[llvm-bugs] [Bug 13803] llvm-mc treats .n suffix as .w suffix for ADC

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=13803

John Brawn <john.brawn.123 at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
                 CC|                            |john.brawn.123 at gmail.com
         Resolution|INVALID                     |---

--- Comment #2 from John Brawn <john.brawn.123 at gmail.com> ---
The syntax for encoding T1 is ADC{S}<c>.W, but the assembler syntax for ADC
(immediate) is

  ADC{S}{<c>}{<q>} {<Rd>,} <Rn>, #<const>

where <q> is .N or .W (page A8-301 of the ARMv7-A/R ARMARM revision C.c).

In the ARMARM the .W suffix is listed in the encoding if it's necessary to
distinguish it from other encodings, but in the assembly syntax it's permitted
even when it's not needed to distinguish between encodings (see section A8.2
"Standard assembler syntax fields").

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