From 11da511c784eca003deb90c23570f0873954e0de Mon Sep 17 00:00:00 2001 From: Duncan Wilkie Date: Sat, 18 Nov 2023 06:11:09 -0600 Subject: Initial commit. --- gmp-6.3.0/mpn/generic/addmul_1.c | 145 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 145 insertions(+) create mode 100644 gmp-6.3.0/mpn/generic/addmul_1.c (limited to 'gmp-6.3.0/mpn/generic/addmul_1.c') diff --git a/gmp-6.3.0/mpn/generic/addmul_1.c b/gmp-6.3.0/mpn/generic/addmul_1.c new file mode 100644 index 0000000..6140e8e --- /dev/null +++ b/gmp-6.3.0/mpn/generic/addmul_1.c @@ -0,0 +1,145 @@ +/* mpn_addmul_1 -- multiply the N long limb vector pointed to by UP by VL, + add the N least significant limbs of the product to the limb vector + pointed to by RP. Return the most significant limb of the product, + adjusted for carry-out from the addition. + +Copyright 1992-1994, 1996, 2000, 2002, 2004, 2016 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 either: + + * the GNU Lesser General Public License as published by the Free + Software Foundation; either version 3 of the License, or (at your + option) any later version. + +or + + * the GNU General Public License as published by the Free Software + Foundation; either version 2 of the License, or (at your option) any + later version. + +or both in parallel, as here. + +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 General Public License +for more details. + +You should have received copies of the GNU General Public License and the +GNU Lesser General Public License along with the GNU MP Library. If not, +see https://www.gnu.org/licenses/. */ + +#include "gmp-impl.h" +#include "longlong.h" + + +#if GMP_NAIL_BITS == 0 + +mp_limb_t +mpn_addmul_1 (mp_ptr rp, mp_srcptr up, mp_size_t n, mp_limb_t v0) +{ + mp_limb_t u0, crec, c, p1, p0, r0; + + ASSERT (n >= 1); + ASSERT (MPN_SAME_OR_SEPARATE_P (rp, up, n)); + + crec = 0; + do + { + u0 = *up++; + umul_ppmm (p1, p0, u0, v0); + + r0 = *rp; + + p0 = r0 + p0; + c = r0 > p0; + + p1 = p1 + c; + + r0 = p0 + crec; /* cycle 0, 3, ... */ + c = p0 > r0; /* cycle 1, 4, ... */ + + crec = p1 + c; /* cycle 2, 5, ... */ + + *rp++ = r0; + } + while (--n != 0); + + return crec; +} + +#endif + +#if GMP_NAIL_BITS == 1 + +mp_limb_t +mpn_addmul_1 (mp_ptr rp, mp_srcptr up, mp_size_t n, mp_limb_t v0) +{ + mp_limb_t shifted_v0, u0, r0, p0, p1, prev_p1, crec, xl, c1, c2, c3; + + ASSERT (n >= 1); + ASSERT (MPN_SAME_OR_SEPARATE_P (rp, up, n)); + ASSERT_MPN (rp, n); + ASSERT_MPN (up, n); + ASSERT_LIMB (v0); + + shifted_v0 = v0 << GMP_NAIL_BITS; + crec = 0; + prev_p1 = 0; + do + { + u0 = *up++; + r0 = *rp; + umul_ppmm (p1, p0, u0, shifted_v0); + p0 >>= GMP_NAIL_BITS; + ADDC_LIMB (c1, xl, prev_p1, p0); + ADDC_LIMB (c2, xl, xl, r0); + ADDC_LIMB (c3, xl, xl, crec); + crec = c1 + c2 + c3; + *rp++ = xl; + prev_p1 = p1; + } + while (--n != 0); + + return prev_p1 + crec; +} + +#endif + +#if GMP_NAIL_BITS >= 2 + +mp_limb_t +mpn_addmul_1 (mp_ptr rp, mp_srcptr up, mp_size_t n, mp_limb_t v0) +{ + mp_limb_t shifted_v0, u0, r0, p0, p1, prev_p1, xw, crec, xl; + + ASSERT (n >= 1); + ASSERT (MPN_SAME_OR_SEPARATE_P (rp, up, n)); + ASSERT_MPN (rp, n); + ASSERT_MPN (up, n); + ASSERT_LIMB (v0); + + shifted_v0 = v0 << GMP_NAIL_BITS; + crec = 0; + prev_p1 = 0; + do + { + u0 = *up++; + r0 = *rp; + umul_ppmm (p1, p0, u0, shifted_v0); + p0 >>= GMP_NAIL_BITS; + xw = prev_p1 + p0 + r0 + crec; + crec = xw >> GMP_NUMB_BITS; + xl = xw & GMP_NUMB_MASK; + *rp++ = xl; + prev_p1 = p1; + } + while (--n != 0); + + return prev_p1 + crec; +} + +#endif -- cgit v1.2.3