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gallivm: Fix lp_build_const_xxx for negative integers. 

Do proper rounding.

Thanks to Olivier Galibert for investigating this.
This commit is contained in:
José Fonseca 2012-05-15 22:34:36 +01:00
parent 1459c18f45
commit c95cea50a9
1 changed files with 6 additions and 5 deletions
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11
src/gallium/auxiliary/gallivm/lp_bld_const.c
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@ -36,6 +36,7 @@
#include <float.h>
#include "util/u_debug.h"
#include "util/u_math.h"
#include "lp_bld_type.h"
#include "lp_bld_const.h"
@ -297,7 +298,7 @@ lp_build_const_elem(struct gallivm_state *gallivm,
else {
double dscale = lp_const_scale(type);
elem = LLVMConstInt(elem_type, val*dscale + 0.5, 0);
elem = LLVMConstInt(elem_type, round(val*dscale), 0);
}
return elem;
@ -372,10 +373,10 @@ lp_build_const_aos(struct gallivm_state *gallivm,
else {
double dscale = lp_const_scale(type);
elems[swizzle[0]] = LLVMConstInt(elem_type, r*dscale + 0.5, 0);
elems[swizzle[1]] = LLVMConstInt(elem_type, g*dscale + 0.5, 0);
elems[swizzle[2]] = LLVMConstInt(elem_type, b*dscale + 0.5, 0);
elems[swizzle[3]] = LLVMConstInt(elem_type, a*dscale + 0.5, 0);
elems[swizzle[0]] = LLVMConstInt(elem_type, round(r*dscale), 0);
elems[swizzle[1]] = LLVMConstInt(elem_type, round(g*dscale), 0);
elems[swizzle[2]] = LLVMConstInt(elem_type, round(b*dscale), 0);
elems[swizzle[3]] = LLVMConstInt(elem_type, round(a*dscale), 0);
}
for(i = 4; i < type.length; ++i)