Mesa (master): r600g/llvm: Support for TBO

[Vincent Lejeune]

Module: Mesa
Branch: master
Commit: 0527317e1f89ce6cb7ba4193a9196c880d223e59
URL:    
http://cgit.freedesktop.org/mesa/mesa/commit/?id=0527317e1f89ce6cb7ba4193a9196c880d223e59

Author: Vincent Lejeune <v...@ovi.com>
Date:   Thu Feb 14 17:26:30 2013 +0100

r600g/llvm: Support for TBO

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

---

 src/gallium/drivers/r600/r600_llvm.c |   28 ++++++++++++++++++++++++++++
 1 files changed, 28 insertions(+), 0 deletions(-)

diff --git a/src/gallium/drivers/r600/r600_llvm.c 
b/src/gallium/drivers/r600/r600_llvm.c
index 59047e7..aee7cea 100644
--- 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)

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