_words;
5017}
5018
5019
machenbach@chromium.org9af454f2013-11-20 09:25:57 +00005020void MacroAssembler::EmitSeqStringSetCharCheck(Register string,
5021 Register index,
5022 Register value,
5023 Register scratch,
5024 uint32_t encoding_mask) {
5025 Label is_object;
machenbach@chromium.org7ff76072013-11-21 09:47:43 +00005026 SmiTst(string, at);
machenbach@chromium.org05150ab2014-01-29 08:13:29 +00005027 Check(ne, kNonObject, at, Operand(zero_reg));
machenbach@chromium.org9af454f2013-11-20 09:25:57 +00005028
5029 lw(at, FieldMemOperand(string, HeapObject::kMapOffset));
5030 lbu(at, FieldMemOperand(at, Map::kInstanceTypeOffset));
5031
5032 andi(at, at, kStringRepresentationMask | kStringEncodingMask);
5033 li(scratch, Operand(encoding_mask));
machenbach@chromium.org05150ab2014-01-29 08:13:29 +00005034 Check(eq, kUnexpectedStringType, at, Operand(scratch));
machenbach@chromium.org9af454f2013-11-20 09:25:57 +00005035
5036 // The index is assumed to be untagged coming in, tag it to compare with the
5037 // string length without using a temp register, it is restored at the end of
5038 // this function.
5039 Label index_tag_ok, index_tag_bad;
machenbach@chromium.org7ff76072013-11-21 09:47:43 +00005040 TrySmiTag(index, scratch, &index_tag_bad);
machenbach@chromium.org9af454f2013-11-20 09:25:57 +00005041 Branch(&index_tag_ok);
5042 bind(&index_tag_bad);
machenbach@chromium.org05150ab2014-01-29 08:13:29 +00005043 Abort(kIndexIsTooLarge);
machenbach@chromium.org9af454f2013-11-20 09:25:57 +00005044 bind(&index_tag_ok);
5045
5046 lw(at, FieldMemOperand(string, String::kLengthOffset));
machenbach@chromium.org05150ab2014-01-29 08:13:29 +00005047 Check(lt, kIndexIsTooLarge, index, Operand(at));
machenbach@chromium.org9af454f2013-11-20 09:25:57 +00005048
machenbach@chromium.org7ff76072013-11-21 09:47:43 +00005049 ASSERT(Smi::FromInt(0) == 0);
machenbach@chromium.org05150ab2014-01-29 08:13:29 +00005050 Check(ge, kIndexIsNegative, index, Operand(zero_reg));
machenbach@chromium.org9af454f2013-11-20 09:25:57 +00005051
5052 SmiUntag(index, index);
5053}
5054
5055
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00005056void MacroAssembler::PrepareCallCFunction(int num_reg_arguments,
5057 int num_double_arguments,
5058 Register scratch) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00005059 int frame_alignment = ActivationFrameAlignment();
5060
lrn@chromium.org7516f052011-03-30 08:52:27 +00005061 // Up to four simple arguments are passed in registers a0..a3.
5062 // Those four arguments must have reserved argument slots on the stack for
5063 // mips, even though those argument slots are not normally used.
5064 // Remaining arguments are pushed on the stack, above (higher address than)
5065 // the argument slots.
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00005066 int stack_passed_arguments = CalculateStackPassedWords(
5067 num_reg_arguments, num_double_arguments);
lrn@chromium.org7516f052011-03-30 08:52:27 +00005068 if (frame_alignment > kPointerSize) {
5069 // Make stack end at alignment and make room for num_arguments - 4 words
5070 // and the original value of sp.
5071 mov(scratch, sp);
5072 Subu(sp, sp, Operand((stack_passed_arguments + 1) * kPointerSize));
5073 ASSERT(IsPowerOf2(frame_alignment));
5074 And(sp, sp, Operand(-frame_alignment));
5075 sw(scratch, MemOperand(sp, stack_passed_arguments * kPointerSize));
5076 } else {
5077 Subu(sp, sp, Operand(stack_passed_arguments * kPointerSize));
5078 }
5079}
5080
5081
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00005082void MacroAssembler::PrepareCallCFunction(int num_reg_arguments,
5083 Register scratch) {
5084 PrepareCallCFunction(num_reg_arguments, 0, scratch);
5085}
5086
5087
5088void MacroAssembler::CallCFunction(ExternalReference function,
5089 int num_reg_arguments,
5090 int num_double_arguments) {
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00005091 li(t8, Operand(function));
5092 CallCFunctionHelper(t8, num_reg_arguments, num_double_arguments);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00005093}
5094
5095
5096void MacroAssembler::CallCFunction(Register function,
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00005097 int num_reg_arguments,
5098 int num_double_arguments) {
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00005099 CallCFunctionHelper(function, num_reg_arguments, num_double_arguments);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00005100}
5101
5102
lrn@chromium.org7516f052011-03-30 08:52:27 +00005103void MacroAssembler::CallCFunction(ExternalReference function,
5104 int num_arguments) {
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00005105 CallCFunction(function, num_arguments, 0);
lrn@chromium.org7516f052011-03-30 08:52:27 +00005106}
5107
5108
5109void MacroAssembler::CallCFunction(Register function,
lrn@chromium.org7516f052011-03-30 08:52:27 +00005110 int num_arguments) {
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00005111 CallCFunction(function, num_arguments, 0);
lrn@chromium.org7516f052011-03-30 08:52:27 +00005112}
5113
5114
5115void MacroAssembler::CallCFunctionHelper(Register function,
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00005116 int num_reg_arguments,
5117 int num_double_arguments) {
5118 ASSERT(has_frame());
lrn@chromium.org7516f052011-03-30 08:52:27 +00005119 // Make sure that the stack is aligned before calling a C function unless
5120 // running in the simulator. The simulator has its own alignment check which
5121 // provides more information.
