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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
#include <memory>
#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
size_t allocated = 0;
byte* buffer =
AllocateSystemPage(isolate->heap()->GetRandomMmapAddr(), &allocated);
if (buffer == nullptr) return nullptr;
MacroAssembler masm(isolate, buffer, static_cast<int>(allocated),
CodeObjectRequired::kNo);
__ MovFromFloatParameter(d0);
__ sqdbr(d0, d0);
__ MovToFloatResult(d0);
__ Ret();
CodeDesc desc;
masm.GetCode(isolate, &desc);
DCHECK(ABI_USES_FUNCTION_DESCRIPTORS ||
!RelocInfo::RequiresRelocation(isolate, desc));
Assembler::FlushICache(isolate, buffer, allocated);
CHECK(base::OS::SetPermissions(buffer, allocated,
base::OS::MemoryPermission::kReadExecute));
return FUNCTION_CAST<UnaryMathFunctionWithIsolate>(buffer);
#endif
}
#undef __
} // namespace internal
} // namespace v8
#endif // V8_TARGET_ARCH_S390
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