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// Copyright 2014 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_S390_FRAME_CONSTANTS_S390_H_
#define V8_EXECUTION_S390_FRAME_CONSTANTS_S390_H_
#include "src/base/bits.h"
#include "src/base/macros.h"
#include "src/execution/frame-constants.h"
namespace v8 {
namespace internal {
class EntryFrameConstants : public AllStatic {
public:
static constexpr int kCallerFPOffset =
-(StandardFrameConstants::kFixedFrameSizeFromFp + kSystemPointerSize);
// Stack offsets for arguments passed to JSEntry.
static constexpr int kArgvOffset = 20 * kSystemPointerSize;
};
class WasmCompileLazyFrameConstants : public TypedFrameConstants {
public:
static constexpr int kNumberOfSavedGpParamRegs = 4;
#ifdef V8_TARGET_ARCH_S390X
static constexpr int kNumberOfSavedFpParamRegs = 4;
#else
static constexpr int kNumberOfSavedFpParamRegs = 2;
#endif
// FP-relative.
static constexpr int kWasmInstanceOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(0);
static constexpr int kFixedFrameSizeFromFp =
TypedFrameConstants::kFixedFrameSizeFromFp +
kNumberOfSavedGpParamRegs * kSystemPointerSize +
kNumberOfSavedFpParamRegs * kDoubleSize;
};
// 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:
// {r2, r3, r4, r5, r6, r7, r8}
static constexpr uint32_t kPushedGpRegs = 0b111111100;
// {d0 .. d12}
static constexpr uint32_t kPushedFpRegs = 0b1111111111111;
static constexpr int kNumPushedGpRegisters =
base::bits::CountPopulation(kPushedGpRegs);
static constexpr int kNumPushedFpRegisters =
base::bits::CountPopulation(kPushedFpRegs);
static constexpr int kLastPushedGpRegisterOffset =
-TypedFrameConstants::kFixedFrameSizeFromFp -
kSystemPointerSize * kNumPushedGpRegisters;
static constexpr int kLastPushedFpRegisterOffset =
kLastPushedGpRegisterOffset - kDoubleSize * kNumPushedFpRegisters;
// 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) * kDoubleSize;
}
};
} // namespace internal
} // namespace v8
#endif // V8_EXECUTION_S390_FRAME_CONSTANTS_S390_H_
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