5122 // The argument stots are presumed to have been set up by
5123 // PrepareCallCFunction. The C function must be called via t9, for mips ABI.
5124
jkummerow@chromium.org93a47f42013-07-02 14:43:41 +00005125#if V8_HOST_ARCH_MIPS
lrn@chromium.org7516f052011-03-30 08:52:27 +00005126 if (emit_debug_code()) {
5127 int frame_alignment = OS::ActivationFrameAlignment();
5128 int frame_alignment_mask = frame_alignment - 1;
5129 if (frame_alignment > kPointerSize) {
5130 ASSERT(IsPowerOf2(frame_alignment));
5131 Label alignment_as_expected;
5132 And(at, sp, Operand(frame_alignment_mask));
5133 Branch(&alignment_as_expected, eq, at, Operand(zero_reg));
5134 // Don't use Check here, as it will call Runtime_Abort possibly
5135 // re-entering here.
5136 stop("Unexpected alignment in CallCFunction");
5137 bind(&alignment_as_expected);
5138 }
5139 }
5140#endif // V8_HOST_ARCH_MIPS
5141
5142 // Just call directly. The function called cannot cause a GC, or
5143 // allow preemption, so the return address in the link register
5144 // stays correct.
lrn@chromium.org7516f052011-03-30 08:52:27 +00005145
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00005146 if (!function.is(t9)) {
karlklose@chromium.org83a47282011-05-11 11:54:09 +00005147 mov(t9, function);
lrn@chromium.org7516f052011-03-30 08:52:27 +00005148 function = t9;
5149 }
5150
5151 Call(function);
5152
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00005153 int stack_passed_arguments = CalculateStackPassedWords(
5154 num_reg_arguments, num_double_arguments);
lrn@chromium.org7516f052011-03-30 08:52:27 +00005155
5156 if (OS::ActivationFrameAlignment() > kPointerSize) {
5157 lw(sp, MemOperand(sp, stack_passed_arguments * kPointerSize));
5158 } else {
5159 Addu(sp, sp, Operand(stack_passed_arguments * sizeof(kPointerSize)));
5160 }
5161}
5162
5163
5164#undef BRANCH_ARGS_CHECK
5165
5166
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00005167void MacroAssembler::PatchRelocatedValue(Register li_location,
5168 Register scratch,
5169 Register new_value) {
5170 lw(scratch, MemOperand(li_location));
5171 // At this point scratch is a lui(at, ...) instruction.
5172 if (emit_debug_code()) {
5173 And(scratch, scratch, kOpcodeMask);
danno@chromium.org59400602013-08-13 17:09:37 +00005174 Check(eq, kTheInstructionToPatchShouldBeALui,
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00005175 scratch, Operand(LUI));
5176 lw(scratch, MemOperand(li_location));
5177 }
5178 srl(t9, new_value, kImm16Bits);
5179 Ins(scratch, t9, 0, kImm16Bits);
5180 sw(scratch, MemOperand(li_location));
5181
5182 lw(scratch, MemOperand(li_location, kInstrSize));
5183 // scratch is now ori(at, ...).
5184 if (emit_debug_code()) {
5185 And(scratch, scratch, kOpcodeMask);
danno@chromium.org59400602013-08-13 17:09:37 +00005186 Check(eq, kTheInstructionToPatchShouldBeAnOri,
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00005187 scratch, Operand(ORI));
5188 lw(scratch, MemOperand(li_location, kInstrSize));
5189 }
5190 Ins(scratch, new_value, 0, kImm16Bits);
5191 sw(scratch, MemOperand(li_location, kInstrSize));
5192
5193 // Update the I-cache so the new lui and ori can be executed.
