1 // Copyright 2011 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef V8_EXECUTION_MIPS64_FRAME_CONSTANTS_MIPS64_H_ 6 #define V8_EXECUTION_MIPS64_FRAME_CONSTANTS_MIPS64_H_ 7 8 #include "src/base/bits.h" 9 #include "src/base/macros.h" 10 #include "src/codegen/register.h" 11 #include "src/execution/frame-constants.h" 12 13 namespace v8 { 14 namespace internal { 15 16 class EntryFrameConstants : public AllStatic { 17 public: 18 // This is the offset to where JSEntry pushes the current value of 19 // Isolate::c_entry_fp onto the stack. 20 static constexpr int kCallerFPOffset = -3 * kSystemPointerSize; 21 }; 22 23 class WasmCompileLazyFrameConstants : public TypedFrameConstants { 24 public: 25 static constexpr int kNumberOfSavedGpParamRegs = 7; 26 static constexpr int kNumberOfSavedFpParamRegs = 7; 27 static constexpr int kNumberOfSavedAllParamRegs = 14; 28 29 // FP-relative. 30 // See Generate_WasmCompileLazy in builtins-mips64.cc. 31 static constexpr int kWasmInstanceOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(6); 32 33 static constexpr int kFixedFrameSizeFromFp = 34 TypedFrameConstants::kFixedFrameSizeFromFp + 35 kNumberOfSavedGpParamRegs * kPointerSize + 36 kNumberOfSavedFpParamRegs * kSimd128Size; 37 }; 38 39 // Frame constructed by the {WasmDebugBreak} builtin. 40 // After pushing the frame type marker, the builtin pushes all Liftoff cache 41 // registers (see liftoff-assembler-defs.h). 42 class WasmDebugBreakFrameConstants : public TypedFrameConstants { 43 public: 44 // {v0, v1, a0, a1, a2, a3, a4, a5, a6, a7, t0, t1, t2, s7} 45 static constexpr RegList kPushedGpRegs = {v0, v1, a0, a1, a2, a3, a4, 46 a5, a6, a7, t0, t1, t2, s7}; 47 // {f0, f2, f4, f6, f8, f10, f12, f14, f16, f18, f20, f22, f24, f26} 48 static constexpr DoubleRegList kPushedFpRegs = { 49 f0, f2, f4, f6, f8, f10, f12, f14, f16, f18, f20, f22, f24, f26}; 50 51 static constexpr int kNumPushedGpRegisters = kPushedGpRegs.Count(); 52 static constexpr int kNumPushedFpRegisters = kPushedFpRegs.Count(); 53 54 static constexpr int kLastPushedGpRegisterOffset = 55 -kFixedFrameSizeFromFp - kNumPushedGpRegisters * kSystemPointerSize; 56 static constexpr int kLastPushedFpRegisterOffset = 57 kLastPushedGpRegisterOffset - kNumPushedFpRegisters * kDoubleSize; 58 59 // Offsets are fp-relative. GetPushedGpRegisterOffset(int reg_code)60 static int GetPushedGpRegisterOffset(int reg_code) { 61 DCHECK_NE(0, kPushedGpRegs.bits() & (1 << reg_code)); 62 uint32_t lower_regs = 63 kPushedGpRegs.bits() & ((uint32_t{1} << reg_code) - 1); 64 return kLastPushedGpRegisterOffset + 65 base::bits::CountPopulation(lower_regs) * kSystemPointerSize; 66 } 67 GetPushedFpRegisterOffset(int reg_code)68 static int GetPushedFpRegisterOffset(int reg_code) { 69 DCHECK_NE(0, kPushedFpRegs.bits() & (1 << reg_code)); 70 uint32_t lower_regs = 71 kPushedFpRegs.bits() & ((uint32_t{1} << reg_code) - 1); 72 return kLastPushedFpRegisterOffset + 73 base::bits::CountPopulation(lower_regs) * kDoubleSize; 74 } 75 }; 76 77 } // namespace internal 78 } // namespace v8 79 80 #endif // V8_EXECUTION_MIPS64_FRAME_CONSTANTS_MIPS64_H_ 81