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| author |   Roland McGrath <roland@gnu.org> | 1995-02-18 01:27:10 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 1995-02-18 01:27:10 +0000 |
| commit | 28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch) | |
| tree | 15f07c4c43d635959c6afee96bde71fb1b3614ee /sysdeps/rs6000 | |
| download | glibc-28f540f45bbacd939bfd07f213bcad2bf730b1bf.tar.gz glibc-28f540f45bbacd939bfd07f213bcad2bf730b1bf.tar.bz2 glibc-28f540f45bbacd939bfd07f213bcad2bf730b1bf.zip | |
initial import
Diffstat (limited to 'sysdeps/rs6000')
| -rw-r--r-- | sysdeps/rs6000/ffs.c | 39 | ||||
| -rw-r--r-- | sysdeps/rs6000/memcopy.h | 86 |
2 files changed, 125 insertions, 0 deletions
diff --git a/sysdeps/rs6000/ffs.c b/sysdeps/rs6000/ffs.c new file mode 100644 index 0000000000..44e7a434d2 --- /dev/null +++ b/sysdeps/rs6000/ffs.c @@ -0,0 +1,39 @@ +/* ffs -- find first set bit in a word, counted from least significant end. + For IBM rs6000. + Copyright (C) 1991, 1992 Free Software Foundation, Inc. + Contributed by Torbjorn Granlund (tege@sics.se). + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <ansidecl.h> +#include <bstring.h> + +#undef ffs + +#ifdef __GNUC__ + +int +DEFUN(ffs, (x), int x) +{ + int cnt; + + asm ("cntlz %0,%1" : "=r" (cnt) : "r" (x & -x)); + return 32 - cnt; +} + +#else +#include <sysdeps/generic/ffs.c> +#endif diff --git a/sysdeps/rs6000/memcopy.h b/sysdeps/rs6000/memcopy.h new file mode 100644 index 0000000000..873b31200b --- /dev/null +++ b/sysdeps/rs6000/memcopy.h @@ -0,0 +1,86 @@ +/* Copyright (C) 1991 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 Library General Public License as +published by the Free Software Foundation; either version 2 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <sysdeps/generic/memcopy.h> + +#undef OP_T_THRES +#define OP_T_THRES 32 + +#undef BYTE_COPY_FWD +#define BYTE_COPY_FWD(dst_bp, src_bp, nbytes) \ + do \ + { \ + size_t __nbytes = nbytes; \ + asm volatile("mtspr 1,%2\n" \ + "lsx 6,0,%1\n" \ + "stsx 6,0,%0" : /* No outputs. */ : \ + "b" (dst_bp), "b" (src_bp), "r" (__nbytes) : \ + "6", "7", "8", "9", "10", "11", "12", "13"); \ + dst_bp += __nbytes; \ + src_bp += __nbytes; \ + } while (0) + +#undef BYTE_COPY_BWD +#define BYTE_COPY_BWD(dst_ep, src_ep, nbytes) \ + do \ + { \ + size_t __nbytes = (nbytes); \ + dst_ep -= __nbytes; \ + src_ep -= __nbytes; \ + asm volatile("mtspr 1,%2\n" \ + "lsx 6,0,%1\n" \ + "stsx 6,0,%0" : /* No outputs. */ : \ + "b" (dst_ep), "b" (src_ep), "r" (__nbytes) : \ + "6", "7", "8", "9", "10", "11", "12", "13"); \ + } while (0) + +#undef WORD_COPY_FWD +#define WORD_COPY_FWD(dst_bp, src_bp, nbytes_left, nbytes) \ + do \ + { \ + size_t __nblocks = (nbytes) / 32; \ + if (__nblocks != 0) \ + asm volatile("mtctr %4\n" \ + "lsi 6,%1,32\n" \ + "ai %1,%1,32\n" \ + "stsi 6,%0,32\n" \ + "ai %0,%0,32\n" \ + "bdn $-16" : \ + "=b" (dst_bp), "=b" (src_bp) : \ + "0" (dst_bp), "1" (src_bp), "r" (__nblocks) : \ + "6", "7", "8", "9", "10", "11", "12", "13"); \ + (nbytes_left) = (nbytes) % 32; \ + } while (0) + +#undef WORD_COPY_BWD +#define WORD_COPY_BWD(dst_ep, src_ep, nbytes_left, nbytes) \ + do \ + { \ + size_t __nblocks = (nbytes) / 32; \ + if (__nblocks != 0) \ + asm volatile("mtctr %4\n" \ + "ai %1,%1,-32\n" \ + "lsi 6,%1,32\n" \ + "ai %0,%0,-32\n" \ + "stsi 6,%0,32\n" \ + "bdn $-16" : \ + "=b" (dst_ep), "=b" (src_ep) : \ + "0" (dst_ep), "1" (src_ep), "r" (__nblocks) : \ + "6", "7", "8", "9", "10", "11", "12", "13"); \ + (nbytes_left) = (nbytes) % 32; \ + } while (0) |