diff options
Diffstat (limited to 'src/gallium/drivers')
| -rw-r--r-- | src/gallium/drivers/radeonsi/si_shader.c | 62 |
1 files changed, 37 insertions, 25 deletions
diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c index 091560d279e..5a40c5ee91d 100644 --- a/src/gallium/drivers/radeonsi/si_shader.c +++ b/src/gallium/drivers/radeonsi/si_shader.c @@ -2265,11 +2265,13 @@ static void emit_streamout_output(struct si_shader_context *ctx, stream_out->dst_offset * 4); } -/* On SI, the vertex shader is responsible for writing streamout data - * to buffers. */ +/** + * Write streamout data to buffers for vertex stream @p stream (different + * vertex streams can occur for GS copy shaders). + */ static void si_llvm_emit_streamout(struct si_shader_context *ctx, struct si_shader_output_values *outputs, - unsigned noutput) + unsigned noutput, unsigned stream) { struct si_shader_selector *sel = ctx->shader->selector; struct pipe_stream_output_info *so = &sel->so; @@ -2288,27 +2290,11 @@ static void si_llvm_emit_streamout(struct si_shader_context *ctx, LLVMValueRef can_emit = LLVMBuildICmp(builder, LLVMIntULT, tid, so_vtx_count, ""); - LLVMValueRef stream_id = - unpack_param(ctx, ctx->param_streamout_config, 24, 2); - /* Emit the streamout code conditionally. This actually avoids * out-of-bounds buffer access. The hw tells us via the SGPR * (so_vtx_count) which threads are allowed to emit streamout data. */ lp_build_if(&if_ctx, gallivm, can_emit); - - for (int stream = 0; stream < 4; ++stream) { - struct lp_build_if_state if_ctx_stream; - - if (!sel->info.num_stream_output_components[stream]) - continue; - - LLVMValueRef is_stream = - LLVMBuildICmp(builder, LLVMIntEQ, - stream_id, - lp_build_const_int32(gallivm, stream), ""); - - lp_build_if(&if_ctx_stream, gallivm, is_stream); - + { /* The buffer offset is computed as follows: * ByteOffset = streamout_offset[buffer_id]*4 + * (streamout_write_index + thread_id)*stride[buffer_id] + @@ -2360,8 +2346,6 @@ static void si_llvm_emit_streamout(struct si_shader_context *ctx, emit_streamout_output(ctx, so_buffers, so_write_offset, &so->output[i], &outputs[reg]); } - - lp_build_endif(&if_ctx_stream); } lp_build_endif(&if_ctx); } @@ -2932,7 +2916,7 @@ static void si_llvm_emit_vs_epilogue(struct lp_build_tgsi_context *bld_base) VS_EPILOG_PRIMID_LOC, ""); if (ctx->shader->selector->so.num_outputs) - si_llvm_emit_streamout(ctx, outputs, i); + si_llvm_emit_streamout(ctx, outputs, i, 0); si_llvm_export_vs(bld_base, outputs, i); FREE(outputs); } @@ -6354,6 +6338,7 @@ si_generate_gs_copy_shader(struct si_screen *sscreen, struct si_shader_context ctx; struct si_shader *shader; struct gallivm_state *gallivm = &ctx.gallivm; + LLVMBuilderRef builder; struct lp_build_tgsi_context *bld_base = &ctx.soa.bld_base; struct lp_build_context *uint = &bld_base->uint_bld; struct si_shader_output_values *outputs; @@ -6379,6 +6364,8 @@ si_generate_gs_copy_shader(struct si_screen *sscreen, si_init_shader_ctx(&ctx, sscreen, shader, tm); ctx.type = PIPE_SHADER_VERTEX; + builder = gallivm->builder; + create_meta_data(&ctx); create_function(&ctx); preload_ring_buffers(&ctx); @@ -6395,6 +6382,14 @@ si_generate_gs_copy_shader(struct si_screen *sscreen, args[7] = uint->one; /* SLC */ args[8] = uint->zero; /* TFE */ + /* Fetch the vertex stream ID.*/ + LLVMValueRef stream_id; + + if (gs_selector->so.num_outputs) + stream_id = unpack_param(&ctx, ctx.param_streamout_config, 24, 2); + else + stream_id = uint->zero; + /* Fetch vertex data from GSVS ring */ for (i = 0; i < gsinfo->num_outputs; ++i) { unsigned chan; @@ -6420,8 +6415,25 @@ si_generate_gs_copy_shader(struct si_screen *sscreen, } } - if (gs_selector->so.num_outputs) - si_llvm_emit_streamout(&ctx, outputs, gsinfo->num_outputs); + if (gs_selector->so.num_outputs) { + for (int stream = 0; stream < 4; stream++) { + struct lp_build_if_state if_ctx_stream; + + if (!gsinfo->num_stream_output_components[stream]) + continue; + + LLVMValueRef is_stream = + LLVMBuildICmp(builder, LLVMIntEQ, + stream_id, + lp_build_const_int32(gallivm, stream), ""); + + lp_build_if(&if_ctx_stream, gallivm, is_stream); + si_llvm_emit_streamout(&ctx, outputs, + gsinfo->num_outputs, + stream); + lp_build_endif(&if_ctx_stream); + } + } si_llvm_export_vs(bld_base, outputs, gsinfo->num_outputs); LLVMBuildRetVoid(gallivm->builder); |