Ben Clayton 7103f51603 writer/msl: Fix swizzling on packed vectors
Metal 1.x does not support swizzling on packed_vec types.
Use array-index for single element selection (permitted on LHS and RHS of assignment)
Cast the packed_vec to a vec for multiple element swizzles (not permitted as the LHS of an assignment).

Fixed: tint:1249
Change-Id: I70cbb0c22a935b06b3905d24484bdc2edfb95fc2
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/67060
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Ben Clayton <bclayton@google.com>
Reviewed-by: James Price <jrprice@google.com>
2021-10-20 16:12:33 +00:00
..
2021-07-13 16:41:56 +00:00
2021-07-06 10:20:19 +00:00
2021-07-08 12:00:31 +00:00
2021-07-06 10:20:19 +00:00
2021-06-16 09:50:11 +00:00
2021-06-19 17:34:35 +00:00
2021-07-02 22:17:25 +00:00
2021-07-02 22:17:25 +00:00
2021-07-02 22:17:25 +00:00
2021-07-15 22:36:44 +00:00
2021-07-14 18:01:36 +00:00
2021-07-15 20:29:09 +00:00