Mesa (master): radeonsi: create get_tcs_tes_buffer_address helper

[Timothy Arceri]

Module: Mesa
Branch: master
Commit: 3308f4b81a14ce14aa0efdd3d6a2383c4925fea3
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=3308f4b81a14ce14aa0efdd3d6a2383c4925fea3

Author: Timothy Arceri <tarceri at itsqueeze.com>
Date:   Thu Nov 23 12:59:01 2017 +1100

radeonsi: create get_tcs_tes_buffer_address helper

This will be shared between the NIR and TGSI backends.

Reviewed-by: Nicolai Hähnle <nicolai.haehnle at amd.com>

---

 src/gallium/drivers/radeonsi/si_shader.c | 44 +++++++++++++++++++++++---------
 1 file changed, 32 insertions(+), 12 deletions(-)

diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index 5da9ec0bf5..0077054749 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -977,6 +977,34 @@ static LLVMValueRef get_tcs_tes_buffer_address(struct si_shader_context *ctx,
 	return base_addr;
 }
 
+/* This is a generic helper that can be shared by the NIR and TGSI backends */
+static LLVMValueRef get_tcs_tes_buffer_address_from_generic_indices(
+					struct si_shader_context *ctx,
+					LLVMValueRef vertex_index,
+					LLVMValueRef param_index,
+					unsigned param_base,
+					ubyte *name,
+					ubyte *index,
+					bool is_patch)
+{
+	unsigned param_index_base;
+
+	param_index_base = is_patch ?
+		si_shader_io_get_unique_index_patch(name[param_base], index[param_base]) :
+		si_shader_io_get_unique_index(name[param_base], index[param_base]);
+
+	if (param_index) {
+		param_index = LLVMBuildAdd(ctx->ac.builder, param_index,
+					   LLVMConstInt(ctx->i32, param_index_base, 0),
+					   "");
+	} else {
+		param_index = LLVMConstInt(ctx->i32, param_index_base, 0);
+	}
+
+	return get_tcs_tes_buffer_address(ctx, get_rel_patch_id(ctx),
+					  vertex_index, param_index);
+}
+
 static LLVMValueRef get_tcs_tes_buffer_address_from_reg(
                                        struct si_shader_context *ctx,
                                        const struct tgsi_full_dst_register *dst,
@@ -987,7 +1015,7 @@ static LLVMValueRef get_tcs_tes_buffer_address_from_reg(
 	struct tgsi_full_src_register reg;
 	LLVMValueRef vertex_index = NULL;
 	LLVMValueRef param_index = NULL;
-	unsigned param_index_base, param_base;
+	unsigned param_base;
 
 	reg = src ? *src : tgsi_full_src_register_from_dst(dst);
 
@@ -1025,19 +1053,11 @@ static LLVMValueRef get_tcs_tes_buffer_address_from_reg(
 
 	} else {
 		param_base = reg.Register.Index;
-		param_index = ctx->i32_0;
 	}
 
-	param_index_base = reg.Register.Dimension ?
-		si_shader_io_get_unique_index(name[param_base], index[param_base]) :
-		si_shader_io_get_unique_index_patch(name[param_base], index[param_base]);
-
-	param_index = LLVMBuildAdd(ctx->ac.builder, param_index,
-	                           LLVMConstInt(ctx->i32, param_index_base, 0),
-	                           "");
-
-	return get_tcs_tes_buffer_address(ctx, get_rel_patch_id(ctx),
-					  vertex_index, param_index);
+	return get_tcs_tes_buffer_address_from_generic_indices(ctx, vertex_index,
+							       param_index, param_base,
+							       name, index, !reg.Register.Dimension);
 }
 
 static LLVMValueRef buffer_load(struct lp_build_tgsi_context *bld_base,