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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5563 | serge | 1 | /* |
| 2 | * Copyright 2011 Tom Stellard |
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| 3 | * |
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| 4 | * All Rights Reserved. |
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| 5 | * |
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| 6 | * Permission is hereby granted, free of charge, to any person obtaining |
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| 7 | * a copy of this software and associated documentation files (the |
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| 8 | * "Software"), to deal in the Software without restriction, including |
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| 9 | * without limitation the rights to use, copy, modify, merge, publish, |
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| 10 | * distribute, sublicense, and/or sell copies of the Software, and to |
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| 11 | * permit persons to whom the Software is furnished to do so, subject to |
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| 12 | * the following conditions: |
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| 13 | * |
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| 14 | * The above copyright notice and this permission notice (including the |
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| 15 | * next paragraph) shall be included in all copies or substantial |
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| 16 | * portions of the Software. |
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| 17 | * |
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| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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| 19 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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| 20 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
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| 21 | * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE |
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| 22 | * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
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| 23 | * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
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| 24 | * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 25 | * |
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| 26 | */ |
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| 27 | |||
| 28 | #include "radeon_compiler.h" |
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| 29 | #include "radeon_compiler_util.h" |
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| 30 | #include "radeon_opcodes.h" |
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| 31 | #include "radeon_program_pair.h" |
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| 32 | |||
| 33 | static void mark_used_presub(struct rc_pair_sub_instruction * sub) |
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| 34 | { |
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| 35 | if (sub->Src[RC_PAIR_PRESUB_SRC].Used) { |
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| 36 | unsigned int presub_reg_count = rc_presubtract_src_reg_count( |
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| 37 | sub->Src[RC_PAIR_PRESUB_SRC].Index); |
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| 38 | unsigned int i; |
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| 39 | for (i = 0; i < presub_reg_count; i++) { |
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| 40 | sub->Src[i].Used = 1; |
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| 41 | } |
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| 42 | } |
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| 43 | } |
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| 44 | |||
| 45 | static void mark_used( |
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| 46 | struct rc_instruction * inst, |
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| 47 | struct rc_pair_sub_instruction * sub) |
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| 48 | { |
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| 49 | unsigned int i; |
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| 50 | const struct rc_opcode_info * info = rc_get_opcode_info(sub->Opcode); |
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| 51 | for (i = 0; i < info->NumSrcRegs; i++) { |
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| 52 | unsigned int src_type = rc_source_type_swz(sub->Arg[i].Swizzle); |
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| 53 | if (src_type & RC_SOURCE_RGB) { |
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| 54 | inst->U.P.RGB.Src[sub->Arg[i].Source].Used = 1; |
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| 55 | } |
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| 56 | |||
| 57 | if (src_type & RC_SOURCE_ALPHA) { |
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| 58 | inst->U.P.Alpha.Src[sub->Arg[i].Source].Used = 1; |
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| 59 | } |
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| 60 | } |
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| 61 | } |
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| 62 | |||
| 63 | /** |
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| 64 | * This pass finds sources that are not used by their instruction and marks |
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| 65 | * them as unused. |
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| 66 | */ |
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| 67 | void rc_pair_remove_dead_sources(struct radeon_compiler * c, void *user) |
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| 68 | { |
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| 69 | struct rc_instruction * inst; |
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| 70 | for (inst = c->Program.Instructions.Next; |
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| 71 | inst != &c->Program.Instructions; |
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| 72 | inst = inst->Next) { |
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| 73 | unsigned int i; |
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| 74 | if (inst->Type == RC_INSTRUCTION_NORMAL) |
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| 75 | continue; |
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| 76 | |||
| 77 | /* Mark all sources as unused */ |
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| 78 | for (i = 0; i < 4; i++) { |
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| 79 | inst->U.P.RGB.Src[i].Used = 0; |
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| 80 | inst->U.P.Alpha.Src[i].Used = 0; |
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| 81 | } |
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| 82 | mark_used(inst, &inst->U.P.RGB); |
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| 83 | mark_used(inst, &inst->U.P.Alpha); |
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| 84 | |||
| 85 | mark_used_presub(&inst->U.P.RGB); |
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| 86 | mark_used_presub(&inst->U.P.Alpha); |
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| 87 | } |
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| 88 | } |