github.com/aergoio/aergo@v1.3.1/libtool/src/gmp-6.1.2/mpn/sparc64/ultrasparct3/mod_34lsub1.asm (about)

     1  dnl  SPARC v9 mpn_mod_34lsub1 for T3/T4/T5.
     2  
     3  dnl  Copyright 2005, 2013 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		    cycles/limb
    34  C UltraSPARC T1:	 -
    35  C UltraSPARC T3:	 5
    36  C UltraSPARC T4:	 1.57
    37  
    38  C This is based on the powerpc64/mode64 code.
    39  
    40  C INPUT PARAMETERS
    41  define(`up', `%i0')
    42  define(`n',  `%i1')
    43  
    44  ASM_START()
    45  	REGISTER(%g2,#scratch)
    46  	REGISTER(%g3,#scratch)
    47  PROLOGUE(mpn_mod_34lsub1)
    48  	save	%sp, -176, %sp
    49  
    50  	mov	0, %g1
    51  	mov	0, %g3
    52  	mov	0, %g4
    53  	addcc	%g0, 0, %g5
    54  
    55  	add	n, -3, n
    56  	brlz	n, L(lt3)
    57  	 nop
    58  
    59  	add	n, -3, n
    60  	ldx	[up+0], %l5
    61  	ldx	[up+8], %l6
    62  	ldx	[up+16], %l7
    63  	brlz	n, L(end)
    64  	 add	up, 24, up
    65  
    66  	ALIGN(16)
    67  L(top):	addxccc(%g1, %l5, %g1)
    68  	ldx	[up+0], %l5
    69  	addxccc(%g3, %l6, %g3)
    70  	ldx	[up+8], %l6
    71  	addxccc(%g4, %l7, %g4)
    72  	ldx	[up+16], %l7
    73  	add	n, -3, n
    74  	brgez	n, L(top)
    75  	 add	up, 24, up
    76  
    77  L(end):	addxccc(	%g1, %l5, %g1)
    78  	addxccc(%g3, %l6, %g3)
    79  	addxccc(%g4, %l7, %g4)
    80  	addxc(	%g5, %g0, %g5)
    81  
    82  L(lt3):	cmp	n, -2
    83  	blt	L(2)
    84  	 nop
    85  
    86  	ldx	[up+0], %l5
    87  	mov	0, %l6
    88  	beq	L(1)
    89  	 addcc	%g1, %l5, %g1
    90  
    91  	ldx	[up+8], %l6
    92  L(1):	addxccc(%g3, %l6, %g3)
    93  	addxccc(%g4, %g0, %g4)
    94  	addxc(	%g5, %g0, %g5)
    95  
    96  L(2):	sllx	%g1, 16, %l0
    97  	srlx	%l0, 16, %l0		C %l0 = %g1 mod 2^48
    98  	srlx	%g1, 48, %l3		C %l3 = %g1 div 2^48
    99  	srl	%g3, 0, %g1
   100  	sllx	%g1, 16, %l4		C %l4 = (%g3 mod 2^32) << 16
   101  	srlx	%g3, 32, %l5		C %l5 = %g3 div 2^32
   102  	sethi	%hi(0xffff0000), %g1
   103  	andn	%g4, %g1, %g1
   104  	sllx	%g1, 32, %l6		C %l6 = (%g4 mod 2^16) << 32
   105  	srlx	%g4, 16, %l7		C %l7 = %g4 div 2^16
   106  
   107  	add	%l0, %l3, %l0
   108  	add	%l4, %l5, %l4
   109  	add	%l6, %l7, %l6
   110  
   111  	add	%l0, %l4, %l0
   112  	add	%l6, %g5, %l6
   113  
   114  	add	%l0, %l6, %i0
   115  	ret
   116  	 restore
   117  EPILOGUE()