Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 | // Rrdistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Rrdistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Rrdistributions 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, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 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 | |
| 28 | #include <stdlib.h> |
| 29 | |
| 30 | #include "src/v8.h" |
| 31 | |
| 32 | #include "src/base/platform/platform.h" |
| 33 | #include "src/code-stubs.h" |
| 34 | #include "src/factory.h" |
| 35 | #include "src/macro-assembler.h" |
| 36 | #include "src/simulator.h" |
| 37 | #include "test/cctest/cctest.h" |
| 38 | #include "test/cctest/test-code-stubs.h" |
| 39 | |
| 40 | using namespace v8::internal; |
| 41 | |
| 42 | #define __ masm. |
| 43 | |
| 44 | ConvertDToIFunc MakeConvertDToIFuncTrampoline(Isolate* isolate, |
| 45 | Register source_reg, |
| 46 | Register destination_reg, |
| 47 | bool inline_fastpath) { |
| 48 | // Allocate an executable page of memory. |
| 49 | size_t actual_size = 4 * Assembler::kMinimalBufferSize; |
| 50 | byte* buffer = static_cast<byte*>( |
| 51 | v8::base::OS::Allocate(actual_size, &actual_size, true)); |
| 52 | CHECK(buffer); |
| 53 | HandleScope handles(isolate); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 54 | MacroAssembler masm(isolate, buffer, static_cast<int>(actual_size), |
| 55 | v8::internal::CodeObjectRequired::kYes); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 56 | DoubleToIStub stub(isolate, source_reg, destination_reg, 0, true, |
| 57 | inline_fastpath); |
| 58 | |
| 59 | byte* start = stub.GetCode()->instruction_start(); |
| 60 | Label done; |
| 61 | |
| 62 | __ SetStackPointer(csp); |
| 63 | __ PushCalleeSavedRegisters(); |
| 64 | __ Mov(jssp, csp); |
| 65 | __ SetStackPointer(jssp); |
| 66 | |
| 67 | // Push the double argument. |
| 68 | __ Push(d0); |
| 69 | __ Mov(source_reg, jssp); |
| 70 | |
| 71 | MacroAssembler::PushPopQueue queue(&masm); |
| 72 | |
| 73 | // Save registers make sure they don't get clobbered. |
| 74 | int source_reg_offset = kDoubleSize; |
| 75 | int reg_num = 0; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 76 | for (; reg_num < Register::kNumRegisters; ++reg_num) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 77 | Register reg = Register::from_code(reg_num); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 78 | if (reg.IsAllocatable()) { |
| 79 | if (!reg.is(destination_reg)) { |
| 80 | queue.Queue(reg); |
| 81 | source_reg_offset += kPointerSize; |
| 82 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 83 | } |
| 84 | } |
| 85 | // Re-push the double argument. |
| 86 | queue.Queue(d0); |
| 87 | |
| 88 | queue.PushQueued(); |
| 89 | |
| 90 | // Call through to the actual stub |
| 91 | if (inline_fastpath) { |
| 92 | __ Ldr(d0, MemOperand(source_reg)); |
| 93 | __ TryConvertDoubleToInt64(destination_reg, d0, &done); |
| 94 | if (destination_reg.is(source_reg)) { |
| 95 | // Restore clobbered source_reg. |
| 96 | __ add(source_reg, jssp, Operand(source_reg_offset)); |
| 97 | } |
| 98 | } |
| 99 | __ Call(start, RelocInfo::EXTERNAL_REFERENCE); |
| 100 | __ bind(&done); |
| 101 | |
| 102 | __ Drop(1, kDoubleSize); |
| 103 | |
| 104 | // // Make sure no registers have been unexpectedly clobbered |
| 105 | for (--reg_num; reg_num >= 0; --reg_num) { |
