MIPS: assume at as source/dest of MSA copy/insert instructions
commit f23ce3883a30743a5b779dc6fb90ca8620688a23 upstream.
Assuming at ($1) as the source or destination register of copy or
insert instructions:
- Simplifies the macros providing those instructions for toolchains
without MSA support.
- Avoids an unnecessary move instruction when at is used as the source
or destination register anyway.
- Is sufficient for the uses to be introduced in the kernel by a
subsequent patch.
Note that due to a patch ordering snafu on my part this also fixes the
currently broken build with MSA support enabled. The build has been
broken since commit c9017757c532 "MIPS: init upper 64b of vector
registers when MSA is first used", which this patch should have
preceeded.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9161/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
1 file changed
