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pan/bi: Clarify special op scheduling

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They're encoded on ADD but eat the full cycle.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4061>
This commit is contained in:
Alyssa Rosenzweig 2020-03-03 08:16:50 -05:00 • committed by Marge Bot
parent fba1d12742
commit c70a198f24
2 changed files with 5 additions and 1 deletions
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2
src/panfrost/bifrost/bi_tables.c
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@ -47,7 +47,7 @@ unsigned bi_class_props[BI_NUM_CLASSES] = {
[BI_SHIFT] = BI_SCHED_ALL,
[BI_STORE] = BI_SCHED_ADD,
[BI_STORE_VAR] = BI_SCHED_ADD,
[BI_SPECIAL] = BI_SCHED_ALL,
[BI_SPECIAL] = BI_SCHED_ADD | BI_SCHED_SLOW,
[BI_TEX] = BI_SCHED_ADD,
[BI_ROUND] = BI_GENERIC | BI_ROUNDMODE | BI_SCHED_ALL,
};

4
src/panfrost/bifrost/compiler.h
View file

@ -95,6 +95,10 @@ extern unsigned bi_class_props[BI_NUM_CLASSES];
/* Most ALU ops can do either, actually */
#define BI_SCHED_ALL (BI_SCHED_FMA | BI_SCHED_ADD)
/* Along with setting BI_SCHED_ADD, eats up the entire cycle, so FMA must be
* nopped out. Used for _FAST operations. */
#define BI_SCHED_SLOW (1 << 5)
/* It can't get any worse than csel4... can it? */
#define BIR_SRC_COUNT 4