5194 FlushICache(li_location, 2);
5195}
5196
jkummerow@chromium.org05ed9dd2012-01-23 14:42:48 +00005197void MacroAssembler::GetRelocatedValue(Register li_location,
5198 Register value,
5199 Register scratch) {
5200 lw(value, MemOperand(li_location));
5201 if (emit_debug_code()) {
5202 And(value, value, kOpcodeMask);
danno@chromium.org59400602013-08-13 17:09:37 +00005203 Check(eq, kTheInstructionShouldBeALui,
jkummerow@chromium.org05ed9dd2012-01-23 14:42:48 +00005204 value, Operand(LUI));
5205 lw(value, MemOperand(li_location));
5206 }
5207
5208 // value now holds a lui instruction. Extract the immediate.
5209 sll(value, value, kImm16Bits);
5210
5211 lw(scratch, MemOperand(li_location, kInstrSize));
5212 if (emit_debug_code()) {
5213 And(scratch, scratch, kOpcodeMask);
danno@chromium.org59400602013-08-13 17:09:37 +00005214 Check(eq, kTheInstructionShouldBeAnOri,
jkummerow@chromium.org05ed9dd2012-01-23 14:42:48 +00005215 scratch, Operand(ORI));
5216 lw(scratch, MemOperand(li_location, kInstrSize));
5217 }
5218 // "scratch" now holds an ori instruction. Extract the immediate.
5219 andi(scratch, scratch, kImm16Mask);
5220
5221 // Merge the results.
5222 or_(value, value, scratch);
5223}
5224
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00005225
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00005226void MacroAssembler::CheckPageFlag(
5227 Register object,
5228 Register scratch,
5229 int mask,
5230 Condition cc,
5231 Label* condition_met) {
5232 And(scratch, object, Operand(~Page::kPageAlignmentMask));
5233 lw(scratch, MemOperand(scratch, MemoryChunk::kFlagsOffset));
5234 And(scratch, scratch, Operand(mask));
5235 Branch(condition_met, cc, scratch, Operand(zero_reg));
5236}
5237
5238
danno@chromium.orgf005df62013-04-30 16:36:45 +00005239void MacroAssembler::CheckMapDeprecated(Handle<Map> map,
5240 Register scratch,
5241 Label* if_deprecated) {
5242 if (map->CanBeDeprecated()) {
5243 li(scratch, Operand(map));
5244 lw(scratch, FieldMemOperand(scratch, Map::kBitField3Offset));
5245 And(scratch, scratch, Operand(Smi::FromInt(Map::Deprecated::kMask)));
5246 Branch(if_deprecated, ne, scratch, Operand(zero_reg));
5247 }
5248}
5249
5250
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00005251void MacroAssembler::JumpIfBlack(Register object,
5252 Register scratch0,
5253 Register scratch1,
5254 Label* on_black) {
5255 HasColor(object, scratch0, scratch1, on_black, 1, 0); // kBlackBitPattern.
5256 ASSERT(strcmp(Marking::kBlackBitPattern, "10") == 0);
5257}
5258
5259
5260void MacroAssembler::HasColor(Register object,
5261 Register bitmap_scratch,
5262 Register mask_scratch,
5263 Label* has_color,
5264 int first_bit,
5265 int second_bit) {
5266 ASSERT(!AreAliased(object, bitmap_scratch, mask_scratch, t8));
5267 ASSERT(!AreAliased(object, bitmap_scratch, mask_scratch, t9));
5268
5269 GetMarkBits(object, bitmap_scratch, mask_scratch);
5270
5271 Label other_color, word_boundary;
5272 lw(t9, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize));
5273 And(t8, t9, Operand(mask_scratch));
5274 Branch(&other_color, first_bit == 1 ? eq : ne, t8, Operand(zero_reg));
5275 // Shift left 1 by adding.
5276 Addu(mask_scratch, mask_scratch, Operand(mask_scratch));
5277 Branch(&word_boundary, eq, mask_scratch, Operand(zero_reg));
5278 And(t8, t9, Operand(mask_scratch));
5279 Branch(has_color, second_bit == 1 ? ne : eq, t8, Operand(zero_reg));
5280 jmp(&other_color);
5281
5282 bind(&word_boundary);
5283 lw(t9, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize + kPointerSize));
5284 And(t9, t9, Operand(1));
5285 Branch(has_color, second_bit == 1 ? ne : eq, t9, Operand(zero_reg));
5286 bind(&other_color);
5287}
5288
5289
5290// Detect some, but not all, common pointer-free objects. This is used by the
5291// incremental write barrier which doesn't care about oddballs (they are always
5292// marked black immediately so this code is not hit).
5293void MacroAssembler::JumpIfDataObject(Register value,
5294 Register scratch,
5295 Label* not_data_object) {
5296 ASSERT(!AreAliased(value, scratch, t8, no_reg));
5297 Label is_data_object;
5298 lw(scratch, FieldMemOperand(value, HeapObject::kMapOffset));
5299 LoadRoot(t8, Heap::kHeapNumberMapRootIndex);
5300 Branch(&is_data_object, eq, t8, Operand(scratch));
5301 ASSERT(kIsIndirectStringTag == 1 && kIsIndirectStringMask == 1);
5302 ASSERT(kNotStringTag == 0x80 && kIsNotStringMask == 0x80);
5303 // If it's a string and it's not a cons string then it's an object containing
5304 // no GC pointers.
