diff options
Diffstat (limited to 'sysdeps/generic/add_1.c')
-rw-r--r-- | sysdeps/generic/add_1.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/sysdeps/generic/add_1.c b/sysdeps/generic/add_1.c new file mode 100644 index 0000000..7b1c697 --- /dev/null +++ b/sysdeps/generic/add_1.c @@ -0,0 +1,61 @@ +/* mpn_add_1 -- + +Copyright (C) 1993, 1994 Free Software Foundation, Inc. + +This file is part of the GNU MP Library. + +The GNU MP 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 MP 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 MP Library; see the file COPYING.LIB. If not, write to +the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#define __mpn_add_1 __noname +#include "gmp.h" +#undef __mpn_add_1 + +#include "gmp-impl.h" + +mp_limb +__mpn_add_1 (res_ptr, s1_ptr, s1_size, s2_limb) + register mp_ptr res_ptr; + register mp_srcptr s1_ptr; + register mp_size_t s1_size; + register mp_limb s2_limb; +{ + register mp_limb x; + + x = *s1_ptr++; + s2_limb = x + s2_limb; + *res_ptr++ = s2_limb; + if (s2_limb < x) + { + while (--s1_size != 0) + { + x = *s1_ptr++ + 1; + *res_ptr++ = x; + if (x != 0) + goto fin; + } + + return 1; + } + + fin: + if (res_ptr != s1_ptr) + { + mp_size_t i; + for (i = 0; i < s1_size - 1; i++) + res_ptr[i] = s1_ptr[i]; + } + + return 0; +} |