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https://github.com/patchzyy/wiicompiled
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patchzyy
128 lines
4.8 KiB
C++
128 lines
4.8 KiB
C++
#pragma once
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// Pure integer PowerPC semantics, together with the declarations of the
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// integer, condition/SPR and system helpers the host runtime implements out of
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// line. Nothing here depends on another isa/ header beyond the configuration.
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#include "ppc_isa_config.h"
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#include <cstdint>
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#include <cstdlib>
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#include <limits>
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inline uint32_t PpcRotl32Inline(uint32_t value, uint32_t shift)
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{
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return __builtin_rotateleft32(value, shift);
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}
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extern "C" uint32_t OSSystemCall();
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extern "C" int32_t memset_zero_32(int32_t address);
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extern "C" void OS_HLE_ProcessAlarms(int maxToProcess);
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extern "C" uint32_t PPC_Mcrxr(uint32_t crField);
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extern "C" uint32_t PPC_ReadSpr(uint32_t spr);
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extern "C" void PPC_WriteSpr(uint32_t spr, uint32_t value);
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extern "C" uint32_t PPC_CrSetBit(uint32_t bitIndex, uint32_t value);
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extern "C" uint32_t PPC_CrLogical(uint32_t op, uint32_t bt, uint32_t ba, uint32_t bb);
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extern "C" uint32_t PPC_Mcrf(uint32_t dstField, uint32_t srcField);
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// Time base helpers (PowerPC 'mftb' / 'mftbu') - declared so generated code can call them.
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extern "C" uint32_t PPC_Mftb();
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extern "C" uint32_t PPC_Mftbu();
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// Carry helpers used by translated arithmetic that depends on XER[CA].
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extern "C" uint32_t PPC_UpdateCarryAdd(uint32_t lhs, uint32_t rhs, uint32_t carryIn);
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extern "C" uint32_t PPC_UpdateCarrySub(uint32_t lhs, uint32_t rhs);
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extern "C" uint32_t PPC_UpdateCarryShiftRight(uint32_t value, uint32_t shift);
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extern "C" uint32_t PPC_GetCarry();
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extern "C" uint32_t PPC_Addo(uint32_t lhs, uint32_t rhs);
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extern "C" uint32_t PPC_Addco(uint32_t lhs, uint32_t rhs);
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extern "C" uint32_t PPC_Addeo(uint32_t lhs, uint32_t rhs);
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extern "C" uint32_t PPC_Addmeo(uint32_t value);
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extern "C" uint32_t PPC_Addzeo(uint32_t value);
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extern "C" uint32_t PPC_Subfo(uint32_t subtrahend, uint32_t minuend);
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extern "C" uint32_t PPC_Subfco(uint32_t subtrahend, uint32_t minuend);
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extern "C" uint32_t PPC_Subfeo(uint32_t subtrahend, uint32_t minuend);
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extern "C" uint32_t PPC_Subfmeo(uint32_t value);
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extern "C" uint32_t PPC_Subfzeo(uint32_t value);
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extern "C" uint32_t PPC_Nego(uint32_t value);
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extern "C" uint32_t PPC_Mullwo(uint32_t lhs, uint32_t rhs);
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extern "C" uint32_t PPC_Divwo(uint32_t lhs, uint32_t rhs);
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extern "C" uint32_t PPC_Divwuo(uint32_t lhs, uint32_t rhs);
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extern "C" void PPC_Lswi(uint32_t rD, uint32_t addr, uint32_t byteCount);
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extern "C" void PPC_Lswx(uint32_t rD, uint32_t addr);
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extern "C" void PPC_Stswi(uint32_t rS, uint32_t addr, uint32_t byteCount);
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extern "C" void PPC_Stswx(uint32_t rS, uint32_t addr);
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extern "C" uint32_t PPC_Lwarx(uint32_t addr);
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extern "C" uint32_t PPC_Stwcx(uint32_t addr, uint32_t value);
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extern "C" uint32_t PPC_Mcrfs(uint32_t dstField, uint32_t srcField);
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extern "C" uint32_t PPC_Eciwx(uint32_t addr);
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extern "C" void PPC_Ecowx(uint32_t addr, uint32_t value);
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extern "C" void PPC_TrapWord(uint32_t trapOptions, uint32_t lhs, uint32_t rhs);
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extern "C" uint32_t PPC_Cntlzw(uint32_t value);
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MKW_PPC_FORCE_INLINE uint32_t PPC_CntlzwInline(uint32_t value)
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{
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return value == 0 ? 32u : static_cast<uint32_t>(__builtin_clz(value));
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}
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// Byte-reverse helpers (PowerPC 'lwbrx' / 'stwbrx' / 'lhbrx' / 'sthbrx')
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extern "C" uint32_t PPC_LoadWordByteReverse(uint32_t addr);
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extern "C" void PPC_StoreWordByteReverse(uint32_t addr, uint32_t value);
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extern "C" uint32_t PPC_LoadHalfwordByteReverse(uint32_t addr);
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extern "C" void PPC_StoreHalfwordByteReverse(uint32_t addr, uint32_t value);
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template <typename T>
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inline int32_t CompareUnsigned(T a, T b) {
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uint32_t ua = static_cast<uint32_t>(a);
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uint32_t ub = static_cast<uint32_t>(b);
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if (ua < ub) return -1;
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if (ua > ub) return 1;
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return 0;
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}
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template <int Bits>
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inline int32_t SignExtend(uint32_t val) {
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struct { int32_t x : Bits; } s;
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s.x = val;
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return s.x;
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}
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inline int32_t ArithmeticShiftRight(int32_t val, int amount) {
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return val >> amount;
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}
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inline uint32_t PPC_Slw(uint32_t value, uint32_t amount)
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{
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return (amount & 0x20u) != 0 ? 0u : value << (amount & 0x1Fu);
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}
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inline uint32_t PPC_Srw(uint32_t value, uint32_t amount)
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{
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return (amount & 0x20u) != 0 ? 0u : value >> (amount & 0x1Fu);
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}
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inline uint32_t PPC_Sraw(uint32_t value, uint32_t amount)
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{
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if ((amount & 0x20u) != 0)
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{
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return (value & 0x80000000u) != 0 ? 0xFFFFFFFFu : 0u;
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}
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return static_cast<uint32_t>(static_cast<int32_t>(value) >> (amount & 0x1Fu));
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}
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inline uint32_t PPC_Divwu(uint32_t dividend, uint32_t divisor)
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{
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// Gekko does not raise a program exception for non-OE division by zero.
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// Match the hardware result used by Dolphin's interpreter/JIT.
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return divisor == 0 ? 0u : dividend / divisor;
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}
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inline int32_t PPC_Divw(int32_t dividend, int32_t divisor)
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{
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if (divisor == 0 || (dividend == std::numeric_limits<int32_t>::min() && divisor == -1))
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return dividend < 0 ? -1 : 0;
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return dividend / divisor;
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}
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