https://llvm.org/bugs/show_bug.cgi?id=30374
Bug ID: 30374
Summary: v8.1a CASP accepts register pairs with non-even low
register (UNALLOCATED according to spec)
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Backend: AArch64
Assignee: unassignedb...@nondot.org
Reporter: ahmed.bouga...@gmail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Stumbled upon this while looking at r281301, which has pairs like "%w19_w20".
>From my reading of DDI0557A.b B11.1.4 "CASP, CASPA, CASPAL, CASPL", that's not
valid:
if Rs<0> == ‘1’ then UNALLOCATED;
if Rt<0> == ‘1’ then UNALLOCATED;
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