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| Rev | Author | Line No. | Line |
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| 5564 | serge | 1 | /* |
| 2 | * Copyright © 2013 Intel Corporation |
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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 |
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| 21 | * DEALINGS IN THE SOFTWARE. |
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| 22 | */ |
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| 23 | |||
| 24 | /** |
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| 25 | * \file brw_lower_unnormalized_offset.cpp |
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| 26 | * |
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| 27 | * IR lower pass to convert a texture offset into an adjusted coordinate, |
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| 28 | * for use with unnormalized coordinates. At least the gather4* messages |
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| 29 | * on Ivybridge and Haswell make a mess with nonzero offsets. |
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| 30 | * |
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| 31 | * \author Chris Forbes |
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| 32 | */ |
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| 33 | |||
| 34 | #include "glsl/glsl_types.h" |
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| 35 | #include "glsl/ir.h" |
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| 36 | #include "glsl/ir_builder.h" |
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| 37 | |||
| 38 | using namespace ir_builder; |
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| 39 | |||
| 40 | class brw_lower_unnormalized_offset_visitor : public ir_hierarchical_visitor { |
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| 41 | public: |
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| 42 | brw_lower_unnormalized_offset_visitor() |
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| 43 | { |
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| 44 | progress = false; |
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| 45 | } |
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| 46 | |||
| 47 | ir_visitor_status visit_leave(ir_texture *ir); |
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| 48 | |||
| 49 | bool progress; |
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| 50 | }; |
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| 51 | |||
| 52 | ir_visitor_status |
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| 53 | brw_lower_unnormalized_offset_visitor::visit_leave(ir_texture *ir) |
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| 54 | { |
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| 55 | if (!ir->offset) |
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| 56 | return visit_continue; |
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| 57 | |||
| 58 | if (ir->op == ir_tg4 || ir->op == ir_tex) { |
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| 59 | if (ir->sampler->type->sampler_dimensionality != GLSL_SAMPLER_DIM_RECT) |
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| 60 | return visit_continue; |
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| 61 | } |
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| 62 | else if (ir->op != ir_txf) { |
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| 63 | return visit_continue; |
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| 64 | } |
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| 65 | |||
| 66 | void *mem_ctx = ralloc_parent(ir); |
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| 67 | |||
| 68 | if (ir->op == ir_txf) { |
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| 69 | /* It appears that the ld instruction used for txf does its |
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| 70 | * address bounds check before adding in the offset. To work |
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| 71 | * around this, just add the integer offset to the integer texel |
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| 72 | * coordinate, and don't put the offset in the header. |
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| 73 | */ |
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| 74 | ir_variable *var = new(mem_ctx) ir_variable(ir->coordinate->type, |
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| 75 | "coordinate", |
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| 76 | ir_var_temporary); |
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| 77 | base_ir->insert_before(var); |
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| 78 | base_ir->insert_before(assign(var, ir->coordinate)); |
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| 79 | base_ir->insert_before(assign(var, |
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| 80 | add(swizzle_for_size(var, ir->offset->type->vector_elements), ir->offset), |
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| 81 | (1 << ir->offset->type->vector_elements) - 1)); |
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| 82 | |||
| 83 | ir->coordinate = new(mem_ctx) ir_dereference_variable(var); |
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| 84 | } else { |
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| 85 | ir->coordinate = add(ir->coordinate, i2f(ir->offset)); |
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| 86 | } |
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| 87 | |||
| 88 | ir->offset = NULL; |
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| 89 | |||
| 90 | progress = true; |
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| 91 | return visit_continue; |
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| 92 | } |
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| 93 | |||
| 94 | extern "C" { |
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| 95 | |||
| 96 | bool |
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| 97 | brw_do_lower_unnormalized_offset(exec_list *instructions) |
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| 98 | { |
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| 99 | brw_lower_unnormalized_offset_visitor v; |
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| 100 | |||
| 101 | visit_list_elements(&v, instructions); |
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| 102 | |||
| 103 | return v.progress; |
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| 104 | } |
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| 105 | |||
| 106 | } |