5305 lbu(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset));
5306 And(t8, scratch, Operand(kIsIndirectStringMask | kIsNotStringMask));
5307 Branch(not_data_object, ne, t8, Operand(zero_reg));
5308 bind(&is_data_object);
5309}
5310
5311
5312void MacroAssembler::GetMarkBits(Register addr_reg,
5313 Register bitmap_reg,
5314 Register mask_reg) {
5315 ASSERT(!AreAliased(addr_reg, bitmap_reg, mask_reg, no_reg));
5316 And(bitmap_reg, addr_reg, Operand(~Page::kPageAlignmentMask));
5317 Ext(mask_reg, addr_reg, kPointerSizeLog2, Bitmap::kBitsPerCellLog2);
5318 const int kLowBits = kPointerSizeLog2 + Bitmap::kBitsPerCellLog2;
5319 Ext(t8, addr_reg, kLowBits, kPageSizeBits - kLowBits);
5320 sll(t8, t8, kPointerSizeLog2);
5321 Addu(bitmap_reg, bitmap_reg, t8);
5322 li(t8, Operand(1));
5323 sllv(mask_reg, t8, mask_reg);
5324}
5325
5326
5327void MacroAssembler::EnsureNotWhite(
5328 Register value,
5329 Register bitmap_scratch,
5330 Register mask_scratch,
5331 Register load_scratch,
5332 Label* value_is_white_and_not_data) {
5333 ASSERT(!AreAliased(value, bitmap_scratch, mask_scratch, t8));
5334 GetMarkBits(value, bitmap_scratch, mask_scratch);
5335
5336 // If the value is black or grey we don't need to do anything.
5337 ASSERT(strcmp(Marking::kWhiteBitPattern, "00") == 0);
5338 ASSERT(strcmp(Marking::kBlackBitPattern, "10") == 0);
5339 ASSERT(strcmp(Marking::kGreyBitPattern, "11") == 0);
5340 ASSERT(strcmp(Marking::kImpossibleBitPattern, "01") == 0);
5341
5342 Label done;
5343
5344 // Since both black and grey have a 1 in the first position and white does
5345 // not have a 1 there we only need to check one bit.
5346 lw(load_scratch, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize));
5347 And(t8, mask_scratch, load_scratch);
5348 Branch(&done, ne, t8, Operand(zero_reg));
5349
erik.corry@gmail.comf2038fb2012-01-16 11:42:08 +00005350 if (emit_debug_code()) {
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00005351 // Check for impossible bit pattern.
5352 Label ok;
5353 // sll may overflow, making the check conservative.
5354 sll(t8, mask_scratch, 1);
5355 And(t8, load_scratch, t8);
5356 Branch(&ok, eq, t8, Operand(zero_reg));
5357 stop("Impossible marking bit pattern");
5358 bind(&ok);
5359 }
5360
5361 // Value is white. We check whether it is data that doesn't need scanning.
5362 // Currently only checks for HeapNumber and non-cons strings.
5363 Register map = load_scratch; // Holds map while checking type.
5364 Register length = load_scratch; // Holds length of object after testing type.
5365 Label is_data_object;
5366
5367 // Check for heap-number
5368 lw(map, FieldMemOperand(value, HeapObject::kMapOffset));
5369 LoadRoot(t8, Heap::kHeapNumberMapRootIndex);
5370 {
5371 Label skip;
5372 Branch(&skip, ne, t8, Operand(map));
5373 li(length, HeapNumber::kSize);
5374 Branch(&is_data_object);
5375 bind(&skip);
5376 }
5377
5378 // Check for strings.
5379 ASSERT(kIsIndirectStringTag == 1 && kIsIndirectStringMask == 1);
5380 ASSERT(kNotStringTag == 0x80 && kIsNotStringMask == 0x80);
5381 // If it's a string and it's not a cons string then it's an object containing
5382 // no GC pointers.
5383 Register instance_type = load_scratch;
5384 lbu(instance_type, FieldMemOperand(map, Map::kInstanceTypeOffset));
5385 And(t8, instance_type, Operand(kIsIndirectStringMask | kIsNotStringMask));
5386 Branch(value_is_white_and_not_data, ne, t8, Operand(zero_reg));
5387 // It's a non-indirect (non-cons and non-slice) string.
5388 // If it's external, the length is just ExternalString::kSize.
5389 // Otherwise it's String::kHeaderSize + string->length() * (1 or 2).
5390 // External strings are the only ones with the kExternalStringTag bit
5391 // set.
