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Diffstat (limited to 'rts/gmp/mpz/com.c')
-rw-r--r-- | rts/gmp/mpz/com.c | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/rts/gmp/mpz/com.c b/rts/gmp/mpz/com.c deleted file mode 100644 index 18d6427779..0000000000 --- a/rts/gmp/mpz/com.c +++ /dev/null @@ -1,93 +0,0 @@ -/* mpz_com(mpz_ptr dst, mpz_ptr src) -- Assign the bit-complemented value of - SRC to DST. - -Copyright (C) 1991, 1993, 1994, 1996 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 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 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 Lesser General Public -License for more details. - -You should have received a copy of the GNU Lesser General Public License -along with the GNU MP Library; see the file COPYING.LIB. If not, write to -the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, -MA 02111-1307, USA. */ - -#include "gmp.h" -#include "gmp-impl.h" - -void -#if __STDC__ -mpz_com (mpz_ptr dst, mpz_srcptr src) -#else -mpz_com (dst, src) - mpz_ptr dst; - mpz_srcptr src; -#endif -{ - mp_size_t size = src->_mp_size; - mp_srcptr src_ptr; - mp_ptr dst_ptr; - - if (size >= 0) - { - /* As with infinite precision: one's complement, two's complement. - But this can be simplified using the identity -x = ~x + 1. - So we're going to compute (~~x) + 1 = x + 1! */ - - if (dst->_mp_alloc < size + 1) - _mpz_realloc (dst, size + 1); - - src_ptr = src->_mp_d; - dst_ptr = dst->_mp_d; - - if (size == 0) - { - /* Special case, as mpn_add wants the first arg's size >= the - second arg's size. */ - dst_ptr[0] = 1; - dst->_mp_size = -1; - return; - } - - { - mp_limb_t cy; - - cy = mpn_add_1 (dst_ptr, src_ptr, size, (mp_limb_t) 1); - if (cy) - { - dst_ptr[size] = cy; - size++; - } - } - - /* Store a negative size, to indicate ones-extension. */ - dst->_mp_size = -size; - } - else - { - /* As with infinite precision: two's complement, then one's complement. - But that can be simplified using the identity -x = ~(x - 1). - So we're going to compute ~~(x - 1) = x - 1! */ - size = -size; - - if (dst->_mp_alloc < size) - _mpz_realloc (dst, size); - - src_ptr = src->_mp_d; - dst_ptr = dst->_mp_d; - - mpn_sub_1 (dst_ptr, src_ptr, size, (mp_limb_t) 1); - size -= dst_ptr[size - 1] == 0; - - /* Store a positive size, to indicate zero-extension. */ - dst->_mp_size = size; - } -} |