[PATCH v2 06/14] LoongArch: Generic <math.h> and soft-fp Routines

[Adhemerval Zanella]

On 31/12/2021 03:44, caiyinyu wrote:
> diff --git a/sysdeps/loongarch/e_sqrtl.c b/sysdeps/loongarch/e_sqrtl.c
> new file mode 100644
> index 0000000000..cbc5802f74
> --- /dev/null
> +++ b/sysdeps/loongarch/e_sqrtl.c
> @@ -0,0 +1,38 @@
> +/* long double square root in software floating-point emulation.
> +   Copyright (C) 2021 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library.  If not, see
> +   <https://www.gnu.org/licenses/>.  */
> +
> +#include <stdlib.h>
> +#include <soft-fp/soft-fp.h>
> +#include <soft-fp/quad.h>
> +
> +long double
> +__ieee754_sqrtl (const long double a)
> +{
> +  FP_DECL_EX;
> +  FP_DECL_Q (A);
> +  FP_DECL_Q (C);
> +  long double c;
> +
> +  FP_INIT_ROUNDMODE;
> +  FP_UNPACK_Q (A, a);
> +  FP_SQRT_Q (C, A);
> +  FP_PACK_Q (c, C);
> +  FP_HANDLE_EXCEPTIONS;
> +  return c;
> +}
> +strong_alias (__ieee754_sqrtl, __sqrtl_finite)

Use libm_alias_finite, the finite alias are deprecated and only provided 
as compat symbols.

This is being replicated already on aarch64 and mips64, maybe we could
add on a generic folder and use it instead.