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llvmpipe: Fix one const generation for some signed integers.

This commit is contained in:
José Fonseca 2009-08-08 22:56:22 +01:00
parent 8244d6e5ad
commit a9771d2b75
1 changed files with 7 additions and 1 deletions
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8
src/gallium/drivers/llvmpipe/lp_bld_const.c
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@ -125,14 +125,20 @@ lp_build_one(union lp_type type)
elems[0] = LLVMConstInt(elem_type, 1LL << (type.width/2), 0);
else if(!type.norm)
elems[0] = LLVMConstInt(elem_type, 1, 0);
else if(type.sign)
elems[0] = LLVMConstInt(elem_type, (1LL << (type.width - 1)) - 1, 0);
else {
/* special case' -- 1.0 for normalized types is more easily attained if
* we start with a vector consisting of all bits set */
LLVMTypeRef vec_type = LLVMVectorType(elem_type, type.length);
LLVMValueRef vec = LLVMConstAllOnes(vec_type);
#if 0
if(type.sign)
vec = LLVMConstLShr(vec, LLVMConstInt(LLVMInt32Type(), 1, 0));
/* TODO: Unfortunately this caused "Tried to create a shift operation
* on a non-integer type!" */
vec = LLVMConstLShr(vec, lp_build_int_const_uni(type, 1));
#endif
return vec;
}