/* * Copyright 2020 Advanced Micro Devices, Inc. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * on the rights to use, copy, modify, merge, publish, distribute, sub * license, and/or sell copies of the Software, and to permit persons to whom * the Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE * USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include "si_pipe.h" #include "si_shader_internal.h" #include "sid.h" #include "util/u_memory.h" LLVMValueRef si_is_es_thread(struct si_shader_context *ctx) { /* Return true if the current thread should execute an ES thread. */ return LLVMBuildICmp(ctx->ac.builder, LLVMIntULT, ac_get_thread_id(&ctx->ac), si_unpack_param(ctx, ctx->args.merged_wave_info, 0, 8), ""); } LLVMValueRef si_is_gs_thread(struct si_shader_context *ctx) { /* Return true if the current thread should execute a GS thread. */ return LLVMBuildICmp(ctx->ac.builder, LLVMIntULT, ac_get_thread_id(&ctx->ac), si_unpack_param(ctx, ctx->args.merged_wave_info, 8, 8), ""); } static LLVMValueRef si_llvm_load_input_gs(struct ac_shader_abi *abi, unsigned input_index, unsigned vtx_offset_param, LLVMTypeRef type, unsigned swizzle) { struct si_shader_context *ctx = si_shader_context_from_abi(abi); struct si_shader *shader = ctx->shader; LLVMValueRef vtx_offset, soffset; struct si_shader_info *info = &shader->selector->info; unsigned param; LLVMValueRef value; param = si_shader_io_get_unique_index(info->input[input_index].semantic, false); /* GFX9 has the ESGS ring in LDS. */ if (ctx->screen->info.chip_class >= GFX9) { unsigned index = vtx_offset_param; vtx_offset = si_unpack_param(ctx, ctx->args.gs_vtx_offset[index / 2], (index & 1) * 16, 16); unsigned offset = param * 4 + swizzle; vtx_offset = LLVMBuildAdd(ctx->ac.builder, vtx_offset, LLVMConstInt(ctx->ac.i32, offset, false), ""); LLVMValueRef ptr = ac_build_gep0(&ctx->ac, ctx->esgs_ring, vtx_offset); LLVMValueRef value = LLVMBuildLoad(ctx->ac.builder, ptr, ""); return LLVMBuildBitCast(ctx->ac.builder, value, type, ""); } /* GFX6: input load from the ESGS ring in memory. */ /* Get the vertex offset parameter on GFX6. */ LLVMValueRef gs_vtx_offset = ac_get_arg(&ctx->ac, ctx->args.gs_vtx_offset[vtx_offset_param]); vtx_offset = LLVMBuildMul(ctx->ac.builder, gs_vtx_offset, LLVMConstInt(ctx->ac.i32, 4, 0), ""); soffset = LLVMConstInt(ctx->ac.i32, (param * 4 + swizzle) * 256, 0); value = ac_build_buffer_load(&ctx->ac, ctx->esgs_ring, 1, ctx->ac.i32_0, vtx_offset, soffset, 0, ctx->ac.f32, ac_glc, true, false); return LLVMBuildBitCast(ctx->ac.builder, value, type, ""); } static LLVMValueRef si_nir_load_input_gs(struct ac_shader_abi *abi, unsigned driver_location, unsigned component, unsigned num_components, unsigned vertex_index, LLVMTypeRef type) { struct si_shader_context *ctx = si_shader_context_from_abi(abi); LLVMValueRef value[4]; for (unsigned i = component; i < component + num_components; i++) { value[i] = si_llvm_load_input_gs(&ctx->abi, driver_location, vertex_index, type, i); } return