github.com/aergoio/aergo@v1.3.1/libtool/src/gmp-6.1.2/mpn/x86_64/aors_err3_n.asm (about)

     1  dnl  AMD64 mpn_add_err3_n, mpn_sub_err3_n
     2  
     3  dnl  Contributed by David Harvey.
     4  
     5  dnl  Copyright 2011 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 AMD K8,K9	 7.0
    37  C AMD K10	 ?
    38  C Intel P4	 ?
    39  C Intel core2	 ?
    40  C Intel corei	 ?
    41  C Intel atom	 ?
    42  C VIA nano	 ?
    43  
    44  C INPUT PARAMETERS
    45  define(`rp',	`%rdi')
    46  define(`up',	`%rsi')
    47  define(`vp',	`%rdx')
    48  define(`ep',	`%rcx')
    49  define(`yp1',	`%r8')
    50  define(`yp2',   `%r9')
    51  define(`yp3_param',   `8(%rsp)')
    52  define(`n_param',     `16(%rsp)')
    53  define(`cy_param',    `24(%rsp)')
    54  
    55  define(`n',     `%r10')
    56  define(`yp3',   `%rcx')
    57  define(`t',     `%rbx')
    58  
    59  define(`e1l',	`%rbp')
    60  define(`e1h',	`%r11')
    61  define(`e2l',	`%r12')
    62  define(`e2h',	`%r13')
    63  define(`e3l',   `%r14')
    64  define(`e3h',   `%r15')
    65  
    66  
    67  
    68  ifdef(`OPERATION_add_err3_n', `
    69  	define(ADCSBB,	      adc)
    70  	define(func,	      mpn_add_err3_n)')
    71  ifdef(`OPERATION_sub_err3_n', `
    72  	define(ADCSBB,	      sbb)
    73  	define(func,	      mpn_sub_err3_n)')
    74  
    75  MULFUNC_PROLOGUE(mpn_add_err3_n mpn_sub_err3_n)
    76  
    77  
    78  ASM_START()
    79  	TEXT
    80  	ALIGN(16)
    81  PROLOGUE(func)
    82  	mov	cy_param, %rax
    83  	mov	n_param, n
    84  
    85  	push	%rbx
    86  	push	%rbp
    87  	push	%r12
    88  	push	%r13
    89  	push	%r14
    90  	push	%r15
    91  
    92  	push	ep
    93  	mov	64(%rsp), yp3       C load from yp3_param
    94  
    95  	xor	R32(e1l), R32(e1l)
    96  	xor	R32(e1h), R32(e1h)
    97  	xor	R32(e2l), R32(e2l)
    98  	xor	R32(e2h), R32(e2h)
    99  	xor	R32(e3l), R32(e3l)
   100  	xor	R32(e3h), R32(e3h)
   101  
   102  	sub	yp1, yp2
   103  	sub	yp1, yp3
   104  
   105  	lea	-8(yp1,n,8), yp1
   106  	lea	(rp,n,8), rp
   107  	lea	(up,n,8), up
   108  	lea	(vp,n,8), vp
   109  	neg	n
   110  
   111  	ALIGN(16)
   112  L(top):
   113  	shr	$1, %rax		C restore carry
   114  	mov	(up,n,8), %rax
   115  	ADCSBB	(vp,n,8), %rax
   116  	mov	%rax, (rp,n,8)
   117  	sbb	%rax, %rax		C save carry and generate mask
   118  
   119  	mov	(yp1), t
   120  	and	%rax, t
   121  	add	t, e1l
   122  	adc	$0, e1h
   123  
   124  	mov	(yp1,yp2), t
   125  	and	%rax, t
   126  	add	t, e2l
   127  	adc	$0, e2h
   128  
   129  	mov	(yp1,yp3), t
   130  	and	%rax, t
   131  	add	t, e3l
   132  	adc	$0, e3h
   133  
   134  	lea	-8(yp1), yp1
   135  	inc	n
   136  	jnz     L(top)
   137  
   138  L(end):
   139  	and	$1, %eax
   140  	pop	ep
   141  
   142  	mov	e1l, (ep)
   143  	mov	e1h, 8(ep)
   144  	mov	e2l, 16(ep)
   145  	mov	e2h, 24(ep)
   146  	mov	e3l, 32(ep)
   147  	mov	e3h, 40(ep)
   148  
   149  	pop	%r15
   150  	pop	%r14
   151  	pop	%r13
   152  	pop	%r12
   153  	pop	%rbp
   154  	pop	%rbx
   155  	ret
   156  EPILOGUE()