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authorHui Qi Tay <[email protected]>2010-11-13 21:39:50 +0000
committerKeith Whitwell <[email protected]>2010-11-15 17:21:35 +0000
commite3f106b5fe36ad558b3971ba88802c5d80b007de (patch)
tree794d36b27a471c3086a4074e873f24d9f0132a8b /src/gallium/drivers/llvmpipe
parent315f8daab1598a4de709d469a559b5aa09107404 (diff)
llvmpipe: clean up polygon offset function in lp setup code
Diffstat (limited to 'src/gallium/drivers/llvmpipe')
-rw-r--r--src/gallium/drivers/llvmpipe/lp_state_setup.c60
1 files changed, 16 insertions, 44 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_state_setup.c b/src/gallium/drivers/llvmpipe/lp_state_setup.c
index 7751b7d6c37..03b411a3364 100644
--- a/src/gallium/drivers/llvmpipe/lp_state_setup.c
+++ b/src/gallium/drivers/llvmpipe/lp_state_setup.c
@@ -202,29 +202,16 @@ static LLVMValueRef
vert_clamp(LLVMBuilderRef b,
LLVMValueRef x,
LLVMValueRef min,
- LLVMValueRef max,
- LLVMValueRef clamp_ptr)
+ LLVMValueRef max)
{
- struct lp_build_if_state if_state;
LLVMValueRef min_result = LLVMBuildFCmp(b, LLVMRealUGT, min, x, "");
LLVMValueRef max_result = LLVMBuildFCmp(b, LLVMRealUGT, x, max, "");
-
- lp_build_if(&if_state, b, min_result);
- {
- LLVMBuildStore(b, min, clamp_ptr);
- }
- lp_build_endif(&if_state);
- lp_build_if(&if_state, b, max_result);
- {
- LLVMBuildStore(b, max, clamp_ptr);
- }
- lp_build_else(&if_state);
- {
- LLVMBuildStore(b, x, clamp_ptr);
- }
- lp_build_endif(&if_state);
-
- return LLVMBuildLoad(b, clamp_ptr,"");
+ LLVMValueRef clamp_value;
+
+ clamp_value = LLVMBuildSelect(b, min_result, min, x, "");
+ clamp_value = LLVMBuildSelect(b, max_result, max, x, "");
+
+ return clamp_value;
}
static void
@@ -542,11 +529,11 @@ lp_do_offset_tri(LLVMBuilderRef b,
struct lp_setup_args *args,
const struct lp_setup_variant_key *key)
{
- struct lp_build_if_state if_state;
struct lp_build_context bld;
LLVMValueRef zoffset, mult;
LLVMValueRef z0_new, z1_new, z2_new;
- LLVMValueRef dzdx0, dzdx, dzdy0, dzdy, max;
+ LLVMValueRef dzdx0, dzdx, dzdy0, dzdy;
+ LLVMValueRef max, max_value;
LLVMValueRef idx[2];
LLVMValueRef one = LLVMConstReal(LLVMFloatType(), 1.0);
@@ -584,10 +571,6 @@ lp_do_offset_tri(LLVMBuilderRef b,
LLVMValueRef dx02_dz12 = LLVMBuildFMul(b, dx02, dz12, "dx02_dz12");
LLVMValueRef res1 = LLVMBuildFSub(b, dy02_dz12, dz02_dy12, "res1");
LLVMValueRef res2 = LLVMBuildFSub(b, dz02_dx12, dx02_dz12, "res2");
-
- /* for the if-else functions phi's */
- LLVMValueRef zoffset_ptr = lp_build_alloca(b, LLVMFloatType(), "");
- LLVMValueRef clamp_ptr = lp_build_alloca(b, LLVMFloatType(), "");
/* dzdx = fabsf(res1 * inv_det), dydx = fabsf(res2 * inv_det)*/
lp_build_context_init(&bld, b, lp_type_float(32));
@@ -598,26 +581,15 @@ lp_do_offset_tri(LLVMBuilderRef b,
/* zoffset = offset->units + MAX2(dzdx, dzdy) * offset->scale */
max = LLVMBuildFCmp(b, LLVMRealUGT, dzdx, dzdy, "");
- lp_build_if(&if_state, b, max);
- {
- mult = LLVMBuildFMul(b, dzdx, LLVMConstReal(LLVMFloatType(), key->scale), "");
- zoffset = LLVMBuildFAdd(b, LLVMConstReal(LLVMFloatType(), key->units), mult, "zoffset");
- LLVMBuildStore(b, zoffset, zoffset_ptr);
- }
- lp_build_else(&if_state);
- {
- mult = LLVMBuildFMul(b, dzdy, LLVMConstReal(LLVMFloatType(), key->scale), "");
- zoffset = LLVMBuildFAdd(b, LLVMConstReal(LLVMFloatType(), key->units), mult, "zoffset");
- LLVMBuildStore(b, zoffset, zoffset_ptr);
- }
- lp_build_endif(&if_state);
+ max_value = LLVMBuildSelect(b, max, dzdx, dzdy, "max");
- zoffset = LLVMBuildLoad(b, zoffset_ptr,"");
+ mult = LLVMBuildFMul(b, max_value, LLVMConstReal(LLVMFloatType(), key->scale), "");
+ zoffset = LLVMBuildFAdd(b, LLVMConstReal(LLVMFloatType(), key->units), mult, "zoffset");
/* clamp and do offset */
- z0_new = vert_clamp(b, LLVMBuildFAdd(b, v0_z, zoffset, ""), zero, one, clamp_ptr);
- z1_new = vert_clamp(b, LLVMBuildFAdd(b, v1_z, zoffset, ""), zero, one, clamp_ptr);
- z2_new = vert_clamp(b, LLVMBuildFAdd(b, v2_z, zoffset, ""), zero, one, clamp_ptr);
+ z0_new = vert_clamp(b, LLVMBuildFAdd(b, v0_z, zoffset, ""), zero, one);
+ z1_new = vert_clamp(b, LLVMBuildFAdd(b, v1_z, zoffset, ""), zero, one);
+ z2_new = vert_clamp(b, LLVMBuildFAdd(b, v2_z, zoffset, ""), zero, one);
/* store back new offsetted z values */
idx[0] = LLVMConstInt(LLVMInt32Type(), 0, 0);
@@ -716,7 +688,7 @@ generate_setup_variant(struct llvmpipe_screen *screen,
if (variant->key.twoside){
lp_twoside(builder, &args, &variant->key);
}
- if (variant->key.scale){
+ if (variant->key.scale || variant->key.units){
lp_do_offset_tri(builder, &args, &variant->key);
}
emit_tri_coef(builder, &variant->key, &args);