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author | Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com> | 2017-06-23 10:43:31 +0530 |
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committer | Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com> | 2017-06-23 10:43:31 +0530 |
commit | 001b09a6a2176b22bd7524a8329950c1ef98f06f (patch) | |
tree | 7db5befcb336b2036b8c6bfba54554b172c01e6b /sysdeps/powerpc/powerpc64/fpu/multiarch/s_llroundf.c | |
parent | c271ff9469dd55896c5110194bb3668e4ddb2708 (diff) | |
download | glibc-001b09a6a2176b22bd7524a8329950c1ef98f06f.tar.gz glibc-001b09a6a2176b22bd7524a8329950c1ef98f06f.tar.xz glibc-001b09a6a2176b22bd7524a8329950c1ef98f06f.zip |
powerpc: Add optimized version of [l]lroundf
This patch makes use of optimized double version of llround for single precision as both the versions return [long] long type.
Diffstat (limited to 'sysdeps/powerpc/powerpc64/fpu/multiarch/s_llroundf.c')
-rw-r--r-- | sysdeps/powerpc/powerpc64/fpu/multiarch/s_llroundf.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_llroundf.c b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_llroundf.c new file mode 100644 index 0000000000..1e34b5dbc8 --- /dev/null +++ b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_llroundf.c @@ -0,0 +1,46 @@ +/* Multiple versions of llroundf. + Copyright (C) 2017 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/>. */ +/* Redefine lroundf/__lroundf so that the compiler won't complain about + the type mismatch with the IFUNC selector in strong_alias below. */ +#define lroundf __hidden_lroundf +#define __lroundf __hidden___lroundf + +#include <math.h> +#undef lroundf +#undef __lroundf +#include "init-arch.h" + +extern __typeof (__llroundf) __llroundf_ppc64 attribute_hidden; +extern __typeof (__llroundf) __llround_power6x attribute_hidden; +extern __typeof (__llroundf) __llround_power8 attribute_hidden; + +/* The ppc64 ABI passes float and double parameters in 64bit floating point + registers (at least up to a point) as IEEE binary64 format, so effectively + of "double" type. Both l[l]round and l[l]roundf return long type. So these + functions have identical signatures and functionality, and can use a + single implementation. */ +libc_ifunc (__llroundf, + (hwcap2 & PPC_FEATURE2_ARCH_2_07) + ? __llround_power8 : + (hwcap & PPC_FEATURE_POWER6_EXT) + ? __llround_power6x + : __llroundf_ppc64); + +weak_alias (__llroundf, llroundf) +strong_alias (__llroundf, __lroundf) +weak_alias (__lroundf, lroundf) |