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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4358 | 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 opt_flip_matrices.cpp |
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| 26 | * |
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| 27 | * Convert (matrix * vector) operations to (vector * matrixTranspose), |
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| 28 | * which can be done using dot products rather than multiplies and adds. |
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| 29 | * On some hardware, this is more efficient. |
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| 30 | * |
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| 31 | * This currently only does the conversion for built-in matrices which |
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| 32 | * already have transposed equivalents. Namely, gl_ModelViewProjectionMatrix |
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| 33 | * and gl_TextureMatrix. |
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| 34 | */ |
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| 35 | #include "ir.h" |
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| 36 | #include "ir_optimization.h" |
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| 37 | #include "main/macros.h" |
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| 38 | |||
| 39 | namespace { |
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| 40 | class matrix_flipper : public ir_hierarchical_visitor { |
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| 41 | public: |
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| 42 | matrix_flipper(exec_list *instructions) |
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| 43 | { |
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| 44 | progress = false; |
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| 45 | mvp_transpose = NULL; |
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| 46 | texmat_transpose = NULL; |
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| 47 | |||
| 48 | foreach_list(n, instructions) { |
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| 49 | ir_instruction *ir = (ir_instruction *) n; |
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| 50 | ir_variable *var = ir->as_variable(); |
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| 51 | if (!var) |
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| 52 | continue; |
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| 53 | if (strcmp(var->name, "gl_ModelViewProjectionMatrixTranspose") == 0) |
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| 54 | mvp_transpose = var; |
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| 55 | if (strcmp(var->name, "gl_TextureMatrixTranspose") == 0) |
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| 56 | texmat_transpose = var; |
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| 57 | } |
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| 58 | } |
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| 59 | |||
| 60 | ir_visitor_status visit_enter(ir_expression *ir); |
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| 61 | |||
| 62 | bool progress; |
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| 63 | |||
| 64 | private: |
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| 65 | ir_variable *mvp_transpose; |
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| 66 | ir_variable *texmat_transpose; |
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| 67 | }; |
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| 68 | } |
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| 69 | |||
| 70 | ir_visitor_status |
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| 71 | matrix_flipper::visit_enter(ir_expression *ir) |
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| 72 | { |
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| 73 | if (ir->operation != ir_binop_mul || |
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| 74 | !ir->operands[0]->type->is_matrix() || |
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| 75 | !ir->operands[1]->type->is_vector()) |
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| 76 | return visit_continue; |
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| 77 | |||
| 78 | ir_variable *mat_var = ir->operands[0]->variable_referenced(); |
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| 79 | if (!mat_var) |
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| 80 | return visit_continue; |
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| 81 | |||
| 82 | if (mvp_transpose && |
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| 83 | strcmp(mat_var->name, "gl_ModelViewProjectionMatrix") == 0) { |
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| 84 | #ifndef NDEBUG |
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| 85 | ir_dereference_variable *deref = ir->operands[0]->as_dereference_variable(); |
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| 86 | assert(deref && deref->var == mat_var); |
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| 87 | #endif |
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| 88 | |||
| 89 | void *mem_ctx = ralloc_parent(ir); |
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| 90 | |||
| 91 | ir->operands[0] = ir->operands[1]; |
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| 92 | ir->operands[1] = new(mem_ctx) ir_dereference_variable(mvp_transpose); |
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| 93 | |||
| 94 | progress = true; |
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| 95 | } else if (texmat_transpose && |
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| 96 | strcmp(mat_var->name, "gl_TextureMatrix") == 0) { |
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| 97 | ir_dereference_array *array_ref = ir->operands[0]->as_dereference_array(); |
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| 98 | assert(array_ref != NULL); |
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| 99 | ir_dereference_variable *var_ref = array_ref->array->as_dereference_variable(); |
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| 100 | assert(var_ref && var_ref->var == mat_var); |
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| 101 | |||
| 102 | ir->operands[0] = ir->operands[1]; |
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| 103 | ir->operands[1] = array_ref; |
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| 104 | |||
| 105 | var_ref->var = texmat_transpose; |
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| 106 | |||
| 107 | texmat_transpose->max_array_access = |
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| 108 | MAX2(texmat_transpose->max_array_access, mat_var->max_array_access); |
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| 109 | |||
| 110 | progress = true; |
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| 111 | } |
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| 112 | |||
| 113 | return visit_continue; |
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| 114 | } |
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| 115 | |||
| 116 | bool |
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| 117 | opt_flip_matrices(struct exec_list *instructions) |
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| 118 | { |
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| 119 | matrix_flipper v(instructions); |
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| 120 | |||
| 121 | visit_list_elements(&v, instructions); |
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| 122 | |||
| 123 | return v.progress; |
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| 124 | } |