5392 ASSERT_EQ(0, kSeqStringTag & kExternalStringTag);
5393 ASSERT_EQ(0, kConsStringTag & kExternalStringTag);
5394 And(t8, instance_type, Operand(kExternalStringTag));
5395 {
5396 Label skip;
5397 Branch(&skip, eq, t8, Operand(zero_reg));
5398 li(length, ExternalString::kSize);
5399 Branch(&is_data_object);
5400 bind(&skip);
5401 }
5402
5403 // Sequential string, either ASCII or UC16.
5404 // For ASCII (char-size of 1) we shift the smi tag away to get the length.
5405 // For UC16 (char-size of 2) we just leave the smi tag in place, thereby
5406 // getting the length multiplied by 2.
mvstanton@chromium.orge4ac3ef2012-11-12 14:53:34 +00005407 ASSERT(kOneByteStringTag == 4 && kStringEncodingMask == 4);
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00005408 ASSERT(kSmiTag == 0 && kSmiTagSize == 1);
5409 lw(t9, FieldMemOperand(value, String::kLengthOffset));
5410 And(t8, instance_type, Operand(kStringEncodingMask));
5411 {
5412 Label skip;
5413 Branch(&skip, eq, t8, Operand(zero_reg));
5414 srl(t9, t9, 1);
5415 bind(&skip);
5416 }
5417 Addu(length, t9, Operand(SeqString::kHeaderSize + kObjectAlignmentMask));
5418 And(length, length, Operand(~kObjectAlignmentMask));
5419
5420 bind(&is_data_object);
5421 // Value is a data object, and it is white. Mark it black. Since we know
5422 // that the object is white we can make it black by flipping one bit.
5423 lw(t8, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize));
5424 Or(t8, t8, Operand(mask_scratch));
5425 sw(t8, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize));
5426
5427 And(bitmap_scratch, bitmap_scratch, Operand(~Page::kPageAlignmentMask));
5428 lw(t8, MemOperand(bitmap_scratch, MemoryChunk::kLiveBytesOffset));
5429 Addu(t8, t8, Operand(length));
5430 sw(t8, MemOperand(bitmap_scratch, MemoryChunk::kLiveBytesOffset));
5431
5432 bind(&done);
5433}
5434
5435
machenbach@chromium.org9af454f2013-11-20 09:25:57 +00005436void MacroAssembler::Throw(BailoutReason reason) {
5437 Label throw_start;
5438 bind(&throw_start);
5439#ifdef DEBUG
5440 const char* msg = GetBailoutReason(reason);
5441 if (msg != NULL) {
5442 RecordComment("Throw message: ");
5443 RecordComment(msg);
5444 }
5445#endif
5446
5447 li(a0, Operand(Smi::FromInt(reason)));
5448 push(a0);
5449 // Disable stub call restrictions to always allow calls to throw.
5450 if (!has_frame_) {
5451 // We don't actually want to generate a pile of code for this, so just
5452 // claim there is a stack frame, without generating one.
5453 FrameScope scope(this, StackFrame::NONE);
machenbach@chromium.org895f00d2014-03-27 01:04:43 +00005454 CallRuntime(Runtime::kHiddenThrowMessage, 1);
machenbach@chromium.org9af454f2013-11-20 09:25:57 +00005455 } else {
machenbach@chromium.org895f00d2014-03-27 01:04:43 +00005456 CallRuntime(Runtime::kHiddenThrowMessage, 1);
machenbach@chromium.org9af454f2013-11-20 09:25:57 +00005457 }
5458 // will not return here
5459 if (is_trampoline_pool_blocked()) {
5460 // If the calling code cares throw the exact number of
5461 // instructions generated, we insert padding here to keep the size
5462 // of the ThrowMessage macro constant.
5463 // Currently in debug mode with debug_code enabled the number of
5464 // generated instructions is 14, so we use this as a maximum value.
5465 static const int kExpectedThrowMessageInstructions = 14;
5466 int throw_instructions = InstructionsGeneratedSince(&throw_start);
5467 ASSERT(throw_instructions <= kExpectedThrowMessageInstructions);
5468 while (throw_instructions++ < kExpectedThrowMessageInstructions) {
5469 nop();
5470 }
5471 }
5472}
5473
5474
5475void MacroAssembler::ThrowIf(Condition cc,
5476 BailoutReason reason,
5477 Register rs,
5478 Operand rt) {
5479 Label L;
5480 Branch(&L, NegateCondition(cc), rs, rt);
5481 Throw(reason);
5482 // will not return here
5483 bind(&L);
5484}
5485
5486
danno@chromium.org40cb8782011-05-25 07:58:50 +00005487void MacroAssembler::LoadInstanceDescriptors(Register map,
rossberg@chromium.org89e18f52012-10-22 13:09:53 +00005488 Register descriptors) {
5489 lw(descriptors, FieldMemOperand(map, Map::kDescriptorsOffset));
danno@chromium.org40cb8782011-05-25 07:58:50 +00005490}
5491
5492
verwaest@chromium.org33e09c82012-10-10 17:07:22 +00005493void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) {
5494 lw(dst, FieldMemOperand(map, Map::kBitField3Offset));
5495 DecodeField<Map::NumberOfOwnDescriptorsBits>(dst);
5496}
5497
5498
jkummerow@chromium.org78502a92012-09-06 13:50:42 +00005499void MacroAssembler::EnumLength(Register dst, Register map) {
5500 STATIC_ASSERT(Map::EnumLengthBits::kShift == 0);
5501 lw(dst, FieldMemOperand(map, Map::kBitField3Offset));
5502 And(dst, dst, Operand(Smi::FromInt(Map::EnumLengthBits::kMask)));
5503}
5504
5505
ulan@chromium.org812308e2012-02-29 15:58:45 +00005506void MacroAssembler::CheckEnumCache(Register null_value, Label* call_runtime) {
ulan@chromium.org812308e2012-02-29 15:58:45 +00005507 Register empty_fixed_array_value = t2;
5508 LoadRoot(empty_fixed_array_value, Heap::kEmptyFixedArrayRootIndex);
jkummerow@chromium.org78502a92012-09-06 13:50:42 +00005509 Label next, start;
5510 mov(a2, a0);
5511
5512 // Check if the enum length field is properly initialized, indicating that
5513 // there is an enum cache.
