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ac/nir: Add deref interp support.

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Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Acked-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Bas Nieuwenhuizen
2018-04-25 18:57:46 +02:00
committed by Jason Ekstrand
parent d00e7d42f5
commit 657cedb12f
1 changed files with 27 additions and 6 deletions
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33
src/amd/common/ac_nir_to_llvm.c
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@@ -2897,24 +2897,42 @@ static LLVMValueRef visit_interp(struct ac_nir_context *ctx,
LLVMValueRef src_c0 = NULL;
LLVMValueRef src_c1 = NULL;
LLVMValueRef src0 = NULL;
int input_index = instr->variables[0]->var->data.location - VARYING_SLOT_VAR0;
bool uses_deref_chain;
switch (instr->intrinsic) {
case nir_intrinsic_interp_var_at_centroid:
case nir_intrinsic_interp_var_at_sample:
case nir_intrinsic_interp_var_at_offset:
uses_deref_chain = true;
break;
default:
uses_deref_chain = false;
break;
}
nir_variable *var = uses_deref_chain ? instr->variables[0]->var : nir_deref_instr_get_variable(nir_instr_as_deref(instr->src[0].ssa->parent_instr));
int input_index = var->data.location - VARYING_SLOT_VAR0;
switch (instr->intrinsic) {
case nir_intrinsic_interp_var_at_centroid:
case nir_intrinsic_interp_deref_at_centroid:
location = INTERP_CENTROID;
break;
case nir_intrinsic_interp_var_at_sample:
case nir_intrinsic_interp_var_at_offset:
case nir_intrinsic_interp_deref_at_sample:
case nir_intrinsic_interp_deref_at_offset:
location = INTERP_CENTER;
src0 = get_src(ctx, instr->src[0]);
src0 = get_src(ctx, instr->src[uses_deref_chain ? 0 : 1]);
break;
default:
break;
}
if (instr->intrinsic == nir_intrinsic_interp_var_at_offset) {
if (instr->intrinsic == nir_intrinsic_interp_var_at_offset ||
instr->intrinsic == nir_intrinsic_interp_deref_at_offset) {
src_c0 = ac_to_float(&ctx->ac, LLVMBuildExtractElement(ctx->ac.builder, src0, ctx->ac.i32_0, ""));
src_c1 = ac_to_float(&ctx->ac, LLVMBuildExtractElement(ctx->ac.builder, src0, ctx->ac.i32_1, ""));
} else if (instr->intrinsic == nir_intrinsic_interp_var_at_sample) {
} else if (instr->intrinsic == nir_intrinsic_interp_var_at_sample ||
instr->intrinsic == nir_intrinsic_interp_deref_at_sample) {
LLVMValueRef sample_position;
LLVMValueRef halfval = LLVMConstReal(ctx->ac.f32, 0.5f);
@@ -2926,7 +2944,7 @@ static LLVMValueRef visit_interp(struct ac_nir_context *ctx,
src_c1 = LLVMBuildExtractElement(ctx->ac.builder, sample_position, ctx->ac.i32_1, "");
src_c1 = LLVMBuildFSub(ctx->ac.builder, src_c1, halfval, "");
}
interp_param = ctx->abi->lookup_interp_param(ctx->abi, instr->variables[0]->var->data.interpolation, location);
interp_param = ctx->abi->lookup_interp_param(ctx->abi, var->data.interpolation, location);
attr_number = LLVMConstInt(ctx->ac.i32, input_index, false);
if (location == INTERP_CENTER) {
@@ -2990,7 +3008,7 @@ static LLVMValueRef visit_interp(struct ac_nir_context *ctx,
}
}
return ac_build_varying_gather_values(&ctx->ac, result, instr->num_components,
instr->variables[0]->var->data.location_frac);
var->data.location_frac);
}
static void visit_intrinsic(struct ac_nir_context *ctx,
@@ -3260,6 +3278,9 @@ static void visit_intrinsic(struct ac_nir_context *ctx,
case nir_intrinsic_interp_var_at_centroid:
case nir_intrinsic_interp_var_at_sample:
case nir_intrinsic_interp_var_at_offset:
case nir_intrinsic_interp_deref_at_centroid:
case nir_intrinsic_interp_deref_at_sample:
case nir_intrinsic_interp_deref_at_offset:
result = visit_interp(ctx, instr);
break;
case nir_intrinsic_emit_vertex: