Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1 | // Copyright (c) 1994-2006 Sun Microsystems Inc. |
| 2 | // All Rights Reserved. |
| 3 | // |
| 4 | // Redistribution and use in source and binary forms, with or without |
| 5 | // modification, are permitted provided that the following conditions |
| 6 | // are met: |
| 7 | // |
| 8 | // - Redistributions of source code must retain the above copyright notice, |
| 9 | // this list of conditions and the following disclaimer. |
| 10 | // |
| 11 | // - Redistribution in binary form must reproduce the above copyright |
| 12 | // notice, this list of conditions and the following disclaimer in the |
| 13 | // documentation and/or other materials provided with the |
| 14 | // distribution. |
| 15 | // |
| 16 | // - Neither the name of Sun Microsystems or the names of contributors may |
| 17 | // be used to endorse or promote products derived from this software without |
| 18 | // specific prior written permission. |
| 19 | // |
| 20 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 23 | // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 24 | // COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 25 | // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 26 | // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 27 | // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | // HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 29 | // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 30 | // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 31 | // OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 | |
| 33 | // The original source code covered by the above license above has been |
| 34 | // modified significantly by Google Inc. |
| 35 | // Copyright 2014 the V8 project authors. All rights reserved. |
| 36 | |
| 37 | // A light-weight PPC Assembler |
| 38 | // Generates user mode instructions for the PPC architecture up |
| 39 | |
| 40 | #ifndef V8_PPC_ASSEMBLER_PPC_H_ |
| 41 | #define V8_PPC_ASSEMBLER_PPC_H_ |
| 42 | |
| 43 | #include <stdio.h> |
| 44 | #include <vector> |
| 45 | |
| 46 | #include "src/assembler.h" |
| 47 | #include "src/ppc/constants-ppc.h" |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 48 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 49 | #if V8_HOST_ARCH_PPC && \ |
| 50 | (V8_OS_AIX || (V8_TARGET_ARCH_PPC64 && V8_TARGET_BIG_ENDIAN)) |
| 51 | #define ABI_USES_FUNCTION_DESCRIPTORS 1 |
| 52 | #else |
| 53 | #define ABI_USES_FUNCTION_DESCRIPTORS 0 |
| 54 | #endif |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 55 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 56 | #if !V8_HOST_ARCH_PPC || V8_OS_AIX || V8_TARGET_ARCH_PPC64 |
| 57 | #define ABI_PASSES_HANDLES_IN_REGS 1 |
| 58 | #else |
| 59 | #define ABI_PASSES_HANDLES_IN_REGS 0 |
| 60 | #endif |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 61 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 62 | #if !V8_HOST_ARCH_PPC || !V8_TARGET_ARCH_PPC64 || V8_TARGET_LITTLE_ENDIAN |
| 63 | #define ABI_RETURNS_OBJECT_PAIRS_IN_REGS 1 |
| 64 | #else |
| 65 | #define ABI_RETURNS_OBJECT_PAIRS_IN_REGS 0 |
| 66 | #endif |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 67 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 68 | #if !V8_HOST_ARCH_PPC || (V8_TARGET_ARCH_PPC64 && V8_TARGET_LITTLE_ENDIAN) |
| 69 | #define ABI_CALL_VIA_IP 1 |
| 70 | #else |
| 71 | #define ABI_CALL_VIA_IP 0 |
| 72 | #endif |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 73 | |
| 74 | #if !V8_HOST_ARCH_PPC || V8_OS_AIX || V8_TARGET_ARCH_PPC64 |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 75 | #define ABI_TOC_REGISTER 2 |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 76 | #else |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 77 | #define ABI_TOC_REGISTER 13 |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 78 | #endif |
| 79 | |
| 80 | #define INSTR_AND_DATA_CACHE_COHERENCY LWSYNC |
| 81 | |
| 82 | namespace v8 { |
| 83 | namespace internal { |
| 84 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 85 | // clang-format off |
| 86 | #define GENERAL_REGISTERS(V) \ |
| 87 | V(r0) V(sp) V(r2) V(r3) V(r4) V(r5) V(r6) V(r7) \ |
| 88 | V(r8) V(r9) V(r10) V(r11) V(ip) V(r13) V(r14) V(r15) \ |
| 89 | V(r16) V(r17) V(r18) V(r19) V(r20) V(r21) V(r22) V(r23) \ |
| 90 | V(r24) V(r25) V(r26) V(r27) V(r28) V(r29) V(r30) V(fp) |
| 91 | |
| 92 | #if V8_EMBEDDED_CONSTANT_POOL |
| 93 | #define ALLOCATABLE_GENERAL_REGISTERS(V) \ |
| 94 | V(r3) V(r4) V(r5) V(r6) V(r7) \ |
| 95 | V(r8) V(r9) V(r10) V(r14) V(r15) \ |
| 96 | V(r16) V(r17) V(r18) V(r19) V(r20) V(r21) V(r22) V(r23) \ |
| 97 | V(r24) V(r25) V(r26) V(r27) V(r30) |
| 98 | #else |
| 99 | #define ALLOCATABLE_GENERAL_REGISTERS(V) \ |
| 100 | V(r3) V(r4) V(r5) V(r6) V(r7) \ |
| 101 | V(r8) V(r9) V(r10) V(r14) V(r15) \ |
| 102 | V(r16) V(r17) V(r18) V(r19) V(r20) V(r21) V(r22) V(r23) \ |
| 103 | V(r24) V(r25) V(r26) V(r27) V(r28) V(r30) |
| 104 | #endif |
| 105 | |
| 106 | #define DOUBLE_REGISTERS(V) \ |
| 107 | V(d0) V(d1) V(d2) V(d3) V(d4) V(d5) V(d6) V(d7) \ |
| 108 | V(d8) V(d9) V(d10) V(d11) V(d12) V(d13) V(d14) V(d15) \ |
| 109 | V(d16) V(d17) V(d18) V(d19) V(d20) V(d21) V(d22) V(d23) \ |
| 110 | V(d24) V(d25) V(d26) V(d27) V(d28) V(d29) V(d30) V(d31) |
| 111 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 112 | #define FLOAT_REGISTERS DOUBLE_REGISTERS |
| 113 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 114 | #define ALLOCATABLE_DOUBLE_REGISTERS(V) \ |
| 115 | V(d1) V(d2) V(d3) V(d4) V(d5) V(d6) V(d7) \ |
| 116 | V(d8) V(d9) V(d10) V(d11) V(d12) V(d15) \ |
| 117 | V(d16) V(d17) V(d18) V(d19) V(d20) V(d21) V(d22) V(d23) \ |
| 118 | V(d24) V(d25) V(d26) V(d27) V(d28) V(d29) V(d30) V(d31) |
| 119 | // clang-format on |
| 120 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 121 | // CPU Registers. |
| 122 | // |
| 123 | // 1) We would prefer to use an enum, but enum values are assignment- |
| 124 | // compatible with int, which has caused code-generation bugs. |
| 125 | // |
| 126 | // 2) We would prefer to use a class instead of a struct but we don't like |
| 127 | // the register initialization to depend on the particular initialization |
| 128 | // order (which appears to be different on OS X, Linux, and Windows for the |
| 129 | // installed versions of C++ we tried). Using a struct permits C-style |
| 130 | // "initialization". Also, the Register objects cannot be const as this |
| 131 | // forces initialization stubs in MSVC, making us dependent on initialization |
| 132 | // order. |
| 133 | // |
| 134 | // 3) By not using an enum, we are possibly preventing the compiler from |
| 135 | // doing certain constant folds, which may significantly reduce the |
| 136 | // code generated for some assembly instructions (because they boil down |
| 137 | // to a few constants). If this is a problem, we could change the code |
| 138 | // such that we use an enum in optimized mode, and the struct in debug |
| 139 | // mode. This way we get the compile-time error checking in debug mode |
| 140 | // and best performance in optimized code. |
| 141 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 142 | struct Register { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 143 | enum Code { |
| 144 | #define REGISTER_CODE(R) kCode_##R, |
| 145 | GENERAL_REGISTERS(REGISTER_CODE) |
| 146 | #undef REGISTER_CODE |
| 147 | kAfterLast, |
| 148 | kCode_no_reg = -1 |
| 149 | }; |
| 150 | |
| 151 | static const int kNumRegisters = Code::kAfterLast; |
| 152 | |
| 153 | #define REGISTER_COUNT(R) 1 + |
| 154 | static const int kNumAllocatable = |
| 155 | ALLOCATABLE_GENERAL_REGISTERS(REGISTER_COUNT)0; |
| 156 | #undef REGISTER_COUNT |
| 157 | |
| 158 | #define REGISTER_BIT(R) 1 << kCode_##R | |
| 159 | static const RegList kAllocatable = |
| 160 | ALLOCATABLE_GENERAL_REGISTERS(REGISTER_BIT)0; |
| 161 | #undef REGISTER_BIT |
| 162 | |
| 163 | static Register from_code(int code) { |
| 164 | DCHECK(code >= 0); |
| 165 | DCHECK(code < kNumRegisters); |
| 166 | Register r = {code}; |
| 167 | return r; |
| 168 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 169 | bool is_valid() const { return 0 <= reg_code && reg_code < kNumRegisters; } |
| 170 | bool is(Register reg) const { return reg_code == reg.reg_code; } |
| 171 | int code() const { |
| 172 | DCHECK(is_valid()); |
| 173 | return reg_code; |
| 174 | } |
| 175 | int bit() const { |
| 176 | DCHECK(is_valid()); |
| 177 | return 1 << reg_code; |
| 178 | } |
| 179 | void set_code(int code) { |
| 180 | reg_code = code; |
| 181 | DCHECK(is_valid()); |
| 182 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 183 | |
| 184 | #if V8_TARGET_LITTLE_ENDIAN |
| 185 | static const int kMantissaOffset = 0; |
| 186 | static const int kExponentOffset = 4; |
| 187 | #else |
| 188 | static const int kMantissaOffset = 4; |
| 189 | static const int kExponentOffset = 0; |
| 190 | #endif |
| 191 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 192 | // Unfortunately we can't make this private in a struct. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 193 | int reg_code; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 194 | }; |
| 195 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 196 | #define DECLARE_REGISTER(R) const Register R = {Register::kCode_##R}; |
