diff options
| author | Roger Sayle <roger@nextmovesoftware.com> | 2022-07-18 07:36:13 +0100 |
|---|---|---|
| committer | Roger Sayle <roger@nextmovesoftware.com> | 2022-07-18 07:36:13 +0100 |
| commit | f9da2663f500f473f6ae309e3349a65e6f02001b (patch) | |
| tree | 91ced4d16705e611d473066a8105cccd5b687290 /gcc/tree-cfg.cc | |
| parent | 6d7071776e039d9eedf468636dcd942cb4621199 (diff) | |
| download | gcc-f9da2663f500f473f6ae309e3349a65e6f02001b.zip gcc-f9da2663f500f473f6ae309e3349a65e6f02001b.tar.gz gcc-f9da2663f500f473f6ae309e3349a65e6f02001b.tar.bz2 | |
Add UNSPEC_MASKOP to kupck<mode> instructions in sse.md on x86.
This AVX512 specific patch to sse.md is split out from an earlier patch:
https://gcc.gnu.org/pipermail/gcc-patches/2022-June/596199.html
The new splitters proposed in that patch interfere with AVX512's
kunpckdq instruction which is defined as identical RTL,
DW:DI = (HI:SI<<32)|zero_extend(LO:SI). To distinguish these,
and avoid AVX512 mask registers accidentally being (ab)used by reload
to perform SImode scalar shifts, this patch adds the explicit
(unspec UNSPEC_MASKOP) to the unpack mask operations, which matches
what sse.md does for the other mask specific (logic) operations.
2022-07-18 Roger Sayle <roger@nextmovesoftware.com>
gcc/ChangeLog
* config/i386/sse.md (kunpckhi): Add UNSPEC_MASKOP unspec.
(kunpcksi): Likewise, add UNSPEC_MASKOP unspec.
(kunpckdi): Likewise, add UNSPEC_MASKOP unspec.
(vec_pack_trunc_qi): Update to specify the now required
UNSPEC_MASKOP unspec.
(vec_pack_trunc_<mode>): Likewise.
Diffstat (limited to 'gcc/tree-cfg.cc')
0 files changed, 0 insertions, 0 deletions