ac_build_varying_gather_values(&ctx->ac, value, num_components, component); } /* Pass GS inputs from ES to GS on GFX9. */ static void si_set_es_return_value_for_gs(struct si_shader_context *ctx) { if (!ctx->shader->is_monolithic) ac_build_endif(&ctx->ac, ctx->merged_wrap_if_label); LLVMValueRef ret = ctx->return_value; ret = si_insert_input_ptr(ctx, ret, ctx->other_const_and_shader_buffers, 0); ret = si_insert_input_ptr(ctx, ret, ctx->other_samplers_and_images, 1); if (ctx->shader->key.as_ngg) ret = si_insert_input_ptr(ctx, ret, ctx->args.gs_tg_info, 2); else ret = si_insert_input_ret(ctx, ret, ctx->args.gs2vs_offset, 2); ret = si_insert_input_ret(ctx, ret, ctx->args.merged_wave_info, 3); ret = si_insert_input_ret(ctx, ret, ctx->args.scratch_offset, 5); ret = si_insert_input_ptr(ctx, ret, ctx->internal_bindings, 8 + SI_SGPR_INTERNAL_BINDINGS); ret = si_insert_input_ptr(ctx, ret, ctx->bindless_samplers_and_images, 8 + SI_SGPR_BINDLESS_SAMPLERS_AND_IMAGES); if (ctx->screen->use_ngg) { ret = si_insert_input_ptr(ctx, ret, ctx->vs_state_bits, 8 + SI_SGPR_VS_STATE_BITS); } unsigned vgpr = 8 + SI_NUM_VS_STATE_RESOURCE_SGPRS; ret = si_insert_input_ret_float(ctx, ret, ctx->args.gs_vtx_offset[0], vgpr++); ret = si_insert_input_ret_float(ctx, ret, ctx->args.gs_vtx_offset[1], vgpr++); ret = si_insert_input_ret_float(ctx, ret, ctx->args.gs_prim_id, vgpr++); ret = si_insert_input_ret_float(ctx, ret, ctx->args.gs_invocation_id, vgpr++); ret = si_insert_input_ret_float(ctx, ret, ctx->args.gs_vtx_offset[2], vgpr++); ctx->return_value = ret; } void si_llvm_emit_es_epilogue(struct ac_shader_abi *abi) { struct si_shader_context *ctx = si_shader_context_from_abi(abi); struct si_shader *es = ctx->shader; struct si_shader_info *info = &es->selector->info; LLVMValueRef *addrs = abi->outputs; LLVMValueRef lds_base = NULL; unsigned chan; int i; if (ctx->screen->info.chip_class >= GFX9 && info->num_outputs) { unsigned itemsize_dw = es->selector->esgs_itemsize / 4; LLVMValueRef vertex_idx = ac_get_thread_id(&ctx->ac); LLVMValueRef wave_idx = si_unpack_param(ctx, ctx->args.merged_wave_info, 24, 4); vertex_idx = LLVMBuildOr(ctx->ac.builder, vertex_idx, LLVMBuildMul(ctx->ac.builder, wave_idx, LLVMConstInt(ctx->ac.i32, ctx->ac.wave_size, false), ""), ""); lds_base = LLVMBuildMul(ctx->ac.builder, vertex_idx, LLVMConstInt(ctx->ac.i32, itemsize_dw, 0), ""); } for (i = 0; i < info->num_outputs; i++) { int param; if (info->output_semantic[i] == VARYING_SLOT_VIEWPORT || info->output_semantic[i] == VARYING_SLOT_LAYER) continue; param = si_shader_io_get_unique_index(info->output_semantic[i], false); for (chan = 0; chan < 4; chan++) { if (!