| 197 | GENERAL_REGISTERS(DECLARE_REGISTER) |
| 198 | #undef DECLARE_REGISTER |
| 199 | const Register no_reg = {Register::kCode_no_reg}; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 200 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 201 | // Aliases |
| 202 | const Register kLithiumScratch = r11; // lithium scratch. |
| 203 | const Register kConstantPoolRegister = r28; // Constant pool. |
| 204 | const Register kRootRegister = r29; // Roots array pointer. |
| 205 | const Register cp = r30; // JavaScript context pointer. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 206 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 207 | static const bool kSimpleFPAliasing = true; |
| 208 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 209 | // Double word FP register. |
| 210 | struct DoubleRegister { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 211 | enum Code { |
| 212 | #define REGISTER_CODE(R) kCode_##R, |
| 213 | DOUBLE_REGISTERS(REGISTER_CODE) |
| 214 | #undef REGISTER_CODE |
| 215 | kAfterLast, |
| 216 | kCode_no_reg = -1 |
| 217 | }; |
| 218 | |
| 219 | static const int kNumRegisters = Code::kAfterLast; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 220 | static const int kMaxNumRegisters = kNumRegisters; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 221 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 222 | bool is_valid() const { return 0 <= reg_code && reg_code < kNumRegisters; } |
| 223 | bool is(DoubleRegister reg) const { return reg_code == reg.reg_code; } |
| 224 | int code() const { |
| 225 | DCHECK(is_valid()); |
| 226 | return reg_code; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 227 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 228 | int bit() const { |
| 229 | DCHECK(is_valid()); |
| 230 | return 1 << reg_code; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 231 | } |
| 232 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 233 | static DoubleRegister from_code(int code) { |
| 234 | DoubleRegister r = {code}; |
| 235 | return r; |
| 236 | } |
| 237 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 238 | int reg_code; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 239 | }; |
| 240 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 241 | typedef DoubleRegister FloatRegister; |
| 242 | |
| 243 | // TODO(ppc) Define SIMD registers. |
| 244 | typedef DoubleRegister Simd128Register; |
| 245 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 246 | #define DECLARE_REGISTER(R) \ |
| 247 | const DoubleRegister R = {DoubleRegister::kCode_##R}; |
| 248 | DOUBLE_REGISTERS(DECLARE_REGISTER) |
| 249 | #undef DECLARE_REGISTER |
| 250 | const Register no_dreg = {Register::kCode_no_reg}; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 251 | |
| 252 | // Aliases for double registers. Defined using #define instead of |
| 253 | // "static const DoubleRegister&" because Clang complains otherwise when a |
| 254 | // compilation unit that includes this header doesn't use the variables. |
| 255 | #define kFirstCalleeSavedDoubleReg d14 |
| 256 | #define kLastCalleeSavedDoubleReg d31 |
| 257 | #define kDoubleRegZero d14 |
| 258 | #define kScratchDoubleReg d13 |
| 259 | |
| 260 | Register ToRegister(int num); |
| 261 | |
| 262 | // Coprocessor register |
| 263 | struct CRegister { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 264 | bool is_valid() const { return 0 <= reg_code && reg_code < 8; } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 265 | bool is(CRegister creg) const { return reg_code == creg.reg_code; } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 266 | int code() const { |
| 267 | DCHECK(is_valid()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 268 | return reg_code; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 269 | } |
| 270 | int bit() const { |
| 271 | DCHECK(is_valid()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 272 | return 1 << reg_code; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | // Unfortunately we can't make this private in a struct. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 276 | int reg_code; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 277 | }; |
| 278 | |
| 279 | |
| 280 | const CRegister no_creg = {-1}; |
| 281 | |
| 282 | const CRegister cr0 = {0}; |
| 283 | const CRegister cr1 = {1}; |
| 284 | const CRegister cr2 = {2}; |
| 285 | const CRegister cr3 = {3}; |
| 286 | const CRegister cr4 = {4}; |
| 287 | const CRegister cr5 = {5}; |
| 288 | const CRegister cr6 = {6}; |
| 289 | const CRegister cr7 = {7}; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 290 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 291 | // ----------------------------------------------------------------------------- |
| 292 | // Machine instruction Operands |
| 293 | |
| 294 | #if V8_TARGET_ARCH_PPC64 |
| 295 | const RelocInfo::Mode kRelocInfo_NONEPTR = RelocInfo::NONE64; |
| 296 | #else |
| 297 | const RelocInfo::Mode kRelocInfo_NONEPTR = RelocInfo::NONE32; |
| 298 | #endif |
| 299 | |
| 300 | // Class Operand represents a shifter operand in data processing instructions |
| 301 | class Operand BASE_EMBEDDED { |
| 302 | public: |
| 303 | // immediate |
| 304 | INLINE(explicit Operand(intptr_t immediate, |
| 305 | RelocInfo::Mode rmode = kRelocInfo_NONEPTR)); |
| 306 | INLINE(static Operand Zero()) { return Operand(static_cast<intptr_t>(0)); } |
| 307 | INLINE(explicit Operand(const ExternalReference& f)); |
| 308 | explicit Operand(Handle<Object> handle); |
| 309 | INLINE(explicit Operand(Smi* value)); |
| 310 | |
| 311 | // rm |
| 312 | INLINE(explicit Operand(Register rm)); |
| 313 | |
| 314 | // Return true if this is a register operand. |
| 315 | INLINE(bool is_reg() const); |
| 316 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 317 | bool must_output_reloc_info(const Assembler* assembler) const; |
| 318 | |
| 319 | inline intptr_t immediate() const { |
| 320 | DCHECK(!rm_.is_valid()); |
| 321 | return imm_; |
| 322 | } |
| 323 | |
| 324 | Register rm() const { return rm_; } |
| 325 | |
| 326 | private: |
| 327 | Register rm_; |
| 328 | intptr_t imm_; // valid if rm_ == no_reg |
| 329 | RelocInfo::Mode rmode_; |
| 330 | |
| 331 | friend class Assembler; |
| 332 | friend class MacroAssembler; |
| 333 | }; |
| 334 | |
| 335 | |
| 336 | // Class MemOperand represents a memory operand in load and store instructions |
| 337 | // On PowerPC we have base register + 16bit signed value |
| 338 | // Alternatively we can have a 16bit signed value immediate |
| 339 | class MemOperand BASE_EMBEDDED { |
| 340 | public: |
| 341 | explicit MemOperand(Register rn, int32_t offset = 0); |
| 342 | |
| 343 | explicit MemOperand(Register ra, Register rb); |
| 344 | |
| 345 | int32_t offset() const { |
| 346 | DCHECK(rb_.is(no_reg)); |
| 347 | return offset_; |
| 348 | } |
| 349 | |
| 350 | // PowerPC - base register |
| 351 | Register ra() const { |
| 352 | DCHECK(!ra_.is(no_reg)); |
| 353 | return ra_; |
| 354 | } |
| 355 | |
| 356 | Register rb() const { |
| 357 | DCHECK(offset_ == 0 && !rb_.is(no_reg)); |
| 358 | return rb_; |
| 359 | } |
| 360 | |
| 361 | private: |
| 362 | Register ra_; // base |
| 363 | int32_t offset_; // offset |
| 364 | Register rb_; // index |
| 365 | |
| 366 | friend class Assembler; |
| 367 | }; |
| 368 | |
| 369 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 370 | class DeferredRelocInfo { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 371 | public: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 372 | DeferredRelocInfo() {} |
| 373 | DeferredRelocInfo(int position, RelocInfo::Mode rmode, intptr_t data) |
| 374 | : position_(position), rmode_(rmode), data_(data) {} |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 375 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 376 | int position() const { return position_; } |
| 377 | RelocInfo::Mode rmode() const { return rmode_; } |
| 378 | intptr_t data() const { return data_; } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 379 | |
| 380 | private: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 381 | int position_; |
| 382 | RelocInfo::Mode rmode_; |
| 383 | intptr_t data_; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 384 | }; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 385 | |
| 386 | |
| 387 | class Assembler : public AssemblerBase { |
| 388 | public: |
| 389 | // Create an assembler. Instructions and relocation information are emitted |
| 390 | // into a buffer, with the instructions starting from the beginning and the |
| 391 | // relocation information starting from the end of the buffer. See CodeDesc |
| 392 | // for a detailed comment on the layout (globals.h). |
| 393 | // |
| 394 | // If the provided buffer is NULL, the assembler allocates and grows its own |
| 395 | // buffer, and buffer_size determines the initial buffer size. The buffer is |
| 396 | // owned by the assembler and deallocated upon destruction of the assembler. |
| 397 | // |
| 398 | // If the provided buffer is not NULL, the assembler uses the provided buffer |
| 399 | // for code generation and assumes its size to be buffer_size. If the buffer |
| 400 | // is too small, a fatal error occurs. No deallocation of the buffer is done |
