diff options
Diffstat (limited to 'Source/Core/DSPCore/Src/DspIntArithmetic.cpp')
| -rw-r--r-- | Source/Core/DSPCore/Src/DspIntArithmetic.cpp | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/Source/Core/DSPCore/Src/DspIntArithmetic.cpp b/Source/Core/DSPCore/Src/DspIntArithmetic.cpp index ecd220d7a3..dc02d5af59 100644 --- a/Source/Core/DSPCore/Src/DspIntArithmetic.cpp +++ b/Source/Core/DSPCore/Src/DspIntArithmetic.cpp @@ -176,6 +176,7 @@ void orr(const UDSPInstruction& opc) Update_SR_Register64(acc); } + /* // ANDC $acD.m, $ac(1-D).m // 0011 110d xxxx xxxx // Logic AND middle part of accumulator $acD.m with middle part of @@ -207,7 +208,7 @@ void orc(const UDSPInstruction& opc) Update_SR_Register64(dsp_get_long_acc(D)); } - +*/ void orf(const UDSPInstruction& opc) { ERROR_LOG(DSPLLE, "orf not implemented"); @@ -659,7 +660,7 @@ void asr(const UDSPInstruction& opc) // (if value negative, becomes left shift). void lsrn(const UDSPInstruction& opc) { - s16 shift = (s16)g_dsp.r[DSP_REG_ACM1]; + s16 shift = dsp_get_acc_m(1); u64 acc = dsp_get_long_acc(0); // Lop off the extraneous sign extension our 64-bit fake accum causes acc &= 0x000000FFFFFFFFFFULL; @@ -679,7 +680,7 @@ void lsrn(const UDSPInstruction& opc) // (if value negative, becomes left shift). void asrn(const UDSPInstruction& opc) { - s16 shift = (s16)g_dsp.r[DSP_REG_ACM1]; + s16 shift = dsp_get_acc_m(1); s64 acc = dsp_get_long_acc(0); if (shift > 0) { acc >>= shift; @@ -690,6 +691,24 @@ void asrn(const UDSPInstruction& opc) Update_SR_Register64(acc); } +// LSRNR $acR +// 0011 110d 1100 0000 +// Logically shifts right accumulator $ACC0 by signed 16-bit value $AC0.M +// Not described by Duddie's doc - at least not as a separate instruction. +void lsrnr(const UDSPInstruction& opc) +{ + u8 sreg = 1;//Check if it should be (opc.hex >> 8) & 0x1; + s16 shift = dsp_get_acc_m(0); + u64 acc = dsp_get_long_acc(sreg); + acc &= 0x000000FFFFFFFFFFULL; + if (shift > 0) { + acc <<= shift; + } else if (shift < 0) { + acc >>= -shift; + } + dsp_set_long_acc(sreg, acc); + Update_SR_Register64(acc); +} // CMPAR $acS axR.h // 1100 0001 xxxx xxxx @@ -709,6 +728,7 @@ void cmpar(const UDSPInstruction& opc) Update_SR_Register64(sr - rr); } + // CMP // 1000 0010 xxxx xxxx // Compares accumulator $ac0 with accumulator $ac1. |