Brian Paul | 9cb2d9d | 2015-08-07 15:21:10 -0600 | [diff] [blame] | 1 | /*/ |
| 2 | * Copyright 2013 VMware, Inc. All rights reserved. |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person |
| 5 | * obtaining a copy of this software and associated documentation |
| 6 | * files (the "Software"), to deal in the Software without |
| 7 | * restriction, including without limitation the rights to use, copy, |
| 8 | * modify, merge, publish, distribute, sublicense, and/or sell copies |
| 9 | * of the Software, and to permit persons to whom the Software is |
| 10 | * furnished to do so, subject to the following conditions: |
| 11 | * |
| 12 | * The above copyright notice and this permission notice shall be |
| 13 | * included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 16 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 17 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 18 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 19 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 20 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 21 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 22 | * SOFTWARE. |
| 23 | */ |
| 24 | |
| 25 | |
| 26 | #include "svga_context.h" |
| 27 | #include "svga_link.h" |
Charmaine Lee | 304b5a1 | 2016-06-03 14:24:19 -0700 | [diff] [blame] | 28 | #include "svga_debug.h" |
Brian Paul | 9cb2d9d | 2015-08-07 15:21:10 -0600 | [diff] [blame] | 29 | |
| 30 | #include "tgsi/tgsi_strings.h" |
| 31 | |
| 32 | |
| 33 | #define INVALID_INDEX 255 |
| 34 | |
| 35 | |
| 36 | /** |
| 37 | * Examine input and output shaders info to link outputs from the |
| 38 | * output shader to inputs from the input shader. |
| 39 | * Basically, we'll remap input shader's input slots to new numbers |
| 40 | * based on semantic name/index of the outputs from the output shader. |
| 41 | */ |
| 42 | void |
| 43 | svga_link_shaders(const struct tgsi_shader_info *outshader_info, |
| 44 | const struct tgsi_shader_info *inshader_info, |
| 45 | struct shader_linkage *linkage) |
| 46 | { |
| 47 | unsigned i, free_slot; |
| 48 | |
Brian Paul | e0184b3 | 2016-04-25 09:34:40 -0600 | [diff] [blame] | 49 | for (i = 0; i < ARRAY_SIZE(linkage->input_map); i++) { |
Brian Paul | 9cb2d9d | 2015-08-07 15:21:10 -0600 | [diff] [blame] | 50 | linkage->input_map[i] = INVALID_INDEX; |
| 51 | } |
| 52 | |
| 53 | /* Assign input slots for input shader inputs. |
| 54 | * Basically, we want to use the same index for the output shader's outputs |
| 55 | * and the input shader's inputs that should be linked together. |
| 56 | * We'll modify the input shader's inputs to match the output shader. |
| 57 | */ |
| 58 | assert(inshader_info->num_inputs <= |
Brian Paul | e0184b3 | 2016-04-25 09:34:40 -0600 | [diff] [blame] | 59 | ARRAY_SIZE(inshader_info->input_semantic_name)); |
Brian Paul | 9cb2d9d | 2015-08-07 15:21:10 -0600 | [diff] [blame] | 60 | |
| 61 | /* free register index that can be used for built-in varyings */ |
| 62 | free_slot = outshader_info->num_outputs + 1; |
| 63 | |
| 64 | for (i = 0; i < inshader_info->num_inputs; i++) { |
Brian Paul | 1b5e88b | 2017-07-10 14:03:48 -0600 | [diff] [blame] | 65 | enum tgsi_semantic sem_name = inshader_info->input_semantic_name[i]; |
Brian Paul | 9cb2d9d | 2015-08-07 15:21:10 -0600 | [diff] [blame] | 66 | unsigned sem_index = inshader_info->input_semantic_index[i]; |
| 67 | unsigned j; |
| 68 | /** |
| 69 | * Get the clip distance inputs from the output shader's |
| 70 | * clip distance shadow copy. |
| 71 | */ |
| 72 | if (sem_name == TGSI_SEMANTIC_CLIPDIST) { |
| 73 | linkage->input_map[i] = outshader_info->num_outputs + 1 + sem_index; |
| 74 | /* make sure free_slot includes this extra output */ |
| 75 | free_slot = MAX2(free_slot, linkage->input_map[i] + 1); |
| 76 | } |
| 77 | else { |
| 78 | /* search output shader outputs for same item */ |
| 79 | for (j = 0; j < outshader_info->num_outputs; j++) { |
Brian Paul | e0184b3 | 2016-04-25 09:34:40 -0600 | [diff] [blame] | 80 | assert(j < ARRAY_SIZE(outshader_info->output_semantic_name)); |
Brian Paul | 9cb2d9d | 2015-08-07 15:21:10 -0600 | [diff] [blame] | 81 | if (outshader_info->output_semantic_name[j] == sem_name && |
| 82 | outshader_info->output_semantic_index[j] == sem_index) { |
| 83 | linkage->input_map[i] = j; |
| 84 | break; |
| 85 | } |
| 86 | } |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | linkage->num_inputs = inshader_info->num_inputs; |
| 91 | |
| 92 | /* Things like the front-face register are handled here */ |
| 93 | for (i = 0; i < inshader_info->num_inputs; i++) { |
| 94 | if (linkage->input_map[i] == INVALID_INDEX) { |
| 95 | unsigned j = free_slot++; |
| 96 | linkage->input_map[i] = j; |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | /* Debug */ |
Charmaine Lee | 304b5a1 | 2016-06-03 14:24:19 -0700 | [diff] [blame] | 101 | if (SVGA_DEBUG & DEBUG_TGSI) { |
Brian Paul | 9cb2d9d | 2015-08-07 15:21:10 -0600 | [diff] [blame] | 102 | unsigned reg = 0; |
Charmaine Lee | 304b5a1 | 2016-06-03 14:24:19 -0700 | [diff] [blame] | 103 | debug_printf("### linkage info:\n"); |
| 104 | |
Brian Paul | 9cb2d9d | 2015-08-07 15:21:10 -0600 | [diff] [blame] | 105 | for (i = 0; i < linkage->num_inputs; i++) { |
| 106 | |
| 107 | assert(linkage->input_map[i] != INVALID_INDEX); |
| 108 | |
Charmaine Lee | 304b5a1 | 2016-06-03 14:24:19 -0700 | [diff] [blame] | 109 | debug_printf(" input[%d] slot %u %s %u %s\n", |
Brian Paul | 9cb2d9d | 2015-08-07 15:21:10 -0600 | [diff] [blame] | 110 | i, |
| 111 | linkage->input_map[i], |
| 112 | tgsi_semantic_names[inshader_info->input_semantic_name[i]], |
| 113 | inshader_info->input_semantic_index[i], |
| 114 | tgsi_interpolate_names[inshader_info->input_interpolate[i]]); |
| 115 | |
| 116 | /* make sure no repeating register index */ |
| 117 | if (reg & 1 << linkage->input_map[i]) { |
| 118 | assert(0); |
| 119 | } |
| 120 | reg |= 1 << linkage->input_map[i]; |
| 121 | } |
| 122 | } |
| 123 | } |