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melonDS
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clarify

This commit is contained in:
Jaklyy 2024-09-16 13:27:36 -04:00
parent ac8c942565
commit e2f3dd1e6f
1 changed files with 4 additions and 2 deletions
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6
src/ARMInterpreter_ALU.cpp
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@ -766,7 +766,8 @@ void A_MUL(ARM* cpu)
u32 res = rm * rs;
if (((cpu->CurInstr >> 16) & 0xF) != 15) // check arm7
// all multiply instructions fail writes to r15 on arm7/9
if (((cpu->CurInstr >> 16) & 0xF) != 15)
cpu->R[(cpu->CurInstr >> 16) & 0xF] = res;
if (cpu->CurInstr & (1<<20))
@ -798,7 +799,7 @@ void A_MLA(ARM* cpu)
u32 res = (rm * rs) + rn;
if (((cpu->CurInstr >> 16) & 0xF) != 15) // check arm7
if (((cpu->CurInstr >> 16) & 0xF) != 15)
cpu->R[(cpu->CurInstr >> 16) & 0xF] = res;
if (cpu->CurInstr & (1<<20))
@ -1110,6 +1111,7 @@ void A_QADD(ARM* cpu)
cpu->CPSR |= 0x08000000;
}
// all saturated math instructions fail writes to r15
if (((cpu->CurInstr >> 12) & 0xF) != 15)
cpu->R[(cpu->CurInstr >> 12) & 0xF] = res;