[Bug gas/28436] New: ARM: too few registers allowed for vpush/vpop with single precision registers

[markus.klein at sma dot de]

https://sourceware.org/bugzilla/show_bug.cgi?id=28436

            Bug ID: 28436
           Summary: ARM: too few registers allowed for vpush/vpop with
                    single precision registers
           Product: binutils
           Version: 2.36.1
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: markus.klein at sma dot de
  Target Milestone: ---

Created attachment 13717
  --> https://sourceware.org/bugzilla/attachment.cgi?id=13717&action=edit
vpush and vpop with S registers

vpush and vpop with S registers

vpush and vpop checks that no more than 16 registers are given for these
instructions. Only for D registers this limit is correct, for S registers 32
registers are allowed.

Attached test file.

as -march=armv7-a -mfpu=neon vpushExample.S && objdump a.out

should allow the following instructions

vpush {s0-s31}          // -> false error, is a valid command
vpush {s0-s15}          // OK
vpop {s0-s15}           // OK
vpop {s0-s31}           // -> false error, is a valid command

but returns the following error:

register list must contain at least 1 and at most 16 registers -- `vpush
{s0-s31}
register list must contain at least 1 and at most 16 registers -- `vpop
{s0-s31}



This behavior was introduced with Bug 20429

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