radeonsi/gfx9: store ES outputs to LDS

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index ab6e125607f5ab0c9c25cdc3fe7d24c1598fcd14..4899837abfe202162f56169fd2d82720f876cd03 100644 (file)
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -2840,28 +2840,41 @@ static void si_llvm_emit_es_epilogue(struct lp_build_tgsi_context *bld_base)
        struct tgsi_shader_info *info = &es->selector->info;
        LLVMValueRef soffset = LLVMGetParam(ctx->main_fn,
                                            ctx->param_es2gs_offset);
+       LLVMValueRef lds_base = NULL;
        unsigned chan;
        int i;
 
+       if (ctx->screen->b.chip_class >= GFX9 && info->num_outputs) {
+               unsigned itemsize_dw = es->selector->esgs_itemsize / 4;
+               lds_base = LLVMBuildMul(gallivm->builder, ac_get_thread_id(&ctx->ac),
+                                       LLVMConstInt(ctx->i32, itemsize_dw, 0), "");
+       }
+
        for (i = 0; i < info->num_outputs; i++) {
                LLVMValueRef *out_ptr = ctx->outputs[i];
-               int param_index;
+               int param;
 
                if (info->output_semantic_name[i] == TGSI_SEMANTIC_VIEWPORT_INDEX ||
                    info->output_semantic_name[i] == TGSI_SEMANTIC_LAYER)
                        continue;
 
-               param_index = si_shader_io_get_unique_index(info->output_semantic_name[i],
-                                                           info->output_semantic_index[i]);
+               param = si_shader_io_get_unique_index(info->output_semantic_name[i],
+                                                     info->output_semantic_index[i]);
 
                for (chan = 0; chan < 4; chan++) {
                        LLVMValueRef out_val = LLVMBuildLoad(gallivm->builder, out_ptr[chan], "");
                        out_val = LLVMBuildBitCast(gallivm->builder, out_val, ctx->i32, "");
 
+                       /* GFX9 has the ESGS ring in LDS. */
+                       if (ctx->screen->b.chip_class >= GFX9) {
+                               lds_store(bld_base, param * 4 + chan, lds_base, out_val);
+                               continue;
+                       }
+
                        ac_build_buffer_store_dword(&ctx->ac,
                                                    ctx->esgs_ring,
                                                    out_val, 1, NULL, soffset,
-                                                   (4 * param_index + chan) * 4,
+                                                   (4 * param + chan) * 4,
                                                    1, 1, true, true);
                }
        }