Commit 2a4e4477 authored by Alyssa Rosenzweig's avatar Alyssa Rosenzweig 💜 Committed by Marge Bot
Browse files

pan/bi: Add bi_layout.c for clause layout helpers



Figuring out what "shapes" of clauses are kosher happens during
scheduling, not packing, but shouldn't distract the scheduler. So let's
add a new file for these sorts of questions.
Signed-off-by: Alyssa Rosenzweig's avatarAlyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <mesa/mesa!5260>
parent c3de28bb
......@@ -2,6 +2,7 @@ bifrost_FILES := \
bifrost/bifrost.h \
bifrost/bifrost_compile.c \
bifrost/bifrost_compile.h \
bifrost/bi_layout.c \
bifrost/bi_liveness.c \
bifrost/bi_lower_combine.c \
bifrost/bi_tables.c \
......
/*
* Copyright (C) 2020 Collabora, Ltd.
*
* 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 AUTHORS OR COPYRIGHT HOLDERS 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 "compiler.h"
/* The scheduler packs multiple instructions into a clause (grouped as bundle),
* and the packing code takes in a clause and emits it to the wire. During
* scheduling, we need to lay out the instructions (bundles) and constants
* within the clause so constraints can be resolved during scheduling instead
* of failing packing. These routines will help building clauses from
* instructions so the scheduler can focus on the high-level algorithm, and
* manipulating clause layouts.
*/
/* Helper to see if a bundle can be inserted. We must satisfy the invariant:
*
* constant_count + bundle_count <= 13
*
* ...which is equivalent to the clause ending up with 8 or fewer quardwords.
* Inserting a bundle increases bundle_count by one, and if it reads a unique
* constant, it increases constant_count by one.
*/
bool
bi_can_insert_bundle(bi_clause *clause, bool constant)
{
unsigned constant_count = clause->constant_count + (constant ? 1 : 0);
unsigned bundle_count = clause->bundle_count + 1;
return (constant_count + bundle_count) <= 13;
}
......@@ -581,6 +581,10 @@ void bi_liveness_ins_update(uint16_t *live, bi_instruction *ins, unsigned max);
void bi_invalidate_liveness(bi_context *ctx);
bool bi_is_live_after(bi_context *ctx, bi_block *block, bi_instruction *start, int src);
/* Layout */
bool bi_can_insert_bundle(bi_clause *clause, bool constant);
/* Code emit */
void bi_pack(bi_context *ctx, struct util_dynarray *emission);
......
......@@ -21,6 +21,7 @@
libpanfrost_bifrost_files = files(
'disassemble.c',
'bi_layout.c',
'bi_liveness.c',
'bi_lower_combine.c',
'bi_print.c',
......
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