[11/13] riscv: Use sqrt{f} builtin

  Checked with a build for riscv64-linux-gnu-rv64imac-lp64 (no
builtin support), riscv64-linux-gnu-rv64imafdc-lp64, and
riscv64-linux-gnu-rv64imafdc-lp64d.
---
 sysdeps/riscv/rvd/e_sqrt.c                 | 28 ----------------------
 sysdeps/riscv/rvd/math-use-builtins-sqrt.h |  4 ++++
 sysdeps/riscv/rvf/e_sqrtf.c                | 28 ----------------------
 3 files changed, 4 insertions(+), 56 deletions(-)
 delete mode 100644 sysdeps/riscv/rvd/e_sqrt.c
 create mode 100644 sysdeps/riscv/rvd/math-use-builtins-sqrt.h
 delete mode 100644 sysdeps/riscv/rvf/e_sqrtf.c
  

If no one opposes I will commit this.

On 09/06/2020 18:32, Adhemerval Zanella wrote:
> Checked with a build for riscv64-linux-gnu-rv64imac-lp64 (no
> builtin support), riscv64-linux-gnu-rv64imafdc-lp64, and
> riscv64-linux-gnu-rv64imafdc-lp64d.
> ---
>  sysdeps/riscv/rvd/e_sqrt.c                 | 28 ----------------------
>  sysdeps/riscv/rvd/math-use-builtins-sqrt.h |  4 ++++
>  sysdeps/riscv/rvf/e_sqrtf.c                | 28 ----------------------
>  3 files changed, 4 insertions(+), 56 deletions(-)
>  delete mode 100644 sysdeps/riscv/rvd/e_sqrt.c
>  create mode 100644 sysdeps/riscv/rvd/math-use-builtins-sqrt.h
>  delete mode 100644 sysdeps/riscv/rvf/e_sqrtf.c
> 
> diff --git a/sysdeps/riscv/rvd/e_sqrt.c b/sysdeps/riscv/rvd/e_sqrt.c
> deleted file mode 100644
> index 7defcb5785..0000000000
> --- a/sysdeps/riscv/rvd/e_sqrt.c
> +++ /dev/null
> @@ -1,28 +0,0 @@
> -/* Double precision floating point square root.  RISC-V version.
> -   Copyright (C) 2017-2020 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>
> -
> -double
> -__ieee754_sqrt (double x)
> -{
> -  asm ("fsqrt.d %0, %1" : "=f" (x) : "f" (x));
> -  return x;
> -}
> -libm_alias_finite (__ieee754_sqrt, __sqrt)
> diff --git a/sysdeps/riscv/rvd/math-use-builtins-sqrt.h b/sysdeps/riscv/rvd/math-use-builtins-sqrt.h
> new file mode 100644
> index 0000000000..e94c915ba6
> --- /dev/null
> +++ b/sysdeps/riscv/rvd/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
> diff --git a/sysdeps/riscv/rvf/e_sqrtf.c b/sysdeps/riscv/rvf/e_sqrtf.c
> deleted file mode 100644
> index 04835e3e53..0000000000
> --- a/sysdeps/riscv/rvf/e_sqrtf.c
> +++ /dev/null
> @@ -1,28 +0,0 @@
> -/* Single precision floating point square root.  RISC-V version.
> -   Copyright (C) 2017-2020 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>
> -
> -float
> -__ieee754_sqrtf (float x)
> -{
> -  asm ("fsqrt.s %0, %1" : "=f" (x) : "f" (x));
> -  return x;
> -}
> -libm_alias_finite (__ieee754_sqrtf, __sqrtf)
>