1f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/* 2f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Copyright © 2010 Intel Corporation 3f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 4f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Permission is hereby granted, free of charge, to any person obtaining a 5f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * copy of this software and associated documentation files (the "Software"), 6f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * to deal in the Software without restriction, including without limitation 7f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * and/or sell copies of the Software, and to permit persons to whom the 9f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Software is furnished to do so, subject to the following conditions: 10f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 11f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * The above copyright notice and this permission notice (including the next 12f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * paragraph) shall be included in all copies or substantial portions of the 13f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Software. 14f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 15f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 21f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * DEALINGS IN THE SOFTWARE. 22f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 23f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 24f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/** 25f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * \file lower_noise.cpp 26f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * IR lower pass to remove noise opcodes. 27f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 28f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * \author Ian Romanick <ian.d.romanick@intel.com> 29f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 30f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 31f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#include "ir.h" 32f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#include "ir_rvalue_visitor.h" 33f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 34f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgclass lower_noise_visitor : public ir_rvalue_visitor { 35f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgpublic: 36f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org lower_noise_visitor() : progress(false) 37f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org { 38f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* empty */ 39f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 40f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 41f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org void handle_rvalue(ir_rvalue **rvalue) 42f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org { 43f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (!*rvalue) 44f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return; 45f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 46f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ir_expression *expr = (*rvalue)->as_expression(); 47f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (!expr) 48f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return; 49f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 50f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* In the future, ir_unop_noise may be replaced by a call to a function 51f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * that implements noise. No hardware has a noise instruction. 52f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 53f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (expr->operation == ir_unop_noise) { 54f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org *rvalue = ir_constant::zero(ralloc_parent(expr), expr->type); 55f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org this->progress = true; 56f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 57f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 58f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 59f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org bool progress; 60f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org}; 61f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 62f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 63f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgbool 64f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orglower_noise(exec_list *instructions) 65f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org{ 66f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org lower_noise_visitor v; 67f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 68f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org visit_list_elements(&v, instructions); 69f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 70f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return v.progress; 71f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org} 72