github.com/aergoio/aergo@v1.3.1/libtool/src/gmp-6.1.2/mpn/x86_64/bobcat/mul_1.asm (about)

     1  dnl  AMD64 mpn_mul_1 optimised for AMD bobcat.
     2  
     3  dnl  Copyright 2003-2005, 2007, 2008, 2011, 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 AMD K8,K9	 4.5
    35  C AMD K10	 4.5
    36  C AMD bd1	 4.62
    37  C AMD bobcat	 5
    38  C Intel P4	14
    39  C Intel core2	 4.5
    40  C Intel NHM	 4.23
    41  C Intel SBR	 3.0
    42  C Intel atom	21
    43  C VIA nano	 4.94
    44  
    45  C The loop of this code is the result of running a code generation and
    46  C optimisation tool suite written by David Harvey and Torbjorn Granlund.
    47  
    48  ABI_SUPPORT(DOS64)
    49  ABI_SUPPORT(STD64)
    50  
    51  C Standard parameters
    52  define(`rp',              `%rdi')
    53  define(`up',              `%rsi')
    54  define(`n_param',         `%rdx')
    55  define(`v0',              `%rcx')
    56  define(`cy',              `%r8')
    57  C Standard allocations
    58  define(`n',               `%rbx')
    59  define(`w0',              `%r8')
    60  define(`w1',              `%r9')
    61  define(`w2',              `%r10')
    62  define(`w3',              `%r11')
    63  
    64  C DOS64 parameters
    65  IFDOS(` define(`rp',      `%rcx')    ') dnl
    66  IFDOS(` define(`up',      `%rsi')    ') dnl
    67  IFDOS(` define(`n_param', `%r8')     ') dnl
    68  IFDOS(` define(`v0',      `%r9')     ') dnl
    69  IFDOS(` define(`cy',      `56(%rsp)')') dnl
    70  C DOS64 allocations
    71  IFDOS(` define(`n',       `%rbx')    ') dnl
    72  IFDOS(` define(`w0',      `%r8')     ') dnl
    73  IFDOS(` define(`w1',      `%rdi')    ') dnl
    74  IFDOS(` define(`w2',      `%r10')    ') dnl
    75  IFDOS(` define(`w3',      `%r11')    ') dnl
    76  
    77  ASM_START()
    78  	TEXT
    79  	ALIGN(16)
    80  PROLOGUE(mpn_mul_1c)
    81  IFDOS(`	push	%rsi		')
    82  IFDOS(`	push	%rdi		')
    83  IFDOS(`	mov	%rdx, %rsi	')
    84  	mov	cy, w2
    85  	jmp	L(com)
    86  EPILOGUE()
    87  
    88  PROLOGUE(mpn_mul_1)
    89  IFDOS(`	push	%rsi		')
    90  IFDOS(`	push	%rdi		')
    91  IFDOS(`	mov	%rdx, %rsi	')
    92  	xor	w2, w2
    93  L(com):	push	%rbx
    94  	mov	(up), %rax
    95  
    96  	lea	-16(rp,n_param,8), rp
    97  	lea	-16(up,n_param,8), up
    98  
    99  	mov	n_param, n
   100  	and	$3, R32(n_param)
   101  	jz	L(b0)
   102  	cmp	$2, R32(n_param)
   103  	ja	L(b3)
   104  	jz	L(b2)
   105  
   106  L(b1):	mul	v0
   107  	cmp	$1, n
   108  	jz	L(n1)
   109  	neg	n
   110  	add	$3, n
   111  	add	%rax, w2
   112  	mov	%rdx, w3
   113  	jmp	L(L1)
   114  L(n1):	add	%rax, w2
   115  	mov	%rdx, %rax
   116  	mov	w2, 8(rp)
   117  	adc	$0, %rax
   118  	pop	%rbx
   119  IFDOS(`	pop	%rdi		')
   120  IFDOS(`	pop	%rsi		')
   121  	ret
   122  
   123  L(b3):	mul	v0
   124  	neg	n
   125  	inc	n
   126  	add	%rax, w2
   127  	mov	%rdx, w3
   128  	jmp	L(L3)
   129  
   130  L(b0):	mul	v0
   131  	mov	%rax, w0
   132  	mov	%rdx, w1
   133  	neg	n
   134  	add	$2, n
   135  	add	w2, w0
   136  	jmp	L(L0)
   137  
   138  L(b2):	mul	v0
   139  	mov	%rax, w0
   140  	mov	%rdx, w1
   141  	neg	n
   142  	add	w2, w0
   143  	jmp	L(L2)
   144  
   145  	ALIGN(16)
   146  L(top):	mov	w0, -16(rp,n,8)
   147  	add	w1, w2
   148  L(L1):	adc	$0, w3
   149  	mov	0(up,n,8), %rax
   150  	mul	v0
   151  	mov	%rax, w0
   152  	mov	%rdx, w1
   153  	mov	w2, -8(rp,n,8)
   154  	add	w3, w0
   155  L(L0):	adc	$0, w1
   156  	mov	8(up,n,8), %rax
   157  	mul	v0
   158  	mov	%rax, w2
   159  	mov	%rdx, w3
   160  	mov	w0, 0(rp,n,8)
   161  	add	w1, w2
   162  L(L3):	adc	$0, w3
   163  	mov	16(up,n,8), %rax
   164  	mul	v0
   165  	mov	%rax, w0
   166  	mov	%rdx, w1
   167  	mov	w2, 8(rp,n,8)
   168  	add	w3, w0
   169  L(L2):	adc	$0, w1
   170  	mov	24(up,n,8), %rax
   171  	mul	v0
   172  	mov	%rax, w2
   173  	mov	%rdx, w3
   174  	add	$4, n
   175  	js	L(top)
   176  
   177  L(end):	mov	w0, (rp)
   178  	add	w1, w2
   179  	adc	$0, w3
   180  	mov	w2, 8(rp)
   181  	mov	w3, %rax
   182  
   183  	pop	%rbx
   184  IFDOS(`	pop	%rdi		')
   185  IFDOS(`	pop	%rsi		')
   186  	ret
   187  EPILOGUE()