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

     1  dnl  SH mpn_add_n -- Add two limb vectors of the same length > 0 and store sum
     2  dnl  in a third limb vector.
     3  
     4  dnl  Copyright 1995, 1997, 2000, 2011 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  
    33  include(`../config.m4')
    34  
    35  C INPUT PARAMETERS
    36  C rp		r4
    37  C up		r5
    38  C vp		r6
    39  C n		r7
    40  
    41  changecom(blah)			C disable # to make all C comments below work
    42  
    43  ASM_START()
    44  PROLOGUE(mpn_add_n)
    45  	mov	#0,r3		C clear cy save reg
    46  
    47  L(top):	mov.l	@r5+,r1
    48  	mov.l	@r6+,r2
    49  	shlr	r3		C restore cy
    50  	addc	r2,r1
    51  	movt	r3		C save cy
    52  	mov.l	r1,@r4
    53  	dt	r7
    54  	bf.s	L(top)
    55  	 add	#4,r4
    56  
    57  	rts
    58  	mov	r3,r0		C return carry-out from most significant limb
    59  EPILOGUE()