1 dnl HP-PA 2.0 mpn_rshift -- Right shift.
3 dnl Copyright 1997, 2000, 2002, 2003 Free Software Foundation, Inc.
5 dnl This file is part of the GNU MP Library.
7 dnl The GNU MP Library is free software; you can redistribute it and/or modify
8 dnl it under the terms of the GNU Lesser General Public License as published
9 dnl by the Free Software Foundation; either version 3 of the License, or (at
10 dnl your option) any later version.
12 dnl The GNU MP Library is distributed in the hope that it will be useful, but
13 dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
15 dnl License for more details.
17 dnl You should have received a copy of the GNU Lesser General Public License
18 dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
21 dnl This runs at 1.5 cycles/limb on PA8000 and 1.0 cycles/limb on PA8500.
23 include(`../config.m4')
31 ifdef(`HAVE_ABI_2_0w',
39 shrpd %r21, %r0, %sar, %r29 C compute carry out limb
40 depw,z n, 31, 3, %r28 C r28 = (size & 7)
42 depw,z %r22, 28, 3, %r22 C r22 = 8 * (-size & 7)
43 sub up, %r22, up C offset up
44 blr %r28, %r0 C branch into jump table
45 sub rp, %r22, rp C offset rp
64 LDEF(0) ldd 8(up), %r20
65 shrpd %r20, %r21, %sar, %r21
67 LDEF(7) ldd 16(up), %r21
68 shrpd %r21, %r20, %sar, %r20
70 LDEF(6) ldd 24(up), %r20
71 shrpd %r20, %r21, %sar, %r21
73 LDEF(5) ldd 32(up), %r21
74 shrpd %r21, %r20, %sar, %r20
76 LDEF(4) ldd 40(up), %r20
77 shrpd %r20, %r21, %sar, %r21
79 LDEF(3) ldd 48(up), %r21
80 shrpd %r21, %r20, %sar, %r20
82 LDEF(2) ldd 56(up), %r20
83 shrpd %r20, %r21, %sar, %r21
85 LDEF(1) ldd 64(up), %r21
87 shrpd %r21, %r20, %sar, %r20
89 addib,> -8, n, L(loop)
93 shrpd %r0, %r21, %sar, %r21
96 ifdef(`HAVE_ABI_2_0w',
98 ',` extrd,u %r29, 31, 32, %r28