/* * Copyright (C) 2015 Rob Clark * * 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 * the rights to use, copy, modify, merge, publish, distribute, sublicense, * 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 NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS 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. * * Authors: * Rob Clark */ #include "util/debug.h" #include "ir3_nir.h" #include "ir3_compiler.h" #include "ir3_shader.h" static const nir_shader_compiler_options options = { .lower_fpow = true, .lower_scmp = true, .lower_flrp32 = true, .lower_flrp64 = true, .lower_ffract = true, .lower_fmod32 = true, .lower_fmod64 = true, .lower_fdiv = true, .lower_ldexp = true, .fuse_ffma = true, .native_integers = true, .vertex_id_zero_based = true, .lower_extract_byte = true, .lower_extract_word = true, .lower_all_io_to_temps = true, .lower_helper_invocation = true, }; const nir_shader_compiler_options * ir3_get_compiler_options(struct ir3_compiler *compiler) { return &options; } /* for given shader key, are any steps handled in nir? */ bool ir3_key_lowers_nir(const struct ir3_shader_key *key) { return key->fsaturate_s | key->fsaturate_t | key->fsaturate_r | key->vsaturate_s | key->vsaturate_t | key->vsaturate_r | key->ucp_enables | key->color_two_side | key->fclamp_color | key->vclamp_color; } #define OPT(nir, pass, ...) ({ \ bool this_progress = false; \ NIR_PASS(this_progress, nir, pass, ##__VA_ARGS__); \ this_progress; \ }) #define OPT_V(nir, pass, ...) NIR_PASS_V(nir, pass, ##__VA_ARGS__) static void ir3_optimize_loop(nir_shader *s) { bool progress; do { progress = false; OPT_V(s, nir_lower_vars_to_ssa); progress |= OPT(s, nir_opt_copy_prop_vars); progress |= OPT(s, nir_opt_dead_write_vars); progress |= OPT(s, nir_lower_alu_to_scalar); progress |= OPT(s, nir_lower_phis_to_scalar); progress |= OPT(s, nir_copy_prop); progress |= OPT(s, nir_opt_dce); progress |= OPT(s, nir_opt_cse); static int gcm = -1; if (gcm == -1) gcm = env_var_as_unsigned("GCM", 0); if (gcm == 1) progress |= OPT(s, nir_opt_gcm, true); else if (gcm == 2) progress |= OPT(s, nir_opt_gcm, false); progress |= OPT(s, nir_opt_peephole_select, 16); progress |= OPT(s, nir_opt_intrinsics); progress |= OPT(s, nir_opt_algebraic); progress |= OPT(s, nir_opt_constant_folding); progress |= OPT(s, nir_opt_dead_cf); if (OPT(s, nir_opt_trivial_continues)) { progress |= true; /* If nir_opt_trivial_continues makes progress, then we need to clean * things up if we want any hope of nir_opt_if or nir_opt_loop_unroll * to make progress. */ OPT(s, nir_copy_prop); OPT(s, nir_opt_dce); } progress |= OPT(s, nir_opt_if); progress |= OPT(s, nir_opt_remove_phis); progress |= OPT(s, nir_opt_undef); } while (progress); } struct nir_shader * ir3_optimize_nir(struct ir3_shader *shader, nir_shader *s, const struct ir3_shader_key *key) { struct nir_lower_tex_options tex_options = { .lower_rect = 0, }; if (key) { switch (shader->type) { case MESA_SHADER_FRAGMENT: tex_options.saturate_s = key->fsaturate_s; tex_options.saturate_t = key->fsaturate_t; tex_options.saturate_r = key->fsaturate_r; break; case MESA_SHADER_VERTEX: tex_options.saturate_s = key->vsaturate_s; tex_options.saturate_t = key->vsaturate_t; tex_options.saturate_r = key->vsaturate_r; break; default: /* TODO */ break; } } if (shader->compiler->gpu_id >= 400) { /* a4xx seems to have *no* sam.p */ tex_options.lower_txp = ~0; /* lower all txp */ } else { /* a3xx just needs to avoid sam.p for 3d tex */ tex_options.lower_txp = (1 << GLSL_SAMPLER_DIM_3D); } if (ir3_shader_debug & IR3_DBG_DISASM) { debug_printf("----------------------\n"); nir_print_shader(s, stdout); debug_printf("----------------------\n"); } OPT_V(s, nir_opt_global_to_local); OPT_V(s, nir_lower_regs_to_ssa); if (key) { if (s->info.stage == MESA_SHADER_VERTEX) { OPT_V(s, nir_lower_clip_vs, key->ucp_enables, false); if (key->vclamp_color) OPT_V(s, nir_lower_clamp_color_outputs); } else if (s->info.stage == MESA_SHADER_FRAGMENT) { OPT_V(s, nir_lower_clip_fs, key->ucp_enables); if (key->fclamp_color) OPT_V(s, nir_lower_clamp_color_outputs); } if (key->color_two_side) { OPT_V(s, nir_lower_two_sided_color); } } else { /* only want to do this the first time (when key is null) * and not again on any potential 2nd variant lowering pass: */ OPT_V(s, ir3_nir_apply_trig_workarounds); } OPT_V(s, nir_lower_tex, &tex_options); OPT_V(s, nir_lower_load_const_to_scalar); if (shader->compiler->gpu_id < 500) OPT_V(s, ir3_nir_lower_tg4_to_tex); ir3_optimize_loop(s); /* do idiv lowering after first opt loop to give a chance for * divide by immed power-of-two to be caught first: */ if (OPT(s, nir_lower_idiv)) ir3_optimize_loop(s); OPT_V(s, nir_remove_dead_variables, nir_var_local); OPT_V(s, nir_move_load_const); if (ir3_shader_debug & IR3_DBG_DISASM) { debug_printf("----------------------\n"); nir_print_shader(s, stdout); debug_printf("----------------------\n"); } nir_sweep(s); return s; } void ir3_nir_scan_driver_consts(nir_shader *shader, struct ir3_driver_const_layout *layout) { nir_foreach_function(function, shader) { if (!function->impl) continue; nir_foreach_block(block, function->impl) { nir_foreach_instr(instr, block) { if (instr->type != nir_instr_type_intrinsic) continue; nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr); unsigned idx; switch (intr->intrinsic) { case nir_intrinsic_get_buffer_size: idx = nir_src_as_const_value(intr->src[0])->u32[0]; if (layout->ssbo_size.mask & (1 << idx)) break; layout->ssbo_size.mask |= (1 << idx); layout->ssbo_size.off[idx] = layout->ssbo_size.count; layout->ssbo_size.count += 1; /* one const per */ break; case nir_intrinsic_image_deref_atomic_add: case nir_intrinsic_image_deref_atomic_min: case nir_intrinsic_image_deref_atomic_max: case nir_intrinsic_image_deref_atomic_and: case nir_intrinsic_image_deref_atomic_or: case nir_intrinsic_image_deref_atomic_xor: case nir_intrinsic_image_deref_atomic_exchange: case nir_intrinsic_image_deref_atomic_comp_swap: case nir_intrinsic_image_deref_store: case nir_intrinsic_image_deref_size: idx = nir_intrinsic_get_var(intr, 0)->data.driver_location; if (layout->image_dims.mask & (1 << idx)) break; layout->image_dims.mask |= (1 << idx); layout->image_dims.off[idx] = layout->image_dims.count; layout->image_dims.count += 3; /* three const per */ break; default: break; } } } } }