=================================================================== RCS file: /home/cvs/OpenXM_contrib/gmp/mpz/Attic/cdiv_ui.c,v retrieving revision 1.1.1.2 retrieving revision 1.1.1.3 diff -u -p -r1.1.1.2 -r1.1.1.3 --- OpenXM_contrib/gmp/mpz/Attic/cdiv_ui.c 2000/09/09 14:12:49 1.1.1.2 +++ OpenXM_contrib/gmp/mpz/Attic/cdiv_ui.c 2003/08/25 16:06:32 1.1.1.3 @@ -3,7 +3,7 @@ always fit into the return type, the negative of the true remainder is returned. -Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc. +Copyright 1994, 1995, 1996, 2001, 2002 Free Software Foundation, Inc. This file is part of the GNU MP Library. @@ -26,25 +26,68 @@ MA 02111-1307, USA. */ #include "gmp-impl.h" unsigned long int -#if __STDC__ mpz_cdiv_ui (mpz_srcptr dividend, unsigned long int divisor) -#else -mpz_cdiv_ui (dividend, divisor) - mpz_srcptr dividend; - unsigned long int divisor; -#endif { - mp_size_t dividend_size; - mp_size_t size; - mp_limb_t remainder_limb; + mp_size_t ns, nn; + mp_ptr np; + mp_limb_t rl; - dividend_size = dividend->_mp_size; - size = ABS (dividend_size); + if (divisor == 0) + DIVIDE_BY_ZERO; - remainder_limb = mpn_mod_1 (dividend->_mp_d, size, (mp_limb_t) divisor); + ns = SIZ(dividend); + if (ns == 0) + { + return 0; + } - if (remainder_limb != 0 && dividend_size >= 0) - remainder_limb = divisor - remainder_limb; + nn = ABS(ns); + np = PTR(dividend); +#if GMP_NAIL_BITS != 0 + if (divisor > GMP_NUMB_MAX) + { + mp_limb_t dp[2], rp[2]; + mp_ptr qp; + mp_size_t rn; + TMP_DECL (mark); - return remainder_limb; + if (nn == 1) /* tdiv_qr requirements; tested above for 0 */ + { + rl = np[0]; + rp[0] = rl; + } + else + { + TMP_MARK (mark); + dp[0] = divisor & GMP_NUMB_MASK; + dp[1] = divisor >> GMP_NUMB_BITS; + qp = TMP_ALLOC_LIMBS (nn - 2 + 1); + mpn_tdiv_qr (qp, rp, (mp_size_t) 0, np, nn, dp, (mp_size_t) 2); + TMP_FREE (mark); + rl = rp[0] + (rp[1] << GMP_NUMB_BITS); + } + + if (rl != 0 && ns >= 0) + { + rl = divisor - rl; + rp[0] = rl & GMP_NUMB_MASK; + rp[1] = rl >> GMP_NUMB_BITS; + } + + rn = 1 + (rl > GMP_NUMB_MAX); rn -= (rp[rn - 1] == 0); + } + else +#endif + { + rl = mpn_mod_1 (np, nn, (mp_limb_t) divisor); + if (rl == 0) + ; + else + { + if (ns >= 0) + rl = divisor - rl; + } + } + + return rl; }