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

     1  dnl  SPARC v9 mpn_lshift
     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 1&2:	 2
    37  C UltraSPARC 3:		 2.5
    38  C UltraSPARC T1:	17.5
    39  C UltraSPARC T3:	 8
    40  C UltraSPARC T4:	 3
    41  
    42  C INPUT PARAMETERS
    43  define(`rp',     `%i0')
    44  define(`up',     `%i1')
    45  define(`n',      `%i2')
    46  define(`cnt',    `%i3')
    47  
    48  define(`tcnt',   `%i4')
    49  define(`retval', `%i5')
    50  define(`u0',     `%l0')
    51  define(`u1',     `%l1')
    52  define(`r0',     `%l6')
    53  define(`r1',     `%l7')
    54  define(`u0_off', `%o0')
    55  define(`u1_off', `%o1')
    56  define(`r0_off', `%o2')
    57  define(`r1_off', `%o3')
    58  
    59  ASM_START()
    60  	REGISTER(%g2,#scratch)
    61  	REGISTER(%g3,#scratch)
    62  PROLOGUE(mpn_lshift)
    63  	save	%sp, -176, %sp
    64  
    65  	sllx	n, 3, n
    66  	sub	%g0, cnt, tcnt
    67  
    68  	sub	up, 8, u1_off
    69  	add	rp, (5 * 8), r1_off
    70  
    71  	ldx	[n + u1_off], u1	C WAS: up - 8
    72  	add	u1_off, (3 * 8), u1_off
    73  
    74  	sub	r1_off, 8, r0_off
    75  	sub	u1_off, 8, u0_off
    76  
    77  	subcc	n, (3 * 8), n
    78  	srlx	u1, tcnt, retval
    79  
    80  	bl,pn	%xcc, L(end12)
    81  	 sllx	u1, cnt, %l3
    82  
    83  	ldx	[n + u0_off], u0	C WAS: up - 16
    84  	subcc	n, (2 * 8), n
    85  
    86  	ldx	[n + u1_off], u1	C WAS: up - 24
    87  
    88  	bl,pn	%xcc, L(end34)
    89  	 srlx	u0, tcnt, %l4
    90  
    91  	b,a	L(top)
    92  	ALIGN(16)
    93  L(top):
    94  	sllx	u0, cnt, %l2
    95  	or	%l4, %l3, r0
    96  
    97  	ldx	[n + u0_off], u0	C WAS: up - 16
    98  	srlx	u1, tcnt, %l5
    99  
   100  	stx	r0, [n + r0_off]	C WAS: rp - 8
   101  	subcc	n, (2 * 8), n
   102  
   103  	sllx	u1, cnt, %l3
   104  	or	%l2, %l5, r1
   105  
   106  	ldx	[n + u1_off], u1	C WAS: up - 24
   107  	srlx	u0, tcnt, %l4
   108  
   109  	bge,pt	%xcc, L(top)
   110  	 stx	r1, [n + r1_off]	C WAS: rp - 16
   111  
   112  L(end34):
   113  	sllx	u0, cnt, %l2
   114  	or	%l4, %l3, r0
   115  
   116  	srlx	u1, tcnt, %l5
   117  	stx	r0, [n + r0_off]	C WAS: rp - 8
   118  
   119  	or	%l2, %l5, r1
   120  	sub	n, (2 * 8), %o5
   121  
   122  	sllx	u1, cnt, %l3
   123  	stx	r1, [%o5 + r1_off]	C WAS: rp - 16
   124  
   125  L(end12):
   126  	andcc	n, 8, %g0
   127  	bz,pn	%xcc, L(done)
   128  	 nop
   129  
   130  	ldx	[n + u0_off], u1
   131  	srlx	u1, tcnt, %l4
   132  	or	%l4, %l3, r0
   133  	stx	r0, [r0_off - 24]
   134  	sllx	u1, cnt, %l3
   135  L(done):
   136  	stx	%l3, [r0_off - 32]
   137  
   138  	ret
   139  	restore retval, 0, %o0
   140  EPILOGUE()