5514 lw(a1, FieldMemOperand(a2, HeapObject::kMapOffset));
5515
5516 EnumLength(a3, a1);
machenbach@chromium.orgaf9cfcb2013-11-19 11:05:18 +00005517 Branch(
5518 call_runtime, eq, a3, Operand(Smi::FromInt(kInvalidEnumCacheSentinel)));
jkummerow@chromium.org78502a92012-09-06 13:50:42 +00005519
5520 jmp(&start);
5521
ulan@chromium.org812308e2012-02-29 15:58:45 +00005522 bind(&next);
jkummerow@chromium.org78502a92012-09-06 13:50:42 +00005523 lw(a1, FieldMemOperand(a2, HeapObject::kMapOffset));
ulan@chromium.org812308e2012-02-29 15:58:45 +00005524
5525 // For all objects but the receiver, check that the cache is empty.
jkummerow@chromium.org78502a92012-09-06 13:50:42 +00005526 EnumLength(a3, a1);
5527 Branch(call_runtime, ne, a3, Operand(Smi::FromInt(0)));
ulan@chromium.org812308e2012-02-29 15:58:45 +00005528
jkummerow@chromium.org78502a92012-09-06 13:50:42 +00005529 bind(&start);
5530
machenbach@chromium.org6d26cbb2014-01-22 10:50:56 +00005531 // Check that there are no elements. Register a2 contains the current JS
jkummerow@chromium.org78502a92012-09-06 13:50:42 +00005532 // object we've reached through the prototype chain.
machenbach@chromium.org6d26cbb2014-01-22 10:50:56 +00005533 Label no_elements;
jkummerow@chromium.org78502a92012-09-06 13:50:42 +00005534 lw(a2, FieldMemOperand(a2, JSObject::kElementsOffset));
machenbach@chromium.org6d26cbb2014-01-22 10:50:56 +00005535 Branch(&no_elements, eq, a2, Operand(empty_fixed_array_value));
jkummerow@chromium.org78502a92012-09-06 13:50:42 +00005536
machenbach@chromium.org6d26cbb2014-01-22 10:50:56 +00005537 // Second chance, the object may be using the empty slow element dictionary.
5538 LoadRoot(at, Heap::kEmptySlowElementDictionaryRootIndex);
5539 Branch(call_runtime, ne, a2, Operand(at));
5540
5541 bind(&no_elements);
jkummerow@chromium.org78502a92012-09-06 13:50:42 +00005542 lw(a2, FieldMemOperand(a1, Map::kPrototypeOffset));
5543 Branch(&next, ne, a2, Operand(null_value));
ulan@chromium.org812308e2012-02-29 15:58:45 +00005544}
5545
5546
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00005547void MacroAssembler::ClampUint8(Register output_reg, Register input_reg) {
5548 ASSERT(!output_reg.is(input_reg));
5549 Label done;
5550 li(output_reg, Operand(255));
5551 // Normal branch: nop in delay slot.
5552 Branch(&done, gt, input_reg, Operand(output_reg));
5553 // Use delay slot in this branch.
5554 Branch(USE_DELAY_SLOT, &done, lt, input_reg, Operand(zero_reg));
5555 mov(output_reg, zero_reg); // In delay slot.
5556 mov(output_reg, input_reg); // Value is in range 0..255.
5557 bind(&done);
5558}
5559
5560
5561void MacroAssembler::ClampDoubleToUint8(Register result_reg,
5562 DoubleRegister input_reg,
5563 DoubleRegister temp_double_reg) {
5564 Label above_zero;
5565 Label done;
5566 Label in_bounds;
5567
5568 Move(temp_double_reg, 0.0);
5569 BranchF(&above_zero, NULL, gt, input_reg, temp_double_reg);
5570
5571 // Double value is less than zero, NaN or Inf, return 0.
