Module: Mesa
Branch: master
Commit: d42229707ad4be9be5a8e122354be7102d6ec348
URL:
http://cgit.freedesktop.org/mesa/mesa/commit/?id=d42229707ad4be9be5a8e122354be7102d6ec348
Author: Jose Fonseca <jfons...@vmware.com>
Date: Wed Mar 10 17:22:30 2010 -0500
gallivm: simplify conditional branching
Instead of testing each component individually, we can test the entire
vector at once.
---
src/gallium/auxiliary/gallivm/lp_bld_tgsi_soa.c | 29 ++++++----------------
1 files changed, 8 insertions(+), 21 deletions(-)
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_tgsi_soa.c
b/src/gallium/auxiliary/gallivm/lp_bld_tgsi_soa.c
index aa57289..b3a0fe7 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_tgsi_soa.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_tgsi_soa.c
@@ -276,27 +276,14 @@ static void lp_exec_continue(struct lp_exec_mask *mask)
static void lp_exec_endloop(struct lp_exec_mask *mask)
{
LLVMBasicBlockRef endloop;
- LLVMValueRef i1cond;
-
- { /* convert our soa vector into i1 */
- int i;
- LLVMValueRef packed = 0;
- for (i = 0; i < mask->bld->type.length; ++i) {
- LLVMValueRef component = LLVMBuildExtractElement(
- mask->bld->builder,
- mask->break_mask,
- LLVMConstInt(LLVMInt32Type(), i, 0), "");
- if (packed)
- packed = LLVMBuildOr(mask->bld->builder,
- packed, component, "");
- else
- packed = component;
- }
- i1cond = LLVMBuildICmp(mask->bld->builder, LLVMIntNE,
- packed,
- LLVMConstNull(LLVMTypeOf(packed)),
- "");
- }
+ LLVMTypeRef reg_type = LLVMIntType(mask->bld->type.width*
+ mask->bld->type.length);
+ /* i1cond = (mask == 0) */
+ LLVMValueRef i1cond = LLVMBuildICmp(
+ mask->bld->builder,
+ LLVMIntNE,
+ LLVMBuildBitCast(mask->bld->builder, mask->break_mask, reg_type, ""),
+ LLVMConstNull(reg_type), "");
endloop = lp_build_insert_new_block(mask->bld->builder, "endloop");
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