[PATCH] i386: Simplify powl computation for small integral y [BZ #33586]

[Sunil Pandey]

On Sat, Nov 1, 2025 at 8:13 PM H.J. Lu <hjl.tools@gmail.com> wrote:

> On i386, tests added by
>
> commit 1b657c53c21a100082b0855392e4cb40c9c43a87
> Author: Siddhesh Poyarekar <siddhesh@sourceware.org>
> Date:   Fri Oct 10 20:21:13 2025 -0400
>
>     Simplify powl computation for small integral y [BZ #33411]
>
> exposed the same bug in i386 e_powl.S:
>
> FAIL: math/test-float64x-pow
> original exit status 1
> testing _Float64x (without inline functions)
> Failure: pow (0x1p+8192, 0x1p+0): Exception "Overflow" set
> Failure: pow_downward (0x1p+8192, 0x1p+0): Exception "Overflow" set
> Failure: pow_towardzero (0x1p+8192, 0x1p+0): Exception "Overflow" set
> Failure: pow_upward (0x1p+8192, 0x1p+0): Exception "Overflow" set
>
> FAIL: math/test-ldouble-pow
> original exit status 1
> testing long double (without inline functions)
> Failure: pow (0x1p+8192, 0x1p+0): Exception "Overflow" set
> Failure: pow_downward (0x1p+8192, 0x1p+0): Exception "Overflow" set
> Failure: pow_towardzero (0x1p+8192, 0x1p+0): Exception "Overflow" set
> Failure: pow_upward (0x1p+8192, 0x1p+0): Exception "Overflow" set
>
> Port x86-64 e_powl.S fix to i386 e_powl.S.  This fixes BZ #33586.
>
> OK for master?
>

LGTM
Reviewed-by: Sunil K Pandey <skpgkp2@gmail.com>

Thanks,
Sunil


> Thanks.
>
> --
> H.J.
>
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