codegen-s390.cc 1.22 KB
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// Copyright 2015 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_S390

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#include <memory>

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#include "src/codegen.h"
#include "src/macro-assembler.h"
#include "src/s390/simulator-s390.h"

namespace v8 {
namespace internal {

#define __ masm.

UnaryMathFunctionWithIsolate CreateSqrtFunction(Isolate* isolate) {
#if defined(USE_SIMULATOR)
  return nullptr;
#else
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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);

  __ MovFromFloatParameter(d0);
  __ sqdbr(d0, d0);
  __ MovToFloatResult(d0);
  __ Ret();

  CodeDesc desc;
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  masm.GetCode(isolate, &desc);
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  DCHECK(ABI_USES_FUNCTION_DESCRIPTORS || !RelocInfo::RequiresRelocation(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);
#endif
}

#undef __

}  // namespace internal
}  // namespace v8

#endif  // V8_TARGET_ARCH_S390