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path: root/src/gallium/drivers/llvmpipe/lp_bld_interp.c
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Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_bld_interp.c')
-rw-r--r--src/gallium/drivers/llvmpipe/lp_bld_interp.c165
1 files changed, 90 insertions, 75 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_interp.c b/src/gallium/drivers/llvmpipe/lp_bld_interp.c
index 07c9e646630..d1f0185684d 100644
--- a/src/gallium/drivers/llvmpipe/lp_bld_interp.c
+++ b/src/gallium/drivers/llvmpipe/lp_bld_interp.c
@@ -105,15 +105,15 @@ coeffs_init(struct lp_build_interp_soa_context *bld,
for(chan = 0; chan < NUM_CHANNELS; ++chan) {
if(mask & (1 << chan)) {
LLVMValueRef index = LLVMConstInt(LLVMInt32Type(), attrib*NUM_CHANNELS + chan, 0);
- LLVMValueRef a0 = NULL;
- LLVMValueRef dadx = NULL;
- LLVMValueRef dady = NULL;
+ LLVMValueRef a0 = bld->base.undef;
+ LLVMValueRef dadx = bld->base.undef;
+ LLVMValueRef dady = bld->base.undef;
switch( interp ) {
- case TGSI_INTERPOLATE_PERSPECTIVE:
+ case LP_INTERP_PERSPECTIVE:
/* fall-through */
- case TGSI_INTERPOLATE_LINEAR:
+ case LP_INTERP_LINEAR:
dadx = LLVMBuildLoad(builder, LLVMBuildGEP(builder, dadx_ptr, &index, 1, ""), "");
dady = LLVMBuildLoad(builder, LLVMBuildGEP(builder, dady_ptr, &index, 1, ""), "");
dadx = lp_build_broadcast_scalar(&bld->base, dadx);
@@ -122,12 +122,17 @@ coeffs_init(struct lp_build_interp_soa_context *bld,
attrib_name(dady, attrib, chan, ".dady");
/* fall-through */
- case TGSI_INTERPOLATE_CONSTANT:
+ case LP_INTERP_CONSTANT:
+ case LP_INTERP_FACING:
a0 = LLVMBuildLoad(builder, LLVMBuildGEP(builder, a0_ptr, &index, 1, ""), "");
a0 = lp_build_broadcast_scalar(&bld->base, a0);
attrib_name(a0, attrib, chan, ".a0");
break;
+ case LP_INTERP_POSITION:
+ /* Nothing to do as the position coeffs are already setup in slot 0 */
+ break;
+
default:
assert(0);
break;
@@ -163,36 +168,44 @@ attribs_init(struct lp_build_interp_soa_context *bld)
const unsigned interp = bld->interp[attrib];
for(chan = 0; chan < NUM_CHANNELS; ++chan) {
if(mask & (1 << chan)) {
- LLVMValueRef a0 = bld->a0 [attrib][chan];
- LLVMValueRef dadx = bld->dadx[attrib][chan];
- LLVMValueRef dady = bld->dady[attrib][chan];
- LLVMValueRef res;
-
- res = a0;
-
- if (interp != TGSI_INTERPOLATE_CONSTANT) {
- /* res = res + x * dadx */
- res = lp_build_add(&bld->base, res, lp_build_mul(&bld->base, x, dadx));
- /* res = res + y * dady */
- res = lp_build_add(&bld->base, res, lp_build_mul(&bld->base, y, dady));
+ if (interp == LP_INTERP_POSITION) {
+ assert(attrib > 0);
+ bld->attribs[attrib][chan] = bld->attribs[0][chan];
}
+ else {
+ LLVMValueRef a0 = bld->a0 [attrib][chan];
+ LLVMValueRef dadx = bld->dadx[attrib][chan];
+ LLVMValueRef dady = bld->dady[attrib][chan];
+ LLVMValueRef res;
- /* Keep the value of the attribute before perspective divide
- * for faster updates.
- */
- bld->attribs_pre[attrib][chan] = res;
-
- if (interp == TGSI_INTERPOLATE_PERSPECTIVE) {
- LLVMValueRef w = bld->pos[3];
- assert(attrib != 0);
- if(!oow)
- oow = lp_build_rcp(&bld->base, w);
- res = lp_build_mul(&bld->base, res, oow);
- }
+ res = a0;
+
+ if (interp != LP_INTERP_CONSTANT &&
+ interp != LP_INTERP_FACING) {
+ /* res = res + x * dadx */
+ res = lp_build_add(&bld->base, res, lp_build_mul(&bld->base, x, dadx));
+ /* res = res + y * dady */
+ res = lp_build_add(&bld->base, res, lp_build_mul(&bld->base, y, dady));
+ }
- attrib_name(res, attrib, chan, "");
+ /* Keep the value of the attribute before perspective divide
+ * for faster updates.
