diff options
Diffstat (limited to 'src/mesa/drivers/dri/r300/compiler/radeon_dataflow_dealias.c')
| -rw-r--r-- | src/mesa/drivers/dri/r300/compiler/radeon_dataflow_dealias.c | 150 |
1 files changed, 0 insertions, 150 deletions
diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_dataflow_dealias.c b/src/mesa/drivers/dri/r300/compiler/radeon_dataflow_dealias.c deleted file mode 100644 index 4596636970..0000000000 --- a/src/mesa/drivers/dri/r300/compiler/radeon_dataflow_dealias.c +++ /dev/null @@ -1,150 +0,0 @@ -/* - * Copyright (C) 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_dataflow.h" - -#include "radeon_compiler.h" - - -#define DEALIAS_LIST_SIZE 128 - -struct dealias_state { - struct radeon_compiler * C; - - unsigned int OldIndex:RC_REGISTER_INDEX_BITS; - unsigned int NewIndex:RC_REGISTER_INDEX_BITS; - unsigned int DealiasFail:1; - - struct rc_dataflow_vector * List[DEALIAS_LIST_SIZE]; - unsigned int Length; -}; - -static void push_dealias_vector(struct dealias_state * s, struct rc_dataflow_vector * vec) -{ - if (s->Length >= DEALIAS_LIST_SIZE) { - rc_debug(s->C, "%s: list size exceeded\n", __FUNCTION__); - s->DealiasFail = 1; - return; - } - - if (rc_assert(s->C, vec->File == RC_FILE_TEMPORARY && vec->Index == s->OldIndex)) - return; - - s->List[s->Length++] = vec; -} - -static void run_dealias(struct dealias_state * s) -{ - unsigned int i; - - for(i = 0; i < s->Length && !s->DealiasFail; ++i) { - struct rc_dataflow_vector * vec = s->List[i]; - struct rc_dataflow_ref * ref; - - for(ref = vec->Refs.Next; ref != &vec->Refs; ref = ref->Next) { - if (ref->ReadInstruction->Dataflow.DstRegPrev == ref) - push_dealias_vector(s, ref->ReadInstruction->Dataflow.DstReg); - } - } - - if (s->DealiasFail) - return; - - for(i = 0; i < s->Length; ++i) { - struct rc_dataflow_vector * vec = s->List[i]; - struct rc_dataflow_ref * ref; - - vec->Index = s->NewIndex; - vec->WriteInstruction->I.DstReg.Index = s->NewIndex; - - for(ref = vec->Refs.Next; ref != &vec->Refs; ref = ref->Next) { - struct rc_instruction * inst = ref->ReadInstruction; - unsigned int i; - - for(i = 0; i < 3; ++i) { - if (inst->Dataflow.SrcReg[i] == ref) { - if (rc_assert(s->C, inst->I.SrcReg[i].File == RC_FILE_TEMPORARY && - inst->I.SrcReg[i].Index == s->OldIndex)) - return; - - inst->I.SrcReg[i].Index = s->NewIndex; - } - } - } - } -} - -/** - * Breaks register aliasing to reduce multiple assignments to a single register. - * - * This affects sequences like: - * MUL r0, ...; - * MAD r0, r1, r2, r0; - * In this example, a new register will be used for the destination of the - * second MAD. - * - * The purpose of this dealiasing is to make the resulting code more SSA-like - * and therefore make it easier to move instructions around. - * This is of crucial importance for R300 fragment programs, where de-aliasing - * can help to reduce texture indirections, but other targets can benefit from - * it as well. - * - * \note When compiling GLSL, there may be some benefit gained from breaking - * up vectors whose components are unrelated. This is not done yet and should - * be investigated at some point (of course, a matching pass to re-merge - * components would be required). - */ -void rc_dataflow_dealias(struct radeon_compiler * c) -{ - struct dealias_state s; - - memset(&s, 0, sizeof(s)); - s.C = c; - - struct rc_instruction * inst; - for(inst = c->Program.Instructions.Prev; inst != &c->Program.Instructions; inst = inst->Prev) { - if (!inst->Dataflow.DstRegAliased || inst->Dataflow.DstReg->File != RC_FILE_TEMPORARY) - continue; - - if (inst->Dataflow.DstReg->UseMask & ~inst->I.DstReg.WriteMask) - continue; - - s.OldIndex = inst->I.DstReg.Index; - s.NewIndex = rc_find_free_temporary(c); - s.DealiasFail = 0; - s.Length = 0; - - inst->Dataflow.DstRegAliased = 0; - if (inst->Dataflow.DstRegPrev) { - rc_dataflow_remove_ref(inst->Dataflow.DstRegPrev); - inst->Dataflow.DstRegPrev = 0; - } - - push_dealias_vector(&s, inst->Dataflow.DstReg); - run_dealias(&s); - } -} |