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pan/bi: Add bi_swizzle enum

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We need to represent subword swizzles at a somewhat higher level than
the hardware.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8215>
This commit is contained in:
Alyssa Rosenzweig 2020-12-21 17:10:10 -05:00
parent d93995fd2b
commit f9cd6f0500
1 changed files with 31 additions and 0 deletions
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31
src/panfrost/bifrost/compiler.h
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@ -360,6 +360,37 @@ typedef struct {
};
} bi_instruction;
/* Swizzles across bytes in a 32-bit word. Expresses swz in the XML directly.
* To express widen, use the correpsonding replicated form, i.e. H01 = identity
* for widen = none, H00 for widen = h0, B1111 for widen = b1. For lane, also
* use the replicated form (interpretation is governed by the opcode). For
* 8-bit lanes with two channels, use replicated forms for replicated forms
* (TODO: what about others?). For 8-bit lanes with four channels using
* matching form (TODO: what about others?).
*/
enum bi_swizzle {
/* 16-bit swizzle ordering deliberate for fast compute */
BI_SWIZZLE_H00 = 0, /* = B0101 */
BI_SWIZZLE_H01 = 1, /* = B0123 = W0 */
BI_SWIZZLE_H10 = 2, /* = B2301 */
BI_SWIZZLE_H11 = 3, /* = B2323 */
/* replication order should be maintained for fast compute */
BI_SWIZZLE_B0000 = 4, /* single channel (replicate) */
BI_SWIZZLE_B1111 = 5,
BI_SWIZZLE_B2222 = 6,
BI_SWIZZLE_B3333 = 7,
/* totally special for explicit pattern matching */
BI_SWIZZLE_B0011 = 8, /* +SWZ.v4i8 */
BI_SWIZZLE_B2233 = 9, /* +SWZ.v4i8 */
BI_SWIZZLE_B1032 = 10, /* +SWZ.v4i8 */
BI_SWIZZLE_B3210 = 11, /* +SWZ.v4i8 */
BI_SWIZZLE_B0022 = 12, /* for b02 lanes */
};
/* Represents the assignment of slots for a given bi_bundle */
typedef struct {