Mesa (master): llvmpipe: fix broken lp_build_abs()
Jose Fonseca
jrfonseca at kemper.freedesktop.org
Wed Dec 16 15:08:55 UTC 2009
Module: Mesa
Branch: master
Commit: 43d6c81ae2b3cb263f803bb9881c0823c1ed7dda
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=43d6c81ae2b3cb263f803bb9881c0823c1ed7dda
Author: Brian Paul <brianp at vmware.com>
Date: Mon Dec 14 15:24:31 2009 -0700
llvmpipe: fix broken lp_build_abs()
---
src/gallium/drivers/llvmpipe/lp_bld_arit.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_arit.c b/src/gallium/drivers/llvmpipe/lp_bld_arit.c
index 847c2a3..eea6b5d 100644
--- a/src/gallium/drivers/llvmpipe/lp_bld_arit.c
+++ b/src/gallium/drivers/llvmpipe/lp_bld_arit.c
@@ -629,7 +629,8 @@ lp_build_abs(struct lp_build_context *bld,
if(type.floating) {
/* Mask out the sign bit */
LLVMTypeRef int_vec_type = lp_build_int_vec_type(type);
- LLVMValueRef mask = lp_build_int_const_scalar(type, ((unsigned long long)1 << type.width) - 1);
+ unsigned long absMask = ~(1 << (type.width - 1));
+ LLVMValueRef mask = lp_build_int_const_scalar(type, ((unsigned long long) absMask));
a = LLVMBuildBitCast(bld->builder, a, int_vec_type, "");
a = LLVMBuildAnd(bld->builder, a, mask, "");
a = LLVMBuildBitCast(bld->builder, a, vec_type, "");
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