(info->output_usagemask[i] & (1 << chan))) continue; LLVMValueRef out_val = LLVMBuildLoad(ctx->ac.builder, addrs[4 * i + chan], ""); out_val = ac_to_integer(&ctx->ac, out_val); /* GFX9 has the ESGS ring in LDS. */ if (ctx->screen->info.chip_class >= GFX9) { LLVMValueRef idx = LLVMConstInt(ctx->ac.i32, param * 4 + chan, false); idx = LLVMBuildAdd(ctx->ac.builder, lds_base, idx, ""); ac_build_indexed_store(&ctx->ac, ctx->esgs_ring, idx, out_val); continue; } ac_build_buffer_store_dword(&ctx->ac, ctx->esgs_ring, out_val, 1, NULL, ac_get_arg(&ctx->ac, ctx->args.es2gs_offset), (4 * param + chan) * 4, ac_glc | ac_slc | ac_swizzled); } } if (ctx->screen->info.chip_class >= GFX9) si_set_es_return_value_for_gs(ctx); } static LLVMValueRef si_get_gs_wave_id(struct si_shader_context *ctx) { if (ctx->screen->info.chip_class >= GFX9) return si_unpack_param(ctx, ctx->args.merged_wave_info, 16, 8); else return ac_get_arg(&ctx->ac, ctx->args.gs_wave_id); } static void emit_gs_epilogue(struct si_shader_context *ctx) { if (ctx->shader->key.as_ngg) { gfx10_ngg_gs_emit_epilogue(ctx); return; } if (ctx->screen->info.chip_class >= GFX10) LLVMBuildFence(ctx->ac.builder, LLVMAtomicOrderingRelease, false, ""); ac_build_sendmsg(&ctx->ac, AC_SENDMSG_GS_OP_NOP | AC_SENDMSG_GS_DONE, si_get_gs_wave_id(ctx)); if (ctx->screen->info.chip_class >= GFX9) ac_build_endif(&ctx->ac, ctx->merged_wrap_if_label); } static void si_llvm_emit_gs_epilogue(struct ac_shader_abi *abi) { struct si_shader_context *ctx = si_shader_context_from_abi(abi); struct si_shader_info UNUSED *info = &ctx->shader->selector->info; assert(info->num_outputs <= AC_LLVM_MAX_OUTPUTS); emit_gs_epilogue(ctx); } /* Emit one vertex from the geometry shader */ static void si_llvm_emit_vertex(struct ac_shader_abi *abi, unsigned stream, LLVMValueRef *addrs) { struct si_shader_context *ctx = si_shader_context_from_abi(abi); if (ctx->shader->key.as_ngg) { gfx10_ngg_gs_emit_vertex(ctx, stream, addrs); return; } struct si_shader_info *info = &ctx->shader->selector->info; struct si_shader *shader = ctx->shader; LLVMValueRef soffset = ac_get_arg(&ctx->ac, ctx->args.gs2vs_offset); LLVMValueRef gs_next_vertex; LLVMValueRef can_emit; unsigned chan, offset; int i; /* Write vertex attribute values to GSVS ring */ gs_next_vertex = LLVMBuildLoad(ctx->ac.builder, ctx->gs_next_vertex[stream], ""); /* If this thread has already emitted the declared maximum number of * vertices, skip the write: excessive vertex emissions are not * supposed to have any effect. * * If the shader has no writes to memory, kill it instead. This skips * further memory loads and may allow LLVM to skip to the end * altogether. */ can_emit = LLVMBuildICmp(ctx->ac.builder, LLVMIntULT, gs_next_vertex, LLVMConstInt(ctx->ac.i32, shader->selector->info.base.gs.vertices_out, 0), ""); bool use_kill = !info->base.writes_memory; if (use_kill) { ac_build_kill_if_false(&ctx->ac, can_emit); } else { ac_build_ifcc(&ctx->ac, can_emit, 6505); } offset = 0; for (i = 0; i < info->num_outputs; i++) { for (chan = 0; chan < 4; chan++) { if (!