1/* 2 * Copyright 2011 Tom Stellard <tstellar@gmail.com> 3 * 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining 7 * a copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sublicense, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial 16 * portions of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 21 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE 22 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 24 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 */ 27 28#include "radeon_compiler.h" 29#include "radeon_compiler_util.h" 30#include "radeon_opcodes.h" 31#include "radeon_program_pair.h" 32 33static void mark_used_presub(struct rc_pair_sub_instruction * sub) 34{ 35 if (sub->Src[RC_PAIR_PRESUB_SRC].Used) { 36 unsigned int presub_reg_count = rc_presubtract_src_reg_count( 37 sub->Src[RC_PAIR_PRESUB_SRC].Index); 38 unsigned int i; 39 for (i = 0; i < presub_reg_count; i++) { 40 sub->Src[i].Used = 1; 41 } 42 } 43} 44 45static void mark_used( 46 struct rc_instruction * inst, 47 struct rc_pair_sub_instruction * sub) 48{ 49 unsigned int i; 50 const struct rc_opcode_info * info = rc_get_opcode_info(sub->Opcode); 51 for (i = 0; i < info->NumSrcRegs; i++) { 52 unsigned int src_type = rc_source_type_swz(sub->Arg[i].Swizzle); 53 if (src_type & RC_SOURCE_RGB) { 54 inst->U.P.RGB.Src[sub->Arg[i].Source].Used = 1; 55 } 56 57 if (src_type & RC_SOURCE_ALPHA) { 58 inst->U.P.Alpha.Src[sub->Arg[i].Source].Used = 1; 59 } 60 } 61} 62 63/** 64 * This pass finds sources that are not used by their instruction and marks 65 * them as unused. 66 */ 67void rc_pair_remove_dead_sources(struct radeon_compiler * c, void *user) 68{ 69 struct rc_instruction * inst; 70 for (inst = c->Program.Instructions.Next; 71 inst != &c->Program.Instructions; 72 inst = inst->Next) { 73 unsigned int i; 74 if (inst->Type == RC_INSTRUCTION_NORMAL) 75 continue; 76 77 /* Mark all sources as unused */ 78 for (i = 0; i < 4; i++) { 79 inst->U.P.RGB.Src[i].Used = 0; 80 inst->U.P.Alpha.Src[i].Used = 0; 81 } 82 mark_used(inst, &inst->U.P.RGB); 83 mark_used(inst, &inst->U.P.Alpha); 84 85 mark_used_presub(&inst->U.P.RGB); 86 mark_used_presub(&inst->U.P.Alpha); 87 } 88} 89