[Mesa-dev] [PATCH 06/11] radeonsi: add shader buffer support to TGSI_OPCODE_ATOM*

[Nicolai Hähnle]

From: Nicolai Hähnle <nicolai.haeh...@amd.com>

---
 src/gallium/drivers/radeonsi/si_shader.c | 61 ++++++++++++++++++++++++--------
 1 file changed, 46 insertions(+), 15 deletions(-)

diff --git a/src/gallium/drivers/radeonsi/si_shader.c 
b/src/gallium/drivers/radeonsi/si_shader.c
index b5e962f..795140b 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -2774,6 +2774,24 @@ static void membar_emit(
        emit_optimization_barrier(ctx);
 }
 
+static LLVMValueRef
+shader_buffer_fetch_rsrc(struct si_shader_context *ctx,
+                        const struct tgsi_full_src_register *reg)
+{
+       LLVMValueRef ind_index;
+       LLVMValueRef rsrc_ptr;
+
+       if (!reg->Register.Indirect)
+               return ctx->shader_buffers[reg->Register.Index];
+
+       ind_index = get_bounded_indirect_index(ctx, &reg->Indirect,
+                                              reg->Register.Index,
+                                              SI_NUM_SHADER_BUFFERS);
+
+       rsrc_ptr = LLVMGetParam(ctx->radeon_bld.main_fn, 
SI_PARAM_SHADER_BUFFERS);
+       return build_indexed_load_const(ctx, rsrc_ptr, ind_index);
+}
+
 static bool tgsi_is_array_sampler(unsigned target)
 {
        return target == TGSI_TEXTURE_1D_ARRAY ||
@@ -3122,18 +3140,12 @@ static void atomic_fetch_args(
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        const struct tgsi_full_instruction * inst = emit_data->inst;
-       unsigned target = inst->Memory.Texture;
        LLVMValueRef data1, data2;
-       LLVMValueRef coords;
        LLVMValueRef rsrc;
        LLVMValueRef tmp;
 
        emit_data->dst_type = bld_base->base.elem_type;
 
-       image_fetch_rsrc(bld_base, &inst->Src[0], target != TGSI_TEXTURE_BUFFER,
-                        &rsrc);
-       coords = image_fetch_coords(bld_base, inst, 1);
-
        tmp = lp_build_emit_fetch(bld_base, inst, 2, 0);
        data1 = LLVMBuildBitCast(builder, tmp, bld_base->uint_bld.elem_type, 
"");
 
@@ -3149,15 +3161,34 @@ static void atomic_fetch_args(
                emit_data->args[emit_data->arg_count++] = data2;
        emit_data->args[emit_data->arg_count++] = data1;
 
-       if (target == TGSI_TEXTURE_BUFFER) {
-               rsrc = extract_rsrc_top_half(ctx, rsrc);
-               buffer_append_args(ctx, emit_data, rsrc, coords,
-                                  bld_base->uint_bld.zero, true);
+       if (inst->Src[0].Register.File == TGSI_FILE_BUFFER) {
+               LLVMValueRef offset;
+
+               rsrc = shader_buffer_fetch_rsrc(ctx, &inst->Src[0]);
+
+               tmp = lp_build_emit_fetch(bld_base, inst, 1, 0);
+               offset = LLVMBuildBitCast(builder, tmp, 
bld_base->uint_bld.elem_type, "");
+
+               buffer_append_args(ctx, emit_data, rsrc, 
bld_base->uint_bld.zero,
+                                  offset, true);
        } else {
-               emit_data->args[emit_data->arg_count++] = coords;
-               emit_data->args[emit_data->arg_count++] = rsrc;
+               unsigned target = inst->Memory.Texture;
+               LLVMValueRef coords;
+
+               image_fetch_rsrc(bld_base, &inst->Src[0],
+                                target != TGSI_TEXTURE_BUFFER, &rsrc);
+               coords = image_fetch_coords(bld_base, inst, 1);
 
-               image_append_args(ctx, emit_data, target, true);
+               if (target == TGSI_TEXTURE_BUFFER) {
+                       rsrc = extract_rsrc_top_half(ctx, rsrc);
+                       buffer_append_args(ctx, emit_data, rsrc, coords,
+                                          bld_base->uint_bld.zero, true);
+               } else {
+                       emit_data->args[emit_data->arg_count++] = coords;
+                       emit_data->args[emit_data->arg_count++] = rsrc;
+
+                       image_append_args(ctx, emit_data, target, true);
+               }
        }
 }
 
@@ -3169,11 +3200,11 @@ static void atomic_emit(
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        const struct tgsi_full_instruction * inst = emit_data->inst;
-       unsigned target = inst->Memory.Texture;
        char intrinsic_name[40];
        LLVMValueRef tmp;
 
-       if (target == TGSI_TEXTURE_BUFFER) {
+       if (inst->Src[0].Register.File == TGSI_FILE_BUFFER ||
+           inst->Memory.Texture == TGSI_TEXTURE_BUFFER) {
                snprintf(intrinsic_name, sizeof(intrinsic_name),
                         "llvm.amdgcn.buffer.atomic.%s", action->intr_name);
        } else {
-- 
2.5.0

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