KonstantinSeurer
/
mesa
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

gallivm: Add a lp_build_const_elem().

This commit is contained in:
José Fonseca 2010-06-02 16:00:40 +01:00
parent 21a6bf8624
commit 952d188c3c
2 changed files with 36 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
src/gallium/auxiliary/gallivm/lp_bld_const.c
View File

@ -279,6 +279,29 @@ lp_build_one(struct lp_type type)
}
/**
* Build constant-valued element from a scalar value.
*/
LLVMValueRef
lp_build_const_elem(struct lp_type type,
double val)
{
LLVMTypeRef elem_type = lp_build_elem_type(type);
LLVMValueRef elem;
if(type.floating) {
elem = LLVMConstReal(elem_type, val);
}
else {
double dscale = lp_const_scale(type);
elem = LLVMConstInt(elem_type, val*dscale + 0.5, 0);
}
return elem;
}
/**
* Build constant-valued vector from a scalar value.
*/
@ -286,28 +309,16 @@ LLVMValueRef
lp_build_const_vec(struct lp_type type,
double val)
{
LLVMTypeRef elem_type = lp_build_elem_type(type);
LLVMValueRef elems[LP_MAX_VECTOR_LENGTH];
unsigned i;
assert(type.length <= LP_MAX_VECTOR_LENGTH);
if(type.floating) {
elems[0] = LLVMConstReal(elem_type, val);
if (type.length == 1) {
return lp_build_const_elem(type, val);
} else {
LLVMValueRef elems[LP_MAX_VECTOR_LENGTH];
unsigned i;
elems[0] = lp_build_const_elem(type, val);
for(i = 1; i < type.length; ++i)
elems[i] = elems[0];
return LLVMConstVector(elems, type.length);
}
else {
double dscale = lp_const_scale(type);
elems[0] = LLVMConstInt(elem_type, val*dscale + 0.5, 0);
}
if (type.length == 1)
return elems[0];
for(i = 1; i < type.length; ++i)
elems[i] = elems[0];
return LLVMConstVector(elems, type.length);
}

4
src/gallium/auxiliary/gallivm/lp_bld_const.h
View File

@ -84,6 +84,10 @@ LLVMValueRef
lp_build_one(struct lp_type type);
LLVMValueRef
lp_build_const_elem(struct lp_type type,
double val);
LLVMValueRef
lp_build_const_vec(struct lp_type type, double val);