From 63684a9ae7a66f68df1f2c68cd9358e5622122a3 Mon Sep 17 00:00:00 2001 From: Kenneth Graunke Date: Thu, 18 Nov 2010 17:54:07 -0800 Subject: glsl: Combine many instruction lowering passes into one. This should save on the overhead of tree-walking and provide a convenient place to add more instruction lowering in the future. Signed-off-by: Ian Romanick --- src/glsl/lower_sub_to_add_neg.cpp | 76 --------------------------------------- 1 file changed, 76 deletions(-) delete mode 100644 src/glsl/lower_sub_to_add_neg.cpp (limited to 'src/glsl/lower_sub_to_add_neg.cpp') diff --git a/src/glsl/lower_sub_to_add_neg.cpp b/src/glsl/lower_sub_to_add_neg.cpp deleted file mode 100644 index 9e4019709b..0000000000 --- a/src/glsl/lower_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 lower_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; -} -- cgit v1.2.3