diff options
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | sysdeps/arm/e_sqrt.c | 45 | ||||
| -rw-r--r-- | sysdeps/arm/e_sqrtf.c | 45 |
3 files changed, 96 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index 49436bcf4b..ef710b4194 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,9 @@ +2016-10-20 Joseph Myers <joseph@codesourcery.com> + + [BZ #20660] + * sysdeps/arm/e_sqrt.c: New file. + * sysdeps/arm/e_sqrtf.c: Likewise. + 2016-10-19 Joseph Myers <joseph@codesourcery.com> [BZ #20718] diff --git a/sysdeps/arm/e_sqrt.c b/sysdeps/arm/e_sqrt.c new file mode 100644 index 0000000000..8ba85ed260 --- /dev/null +++ b/sysdeps/arm/e_sqrt.c @@ -0,0 +1,45 @@ +/* Compute square root for double. ARM version. + Copyright (C) 2016 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 + <http://www.gnu.org/licenses/>. */ + +#ifdef __SOFTFP__ + +/* Use architecture-indendent sqrt implementation. */ +# include <sysdeps/ieee754/dbl-64/e_sqrt.c> + +#else + +/* Use VFP square root instruction. */ +# include <math.h> +# include <sysdep.h> + +double +__ieee754_sqrt (double x) +{ + double ret; +# if __ARM_ARCH >= 6 + asm ("vsqrt.f64 %P0, %P1" : "=w" (ret) : "w" (x)); +# else + /* As in GCC, for VFP9 Erratum 760019 avoid overwriting the + input. */ + asm ("vsqrt.f64 %P0, %P1" : "=&w" (ret) : "w" (x)); +# endif + return ret; +} +strong_alias (__ieee754_sqrt, __sqrt_finite) + +#endif diff --git a/sysdeps/arm/e_sqrtf.c b/sysdeps/arm/e_sqrtf.c new file mode 100644 index 0000000000..282f7c3cfb --- /dev/null +++ b/sysdeps/arm/e_sqrtf.c @@ -0,0 +1,45 @@ +/* Compute square root for float. ARM version. + Copyright (C) 2016 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 + <http://www.gnu.org/licenses/>. */ + +#ifdef __SOFTFP__ + +/* Use architecture-indendent sqrtf implementation. */ +# include <sysdeps/ieee754/flt-32/e_sqrtf.c> + +#else + +/* Use VFP square root instruction. */ +# include <math.h> +# include <sysdep.h> + +float +__ieee754_sqrtf (float x) +{ + float ret; +# if __ARM_ARCH >= 6 + asm ("vsqrt.f32 %0, %1" : "=t" (ret) : "t" (x)); +# else + /* As in GCC, for VFP9 Erratum 760019 avoid overwriting the + input. */ + asm ("vsqrt.f32 %0, %1" : "=&t" (ret) : "t" (x)); +# endif + return ret; +} +strong_alias (__ieee754_sqrtf, __sqrtf_finite) + +#endif |