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authorRobert Ellison <[email protected]>2008-11-11 13:57:10 -0700
committerRobert Ellison <[email protected]>2008-11-11 13:57:10 -0700
commit90027f85786406133a5180998a75fb612b6a221e (patch)
tree595a268f7be19e2e763855b22a66efb0566123d2 /src/gallium/auxiliary
parent2b66417402bc595be301ab9ed7b9ea2a5f79e180 (diff)
CELL: two-sided stencil fixes
With these changes, the tests/stencil_twoside test now works. - Eliminate blending from the stencil_twoside test, as it produces an unneeded dependency on having blending working - The spe_splat() function will now work if the register being splatted and the destination register are the same - Separate fragment code generated for front-facing and back-facing fragments. Often these are the same; if two-sided stenciling is on, they can be different. This is easier and faster than generating code that does both tests and merges the results. - Fixed a cut/paste bug where if the back Z-pass stencil operation were different from all the other operations, the back Z-fail results were incorrect.
Diffstat (limited to 'src/gallium/auxiliary')
-rw-r--r--src/gallium/auxiliary/rtasm/rtasm_ppc_spe.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.c b/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.c
index f8568f690b7..1bd9f1c8dd0 100644
--- a/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.c
+++ b/src/gallium/auxiliary/rtasm/rtasm_ppc_spe.c
@@ -958,9 +958,12 @@ spe_compare_greater_uint(struct spe_function *p, unsigned rT, unsigned rA, unsig
void
spe_splat(struct spe_function *p, unsigned rT, unsigned rA)
{
+ /* Use a temporary, just in case rT == rA */
+ unsigned int tmp_reg = spe_allocate_available_register(p);
/* Duplicate bytes 0, 1, 2, and 3 across the whole register */
- spe_ila(p, rT, 0x00010203);
- spe_shufb(p, rT, rA, rA, rT);
+ spe_ila(p, tmp_reg, 0x00010203);
+ spe_shufb(p, rT, rA, rA, tmp_reg);
+ spe_release_register(p, tmp_reg);
}