1 dnl Alpha mpn_addmul_1 -- Multiply a limb vector with a limb and add the
2 dnl result to a second limb vector.
4 dnl Copyright 1992, 1994, 1995, 2000, 2002 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
10 dnl by the Free Software Foundation; either version 3 of the License, or (at
11 dnl your 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. If not, see http://www.gnu.org/licenses/.
21 include(`../config.m4')
36 PROLOGUE(mpn_addmul_1)
37 ldq r2,0(r17) C r2 = s1_limb
38 addq r17,8,r17 C s1_ptr++
39 subq r18,1,r18 C size--
40 mulq r2,r19,r3 C r3 = prod_low
41 ldq r5,0(r16) C r5 = *res_ptr
42 umulh r2,r19,r0 C r0 = prod_high
43 beq r18,$Lend1 C jump if size was == 1
44 ldq r2,0(r17) C r2 = s1_limb
45 addq r17,8,r17 C s1_ptr++
46 subq r18,1,r18 C size--
50 addq r16,8,r16 C res_ptr++
51 beq r18,$Lend2 C jump if size was == 2
54 $Loop: mulq r2,r19,r3 C r3 = prod_low
55 ldq r5,0(r16) C r5 = *res_ptr
56 addq r4,r0,r0 C cy_limb = cy_limb + 'cy'
57 subq r18,1,r18 C size--
58 umulh r2,r19,r4 C r4 = cy_limb
59 ldq r2,0(r17) C r2 = s1_limb
60 addq r17,8,r17 C s1_ptr++
61 addq r3,r0,r3 C r3 = cy_limb + prod_low
62 cmpult r3,r0,r0 C r0 = carry from (cy_limb + prod_low)
66 addq r16,8,r16 C res_ptr++
67 addq r5,r0,r0 C combine carries
70 $Lend2: mulq r2,r19,r3 C r3 = prod_low
71 ldq r5,0(r16) C r5 = *res_ptr
72 addq r4,r0,r0 C cy_limb = cy_limb + 'cy'
73 umulh r2,r19,r4 C r4 = cy_limb
74 addq r3,r0,r3 C r3 = cy_limb + prod_low
75 cmpult r3,r0,r0 C r0 = carry from (cy_limb + prod_low)
79 addq r5,r0,r0 C combine carries
80 addq r4,r0,r0 C cy_limb = prod_high + cy
87 EPILOGUE(mpn_addmul_1)