github.com/aergoio/aergo@v1.3.1/libtool/src/gmp-6.1.2/mpn/s390_32/copyd.asm (about)

     1  dnl  S/390-32 mpn_copyd
     2  
     3  dnl  Copyright 2011 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  
    32  include(`../config.m4')
    33  
    34  C            cycles/limb
    35  C            cycles/limb
    36  C z900		 1.65
    37  C z990           1.125
    38  C z9		 ?
    39  C z10		 ?
    40  C z196		 ?
    41  
    42  C FIXME:
    43  C  * Avoid saving/restoring callee-saves registers for n < 3.  This could be
    44  C    done by setting rp=r1, up=r2, i=r0 and r3,r4,r5 for clock regs.
    45  C    We could then use r3...r10 in main loop.
    46  
    47  C INPUT PARAMETERS
    48  define(`rp_param',	`%r2')
    49  define(`up_param',	`%r3')
    50  define(`n',		`%r4')
    51  
    52  define(`rp',	`%r8')
    53  define(`up',	`%r9')
    54  
    55  ASM_START()
    56  PROLOGUE(mpn_copyd)
    57  	stm	%r6, %r11, 24(%r15)
    58  
    59  	lr	%r1, n
    60  	sll	%r1, 2
    61  	la	%r10, 8(n)
    62  	ahi	%r1, -32
    63  	srl	%r10, 3
    64  	lhi	%r11, -32
    65  
    66  	la	rp, 0(%r1,rp_param)	C FIXME use lay on z990 and later
    67  	la	up, 0(%r1,up_param)	C FIXME use lay on z990 and later
    68  
    69  	lhi	%r7, 7
    70  	nr	%r7, n			C n mod 8
    71  	chi	%r7, 2
    72  	jh	L(b34567)
    73  	chi	%r7, 1
    74  	je	L(b1)
    75  	jh	L(b2)
    76  
    77  L(b0):	brct	%r10, L(top)
    78  	j	L(end)
    79  
    80  L(b1):	l	%r0, 28(up)
    81  	ahi	up, -4
    82  	st	%r0, 28(rp)
    83  	ahi	rp, -4
    84  	brct	%r10, L(top)
    85  	j	L(end)
    86  
    87  L(b2):	lm	%r0, %r1, 24(up)
    88  	ahi	up, -8
    89  	stm	%r0, %r1, 24(rp)
    90  	ahi	rp, -8
    91  	brct	%r10, L(top)
    92  	j	L(end)
    93  
    94  L(b34567):
    95  	chi	%r7, 4
    96  	jl	L(b3)
    97  	je	L(b4)
    98  	chi	%r7, 6
    99  	je	L(b6)
   100  	jh	L(b7)
   101  
   102  L(b5):	lm	%r0, %r4, 12(up)
   103  	ahi	up, -20
   104  	stm	%r0, %r4, 12(rp)
   105  	ahi	rp, -20
   106  	brct	%r10, L(top)
   107  	j	L(end)
   108  
   109  L(b3):	lm	%r0, %r2, 20(up)
   110  	ahi	up, -12
   111  	stm	%r0, %r2, 20(rp)
   112  	ahi	rp, -12
   113  	brct	%r10, L(top)
   114  	j	L(end)
   115  
   116  L(b4):	lm	%r0, %r3, 16(up)
   117  	ahi	up, -16
   118  	stm	%r0, %r3, 16(rp)
   119  	ahi	rp, -16
   120  	brct	%r10, L(top)
   121  	j	L(end)
   122  
   123  L(b6):	lm	%r0, %r5, 8(up)
   124  	ahi	up, -24
   125  	stm	%r0, %r5, 8(rp)
   126  	ahi	rp, -24
   127  	brct	%r10, L(top)
   128  	j	L(end)
   129  
   130  L(b7):	lm	%r0, %r6, 4(up)
   131  	ahi	up, -28
   132  	stm	%r0, %r6, 4(rp)
   133  	ahi	rp, -28
   134  	brct	%r10, L(top)
   135  	j	L(end)
   136  
   137  L(top):	lm	%r0, %r7, 0(up)
   138  	la	up, 0(%r11,up)
   139  	stm	%r0, %r7, 0(rp)
   140  	la	rp, 0(%r11,rp)
   141  	brct	%r10, L(top)
   142  
   143  L(end):	lm	%r6, %r11, 24(%r15)
   144  	br	%r14
   145  EPILOGUE()