| 0,0 → 1,104 |
|---|
| /* |
| * 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 vc4_opt_small_immediates.c |
| * |
| * Turns references to small constant uniform values into small immediates |
| * fields. |
| */ |
| |
| #include "vc4_qir.h" |
| #include "vc4_qpu.h" |
| |
| static bool debug; |
| |
| bool |
| qir_opt_small_immediates(struct vc4_compile *c) |
| { |
| bool progress = false; |
| struct simple_node *node; |
| |
| foreach(node, &c->instructions) { |
| struct qinst *inst = (struct qinst *)node; |
| |
| /* The small immediate value sits in the raddr B field, so we |
| * can't have 2 small immediates in one instruction (unless |
| * they're the same value, but that should be optimized away |
| * elsewhere). |
| */ |
| bool uses_small_imm = false; |
| for (int i = 0; i < qir_get_op_nsrc(inst->op); i++) { |
| if (inst->src[i].file == QFILE_SMALL_IMM) |
| uses_small_imm = true; |
| } |
| if (uses_small_imm) |
| continue; |
| |
| for (int i = 0; i < qir_get_op_nsrc(inst->op); i++) { |
| struct qreg src = qir_follow_movs(c, inst->src[i]); |
| |
| if (src.file != QFILE_UNIF || |
| c->uniform_contents[src.index] != |
| QUNIFORM_CONSTANT) { |
| continue; |
| } |
| |
| if (i == 1 && |
| (inst->op == QOP_TEX_S || |
| inst->op == QOP_TEX_T || |
| inst->op == QOP_TEX_R || |
| inst->op == QOP_TEX_B)) { |
| /* No turning the implicit uniform read into |
| * an immediate. |
| */ |
| continue; |
| } |
| |
| if (qir_src_needs_a_file(inst)) |
| continue; |
| |
| uint32_t imm = c->uniform_data[src.index]; |
| uint32_t small_imm = qpu_encode_small_immediate(imm); |
| if (small_imm == ~0) |
| continue; |
| |
| if (debug) { |
| fprintf(stderr, "opt_small_immediate() from: "); |
| qir_dump_inst(c, inst); |
| fprintf(stderr, "\n"); |
| } |
| inst->src[i].file = QFILE_SMALL_IMM; |
| inst->src[i].index = imm; |
| if (debug) { |
| fprintf(stderr, "to: "); |
| qir_dump_inst(c, inst); |
| fprintf(stderr, "\n"); |
| } |
| progress = true; |
| break; |
| } |
| } |
| |
| return progress; |
| } |