github.com/aergoio/aergo@v1.3.1/libtool/src/gmp-6.1.2/mpn/pa32/rshift.asm (about)

     1  dnl  HP-PA  mpn_rshift -- Shift a number right.
     2  
     3  dnl  Copyright 1992, 1994, 2000-2002 Free Software Foundation, Inc.
     4  
     5  dnl  This file is part of the GNU MP Library.
     6  dnl
     7  dnl  The GNU MP Library is free software; you can redistribute it and/or modify
     8  dnl  it under the terms of either:
     9  dnl
    10  dnl    * the GNU Lesser General Public License as published by the Free
    11  dnl      Software Foundation; either version 3 of the License, or (at your
    12  dnl      option) any later version.
    13  dnl
    14  dnl  or
    15  dnl
    16  dnl    * the GNU General Public License as published by the Free Software
    17  dnl      Foundation; either version 2 of the License, or (at your option) any
    18  dnl      later version.
    19  dnl
    20  dnl  or both in parallel, as here.
    21  dnl
    22  dnl  The GNU MP Library is distributed in the hope that it will be useful, but
    23  dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    24  dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    25  dnl  for more details.
    26  dnl
    27  dnl  You should have received copies of the GNU General Public License and the
    28  dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,
    29  dnl  see https://www.gnu.org/licenses/.
    30  
    31  include(`../config.m4')
    32  
    33  C INPUT PARAMETERS
    34  C res_ptr	gr26
    35  C s_ptr		gr25
    36  C size		gr24
    37  C cnt		gr23
    38  
    39  ASM_START()
    40  PROLOGUE(mpn_rshift)
    41  	ldws,ma		4(0,%r25),%r22
    42  	mtsar		%r23
    43  	addib,=		-1,%r24,L(0004)
    44  	vshd		%r22,%r0,%r28		C compute carry out limb
    45  	ldws,ma		4(0,%r25),%r29
    46  	addib,=		-1,%r24,L(0002)
    47  	vshd		%r29,%r22,%r20
    48  
    49  LDEF(loop)
    50  	ldws,ma		4(0,%r25),%r22
    51  	stws,ma		%r20,4(0,%r26)
    52  	addib,=		-1,%r24,L(0003)
    53  	vshd		%r22,%r29,%r20
    54  	ldws,ma		4(0,%r25),%r29
    55  	stws,ma		%r20,4(0,%r26)
    56  	addib,<>	-1,%r24,L(loop)
    57  	vshd		%r29,%r22,%r20
    58  
    59  LDEF(0002)
    60  	stws,ma		%r20,4(0,%r26)
    61  	vshd		%r0,%r29,%r20
    62  	bv		0(%r2)
    63  	stw		%r20,0(0,%r26)
    64  
    65  LDEF(0003)
    66  	stws,ma		%r20,4(0,%r26)
    67  
    68  LDEF(0004)
    69  	vshd		%r0,%r22,%r20
    70  	bv		0(%r2)
    71  	stw		%r20,0(0,%r26)
    72  EPILOGUE()