history-museum/winamp
1
0
Fork 0
mirror of https://github.com/WinampDesktop/winamp.git synced 2025-06-19 08:35:45 -04:00
Code Issues Actions Packages Projects Releases Wiki Activity

Rename to DuckStation

Browse Source
This commit is contained in:
Connor McLaughlin
2019-10-04 13:54:09 +10:00
parent 92ec5a0a14
commit bddbab9d60
61 changed files with 43 additions and 54 deletions
Download Patch File Download Diff File Expand all files Collapse all files

117
src/core/gte.inl Normal file
View File

@ -0,0 +1,117 @@
#include "gte.h"
template<u32 index>
void GTE::Core::CheckMACOverflow(s64 value)
{
constexpr s64 MIN_VALUE = (index == 0) ? MAC0_MIN_VALUE : MAC123_MIN_VALUE;
constexpr s64 MAX_VALUE = (index == 0) ? MAC0_MAX_VALUE : MAC123_MAX_VALUE;
if (value < MIN_VALUE)
{
if constexpr (index == 0)
m_regs.FLAG.mac0_underflow = true;
else if constexpr (index == 1)
m_regs.FLAG.mac1_underflow = true;
else if constexpr (index == 2)
m_regs.FLAG.mac2_underflow = true;
else if constexpr (index == 3)
m_regs.FLAG.mac3_underflow = true;
}
else if (value > MAX_VALUE)
{
if constexpr (index == 0)
m_regs.FLAG.mac0_overflow = true;
else if constexpr (index == 1)
m_regs.FLAG.mac1_overflow = true;
else if constexpr (index == 2)
m_regs.FLAG.mac2_overflow = true;
else if constexpr (index == 3)
m_regs.FLAG.mac3_overflow = true;
}
}
template<u32 index>
s64 GTE::Core::SignExtendMACResult(s64 value)
{
CheckMACOverflow<index>(value);
return SignExtendN < index == 0 ? 31 : 44 > (value);
}
template<u32 index>
void GTE::Core::TruncateAndSetMAC(s64 value, u8 shift)
{
CheckMACOverflow<index>(value);
// shift should be done before storing to avoid losing precision
value >>= shift;
m_regs.dr32[24 + index] = Truncate32(static_cast<u64>(value));
}
template<u32 index>
void GTE::Core::TruncateAndSetIR(s32 value, bool lm)
{
constexpr s32 MIN_VALUE = (index == 0) ? IR0_MIN_VALUE : IR123_MIN_VALUE;
constexpr s32 MAX_VALUE = (index == 0) ? IR0_MAX_VALUE : IR123_MAX_VALUE;
const s32 actual_min_value = lm ? 0 : MIN_VALUE;
if (value < actual_min_value)
{
value = actual_min_value;
if constexpr (index == 0)
m_regs.FLAG.ir0_saturated = true;
else if constexpr (index == 1)
m_regs.FLAG.ir1_saturated = true;
else if constexpr (index == 2)
m_regs.FLAG.ir2_saturated = true;
else if constexpr (index == 3)
m_regs.FLAG.ir3_saturated = true;
}
else if (value > MAX_VALUE)
{
value = MAX_VALUE;
if constexpr (index == 0)
m_regs.FLAG.ir0_saturated = true;
else if constexpr (index == 1)
m_regs.FLAG.ir1_saturated = true;
else if constexpr (index == 2)
m_regs.FLAG.ir2_saturated = true;
else if constexpr (index == 3)
m_regs.FLAG.ir3_saturated = true;
}
// store sign-extended 16-bit value as 32-bit
m_regs.dr32[8 + index] = value;
}
template<u32 index>
void GTE::Core::TruncateAndSetMACAndIR(s64 value, u8 shift, bool lm)
{
CheckMACOverflow<index>(value);
// shift should be done before storing to avoid losing precision
value >>= shift;
// set MAC
const s32 value32 = static_cast<s32>(value);
m_regs.dr32[24 + index] = value32;
// set IR
TruncateAndSetIR<index>(value32, lm);
}
template<u32 index>
u8 GTE::Core::TruncateRGB(s32 value)
{
if (value < 0 || value > 0xFF)
{
if constexpr (index == 0)
m_regs.FLAG.color_r_saturated = true;
else if constexpr (index == 1)
m_regs.FLAG.color_g_saturated = true;
else
m_regs.FLAG.color_b_saturated = true;
value = (value < 0) ? 0 : 0xFF;
}
return static_cast<u8>(value);
}