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

     1  dnl  PowerPC-64 mpn_copyd
     2  
     3  dnl  Copyright 2004, 2005 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          1
    35  C POWER4/PPC970          1
    36  C POWER5                 ?
    37  C POWER6                 ?
    38  C POWER7                 1.4
    39  
    40  C INPUT PARAMETERS
    41  C rp	r3
    42  C up	r4
    43  C n	r5
    44  
    45  ASM_START()
    46  PROLOGUE(mpn_copyd)
    47  	rldic.	r0, r5, 3, 59	C r0 = (r5 & 3) << 3; cr0 = (n == 4t)?
    48  	cmpldi	cr6, r0, 16	C cr6 = (n cmp 4t + 2)?
    49  
    50  ifdef(`HAVE_ABI_mode32',
    51  `	rldic	r6, r5, 3, 32',	C byte count corresponding to n
    52  `	rldicr	r6, r5, 3, 60')	C byte count corresponding to n
    53  
    54  	addi	r5, r5, 4	C compute...
    55  ifdef(`HAVE_ABI_mode32',
    56  `	rldicl	r5, r5, 62,34',	C ...branch count
    57  `	rldicl	r5, r5, 62, 2')	C ...branch count
    58  	mtctr	r5
    59  
    60  	add	r4, r4, r6
    61  	add	r3, r3, r6
    62  	sub	r4, r4, r0	C offset up
    63  	sub	r3, r3, r0	C offset rp
    64  
    65  	beq	cr0, L(L00)
    66  	blt	cr6, L(L01)
    67  	beq	cr6, L(L10)
    68  	b	L(L11)
    69  
    70  	ALIGN(16)
    71  L(oop):	ld	r6, 24(r4)
    72  	std	r6, 24(r3)
    73  L(L11):	ld	r6, 16(r4)
    74  	std	r6, 16(r3)
    75  L(L10):	ld	r6, 8(r4)
    76  	std	r6, 8(r3)
    77  L(L01):	ld	r6, 0(r4)
    78  	std	r6, 0(r3)
    79  L(L00):	addi	r4, r4, -32
    80  	addi	r3, r3, -32
    81  	bdnz	L(oop)
    82  
    83  	blr
    84  EPILOGUE()