github.com/aergoio/aergo@v1.3.1/libtool/src/gmp-6.1.2/mpn/powerpc64/p7/hamdist.asm (about)

     1  dnl  PowerPC-64 mpn_hamdist.
     2  
     3  dnl  Copyright 2012 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 POWER3/PPC630          -
    35  C POWER4/PPC970          -
    36  C POWER5                 -
    37  C POWER6                 -
    38  C POWER7                 2.87
    39  
    40  define(`up', r3)
    41  define(`vp', r4)
    42  define(`n',  r5)
    43  
    44  ASM_START()
    45  PROLOGUE(mpn_hamdist)
    46  	std	r30, -16(r1)
    47  	std	r31, -8(r1)
    48  
    49  	addi	r0, n, 1
    50  ifdef(`HAVE_ABI_mode32',
    51  `	rldicl	r0, r0, 63,33',	C ...branch count
    52  `	srdi	r0, r0, 1')	C ...for ctr
    53  	mtctr	r0
    54  
    55  	andi.	r0, n, 1
    56  
    57  	li	r0, 0
    58  	li	r12, 0
    59  
    60  	beq	L(evn)
    61  
    62  L(odd):	ld	r6, 0(up)
    63  	addi	up, up, 8
    64  	ld	r8, 0(vp)
    65  	addi	vp, vp, 8
    66  	xor	r10, r6, r8
    67  	popcntd	r0, r10
    68  	bdz	L(e1)
    69  
    70  L(evn):	ld	r6, 0(up)
    71  	ld	r8, 0(vp)
    72  	ld	r7, 8(up)
    73  	ld	r9, 8(vp)
    74  	xor	r10, r6, r8
    75  	addi	up, up, 16
    76  	addi	vp, vp, 16
    77  	li	r30, 0
    78  	li	r31, 0
    79  	bdz	L(end)
    80  
    81  	nop
    82  	nop
    83  C	ALIGN(16)
    84  L(top):	add	r0, r0, r30
    85  	ld	r6, 0(up)
    86  	ld	r8, 0(vp)
    87  	xor	r11, r7, r9
    88  	popcntd	r30, r10
    89  	add	r12, r12, r31
    90  	ld	r7, 8(up)
    91  	ld	r9, 8(vp)
    92  	xor	r10, r6, r8
    93  	popcntd	r31, r11
    94  	addi	up, up, 16
    95  	addi	vp, vp, 16
    96  	bdnz	L(top)
    97  
    98  L(end):	add	r0, r0, r30
    99  	xor	r11, r7, r9
   100  	popcntd	r30, r10
   101  	add	r12, r12, r31
   102  	popcntd	r31, r11
   103  
   104  	add	r0, r0, r30
   105  	add	r12, r12, r31
   106  L(e1):	add	r3, r0, r12
   107  	ld	r30, -16(r1)
   108  	ld	r31, -8(r1)
   109  	blr
   110  EPILOGUE()