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