| 401 | // upon destruction of the assembler. |
| 402 | Assembler(Isolate* isolate, void* buffer, int buffer_size); |
| 403 | virtual ~Assembler() {} |
| 404 | |
| 405 | // GetCode emits any pending (non-emitted) code and fills the descriptor |
| 406 | // desc. GetCode() is idempotent; it returns the same result if no other |
| 407 | // Assembler functions are invoked in between GetCode() calls. |
| 408 | void GetCode(CodeDesc* desc); |
| 409 | |
| 410 | // Label operations & relative jumps (PPUM Appendix D) |
| 411 | // |
| 412 | // Takes a branch opcode (cc) and a label (L) and generates |
| 413 | // either a backward branch or a forward branch and links it |
| 414 | // to the label fixup chain. Usage: |
| 415 | // |
| 416 | // Label L; // unbound label |
| 417 | // j(cc, &L); // forward branch to unbound label |
| 418 | // bind(&L); // bind label to the current pc |
| 419 | // j(cc, &L); // backward branch to bound label |
| 420 | // bind(&L); // illegal: a label may be bound only once |
| 421 | // |
| 422 | // Note: The same Label can be used for forward and backward branches |
| 423 | // but it may be bound only once. |
| 424 | |
| 425 | void bind(Label* L); // binds an unbound label L to the current code position |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 426 | |
| 427 | // Links a label at the current pc_offset(). If already bound, returns the |
| 428 | // bound position. If already linked, returns the position of the prior link. |
| 429 | // Otherwise, returns the current pc_offset(). |
| 430 | int link(Label* L); |
| 431 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 432 | // Determines if Label is bound and near enough so that a single |
| 433 | // branch instruction can be used to reach it. |
| 434 | bool is_near(Label* L, Condition cond); |
| 435 | |
| 436 | // Returns the branch offset to the given label from the current code position |
| 437 | // Links the label to the current position if it is still unbound |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 438 | int branch_offset(Label* L) { |
| 439 | if (L->is_unused() && !trampoline_emitted_) { |
| 440 | TrackBranch(); |
| 441 | } |
| 442 | return link(L) - pc_offset(); |
| 443 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 444 | |
| 445 | // Puts a labels target address at the given position. |
| 446 | // The high 8 bits are set to zero. |
| 447 | void label_at_put(Label* L, int at_offset); |
| 448 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 449 | INLINE(static bool IsConstantPoolLoadStart( |
| 450 | Address pc, ConstantPoolEntry::Access* access = nullptr)); |
| 451 | INLINE(static bool IsConstantPoolLoadEnd( |
| 452 | Address pc, ConstantPoolEntry::Access* access = nullptr)); |
| 453 | INLINE(static int GetConstantPoolOffset(Address pc, |
| 454 | ConstantPoolEntry::Access access, |
| 455 | ConstantPoolEntry::Type type)); |
| 456 | INLINE(void PatchConstantPoolAccessInstruction( |
| 457 | int pc_offset, int offset, ConstantPoolEntry::Access access, |
| 458 | ConstantPoolEntry::Type type)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 459 | |
| 460 | // Return the address in the constant pool of the code target address used by |
| 461 | // the branch/call instruction at pc, or the object in a mov. |
| 462 | INLINE(static Address target_constant_pool_address_at( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 463 | Address pc, Address constant_pool, ConstantPoolEntry::Access access, |
| 464 | ConstantPoolEntry::Type type)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 465 | |
| 466 | // Read/Modify the code target address in the branch/call instruction at pc. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 467 | INLINE(static Address target_address_at(Address pc, Address constant_pool)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 468 | INLINE(static void set_target_address_at( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 469 | Isolate* isolate, Address pc, Address constant_pool, Address target, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 470 | ICacheFlushMode icache_flush_mode = FLUSH_ICACHE_IF_NEEDED)); |
| 471 | INLINE(static Address target_address_at(Address pc, Code* code)) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 472 | Address constant_pool = code ? code->constant_pool() : NULL; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 473 | return target_address_at(pc, constant_pool); |
| 474 | } |
| 475 | INLINE(static void set_target_address_at( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 476 | Isolate* isolate, Address pc, Code* code, Address target, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 477 | ICacheFlushMode icache_flush_mode = FLUSH_ICACHE_IF_NEEDED)) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 478 | Address constant_pool = code ? code->constant_pool() : NULL; |
| 479 | set_target_address_at(isolate, pc, constant_pool, target, |
| 480 | icache_flush_mode); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 481 | } |
| 482 | |
| 483 | // Return the code target address at a call site from the return address |
| 484 | // of that call in the instruction stream. |
| 485 | inline static Address target_address_from_return_address(Address pc); |
| 486 | |
| 487 | // Given the address of the beginning of a call, return the address |
| 488 | // in the instruction stream that the call will return to. |
| 489 | INLINE(static Address return_address_from_call_start(Address pc)); |
| 490 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 491 | // This sets the branch destination. |
| 492 | // This is for calls and branches within generated code. |
| 493 | inline static void deserialization_set_special_target_at( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 494 | Isolate* isolate, Address instruction_payload, Code* code, |
| 495 | Address target); |
| 496 | |
| 497 | // This sets the internal reference at the pc. |
| 498 | inline static void deserialization_set_target_internal_reference_at( |
| 499 | Isolate* isolate, Address pc, Address target, |
| 500 | RelocInfo::Mode mode = RelocInfo::INTERNAL_REFERENCE); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 501 | |
| 502 | // Size of an instruction. |
| 503 | static const int kInstrSize = sizeof(Instr); |
| 504 | |
| 505 | // Here we are patching the address in the LUI/ORI instruction pair. |
| 506 | // These values are used in the serialization process and must be zero for |
| 507 | // PPC platform, as Code, Embedded Object or External-reference pointers |
| 508 | // are split across two consecutive instructions and don't exist separately |
| 509 | // in the code, so the serializer should not step forwards in memory after |
| 510 | // a target is resolved and written. |
| 511 | static const int kSpecialTargetSize = 0; |
| 512 | |
| 513 | // Number of instructions to load an address via a mov sequence. |
| 514 | #if V8_TARGET_ARCH_PPC64 |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 515 | static const int kMovInstructionsConstantPool = 1; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 516 | static const int kMovInstructionsNoConstantPool = 5; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 517 | #if defined(V8_PPC_TAGGING_OPT) |
| 518 | static const int kTaggedLoadInstructions = 1; |
| 519 | #else |
| 520 | static const int kTaggedLoadInstructions = 2; |
| 521 | #endif |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 522 | #else |
| 523 | static const int kMovInstructionsConstantPool = 1; |
| 524 | static const int kMovInstructionsNoConstantPool = 2; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 525 | static const int kTaggedLoadInstructions = 1; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 526 | #endif |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 527 | static const int kMovInstructions = FLAG_enable_embedded_constant_pool |
| 528 | ? kMovInstructionsConstantPool |
| 529 | : kMovInstructionsNoConstantPool; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 530 | |
| 531 | // Distance between the instruction referring to the address of the call |
| 532 | // target and the return address. |
| 533 | |
| 534 | // Call sequence is a FIXED_SEQUENCE: |
| 535 | // mov r8, @ call address |
| 536 | // mtlr r8 |
| 537 | // blrl |
| 538 | // @ return address |
| 539 | static const int kCallTargetAddressOffset = |
| 540 | (kMovInstructions + 2) * kInstrSize; |
| 541 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 542 | // Distance between start of patched debug break slot and the emitted address |
| 543 | // to jump to. |
| 544 | // Patched debug break slot code is a FIXED_SEQUENCE: |
| 545 | // mov r0, <address> |
| 546 | // mtlr r0 |
| 547 | // blrl |
| 548 | static const int kPatchDebugBreakSlotAddressOffset = 0 * kInstrSize; |
| 549 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 550 | // This is the length of the code sequence from SetDebugBreakAtSlot() |
| 551 | // FIXED_SEQUENCE |
| 552 | static const int kDebugBreakSlotInstructions = |
| 553 | kMovInstructionsNoConstantPool + 2; |
| 554 | static const int kDebugBreakSlotLength = |
| 555 | kDebugBreakSlotInstructions * kInstrSize; |
| 556 | |
| 557 | static inline int encode_crbit(const CRegister& cr, enum CRBit crbit) { |
