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GTE: Fix NCDT

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This commit is contained in:
Connor McLaughlin 2019-10-12 17:21:08 +10:00
parent 3f1fea0e97
commit 9bdff9e1dc
3 changed files with 14 additions and 17 deletions
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22
src/core/gte.cpp
View file

@ -309,7 +309,7 @@ void Core::ExecuteInstruction(Instruction inst)
break;
case 0x16:
Execute_NCCT(inst);
Execute_NCDT(inst);
break;
case 0x1B:
@ -435,19 +435,17 @@ void Core::PushSZ(s32 value)
m_regs.dr32[19] = static_cast<u32>(value); // SZ3 <- value
}
void Core::PushRGB(u8 r, u8 g, u8 b, u8 c)
{
m_regs.dr32[20] = m_regs.dr32[21]; // RGB0 <- RGB1
m_regs.dr32[21] = m_regs.dr32[22]; // RGB1 <- RGB2
m_regs.dr32[22] =
ZeroExtend32(r) | (ZeroExtend32(g) << 8) | (ZeroExtend32(b) << 16) | (ZeroExtend32(c) << 24); // RGB2 <- Value
}
void Core::PushRGBFromMAC()
{
// Note: SHR 4 used instead of /16 as the results are different.
PushRGB(TruncateRGB<0>(m_regs.MAC1 >> 4), TruncateRGB<1>(m_regs.MAC2 >> 4), TruncateRGB<2>(m_regs.MAC3 >> 4),
m_regs.RGBC[3]);
const u32 r = TruncateRGB<0>(static_cast<u32>(m_regs.MAC1 >> 4));
const u32 g = TruncateRGB<1>(static_cast<u32>(m_regs.MAC2 >> 4));
const u32 b = TruncateRGB<2>(static_cast<u32>(m_regs.MAC3 >> 4));
const u32 c = ZeroExtend32(m_regs.RGBC[3]);
m_regs.dr32[20] = m_regs.dr32[21]; // RGB0 <- RGB1
m_regs.dr32[21] = m_regs.dr32[22]; // RGB1 <- RGB2
m_regs.dr32[22] = r | (g << 8) | (b << 16) | (c << 24); // RGB2 <- Value
}
u32 Core::UNRDivide(u32 lhs, u32 rhs)
@ -662,7 +660,7 @@ void Core::RTPS(const s16 V[3], u8 shift, bool lm, bool last)
// The command does saturate IR1,IR2,IR3 to -8000h..+7FFFh (regardless of lm bit). When using RTP with sf=0, then the
// IR3 saturation flag (FLAG.22) gets set <only> if "MAC3 SAR 12" exceeds -8000h..+7FFFh (although IR3 is saturated
// when "MAC3" exceeds -8000h..+7FFFh).
TruncateAndSetIR<3>(z >> 12, false);
TruncateAndSetIR<3>(s32(z >> 12), false);
m_regs.dr32[11] = std::clamp(m_regs.MAC3, lm ? 0 : IR123_MIN_VALUE, IR123_MAX_VALUE);
#undef dot3

3
src/core/gte.h
View file

@ -53,12 +53,11 @@ private:
void TruncateAndSetIR(s32 value, bool lm);
template<u32 index>
u8 TruncateRGB(s32 value);
u32 TruncateRGB(s32 value);
void SetOTZ(s32 value);
void PushSXY(s32 x, s32 y);
void PushSZ(s32 value);
void PushRGB(u8 r, u8 g, u8 b, u8 c);
void PushRGBFromMAC();
// Divide using Unsigned Newton-Raphson algorithm.

6
src/core/gte.inl
View file

@ -99,7 +99,7 @@ void GTE::Core::TruncateAndSetMACAndIR(s64 value, u8 shift, bool lm)
}
template<u32 index>
u8 GTE::Core::TruncateRGB(s32 value)
u32 GTE::Core::TruncateRGB(s32 value)
{
if (value < 0 || value > 0xFF)
{
@ -110,8 +110,8 @@ u8 GTE::Core::TruncateRGB(s32 value)
else
m_regs.FLAG.color_b_saturated = true;
value = (value < 0) ? 0 : 0xFF;
return (value < 0) ? 0 : 0xFF;
}
return static_cast<u8>(value);
return static_cast<u32>(value);
}