1 // Copyright 2014 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_PPC_FRAME_CONSTANTS_PPC_H_ 6 #define V8_EXECUTION_PPC_FRAME_CONSTANTS_PPC_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 // Need to take constant pool into account. 19 static constexpr int kCallerFPOffset = FLAG_enable_embedded_constant_pool 20 ? -4 * kSystemPointerSize 21 : -3 * kSystemPointerSize; 22 }; 23 24 class WasmCompileLazyFrameConstants : public TypedFrameConstants { 25 public: 26 static constexpr int kNumberOfSavedGpParamRegs = 7; 27 static constexpr int kNumberOfSavedFpParamRegs = 8; 28 29 // FP-relative. 30 // The instance is pushed as part of the saved registers. Being in {r10}, it 31 // is the first register pushed (highest register code in 32 // {wasm::kGpParamRegisters}). 33 static constexpr int kWasmInstanceOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(0); 34 static constexpr int kFixedFrameSizeFromFp = 35 TypedFrameConstants::kFixedFrameSizeFromFp + 36 kNumberOfSavedGpParamRegs * kSystemPointerSize + 37 kNumberOfSavedFpParamRegs * kDoubleSize + 38 kNumberOfSavedFpParamRegs * kSimd128Size; 39 }; 40 41 // Frame constructed by the {WasmDebugBreak} builtin. 42 // After pushing the frame type marker, the builtin pushes all Liftoff cache 43 // registers (see liftoff-assembler-defs.h). 44 class WasmDebugBreakFrameConstants : public TypedFrameConstants { 45 public: 46 static constexpr RegList kPushedGpRegs = {r3, r4, r5, r6, r7, 47 r8, r9, r10, r11, cp}; 48 49 static constexpr DoubleRegList kPushedFpRegs = {d0, d1, d2, d3, d4, d5, d6, 50 d7, d8, d9, d10, d11, d12}; 51 52 static constexpr Simd128RegList kPushedSimd128Regs = { 53 v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12}; 54 55 static constexpr int kNumPushedGpRegisters = kPushedGpRegs.Count(); 56 static constexpr int kNumPushedFpRegisters = kPushedFpRegs.Count(); 57 58 static constexpr int kLastPushedGpRegisterOffset = 59 -TypedFrameConstants::kFixedFrameSizeFromFp - 60 kSystemPointerSize * kNumPushedGpRegisters; 61 static constexpr int kLastPushedFpRegisterOffset = 62 kLastPushedGpRegisterOffset - kDoubleSize * kNumPushedFpRegisters; 63 64 // Offsets are fp-relative. GetPushedGpRegisterOffset(int reg_code)65 static int GetPushedGpRegisterOffset(int reg_code) { 66 DCHECK_NE(0, kPushedGpRegs.bits() & (1 << reg_code)); 67 uint32_t lower_regs = 68 kPushedGpRegs.bits() & ((uint32_t{1} << reg_code) - 1); 69 return kLastPushedGpRegisterOffset + 70 base::bits::CountPopulation(lower_regs) * kSystemPointerSize; 71 } 72 GetPushedFpRegisterOffset(int reg_code)73 static int GetPushedFpRegisterOffset(int reg_code) { 74 DCHECK_NE(0, kPushedFpRegs.bits() & (1 << reg_code)); 75 uint32_t lower_regs = 76 kPushedFpRegs.bits() & ((uint32_t{1} << reg_code) - 1); 77 return kLastPushedFpRegisterOffset + 78 base::bits::CountPopulation(lower_regs) * kSimd128Size; 79 } 80 }; 81 82 } // namespace internal 83 } // namespace v8 84 85 #endif // V8_EXECUTION_PPC_FRAME_CONSTANTS_PPC_H_ 86