| 558 | return ((cr.code() * CRWIDTH) + crbit); |
| 559 | } |
| 560 | |
| 561 | // --------------------------------------------------------------------------- |
| 562 | // Code generation |
| 563 | |
| 564 | // Insert the smallest number of nop instructions |
| 565 | // possible to align the pc offset to a multiple |
| 566 | // of m. m must be a power of 2 (>= 4). |
| 567 | void Align(int m); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 568 | // Insert the smallest number of zero bytes possible to align the pc offset |
| 569 | // to a mulitple of m. m must be a power of 2 (>= 2). |
| 570 | void DataAlign(int m); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 571 | // Aligns code to something that's optimal for a jump target for the platform. |
| 572 | void CodeTargetAlign(); |
| 573 | |
| 574 | // Branch instructions |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 575 | void bclr(BOfield bo, int condition_bit, LKBit lk); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 576 | void blr(); |
| 577 | void bc(int branch_offset, BOfield bo, int condition_bit, LKBit lk = LeaveLK); |
| 578 | void b(int branch_offset, LKBit lk); |
| 579 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 580 | void bcctr(BOfield bo, int condition_bit, LKBit lk); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 581 | void bctr(); |
| 582 | void bctrl(); |
| 583 | |
| 584 | // Convenience branch instructions using labels |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 585 | void b(Label* L, LKBit lk = LeaveLK) { b(branch_offset(L), lk); } |
| 586 | |
| 587 | inline CRegister cmpi_optimization(CRegister cr) { |
| 588 | // Check whether the branch is preceeded by an optimizable cmpi against 0. |
| 589 | // The cmpi can be deleted if it is also preceeded by an instruction that |
| 590 | // sets the register used by the compare and supports a dot form. |
| 591 | unsigned int sradi_mask = kOpcodeMask | kExt2OpcodeVariant2Mask; |
| 592 | unsigned int srawi_mask = kOpcodeMask | kExt2OpcodeMask; |
| 593 | int pos = pc_offset(); |
| 594 | int cmpi_pos = pc_offset() - kInstrSize; |
| 595 | |
| 596 | if (cmpi_pos > 0 && optimizable_cmpi_pos_ == cmpi_pos && |
| 597 | cmpi_cr_.code() == cr.code() && last_bound_pos_ != pos) { |
| 598 | int xpos = cmpi_pos - kInstrSize; |
| 599 | int xinstr = instr_at(xpos); |
| 600 | int cmpi_ra = (instr_at(cmpi_pos) & 0x1f0000) >> 16; |
| 601 | // ra is at the same bit position for the three cases below. |
| 602 | int ra = (xinstr & 0x1f0000) >> 16; |
| 603 | if (cmpi_ra == ra) { |
| 604 | if ((xinstr & sradi_mask) == (EXT2 | SRADIX)) { |
| 605 | cr = cr0; |
| 606 | instr_at_put(xpos, xinstr | SetRC); |
| 607 | pc_ -= kInstrSize; |
| 608 | } else if ((xinstr & srawi_mask) == (EXT2 | SRAWIX)) { |
| 609 | cr = cr0; |
| 610 | instr_at_put(xpos, xinstr | SetRC); |
| 611 | pc_ -= kInstrSize; |
| 612 | } else if ((xinstr & kOpcodeMask) == ANDIx) { |
| 613 | cr = cr0; |
| 614 | pc_ -= kInstrSize; |
| 615 | // nothing to do here since andi. records. |
| 616 | } |
| 617 | // didn't match one of the above, must keep cmpwi. |
| 618 | } |
| 619 | } |
| 620 | return cr; |
| 621 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 622 | |
| 623 | void bc_short(Condition cond, Label* L, CRegister cr = cr7, |
| 624 | LKBit lk = LeaveLK) { |
| 625 | DCHECK(cond != al); |
| 626 | DCHECK(cr.code() >= 0 && cr.code() <= 7); |
| 627 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 628 | cr = cmpi_optimization(cr); |
| 629 | |
| 630 | int b_offset = branch_offset(L); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 631 | |
| 632 | switch (cond) { |
| 633 | case eq: |
| 634 | bc(b_offset, BT, encode_crbit(cr, CR_EQ), lk); |
| 635 | break; |
| 636 | case ne: |
| 637 | bc(b_offset, BF, encode_crbit(cr, CR_EQ), lk); |
| 638 | break; |
| 639 | case gt: |
| 640 | bc(b_offset, BT, encode_crbit(cr, CR_GT), lk); |
| 641 | break; |
| 642 | case le: |
| 643 | bc(b_offset, BF, encode_crbit(cr, CR_GT), lk); |
| 644 | break; |
| 645 | case lt: |
| 646 | bc(b_offset, BT, encode_crbit(cr, CR_LT), lk); |
| 647 | break; |
| 648 | case ge: |
| 649 | bc(b_offset, BF, encode_crbit(cr, CR_LT), lk); |
| 650 | break; |
| 651 | case unordered: |
| 652 | bc(b_offset, BT, encode_crbit(cr, CR_FU), lk); |
| 653 | break; |
| 654 | case ordered: |
| 655 | bc(b_offset, BF, encode_crbit(cr, CR_FU), lk); |
| 656 | break; |
| 657 | case overflow: |
| 658 | bc(b_offset, BT, encode_crbit(cr, CR_SO), lk); |
| 659 | break; |
| 660 | case nooverflow: |
| 661 | bc(b_offset, BF, encode_crbit(cr, CR_SO), lk); |
| 662 | break; |
| 663 | default: |
| 664 | UNIMPLEMENTED(); |
| 665 | } |
| 666 | } |
| 667 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 668 | void bclr(Condition cond, CRegister cr = cr7, LKBit lk = LeaveLK) { |
| 669 | DCHECK(cond != al); |
| 670 | DCHECK(cr.code() >= 0 && cr.code() <= 7); |
| 671 | |
| 672 | cr = cmpi_optimization(cr); |
| 673 | |
| 674 | switch (cond) { |
| 675 | case eq: |
| 676 | bclr(BT, encode_crbit(cr, CR_EQ), lk); |
| 677 | break; |
| 678 | case ne: |
| 679 | bclr(BF, encode_crbit(cr, CR_EQ), lk); |
| 680 | break; |
| 681 | case gt: |
| 682 | bclr(BT, encode_crbit(cr, CR_GT), lk); |
| 683 | break; |
| 684 | case le: |
| 685 | bclr(BF, encode_crbit(cr, CR_GT), lk); |
| 686 | break; |
| 687 | case lt: |
| 688 | bclr(BT, encode_crbit(cr, CR_LT), lk); |
| 689 | break; |
| 690 | case ge: |
| 691 | bclr(BF, encode_crbit(cr, CR_LT), lk); |
| 692 | break; |
| 693 | case unordered: |
| 694 | bclr(BT, encode_crbit(cr, CR_FU), lk); |
| 695 | break; |
| 696 | case ordered: |
| 697 | bclr(BF, encode_crbit(cr, CR_FU), lk); |
| 698 | break; |
| 699 | case overflow: |
| 700 | bclr(BT, encode_crbit(cr, CR_SO), lk); |
| 701 | break; |
| 702 | case nooverflow: |
| 703 | bclr(BF, encode_crbit(cr, CR_SO), lk); |
| 704 | break; |
| 705 | default: |
| 706 | UNIMPLEMENTED(); |
| 707 | } |
| 708 | } |
| 709 | |
| 710 | void isel(Register rt, Register ra, Register rb, int cb); |
| 711 | void isel(Condition cond, Register rt, Register ra, Register rb, |
| 712 | CRegister cr = cr7) { |
| 713 | DCHECK(cond != al); |
| 714 | DCHECK(cr.code() >= 0 && cr.code() <= 7); |
| 715 | |
| 716 | cr = cmpi_optimization(cr); |
| 717 | |
| 718 | switch (cond) { |
| 719 | case eq: |
| 720 | isel(rt, ra, rb, encode_crbit(cr, CR_EQ)); |
| 721 | break; |
| 722 | case ne: |
| 723 | isel(rt, rb, ra, encode_crbit(cr, CR_EQ)); |
| 724 | break; |
| 725 | case gt: |
| 726 | isel(rt, ra, rb, encode_crbit(cr, CR_GT)); |
| 727 | break; |
| 728 | case le: |
| 729 | isel(rt, rb, ra, encode_crbit(cr, CR_GT)); |
| 730 | break; |
| 731 | case lt: |
| 732 | isel(rt, ra, rb, encode_crbit(cr, CR_LT)); |
| 733 | break; |
| 734 | case ge: |
| 735 | isel(rt, rb, ra, encode_crbit(cr, CR_LT)); |
| 736 | break; |
| 737 | case unordered: |
| 738 | isel(rt, ra, rb, encode_crbit(cr, CR_FU)); |
| 739 | break; |
| 740 | case ordered: |
| 741 | isel(rt, rb, ra, encode_crbit(cr, CR_FU)); |
| 742 | break; |
| 743 | case overflow: |
| 744 | isel(rt, ra, rb, encode_crbit(cr, CR_SO)); |
| 745 | break; |
| 746 | case nooverflow: |
| 747 | isel(rt, rb, ra, encode_crbit(cr, CR_SO)); |
| 748 | break; |
| 749 | default: |
| 750 | UNIMPLEMENTED(); |
| 751 | } |
| 752 | } |
| 753 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 754 | void b(Condition cond, Label* L, CRegister cr = cr7, LKBit lk = LeaveLK) { |
| 755 | if (cond == al) { |
| 756 | b(L, lk); |
| 757 | return; |
| 758 | } |
| 759 | |
| 760 | if ((L->is_bound() && is_near(L, cond)) || !is_trampoline_emitted()) { |
| 761 | bc_short(cond, L, cr, lk); |
| 762 | return; |
| 763 | } |
| 764 | |
| 765 | Label skip; |
| 766 | Condition neg_cond = NegateCondition(cond); |
| 767 | bc_short(neg_cond, &skip, cr); |
| 768 | b(L, lk); |
| 769 | bind(&skip); |
| 770 | } |
| 771 | |
| 772 | void bne(Label* L, CRegister cr = cr7, LKBit lk = LeaveLK) { |
| 773 | b(ne, L, cr, lk); |
| 774 | } |
| 775 | void beq(Label* L, CRegister cr = cr7, LKBit lk = LeaveLK) { |
| 776 | b(eq, L, cr, lk); |
| 777 | } |
| 778 | void blt(Label* L, CRegister cr = cr7, LKBit lk = LeaveLK) { |
| 779 | b(lt, L, cr, lk); |
| 780 | } |
| 781 | void bge(Label* L, CRegister cr = cr7, LKBit lk = LeaveLK) { |
| 782 | b(ge, L, cr, lk); |
| 783 | } |
| 784 | void ble(Label* L, CRegister cr = cr7, LKBit lk = LeaveLK) { |
| 785 | b(le, L, cr, lk); |
| 786 | } |
| 787 | void bgt(Label* L, CRegister cr = cr7, LKBit lk = LeaveLK) { |
| 788 | b(gt, L, cr, lk); |
| 789 | } |
| 790 | void bunordered(Label* L, CRegister cr = cr7, LKBit lk = LeaveLK) { |
| 791 | b(unordered, L, cr, lk); |
| 792 | } |
| 793 | void bordered(Label* L, CRegister cr = cr7, LKBit lk = LeaveLK) { |
| 794 | b(ordered, L, cr, lk); |
| 795 | } |
| 796 | void boverflow(Label* L, CRegister cr = cr0, LKBit lk = LeaveLK) { |
| 797 | b(overflow, L, cr, lk); |
| 798 | } |
| 799 | void bnooverflow(Label* L, CRegister cr = cr0, LKBit lk = LeaveLK) { |
| 800 | b(nooverflow, L, cr, lk); |
| 801 | } |
| 802 | |
| 803 | // Decrement CTR; branch if CTR != 0 |
| 804 | void bdnz(Label* L, LKBit lk = LeaveLK) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 805 | bc(branch_offset(L), DCBNZ, 0, lk); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 806 | } |
| 807 | |
| 808 | // Data-processing instructions |
