[testsuite] skip ARM neon-fp16 tests for other -mcpu values

[Joseph S. Myers]

On Tue, 7 Jun 2011, Janis Johnson wrote:

> These tests fail when multilib options use -mfpu=xxxx and override the
> -mfpu=neon-fp16 used for the test:
> 
>   g++.dg/ext/arm-fp16/arm-fp16-ops-5.C
>   g++.dg/ext/arm-fp16/arm-fp16-ops-6.C
>   gcc.dg/torture/arm-fp16-ops-5.c
>   gcc.dg/torture/arm-fp16-ops-6.c
>   gcc.target/arm/fp16-compile-vcvt.c
> 
> The option -mfpu-neon-fp16 is added via "dg-add-options arm_neon_fp16"
> after an earlier "dg-require-effective-target arm_neon_fp16_ok".
> This patch modifies check_effective_target_arm_neon_fp16_ok_nocache to
> return 0 (causing the test to be skipped) if multilib flags include
> -mfpu= with a value other than neon-fp16.

But I'd think they ought to work with any -mfpu= option supporting 
half-precision instructions - that is, vfpv3-fp16, vfpv3-d16-fp16, 
vfpv3xd-fp16, neon-fp16, vfpv4, vfpv4-d16, fpv4-sp-d16, neon-vfpv4 
(anything with "true" in the last field in arm-fpus.def; for the 
testsuite, you can probably suppose anything -mfpu=*fp16*, 
-mfpu=*fpv[4-9]*, -mfpu=*fpv[1-9][0-9]*).

-- 
Joseph S. Myers
joseph@codesourcery.com