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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.
#ifndef V8_EXECUTION_X64_FRAME_CONSTANTS_X64_H_
#define V8_EXECUTION_X64_FRAME_CONSTANTS_X64_H_
#include "src/base/bits.h"
#include "src/base/macros.h"
#include "src/codegen/x64/register-x64.h"
#include "src/execution/frame-constants.h"
namespace v8 {
namespace internal {
class EntryFrameConstants : public AllStatic {
public:
#ifdef V8_TARGET_OS_WIN
static constexpr int kCalleeSaveXMMRegisters = 10;
static constexpr int kXMMRegisterSize = 16;
static constexpr int kXMMRegistersBlockSize =
kXMMRegisterSize * kCalleeSaveXMMRegisters;
// This is the offset to where JSEntry pushes the current value of
// Isolate::c_entry_fp onto the stack.
// On x64, there are 7 pushq() and 3 Push() calls between setting up rbp and
// pushing the c_entry_fp, plus we manually allocate kXMMRegistersBlockSize
// bytes on the stack.
static constexpr int kCallerFPOffset = -3 * kSystemPointerSize +
-7 * kSystemPointerSize -
kXMMRegistersBlockSize;
// Stack offsets for arguments passed to JSEntry.
static constexpr int kArgcOffset = 6 * kSystemPointerSize;
static constexpr int kArgvOffset = 7 * kSystemPointerSize;
#else
// This is the offset to where JSEntry pushes the current value of
// Isolate::c_entry_fp onto the stack.
// On x64, there are 5 pushq() and 3 Push() calls between setting up rbp and
// pushing the c_entry_fp.
static constexpr int kCallerFPOffset =
-3 * kSystemPointerSize + -5 * kSystemPointerSize;
#endif
};
class WasmCompileLazyFrameConstants : public TypedFrameConstants {
public:
static constexpr int kNumberOfSavedGpParamRegs = 6;
static constexpr int kNumberOfSavedFpParamRegs = 6;
// FP-relative.
static constexpr int kWasmInstanceOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(0);
static constexpr int kFixedFrameSizeFromFp =
TypedFrameConstants::kFixedFrameSizeFromFp +
kNumberOfSavedGpParamRegs * kSystemPointerSize +
kNumberOfSavedFpParamRegs * kSimd128Size;
};
// Frame constructed by the {WasmDebugBreak} builtin.
// After pushing the frame type marker, the builtin pushes all Liftoff cache
// registers (see liftoff-assembler-defs.h).
class WasmDebugBreakFrameConstants : public TypedFrameConstants {
public:
static constexpr RegList kPushedGpRegs =
Register::ListOf(rax, rcx, rdx, rbx, rsi, rdi, r9);
static constexpr RegList kPushedFpRegs =
DoubleRegister::ListOf(xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7);
static constexpr int kNumPushedGpRegisters =
base::bits::CountPopulation(kPushedGpRegs);
static constexpr int kNumPushedFpRegisters =
base::bits::CountPopulation(kPushedFpRegs);
static constexpr int kLastPushedGpRegisterOffset =
-kFixedFrameSizeFromFp - kNumPushedGpRegisters * kSystemPointerSize;
static constexpr int kLastPushedFpRegisterOffset =
kLastPushedGpRegisterOffset - kNumPushedFpRegisters * kSimd128Size;
// Offsets are fp-relative.
static int GetPushedGpRegisterOffset(int reg_code) {
DCHECK_NE(0, kPushedGpRegs & (1 << reg_code));
uint32_t lower_regs = kPushedGpRegs & ((uint32_t{1} << reg_code) - 1);
return kLastPushedGpRegisterOffset +
base::bits::CountPopulation(lower_regs) * kSystemPointerSize;
}
static int GetPushedFpRegisterOffset(int reg_code) {
DCHECK_NE(0, kPushedFpRegs & (1 << reg_code));
uint32_t lower_regs = kPushedFpRegs & ((uint32_t{1} << reg_code) - 1);
return kLastPushedFpRegisterOffset +
base::bits::CountPopulation(lower_regs) * kSimd128Size;
}
};
} // namespace internal
} // namespace v8
#endif // V8_EXECUTION_X64_FRAME_CONSTANTS_X64_H_
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