[klibc] [PATCH] mips/setjmp.S don't save and restore float point registers

[YunQiang Su]

Any idea about it?
It may be a serious problem, as some distributions are using FPXX by default.

On Sat, Sep 5, 2015 at 9:39 PM, YunQiang Su <wzssyqa at gmail.com> wrote:
> Klibc FTBFS with '-mno-odd-spreg' on mips32(el) platforms,
> As it try to save/restore odd-number FPR.
>
> Indeed no other architectures save/restore FPR at all.
> It shouldn't be needed.
> ---
>  usr/klibc/arch/mips/setjmp.S | 24 ------------------------
>  1 file changed, 24 deletions(-)
>
> diff --git a/usr/klibc/arch/mips/setjmp.S b/usr/klibc/arch/mips/setjmp.S
> index 68eed19..21e4115 100644
> --- a/usr/klibc/arch/mips/setjmp.S
> +++ b/usr/klibc/arch/mips/setjmp.S
> @@ -29,18 +29,6 @@ LEAF(setjmp)
>         sw      s8, 40(a0)
>         sw      ra, 44(a0)
>         cfc1    t0,$31
> -       swc1    $f20,48(a0)
> -       swc1    $f21,52(a0)
> -       swc1    $f22,56(a0)
> -       swc1    $f23,60(a0)
> -       swc1    $f24,64(a0)
> -       swc1    $f25,68(a0)
> -       swc1    $f26,72(a0)
> -       swc1    $f27,76(a0)
> -       swc1    $f28,80(a0)
> -       swc1    $f29,84(a0)
> -       swc1    $f30,88(a0)
> -       swc1    $f31,92(a0)
>         sw      t0,96(a0)
>         move    v0,zero
>         jr      ra
> @@ -61,18 +49,6 @@ LEAF(longjmp)
>         lw      s8, 40(a0)
>         lw      ra, 44(a0)
>         lw      t0, 96(a0)
> -       lwc1    $f20,48(a0)
> -       lwc1    $f21,52(a0)
> -       lwc1    $f22,56(a0)
> -       lwc1    $f23,60(a0)
> -       lwc1    $f24,64(a0)
> -       lwc1    $f25,68(a0)
> -       lwc1    $f26,72(a0)
> -       lwc1    $f27,76(a0)
> -       lwc1    $f28,80(a0)
> -       lwc1    $f29,84(a0)
> -       lwc1    $f30,88(a0)
> -       lwc1    $f31,92(a0)
>         ctc1    t0,$31
>         move    v0,a1
>         jr      ra
> --
> 2.5.0
>