| 809 | |
| 810 | void sub(Register dst, Register src1, Register src2, OEBit s = LeaveOE, |
| 811 | RCBit r = LeaveRC); |
| 812 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 813 | void subc(Register dst, Register src1, Register src2, OEBit s = LeaveOE, |
| 814 | RCBit r = LeaveRC); |
| 815 | void sube(Register dst, Register src1, Register src2, OEBit s = LeaveOE, |
| 816 | RCBit r = LeaveRC); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 817 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 818 | void subfic(Register dst, Register src, const Operand& imm); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 819 | |
| 820 | void add(Register dst, Register src1, Register src2, OEBit s = LeaveOE, |
| 821 | RCBit r = LeaveRC); |
| 822 | |
| 823 | void addc(Register dst, Register src1, Register src2, OEBit o = LeaveOE, |
| 824 | RCBit r = LeaveRC); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 825 | void adde(Register dst, Register src1, Register src2, OEBit o = LeaveOE, |
| 826 | RCBit r = LeaveRC); |
| 827 | void addze(Register dst, Register src1, OEBit o = LeaveOE, RCBit r = LeaveRC); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 828 | |
| 829 | void mullw(Register dst, Register src1, Register src2, OEBit o = LeaveOE, |
| 830 | RCBit r = LeaveRC); |
| 831 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 832 | void mulhw(Register dst, Register src1, Register src2, RCBit r = LeaveRC); |
| 833 | void mulhwu(Register dst, Register src1, Register src2, RCBit r = LeaveRC); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 834 | |
| 835 | void divw(Register dst, Register src1, Register src2, OEBit o = LeaveOE, |
| 836 | RCBit r = LeaveRC); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 837 | void divwu(Register dst, Register src1, Register src2, OEBit o = LeaveOE, |
| 838 | RCBit r = LeaveRC); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 839 | |
| 840 | void addi(Register dst, Register src, const Operand& imm); |
| 841 | void addis(Register dst, Register src, const Operand& imm); |
| 842 | void addic(Register dst, Register src, const Operand& imm); |
| 843 | |
| 844 | void and_(Register dst, Register src1, Register src2, RCBit rc = LeaveRC); |
| 845 | void andc(Register dst, Register src1, Register src2, RCBit rc = LeaveRC); |
| 846 | void andi(Register ra, Register rs, const Operand& imm); |
| 847 | void andis(Register ra, Register rs, const Operand& imm); |
| 848 | void nor(Register dst, Register src1, Register src2, RCBit r = LeaveRC); |
| 849 | void notx(Register dst, Register src, RCBit r = LeaveRC); |
| 850 | void ori(Register dst, Register src, const Operand& imm); |
| 851 | void oris(Register dst, Register src, const Operand& imm); |
| 852 | void orx(Register dst, Register src1, Register src2, RCBit rc = LeaveRC); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 853 | void orc(Register dst, Register src1, Register src2, RCBit rc = LeaveRC); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 854 | void xori(Register dst, Register src, const Operand& imm); |
| 855 | void xoris(Register ra, Register rs, const Operand& imm); |
| 856 | void xor_(Register dst, Register src1, Register src2, RCBit rc = LeaveRC); |
| 857 | void cmpi(Register src1, const Operand& src2, CRegister cr = cr7); |
| 858 | void cmpli(Register src1, const Operand& src2, CRegister cr = cr7); |
| 859 | void cmpwi(Register src1, const Operand& src2, CRegister cr = cr7); |
| 860 | void cmplwi(Register src1, const Operand& src2, CRegister cr = cr7); |
| 861 | void li(Register dst, const Operand& src); |
| 862 | void lis(Register dst, const Operand& imm); |
| 863 | void mr(Register dst, Register src); |
| 864 | |
| 865 | void lbz(Register dst, const MemOperand& src); |
| 866 | void lbzx(Register dst, const MemOperand& src); |
| 867 | void lbzux(Register dst, const MemOperand& src); |
| 868 | void lhz(Register dst, const MemOperand& src); |
| 869 | void lhzx(Register dst, const MemOperand& src); |
| 870 | void lhzux(Register dst, const MemOperand& src); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 871 | void lha(Register dst, const MemOperand& src); |
| 872 | void lhax(Register dst, const MemOperand& src); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 873 | void lwz(Register dst, const MemOperand& src); |
| 874 | void lwzu(Register dst, const MemOperand& src); |
| 875 | void lwzx(Register dst, const MemOperand& src); |
| 876 | void lwzux(Register dst, const MemOperand& src); |
| 877 | void lwa(Register dst, const MemOperand& src); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 878 | void lwax(Register dst, const MemOperand& src); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 879 | void stb(Register dst, const MemOperand& src); |
| 880 | void stbx(Register dst, const MemOperand& src); |
| 881 | void stbux(Register dst, const MemOperand& src); |
| 882 | void sth(Register dst, const MemOperand& src); |
| 883 | void sthx(Register dst, const MemOperand& src); |
| 884 | void sthux(Register dst, const MemOperand& src); |
| 885 | void stw(Register dst, const MemOperand& src); |
| 886 | void stwu(Register dst, const MemOperand& src); |
| 887 | void stwx(Register rs, const MemOperand& src); |
| 888 | void stwux(Register rs, const MemOperand& src); |
| 889 | |
| 890 | void extsb(Register rs, Register ra, RCBit r = LeaveRC); |
| 891 | void extsh(Register rs, Register ra, RCBit r = LeaveRC); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 892 | void extsw(Register rs, Register ra, RCBit r = LeaveRC); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 893 | |
| 894 | void neg(Register rt, Register ra, OEBit o = LeaveOE, RCBit c = LeaveRC); |
| 895 | |
| 896 | #if V8_TARGET_ARCH_PPC64 |
| 897 | void ld(Register rd, const MemOperand& src); |
| 898 | void ldx(Register rd, const MemOperand& src); |
| 899 | void ldu(Register rd, const MemOperand& src); |
| 900 | void ldux(Register rd, const MemOperand& src); |
| 901 | void std(Register rs, const MemOperand& src); |
| 902 | void stdx(Register rs, const MemOperand& src); |
| 903 | void stdu(Register rs, const MemOperand& src); |
| 904 | void stdux(Register rs, const MemOperand& src); |
| 905 | void rldic(Register dst, Register src, int sh, int mb, RCBit r = LeaveRC); |
| 906 | void rldicl(Register dst, Register src, int sh, int mb, RCBit r = LeaveRC); |
| 907 | void rldcl(Register ra, Register rs, Register rb, int mb, RCBit r = LeaveRC); |
| 908 | void rldicr(Register dst, Register src, int sh, int me, RCBit r = LeaveRC); |
| 909 | void rldimi(Register dst, Register src, int sh, int mb, RCBit r = LeaveRC); |
| 910 | void sldi(Register dst, Register src, const Operand& val, RCBit rc = LeaveRC); |
| 911 | void srdi(Register dst, Register src, const Operand& val, RCBit rc = LeaveRC); |
| 912 | void clrrdi(Register dst, Register src, const Operand& val, |
| 913 | RCBit rc = LeaveRC); |
| 914 | void clrldi(Register dst, Register src, const Operand& val, |
| 915 | RCBit rc = LeaveRC); |
| 916 | void sradi(Register ra, Register rs, int sh, RCBit r = LeaveRC); |
| 917 | void srd(Register dst, Register src1, Register src2, RCBit r = LeaveRC); |
| 918 | void sld(Register dst, Register src1, Register src2, RCBit r = LeaveRC); |
| 919 | void srad(Register dst, Register src1, Register src2, RCBit r = LeaveRC); |
| 920 | void rotld(Register ra, Register rs, Register rb, RCBit r = LeaveRC); |
| 921 | void rotldi(Register ra, Register rs, int sh, RCBit r = LeaveRC); |
| 922 | void rotrdi(Register ra, Register rs, int sh, RCBit r = LeaveRC); |
| 923 | void cntlzd_(Register dst, Register src, RCBit rc = LeaveRC); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 924 | void popcntd(Register dst, Register src); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 925 | void mulld(Register dst, Register src1, Register src2, OEBit o = LeaveOE, |
| 926 | RCBit r = LeaveRC); |
| 927 | void divd(Register dst, Register src1, Register src2, OEBit o = LeaveOE, |
| 928 | RCBit r = LeaveRC); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 929 | void divdu(Register dst, Register src1, Register src2, OEBit o = LeaveOE, |
| 930 | RCBit r = LeaveRC); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 931 | #endif |
| 932 | |
| 933 | void rlwinm(Register ra, Register rs, int sh, int mb, int me, |
| 934 | RCBit rc = LeaveRC); |
| 935 | void rlwimi(Register ra, Register rs, int sh, int mb, int me, |
| 936 | RCBit rc = LeaveRC); |
| 937 | void rlwnm(Register ra, Register rs, Register rb, int mb, int me, |
| 938 | RCBit rc = LeaveRC); |
| 939 | void slwi(Register dst, Register src, const Operand& val, RCBit rc = LeaveRC); |
| 940 | void srwi(Register dst, Register src, const Operand& val, RCBit rc = LeaveRC); |
| 941 | void clrrwi(Register dst, Register src, const Operand& val, |
| 942 | RCBit rc = LeaveRC); |
| 943 | void clrlwi(Register dst, Register src, const Operand& val, |
| 944 | RCBit rc = LeaveRC); |
| 945 | void srawi(Register ra, Register rs, int sh, RCBit r = LeaveRC); |
| 946 | void srw(Register dst, Register src1, Register src2, RCBit r = LeaveRC); |
| 947 | void slw(Register dst, Register src1, Register src2, RCBit r = LeaveRC); |
| 948 | void sraw(Register dst, Register src1, Register src2, RCBit r = LeaveRC); |
