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CPU/PGXP: Handle SXYP mirror reads

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Fixes PGXP on some parts of geometry in Legend of Legaia.

Also fixes broken PGXP in Boxing and Touge Max G.
This commit is contained in:
Stenzek
2025-10-09 21:45:58 +10:00
parent cd37cd741c
commit 05a58285aa
1 changed files with 9 additions and 8 deletions
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17
src/core/cpu_pgxp.cpp
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@@ -82,7 +82,7 @@ static void SetRtValue(Instruction instr, const PGXPValue& val, u32 rtVal);
static PGXPValue& GetSXY0();
static PGXPValue& GetSXY1();
static PGXPValue& GetSXY2();
static PGXPValue& PushSXY();
static void PushScreenXYFIFO();
static PGXPValue* GetPtr(u32 addr);
static const PGXPValue& ValidateAndLoadMem(u32 addr, u32 value);
@@ -292,11 +292,11 @@ ALWAYS_INLINE CPU::PGXPValue& CPU::PGXP::GetSXY2()
return g_state.pgxp_gte[14];
}
ALWAYS_INLINE CPU::PGXPValue& CPU::PGXP::PushSXY()
ALWAYS_INLINE void CPU::PGXP::PushScreenXYFIFO()
{
g_state.pgxp_gte[12] = g_state.pgxp_gte[13];
g_state.pgxp_gte[13] = g_state.pgxp_gte[14];
return g_state.pgxp_gte[14];
g_state.pgxp_gte[12] = g_state.pgxp_gte[13]; // SXY0 = SXY1
g_state.pgxp_gte[13] = g_state.pgxp_gte[14]; // SXY1 = SXY2
g_state.pgxp_gte[14] = g_state.pgxp_gte[15]; // SXY2 = SXYP
}
ALWAYS_INLINE_RELEASE CPU::PGXPValue* CPU::PGXP::GetPtr(u32 addr)
@@ -498,12 +498,13 @@ void CPU::PGXP::LogValueStr(SmallStringBase& str, const char* name, u32 rval, co
void CPU::PGXP::GTE_RTPS(float x, float y, float z, u32 value)
{
PGXPValue& pvalue = PushSXY();
PGXPValue& pvalue = g_state.pgxp_gte[15];
pvalue.x = x;
pvalue.y = y;
pvalue.z = z;
pvalue.value = value;
pvalue.flags = VALID_ALL;
PushScreenXYFIFO();
if (g_settings.gpu_pgxp_vertex_cache)
CacheVertex(value, pvalue);
@@ -545,8 +546,8 @@ ALWAYS_INLINE_RELEASE void CPU::PGXP::CPU_MTC2(u32 reg, const PGXPValue& value,
case 15:
{
// push FIFO
PGXPValue& SXY2 = PushSXY();
SXY2 = value;
g_state.pgxp_gte[15] = value;
PushScreenXYFIFO();
return;
}