github.com/aergoio/aergo@v1.3.1/libtool/src/gmp-6.1.2/mpn/vax/submul_1.asm (about)

     1  dnl  VAX mpn_submul_1 -- Multiply a limb vector with a limb and subtract the
     2  dnl  result from a second limb vector.
     3  
     4  dnl  Copyright 1992, 1994, 1996, 2000, 2012 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  ASM_START()
    35  PROLOGUE(mpn_submul_1)
    36  	.word	0xfc0
    37  	movl	12(ap), r4
    38  	movl	8(ap), r8
    39  	movl	4(ap), r9
    40  	clrl	r3
    41  	incl	r4
    42  	ashl	$-1, r4, r7
    43  	clrl	r11
    44  	movl	16(ap), r6
    45  	jlss	L(v0_big)
    46  	jlbc	r4, L(1)
    47  
    48  C Loop for v0 < 0x80000000
    49  L(tp1):	movl	(r8)+, r1
    50  	jlss	L(1n0)
    51  	emul	r1, r6, $0, r2
    52  	addl2	r11, r2
    53  	adwc	$0, r3
    54  	subl2	r2, (r9)+
    55  	adwc	$0, r3
    56  L(1):	movl	(r8)+, r1
    57  	jlss	L(1n1)
    58  L(1p1):	emul	r1, r6, $0, r10
    59  	addl2	r3, r10
    60  	adwc	$0, r11
    61  	subl2	r10, (r9)+
    62  	adwc	$0, r11
    63  
    64  	sobgtr	r7, L(tp1)
    65  	movl	r11, r0
    66  	ret
    67  
    68  L(1n0):	emul	r1, r6, $0, r2
    69  	addl2	r11, r2
    70  	adwc	r6, r3
    71  	subl2	r2, (r9)+
    72  	adwc	$0, r3
    73  	movl	(r8)+, r1
    74  	jgeq	L(1p1)
    75  L(1n1):	emul	r1, r6, $0, r10
    76  	addl2	r3, r10
    77  	adwc	r6, r11
    78  	subl2	r10, (r9)+
    79  	adwc	$0, r11
    80  
    81  	sobgtr	r7, L(tp1)
    82  	movl	r11, r0
    83  	ret
    84  
    85  L(v0_big):
    86  	jlbc	r4, L(2)
    87  
    88  C Loop for v0 >= 0x80000000
    89  L(tp2):	movl	(r8)+, r1
    90  	jlss	L(2n0)
    91  	emul	r1, r6, $0, r2
    92  	addl2	r11, r2
    93  	adwc	r1, r3
    94  	subl2	r2, (r9)+
    95  	adwc	$0, r3
    96  L(2):	movl	(r8)+, r1
    97  	jlss	L(2n1)
    98  L(2p1):	emul	r1, r6, $0, r10
    99  	addl2	r3, r10
   100  	adwc	r1, r11
   101  	subl2	r10, (r9)+
   102  	adwc	$0, r11
   103  
   104  	sobgtr	r7, L(tp2)
   105  	movl	r11, r0
   106  	ret
   107  
   108  L(2n0):	emul	r1, r6, $0, r2
   109  	addl2	r11, r2
   110  	adwc	r6, r3
   111  	subl2	r2, (r9)+
   112  	adwc	r1, r3
   113  	movl	(r8)+, r1
   114  	jgeq	L(2p1)
   115  L(2n1):	emul	r1, r6, $0, r10
   116  	addl2	r3, r10
   117  	adwc	r6, r11
   118  	subl2	r10, (r9)+
   119  	adwc	r1, r11
   120  
   121  	sobgtr	r7, L(tp2)
   122  	movl	r11, r0
   123  	ret
   124  EPILOGUE()