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(GTE) Rewrite TransformXY

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This commit is contained in:
twinaphex 2016-06-07 08:51:15 +02:00
parent baec1c3303
commit 3f7e1934ac
1 changed files with 12 additions and 15 deletions
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27
mednafen/psx/gte.cpp
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@ -733,14 +733,6 @@ static INLINE int64_t i64_to_i44(unsigned which, int64_t value)
return (((int64_t)((uint64_t)(value) << (64 - 44))) >> (64 - 44));
}
static INLINE int64_t F(int64_t value)
{
if(value < -2147483648LL)
FLAGS |= 1 << 15;
if(value > 2147483647LL)
FLAGS |= 1 << 16;
return(value);
}
static INLINE int16_t i32_to_i16_saturate(unsigned int which, int32_t value, int lm)
{
@ -1078,20 +1070,25 @@ static INLINE void check_mac_overflow(int64_t value)
static INLINE void TransformXY(int64_t h_div_sz, float precise_h_div_sz, int16 z)
{
float fofx = ((float)OFX / (float)(1 << 16));
float fofy = ((float)OFY / (float)(1 << 16));
float fofx = ((float)OFX / (float)(1 << 16));
float fofy = ((float)OFY / (float)(1 << 16));
int64_t screen_x = (int64_t)OFX + IR1 * h_div_sz * ((widescreen_hack) ? 0.75 : 1.00);
int64_t screen_y = (int64_t)OFY + IR2 * h_div_sz;
MAC[0] = F((int64_t)OFX + IR1 * h_div_sz * ((widescreen_hack) ? 0.75 : 1.00)) >> 16;
XY_FIFO[3].X = i32_to_i11_saturate(0, MAC[0]);
check_mac_overflow(screen_x);
check_mac_overflow(screen_y);
MAC[0] = F((int64_t)OFY + IR2 * h_div_sz) >> 16;
XY_FIFO[3].Y = i32_to_i11_saturate(1, MAC[0]);
screen_x = (int32_t)(screen_x >> 16);
screen_y = (int32_t)(screen_y >> 16);
/* Push onto the XY FIFO */
XY_FIFO[3].X = i32_to_i11_saturate(0, screen_x);
XY_FIFO[3].Y = i32_to_i11_saturate(1, screen_y);
/* Increased precision calculation (sub-pixel precision) */
float precise_x = fofx + ((float)IR1 * precise_h_div_sz);
float precise_y = fofy + ((float)IR2 * precise_h_div_sz);
/* Push onto the XY FIFO */
GPU->AddSubpixelVertex(XY_FIFO[3].X, XY_FIFO[3].Y,
precise_x, precise_y, z);