0,0 → 1,97 |
/* |
* Copyright © 2010 Intel Corporation |
* |
* Permission is hereby granted, free of charge, to any person obtaining a |
* copy of this software and associated documentation files (the "Software"), |
* to deal in the Software without restriction, including without limitation |
* the rights to use, copy, modify, merge, publish, distribute, sublicense, |
* and/or sell copies of the Software, and to permit persons to whom the |
* Software is furnished to do so, subject to the following conditions: |
* |
* The above copyright notice and this permission notice (including the next |
* paragraph) shall be included in all copies or substantial portions of the |
* Software. |
* |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
* DEALINGS IN THE SOFTWARE. |
*/ |
|
/** |
* \file opt_swizzle_swizzle.cpp |
* |
* Eliminates the second swizzle in a swizzle chain. |
*/ |
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#include "ir.h" |
#include "ir_visitor.h" |
#include "ir_optimization.h" |
#include "glsl_types.h" |
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namespace { |
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class ir_swizzle_swizzle_visitor : public ir_hierarchical_visitor { |
public: |
ir_swizzle_swizzle_visitor() |
{ |
progress = false; |
} |
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virtual ir_visitor_status visit_enter(ir_swizzle *); |
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bool progress; |
}; |
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} /* unnamed namespace */ |
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ir_visitor_status |
ir_swizzle_swizzle_visitor::visit_enter(ir_swizzle *ir) |
{ |
int mask2[4]; |
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ir_swizzle *swiz2 = ir->val->as_swizzle(); |
if (!swiz2) |
return visit_continue; |
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memset(&mask2, 0, sizeof(mask2)); |
if (swiz2->mask.num_components >= 1) |
mask2[0] = swiz2->mask.x; |
if (swiz2->mask.num_components >= 2) |
mask2[1] = swiz2->mask.y; |
if (swiz2->mask.num_components >= 3) |
mask2[2] = swiz2->mask.z; |
if (swiz2->mask.num_components >= 4) |
mask2[3] = swiz2->mask.w; |
|
if (ir->mask.num_components >= 1) |
ir->mask.x = mask2[ir->mask.x]; |
if (ir->mask.num_components >= 2) |
ir->mask.y = mask2[ir->mask.y]; |
if (ir->mask.num_components >= 3) |
ir->mask.z = mask2[ir->mask.z]; |
if (ir->mask.num_components >= 4) |
ir->mask.w = mask2[ir->mask.w]; |
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ir->val = swiz2->val; |
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this->progress = true; |
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return visit_continue; |
} |
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/** |
* Does a copy propagation pass on the code present in the instruction stream. |
*/ |
bool |
do_swizzle_swizzle(exec_list *instructions) |
{ |
ir_swizzle_swizzle_visitor v; |
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v.run(instructions); |
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return v.progress; |
} |