| 106 | Register reg = Register::from_code(reg_num); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 107 | if (reg.IsAllocatable()) { |
| 108 | if (!reg.is(destination_reg)) { |
| 109 | __ Pop(ip0); |
| 110 | __ cmp(reg, ip0); |
| 111 | __ Assert(eq, kRegisterWasClobbered); |
| 112 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 113 | } |
| 114 | } |
| 115 | |
| 116 | __ Drop(1, kDoubleSize); |
| 117 | |
| 118 | if (!destination_reg.is(x0)) |
| 119 | __ Mov(x0, destination_reg); |
| 120 | |
| 121 | // Restore callee save registers. |
| 122 | __ Mov(csp, jssp); |
| 123 | __ SetStackPointer(csp); |
| 124 | __ PopCalleeSavedRegisters(); |
| 125 | |
| 126 | __ Ret(); |
| 127 | |
| 128 | CodeDesc desc; |
| 129 | masm.GetCode(&desc); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 130 | Assembler::FlushICache(isolate, buffer, actual_size); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 131 | return (reinterpret_cast<ConvertDToIFunc>( |
| 132 | reinterpret_cast<intptr_t>(buffer))); |
| 133 | } |
| 134 | |
| 135 | #undef __ |
| 136 | |
| 137 | |
| 138 | static Isolate* GetIsolateFrom(LocalContext* context) { |
| 139 | return reinterpret_cast<Isolate*>((*context)->GetIsolate()); |
| 140 | } |
| 141 | |
| 142 | |
| 143 | int32_t RunGeneratedCodeCallWrapper(ConvertDToIFunc func, |
| 144 | double from) { |
| 145 | #ifdef USE_SIMULATOR |
| 146 | Simulator::CallArgument args[] = { |
| 147 | Simulator::CallArgument(from), |
| 148 | Simulator::CallArgument::End() |
| 149 | }; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 150 | return static_cast<int32_t>(Simulator::current(CcTest::i_isolate()) |
| 151 | ->CallInt64(FUNCTION_ADDR(func), args)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 152 | #else |
| 153 | return (*func)(from); |
| 154 | #endif |
| 155 | } |
| 156 | |
| 157 | |
| 158 | TEST(ConvertDToI) { |
| 159 | CcTest::InitializeVM(); |
| 160 | LocalContext context; |
| 161 | Isolate* isolate = GetIsolateFrom(&context); |
| 162 | HandleScope scope(isolate); |
| 163 | |
| 164 | #if DEBUG |
| 165 | // Verify that the tests actually work with the C version. In the release |
| 166 | // code, the compiler optimizes it away because it's all constant, but does it |
| 167 | // wrong, triggering an assert on gcc. |
| 168 | RunAllTruncationTests(&ConvertDToICVersion); |
| 169 | #endif |
| 170 | |
| 171 | Register source_registers[] = {jssp, x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, |
| 172 | x10, x11, x12, x13, x14, x15, x18, x19, x20, |
| 173 | x21, x22, x23, x24}; |
| 174 | Register dest_registers[] = {x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, |
| 175 | x12, x13, x14, x15, x18, x19, x20, x21, x22, x23, |
| 176 | x24}; |
| 177 | |
| 178 | for (size_t s = 0; s < sizeof(source_registers) / sizeof(Register); s++) { |
| 179 | for (size_t d = 0; d < sizeof(dest_registers) / sizeof(Register); d++) { |
| 180 | RunAllTruncationTests( |
| 181 | RunGeneratedCodeCallWrapper, |
| 182 | MakeConvertDToIFuncTrampoline(isolate, |
| 183 | source_registers[s], |
| 184 | dest_registers[d], |
| 185 | false)); |
| 186 | RunAllTruncationTests( |
| 187 | RunGeneratedCodeCallWrapper, |
| 188 | MakeConvertDToIFuncTrampoline(isolate, |
| 189 | source_registers[s], |
| 190 | dest_registers[d], |
| 191 | true)); |
| 192 | } |
| 193 | } |
| 194 | } |