[PATCH 05/13] x86_64: Use builtin sqrt{f,l}

[Adhemerval Zanella]

If no one opposes I will commit this.

On 09/06/2020 18:32, Adhemerval Zanella wrote:
> Checked on x86_64-linux-gnu.
> ---
>  sysdeps/x86_64/fpu/e_sqrt.c                 | 32 ---------------------
>  sysdeps/x86_64/fpu/e_sqrtf.c                | 32 ---------------------
>  sysdeps/x86_64/fpu/e_sqrtl.c                | 28 +++++++++++++++++-
>  sysdeps/x86_64/fpu/math-use-builtins-sqrt.h |  4 +++
>  4 files changed, 31 insertions(+), 65 deletions(-)
>  delete mode 100644 sysdeps/x86_64/fpu/e_sqrt.c
>  delete mode 100644 sysdeps/x86_64/fpu/e_sqrtf.c
>  create mode 100644 sysdeps/x86_64/fpu/math-use-builtins-sqrt.h
> 
> diff --git a/sysdeps/x86_64/fpu/e_sqrt.c b/sysdeps/x86_64/fpu/e_sqrt.c
> deleted file mode 100644
> index c1708f9b65..0000000000
> --- a/sysdeps/x86_64/fpu/e_sqrt.c
> +++ /dev/null
> @@ -1,32 +0,0 @@
> -/* Square root of floating point number.
> -   Copyright (C) 2002-2020 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 <math_private.h>
> -#include <libm-alias-finite.h>
> -
> -#undef __ieee754_sqrt
> -double
> -__ieee754_sqrt (double x)
> -{
> -  double res;
> -
> -  asm ("sqrtsd %1, %0" : "=x" (res) : "xm" (x));
> -
> -  return res;
> -}
> -libm_alias_finite (__ieee754_sqrt, __sqrt)
> diff --git a/sysdeps/x86_64/fpu/e_sqrtf.c b/sysdeps/x86_64/fpu/e_sqrtf.c
> deleted file mode 100644
> index 6155c7be24..0000000000
> --- a/sysdeps/x86_64/fpu/e_sqrtf.c
> +++ /dev/null
> @@ -1,32 +0,0 @@
> -/* Square root of floating point number.
> -   Copyright (C) 2002-2020 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 <math_private.h>
> -#include <libm-alias-finite.h>
> -
> -#undef __ieee754_sqrtf
> -float
> -__ieee754_sqrtf (float x)
> -{
> -  float res;
> -
> -  asm ("sqrtss %1, %0" : "=x" (res) : "xm" (x));
> -
> -  return res;
> -}
> -libm_alias_finite (__ieee754_sqrtf, __sqrtf)
> diff --git a/sysdeps/x86_64/fpu/e_sqrtl.c b/sysdeps/x86_64/fpu/e_sqrtl.c
> index 90e4e164e5..7ea6f52058 100644
> --- a/sysdeps/x86_64/fpu/e_sqrtl.c
> +++ b/sysdeps/x86_64/fpu/e_sqrtl.c
> @@ -1 +1,27 @@
> -#include "sysdeps/i386/fpu/e_sqrtl.c"
> +/* Square root function.  x86_64 long double version.
> +   Copyright (C) 2020 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 <math.h>
> +#include <libm-alias-finite.h>
> +
> +long double
> +__ieee754_sqrtl (long double x)
> +{
> +  return __builtin_sqrtl (x);
> +}
> +libm_alias_finite (__ieee754_sqrtl, __sqrtl)
> diff --git a/sysdeps/x86_64/fpu/math-use-builtins-sqrt.h b/sysdeps/x86_64/fpu/math-use-builtins-sqrt.h
> new file mode 100644
> index 0000000000..e94c915ba6
> --- /dev/null
> +++ b/sysdeps/x86_64/fpu/math-use-builtins-sqrt.h
> @@ -0,0 +1,4 @@
> +#define USE_SQRT_BUILTIN 1
> +#define USE_SQRTF_BUILTIN 1
> +#define USE_SQRTL_BUILTIN 0
> +#define USE_SQRTF128_BUILTIN 0
>