| 949 | void rotlw(Register ra, Register rs, Register rb, RCBit r = LeaveRC); |
| 950 | void rotlwi(Register ra, Register rs, int sh, RCBit r = LeaveRC); |
| 951 | void rotrwi(Register ra, Register rs, int sh, RCBit r = LeaveRC); |
| 952 | |
| 953 | void cntlzw_(Register dst, Register src, RCBit rc = LeaveRC); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 954 | void popcntw(Register dst, Register src); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 955 | |
| 956 | void subi(Register dst, Register src1, const Operand& src2); |
| 957 | |
| 958 | void cmp(Register src1, Register src2, CRegister cr = cr7); |
| 959 | void cmpl(Register src1, Register src2, CRegister cr = cr7); |
| 960 | void cmpw(Register src1, Register src2, CRegister cr = cr7); |
| 961 | void cmplw(Register src1, Register src2, CRegister cr = cr7); |
| 962 | |
| 963 | void mov(Register dst, const Operand& src); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 964 | void bitwise_mov(Register dst, intptr_t value); |
| 965 | void bitwise_mov32(Register dst, int32_t value); |
| 966 | void bitwise_add32(Register dst, Register src, int32_t value); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 967 | |
| 968 | // Load the position of the label relative to the generated code object |
| 969 | // pointer in a register. |
| 970 | void mov_label_offset(Register dst, Label* label); |
| 971 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 972 | // dst = base + label position + delta |
| 973 | void add_label_offset(Register dst, Register base, Label* label, |
| 974 | int delta = 0); |
| 975 | |
| 976 | // Load the address of the label in a register and associate with an |
| 977 | // internal reference relocation. |
| 978 | void mov_label_addr(Register dst, Label* label); |
| 979 | |
| 980 | // Emit the address of the label (i.e. a jump table entry) and associate with |
| 981 | // an internal reference relocation. |
| 982 | void emit_label_addr(Label* label); |
| 983 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 984 | // Multiply instructions |
| 985 | void mul(Register dst, Register src1, Register src2, OEBit s = LeaveOE, |
| 986 | RCBit r = LeaveRC); |
| 987 | |
| 988 | // Miscellaneous arithmetic instructions |
| 989 | |
| 990 | // Special register access |
| 991 | void crxor(int bt, int ba, int bb); |
| 992 | void crclr(int bt) { crxor(bt, bt, bt); } |
| 993 | void creqv(int bt, int ba, int bb); |
| 994 | void crset(int bt) { creqv(bt, bt, bt); } |
| 995 | void mflr(Register dst); |
| 996 | void mtlr(Register src); |
| 997 | void mtctr(Register src); |
| 998 | void mtxer(Register src); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 999 | void mcrfs(CRegister cr, FPSCRBit bit); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1000 | void mfcr(Register dst); |
| 1001 | #if V8_TARGET_ARCH_PPC64 |
| 1002 | void mffprd(Register dst, DoubleRegister src); |
| 1003 | void mffprwz(Register dst, DoubleRegister src); |
| 1004 | void mtfprd(DoubleRegister dst, Register src); |
| 1005 | void mtfprwz(DoubleRegister dst, Register src); |
| 1006 | void mtfprwa(DoubleRegister dst, Register src); |
| 1007 | #endif |
| 1008 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1009 | void function_descriptor(); |
| 1010 | |
| 1011 | // Exception-generating instructions and debugging support |
| 1012 | void stop(const char* msg, Condition cond = al, |
| 1013 | int32_t code = kDefaultStopCode, CRegister cr = cr7); |
| 1014 | |
| 1015 | void bkpt(uint32_t imm16); // v5 and above |
| 1016 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1017 | void dcbf(Register ra, Register rb); |
| 1018 | void sync(); |
| 1019 | void lwsync(); |
| 1020 | void icbi(Register ra, Register rb); |
| 1021 | void isync(); |
| 1022 | |
| 1023 | // Support for floating point |
| 1024 | void lfd(const DoubleRegister frt, const MemOperand& src); |
| 1025 | void lfdu(const DoubleRegister frt, const MemOperand& src); |
| 1026 | void lfdx(const DoubleRegister frt, const MemOperand& src); |
| 1027 | void lfdux(const DoubleRegister frt, const MemOperand& src); |
| 1028 | void lfs(const DoubleRegister frt, const MemOperand& src); |
| 1029 | void lfsu(const DoubleRegister frt, const MemOperand& src); |
| 1030 | void lfsx(const DoubleRegister frt, const MemOperand& src); |
| 1031 | void lfsux(const DoubleRegister frt, const MemOperand& src); |
| 1032 | void stfd(const DoubleRegister frs, const MemOperand& src); |
| 1033 | void stfdu(const DoubleRegister frs, const MemOperand& src); |
| 1034 | void stfdx(const DoubleRegister frs, const MemOperand& src); |
| 1035 | void stfdux(const DoubleRegister frs, const MemOperand& src); |
| 1036 | void stfs(const DoubleRegister frs, const MemOperand& src); |
| 1037 | void stfsu(const DoubleRegister frs, const MemOperand& src); |
| 1038 | void stfsx(const DoubleRegister frs, const MemOperand& src); |
| 1039 | void stfsux(const DoubleRegister frs, const MemOperand& src); |
| 1040 | |
| 1041 | void fadd(const DoubleRegister frt, const DoubleRegister fra, |
| 1042 | const DoubleRegister frb, RCBit rc = LeaveRC); |
| 1043 | void fsub(const DoubleRegister frt, const DoubleRegister fra, |
| 1044 | const DoubleRegister frb, RCBit rc = LeaveRC); |
| 1045 | void fdiv(const DoubleRegister frt, const DoubleRegister fra, |
| 1046 | const DoubleRegister frb, RCBit rc = LeaveRC); |
| 1047 | void fmul(const DoubleRegister frt, const DoubleRegister fra, |
| 1048 | const DoubleRegister frc, RCBit rc = LeaveRC); |
| 1049 | void fcmpu(const DoubleRegister fra, const DoubleRegister frb, |
| 1050 | CRegister cr = cr7); |
| 1051 | void fmr(const DoubleRegister frt, const DoubleRegister frb, |
| 1052 | RCBit rc = LeaveRC); |
| 1053 | void fctiwz(const DoubleRegister frt, const DoubleRegister frb); |
| 1054 | void fctiw(const DoubleRegister frt, const DoubleRegister frb); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1055 | void frin(const DoubleRegister frt, const DoubleRegister frb, |
| 1056 | RCBit rc = LeaveRC); |
| 1057 | void friz(const DoubleRegister frt, const DoubleRegister frb, |
| 1058 | RCBit rc = LeaveRC); |
| 1059 | void frip(const DoubleRegister frt, const DoubleRegister frb, |
| 1060 | RCBit rc = LeaveRC); |
| 1061 | void frim(const DoubleRegister frt, const DoubleRegister frb, |
| 1062 | RCBit rc = LeaveRC); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1063 | void frsp(const DoubleRegister frt, const DoubleRegister frb, |
| 1064 | RCBit rc = LeaveRC); |
| 1065 | void fcfid(const DoubleRegister frt, const DoubleRegister frb, |
| 1066 | RCBit rc = LeaveRC); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1067 | void fcfidu(const DoubleRegister frt, const DoubleRegister frb, |
| 1068 | RCBit rc = LeaveRC); |
| 1069 | void fcfidus(const DoubleRegister frt, const DoubleRegister frb, |
| 1070 | RCBit rc = LeaveRC); |
| 1071 | void fcfids(const DoubleRegister frt, const DoubleRegister frb, |
| 1072 | RCBit rc = LeaveRC); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1073 | void fctid(const DoubleRegister frt, const DoubleRegister frb, |
| 1074 | RCBit rc = LeaveRC); |
| 1075 | void fctidz(const DoubleRegister frt, const DoubleRegister frb, |
| 1076 | RCBit rc = LeaveRC); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1077 | void fctidu(const DoubleRegister frt, const DoubleRegister frb, |
| 1078 | RCBit rc = LeaveRC); |
| 1079 | void fctiduz(const DoubleRegister frt, const DoubleRegister frb, |
| 1080 | RCBit rc = LeaveRC); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1081 | void fsel(const DoubleRegister frt, const DoubleRegister fra, |
| 1082 | const DoubleRegister frc, const DoubleRegister frb, |
| 1083 | RCBit rc = LeaveRC); |
| 1084 | void fneg(const DoubleRegister frt, const DoubleRegister frb, |
| 1085 | RCBit rc = LeaveRC); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1086 | void mtfsb0(FPSCRBit bit, RCBit rc = LeaveRC); |
| 1087 | void mtfsb1(FPSCRBit bit, RCBit rc = LeaveRC); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1088 | void mtfsfi(int bf, int immediate, RCBit rc = LeaveRC); |
| 1089 | void mffs(const DoubleRegister frt, RCBit rc = LeaveRC); |
| 1090 | void mtfsf(const DoubleRegister frb, bool L = 1, int FLM = 0, bool W = 0, |
| 1091 | RCBit rc = LeaveRC); |
| 1092 | void fsqrt(const DoubleRegister frt, const DoubleRegister frb, |
| 1093 | RCBit rc = LeaveRC); |
| 1094 | void fabs(const DoubleRegister frt, const DoubleRegister frb, |
| 1095 | RCBit rc = LeaveRC); |
| 1096 | void fmadd(const DoubleRegister frt, const DoubleRegister fra, |
| 1097 | const DoubleRegister frc, const DoubleRegister frb, |
| 1098 | RCBit rc = LeaveRC); |
| 1099 | void fmsub(const DoubleRegister frt, const DoubleRegister fra, |
| 1100 | const DoubleRegister frc, const DoubleRegister frb, |
| 1101 | RCBit rc = LeaveRC); |
| 1102 | |
| 1103 | // Pseudo instructions |
| 1104 | |
| 1105 | // Different nop operations are used by the code generator to detect certain |
| 1106 | // states of the generated code. |
| 1107 | enum NopMarkerTypes { |
| 1108 | NON_MARKING_NOP = 0, |
| 1109 | GROUP_ENDING_NOP, |
| 1110 | DEBUG_BREAK_NOP, |
| 1111 | // IC markers. |
| 1112 | PROPERTY_ACCESS_INLINED, |
| 1113 | PROPERTY_ACCESS_INLINED_CONTEXT, |
| 1114 | PROPERTY_ACCESS_INLINED_CONTEXT_DONT_DELETE, |
| 1115 | // Helper values. |
