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pan/bi: Add bi_foreach_instr_in_clause iterators

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These are convenient for post-sched passes, in particular register
allocation. They work by noting the underlying linked list of
instructions in the block must be preserved by scheduling. It isn't
necessary iterate the clause structure directly, it can simply be used
to bound a iteration within the block by recalling clauses are strictly
contained in a single block.

   <alyssa> I don't think I'm enough of a C ninja to write fancy iterator macros yet.
   <zmike> sometimes those can get pretty mind-bendy

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8723>
This commit is contained in:
Alyssa Rosenzweig 2021-01-06 12:22:36 -05:00 • committed by Marge Bot
parent 62239f68b7
commit eca516ebdb
1 changed files with 15 additions and 0 deletions
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15
src/panfrost/bifrost/compiler.h
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@ -807,6 +807,21 @@ bi_last_instr_in_clause(bi_clause *clause)
return bundle.add ?: bundle.fma; return bundle.add ?: bundle.fma;
} }
/* Implemented by expanding bi_foreach_instr_in_block_from(_rev) with the start
* (end) of the clause and adding a condition for the clause boundary */
#define bi_foreach_instr_in_clause(block, clause, pos) \
for (bi_instr *pos = LIST_ENTRY(bi_instr, bi_first_instr_in_clause(clause), link); \
(&pos->link != &(block)->base.instructions) \
&& (pos != bi_next_op(bi_last_instr_in_clause(clause))); \
pos = LIST_ENTRY(bi_instr, pos->link.next, link))
#define bi_foreach_instr_in_clause_rev(block, clause, pos) \
for (bi_instr *pos = LIST_ENTRY(bi_instr, bi_last_instr_in_clause(clause), link); \
(&pos->link != &(block)->base.instructions) \
&& pos != bi_prev_op(bi_first_instr_in_clause(clause)); \
pos = LIST_ENTRY(bi_instr, pos->link.prev, link))
static inline bi_cursor static inline bi_cursor
bi_before_clause(bi_clause *clause) bi_before_clause(bi_clause *clause)
{ {