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fixed possible mistake in mulcmv 

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@2944 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
nakeee 2009-04-09 22:07:58 +00:00
parent 5184b578c8
commit f0641ebe3f
2 changed files with 8 additions and 6 deletions
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13
Source/Plugins/Plugin_DSP_LLE/Src/DSPInterpreter.cpp
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@ -616,24 +616,25 @@ void mulcmvz(const UDSPInstruction& opc)
// MULCMV
// 110s t11r xxxx xxxx
// Multiply mid part of accumulator register $acS.m by high part $axS.h of
// Multiply mid part of accumulator register $acS.m by high part $axT.h of
// secondary accumulator $axT (treat them both as signed). Move product
// register before multiplication to accumulator $acR.
// possible mistake in duddie's doc axT.h rather than axS.h
void mulcmv(const UDSPInstruction& opc)
{
s64 TempProd = dsp_get_long_prod();
s64 tempProd = dsp_get_long_prod();
// update prod
u8 sreg = (opc.hex >> 12) & 0x1;
u8 treg = (opc.hex >> 11) & 0x1;
s64 Prod = (s64)dsp_get_acc_m(sreg) * (s64)dsp_get_ax_h(sreg) * GetMultiplyModifier();
dsp_set_long_prod(Prod);
s64 prod = (s64)dsp_get_acc_m(sreg) * (s64)dsp_get_ax_h(treg) * GetMultiplyModifier();
dsp_set_long_prod(prod);
// update acc
u8 rreg = (opc.hex >> 8) & 0x1;
dsp_set_long_acc(rreg, TempProd);
dsp_set_long_acc(rreg, tempProd);
Update_SR_Register64(TempProd);
Update_SR_Register64(tempProd);
}
// CMPAR

1
Source/Plugins/Plugin_DSP_LLE/Src/DSPInterpreter.h
View File

@ -83,6 +83,7 @@ void neg(const UDSPInstruction& opc);
void addax(const UDSPInstruction& opc);
void addr(const UDSPInstruction& opc);
void subr(const UDSPInstruction& opc);
void subp(const UDSPInstruction& opc);
void subax(const UDSPInstruction& opc);
void addis(const UDSPInstruction& opc);
void addi(const UDSPInstruction& opc);