1 dnl Alpha __gmpn_mul_1 -- Multiply a limb vector with a limb and store
2 dnl the result in a second limb vector.
4 dnl Copyright (C) 1992, 1994, 1995, 2000 Free Software Foundation, Inc.
6 dnl This file is part of the GNU MP Library.
8 dnl The GNU MP Library is free software; you can redistribute it and/or modify
9 dnl it under the terms of the GNU Lesser General Public License as published by
10 dnl the Free Software Foundation; either version 2.1 of the License, or (at your
11 dnl option) any later version.
13 dnl The GNU MP Library is distributed in the hope that it will be useful, but
14 dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16 dnl License for more details.
18 dnl You should have received a copy of the GNU Lesser General Public License
19 dnl along with the GNU MP Library; see the file COPYING.LIB. If not, write to
20 dnl the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
21 dnl MA 02111-1307, USA.
23 include(`../config.m4')
31 dnl This code runs at 42 cycles/limb on EV4, 18 cycles/limb on EV5, and 7
32 dnl cycles/limb on EV6.
36 ldq r2,0(r17) C r2 = s1_limb
37 subq r18,1,r18 C size--
38 mulq r2,r19,r3 C r3 = prod_low
39 bic r31,r31,r4 C clear cy_limb
40 umulh r2,r19,r0 C r0 = prod_high
41 beq r18,$Lend1 C jump if size was == 1
42 ldq r2,8(r17) C r2 = s1_limb
43 subq r18,1,r18 C size--
45 beq r18,$Lend2 C jump if size was == 2
48 $Loop: mulq r2,r19,r3 C r3 = prod_low
49 addq r4,r0,r0 C cy_limb = cy_limb + 'cy'
50 subq r18,1,r18 C size--
51 umulh r2,r19,r4 C r4 = cy_limb
52 ldq r2,16(r17) C r2 = s1_limb
53 addq r17,8,r17 C s1_ptr++
54 addq r3,r0,r3 C r3 = cy_limb + prod_low
56 cmpult r3,r0,r0 C r0 = carry from (cy_limb + prod_low)
57 addq r16,8,r16 C res_ptr++
60 $Lend2: mulq r2,r19,r3 C r3 = prod_low
61 addq r4,r0,r0 C cy_limb = cy_limb + 'cy'
62 umulh r2,r19,r4 C r4 = cy_limb
63 addq r3,r0,r3 C r3 = cy_limb + prod_low
64 cmpult r3,r0,r0 C r0 = carry from (cy_limb + prod_low)
66 addq r4,r0,r0 C cy_limb = prod_high + cy