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| 5564 | serge | 1 | /* |
| 2 | * Copyright © 2014 Broadcom |
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| 3 | * |
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| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 5 | * copy of this software and associated documentation files (the "Software"), |
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| 6 | * to deal in the Software without restriction, including without limitation |
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| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 9 | * Software is furnished to do so, subject to the following conditions: |
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| 10 | * |
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| 11 | * The above copyright notice and this permission notice (including the next |
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| 12 | * paragraph) shall be included in all copies or substantial portions of the |
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| 13 | * Software. |
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| 14 | * |
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| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
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| 21 | * IN THE SOFTWARE. |
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| 22 | */ |
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| 23 | |||
| 24 | /** |
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| 25 | * @file vc4_reorder_uniforms.c |
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| 26 | * |
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| 27 | * After optimization has occurred, rewrites the shader to have uniform reads |
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| 28 | * reading from the c->uniform_contents[] in order, exactly once each. |
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| 29 | * |
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| 30 | * This allows optimization and instruction scheduling to move things around |
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| 31 | * without worrying about how the hardware has the "each uniform read bumps |
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| 32 | * the uniform read address" property. |
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| 33 | */ |
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| 34 | |||
| 35 | #include "util/ralloc.h" |
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| 36 | #include "util/u_math.h" |
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| 37 | #include "vc4_qir.h" |
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| 38 | |||
| 39 | void |
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| 40 | qir_reorder_uniforms(struct vc4_compile *c) |
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| 41 | { |
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| 42 | uint32_t *uniform_index = NULL; |
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| 43 | uint32_t uniform_index_size = 0; |
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| 44 | uint32_t next_uniform = 0; |
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| 45 | struct simple_node *node; |
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| 46 | foreach(node, &c->instructions) { |
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| 47 | struct qinst *inst = (struct qinst *)node; |
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| 48 | |||
| 49 | for (int i = 0; i < qir_get_op_nsrc(inst->op); i++) { |
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| 50 | if (inst->src[i].file != QFILE_UNIF) |
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| 51 | continue; |
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| 52 | |||
| 53 | uint32_t new = next_uniform++; |
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| 54 | if (uniform_index_size <= new) { |
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| 55 | uniform_index_size = |
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| 56 | MAX2(uniform_index_size * 2, 16); |
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| 57 | uniform_index = |
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| 58 | realloc(uniform_index, |
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| 59 | uniform_index_size * |
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| 60 | sizeof(uint32_t)); |
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| 61 | } |
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| 62 | |||
| 63 | uniform_index[new] = inst->src[i].index; |
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| 64 | inst->src[i].index = new; |
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| 65 | } |
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| 66 | } |
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| 67 | |||
| 68 | uint32_t *uniform_data = ralloc_array(c, uint32_t, next_uniform); |
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| 69 | enum quniform_contents *uniform_contents = |
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| 70 | ralloc_array(c, enum quniform_contents, next_uniform); |
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| 71 | |||
| 72 | for (uint32_t i = 0; i < next_uniform; i++) { |
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| 73 | uniform_data[i] = c->uniform_data[uniform_index[i]]; |
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| 74 | uniform_contents[i] = c->uniform_contents[uniform_index[i]]; |
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| 75 | } |
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| 76 | |||
| 77 | ralloc_free(c->uniform_data); |
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| 78 | c->uniform_data = uniform_data; |
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| 79 | ralloc_free(c->uniform_contents); |
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| 80 | c->uniform_contents = uniform_contents; |
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| 81 | c->num_uniforms = next_uniform; |
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| 82 | |||
| 83 | free(uniform_index); |
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| 84 | } |