radeonsi: Lower TGSI_OPCODE_STORE down to LLVM op

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index b73076f29e59459d0a93c9bafd38991853433780..a5ccb720d34db5a3207bb117b3c85bb80db177ff 100644 (file)
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -40,6 +40,7 @@
 #include "util/u_memory.h"
 #include "util/u_pstipple.h"
 #include "tgsi/tgsi_parse.h"
+#include "tgsi/tgsi_build.h"
 #include "tgsi/tgsi_util.h"
 #include "tgsi/tgsi_dump.h"
 
@@ -2763,7 +2764,8 @@ image_fetch_rsrc(
 
 static LLVMValueRef image_fetch_coords(
                struct lp_build_tgsi_context *bld_base,
-               const struct tgsi_full_instruction *inst)
+               const struct tgsi_full_instruction *inst,
+               unsigned src)
 {
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
@@ -2775,7 +2777,7 @@ static LLVMValueRef image_fetch_coords(
        int chan;
 
        for (chan = 0; chan < num_coords; ++chan) {
-               tmp = lp_build_emit_fetch(bld_base, inst, 1, chan);
+               tmp = lp_build_emit_fetch(bld_base, inst, src, chan);
                tmp = LLVMBuildBitCast(builder, tmp, bld_base->uint_bld.elem_type, "");
                coords[chan] = tmp;
        }
@@ -2852,7 +2854,7 @@ static void load_fetch_args(
        emit_data->dst_type = LLVMVectorType(bld_base->base.elem_type, 4);
 
        image_fetch_rsrc(bld_base, &inst->Src[0], &rsrc);
-       coords = image_fetch_coords(bld_base, inst);
+       coords = image_fetch_coords(bld_base, inst, 1);
 
        if (target == TGSI_TEXTURE_BUFFER) {
                buffer_append_args(ctx, emit_data, rsrc, coords);
@@ -2898,6 +2900,79 @@ static void load_emit(
        }
 }
 
+static void store_fetch_args(
+               struct lp_build_tgsi_context * bld_base,
+               struct lp_build_emit_data * emit_data)
+{
+       struct si_shader_context *ctx = si_shader_context(bld_base);
+       struct gallivm_state *gallivm = bld_base->base.gallivm;
+       const struct tgsi_full_instruction * inst = emit_data->inst;
+       struct tgsi_full_src_register image;
+       unsigned target = inst->Memory.Texture;
+       LLVMValueRef chans[4];
+       LLVMValueRef data;
+       LLVMValueRef coords;
+       LLVMValueRef rsrc;
+       unsigned chan;
+
+       emit_data->dst_type = LLVMVoidTypeInContext(gallivm->context);
+
+       image = tgsi_full_src_register_from_dst(&inst->Dst[0]);
+       image_fetch_rsrc(bld_base, &image, &rsrc);
+       coords = image_fetch_coords(bld_base, inst, 0);
+
+       for (chan = 0; chan < 4; ++chan) {
+               chans[chan] = lp_build_emit_fetch(bld_base, inst, 1, chan);
+       }
+       data = lp_build_gather_values(gallivm, chans, 4);
+
+       if (target == TGSI_TEXTURE_BUFFER) {
+               emit_data->args[0] = data;
+               emit_data->arg_count = 1;
+
+               buffer_append_args(ctx, emit_data, rsrc, coords);
+       } else {
+               emit_data->args[0] = data;
+               emit_data->args[1] = coords;
+               emit_data->args[2] = rsrc;
+               emit_data->args[3] = lp_build_const_int32(gallivm, 15); /* dmask */
+               emit_data->arg_count = 4;
+
+               image_append_args(ctx, emit_data, target);
+       }
+}
+
+static void store_emit(
+               const struct lp_build_tgsi_action *action,
+               struct lp_build_tgsi_context *bld_base,
+               struct lp_build_emit_data *emit_data)
+{
+       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[32];
+       char coords_type[8];
+
+       if (target == TGSI_TEXTURE_BUFFER) {
+               emit_data->output[emit_data->chan] = lp_build_intrinsic(
+                       builder, "llvm.amdgcn.buffer.store.format.v4f32",
+                       emit_data->dst_type, emit_data->args, emit_data->arg_count,
+                       LLVMNoUnwindAttribute);
+       } else {
+               build_int_type_name(LLVMTypeOf(emit_data->args[1]),
+                                   coords_type, sizeof(coords_type));
+               snprintf(intrinsic_name, sizeof(intrinsic_name),
+                        "llvm.amdgcn.image.store.%s", coords_type);
+
+               emit_data->output[emit_data->chan] =
+                       lp_build_intrinsic(
+                               builder, intrinsic_name, emit_data->dst_type,
+                               emit_data->args, emit_data->arg_count,
+                               LLVMNoUnwindAttribute);
+       }
+}
+
 static void resq_fetch_args(
                struct lp_build_tgsi_context * bld_base,
                struct lp_build_emit_data * emit_data)
@@ -5130,6 +5205,8 @@ static void si_init_shader_ctx(struct si_shader_context *ctx,
 
        bld_base->op_actions[TGSI_OPCODE_LOAD].fetch_args = load_fetch_args;
        bld_base->op_actions[TGSI_OPCODE_LOAD].emit = load_emit;
+       bld_base->op_actions[TGSI_OPCODE_STORE].fetch_args = store_fetch_args;
+       bld_base->op_actions[TGSI_OPCODE_STORE].emit = store_emit;
        bld_base->op_actions[TGSI_OPCODE_RESQ].fetch_args = resq_fetch_args;
        bld_base->op_actions[TGSI_OPCODE_RESQ].emit = resq_emit;