(info->output_usagemask[i] & (1 << chan)) || ((info->output_streams[i] >> (2 * chan)) & 3) != stream) continue; LLVMValueRef out_val = LLVMBuildLoad(ctx->ac.builder, addrs[4 * i + chan], ""); LLVMValueRef voffset = LLVMConstInt(ctx->ac.i32, offset * shader->selector->info.base.gs.vertices_out, 0); offset++; voffset = LLVMBuildAdd(ctx->ac.builder, voffset, gs_next_vertex, ""); voffset = LLVMBuildMul(ctx->ac.builder, voffset, LLVMConstInt(ctx->ac.i32, 4, 0), ""); out_val = ac_to_integer(&ctx->ac, out_val); ac_build_buffer_store_dword(&ctx->ac, ctx->gsvs_ring[stream], out_val, 1, voffset, soffset, 0, ac_glc | ac_slc | ac_swizzled); } } gs_next_vertex = LLVMBuildAdd(ctx->ac.builder, gs_next_vertex, ctx->ac.i32_1, ""); LLVMBuildStore(ctx->ac.builder, gs_next_vertex, ctx->gs_next_vertex[stream]); /* Signal vertex emission if vertex data was written. */ if (offset) { ac_build_sendmsg(&ctx->ac, AC_SENDMSG_GS_OP_EMIT | AC_SENDMSG_GS | (stream << 8), si_get_gs_wave_id(ctx)); } if (!use_kill) ac_build_endif(&ctx->ac, 6505); } /* Cut one primitive from the geometry shader */ static void si_llvm_emit_primitive(struct ac_shader_abi *abi, unsigned stream) { struct si_shader_context *ctx = si_shader_context_from_abi(abi); if (ctx->shader->key.as_ngg) { LLVMBuildStore(ctx->ac.builder, ctx->ac.i32_0, ctx->gs_curprim_verts[stream]); return; } /* Signal primitive cut */ ac_build_sendmsg(&ctx->ac, AC_SENDMSG_GS_OP_CUT | AC_SENDMSG_GS | (stream << 8), si_get_gs_wave_id(ctx)); } void si_preload_esgs_ring(struct si_shader_context *ctx) { if (ctx->screen->info.chip_class <= GFX8) { unsigned ring = ctx->stage == MESA_SHADER_GEOMETRY ? SI_GS_RING_ESGS : SI_ES_RING_ESGS; LLVMValueRef offset = LLVMConstInt(ctx->ac.i32, ring, 0); LLVMValueRef buf_ptr = ac_get_arg(&ctx->ac, ctx->internal_bindings); ctx->esgs_ring = ac_build_load_to_sgpr(&ctx->ac, buf_ptr, offset); } else { if (USE_LDS_SYMBOLS) { /* Declare the ESGS ring as an explicit LDS symbol. */ si_llvm_declare_esgs_ring(ctx); } else { ac_declare_lds_as_pointer(&ctx->ac); ctx->esgs_ring = ctx->ac.lds; } } } void si_preload_gs_rings(struct si_shader_context *ctx) { const struct si_shader_selector *sel = ctx->shader->selector; LLVMBuilderRef builder = ctx->ac.builder; LLVMValueRef offset = LLVMConstInt(ctx->ac.i32, SI_RING_GSVS, 0); LLVMValueRef buf_ptr = ac_get_arg(&ctx->ac, ctx->internal_bindings); LLVMValueRef base_ring = ac_build_load_to_sgpr(&ctx->ac, buf_ptr, offset); /* The conceptual layout of the GSVS ring is * v0c0 .. vLv0 v0c1 .. vLc1 .. * but the real memory layout is swizzled across * threads: * t0v0c0 .. t15v0c0 t0v1c0 .. t15v1c0 ... t15vLcL * t16v0c0 .. * Override the buffer descriptor accordingly. */ LLVMTypeRef v2i64 = LLVMVectorType(ctx->ac.i64, 2); uint64_t stream_offset = 0; for (unsigned stream = 0; stream < 4; ++stream) { unsigned num_components; unsigned stride; unsigned num_records; LLVMValueRef ring, tmp; num_components = sel->info.num_stream_output_components[stream]; if (!num_components) continue; stride = 4 * num_components * sel->info.base.gs.vertices_out; /* Limit on the stride field for <= GFX7. */ assert(stride < (1 << 14)); num_records = ctx->ac.wave_size; ring = LLVMBuildBitCast(builder, base_ring, v2i64, ""); tmp = LLVMBuildExtractElement(builder, ring, ctx->ac.i32_0, ""); tmp = LLVMBuildAdd(builder, tmp, LLVMConstInt(ctx->ac.i64, stream_offset, 0), ""); stream_offset += stride * ctx->ac.wave_size; ring = LLVMBuildInsertElement(builder, ring, tmp, ctx->ac.i32_0, ""); ring = LLVMBuildBitCast(builder, ring, ctx->ac.v4i32, ""); tmp = LLVMBuildExtractElement(builder, ring, ctx->ac.i32_1, ""); tmp = LLVMBuildOr( builder, tmp, LLVMConstInt(ctx->ac.i32, S_008F04_STRIDE(stride) | S_008F04_SWIZZLE_ENABLE(1), 0), ""); ring = LLVMBuildInsertElement(builder, ring, tmp, ctx->ac.i32_1, ""); ring = LLVMBuildInsertElement(builder, ring, LLVMConstInt(ctx->ac.i32, num_records, 0), LLVMConstInt(ctx->ac.i32, 2, 0), ""); uint32_t rsrc3 = S_008F0C_DST_SEL_X(V_008F0C_SQ_SEL_X) | S_008F0C_DST_SEL_Y(V_008F0C_SQ_SEL_Y) | S_008F0C_DST_SEL_Z(V_008F0C_SQ_SEL_Z) | S_008F0C_DST_SEL_W(V_008F0C_SQ_SEL_W) | S_008F0C_INDEX_STRIDE(1) | /* index_stride = 16 (elements) */ S_008F0C_ADD_TID_ENABLE(1); if (ctx->ac.chip_class >= GFX10) { rsrc3 |= S_008F0C_FORMAT(V_008F0C_GFX10_FORMAT_32_FLOAT) | S_008F0C_OOB_SELECT(V_008F0C_OOB_SELECT_DISABLED) | S_008F0C_RESOURCE_LEVEL(1); } else { rsrc3 |= S_008F0C_NUM_FORMAT(V_008F0C_BUF_NUM_FORMAT_FLOAT) | S_008F0C_DATA_FORMAT(V_008F0C_BUF_DATA_FORMAT_32) | S_008F0C_ELEMENT_SIZE(1); /* element_size = 4 (bytes) */ } ring = LLVMBuildInsertElement(builder, ring, LLVMConstInt(ctx->ac.i32, rsrc3, false), LLVMConstInt(ctx->ac.i32, 3, 0), ""); ctx->gsvs_ring[stream] = ring; } } /* Generate code for the hardware VS shader stage to go with a geometry shader */ struct si_shader *si_generate_gs_copy_shader(struct si_screen *sscreen, struct ac_llvm_compiler *compiler, struct si_shader_selector *gs_selector, struct pipe_debug_callback *debug) { struct si_shader_context ctx; struct si_shader *shader; LLVMBuilderRef builder; struct si_shader_output_values outputs[SI_MAX_VS_OUTPUTS]; struct si_shader_info *gsinfo = &gs_selector->info; int i; shader = CALLOC_STRUCT(si_shader); if (!shader) return NULL; /* We can leave the fence as permanently signaled because the GS copy * shader only becomes visible globally after it has been compiled. */ util_queue_fence_init(&shader->ready); shader->selector = gs_selector; shader->is_gs_copy_shader = true; si_llvm_context_init(&ctx, sscreen, compiler, si_get_wave_size(sscreen, MESA_SHADER_VERTEX, false, false)); ctx.shader = shader; ctx.stage = MESA_SHADER_VERTEX; builder = ctx.ac.builder; si_llvm_create_main_func(&ctx, false); LLVMValueRef buf_ptr = ac_get_arg(&ctx.ac, ctx.internal_bindings); ctx.gsvs_ring[0] = ac_build_load_to_sgpr(&ctx.ac, buf_ptr, LLVMConstInt(ctx.ac.i32, SI_RING_GSVS, 0)); LLVMValueRef voffset = LLVMBuildMul(ctx.ac.builder, ctx.abi.vertex_id, LLVMConstInt(ctx.ac.i32, 4, 0), ""); /* Fetch the vertex stream ID.