--- /dev/null
+c Helper for mpn_mul_1, mpn_addmul_1, and mpn_submul_1 for Cray PVP.
+
+c Copyright 1996, 2000 Free Software Foundation, Inc.
+
+c This file is part of the GNU MP Library.
+
+c The GNU MP Library is free software; you can redistribute it and/or
+c modify it under the terms of the GNU Lesser General Public License as
+c published by the Free Software Foundation; either version 3 of the
+c License, or (at your option) any later version.
+
+c The GNU MP Library is distributed in the hope that it will be useful,
+c but WITHOUT ANY WARRANTY; without even the implied warranty of
+c MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+c Lesser General Public License for more details.
+
+c You should have received a copy of the GNU Lesser General Public License
+c along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
+
+c p1[] = hi(a[]*s); the upper limbs of each product
+c p0[] = low(a[]*s); the corresponding lower limbs
+c n is number of limbs in the vectors
+
+ subroutine gmpn_mulww(p1,p0,a,n,s)
+ integer*8 p1(0:*),p0(0:*),a(0:*),s
+ integer n
+
+ integer*8 a0,a1,a2,s0,s1,s2,c
+ integer*8 ai,t0,t1,t2,t3,t4
+
+ s0 = shiftl(and(s,4194303),24)
+ s1 = shiftl(and(shiftr(s,22),4194303),24)
+ s2 = shiftl(and(shiftr(s,44),4194303),24)
+
+ do i = 0,n-1
+ ai = a(i)
+ a0 = shiftl(and(ai,4194303),24)
+ a1 = shiftl(and(shiftr(ai,22),4194303),24)
+ a2 = shiftl(and(shiftr(ai,44),4194303),24)
+
+ t0 = i24mult(a0,s0)
+ t1 = i24mult(a0,s1)+i24mult(a1,s0)
+ t2 = i24mult(a0,s2)+i24mult(a1,s1)+i24mult(a2,s0)
+ t3 = i24mult(a1,s2)+i24mult(a2,s1)
+ t4 = i24mult(a2,s2)
+
+ p0(i)=shiftl(t2,44)+shiftl(t1,22)+t0
+ c=shiftr(shiftr(t0,22)+and(t1,4398046511103)+
+ $ shiftl(and(t2,1048575),22),42)
+ p1(i)=shiftl(t4,24)+shiftl(t3,2)+shiftr(t2,20)+shiftr(t1,42)+c
+ end do
+ end
projects / msp430-gcc.git / blobdiff