[PATCH] D62668: [ARM] First MVE instructions: scalar shifts.
Simon Tatham via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu May 30 08:20:02 PDT 2019
simon_tatham created this revision.
simon_tatham added reviewers: dmgreen, samparker, SjoerdMeijer, t.p.northover.
Herald added subscribers: llvm-commits, hiraditya, kristof.beyls, javed.absar.
Herald added a project: LLVM.
This introduces a new decoding table for MVE instructions, and starts
by adding the family of scalar shift instructions that are part of the
MVE architecture extension: saturating shifts within a single GPR, and
long shifts across a pair of GPRs (both saturating and normal).
Some of these shift instructions have only 3-bit register fields in
the encoding, with the low bit fixed. So they can only address an odd
or even numbered GPR (depending on the operand), and therefore I add
two new register classes, GPREven and GPROdd.
rG LLVM Github Monorepo
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