1/* hppa rshift 2 * optimized for the PA7100, where it runs at 3.25 cycles/limb 3 * 4 * Copyright (C) 1992, 1994, 1998, 5 * 2001, 2002 Free Software Foundation, Inc. 6 * 7 * This file is part of Libgcrypt. 8 * 9 * Libgcrypt is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU Lesser General Public License as 11 * published by the Free Software Foundation; either version 2.1 of 12 * the License, or (at your option) any later version. 13 * 14 * Libgcrypt is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public 20 * License along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA 22 */ 23 24 25 26/******************* 27 * mpi_limb_t 28 * _gcry_mpih_rshift( mpi_ptr_t wp, (gr26) 29 * mpi_ptr_t up, (gr25) 30 * mpi_size_t usize, (gr24) 31 * unsigned cnt) (gr23) 32 */ 33 34 .code 35 .export _gcry_mpih_rshift 36 .label _gcry_mpih_rshift 37 .proc 38 .callinfo frame=64,no_calls 39 .entry 40 41 ldws,ma 4(0,%r25),%r22 42 mtsar %r23 43 addib,= -1,%r24,L$r004 44 vshd %r22,%r0,%r28 ; compute carry out limb 45 ldws,ma 4(0,%r25),%r29 46 addib,<= -5,%r24,L$rrest 47 vshd %r29,%r22,%r20 48 49 .label L$roop 50 ldws,ma 4(0,%r25),%r22 51 stws,ma %r20,4(0,%r26) 52 vshd %r22,%r29,%r20 53 ldws,ma 4(0,%r25),%r29 54 stws,ma %r20,4(0,%r26) 55 vshd %r29,%r22,%r20 56 ldws,ma 4(0,%r25),%r22 57 stws,ma %r20,4(0,%r26) 58 vshd %r22,%r29,%r20 59 ldws,ma 4(0,%r25),%r29 60 stws,ma %r20,4(0,%r26) 61 addib,> -4,%r24,L$roop 62 vshd %r29,%r22,%r20 63 64 .label L$rrest 65 addib,= 4,%r24,L$rend1 66 nop 67 .label L$eroop 68 ldws,ma 4(0,%r25),%r22 69 stws,ma %r20,4(0,%r26) 70 addib,<= -1,%r24,L$rend2 71 vshd %r22,%r29,%r20 72 ldws,ma 4(0,%r25),%r29 73 stws,ma %r20,4(0,%r26) 74 addib,> -1,%r24,L$eroop 75 vshd %r29,%r22,%r20 76 77 .label L$rend1 78 stws,ma %r20,4(0,%r26) 79 vshd %r0,%r29,%r20 80 bv 0(%r2) 81 stw %r20,0(0,%r26) 82 .label L$rend2 83 stws,ma %r20,4(0,%r26) 84 .label L$r004 85 vshd %r0,%r22,%r20 86 bv 0(%r2) 87 stw %r20,0(0,%r26) 88 89 .exit 90 .procend 91 92 93