Xargon/Duckstation
1
0
Fork 0
mirror of https://github.com/RetroDECK/Duckstation.git synced 2024-11-25 15:15:40 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

GTE: Fix NCDS

Browse source
This commit is contained in:
Connor McLaughlin 2019-10-04 16:14:26 +10:00
parent 4a4af8d0ca
commit 6a7ed5d8bc
2 changed files with 16 additions and 26 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

40
src/core/gte.cpp
View file

@ -640,46 +640,32 @@ void Core::Execute_NCCT(Instruction inst)
m_regs.FLAG.UpdateError();
}
void Core::NCDS(const s16 V[3], bool sf, bool lm)
void Core::NCDS(const s16 V[3], u8 shift, bool lm)
{
const u8 shift = sf ? 12 : 0;
// [IR1,IR2,IR3] = [MAC1,MAC2,MAC3] = (LLM*V0) SAR (sf*12)
MulMatVec(m_regs.LLM, V[0], V[1], V[2], shift, lm);
// [IR1,IR2,IR3] = [MAC1,MAC2,MAC3] = (BK*1000h + LCM*IR) SAR (sf*12)
MulMatVec(m_regs.LCM, m_regs.BK, m_regs.IR1, m_regs.IR2, m_regs.IR3, shift, lm);
// No need to assign these to MAC[1-3], as it'll never overflow.
// [MAC1,MAC2,MAC3] = [R*IR1,G*IR2,B*IR3] SHL 4 ;<--- for NCDx/NCCx
TruncateAndSetMAC<1>((s64(ZeroExtend64(m_regs.RGBC[0])) << 4) * s64(m_regs.MAC1), 0);
TruncateAndSetMAC<2>((s64(ZeroExtend64(m_regs.RGBC[1])) << 4) * s64(m_regs.MAC2), 0);
TruncateAndSetMAC<3>((s64(ZeroExtend64(m_regs.RGBC[2])) << 4) * s64(m_regs.MAC3), 0);
const s32 in_MAC1 = (s32(ZeroExtend32(m_regs.RGBC[0])) * s32(m_regs.IR1)) << 4;
const s32 in_MAC2 = (s32(ZeroExtend32(m_regs.RGBC[1])) * s32(m_regs.IR2)) << 4;
const s32 in_MAC3 = (s32(ZeroExtend32(m_regs.RGBC[2])) * s32(m_regs.IR3)) << 4;
// [MAC1,MAC2,MAC3] = MAC+(FC-MAC)*IR0 ;<--- for NCDx only
// [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) ;<--- for NCDx/NCCx
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(in_MAC1, in_MAC2, in_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_NCDS(Instruction inst)
{
m_regs.FLAG.Clear();
NCDS(m_regs.V0, inst.sf, inst.lm);
NCDS(m_regs.V0, inst.GetShift(), inst.lm);
m_regs.FLAG.UpdateError();
}
@ -688,9 +674,12 @@ void Core::Execute_NCDT(Instruction inst)
{
m_regs.FLAG.Clear();
NCDS(m_regs.V0, inst.sf, inst.lm);
NCDS(m_regs.V1, inst.sf, inst.lm);
NCDS(m_regs.V2, inst.sf, inst.lm);
const u8 shift = inst.GetShift();
const bool lm = inst.lm;
NCDS(m_regs.V0, shift, lm);
NCDS(m_regs.V1, shift, lm);
NCDS(m_regs.V2, shift, lm);
m_regs.FLAG.UpdateError();
}
@ -814,6 +803,7 @@ void Core::Execute_DCPL(Instruction inst)
const bool lm = inst.lm;
// No need to assign these to MAC[1-3], as it'll never overflow.
// [MAC1,MAC2,MAC3] = [R*IR1,G*IR2,B*IR3] SHL 4 ;<--- for DCPL only
const s32 in_MAC1 = (s32(ZeroExtend32(m_regs.RGBC[0])) * s32(m_regs.IR1)) << 4;
const s32 in_MAC2 = (s32(ZeroExtend32(m_regs.RGBC[1])) * s32(m_regs.IR2)) << 4;
const s32 in_MAC3 = (s32(ZeroExtend32(m_regs.RGBC[2])) * s32(m_regs.IR3)) << 4;

2
src/core/gte.h
View file

@ -72,7 +72,7 @@ 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 NCDS(const s16 V[3], u8 shift, bool lm);
void DPCS(const u8 color[3], u8 shift, bool lm);
void Execute_RTPS(Instruction inst);