| 1116 | LAST_CODE_MARKER, |
| 1117 | FIRST_IC_MARKER = PROPERTY_ACCESS_INLINED |
| 1118 | }; |
| 1119 | |
| 1120 | void nop(int type = 0); // 0 is the default non-marking type. |
| 1121 | |
| 1122 | void push(Register src) { |
| 1123 | #if V8_TARGET_ARCH_PPC64 |
| 1124 | stdu(src, MemOperand(sp, -kPointerSize)); |
| 1125 | #else |
| 1126 | stwu(src, MemOperand(sp, -kPointerSize)); |
| 1127 | #endif |
| 1128 | } |
| 1129 | |
| 1130 | void pop(Register dst) { |
| 1131 | #if V8_TARGET_ARCH_PPC64 |
| 1132 | ld(dst, MemOperand(sp)); |
| 1133 | #else |
| 1134 | lwz(dst, MemOperand(sp)); |
| 1135 | #endif |
| 1136 | addi(sp, sp, Operand(kPointerSize)); |
| 1137 | } |
| 1138 | |
| 1139 | void pop() { addi(sp, sp, Operand(kPointerSize)); } |
| 1140 | |
| 1141 | // Jump unconditionally to given label. |
| 1142 | void jmp(Label* L) { b(L); } |
| 1143 | |
| 1144 | // Check the code size generated from label to here. |
| 1145 | int SizeOfCodeGeneratedSince(Label* label) { |
| 1146 | return pc_offset() - label->pos(); |
| 1147 | } |
| 1148 | |
| 1149 | // Check the number of instructions generated from label to here. |
| 1150 | int InstructionsGeneratedSince(Label* label) { |
| 1151 | return SizeOfCodeGeneratedSince(label) / kInstrSize; |
| 1152 | } |
| 1153 | |
| 1154 | // Class for scoping postponing the trampoline pool generation. |
| 1155 | class BlockTrampolinePoolScope { |
| 1156 | public: |
| 1157 | explicit BlockTrampolinePoolScope(Assembler* assem) : assem_(assem) { |
| 1158 | assem_->StartBlockTrampolinePool(); |
| 1159 | } |
| 1160 | ~BlockTrampolinePoolScope() { assem_->EndBlockTrampolinePool(); } |
| 1161 | |
| 1162 | private: |
| 1163 | Assembler* assem_; |
| 1164 | |
| 1165 | DISALLOW_IMPLICIT_CONSTRUCTORS(BlockTrampolinePoolScope); |
| 1166 | }; |
| 1167 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1168 | // Class for scoping disabling constant pool entry merging |
| 1169 | class BlockConstantPoolEntrySharingScope { |
| 1170 | public: |
| 1171 | explicit BlockConstantPoolEntrySharingScope(Assembler* assem) |
| 1172 | : assem_(assem) { |
| 1173 | assem_->StartBlockConstantPoolEntrySharing(); |
| 1174 | } |
| 1175 | ~BlockConstantPoolEntrySharingScope() { |
| 1176 | assem_->EndBlockConstantPoolEntrySharing(); |
| 1177 | } |
| 1178 | |
| 1179 | private: |
| 1180 | Assembler* assem_; |
| 1181 | |
| 1182 | DISALLOW_IMPLICIT_CONSTRUCTORS(BlockConstantPoolEntrySharingScope); |
| 1183 | }; |
| 1184 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1185 | // Debugging |
| 1186 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1187 | // Mark generator continuation. |
| 1188 | void RecordGeneratorContinuation(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1189 | |
| 1190 | // Mark address of a debug break slot. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1191 | void RecordDebugBreakSlot(RelocInfo::Mode mode); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1192 | |
| 1193 | // Record the AST id of the CallIC being compiled, so that it can be placed |
| 1194 | // in the relocation information. |
| 1195 | void SetRecordedAstId(TypeFeedbackId ast_id) { |
| 1196 | // Causes compiler to fail |
| 1197 | // DCHECK(recorded_ast_id_.IsNone()); |
| 1198 | recorded_ast_id_ = ast_id; |
| 1199 | } |
| 1200 | |
| 1201 | TypeFeedbackId RecordedAstId() { |
| 1202 | // Causes compiler to fail |
| 1203 | // DCHECK(!recorded_ast_id_.IsNone()); |
| 1204 | return recorded_ast_id_; |
| 1205 | } |
| 1206 | |
| 1207 | void ClearRecordedAstId() { recorded_ast_id_ = TypeFeedbackId::None(); } |
| 1208 | |
| 1209 | // Record a comment relocation entry that can be used by a disassembler. |
| 1210 | // Use --code-comments to enable. |
| 1211 | void RecordComment(const char* msg); |
| 1212 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1213 | // Record a deoptimization reason that can be used by a log or cpu profiler. |
| 1214 | // Use --trace-deopt to enable. |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1215 | void RecordDeoptReason(const int reason, int raw_position, int id); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1216 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1217 | // Writes a single byte or word of data in the code stream. Used |
| 1218 | // for inline tables, e.g., jump-tables. |
| 1219 | void db(uint8_t data); |
| 1220 | void dd(uint32_t data); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1221 | void dq(uint64_t data); |
| 1222 | void dp(uintptr_t data); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1223 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1224 | AssemblerPositionsRecorder* positions_recorder() { |
| 1225 | return &positions_recorder_; |
| 1226 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1227 | |
| 1228 | // Read/patch instructions |
| 1229 | Instr instr_at(int pos) { return *reinterpret_cast<Instr*>(buffer_ + pos); } |
| 1230 | void instr_at_put(int pos, Instr instr) { |
| 1231 | *reinterpret_cast<Instr*>(buffer_ + pos) = instr; |
| 1232 | } |
| 1233 | static Instr instr_at(byte* pc) { return *reinterpret_cast<Instr*>(pc); } |
| 1234 | static void instr_at_put(byte* pc, Instr instr) { |
| 1235 | *reinterpret_cast<Instr*>(pc) = instr; |
| 1236 | } |
| 1237 | static Condition GetCondition(Instr instr); |
| 1238 | |
| 1239 | static bool IsLis(Instr instr); |
| 1240 | static bool IsLi(Instr instr); |
| 1241 | static bool IsAddic(Instr instr); |
| 1242 | static bool IsOri(Instr instr); |
| 1243 | |
| 1244 | static bool IsBranch(Instr instr); |
| 1245 | static Register GetRA(Instr instr); |
| 1246 | static Register GetRB(Instr instr); |
| 1247 | #if V8_TARGET_ARCH_PPC64 |
| 1248 | static bool Is64BitLoadIntoR12(Instr instr1, Instr instr2, Instr instr3, |
| 1249 | Instr instr4, Instr instr5); |
| 1250 | #else |
| 1251 | static bool Is32BitLoadIntoR12(Instr instr1, Instr instr2); |
| 1252 | #endif |
| 1253 | |
| 1254 | static bool IsCmpRegister(Instr instr); |
| 1255 | static bool IsCmpImmediate(Instr instr); |
| 1256 | static bool IsRlwinm(Instr instr); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1257 | static bool IsAndi(Instr instr); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1258 | #if V8_TARGET_ARCH_PPC64 |
| 1259 | static bool IsRldicl(Instr instr); |
| 1260 | #endif |
| 1261 | static bool IsCrSet(Instr instr); |
| 1262 | static Register GetCmpImmediateRegister(Instr instr); |
| 1263 | static int GetCmpImmediateRawImmediate(Instr instr); |
| 1264 | static bool IsNop(Instr instr, int type = NON_MARKING_NOP); |
| 1265 | |
| 1266 | // Postpone the generation of the trampoline pool for the specified number of |
| 1267 | // instructions. |
| 1268 | void BlockTrampolinePoolFor(int instructions); |
| 1269 | void CheckTrampolinePool(); |
| 1270 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1271 | // For mov. Return the number of actual instructions required to |
| 1272 | // load the operand into a register. This can be anywhere from |
| 1273 | // one (constant pool small section) to five instructions (full |
| 1274 | // 64-bit sequence). |
| 1275 | // |
| 1276 | // The value returned is only valid as long as no entries are added to the |
| 1277 | // constant pool between this call and the actual instruction being emitted. |
| 1278 | int instructions_required_for_mov(Register dst, const Operand& src) const; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1279 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1280 | // Decide between using the constant pool vs. a mov immediate sequence. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1281 | bool use_constant_pool_for_mov(Register dst, const Operand& src, |
| 1282 | bool canOptimize) const; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1283 | |
| 1284 | // The code currently calls CheckBuffer() too often. This has the side |
| 1285 | // effect of randomly growing the buffer in the middle of multi-instruction |
| 1286 | // sequences. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1287 | // |
| 1288 | // This function allows outside callers to check and grow the buffer |
| 1289 | void EnsureSpaceFor(int space_needed); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1290 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1291 | int EmitConstantPool() { return constant_pool_builder_.Emit(this); } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1292 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1293 | bool ConstantPoolAccessIsInOverflow() const { |
| 1294 | return constant_pool_builder_.NextAccess(ConstantPoolEntry::INTPTR) == |
| 1295 | ConstantPoolEntry::OVERFLOWED; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1296 | } |
| 1297 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1298 | Label* ConstantPoolPosition() { |
| 1299 | return constant_pool_builder_.EmittedPosition(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1300 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1301 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1302 | void EmitRelocations(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1303 | |
| 1304 | protected: |
| 1305 | // Relocation for a type-recording IC has the AST id added to it. This |
| 1306 | // member variable is a way to pass the information from the call site to |
