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riscv: Use sqrt{f} builtin

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Checked with a build for riscv64-linux-gnu-rv64imac-lp64 (no
builtin support), riscv64-linux-gnu-rv64imafdc-lp64, and
riscv64-linux-gnu-rv64imafdc-lp64d.
This commit is contained in:
Adhemerval Zanella 2020-06-05 14:44:44 +00:00
parent 3ca05a8e9e
commit 9dbb3fdfb7
3 changed files with 4 additions and 56 deletions
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28
sysdeps/riscv/rvd/e_sqrt.c
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@ -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)

4
sysdeps/riscv/rvd/math-use-builtins-sqrt.h Normal file
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@ -0,0 +1,4 @@
#define USE_SQRT_BUILTIN 1
#define USE_SQRTF_BUILTIN 1
#define USE_SQRTL_BUILTIN 0
#define USE_SQRTF128_BUILTIN 0

28
sysdeps/riscv/rvf/e_sqrtf.c
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@ -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)