[PATCH][ARM][gas] Make gas accept vcmp[e].f{32,64} <reg>, #0.0

[Kyrill Tkachov]

Hi all,

The ARM ARM says that the VFP compare with zero instructions (vcmp, 
vcmpe) accept the zero in the form of a #0.0 immediate. However, gas 
currently only accepts #0. This patch fixes that and some simple tests 
are added.

The new parse_ifimm_zerofunction is rather simple and is modelled on the 
parse_qfloat_immediate below it and didn't blow up in my testing.


make check on gas passes and a gcc testsuite run doesn't show any problems.

Ok for trunk?

Thanks,
Kyrill

[gas/]
2014-06-24  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

     * config/tc-arm.c (parse_ifimm_zero): New function.
     (enum operand_parse_code): Add OP_RSVD_FI0 value.
     (parse_operands): Handle OP_RSVD_FI0.
     (asm_opcode_insns): Use RSVD_FI0 for second operand of vcmp, vcmpe.

[gas/testsuite/]
2014-06-24  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

     * gas/arm/ual-vcmp.s: New file.
     * gas/arm/ual-vcmp.d: Likewise.
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