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GTE: Fix DCPS/DCPT

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This commit is contained in:
Connor McLaughlin 2019-10-04 16:06:45 +10:00
parent 98dc15cd17
commit 4a4af8d0ca
2 changed files with 7 additions and 22 deletions
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27
src/core/gte.cpp
View file

@ -769,10 +769,8 @@ void Core::Execute_MVMVA(Instruction inst)
m_regs.FLAG.UpdateError();
}
void Core::DPCS(const u8 color[3], bool sf, bool lm)
void Core::DPCS(const u8 color[3], u8 shift, bool lm)
{
const u8 shift = sf ? 12 : 0;
// 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
TruncateAndSetMAC<1>((s64(ZeroExtend64(color[0])) << 16), 0);
@ -780,30 +778,17 @@ void Core::DPCS(const u8 color[3], bool sf, bool lm)
TruncateAndSetMAC<3>((s64(ZeroExtend64(color[2])) << 16), 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);
InterpolateColor(m_regs.MAC1, m_regs.MAC2, m_regs.MAC3, shift, lm);
// 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);
PushRGBFromMAC();
}
void Core::Execute_DPCS(Instruction inst)
{
m_regs.FLAG.Clear();
DPCS(m_regs.RGBC, inst.sf, inst.lm);
DPCS(m_regs.RGBC, inst.GetShift(), inst.lm);
m_regs.FLAG.UpdateError();
}
@ -812,11 +797,11 @@ void Core::Execute_DPCT(Instruction inst)
{
m_regs.FLAG.Clear();
const bool sf = inst.sf;
const u8 shift = inst.GetShift();
const bool lm = inst.lm;
for (u32 i = 0; i < 3; i++)
DPCS(m_regs.RGB0, sf, lm);
DPCS(m_regs.RGB0, shift, lm);
m_regs.FLAG.UpdateError();
}

2
src/core/gte.h
View file

@ -73,7 +73,7 @@ private:
void RTPS(const s16 V[3], bool sf, bool lm, bool last);
void NCCS(const s16 V[3], u8 shift, bool lm);
void NCDS(const s16 V[3], bool sf, bool lm);
void DPCS(const u8 color[3], bool sf, bool lm);
void DPCS(const u8 color[3], u8 shift, bool lm);
void Execute_RTPS(Instruction inst);
void Execute_RTPT(Instruction inst);