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llvmpipe: comments

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This commit is contained in:
Brian Paul 2009-12-03 11:39:40 -07:00
parent 866e6856d3
commit e01fa1eaec
1 changed files with 9 additions and 0 deletions
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9
src/gallium/drivers/llvmpipe/lp_bld_logic.c
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@ -41,6 +41,10 @@
#include "lp_bld_logic.h"
/**
* Build code to compare two values 'a' and 'b' using the given func.
* \parm func one of PIPE_FUNC_x
*/
LLVMValueRef
lp_build_cmp(struct lp_build_context *bld,
unsigned func,
@ -56,6 +60,9 @@ lp_build_cmp(struct lp_build_context *bld,
LLVMValueRef res;
unsigned i;
assert(func >= PIPE_FUNC_NEVER);
assert(func <= PIPE_FUNC_ALWAYS);
if(func == PIPE_FUNC_NEVER)
return zeros;
if(func == PIPE_FUNC_ALWAYS)
@ -68,6 +75,7 @@ lp_build_cmp(struct lp_build_context *bld,
#if defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64)
if(type.width * type.length == 128) {
if(type.floating && util_cpu_caps.has_sse) {
/* float[4] comparison */
LLVMValueRef args[3];
unsigned cc;
boolean swap;
@ -117,6 +125,7 @@ lp_build_cmp(struct lp_build_context *bld,
return res;
}
else if(util_cpu_caps.has_sse2) {
/* int[4] comparison */
static const struct {
unsigned swap:1;
unsigned eq:1;