+ */
+ bld->attribs_pre[attrib][chan] = res;
- bld->attribs[attrib][chan] = res;
+ if (interp == LP_INTERP_PERSPECTIVE) {
+ LLVMValueRef w = bld->pos[3];
+ assert(attrib != 0);
+ assert(bld->mask[0] & TGSI_WRITEMASK_W);
+ if(!oow)
+ oow = lp_build_rcp(&bld->base, w);
+ res = lp_build_mul(&bld->base, res, oow);
+ }
+
+ attrib_name(res, attrib, chan, "");
+
+ bld->attribs[attrib][chan] = res;
+ }
}
}
}
@@ -216,40 +229,48 @@ attribs_update(struct lp_build_interp_soa_context *bld, int quad_index)
const unsigned mask = bld->mask[attrib];
const unsigned interp = bld->interp[attrib];
- if (interp != TGSI_INTERPOLATE_CONSTANT) {
+ if (interp != LP_INTERP_CONSTANT &&
+ interp != LP_INTERP_FACING) {
for(chan = 0; chan < NUM_CHANNELS; ++chan) {
if(mask & (1 << chan)) {
- LLVMValueRef dadx = bld->dadx[attrib][chan];
- LLVMValueRef dady = bld->dady[attrib][chan];
- LLVMValueRef res;
-
- res = bld->attribs_pre[attrib][chan];
-
- if (quad_index == 1 || quad_index == 3) {
- /* top-right or bottom-right quad */
- /* build res = res + dadx + dadx */
- res = lp_build_add(&bld->base, res, dadx);
- res = lp_build_add(&bld->base, res, dadx);
+ if (interp == LP_INTERP_POSITION) {
+ assert(attrib > 0);
+ bld->attribs[attrib][chan] = bld->attribs[0][chan];
}
-
- if (quad_index == 2 || quad_index == 3) {
- /* bottom-left or bottom-right quad */
- /* build res = res + dady + dady */
- res = lp_build_add(&bld->base, res, dady);
- res = lp_build_add(&bld->base, res, dady);
+ else {
+ LLVMValueRef dadx = bld->dadx[attrib][chan];
+ LLVMValueRef dady = bld->dady[attrib][chan];
+ LLVMValueRef res;
+
+ res = bld->attribs_pre[attrib][chan];
+
+ if (quad_index == 1 || quad_index == 3) {
+ /* top-right or bottom-right quad */
+ /* build res = res + dadx + dadx */
+ res = lp_build_add(&bld->base, res, dadx);
+ res = lp_build_add(&bld->base, res, dadx);
+ }
+
+ if (quad_index == 2 || quad_index == 3) {
+ /* bottom-left or bottom-right quad */
+ /* build res = res + dady + dady */
+ res = lp_build_add(&bld->base, res, dady);
+ res = lp_build_add(&bld->base, res, dady);
+ }
+
+ if (interp == LP_INTERP_PERSPECTIVE) {
+ LLVMValueRef w = bld->pos[3];
+ assert(attrib != 0);
+ assert(bld->mask[0] & TGSI_WRITEMASK_W);
+ if(!oow)
+ oow = lp_build_rcp(&bld->base, w);
+ res = lp_build_mul(&bld->base, res, oow);
+ }
+
+ attrib_name(res, attrib, chan, "");
+
+ bld->attribs[attrib][chan] = res;
}
-
- if (interp == TGSI_INTERPOLATE_PERSPECTIVE) {
- LLVMValueRef w = bld->pos[3];
- assert(attrib != 0);
- if(!oow)
- oow = lp_build_rcp(&bld->base, w);
- res = lp_build_mul(&bld->base, res, oow);
- }
-
- attrib_name(res, attrib, chan, "");
-
- bld->attribs[attrib][chan] = res;
}
}
}
@@ -315,8 +336,8 @@ pos_update(struct lp_build_interp_soa_context *bld, int quad_index)
*/
void
lp_build_interp_soa_init(struct lp_build_interp_soa_context *bld,
- const struct tgsi_shader_info *info,
- boolean flatshade,
+ unsigned num_inputs,
+ const struct lp_shader_input *inputs,
LLVMBuilderRef builder,
struct lp_type type,
LLVMValueRef a0_ptr,
@@ -339,20 +360,14 @@ lp_build_interp_soa_init(struct lp_build_interp_soa_context *bld,
/* Position */
bld->num_attribs = 1;
bld->mask[0] = TGSI_WRITEMASK_ZW;
- bld->interp[0] = TGSI_INTERPOLATE_LINEAR;
+ bld->interp[0] = LP_INTERP_LINEAR;
/* Inputs */
- for (attrib = 0; attrib < info->num_inputs; ++attrib) {
- bld->mask[1 + attrib] = info->input_usage_mask[attrib];
-
- if (info->input_semantic_name[attrib] == TGSI_SEMANTIC_COLOR &&
- flatshade)
- bld->interp[1 + attrib] = TGSI_INTERPOLATE_CONSTANT;
- else
- bld->interp[1 + attrib] = info->input_interpolate[attrib];
-
+ for (attrib = 0; attrib < num_inputs; ++attrib) {
+ bld->mask[1 + attrib] = inputs[attrib].usage_mask;
+ bld->interp[1 + attrib] = inputs[attrib].interp;
}
- bld->num_attribs = 1 + info->num_inputs;
+ bld->num_attribs = 1 + num_inputs;
/* Ensure all masked out input channels have a valid value */
for (attrib = 0; attrib < bld->num_attribs; ++attrib) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-25 11:48:54 +0000