From: Dave Airlie Date: Tue, 24 Mar 2020 21:57:33 +0000 (+1000) Subject: llvmpipe: add min samples support to the fragment shader. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=8a83db420401fd3a29cae7a8b6a49b67fd2ddf58;p=mesa.git llvmpipe: add min samples support to the fragment shader. This isn't enabled yet until the state gets hooked up Reviewed-by: Roland Scheidegger Part-of: --- diff --git a/src/gallium/drivers/llvmpipe/lp_state_fs.c b/src/gallium/drivers/llvmpipe/lp_state_fs.c index 53d6335bd51..2ce97260d2f 100644 --- a/src/gallium/drivers/llvmpipe/lp_state_fs.c +++ b/src/gallium/drivers/llvmpipe/lp_state_fs.c @@ -444,12 +444,17 @@ generate_fs_loop(struct gallivm_state *gallivm, memset(outputs, 0, sizeof outputs); + /* Allocate color storage for each fragment sample */ + LLVMValueRef color_store_size = num_loop; + if (key->min_samples > 1) + color_store_size = LLVMBuildMul(builder, num_loop, lp_build_const_int32(gallivm, key->min_samples), ""); + for(cbuf = 0; cbuf < key->nr_cbufs; cbuf++) { for(chan = 0; chan < TGSI_NUM_CHANNELS; ++chan) { out_color[cbuf][chan] = lp_build_array_alloca(gallivm, lp_build_vec_type(gallivm, type), - num_loop, "color"); + color_store_size, "color"); } } if (dual_source_blend) { @@ -458,7 +463,7 @@ generate_fs_loop(struct gallivm_state *gallivm, out_color[1][chan] = lp_build_array_alloca(gallivm, lp_build_vec_type(gallivm, type), - num_loop, "color1"); + color_store_size, "color1"); } } @@ -615,17 +620,40 @@ generate_fs_loop(struct gallivm_state *gallivm, tmp_s_mask_or = LLVMBuildLoad(builder, s_mask_or, ""); lp_build_mask_update(&mask, tmp_s_mask_or); - /* for multisample Z needs to be re interpolated at pixel center */ - lp_build_interp_soa_update_pos_dyn(interp, gallivm, loop_state.counter, NULL); + if (key->min_samples == 1) { + /* for multisample Z needs to be re interpolated at pixel center */ + lp_build_interp_soa_update_pos_dyn(interp, gallivm, loop_state.counter, NULL); + lp_build_mask_update(&mask, tmp_s_mask_or); + } } LLVMValueRef out_sample_mask_storage = NULL; if (shader->info.base.writes_samplemask) { out_sample_mask_storage = lp_build_alloca(gallivm, int_vec_type, "write_mask"); + if (key->min_samples > 1) + LLVMBuildStore(builder, LLVMConstNull(int_vec_type), out_sample_mask_storage); } + + if (key->multisample && key->min_samples > 1) { + lp_build_for_loop_begin(&sample_loop_state, gallivm, + lp_build_const_int32(gallivm, 0), + LLVMIntULT, + lp_build_const_int32(gallivm, key->min_samples), + lp_build_const_int32(gallivm, 1)); + + LLVMValueRef s_mask_idx = LLVMBuildMul(builder, sample_loop_state.counter, num_loop, ""); + s_mask_idx = LLVMBuildAdd(builder, s_mask_idx, loop_state.counter, ""); + s_mask_ptr = LLVMBuildGEP(builder, mask_store, &s_mask_idx, 1, ""); + s_mask = LLVMBuildLoad(builder, s_mask_ptr, ""); + lp_build_mask_force(&mask, s_mask); + lp_build_interp_soa_update_pos_dyn(interp, gallivm, loop_state.counter, sample_loop_state.counter); + system_values.sample_id = sample_loop_state.counter; + } else + system_values.sample_id = lp_build_const_int32(gallivm, 0); + system_values.sample_pos = sample_pos_array; - lp_build_interp_soa_update_inputs_dyn(interp, gallivm, loop_state.counter, mask_store, NULL); + lp_build_interp_soa_update_inputs_dyn(interp, gallivm, loop_state.counter, mask_store, system_values.sample_id); struct lp_build_tgsi_params params; memset(¶ms, 0, sizeof(params)); @@ -723,10 +751,19 @@ generate_fs_loop(struct gallivm_state *gallivm, output_smask = lp_build_cmp(&smask_bld, PIPE_FUNC_NOTEQUAL, output_smask, smask_bld.zero); lp_build_mask_update(&mask, output_smask); } + + if (key->min_samples > 1) { + /* only the bit corresponding to this sample is to be used. */ + LLVMValueRef tmp_mask = LLVMBuildLoad(builder, out_sample_mask_storage, "tmp_mask"); + LLVMValueRef out_smask_idx = LLVMBuildShl(builder, lp_build_const_int32(gallivm, 1), sample_loop_state.counter, ""); + LLVMValueRef smask_bit = LLVMBuildAnd(builder, output_smask, lp_build_broadcast(gallivm, int_vec_type, out_smask_idx), ""); + output_smask = LLVMBuildOr(builder, tmp_mask, smask_bit, ""); + } + LLVMBuildStore(builder, output_smask, out_sample_mask_storage); } - /* Color write */ + /* Color write - per fragment sample */ for (attrib = 0; attrib < shader->info.base.num_outputs; ++attrib) { unsigned cbuf = shader->info.base.output_semantic_index[attrib]; @@ -740,8 +777,12 @@ generate_fs_loop(struct gallivm_state *gallivm, */ LLVMValueRef out = LLVMBuildLoad(builder, outputs[attrib][chan], ""); LLVMValueRef color_ptr; + LLVMValueRef color_idx = loop_state.counter; + if (key->min_samples > 1) + color_idx = LLVMBuildAdd(builder, color_idx, + LLVMBuildMul(builder, sample_loop_state.counter, num_loop, ""), ""); color_ptr = LLVMBuildGEP(builder, out_color[cbuf][chan], - &loop_state.counter, 1, ""); + &color_idx, 1, ""); lp_build_name(out, "color%u.%c", attrib, "rgba"[chan]); LLVMBuildStore(builder, out, color_ptr); } @@ -749,6 +790,10 @@ generate_fs_loop(struct gallivm_state *gallivm, } } + if (key->multisample && key->min_samples > 1) { + LLVMBuildStore(builder, lp_build_mask_value(&mask), s_mask_ptr); + lp_build_for_loop_end(&sample_loop_state); + } if (key->multisample) { /* execute depth test for each sample */ @@ -764,7 +809,8 @@ generate_fs_loop(struct gallivm_state *gallivm, /* combine the execution mask post fragment shader with the coverage mask. */ s_mask = LLVMBuildLoad(builder, s_mask_ptr, ""); - s_mask = LLVMBuildAnd(builder, s_mask, lp_build_mask_value(&mask), ""); + if (key->min_samples == 1) + s_mask = LLVMBuildAnd(builder, s_mask, lp_build_mask_value(&mask), ""); /* if the shader writes sample mask use that */ if (shader->info.base.writes_samplemask) { @@ -2678,7 +2724,7 @@ generate_fragment(struct llvmpipe_context *lp, struct lp_build_image_soa *image; struct lp_build_interp_soa_context interp; LLVMValueRef fs_mask[(16 / 4) * LP_MAX_SAMPLES]; - LLVMValueRef fs_out_color[PIPE_MAX_COLOR_BUFS][TGSI_NUM_CHANNELS][16 / 4]; + LLVMValueRef fs_out_color[LP_MAX_SAMPLES][PIPE_MAX_COLOR_BUFS][TGSI_NUM_CHANNELS][16 / 4]; LLVMValueRef function; LLVMValueRef facing; unsigned num_fs; @@ -2943,7 +2989,6 @@ generate_fragment(struct llvmpipe_context *lp, thread_data_ptr); for (i = 0; i < num_fs; i++) { - LLVMValueRef indexi = lp_build_const_int32(gallivm, i); LLVMValueRef ptr; for (unsigned s = 0; s < key->coverage_samples; s++) { int idx = (i + (s * num_fs)); @@ -2953,22 +2998,26 @@ generate_fragment(struct llvmpipe_context *lp, fs_mask[idx] = LLVMBuildLoad(builder, ptr, "smask"); } - /* This is fucked up need to reorganize things */ - for (cbuf = 0; cbuf < key->nr_cbufs; cbuf++) { - for (chan = 0; chan < TGSI_NUM_CHANNELS; ++chan) { - ptr = LLVMBuildGEP(builder, - color_store[cbuf * !cbuf0_write_all][chan], - &indexi, 1, ""); - fs_out_color[cbuf][chan][i] = ptr; + for (unsigned s = 0; s < key->min_samples; s++) { + /* This is fucked up need to reorganize things */ + int idx = s * num_fs + i; + LLVMValueRef sindexi = lp_build_const_int32(gallivm, idx); + for (cbuf = 0; cbuf < key->nr_cbufs; cbuf++) { + for (chan = 0; chan < TGSI_NUM_CHANNELS; ++chan) { + ptr = LLVMBuildGEP(builder, + color_store[cbuf * !cbuf0_write_all][chan], + &sindexi, 1, ""); + fs_out_color[s][cbuf][chan][i] = ptr; + } } - } - if (dual_source_blend) { - /* only support one dual source blend target hence always use output 1 */ - for (chan = 0; chan < TGSI_NUM_CHANNELS; ++chan) { - ptr = LLVMBuildGEP(builder, - color_store[1][chan], - &indexi, 1, ""); - fs_out_color[1][chan][i] = ptr; + if (dual_source_blend) { + /* only support one dual source blend target hence always use output 1 */ + for (chan = 0; chan < TGSI_NUM_CHANNELS; ++chan) { + ptr = LLVMBuildGEP(builder, + color_store[1][chan], + &sindexi, 1, ""); + fs_out_color[s][1][chan][i] = ptr; + } } } } @@ -3006,6 +3055,7 @@ generate_fragment(struct llvmpipe_context *lp, for (unsigned s = 0; s < key->cbuf_nr_samples[cbuf]; s++) { unsigned mask_idx = num_fs * (key->multisample ? s : 0); + unsigned out_idx = key->min_samples == 1 ? 0 : s; LLVMValueRef out_ptr = color_ptr;; if (key->multisample) { @@ -3018,7 +3068,7 @@ generate_fragment(struct llvmpipe_context *lp, generate_unswizzled_blend(gallivm, cbuf, variant, key->cbuf_format[cbuf], - num_fs, fs_type, &fs_mask[mask_idx], fs_out_color, + num_fs, fs_type, &fs_mask[mask_idx], fs_out_color[out_idx], context_ptr, out_ptr, stride, partial_mask, do_branch); } @@ -3044,6 +3094,7 @@ dump_fs_variant_key(struct lp_fragment_shader_variant_key *key) if (key->multisample) { debug_printf("multisample = 1\n"); debug_printf("coverage samples = %d\n", key->coverage_samples); + debug_printf("min samples = %d\n", key->min_samples); } for (i = 0; i < key->nr_cbufs; ++i) { debug_printf("cbuf_format[%u] = %s\n", i, util_format_name(key->cbuf_format[i])); @@ -3669,8 +3720,11 @@ make_variant_key(struct llvmpipe_context *lp, } key->coverage_samples = 1; - if (key->multisample) + key->min_samples = 1; + if (key->multisample) { key->coverage_samples = util_framebuffer_get_num_samples(&lp->framebuffer); + key->min_samples = 1; + } key->nr_cbufs = lp->framebuffer.nr_cbufs; if (!key->blend.independent_blend_enable) { diff --git a/src/gallium/drivers/llvmpipe/lp_state_fs.h b/src/gallium/drivers/llvmpipe/lp_state_fs.h index 87bc7e3b035..555bacff4ec 100644 --- a/src/gallium/drivers/llvmpipe/lp_state_fs.h +++ b/src/gallium/drivers/llvmpipe/lp_state_fs.h @@ -91,6 +91,7 @@ struct lp_fragment_shader_variant_key uint8_t cbuf_nr_samples[PIPE_MAX_COLOR_BUFS]; uint8_t zsbuf_nr_samples; uint8_t coverage_samples; + uint8_t min_samples; struct lp_sampler_static_state samplers[1]; /* followed by variable number of images */