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GTE: Implement DPCL instruction

This commit is contained in:
Connor McLaughlin 2019-09-27 23:44:33 +10:00
parent a479d820d4
commit da0ad66080
2 changed files with 43 additions and 5 deletions
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47
src/pse/gte.cpp
View File

@ -294,6 +294,10 @@ void Core::ExecuteInstruction(Instruction inst)
Execute_SQR(inst);
break;
case 0x29:
Execute_DPCL(inst);
break;
case 0x2A:
Execute_DPCT(inst);
break;
@ -770,8 +774,6 @@ void Core::DPCS(const u8 color[3], bool sf, bool lm)
TruncateAndSetIR<1>(m_regs.MAC1, lm);
TruncateAndSetIR<2>(m_regs.MAC2, lm);
TruncateAndSetIR<3>(m_regs.MAC3, lm);
m_regs.FLAG.UpdateError();
}
void Core::Execute_DPCS(Instruction inst)
@ -790,9 +792,44 @@ void Core::Execute_DPCT(Instruction inst)
const bool sf = inst.sf;
const bool lm = inst.lm;
DPCS(m_regs.RGB0, sf, lm);
DPCS(m_regs.RGB0, sf, lm);
DPCS(m_regs.RGB0, sf, lm);
for (u32 i = 0; i < 3; i++)
DPCS(m_regs.RGB0, sf, lm);
m_regs.FLAG.UpdateError();
}
void Core::Execute_DPCL(Instruction inst)
{
m_regs.FLAG.Clear();
const u8 shift = inst.GetShift();
const bool lm = inst.lm;
// In: [IR1,IR2,IR3]=Vector, FC=Far Color, IR0=Interpolation value, CODE=MSB of RGBC
// [MAC1,MAC2,MAC3] = [R,G,B] SHL 16 ;<--- for DPCS/DPCT
// [MAC1,MAC2,MAC3] = [R*IR1,G*IR2,B*IR3] SHL 4 ;<--- for DCPL only
TruncateAndSetMAC<1>(((s64(ZeroExtend64(m_regs.RGBC[0])) + s64(m_regs.IR0)) << 4), 0);
TruncateAndSetMAC<2>(((s64(ZeroExtend64(m_regs.RGBC[1])) + s64(m_regs.IR0)) << 4), 0);
TruncateAndSetMAC<3>(((s64(ZeroExtend64(m_regs.RGBC[2])) + s64(m_regs.IR0)) << 4), 0);
// [MAC1,MAC2,MAC3] = MAC+(FC-MAC)*IR0
// [IR1,IR2,IR3] = (([RFC,GFC,BFC] SHL 12) - [MAC1,MAC2,MAC3]) SAR (sf*12)
TruncateAndSetIR<1>(s32((s64(m_regs.FC[0]) << 12) - s64(m_regs.MAC1)) >> shift, false);
TruncateAndSetIR<2>(s32((s64(m_regs.FC[1]) << 12) - s64(m_regs.MAC2)) >> shift, false);
TruncateAndSetIR<3>(s32((s64(m_regs.FC[2]) << 12) - s64(m_regs.MAC3)) >> shift, false);
// [MAC1,MAC2,MAC3] = (([IR1,IR2,IR3] * IR0) + [MAC1,MAC2,MAC3])
// [MAC1,MAC2,MAC3] = [MAC1,MAC2,MAC3] SAR (sf*12)
TruncateAndSetMAC<1>(s64(s32(m_regs.IR1) * s32(m_regs.IR0)) + s64(m_regs.MAC1), shift);
TruncateAndSetMAC<2>(s64(s32(m_regs.IR2) * s32(m_regs.IR0)) + s64(m_regs.MAC2), shift);
TruncateAndSetMAC<3>(s64(s32(m_regs.IR3) * s32(m_regs.IR0)) + s64(m_regs.MAC3), shift);
// Color FIFO = [MAC1/16,MAC2/16,MAC3/16,CODE], [IR1,IR2,IR3] = [MAC1,MAC2,MAC3]
PushRGB(TruncateRGB<0>(m_regs.MAC1 / 16), TruncateRGB<1>(m_regs.MAC2 / 16), TruncateRGB<2>(m_regs.MAC3 / 16),
m_regs.RGBC[3]);
TruncateAndSetIR<1>(m_regs.MAC1, lm);
TruncateAndSetIR<2>(m_regs.MAC2, lm);
TruncateAndSetIR<3>(m_regs.MAC3, lm);
m_regs.FLAG.UpdateError();
}

1
src/pse/gte.h
View File

@ -77,6 +77,7 @@ private:
void Execute_MVMVA(Instruction inst);
void Execute_DPCS(Instruction inst);
void Execute_DPCT(Instruction inst);
void Execute_DPCL(Instruction inst);
Regs m_regs = {};
};