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ppcexec: Add comments for macros.

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joevt 2024-03-26 18:53:34 -07:00 committed by dingusdev
parent 60a4738694
commit d8129bd643
1 changed files with 10 additions and 0 deletions
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cpu/ppc/ppcexec.cpp
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@ -580,6 +580,16 @@ void ppc_exec_dbg(volatile uint32_t start_addr, volatile uint32_t size)
}
}
/*
Opcode table macros:
- d is for dot (RC).
- o is for overflow (OV).
- c is for carry CARRY0/CARRY1. It also works for other options:
SHFT0/SHFT1, RIGHT0/LEFT1, uint8_t/uint16_t/uint32_t, and int8_t/int16_t.
- t is for two. It's like d for dot but for when the function used for Rc=0 and Rc=1
is the same (usually for illegal_op).
*/
#define OP(opcode, subopcode, fn) \
SubOpcode ## opcode ## Grabber[((subopcode)<<1)] = fn;