5572 mov(result_reg, zero_reg);
5573 Branch(&done);
5574
5575 // Double value is >= 255, return 255.
5576 bind(&above_zero);
5577 Move(temp_double_reg, 255.0);
5578 BranchF(&in_bounds, NULL, le, input_reg, temp_double_reg);
5579 li(result_reg, Operand(255));
5580 Branch(&done);
5581
5582 // In 0-255 range, round and truncate.
5583 bind(&in_bounds);
yangguo@chromium.org46839fb2012-08-28 09:06:19 +00005584 cvt_w_d(temp_double_reg, input_reg);
erik.corry@gmail.comc3b670f2011-10-05 21:44:48 +00005585 mfc1(result_reg, temp_double_reg);
5586 bind(&done);
5587}
5588
5589
jkummerow@chromium.orgba72ec82013-07-22 09:21:20 +00005590void MacroAssembler::TestJSArrayForAllocationMemento(
jkummerow@chromium.org59297c72013-01-09 16:32:23 +00005591 Register receiver_reg,
5592 Register scratch_reg,
mstarzinger@chromium.orgb4968be2013-10-16 09:00:56 +00005593 Label* no_memento_found,
hpayer@chromium.org7c3372b2013-02-13 17:26:04 +00005594 Condition cond,
jkummerow@chromium.orgba72ec82013-07-22 09:21:20 +00005595 Label* allocation_memento_present) {
jkummerow@chromium.org59297c72013-01-09 16:32:23 +00005596 ExternalReference new_space_start =
5597 ExternalReference::new_space_start(isolate());
5598 ExternalReference new_space_allocation_top =
5599 ExternalReference::new_space_allocation_top_address(isolate());
mvstanton@chromium.org6bec0092013-01-23 13:46:53 +00005600 Addu(scratch_reg, receiver_reg,
jkummerow@chromium.orgba72ec82013-07-22 09:21:20 +00005601 Operand(JSArray::kSize + AllocationMemento::kSize - kHeapObjectTag));
mstarzinger@chromium.orgb4968be2013-10-16 09:00:56 +00005602 Branch(no_memento_found, lt, scratch_reg, Operand(new_space_start));
mvstanton@chromium.org6bec0092013-01-23 13:46:53 +00005603 li(at, Operand(new_space_allocation_top));
5604 lw(at, MemOperand(at));
mstarzinger@chromium.orgb4968be2013-10-16 09:00:56 +00005605 Branch(no_memento_found, gt, scratch_reg, Operand(at));
jkummerow@chromium.orgba72ec82013-07-22 09:21:20 +00005606 lw(scratch_reg, MemOperand(scratch_reg, -AllocationMemento::kSize));
mstarzinger@chromium.orgb4968be2013-10-16 09:00:56 +00005607 if (allocation_memento_present) {
5608 Branch(allocation_memento_present, cond, scratch_reg,
5609 Operand(isolate()->factory()->allocation_memento_map()));
5610 }
jkummerow@chromium.org59297c72013-01-09 16:32:23 +00005611}
5612
5613
jkummerow@chromium.org8fa5bd92013-09-02 11:45:09 +00005614Register GetRegisterThatIsNotOneOf(Register reg1,
5615 Register reg2,
5616 Register reg3,
5617 Register reg4,
5618 Register reg5,
5619 Register reg6) {
5620 RegList regs = 0;
5621 if (reg1.is_valid()) regs |= reg1.bit();
5622 if (reg2.is_valid()) regs |= reg2.bit();
5623 if (reg3.is_valid()) regs |= reg3.bit();
5624 if (reg4.is_valid()) regs |= reg4.bit();
5625 if (reg5.is_valid()) regs |= reg5.bit();
5626 if (reg6.is_valid()) regs |= reg6.bit();
5627
5628 for (int i = 0; i < Register::NumAllocatableRegisters(); i++) {
5629 Register candidate = Register::FromAllocationIndex(i);
5630 if (regs & candidate.bit()) continue;
5631 return candidate;
5632 }
5633 UNREACHABLE();
5634 return no_reg;
5635}
5636
5637
machenbach@chromium.orge8412be2013-11-08 10:23:52 +00005638void MacroAssembler::JumpIfDictionaryInPrototypeChain(
5639 Register object,
5640 Register scratch0,
5641 Register scratch1,
5642 Label* found) {
5643 ASSERT(!scratch1.is(scratch0));
5644 Factory* factory = isolate()->factory();
5645 Register current = scratch0;
5646 Label loop_again;
5647
5648 // Scratch contained elements pointer.
5649 Move(current, object);
5650
5651 // Loop based on the map going up the prototype chain.
