https://sourceware.org/bugzilla/show_bug.cgi?id=20666
Bug ID: 20666
Summary: [libopcodes][Aarch64] BFI instruction decoded as bad
BFC instruction
Product: binutils
Version: 2.26
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: njholcomb at wi dot rr.com
Target Milestone: ---
Decoding an A64 base instruction with bytes: 0x331957fa should produce a bit
field insert of the zero register:
bfi w26, wzr, #7, #22
The current output is a BFC instruction (which already cannot be encoded in the
A64 base instruction):
bfc w26, #7, #22
This instruction is incorrect because the BFC instruction only supports 4 bits
of register name, meaning w26 is out of bounds as a register for this
instruction.
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