aboutsummaryrefslogtreecommitdiff
path: root/mesalib/src/glsl/ir_sub_to_add_neg.cpp
diff options
context:
space:
mode:
authormarha <marha@users.sourceforge.net>2010-12-28 16:10:20 +0000
committermarha <marha@users.sourceforge.net>2010-12-28 16:10:20 +0000
commit807c6931fe683fd844ceec1b023232181e6aae03 (patch)
tree1a131ed95fe2200d0ad33da8f7755a7ed2364adc /mesalib/src/glsl/ir_sub_to_add_neg.cpp
parent973099dda7e49e5abe29819a7124b3b1e7bd8b92 (diff)
downloadvcxsrv-807c6931fe683fd844ceec1b023232181e6aae03.tar.gz
vcxsrv-807c6931fe683fd844ceec1b023232181e6aae03.tar.bz2
vcxsrv-807c6931fe683fd844ceec1b023232181e6aae03.zip
xserver and mesa git update 28-12-2010
Diffstat (limited to 'mesalib/src/glsl/ir_sub_to_add_neg.cpp')
-rw-r--r--mesalib/src/glsl/ir_sub_to_add_neg.cpp76
1 files changed, 0 insertions, 76 deletions
diff --git a/mesalib/src/glsl/ir_sub_to_add_neg.cpp b/mesalib/src/glsl/ir_sub_to_add_neg.cpp
deleted file mode 100644
index 7ed8c1495..000000000
--- a/mesalib/src/glsl/ir_sub_to_add_neg.cpp
+++ /dev/null
@@ -1,76 +0,0 @@
-/*
- * 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 ir_sub_to_add_neg.cpp
- *
- * Breaks an ir_binop_sub expression down to add(op0, neg(op1))
- *
- * This simplifies expression reassociation, and for many backends
- * there is no subtract operation separate from adding the negation.
- * For backends with native subtract operations, they will probably
- * want to recognize add(op0, neg(op1)) or the other way around to
- * produce a subtract anyway.
- */
-
-#include "ir.h"
-
-class ir_sub_to_add_neg_visitor : public ir_hierarchical_visitor {
-public:
- ir_sub_to_add_neg_visitor()
- {
- this->progress = false;
- }
-
- ir_visitor_status visit_leave(ir_expression *);
-
- bool progress;
-};
-
-bool
-do_sub_to_add_neg(exec_list *instructions)
-{
- ir_sub_to_add_neg_visitor v;
-
- visit_list_elements(&v, instructions);
- return v.progress;
-}
-
-ir_visitor_status
-ir_sub_to_add_neg_visitor::visit_leave(ir_expression *ir)
-{
- if (ir->operation != ir_binop_sub)
- return visit_continue;
-
- void *mem_ctx = talloc_parent(ir);
-
- ir->operation = ir_binop_add;
- ir->operands[1] = new(mem_ctx) ir_expression(ir_unop_neg,
- ir->operands[1]->type,
- ir->operands[1],
- NULL);
-
- this->progress = true;
-
- return visit_continue;
-}