[PATCH][ARM][GAS] Diagnose when trying to assemble conditional FP16 vmovx and vins

[Andre Vieira (lists)]

Hi,

This patch makes GAS emit a warning when trying to assemble the Armv8.2
FP16 instructions VMOVX and VINS with condition codes. The Armv8-A
Reference Manual specifies these instructions without conditional codes
and says that if they are found in an IT block that they are CONSTRAINED
UNPREDICABLE.

Tested by running make check for arm-none-eabi.

Is it OK for master branch?

gas/ChangeLog:
2018-02-21  Andre Vieira  <andre.simoesdiasvieira@arm.com>

        * config/tc-arm.c (do_neon_movhf): If conditional error out when
in arm
        mode and emit warning in thumb mode.
        * testsuite/gas/arm/armv8-2-fp16-scalar-bad.s: Add new tests.
        * testsuite/gas/arm/armv8-2-fp16-scalar-bad.l: Idem.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: fp16.patch
Type: text/x-patch
Size: 46890 bytes
Desc: not available
URL: <https://sourceware.org/pipermail/binutils/attachments/20180221/d21ec0ec/attachment.bin>