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Further optimisations

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This commit is contained in:
Luke Benstead 2023-04-23 20:16:15 +01:00
parent 2ec7055547
commit 0923b5c601
2 changed files with 33 additions and 28 deletions
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49
GL/platforms/sh4.c
View File

@ -154,9 +154,8 @@ void SceneListSubmit(void* src, int n) {
/* The most vertices ever in the queue is 5 (as some clipping operations
* produce and additional couple of vertice, but we add one more so the ring buffer doesn't
* trip over itself (e.g. if tail == head we can guarantee it's empty, not full) */
Vertex __attribute__((aligned(32))) queue[4];
const int queue_capacity = sizeof(queue) / sizeof(Vertex);
const static uint8_t queue_capacity = 4;
Vertex __attribute__((aligned(32))) queue[queue_capacity];
Vertex* vertex = (Vertex*) src;
#if CLIP_DEBUG
@ -195,28 +194,28 @@ void SceneListSubmit(void* src, int n) {
fprintf(stderr, "%d\n", visible_mask);
#endif
Vertex __attribute__((aligned(32))) a, b; // Scratch vertices
switch(visible_mask) {
switch(visible_mask | (last_vertex << 3)) {
case 0:
break;
case 7:
/* All visible, push the first vertex and move on */
case 15: /* All visible, but final vertex in strip */
const int8_t v1 = (queue_head + 1) % queue_capacity;
const int8_t v2 = (queue_head + 2) % queue_capacity;
_glPerspectiveDivideVertex(&queue[queue_head], h);
_glSubmitHeaderOrVertex(d, &queue[queue_head]);
if(last_vertex) {
/* If this was the last vertex in the strip, we need to flush the queue and then
restart it again */
int v1 = (queue_head + 1) % queue_capacity;
int v2 = (queue_head + 2) % queue_capacity;
_glPerspectiveDivideVertex(&queue[v1], h);
_glSubmitHeaderOrVertex(d, &queue[v1]);
_glPerspectiveDivideVertex(&queue[v2], h);
_glSubmitHeaderOrVertex(d, &queue[v2]);
}
break;
case 7:
/* All visible, push the first vertex and move on */
_glPerspectiveDivideVertex(&queue[queue_head], h);
_glSubmitHeaderOrVertex(d, &queue[queue_head]);
break;
case 9:
case 1:
/* First vertex was visible */
{
@ -235,37 +234,40 @@ void SceneListSubmit(void* src, int n) {
b.flags = v2->flags;
_glPerspectiveDivideVertex(v0, h);
_glPerspectiveDivideVertex(&a, h);
_glPerspectiveDivideVertex(&b, h);
_glSubmitHeaderOrVertex(d, v0);
_glPerspectiveDivideVertex(&a, h);
_glSubmitHeaderOrVertex(d, &a);
_glPerspectiveDivideVertex(&b, h);
_glSubmitHeaderOrVertex(d, &b);
_glSubmitHeaderOrVertex(d, &b);
}
break;
case 10:
case 2:
/* Second vertex was visible. In self case we need to create a triangle and produce
two new vertices: 1-2, and 2-3. */
{
Vertex* v0 = &queue[queue_head];
const Vertex* v1 = &queue[(queue_head + 1) % queue_capacity];
Vertex __attribute__((aligned(32))) v1 = queue[(queue_head + 1) % queue_capacity];
const Vertex* v2 = &queue[(queue_head + 2) % queue_capacity];
_glClipEdge(v0, v1, &a);
_glClipEdge(v1, v2, &b);
_glClipEdge(v0, &v1, &a);
_glClipEdge(&v1, v2, &b);
a.flags = GPU_CMD_VERTEX;
b.flags = v2->flags;
_glPerspectiveDivideVertex(v0, h);
_glPerspectiveDivideVertex(&v1, h);
_glPerspectiveDivideVertex(&a, h);
_glPerspectiveDivideVertex(&b, h);
_glSubmitHeaderOrVertex(d, &a);
_glSubmitHeaderOrVertex(d, v0);
_glSubmitHeaderOrVertex(d, &v1);
_glSubmitHeaderOrVertex(d, &b);
}
break;
case 11:
case 3: /* First and second vertex were visible */
{
Vertex* v0 = &queue[queue_head];
@ -290,6 +292,7 @@ void SceneListSubmit(void* src, int n) {
_glSubmitHeaderOrVertex(d, &a);
}
break;
case 12:
case 4:
/* Third vertex was visible. */
{
@ -312,6 +315,7 @@ void SceneListSubmit(void* src, int n) {
_glSubmitHeaderOrVertex(d, &v2);
}
break;
case 13:
case 5: /* First and third vertex were visible */
{
Vertex* v0 = &queue[queue_head];
@ -338,6 +342,7 @@ void SceneListSubmit(void* src, int n) {
_glSubmitHeaderOrVertex(d, &v2);
}
break;
case 14:
case 6: /* Second and third vertex were visible */
{
Vertex* v0 = &queue[queue_head];

4
GL/private.h
View File

@ -241,8 +241,8 @@ GL_FORCE_INLINE void memcpy_vertex(Vertex *dest, const Vertex *src) {
asm volatile (
"fschg\n\t"
"clrs\n"
".align 2\n"
"clrs\n\t"
".align 2\n\t"
"fmov.d @%[in]+, %[scratch]\n\t"
"fmov.d %[scratch], @%[out]\n\t"
"fmov.d @%[in]+, %[scratch]\n\t"