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pan/bi: Document constant count invariant

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constants + instructions <= 13

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5260>
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Alyssa Rosenzweig 2020-05-05 16:15:16 -04:00 • committed by Marge Bot
parent ac64bf9b20
commit a658a4f7a5
1 changed files with 7 additions and 1 deletions
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8
src/panfrost/bifrost/compiler.h
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@ -373,7 +373,13 @@ typedef struct {
/* Corresponds to the usual bit but shifted by a clause */
bool data_register_write_barrier;
/* Constants read by this clause. ISA limit. */
/* Constants read by this clause. ISA limit. Must satisfy:
*
* constant_count + bundle_count <= 13
*
* Also implicitly constant_count <= bundle_count since a bundle only
* reads a single constant.
*/
uint64_t constants[8];
unsigned constant_count;