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| author | Brian Paul <brianp@vmware.com> | 2009-12-03 11:40:49 -0700 |
|---|---|---|
| committer | Brian Paul <brianp@vmware.com> | 2009-12-03 11:40:49 -0700 |
| commit | 69fe4281ea19e29d534c74d65789494f7be4d4e3 (patch) | |
| tree | ef5f5e50bc0e0eed0ea43039a2718636dadb8b03 | |
| parent | e01fa1eaec34675d0b30127de4f78b020a092a83 (diff) | |
llvmpipe: additional comment about float->uint conversion
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_bld_conv.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_conv.c b/src/gallium/drivers/llvmpipe/lp_bld_conv.c index 20c8710214b..1df938529c4 100644 --- a/src/gallium/drivers/llvmpipe/lp_bld_conv.c +++ b/src/gallium/drivers/llvmpipe/lp_bld_conv.c @@ -124,6 +124,10 @@ lp_build_clamped_float_to_unsigned_norm(LLVMBuilderRef builder, res = LLVMBuildShl(builder, res, lp_build_int_const_scalar(src_type, shift), ""); /* TODO: Fill in the empty lower bits for additional precision? */ + /* YES: this fixes progs/trivial/tri-z-eq.c. + * Otherwise vertex Z=1.0 values get converted to something like + * 0xfffffb00 and the test for equality with 0xffffffff fails. + */ #if 0 { LLVMValueRef msb; |