[PATCH] PowerPC - Fix PPC64 floorl

[Andreas Schwab]

Adhemerval Zanella <azanella@linux.vnet.ibm.com> writes:

> The commit 2460d3aa21f04cdf28497683bd3e29183189f779 added some additional tests for powl intended
> to check a correction for i386/x86_64. The tests however started to trigger some issues with powl in
> PPC64. I tracked the issue an it is due the floorl assembly version for PPC64 that fails to correctly
> floor some values large than 2**52. 

This is BZ#13886.

> --- a/sysdeps/ieee754/ldbl-128ibm/s_floorl.c
> +++ b/sysdeps/ieee754/ldbl-128ibm/s_floorl.c
> @@ -27,9 +27,13 @@ long double
>  __floorl (long double x)
>  {
>    double xh, xl, hi, lo;
> +  double two52 = 0x10000000000000LL;
>  
>    ldbl_unpack (x, &xh, &xl);
>  
> +  if (__builtin_expect(__builtin_fabs (x) < two52, 1))

__builtin_fabsl (x) or __builtin_fabs (xh)?

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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