[Mesa-dev] [PATCH 13/19] radeonsi: support 64-bit system values

[Nicolai Hähnle]

From: Nicolai Hähnle <nicolai.haehnle at amd.com>

For simplicitly, always store system values as 32-bit values or arrays
of 32-bit values. 64-bit values are unpacked and packed accordingly.
---
 .../drivers/radeonsi/si_shader_tgsi_setup.c        | 24 ++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/src/gallium/drivers/radeonsi/si_shader_tgsi_setup.c b/src/gallium/drivers/radeonsi/si_shader_tgsi_setup.c
index efc9452..da463c2 100644
--- a/src/gallium/drivers/radeonsi/si_shader_tgsi_setup.c
+++ b/src/gallium/drivers/radeonsi/si_shader_tgsi_setup.c
@@ -757,27 +757,43 @@ LLVMValueRef si_llvm_emit_fetch(struct lp_build_tgsi_context *bld_base,
 
 	return bitcast(bld_base, type, result);
 }
 
 static LLVMValueRef fetch_system_value(struct lp_build_tgsi_context *bld_base,
 				       const struct tgsi_full_src_register *reg,
 				       enum tgsi_opcode_type type,
 				       unsigned swizzle)
 {
 	struct si_shader_context *ctx = si_shader_context(bld_base);
-	struct gallivm_state *gallivm = bld_base->base.gallivm;
-
+	LLVMBuilderRef builder = ctx->gallivm.builder;
 	LLVMValueRef cval = ctx->system_values[reg->Register.Index];
+
+	if (tgsi_type_is_64bit(type)) {
+		LLVMValueRef lo, hi;
+
+		assert(swizzle == 0 || swizzle == 2);
+
+		lo = LLVMBuildExtractElement(
+			builder, cval, LLVMConstInt(ctx->i32, swizzle, 0), "");
+		hi = LLVMBuildExtractElement(
+			builder, cval, LLVMConstInt(ctx->i32, swizzle + 1, 0), "");
+
+		return si_llvm_emit_fetch_64bit(bld_base, type, lo, hi);
+	}
+
 	if (LLVMGetTypeKind(LLVMTypeOf(cval)) == LLVMVectorTypeKind) {
-		cval = LLVMBuildExtractElement(gallivm->builder, cval,
-					       lp_build_const_int32(gallivm, swizzle), "");
+		cval = LLVMBuildExtractElement(
+			builder, cval, LLVMConstInt(ctx->i32, swizzle, 0), "");
+	} else {
+		assert(swizzle == 0);
 	}
+
 	return bitcast(bld_base, type, cval);
 }
 
 static void emit_declaration(struct lp_build_tgsi_context *bld_base,
 			     const struct tgsi_full_declaration *decl)
 {
 	struct si_shader_context *ctx = si_shader_context(bld_base);
 	LLVMBuilderRef builder = bld_base->base.gallivm->builder;
 	unsigned first, last, i;
 	switch(decl->Declaration.File) {
-- 
2.9.3