| /* HP-PA __udiv_qrnnd division support, used from longlong.h. |
| * This version runs fast on pre-PA7000 CPUs. |
| * |
| * Copyright (C) 1993, 1994, 1998, 2001, |
| * 2002 Free Software Foundation, Inc. |
| * |
| * This file is part of Libgcrypt. |
| * |
| * Libgcrypt is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Lesser General Public License as |
| * published by the Free Software Foundation; either version 2.1 of |
| * the License, or (at your option) any later version. |
| * |
| * Libgcrypt 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 Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
| * |
| * Note: This code is heavily based on the GNU MP Library. |
| * Actually it's the same code with only minor changes in the |
| * way the data is stored; this is to support the abstraction |
| * of an optional secure memory allocation which may be used |
| * to avoid revealing of sensitive data due to paging etc. |
| */ |
| |
| |
| |
| /* INPUT PARAMETERS |
| * rem_ptr gr26 |
| * n1 gr25 |
| * n0 gr24 |
| * d gr23 |
| * |
| * The code size is a bit excessive. We could merge the last two ds;addc |
| * sequences by simply moving the "bb,< Odd" instruction down. The only |
| * trouble is the FFFFFFFF code that would need some hacking. |
| */ |
| |
| .code |
| .export __udiv_qrnnd |
| .label __udiv_qrnnd |
| .proc |
| .callinfo frame=0,no_calls |
| .entry |
| |
| comb,< %r23,0,L$largedivisor |
| sub %r0,%r23,%r1 ; clear cy as side-effect |
| ds %r0,%r1,%r0 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r23,%r25 |
| addc %r24,%r24,%r28 |
| ds %r25,%r23,%r25 |
| comclr,>= %r25,%r0,%r0 |
| addl %r25,%r23,%r25 |
| stws %r25,0(0,%r26) |
| bv 0(%r2) |
| addc %r28,%r28,%r28 |
| |
| .label L$largedivisor |
| extru %r24,31,1,%r19 ; r19 = n0 & 1 |
| bb,< %r23,31,L$odd |
| extru %r23,30,31,%r22 ; r22 = d >> 1 |
| shd %r25,%r24,1,%r24 ; r24 = new n0 |
| extru %r25,30,31,%r25 ; r25 = new n1 |
| sub %r0,%r22,%r21 |
| ds %r0,%r21,%r0 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| comclr,>= %r25,%r0,%r0 |
| addl %r25,%r22,%r25 |
| sh1addl %r25,%r19,%r25 |
| stws %r25,0(0,%r26) |
| bv 0(%r2) |
| addc %r24,%r24,%r28 |
| |
| .label L$odd |
| addib,sv,n 1,%r22,L$FF.. ; r22 = (d / 2 + 1) |
| shd %r25,%r24,1,%r24 ; r24 = new n0 |
| extru %r25,30,31,%r25 ; r25 = new n1 |
| sub %r0,%r22,%r21 |
| ds %r0,%r21,%r0 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r24 |
| ds %r25,%r22,%r25 |
| addc %r24,%r24,%r28 |
| comclr,>= %r25,%r0,%r0 |
| addl %r25,%r22,%r25 |
| sh1addl %r25,%r19,%r25 |
| ; We have computed (n1,,n0) / (d + 1), q' = r28, r' = r25 |
| add,nuv %r28,%r25,%r25 |
| addl %r25,%r1,%r25 |
| addc %r0,%r28,%r28 |
| sub,<< %r25,%r23,%r0 |
| addl %r25,%r1,%r25 |
| stws %r25,0(0,%r26) |
| bv 0(%r2) |
| addc %r0,%r28,%r28 |
| |
| ; This is just a special case of the code above. |
| ; We come here when d == 0xFFFFFFFF |
| .label L$FF.. |
| add,uv %r25,%r24,%r24 |
| sub,<< %r24,%r23,%r0 |
| ldo 1(%r24),%r24 |
| stws %r24,0(0,%r26) |
| bv 0(%r2) |
| addc %r0,%r25,%r28 |
| |
| .exit |
| .procend |