| 1307 | // the relocation info. |
| 1308 | TypeFeedbackId recorded_ast_id_; |
| 1309 | |
| 1310 | int buffer_space() const { return reloc_info_writer.pos() - pc_; } |
| 1311 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1312 | // Decode instruction(s) at pos and return backchain to previous |
| 1313 | // label reference or kEndOfChain. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1314 | int target_at(int pos); |
| 1315 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1316 | // Patch instruction(s) at pos to target target_pos (e.g. branch) |
| 1317 | void target_at_put(int pos, int target_pos, bool* is_branch = nullptr); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1318 | |
| 1319 | // Record reloc info for current pc_ |
| 1320 | void RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data = 0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1321 | ConstantPoolEntry::Access ConstantPoolAddEntry(RelocInfo::Mode rmode, |
| 1322 | intptr_t value) { |
| 1323 | bool sharing_ok = RelocInfo::IsNone(rmode) || |
| 1324 | !(serializer_enabled() || rmode < RelocInfo::CELL || |
| 1325 | is_constant_pool_entry_sharing_blocked()); |
| 1326 | return constant_pool_builder_.AddEntry(pc_offset(), value, sharing_ok); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1327 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1328 | ConstantPoolEntry::Access ConstantPoolAddEntry(double value) { |
| 1329 | return constant_pool_builder_.AddEntry(pc_offset(), value); |
| 1330 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1331 | |
| 1332 | // Block the emission of the trampoline pool before pc_offset. |
| 1333 | void BlockTrampolinePoolBefore(int pc_offset) { |
| 1334 | if (no_trampoline_pool_before_ < pc_offset) |
| 1335 | no_trampoline_pool_before_ = pc_offset; |
| 1336 | } |
| 1337 | |
| 1338 | void StartBlockTrampolinePool() { trampoline_pool_blocked_nesting_++; } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1339 | void EndBlockTrampolinePool() { |
| 1340 | int count = --trampoline_pool_blocked_nesting_; |
| 1341 | if (count == 0) CheckTrampolinePoolQuick(); |
| 1342 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1343 | bool is_trampoline_pool_blocked() const { |
| 1344 | return trampoline_pool_blocked_nesting_ > 0; |
| 1345 | } |
| 1346 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1347 | void StartBlockConstantPoolEntrySharing() { |
| 1348 | constant_pool_entry_sharing_blocked_nesting_++; |
| 1349 | } |
| 1350 | void EndBlockConstantPoolEntrySharing() { |
| 1351 | constant_pool_entry_sharing_blocked_nesting_--; |
| 1352 | } |
| 1353 | bool is_constant_pool_entry_sharing_blocked() const { |
| 1354 | return constant_pool_entry_sharing_blocked_nesting_ > 0; |
| 1355 | } |
| 1356 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1357 | bool has_exception() const { return internal_trampoline_exception_; } |
| 1358 | |
| 1359 | bool is_trampoline_emitted() const { return trampoline_emitted_; } |
| 1360 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1361 | private: |
| 1362 | // Code generation |
| 1363 | // The relocation writer's position is at least kGap bytes below the end of |
| 1364 | // the generated instructions. This is so that multi-instruction sequences do |
| 1365 | // not have to check for overflow. The same is true for writes of large |
| 1366 | // relocation info entries. |
| 1367 | static const int kGap = 32; |
| 1368 | |
| 1369 | // Repeated checking whether the trampoline pool should be emitted is rather |
| 1370 | // expensive. By default we only check again once a number of instructions |
| 1371 | // has been generated. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1372 | int next_trampoline_check_; // pc offset of next buffer check. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1373 | |
| 1374 | // Emission of the trampoline pool may be blocked in some code sequences. |
| 1375 | int trampoline_pool_blocked_nesting_; // Block emission if this is not zero. |
| 1376 | int no_trampoline_pool_before_; // Block emission before this pc offset. |
| 1377 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1378 | // Do not share constant pool entries. |
| 1379 | int constant_pool_entry_sharing_blocked_nesting_; |
| 1380 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1381 | // Relocation info generation |
| 1382 | // Each relocation is encoded as a variable size value |
| 1383 | static const int kMaxRelocSize = RelocInfoWriter::kMaxSize; |
| 1384 | RelocInfoWriter reloc_info_writer; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1385 | std::vector<DeferredRelocInfo> relocations_; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1386 | |
| 1387 | // The bound position, before this we cannot do instruction elimination. |
| 1388 | int last_bound_pos_; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1389 | // Optimizable cmpi information. |
| 1390 | int optimizable_cmpi_pos_; |
| 1391 | CRegister cmpi_cr_; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1392 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1393 | ConstantPoolBuilder constant_pool_builder_; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1394 | |
| 1395 | // Code emission |
| 1396 | inline void CheckBuffer(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1397 | void GrowBuffer(int needed = 0); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1398 | inline void emit(Instr x); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1399 | inline void TrackBranch(); |
| 1400 | inline void UntrackBranch(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1401 | inline void CheckTrampolinePoolQuick(); |
| 1402 | |
| 1403 | // Instruction generation |
| 1404 | void a_form(Instr instr, DoubleRegister frt, DoubleRegister fra, |
| 1405 | DoubleRegister frb, RCBit r); |
| 1406 | void d_form(Instr instr, Register rt, Register ra, const intptr_t val, |
| 1407 | bool signed_disp); |
| 1408 | void x_form(Instr instr, Register ra, Register rs, Register rb, RCBit r); |
| 1409 | void xo_form(Instr instr, Register rt, Register ra, Register rb, OEBit o, |
| 1410 | RCBit r); |
| 1411 | void md_form(Instr instr, Register ra, Register rs, int shift, int maskbit, |
| 1412 | RCBit r); |
| 1413 | void mds_form(Instr instr, Register ra, Register rs, Register rb, int maskbit, |
| 1414 | RCBit r); |
| 1415 | |
| 1416 | // Labels |
| 1417 | void print(Label* L); |
| 1418 | int max_reach_from(int pos); |
| 1419 | void bind_to(Label* L, int pos); |
| 1420 | void next(Label* L); |
| 1421 | |
| 1422 | class Trampoline { |
| 1423 | public: |
| 1424 | Trampoline() { |
| 1425 | next_slot_ = 0; |
| 1426 | free_slot_count_ = 0; |
| 1427 | } |
| 1428 | Trampoline(int start, int slot_count) { |
| 1429 | next_slot_ = start; |
| 1430 | free_slot_count_ = slot_count; |
| 1431 | } |
| 1432 | int take_slot() { |
| 1433 | int trampoline_slot = kInvalidSlotPos; |
| 1434 | if (free_slot_count_ <= 0) { |
| 1435 | // We have run out of space on trampolines. |
| 1436 | // Make sure we fail in debug mode, so we become aware of each case |
| 1437 | // when this happens. |
| 1438 | DCHECK(0); |
| 1439 | // Internal exception will be caught. |
| 1440 | } else { |
| 1441 | trampoline_slot = next_slot_; |
| 1442 | free_slot_count_--; |
| 1443 | next_slot_ += kTrampolineSlotsSize; |
| 1444 | } |
| 1445 | return trampoline_slot; |
| 1446 | } |
| 1447 | |
| 1448 | private: |
| 1449 | int next_slot_; |
| 1450 | int free_slot_count_; |
| 1451 | }; |
| 1452 | |
| 1453 | int32_t get_trampoline_entry(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1454 | int tracked_branch_count_; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1455 | // If trampoline is emitted, generated code is becoming large. As |
| 1456 | // this is already a slow case which can possibly break our code |
| 1457 | // generation for the extreme case, we use this information to |
| 1458 | // trigger different mode of branch instruction generation, where we |
| 1459 | // no longer use a single branch instruction. |
| 1460 | bool trampoline_emitted_; |
| 1461 | static const int kTrampolineSlotsSize = kInstrSize; |
| 1462 | static const int kMaxCondBranchReach = (1 << (16 - 1)) - 1; |
| 1463 | static const int kMaxBlockTrampolineSectionSize = 64 * kInstrSize; |
| 1464 | static const int kInvalidSlotPos = -1; |
| 1465 | |
| 1466 | Trampoline trampoline_; |
| 1467 | bool internal_trampoline_exception_; |
| 1468 | |
| 1469 | friend class RegExpMacroAssemblerPPC; |
| 1470 | friend class RelocInfo; |
| 1471 | friend class CodePatcher; |
| 1472 | friend class BlockTrampolinePoolScope; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1473 | AssemblerPositionsRecorder positions_recorder_; |
| 1474 | friend class AssemblerPositionsRecorder; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1475 | friend class EnsureSpace; |
| 1476 | }; |
| 1477 | |
| 1478 | |
| 1479 | class EnsureSpace BASE_EMBEDDED { |
| 1480 | public: |
| 1481 | explicit EnsureSpace(Assembler* assembler) { assembler->CheckBuffer(); } |
| 1482 | }; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1483 | } // namespace internal |
| 1484 | } // namespace v8 |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1485 | |
| 1486 | #endif // V8_PPC_ASSEMBLER_PPC_H_ |