1 // Copyright 2013 the V8 project authors. All rights reserved.
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3 // modification, are permitted provided that the following conditions are
6 // * Rrdistributions of source code must retain the above copyright
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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"
40 using namespace v8::internal;
44 ConvertDToIFunc MakeConvertDToIFuncTrampoline(Isolate* isolate,
46 Register destination_reg,
47 bool inline_fastpath) {
48 // Allocate an executable page of memory.
50 byte* buffer = static_cast<byte*>(v8::base::OS::Allocate(
51 Assembler::kMinimalBufferSize, &actual_size, true));
53 HandleScope handles(isolate);
54 MacroAssembler masm(isolate, buffer, static_cast<int>(actual_size));
55 DoubleToIStub stub(isolate, source_reg, destination_reg, 0, true,
58 byte* start = stub.GetCode()->instruction_start();
61 // Save callee save registers.
62 __ Push(r7, r6, r5, r4);
65 // For softfp, move the input value into d0.
66 if (!masm.use_eabi_hardfloat()) {
69 // Push the double argument.
70 __ sub(sp, sp, Operand(kDoubleSize));
72 if (!source_reg.is(sp)) {
73 __ mov(source_reg, sp);
76 // Save registers make sure they don't get clobbered.
77 int source_reg_offset = kDoubleSize;
79 for (;reg_num < Register::NumAllocatableRegisters(); ++reg_num) {
80 Register reg = Register::from_code(reg_num);
81 if (!reg.is(destination_reg)) {
83 source_reg_offset += kPointerSize;
87 // Re-push the double argument.
88 __ sub(sp, sp, Operand(kDoubleSize));
91 // Call through to the actual stub
92 if (inline_fastpath) {
93 __ vldr(d0, MemOperand(source_reg));
94 __ TryInlineTruncateDoubleToI(destination_reg, d0, &done);
95 if (destination_reg.is(source_reg) && !source_reg.is(sp)) {
96 // Restore clobbered source_reg.
97 __ add(source_reg, sp, Operand(source_reg_offset));
100 __ Call(start, RelocInfo::EXTERNAL_REFERENCE);
103 __ add(sp, sp, Operand(kDoubleSize));
105 // Make sure no registers have been unexpectedly clobbered
106 for (--reg_num; reg_num >= 0; --reg_num) {
107 Register reg = Register::from_code(reg_num);
108 if (!reg.is(destination_reg)) {
109 __ ldr(ip, MemOperand(sp, 0));
111 __ Assert(eq, kRegisterWasClobbered);
112 __ add(sp, sp, Operand(kPointerSize));
116 __ add(sp, sp, Operand(kDoubleSize));
118 if (!destination_reg.is(r0))
119 __ mov(r0, destination_reg);
121 // Restore callee save registers.
123 __ Pop(r7, r6, r5, r4);
129 CpuFeatures::FlushICache(buffer, actual_size);
130 return (reinterpret_cast<ConvertDToIFunc>(
131 reinterpret_cast<intptr_t>(buffer)));
137 static Isolate* GetIsolateFrom(LocalContext* context) {
138 return reinterpret_cast<Isolate*>((*context)->GetIsolate());
142 int32_t RunGeneratedCodeCallWrapper(ConvertDToIFunc func,
145 return CALL_GENERATED_FP_INT(func, from, 0);
147 return (*func)(from);
153 CcTest::InitializeVM();
154 LocalContext context;
155 Isolate* isolate = GetIsolateFrom(&context);
156 HandleScope scope(isolate);
159 // Verify that the tests actually work with the C version. In the release
160 // code, the compiler optimizes it away because it's all constant, but does it
161 // wrong, triggering an assert on gcc.
162 RunAllTruncationTests(&ConvertDToICVersion);
165 Register source_registers[] = {sp, r0, r1, r2, r3, r4, r5, r6, r7};
166 Register dest_registers[] = {r0, r1, r2, r3, r4, r5, r6, r7};
168 for (size_t s = 0; s < sizeof(source_registers) / sizeof(Register); s++) {
169 for (size_t d = 0; d < sizeof(dest_registers) / sizeof(Register); d++) {
170 RunAllTruncationTests(
171 RunGeneratedCodeCallWrapper,
172 MakeConvertDToIFuncTrampoline(isolate,
176 RunAllTruncationTests(
177 RunGeneratedCodeCallWrapper,
178 MakeConvertDToIFuncTrampoline(isolate,