github.com/aergoio/aergo@v1.3.1/libtool/src/gmp-6.1.2/mpn/ia64/copyd.asm (about)

     1  dnl  IA-64 mpn_copyd -- copy limb vector, decrementing.
     2  
     3  dnl  Contributed to the GNU project by Torbjorn Granlund.
     4  
     5  dnl  Copyright 2001, 2002, 2004 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 Itanium:    1
    37  C Itanium 2:  0.5
    38  
    39  C INPUT PARAMETERS
    40  C rp = r32
    41  C sp = r33
    42  C n = r34
    43  
    44  ASM_START()
    45  PROLOGUE(mpn_copyd)
    46  	.prologue
    47  	.save ar.lc, r2
    48  	.body
    49  ifdef(`HAVE_ABI_32',
    50  `	addp4		r32 = 0, r32
    51  	addp4		r33 = 0, r33
    52  	sxt4		r34 = r34
    53  	;;
    54  ')
    55  {.mmi
    56  	shladd		r32 = r34, 3, r32
    57  	shladd		r33 = r34, 3, r33
    58  	mov.i		r2 = ar.lc
    59  }
    60  {.mmi
    61  	and		r14 = 3, r34
    62  	cmp.ge		p14, p15 = 3, r34
    63  	add		r34 = -4, r34
    64  	;;
    65  }
    66  {.mmi
    67  	cmp.eq		p8, p0 = 1, r14
    68  	cmp.eq		p10, p0 = 2, r14
    69  	cmp.eq		p12, p0 = 3, r14
    70  }
    71  {.bbb
    72    (p8)	br.dptk		.Lb01
    73    (p10)	br.dptk		.Lb10
    74    (p12)	br.dptk		.Lb11
    75  }
    76  
    77  .Lb00:	C  n = 0, 4, 8, 12, ...
    78  	add		r32 = -8, r32
    79  	add		r33 = -8, r33
    80    (p14)	br.dptk		.Ls00
    81  	;;
    82  	add		r21 = -8, r33
    83  	ld8		r16 = [r33], -16
    84  	shr		r15 = r34, 2
    85  	;;
    86  	ld8		r17 = [r21], -16
    87  	mov.i		ar.lc = r15
    88  	ld8		r18 = [r33], -16
    89  	add		r20 = -8, r32
    90  	;;
    91  	ld8		r19 = [r21], -16
    92  	br.cloop.dptk	.Loop
    93  	;;
    94  	br.sptk		.Lend
    95  	;;
    96  
    97  .Lb01:	C  n = 1, 5, 9, 13, ...
    98  	add		r21 = -8, r33
    99  	add		r20 = -8, r32
   100  	add		r33 = -16, r33
   101  	add		r32 = -16, r32
   102  	;;
   103  	ld8		r19 = [r21], -16
   104  	shr		r15 = r34, 2
   105    (p14)	br.dptk		.Ls01
   106  	;;
   107  	ld8		r16 = [r33], -16
   108  	mov.i		ar.lc = r15
   109  	;;
   110  	ld8		r17 = [r21], -16
   111  	ld8		r18 = [r33], -16
   112  	br.sptk		.Li01
   113  	;;
   114  
   115  .Lb10:	C  n = 2,6, 10, 14, ...
   116  	add		r21 = -16, r33
   117  	shr		r15 = r34, 2
   118  	add		r20 = -16, r32
   119  	add		r32 = -8, r32
   120  	add		r33 = -8, r33
   121  	;;
   122  	ld8		r18 = [r33], -16
   123  	ld8		r19 = [r21], -16
   124  	mov.i		ar.lc = r15
   125    (p14)	br.dptk		.Ls10
   126  	;;
   127  	ld8		r16 = [r33], -16
   128  	ld8		r17 = [r21], -16
   129  	br.sptk		.Li10
   130  	;;
   131  
   132  .Lb11:	C  n = 3, 7, 11, 15, ...
   133  	add		r21 = -8, r33
   134  	add		r20 = -8, r32
   135  	add		r33 = -16, r33
   136  	add		r32 = -16, r32
   137  	;;
   138  	ld8		r17 = [r21], -16
   139  	shr		r15 = r34, 2
   140  	;;
   141  	ld8		r18 = [r33], -16
   142  	mov.i		ar.lc = r15
   143  	ld8		r19 = [r21], -16
   144    (p14)	br.dptk		.Ls11
   145  	;;
   146  	ld8		r16 = [r33], -16
   147  	br.sptk		.Li11
   148  	;;
   149  
   150  	ALIGN(32)
   151  .Loop:
   152  .Li00:
   153  {.mmb
   154  	st8		[r32] = r16, -16
   155  	ld8		r16 = [r33], -16
   156  	nop.b		0
   157  }
   158  .Li11:
   159  {.mmb
   160  	st8		[r20] = r17, -16
   161  	ld8		r17 = [r21], -16
   162  	nop.b		0
   163  	;;
   164  }
   165  .Li10:
   166  {.mmb
   167  	st8		[r32] = r18, -16
   168  	ld8		r18 = [r33], -16
   169  	nop.b		0
   170  }
   171  .Li01:
   172  {.mmb
   173  	st8		[r20] = r19, -16
   174  	ld8		r19 = [r21], -16
   175  	br.cloop.dptk	.Loop
   176  	;;
   177  }
   178  .Lend:	st8		[r32] = r16, -16
   179  .Ls11:	st8		[r20] = r17, -16
   180  	;;
   181  .Ls10:	st8		[r32] = r18, -16
   182  .Ls01:	st8		[r20] = r19, -16
   183  .Ls00:	mov.i		ar.lc = r2
   184  	br.ret.sptk.many b0
   185  EPILOGUE()
   186  ASM_END()