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| author | José Fonseca <jose.r.fonseca@gmail.com> | 2012-05-18 01:03:13 +0100 |
|---|---|---|
| committer | José Fonseca <jose.r.fonseca@gmail.com> | 2012-05-18 01:03:13 +0100 |
| commit | 3f7a5ffac7e78bca47fa58849f5666fb334b3ab1 (patch) | |
| tree | df7663c4867705eeeaffb1ee3a813e16b2a9ac54 | |
| parent | 00eb74b275e21d567a0ab8a6731181e005208634 (diff) | |
llvmpipe: Avoid adding floating point zero to flat inputs.
Which could clobber integer inputs, if the addition is not optimized away
(e.g., if optimizations are disabled for debugging purposes).
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_bld_interp.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_interp.c b/src/gallium/drivers/llvmpipe/lp_bld_interp.c index 0608ab0a2a..0d51ccb034 100644 --- a/src/gallium/drivers/llvmpipe/lp_bld_interp.c +++ b/src/gallium/drivers/llvmpipe/lp_bld_interp.c @@ -239,7 +239,10 @@ coeffs_init(struct lp_build_interp_soa_context *bld, * Compute the attrib values on the upper-left corner of each quad. */ - a = LLVMBuildFAdd(builder, a, dadq2, ""); + if (interp != LP_INTERP_CONSTANT && + interp != LP_INTERP_FACING) { + a = LLVMBuildFAdd(builder, a, dadq2, ""); + } #if PERSPECTIVE_DIVIDE_PER_QUAD /* |