[PATCH] x86_64: Utilize vector math functions w/o -fopenmp

[Torvald Riegel]

On Fri, 2015-12-04 at 20:27 +0300, Andrew Senkevich wrote:
> 2015-12-04 18:46 GMT+03:00 Joseph Myers <joseph@codesourcery.com>:
> diff --git a/sysdeps/x86/fpu/bits/math-vector.h
> b/sysdeps/x86/fpu/bits/math-vector.h
> index f3bfb86..13d720e 100644
> --- a/sysdeps/x86/fpu/bits/math-vector.h
> +++ b/sysdeps/x86/fpu/bits/math-vector.h
> @@ -28,6 +28,12 @@
>  # if defined _OPENMP && _OPENMP >= 201307
>  /* OpenMP case.  */
>  #  define __DECL_SIMD_x86_64 _Pragma ("omp declare simd notinbranch")
> +# elif __GNUC_PREREQ (6,0)
> +/* W/o OpenMP use GCC 6.* __attribute__((__simd__)).  */
> +#  define __DECL_SIMD_x86_64 __attribute__((__simd__("notinbranch")))
> +# endif
> +
> +# ifdef __DECL_SIMD_x86_64
>  #  undef __DECL_SIMD_cos
>  #  define __DECL_SIMD_cos __DECL_SIMD_x86_64
>  #  undef __DECL_SIMD_cosf

I believe this might be what breaks a build on a recent GCC:

../math/bits/mathcalls.h:63:1: error: wrong number of arguments
specified for ‘__simd__’ attribute
 __MATHCALL_VEC (cos,, (_Mdouble_ __x));
 
Or perhaps GCC has a bug.  Could somebody have a look please?