github.com/aergoio/aergo@v1.3.1/libtool/src/gmp-6.1.2/mpn/pa32/hppa2_0/add_n.asm (about)

     1  dnl  HP-PA 2.0 32-bit mpn_add_n -- Add two limb vectors of the same length > 0
     2  dnl  and store sum in a third limb vector.
     3  
     4  dnl  Copyright 1997, 1998, 2000-2002 Free Software Foundation, Inc.
     5  
     6  dnl  This file is part of the GNU MP Library.
     7  dnl
     8  dnl  The GNU MP Library is free software; you can redistribute it and/or modify
     9  dnl  it under the terms of either:
    10  dnl
    11  dnl    * the GNU Lesser General Public License as published by the Free
    12  dnl      Software Foundation; either version 3 of the License, or (at your
    13  dnl      option) any later version.
    14  dnl
    15  dnl  or
    16  dnl
    17  dnl    * the GNU General Public License as published by the Free Software
    18  dnl      Foundation; either version 2 of the License, or (at your option) any
    19  dnl      later version.
    20  dnl
    21  dnl  or both in parallel, as here.
    22  dnl
    23  dnl  The GNU MP Library is distributed in the hope that it will be useful, but
    24  dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    25  dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    26  dnl  for more details.
    27  dnl
    28  dnl  You should have received copies of the GNU General Public License and the
    29  dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,
    30  dnl  see https://www.gnu.org/licenses/.
    31  
    32  include(`../config.m4')
    33  
    34  C INPUT PARAMETERS
    35  C res_ptr	gr26
    36  C s1_ptr	gr25
    37  C s2_ptr	gr24
    38  C size		gr23
    39  
    40  C This runs at 2 cycles/limb on PA8000.
    41  
    42  ASM_START()
    43  PROLOGUE(mpn_add_n)
    44  	sub		%r0,%r23,%r22
    45  	zdep		%r22,30,3,%r28		C r28 = 2 * (-n & 7)
    46  	zdep		%r22,29,3,%r22		C r22 = 4 * (-n & 7)
    47  	sub		%r25,%r22,%r25		C offset s1_ptr
    48  	sub		%r24,%r22,%r24		C offset s2_ptr
    49  	sub		%r26,%r22,%r26		C offset res_ptr
    50  	blr		%r28,%r0		C branch into loop
    51  	add		%r0,%r0,%r0		C reset carry
    52  
    53  LDEF(loop)
    54  	ldw		0(%r25),%r20
    55  	ldw		0(%r24),%r31
    56  	addc		%r20,%r31,%r20
    57  	stw		%r20,0(%r26)
    58  
    59  LDEF(7)
    60  	ldw		4(%r25),%r21
    61  	ldw		4(%r24),%r19
    62  	addc		%r21,%r19,%r21
    63  	stw		%r21,4(%r26)
    64  
    65  LDEF(6)
    66  	ldw		8(%r25),%r20
    67  	ldw		8(%r24),%r31
    68  	addc		%r20,%r31,%r20
    69  	stw		%r20,8(%r26)
    70  
    71  LDEF(5)
    72  	ldw		12(%r25),%r21
    73  	ldw		12(%r24),%r19
    74  	addc		%r21,%r19,%r21
    75  	stw		%r21,12(%r26)
    76  
    77  LDEF(4)
    78  	ldw		16(%r25),%r20
    79  	ldw		16(%r24),%r31
    80  	addc		%r20,%r31,%r20
    81  	stw		%r20,16(%r26)
    82  
    83  LDEF(3)
    84  	ldw		20(%r25),%r21
    85  	ldw		20(%r24),%r19
    86  	addc		%r21,%r19,%r21
    87  	stw		%r21,20(%r26)
    88  
    89  LDEF(2)
    90  	ldw		24(%r25),%r20
    91  	ldw		24(%r24),%r31
    92  	addc		%r20,%r31,%r20
    93  	stw		%r20,24(%r26)
    94  
    95  LDEF(1)
    96  	ldw		28(%r25),%r21
    97  	ldo		32(%r25),%r25
    98  	ldw		28(%r24),%r19
    99  	addc		%r21,%r19,%r21
   100  	stw		%r21,28(%r26)
   101  	ldo		32(%r24),%r24
   102  	addib,>		-8,%r23,L(loop)
   103  	ldo		32(%r26),%r26
   104  
   105  	bv		(%r2)
   106  	addc		%r0,%r0,%r28
   107  EPILOGUE()