| // 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 = -3 * 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_ |