Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4358 | Serge | 1 | /* |
| 2 | * Copyright © 2010 Intel Corporation |
||
| 3 | * |
||
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
||
| 5 | * copy of this software and associated documentation files (the "Software"), |
||
| 6 | * to deal in the Software without restriction, including without limitation |
||
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
||
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
||
| 9 | * Software is furnished to do so, subject to the following conditions: |
||
| 10 | * |
||
| 11 | * The above copyright notice and this permission notice (including the next |
||
| 12 | * paragraph) shall be included in all copies or substantial portions of the |
||
| 13 | * Software. |
||
| 14 | * |
||
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
||
| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
||
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
||
| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
||
| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
||
| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
||
| 21 | * DEALINGS IN THE SOFTWARE. |
||
| 22 | */ |
||
| 23 | |||
| 24 | /** |
||
| 25 | * \file opt_swizzle_swizzle.cpp |
||
| 26 | * |
||
| 27 | * Eliminates the second swizzle in a swizzle chain. |
||
| 28 | */ |
||
| 29 | |||
| 30 | #include "ir.h" |
||
| 31 | #include "ir_visitor.h" |
||
| 32 | #include "ir_optimization.h" |
||
| 33 | #include "glsl_types.h" |
||
| 34 | |||
| 35 | namespace { |
||
| 36 | |||
| 37 | class ir_swizzle_swizzle_visitor : public ir_hierarchical_visitor { |
||
| 38 | public: |
||
| 39 | ir_swizzle_swizzle_visitor() |
||
| 40 | { |
||
| 41 | progress = false; |
||
| 42 | } |
||
| 43 | |||
| 44 | virtual ir_visitor_status visit_enter(ir_swizzle *); |
||
| 45 | |||
| 46 | bool progress; |
||
| 47 | }; |
||
| 48 | |||
| 49 | } /* unnamed namespace */ |
||
| 50 | |||
| 51 | ir_visitor_status |
||
| 52 | ir_swizzle_swizzle_visitor::visit_enter(ir_swizzle *ir) |
||
| 53 | { |
||
| 54 | int mask2[4]; |
||
| 55 | |||
| 56 | ir_swizzle *swiz2 = ir->val->as_swizzle(); |
||
| 57 | if (!swiz2) |
||
| 58 | return visit_continue; |
||
| 59 | |||
| 60 | memset(&mask2, 0, sizeof(mask2)); |
||
| 61 | if (swiz2->mask.num_components >= 1) |
||
| 62 | mask2[0] = swiz2->mask.x; |
||
| 63 | if (swiz2->mask.num_components >= 2) |
||
| 64 | mask2[1] = swiz2->mask.y; |
||
| 65 | if (swiz2->mask.num_components >= 3) |
||
| 66 | mask2[2] = swiz2->mask.z; |
||
| 67 | if (swiz2->mask.num_components >= 4) |
||
| 68 | mask2[3] = swiz2->mask.w; |
||
| 69 | |||
| 70 | if (ir->mask.num_components >= 1) |
||
| 71 | ir->mask.x = mask2[ir->mask.x]; |
||
| 72 | if (ir->mask.num_components >= 2) |
||
| 73 | ir->mask.y = mask2[ir->mask.y]; |
||
| 74 | if (ir->mask.num_components >= 3) |
||
| 75 | ir->mask.z = mask2[ir->mask.z]; |
||
| 76 | if (ir->mask.num_components >= 4) |
||
| 77 | ir->mask.w = mask2[ir->mask.w]; |
||
| 78 | |||
| 79 | ir->val = swiz2->val; |
||
| 80 | |||
| 81 | this->progress = true; |
||
| 82 | |||
| 83 | return visit_continue; |
||
| 84 | } |
||
| 85 | |||
| 86 | /** |
||
| 87 | * Does a copy propagation pass on the code present in the instruction stream. |
||
| 88 | */ |
||
| 89 | bool |
||
| 90 | do_swizzle_swizzle(exec_list *instructions) |
||
| 91 | { |
||
| 92 | ir_swizzle_swizzle_visitor v; |
||
| 93 | |||
| 94 | v.run(instructions); |
||
| 95 | |||
| 96 | return v.progress; |
||
| 97 | } |