r600g/llvm: Support for TBO

Reviewed-by: Tom Stellard <thomas.stellard at amd.com>

diff --git a/src/gallium/drivers/r600/r600_llvm.c b/src/gallium/drivers/r600/r600_llvm.c
index 59047e7779bf4c035c080f6b5830cd4f10668990..aee7cea0d5adfdfed2dc0092fc860b32fdeae53d 100644 (file)
--- a/src/gallium/drivers/r600/r600_llvm.c
+++ b/src/gallium/drivers/r600/r600_llvm.c
@@ -412,6 +412,34 @@ static void llvm_emit_tex(
        LLVMValueRef args[6];
        unsigned c, sampler_src;
 
+       if (emit_data->inst->Texture.Texture == TGSI_TEXTURE_BUFFER) {
+               switch (emit_data->inst->Instruction.Opcode) {
+               case TGSI_OPCODE_TXQ: {
+                       LLVMValueRef offset[2] = {
+                               LLVMConstInt(LLVMInt64TypeInContext(bld_base->base.gallivm->context), 0, false),
+                               lp_build_const_int32(bld_base->base.gallivm, 1)
+                       };
+                       LLVMTypeRef const_ptr_type = LLVMPointerType(LLVMArrayType(LLVMVectorType(bld_base->base.elem_type, 4), 1024),
+                                                                       R600_BUFFER_INFO_CONST_BUFFER);
+                       LLVMValueRef const_ptr = LLVMBuildIntToPtr(bld_base->base.gallivm->builder, lp_build_const_int32(bld_base->base.gallivm, 0), const_ptr_type, "");
+                       LLVMValueRef ptr = LLVMBuildGEP(bld_base->base.gallivm->builder, const_ptr, offset, 2, "");
+                       LLVMValueRef cvecval = LLVMBuildLoad(bld_base->base.gallivm->builder, ptr, "");
+                       emit_data->output[0] = cvecval;
+                       return;
+               }
+               case TGSI_OPCODE_TXF: {
+                       args[0] = LLVMBuildExtractElement(gallivm->builder, emit_data->args[0], lp_build_const_int32(gallivm, 0), "");
+                       args[1] = lp_build_const_int32(gallivm, R600_MAX_CONST_BUFFERS);
+                       emit_data->output[0] = build_intrinsic(gallivm->builder,
+                                                       "llvm.R600.load.texbuf",
+                                                       emit_data->dst_type, args, 2, LLVMReadNoneAttribute);
+               }
+                       return;
+               default:
+                       break;
+               }
+       }
+
        assert(emit_data->arg_count + 2 <= Elements(args));
 
        for (c = 0; c < emit_data->arg_count; ++c)