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Try to optimise the quad generation

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This commit is contained in:
Luke Benstead 2019-03-25 10:33:05 +00:00
parent 671881eafd
commit 0e71588e6c
1 changed files with 23 additions and 10 deletions
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33
GL/draw.c
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@ -536,13 +536,27 @@ static inline void transformNormalToEyeSpace(GLfloat* normal) {
mat_trans_normal3(normal[0], normal[1], normal[2]);
}
/* FIXME: SH4 has a swap.w instruction, we should leverage it here! */
#define _XOR_SWAP32(x, y) \
*((uint32_t*) &x) = *((uint32_t*) &x) ^ *((uint32_t*) &y); \
*((uint32_t*) &y) = *((uint32_t*) &x) ^ *((uint32_t*) &y); \
*((uint32_t*) &x) = *((uint32_t*) &x) ^ *((uint32_t*) &y);
#define swapVertex(a, b) \
do { \
Vertex temp = *a; \
*a = *b; \
*b = temp; \
_XOR_SWAP32(a->flags, b->flags); \
_XOR_SWAP32(a->xyz[0], b->xyz[0]); \
_XOR_SWAP32(a->xyz[1], b->xyz[1]); \
_XOR_SWAP32(a->xyz[2], b->xyz[2]); \
_XOR_SWAP32(a->uv[0], b->uv[0]); \
_XOR_SWAP32(a->uv[1], b->uv[1]); \
_XOR_SWAP32(a->bgra, b->bgra); \
_XOR_SWAP32(a->w, b->w); \
} while(0)
PVRHeader* _glSubmissionTargetHeader(SubmissionTarget* target) {
return aligned_vector_at(&target->output->vector, target->header_offset);
}
@ -565,16 +579,16 @@ static inline void genTriangles(Vertex* output, GLuint count) {
}
static inline void genQuads(Vertex* output, GLuint count) {
Vertex* previous;
Vertex* this = output + 3;
Vertex* this = output + 2;
Vertex* next = this + 1;
const Vertex* end = output + count;
while(this < end) {
previous = this - 1;
swapVertex(previous, this);
this->flags = PVR_CMD_VERTEX_EOL;
swapVertex(this, next);
next->flags = PVR_CMD_VERTEX_EOL;
this += 4;
next += 4;
}
}
@ -589,7 +603,6 @@ static void genTriangleFan(Vertex* output, GLuint count) {
static Vertex buffer[MAX_POLYGON_SIZE];
if(count <= 3){
swapVertex(&output[1], &output[2]);
output[2].flags = PVR_CMD_VERTEX_EOL;
return;
}