diff options
Diffstat (limited to 'lib/mesa/src/broadcom/compiler/vir_lower_uniforms.c')
| -rw-r--r-- | lib/mesa/src/broadcom/compiler/vir_lower_uniforms.c | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/lib/mesa/src/broadcom/compiler/vir_lower_uniforms.c b/lib/mesa/src/broadcom/compiler/vir_lower_uniforms.c deleted file mode 100644 index 7f3bb8460..000000000 --- a/lib/mesa/src/broadcom/compiler/vir_lower_uniforms.c +++ /dev/null @@ -1,209 +0,0 @@ -/* - * Copyright © 2014 Broadcom - * - * 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. - */ - -/** - * @file v3d_vir_lower_uniforms.c - * - * This is the pre-code-generation pass for fixing up instructions that try to - * read from multiple uniform values. - */ - -#include "v3d_compiler.h" -#include "util/hash_table.h" -#include "util/u_math.h" - -static inline uint32_t -index_hash(const void *key) -{ - return (uintptr_t)key; -} - -static inline bool -index_compare(const void *a, const void *b) -{ - return a == b; -} - -static void -add_uniform(struct hash_table *ht, struct qreg reg) -{ - struct hash_entry *entry; - void *key = (void *)(uintptr_t)(reg.index + 1); - - entry = _mesa_hash_table_search(ht, key); - if (entry) { - entry->data++; - } else { - _mesa_hash_table_insert(ht, key, (void *)(uintptr_t)1); - } -} - -static void -remove_uniform(struct hash_table *ht, struct qreg reg) -{ - struct hash_entry *entry; - void *key = (void *)(uintptr_t)(reg.index + 1); - - entry = _mesa_hash_table_search(ht, key); - assert(entry); - entry->data = (void *)(((uintptr_t) entry->data) - 1); - if (entry->data == NULL) - _mesa_hash_table_remove(ht, entry); -} - -static bool -is_lowerable_uniform(struct qinst *inst, int i) -{ - if (inst->src[i].file != QFILE_UNIF) - return false; - if (vir_has_implicit_uniform(inst)) - return i != vir_get_implicit_uniform_src(inst); - return true; -} - -/* Returns the number of different uniform values referenced by the - * instruction. - */ -static uint32_t -vir_get_instruction_uniform_count(struct qinst *inst) -{ - uint32_t count = 0; - - for (int i = 0; i < vir_get_nsrc(inst); i++) { - if (inst->src[i].file != QFILE_UNIF) - continue; - - bool is_duplicate = false; - for (int j = 0; j < i; j++) { - if (inst->src[j].file == QFILE_UNIF && - inst->src[j].index == inst->src[i].index) { - is_duplicate = true; - break; - } - } - if (!is_duplicate) - count++; - } - - return count; -} - -void -vir_lower_uniforms(struct v3d_compile *c) -{ - struct hash_table *ht = - _mesa_hash_table_create(c, index_hash, index_compare); - - /* Walk the instruction list, finding which instructions have more - * than one uniform referenced, and add those uniform values to the - * ht. - */ - vir_for_each_inst_inorder(inst, c) { - uint32_t nsrc = vir_get_nsrc(inst); - - if (vir_get_instruction_uniform_count(inst) <= 1) - continue; - - for (int i = 0; i < nsrc; i++) { - if (is_lowerable_uniform(inst, i)) - add_uniform(ht, inst->src[i]); - } - } - - while (ht->entries) { - /* Find the most commonly used uniform in instructions that - * need a uniform lowered. - */ - uint32_t max_count = 0; - uint32_t max_index = 0; - struct hash_entry *entry; - hash_table_foreach(ht, entry) { - uint32_t count = (uintptr_t)entry->data; - uint32_t index = (uintptr_t)entry->key - 1; - if (count > max_count) { - max_count = count; - max_index = index; - } - } - - struct qreg unif = vir_reg(QFILE_UNIF, max_index); - - /* Now, find the instructions using this uniform and make them - * reference a temp instead. - */ - vir_for_each_block(block, c) { - struct qinst *mov = NULL; - - vir_for_each_inst(inst, block) { - uint32_t nsrc = vir_get_nsrc(inst); - - uint32_t count = vir_get_instruction_uniform_count(inst); - - if (count <= 1) - continue; - - /* If the block doesn't have a load of the - * uniform yet, add it. We could potentially - * do better and CSE MOVs from multiple blocks - * into dominating blocks, except that may - * cause troubles for register allocation. - */ - if (!mov) { - mov = vir_mul_inst(V3D_QPU_M_MOV, - vir_get_temp(c), - unif, c->undef); - list_add(&mov->link, - &block->instructions); - c->defs[mov->dst.index] = mov; - } - - bool removed = false; - for (int i = 0; i < nsrc; i++) { - if (is_lowerable_uniform(inst, i) && - inst->src[i].index == max_index) { - inst->src[i].file = - mov->dst.file; - inst->src[i].index = - mov->dst.index; - remove_uniform(ht, unif); - removed = true; - } - } - if (removed) - count--; - - /* If the instruction doesn't need lowering any more, - * then drop it from the list. - */ - if (count <= 1) { - for (int i = 0; i < nsrc; i++) { - if (is_lowerable_uniform(inst, i)) - remove_uniform(ht, inst->src[i]); - } - } - } - } - } - - _mesa_hash_table_destroy(ht, NULL); -} |