5652 bind(&loop_again);
5653 lw(current, FieldMemOperand(current, HeapObject::kMapOffset));
5654 lb(scratch1, FieldMemOperand(current, Map::kBitField2Offset));
5655 Ext(scratch1, scratch1, Map::kElementsKindShift, Map::kElementsKindBitCount);
5656 Branch(found, eq, scratch1, Operand(DICTIONARY_ELEMENTS));
5657 lw(current, FieldMemOperand(current, Map::kPrototypeOffset));
5658 Branch(&loop_again, ne, current, Operand(factory->null_value()));
5659}
5660
5661
rossberg@chromium.orgb4b2aa62011-10-13 09:49:59 +00005662bool AreAliased(Register r1, Register r2, Register r3, Register r4) {
5663 if (r1.is(r2)) return true;
5664 if (r1.is(r3)) return true;
5665 if (r1.is(r4)) return true;
5666 if (r2.is(r3)) return true;
5667 if (r2.is(r4)) return true;
5668 if (r3.is(r4)) return true;
5669 return false;
5670}
5671
5672
lrn@chromium.org7516f052011-03-30 08:52:27 +00005673CodePatcher::CodePatcher(byte* address, int instructions)
5674 : address_(address),
lrn@chromium.org7516f052011-03-30 08:52:27 +00005675 size_(instructions * Assembler::kInstrSize),
jkummerow@chromium.org212d9642012-05-11 15:02:09 +00005676 masm_(NULL, address, size_ + Assembler::kGap) {
lrn@chromium.org7516f052011-03-30 08:52:27 +00005677 // Create a new macro assembler pointing to the address of the code to patch.
5678 // The size is adjusted with kGap on order for the assembler to generate size
5679 // bytes of instructions without failing with buffer size constraints.
5680 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap);
5681}
5682
5683
5684CodePatcher::~CodePatcher() {
5685 // Indicate that code has changed.
5686 CPU::FlushICache(address_, size_);
5687
5688 // Check that the code was patched as expected.
5689 ASSERT(masm_.pc_ == address_ + size_);
5690 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap);
5691}
5692
5693
karlklose@chromium.org83a47282011-05-11 11:54:09 +00005694void CodePatcher::Emit(Instr instr) {
5695 masm()->emit(instr);
lrn@chromium.org7516f052011-03-30 08:52:27 +00005696}
5697
5698
5699void CodePatcher::Emit(Address addr) {
5700 masm()->emit(reinterpret_cast<Instr>(addr));
5701}
5702
5703
karlklose@chromium.org83a47282011-05-11 11:54:09 +00005704void CodePatcher::ChangeBranchCondition(Condition cond) {
5705 Instr instr = Assembler::instr_at(masm_.pc_);
5706 ASSERT(Assembler::IsBranch(instr));
5707 uint32_t opcode = Assembler::GetOpcodeField(instr);
5708 // Currently only the 'eq' and 'ne' cond values are supported and the simple
5709 // branch instructions (with opcode being the branch type).
5710 // There are some special cases (see Assembler::IsBranch()) so extending this
5711 // would be tricky.
5712 ASSERT(opcode == BEQ ||
5713 opcode == BNE ||
5714 opcode == BLEZ ||
5715 opcode == BGTZ ||
5716 opcode == BEQL ||
5717 opcode == BNEL ||
5718 opcode == BLEZL ||
5719 opcode == BGTZL);
5720 opcode = (cond == eq) ? BEQ : BNE;
5721 instr = (instr & ~kOpcodeMask) | opcode;
5722 masm_.emit(instr);
5723}
lrn@chromium.org7516f052011-03-30 08:52:27 +00005724
5725
machenbach@chromium.org69f64b12014-03-20 01:04:55 +00005726void MacroAssembler::TruncatingDiv(Register result,
5727 Register dividend,
5728 int32_t divisor) {
machenbach@chromium.orgbcc36722014-03-11 07:52:26 +00005729 ASSERT(!dividend.is(result));
5730 ASSERT(!dividend.is(at));
5731 ASSERT(!result.is(at));
5732 MultiplierAndShift ms(divisor);
5733 li(at, Operand(ms.multiplier()));
5734 Mult(dividend, Operand(at));
5735 mfhi(result);
5736 if (divisor > 0 && ms.multiplier() < 0) {
5737 Addu(result, result, Operand(dividend));
5738 }
5739 if (divisor < 0 && ms.multiplier() > 0) {
5740 Subu(result, result, Operand(dividend));
5741 }
machenbach@chromium.org69f64b12014-03-20 01:04:55 +00005742 if (ms.shift() > 0) sra(result, result, ms.shift());
5743 srl(at, dividend, 31);
5744 Addu(result, result, Operand(at));
machenbach@chromium.orgbcc36722014-03-11 07:52:26 +00005745}
5746
5747
ager@chromium.org5c838252010-02-19 08:53:10 +00005748} } // namespace v8::internal
5749
erik.corry@gmail.com9dfbea42010-05-21 12:58:28 +00005750#endif // V8_TARGET_ARCH_MIPS