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// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#if V8_TARGET_ARCH_X64
#include "src/codegen.h"
#include "src/isolate.h"
#include "src/macro-assembler.h"
#include "src/x64/assembler-x64-inl.h"
namespace v8 {
namespace internal {
#define __ masm.
UnaryMathFunctionWithIsolate CreateSqrtFunction(Isolate* isolate) {
size_t allocated = 0;
byte* buffer = AllocatePage(isolate->heap()->GetRandomMmapAddr(), &allocated);
if (buffer == nullptr) return nullptr;
MacroAssembler masm(isolate, buffer, static_cast<int>(allocated),
CodeObjectRequired::kNo);
// xmm0: raw double input.
// Move double input into registers.
__ Sqrtsd(xmm0, xmm0);
__ Ret();
CodeDesc desc;
masm.GetCode(isolate, &desc);
DCHECK(!RelocInfo::RequiresRelocation(desc));
Assembler::FlushICache(buffer, allocated);
CHECK(SetPermissions(buffer, allocated, PageAllocator::kReadExecute));
return FUNCTION_CAST<UnaryMathFunctionWithIsolate>(buffer);
}
#undef __
} // namespace internal
} // namespace v8
#endif // V8_TARGET_ARCH_X64
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