*/ LLVMValueRef stream_id; if (!sscreen->use_ngg_streamout && gs_selector->so.num_outputs) stream_id = si_unpack_param(&ctx, ctx.args.streamout_config, 24, 2); else stream_id = ctx.ac.i32_0; /* Fill in output information. */ for (i = 0; i < gsinfo->num_outputs; ++i) { outputs[i].semantic = gsinfo->output_semantic[i]; for (int chan = 0; chan < 4; chan++) { outputs[i].vertex_stream[chan] = (gsinfo->output_streams[i] >> (2 * chan)) & 3; } } LLVMBasicBlockRef end_bb; LLVMValueRef switch_inst; end_bb = LLVMAppendBasicBlockInContext(ctx.ac.context, ctx.main_fn, "end"); switch_inst = LLVMBuildSwitch(builder, stream_id, end_bb, 4); for (int stream = 0; stream < 4; stream++) { LLVMBasicBlockRef bb; unsigned offset; if (!gsinfo->num_stream_output_components[stream]) continue; if (stream > 0 && !gs_selector->so.num_outputs) continue; bb = LLVMInsertBasicBlockInContext(ctx.ac.context, end_bb, "out"); LLVMAddCase(switch_inst, LLVMConstInt(ctx.ac.i32, stream, 0), bb); LLVMPositionBuilderAtEnd(builder, bb); /* Fetch vertex data from GSVS ring */ offset = 0; for (i = 0; i < gsinfo->num_outputs; ++i) { for (unsigned chan = 0; chan < 4; chan++) { if (!(gsinfo->output_usagemask[i] & (1 << chan)) || outputs[i].vertex_stream[chan] != stream) { outputs[i].values[chan] = LLVMGetUndef(ctx.ac.f32); continue; } LLVMValueRef soffset = LLVMConstInt(ctx.ac.i32, offset * gs_selector->info.base.gs.vertices_out * 16 * 4, 0); offset++; outputs[i].values[chan] = ac_build_buffer_load(&ctx.ac, ctx.gsvs_ring[0], 1, ctx.ac.i32_0, voffset, soffset, 0, ctx.ac.f32, ac_glc | ac_slc, true, false); } } /* Streamout and exports. */ if (!sscreen->use_ngg_streamout && gs_selector->so.num_outputs) { si_llvm_emit_streamout(&ctx, outputs, gsinfo->num_outputs, stream); } if (stream == 0) si_llvm_build_vs_exports(&ctx, outputs, gsinfo->num_outputs); LLVMBuildBr(builder, end_bb); } LLVMPositionBuilderAtEnd(builder, end_bb); LLVMBuildRetVoid(ctx.ac.builder); ctx.stage = MESA_SHADER_GEOMETRY; /* override for shader dumping */ si_llvm_optimize_module(&ctx); bool ok = false; if (si_compile_llvm(sscreen, &ctx.shader->binary, &ctx.shader->config, ctx.compiler, &ctx.ac, debug, MESA_SHADER_GEOMETRY, "GS Copy Shader", false)) { if (si_can_dump_shader(sscreen, MESA_SHADER_GEOMETRY)) fprintf(stderr, "GS Copy Shader:\n"); si_shader_dump(sscreen, ctx.shader, debug, stderr, true); if (!ctx.shader->config.scratch_bytes_per_wave) ok = si_shader_binary_upload(sscreen, ctx.shader, 0); else ok = true; } si_llvm_dispose(&ctx); if (!ok) { FREE(shader); shader = NULL; } else { si_fix_resource_usage(sscreen, shader); } return shader; } /** * Build the GS prolog function. Rotate the input vertices for triangle strips * with adjacency. */ void si_llvm_build_gs_prolog(struct si_shader_context *ctx, union si_shader_part_key *key) { unsigned num_sgprs, num_vgprs; LLVMBuilderRef builder = ctx->ac.builder; LLVMTypeRef returns[AC_MAX_ARGS]; LLVMValueRef func, ret; memset(&ctx->args, 0, sizeof(ctx->args)); if (ctx->screen->info.chip_class >= GFX9) { /* Other user SGPRs are not needed by GS. */ num_sgprs = 8 + SI_NUM_VS_STATE_RESOURCE_SGPRS; num_vgprs = 5; /* ES inputs are not needed by GS */ } else { num_sgprs = GFX6_GS_NUM_USER_SGPR + 2; num_vgprs = 8; } for (unsigned i = 0; i < num_sgprs; ++i) { ac_add_arg(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_INT, NULL); returns[i] = ctx->ac.i32; } for (unsigned i = 0; i < num_vgprs; ++i) { ac_add_arg(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_INT, NULL); returns[num_sgprs + i] = ctx->ac.f32; } /* Create the function. */ si_llvm_create_func(ctx, "gs_prolog", returns, num_sgprs + num_vgprs, 0); func = ctx->main_fn; /* Copy inputs to outputs. This should be no-op, as the registers match, * but it will prevent the compiler from overwriting them unintentionally. */ ret = ctx->return_value; for (unsigned i = 0; i < num_sgprs; i++) { LLVMValueRef p = LLVMGetParam(func, i); ret = LLVMBuildInsertValue(builder, ret, p, i, ""); } for (unsigned i = 0; i < num_vgprs; i++) { LLVMValueRef p = LLVMGetParam(func, num_sgprs + i); p = ac_to_float(&ctx->ac, p); ret = LLVMBuildInsertValue(builder, ret, p, num_sgprs + i, ""); } if (key->gs_prolog.states.tri_strip_adj_fix) { /* Remap the input vertices for every other primitive. */ const struct ac_arg gfx6_vtx_params[6] = { {.used = true, .arg_index = num_sgprs}, {.used = true, .arg_index = num_sgprs + 1}, {.used = true, .arg_index = num_sgprs + 3}, {.used = true, .arg_index = num_sgprs + 4}, {.used = true, .arg_index = num_sgprs + 5}, {.used = true, .arg_index = num_sgprs + 6}, }; const struct ac_arg gfx9_vtx_params[3] = { {.used = true, .arg_index = num_sgprs}, {.used = true, .arg_index = num_sgprs + 1}, {.used = true, .arg_index = num_sgprs + 4}, }; LLVMValueRef vtx_in[6], vtx_out[6]; LLVMValueRef prim_id, rotate; if (ctx->screen->info.chip_class >= GFX9) { for (unsigned i = 0; i < 3; i++) { vtx_in[i * 2] = si_unpack_param(ctx, gfx9_vtx_params[i], 0, 16); vtx_in[i * 2 + 1] = si_unpack_param(ctx, gfx9_vtx_params[i], 16, 16); } } else { for (unsigned i = 0; i < 6; i++) vtx_in[i] = ac_get_arg(&ctx->ac, gfx6_vtx_params[i]); } prim_id = LLVMGetParam(func, num_sgprs + 2); rotate = LLVMBuildTrunc(builder, prim_id, ctx->ac.i1, ""); for (unsigned i = 0; i < 6; ++i) { LLVMValueRef base, rotated; base = vtx_in[i]; rotated = vtx_in[(i + 4) % 6]; vtx_out[i] = LLVMBuildSelect(builder, rotate, rotated, base, ""); } if (ctx->screen->info.chip_class >= GFX9) { for (unsigned i = 0; i < 3; i++) { LLVMValueRef hi, out; hi = LLVMBuildShl(builder, vtx_out[i * 2 + 1], LLVMConstInt(ctx->ac.i32, 16, 0), ""); out = LLVMBuildOr(builder, vtx_out[i * 2], hi, ""); out = ac_to_float(&ctx->ac, out); ret = LLVMBuildInsertValue(builder, ret, out, gfx9_vtx_params[i].arg_index, ""); } } else { for (unsigned i = 0; i < 6; i++) { LLVMValueRef out; out = ac_to_float(&ctx->ac, vtx_out[i]); ret = LLVMBuildInsertValue(builder, ret, out, gfx6_vtx_params[i].arg_index, ""); } } } LLVMBuildRet(builder, ret); } void si_llvm_init_gs_callbacks(struct si_shader_context *ctx) { ctx->abi.load_inputs = si_nir_load_input_gs; ctx->abi.emit_vertex = si_llvm_emit_vertex; ctx->abi.emit_primitive = si_llvm_emit_primitive; ctx->abi.emit_outputs = si_llvm_emit_gs_epilogue; }