radeonsi/nir: load VS inputs

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

3 files changed, 40 insertions, 2 deletions

diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index 0d25773cc3..44ba6ad5d9 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -409,10 +409,9 @@ static LLVMValueRef extract_double_to_float(struct si_shader_context *ctx,
 	return LLVMBuildFPTrunc(builder, value, ctx->f32, "");
 }
 
-static void declare_input_vs(
+void si_llvm_load_input_vs(
 	struct si_shader_context *ctx,
 	unsigned input_index,
-	const struct tgsi_full_declaration *decl,
 	LLVMValueRef out[4])
 {
 	struct gallivm_state *gallivm = &ctx->gallivm;
@@ -615,6 +614,14 @@ static void declare_input_vs(
 	}
 }
 
+static void declare_input_vs(
+	struct si_shader_context *ctx,
+	unsigned input_index,
+	const struct tgsi_full_declaration *decl,
+	LLVMValueRef out[4])
+{
+	si_llvm_load_input_vs(ctx, input_index, out);
+}
 
 static LLVMValueRef get_primitive_id(struct si_shader_context *ctx,
 				     unsigned swizzle)
diff --git a/src/gallium/drivers/radeonsi/si_shader_internal.h b/src/gallium/drivers/radeonsi/si_shader_internal.h
index 31b4c30ee9..a86fd02217 100644
--- a/src/gallium/drivers/radeonsi/si_shader_internal.h
+++ b/src/gallium/drivers/radeonsi/si_shader_internal.h
@@ -314,6 +314,11 @@ LLVMTypeRef si_const_array(LLVMTypeRef elem_type, int num_elements);
 void si_shader_context_init_alu(struct lp_build_tgsi_context *bld_base);
 void si_shader_context_init_mem(struct si_shader_context *ctx);
 
+void si_llvm_load_input_vs(
+	struct si_shader_context *ctx,
+	unsigned input_index,
+	LLVMValueRef out[4]);
+
 bool si_nir_build_llvm(struct si_shader_context *ctx, struct nir_shader *nir);
 
 #endif
diff --git a/src/gallium/drivers/radeonsi/si_shader_nir.c b/src/gallium/drivers/radeonsi/si_shader_nir.c
index 00bcf963be..ef0dd9dbf9 100644
--- a/src/gallium/drivers/radeonsi/si_shader_nir.c
+++ b/src/gallium/drivers/radeonsi/si_shader_nir.c
@@ -313,8 +313,34 @@ void si_nir_scan_shader(const struct nir_shader *nir,
 	}
 }
 
+static void declare_nir_input_vs(struct si_shader_context *ctx,
+				 struct nir_variable *variable, unsigned rel,
+				 LLVMValueRef out[4])
+{
+	si_llvm_load_input_vs(ctx, variable->data.driver_location / 4 + rel, out);
+}
+
 bool si_nir_build_llvm(struct si_shader_context *ctx, struct nir_shader *nir)
 {
+	nir_foreach_variable(variable, &nir->inputs) {
+		unsigned attrib_count = glsl_count_attribute_slots(variable->type,
+								   nir->stage == MESA_SHADER_VERTEX);
+		unsigned input_idx = variable->data.driver_location;
+
+		for (unsigned i = 0; i < attrib_count; ++i) {
+			LLVMValueRef data[4];
+
+			declare_nir_input_vs(ctx, variable, i, data);
+
+			for (unsigned chan = 0; chan < 4; chan++) {
+				ctx->inputs[input_idx + chan] =
+					LLVMBuildBitCast(ctx->ac.builder, data[chan], ctx->ac.i32, "");
+			}
+		}
+	}
+
+	ctx->abi.inputs = &ctx->inputs[0];
+
 	ac_nir_translate(&ctx->ac, &ctx->abi, nir, NULL);
 
 	return true;