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PowerPC recompiler rework (#641)
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Exzap 2025-04-26 17:59:32 +02:00 • committed by GitHub
parent 06233e3462
commit b089ae5b32
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54 changed files with 15433 additions and 12397 deletions
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20
src/Cafe/HW/Espresso/EspressoISA.h
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@ -91,13 +91,15 @@ namespace Espresso
BCCTR = 528
};
enum class OPCODE_31
enum class Opcode31
{
TW = 4,
MFTB = 371,
};
inline PrimaryOpcode GetPrimaryOpcode(uint32 opcode) { return (PrimaryOpcode)(opcode >> 26); };
inline Opcode19 GetGroup19Opcode(uint32 opcode) { return (Opcode19)((opcode >> 1) & 0x3FF); };
inline Opcode31 GetGroup31Opcode(uint32 opcode) { return (Opcode31)((opcode >> 1) & 0x3FF); };
struct BOField
{
@ -132,6 +134,12 @@ namespace Espresso
uint8 bo;
};
// returns true if LK bit is set, only valid for branch instructions
inline bool DecodeLK(uint32 opcode)
{
return (opcode & 1) != 0;
}
inline void _decodeForm_I(uint32 opcode, uint32& LI, bool& AA, bool& LK)
{
LI = opcode & 0x3fffffc;
@ -183,13 +191,7 @@ namespace Espresso
_decodeForm_D_branch(opcode, BD, BO, BI, AA, LK);
}
inline void decodeOp_BCLR(uint32 opcode, BOField& BO, uint32& BI, bool& LK)
{
// form XL (with BD field expected to be zero)
_decodeForm_XL(opcode, BO, BI, LK);
}
inline void decodeOp_BCCTR(uint32 opcode, BOField& BO, uint32& BI, bool& LK)
inline void decodeOp_BCSPR(uint32 opcode, BOField& BO, uint32& BI, bool& LK) // BCLR and BCSPR
{
// form XL (with BD field expected to be zero)
_decodeForm_XL(opcode, BO, BI, LK);