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Optimise CompilePolyHeader

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This commit is contained in:
Luke Benstead 2021-04-18 21:50:41 +01:00
parent ce9f3677f6
commit 778e9c4e64
1 changed files with 18 additions and 67 deletions
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85
GL/platform.h
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@ -354,9 +354,23 @@ void SceneFinish();
#define GPU_TA_PM3_TXRFMT_SHIFT 0
#define GPU_TA_PM3_TXRFMT_MASK 0xffffffff
static inline int DimensionFlag(const int w) {
switch(w) {
case 16: return 1;
case 32: return 2;
case 64: return 3;
case 128: return 4;
case 256: return 5;
case 512: return 6;
case 1024: return 7;
case 8:
default:
return 0;
}
}
/* Compile a polygon context into a polygon header */
static inline void CompilePolyHeader(PolyHeader *dst, const PolyContext *src) {
int u, v;
uint32_t txr_base;
/* Basically we just take each parameter, clip it, shift it
@ -365,8 +379,7 @@ static inline void CompilePolyHeader(PolyHeader *dst, const PolyContext *src) {
/* The base values for CMD */
dst->cmd = GPU_CMD_POLYHDR;
if(src->txr.enable == GPU_TEXTURE_ENABLE)
dst->cmd |= 8;
dst->cmd |= src->txr.enable << 3;
/* Or in the list type, shading type, color and UV formats */
dst->cmd |= (src->list_type << GPU_TA_CMD_TYPE_SHIFT) & GPU_TA_CMD_TYPE_MASK;
@ -404,70 +417,8 @@ static inline void CompilePolyHeader(PolyHeader *dst, const PolyContext *src) {
dst->mode2 |= (src->txr.mipmap_bias << GPU_TA_PM2_MIPBIAS_SHIFT) & GPU_TA_PM2_MIPBIAS_MASK;
dst->mode2 |= (src->txr.env << GPU_TA_PM2_TXRENV_SHIFT) & GPU_TA_PM2_TXRENV_MASK;
switch(src->txr.width) {
case 8:
u = 0;
break;
case 16:
u = 1;
break;
case 32:
u = 2;
break;
case 64:
u = 3;
break;
case 128:
u = 4;
break;
case 256:
u = 5;
break;
case 512:
u = 6;
break;
case 1024:
u = 7;
break;
default:
assert(0 && "Invalid texture U size");
u = 0;
break;
}
switch(src->txr.height) {
case 8:
v = 0;
break;
case 16:
v = 1;
break;
case 32:
v = 2;
break;
case 64:
v = 3;
break;
case 128:
v = 4;
break;
case 256:
v = 5;
break;
case 512:
v = 6;
break;
case 1024:
v = 7;
break;
default:
assert(0 && "Invalid texture V size");
v = 0;
break;
}
dst->mode2 |= (u << GPU_TA_PM2_USIZE_SHIFT) & GPU_TA_PM2_USIZE_MASK;
dst->mode2 |= (v << GPU_TA_PM2_VSIZE_SHIFT) & GPU_TA_PM2_VSIZE_MASK;
dst->mode2 |= (DimensionFlag(src->txr.width) << GPU_TA_PM2_USIZE_SHIFT) & GPU_TA_PM2_USIZE_MASK;
dst->mode2 |= (DimensionFlag(src->txr.height) << GPU_TA_PM2_VSIZE_SHIFT) & GPU_TA_PM2_VSIZE_MASK;
/* Polygon mode 3 */
dst->mode3 = (src->txr.mipmap << GPU_TA_PM3_MIPMAP_SHIFT) & GPU_TA_PM3_MIPMAP_MASK;