tree c4efb41d47abe8e58dde819b243636f3db1cab56
parent d7c53a91c2c11439429bbd50bb1d0a202c553a47
author Sam Elliott <quic_aelliott@quicinc.com> 1743122606 -0700
committer GitHub <noreply@github.com> 1743122606 -0700
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 =+onL
 -----END PGP SIGNATURE-----
 

[RISCV][Xqccmp] Correctly Parse/Disassemble pushfp (#133188)

In the `qc.cm.pushfp` instruction, it is like `cm.pushfp` except in one
important way - `qc.cm.pushfp {ra}, -N*16` is not a valid encoding,
because this would update `s0`/`fp`/`x8` without saving it.

This change now correctly rejects this variant of the instruction, both
during parsing and during disassembly. I also implemented validation for
immediates that represent register lists (both kinds), which may help to
catch bugs in the future.