diff options
author | Robert Ellison <papillo@tungstengraphics.com> | 2008-11-11 13:57:10 -0700 |
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committer | Robert Ellison <papillo@tungstengraphics.com> | 2008-11-11 13:57:10 -0700 |
commit | 90027f85786406133a5180998a75fb612b6a221e (patch) | |
tree | 595a268f7be19e2e763855b22a66efb0566123d2 /src/gallium/auxiliary/rtasm | |
parent | 2b66417402bc595be301ab9ed7b9ea2a5f79e180 (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/rtasm')
-rw-r--r-- | src/gallium/auxiliary/rtasm/rtasm_ppc_spe.c | 7 |
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 f8568f690b..1bd9f1c8dd 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); } |