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cell: SIMDize some subtractions

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Put edge.{dx,dy} into a union with a vector and perform subtractions in
setup_sort_vertices() on vectors.

Reduces spu_tri.o by ~300 bytes.
This commit is contained in:
Jonathan Adamczewski
2009-01-05 07:49:48 -07:00
committed by Brian Paul
parent 5256f94b1a
commit 90167d0ee9
1 changed files with 10 additions and 8 deletions
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src/gallium/drivers/cell/spu/spu_tri.c
+10 -8
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@@ -77,8 +77,13 @@ struct vertex_header {
* Triangle edge info
*/
struct edge {
float dx; /**< X(v1) - X(v0), used only during setup */
float dy; /**< Y(v1) - Y(v0), used only during setup */
union {
struct {
float dx; /**< X(v1) - X(v0), used only during setup */
float dy; /**< Y(v1) - Y(v0), used only during setup */
};
vec_float4 ds; /**< vector accessor for dx and dy */
};
float dxdy; /**< dx/dy */
float sx, sy; /**< first sample point coord */
int lines; /**< number of lines on this edge */
@@ -517,12 +522,9 @@ setup_sort_vertices(const struct vertex_header *v0,
spu_extract(setup.vmax->data[0], 0) > setup.cliprect_maxx)
return FALSE;
setup.ebot.dx = spu_extract(setup.vmid->data[0], 0) - spu_extract(setup.vmin->data[0], 0);
setup.ebot.dy = spu_extract(setup.vmid->data[0], 1) - spu_extract(setup.vmin->data[0], 1);
setup.emaj.dx = spu_extract(setup.vmax->data[0], 0) - spu_extract(setup.vmin->data[0], 0);
setup.emaj.dy = spu_extract(setup.vmax->data[0], 1) - spu_extract(setup.vmin->data[0], 1);
setup.etop.dx = spu_extract(setup.vmax->data[0], 0) - spu_extract(setup.vmid->data[0], 0);
setup.etop.dy = spu_extract(setup.vmax->data[0], 1) - spu_extract(setup.vmid->data[0], 1);
setup.ebot.ds = spu_sub(setup.vmid->data[0], setup.vmin->data[0]);
setup.emaj.ds = spu_sub(setup.vmax->data[0], setup.vmin->data[0]);
setup.etop.ds = spu_sub(setup.vmax->data[0], setup.vmid->data[0]);
/*
* Compute triangle's area. Use 1/area to compute partial