| /* |
| * Copyright (C) 2008-2009 Nicolai Haehnle. |
| * |
| * All Rights Reserved. |
| * |
| * 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 COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS 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. |
| * |
| */ |
| |
| #include "radeon_program_pair.h" |
| |
| #include "radeon_compiler_util.h" |
| |
| #include <stdlib.h> |
| |
| /** |
| * Return the source slot where we installed the given register access, |
| * or -1 if no slot was free anymore. |
| */ |
| int rc_pair_alloc_source(struct rc_pair_instruction *pair, |
| unsigned int rgb, unsigned int alpha, |
| rc_register_file file, unsigned int index) |
| { |
| int candidate = -1; |
| int candidate_quality = -1; |
| unsigned int alpha_used = 0; |
| unsigned int rgb_used = 0; |
| int i; |
| |
| if ((!rgb && !alpha) || file == RC_FILE_NONE) |
| return 0; |
| |
| /* Make sure only one presubtract operation is used per instruction. */ |
| if (file == RC_FILE_PRESUB) { |
| if (rgb && pair->RGB.Src[RC_PAIR_PRESUB_SRC].Used |
| && index != pair->RGB.Src[RC_PAIR_PRESUB_SRC].Index) { |
| return -1; |
| } |
| |
| if (alpha && pair->Alpha.Src[RC_PAIR_PRESUB_SRC].Used |
| && index != pair->Alpha.Src[RC_PAIR_PRESUB_SRC].Index) { |
| return -1; |
| } |
| } |
| |
| for(i = 0; i < 3; ++i) { |
| int q = 0; |
| if (rgb) { |
| if (pair->RGB.Src[i].Used) { |
| if (pair->RGB.Src[i].File != file || |
| pair->RGB.Src[i].Index != index) { |
| rgb_used++; |
| continue; |
| } |
| q++; |
| } |
| } |
| if (alpha) { |
| if (pair->Alpha.Src[i].Used) { |
| if (pair->Alpha.Src[i].File != file || |
| pair->Alpha.Src[i].Index != index) { |
| alpha_used++; |
| continue; |
| } |
| q++; |
| } |
| } |
| if (q > candidate_quality) { |
| candidate_quality = q; |
| candidate = i; |
| } |
| } |
| |
| if (file == RC_FILE_PRESUB) { |
| candidate = RC_PAIR_PRESUB_SRC; |
| } else if (candidate < 0 || (rgb && rgb_used > 2) |
| || (alpha && alpha_used > 2)) { |
| return -1; |
| } |
| |
| /* candidate >= 0 */ |
| |
| if (rgb) { |
| pair->RGB.Src[candidate].Used = 1; |
| pair->RGB.Src[candidate].File = file; |
| pair->RGB.Src[candidate].Index = index; |
| if (candidate == RC_PAIR_PRESUB_SRC) { |
| /* For registers with the RC_FILE_PRESUB file, |
| * the index stores the presubtract op. */ |
| int src_regs = rc_presubtract_src_reg_count(index); |
| for(i = 0; i < src_regs; i++) { |
| pair->RGB.Src[i].Used = 1; |
| } |
| } |
| } |
| if (alpha) { |
| pair->Alpha.Src[candidate].Used = 1; |
| pair->Alpha.Src[candidate].File = file; |
| pair->Alpha.Src[candidate].Index = index; |
| if (candidate == RC_PAIR_PRESUB_SRC) { |
| /* For registers with the RC_FILE_PRESUB file, |
| * the index stores the presubtract op. */ |
| int src_regs = rc_presubtract_src_reg_count(index); |
| for(i=0; i < src_regs; i++) { |
| pair->Alpha.Src[i].Used = 1; |
| } |
| } |
| } |
| |
| return candidate; |
| } |
| |
| static void pair_foreach_source_callback( |
