github.com/aergoio/aergo@v1.3.1/libtool/src/gmp-6.1.2/mpn/sparc64/ultrasparct3/add_n.asm (about)

     1  dnl  SPARC v9 mpn_add_n for T3/T4.
     2  
     3  dnl  Contributed to the GNU project by David Miller.
     4  
     5  dnl  Copyright 2013 Free Software Foundation, Inc.
     6  
     7  dnl  This file is part of the GNU MP Library.
     8  dnl
     9  dnl  The GNU MP Library is free software; you can redistribute it and/or modify
    10  dnl  it under the terms of either:
    11  dnl
    12  dnl    * the GNU Lesser General Public License as published by the Free
    13  dnl      Software Foundation; either version 3 of the License, or (at your
    14  dnl      option) any later version.
    15  dnl
    16  dnl  or
    17  dnl
    18  dnl    * the GNU General Public License as published by the Free Software
    19  dnl      Foundation; either version 2 of the License, or (at your option) any
    20  dnl      later version.
    21  dnl
    22  dnl  or both in parallel, as here.
    23  dnl
    24  dnl  The GNU MP Library is distributed in the hope that it will be useful, but
    25  dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    26  dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    27  dnl  for more details.
    28  dnl
    29  dnl  You should have received copies of the GNU General Public License and the
    30  dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,
    31  dnl  see https://www.gnu.org/licenses/.
    32  
    33  include(`../config.m4')
    34  
    35  C		   cycles/limb
    36  C UltraSPARC T3:	 8
    37  C UltraSPARC T4:	 3
    38  
    39  C INPUT PARAMETERS
    40  define(`rp', `%i0')
    41  define(`up', `%i1')
    42  define(`vp', `%i2')
    43  define(`n',  `%i3')
    44  define(`cy', `%i4')
    45  
    46  define(`u0_off', `%l2')
    47  define(`u1_off', `%l3')
    48  define(`loop_n', `%l6')
    49  define(`tmp', `%l7')
    50  
    51  ASM_START()
    52  	REGISTER(%g2,#scratch)
    53  	REGISTER(%g3,#scratch)
    54  PROLOGUE(mpn_add_nc)
    55  	save	%sp, -176, %sp
    56  	b,a	L(ent)
    57  EPILOGUE()
    58  PROLOGUE(mpn_add_n)
    59  	save	%sp, -176, %sp
    60  
    61  	mov	0, cy
    62  L(ent):
    63  	subcc	n, 1, n
    64  	be	L(final_one)
    65  	 cmp	%g0, cy
    66  
    67  	ldx	[up + 0], %o4
    68  	sllx	n, 3, tmp
    69  
    70  	ldx	[vp + 0], %o5
    71  	add	up, tmp, u0_off
    72  
    73  	ldx	[up + 8], %g5
    74  	neg	tmp, loop_n
    75  
    76  	ldx	[vp + 8], %g1
    77  	add	u0_off, 8, u1_off
    78  
    79  	sub	loop_n, -(2 * 8), loop_n
    80  
    81  	brgez,pn loop_n, L(loop_tail)
    82  	 add	vp, (2 * 8), vp
    83  
    84  	b,a	L(top)
    85  	ALIGN(16)
    86  L(top):
    87  	addxccc(%o4, %o5, tmp)
    88  	ldx	[vp + 0], %o5
    89  
    90  	add	rp, (2 * 8), rp
    91  	ldx	[loop_n + u0_off], %o4
    92  
    93  	add	vp, (2 * 8), vp
    94  	stx	tmp, [rp - 16]
    95  
    96  	addxccc(%g1, %g5, tmp)
    97  	ldx	[vp - 8], %g1
    98  
    99  	ldx	[loop_n + u1_off], %g5
   100  	sub	loop_n, -(2 * 8), loop_n
   101  
   102  	brlz	loop_n, L(top)
   103  	 stx	tmp, [rp - 8]
   104  
   105  L(loop_tail):
   106  	addxccc(%o4, %o5, %g3)
   107  	add	loop_n, u0_off, up
   108  
   109  	addxccc(%g1, %g5, %g5)
   110  	stx	%g3, [rp + 0]
   111  
   112  	brgz,pt	loop_n, L(done)
   113  	 stx	%g5, [rp + 8]
   114  
   115  	add	rp, (2 * 8), rp
   116  L(final_one):
   117  	ldx	[up+0], %o4
   118  	ldx	[vp+0], %o5
   119  	addxccc(%o4, %o5, %g3)
   120  	stx	%g3, [rp+0]
   121  
   122  L(done):
   123  	addxc(%g0, %g0, %i0)
   124  	ret
   125  	 restore
   126  EPILOGUE()