| struct rc_pair_instruction * pair, |
| void * data, |
| rc_pair_foreach_src_fn cb, |
| unsigned int swz, |
| unsigned int src) |
| { |
| /* swz > 3 means that the swizzle is either not used, or a constant |
| * swizzle (e.g. 0, 1, 0.5). */ |
| if(swz > 3) |
| return; |
| |
| if(swz == RC_SWIZZLE_W) { |
| if (src == RC_PAIR_PRESUB_SRC) { |
| unsigned int i; |
| unsigned int src_count = rc_presubtract_src_reg_count( |
| pair->Alpha.Src[RC_PAIR_PRESUB_SRC].Index); |
| for(i = 0; i < src_count; i++) { |
| cb(data, &pair->Alpha.Src[i]); |
| } |
| } else { |
| cb(data, &pair->Alpha.Src[src]); |
| } |
| } else { |
| if (src == RC_PAIR_PRESUB_SRC) { |
| unsigned int i; |
| unsigned int src_count = rc_presubtract_src_reg_count( |
| pair->RGB.Src[RC_PAIR_PRESUB_SRC].Index); |
| for(i = 0; i < src_count; i++) { |
| cb(data, &pair->RGB.Src[i]); |
| } |
| } |
| else { |
| cb(data, &pair->RGB.Src[src]); |
| } |
| } |
| } |
| |
| void rc_pair_foreach_source_that_alpha_reads( |
| struct rc_pair_instruction * pair, |
| void * data, |
| rc_pair_foreach_src_fn cb) |
| { |
| unsigned int i; |
| const struct rc_opcode_info * info = |
| rc_get_opcode_info(pair->Alpha.Opcode); |
| for(i = 0; i < info->NumSrcRegs; i++) { |
| pair_foreach_source_callback(pair, data, cb, |
| GET_SWZ(pair->Alpha.Arg[i].Swizzle, 0), |
| pair->Alpha.Arg[i].Source); |
| } |
| } |
| |
| void rc_pair_foreach_source_that_rgb_reads( |
| struct rc_pair_instruction * pair, |
| void * data, |
| rc_pair_foreach_src_fn cb) |
| { |
| unsigned int i; |
| const struct rc_opcode_info * info = |
| rc_get_opcode_info(pair->RGB.Opcode); |
| for(i = 0; i < info->NumSrcRegs; i++) { |
| unsigned int chan; |
| unsigned int swz = RC_SWIZZLE_UNUSED; |
| /* Find a swizzle that is either X,Y,Z,or W. We assume here |
| * that if one channel swizzles X,Y, or Z, then none of the |
| * other channels swizzle W, and vice-versa. */ |
| for(chan = 0; chan < 4; chan++) { |
| swz = GET_SWZ(pair->RGB.Arg[i].Swizzle, chan); |
| if(swz == RC_SWIZZLE_X || swz == RC_SWIZZLE_Y |
| || swz == RC_SWIZZLE_Z || swz == RC_SWIZZLE_W) |
| continue; |
| } |
| pair_foreach_source_callback(pair, data, cb, |
| swz, |
| pair->RGB.Arg[i].Source); |
| } |
| } |
| |
| struct rc_pair_instruction_source * rc_pair_get_src( |
| struct rc_pair_instruction * pair_inst, |
| struct rc_pair_instruction_arg * arg) |
| { |
| unsigned int type; |
| |
| type = rc_source_type_swz(arg->Swizzle); |
| |
| if (type & RC_SOURCE_RGB) { |
| return &pair_inst->RGB.Src[arg->Source]; |
| } else if (type & RC_SOURCE_ALPHA) { |
| return &pair_inst->Alpha.Src[arg->Source]; |
| } else { |
| return NULL; |
| } |
| } |
| |
| int rc_pair_get_src_index( |
| struct rc_pair_instruction * pair_inst, |
| struct rc_pair_instruction_source * src) |
| { |
| int i; |
| for (i = 0; i < 3; i++) { |
| if (&pair_inst->RGB.Src[i] == src |
| || &pair_inst->Alpha.Src[i] == src) { |
| return i; |
| } |
| } |
| return -1; |
| } |