github.com/aergoio/aergo@v1.3.1/libtool/src/gmp-6.1.2/mpn/x86/atom/lshiftc.asm (about)

     1  dnl  Intel Atom mpn_lshiftc -- mpn left shift with complement.
     2  
     3  dnl  Copyright 2011 Free Software Foundation, Inc.
     4  
     5  dnl  Contributed to the GNU project by Torbjorn Granlund and Marco Bodrato.
     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 mp_limb_t mpn_lshiftc (mp_ptr dst, mp_srcptr src, mp_size_t size,
    36  C			 unsigned cnt);
    37  
    38  C				cycles/limb
    39  C P5
    40  C P6 model 0-8,10-12
    41  C P6 model 9  (Banias)
    42  C P6 model 13 (Dothan)
    43  C P4 model 0  (Willamette)
    44  C P4 model 1  (?)
    45  C P4 model 2  (Northwood)
    46  C P4 model 3  (Prescott)
    47  C P4 model 4  (Nocona)
    48  C Intel Atom			 5.5
    49  C AMD K6
    50  C AMD K7
    51  C AMD K8
    52  C AMD K10
    53  
    54  defframe(PARAM_CNT, 16)
    55  defframe(PARAM_SIZE,12)
    56  defframe(PARAM_SRC,  8)
    57  defframe(PARAM_DST,  4)
    58  
    59  dnl  re-use parameter space
    60  define(SAVE_UP,`PARAM_CNT')
    61  define(VAR_COUNT,`PARAM_SIZE')
    62  define(SAVE_EBX,`PARAM_SRC')
    63  define(SAVE_EBP,`PARAM_DST')
    64  
    65  define(`rp',  `%edi')
    66  define(`up',  `%esi')
    67  define(`cnt',  `%ecx')
    68  
    69  ASM_START()
    70  	TEXT
    71  
    72  PROLOGUE(mpn_lshiftc)
    73  deflit(`FRAME',0)
    74  	mov	PARAM_CNT, cnt
    75  	mov	PARAM_SIZE, %edx
    76  	mov	up, SAVE_UP
    77  	mov	PARAM_SRC, up
    78  	push	rp			FRAME_pushl()
    79  	mov	PARAM_DST, rp
    80  
    81  	lea	-4(up,%edx,4), up
    82  	mov	%ebx, SAVE_EBX
    83  	lea	-4(rp,%edx,4), rp
    84  
    85  	shr	%edx
    86  	mov	(up), %eax
    87  	mov	%edx, VAR_COUNT
    88  	jnc	L(evn)
    89  
    90  	mov	%eax, %ebx
    91  	shl	%cl, %ebx
    92  	neg	cnt
    93  	shr	%cl, %eax
    94  	test	%edx, %edx
    95  	jnz	L(gt1)
    96  	not	%ebx
    97  	mov	%ebx, (rp)
    98  	jmp	L(quit)
    99  
   100  L(gt1):	mov	%ebp, SAVE_EBP
   101  	push	%eax
   102  	mov	-4(up), %eax
   103  	mov	%eax, %ebp
   104  	shr	%cl, %eax
   105  	jmp	L(lo1)
   106  
   107  L(evn):	mov	%ebp, SAVE_EBP
   108  	neg	cnt
   109  	mov	%eax, %ebp
   110  	mov	-4(up), %edx
   111  	shr	%cl, %eax
   112  	mov	%edx, %ebx
   113  	shr	%cl, %edx
   114  	neg	cnt
   115  	decl	VAR_COUNT
   116  	lea	4(rp), rp
   117  	lea	-4(up), up
   118  	jz	L(end)
   119  	push	%eax			FRAME_pushl()
   120  
   121  L(top):	shl	%cl, %ebp
   122  	or	%ebp, %edx
   123  	shl	%cl, %ebx
   124  	neg	cnt
   125  	not	%edx
   126  	mov	-4(up), %eax
   127  	mov	%eax, %ebp
   128  	mov	%edx, -4(rp)
   129  	shr	%cl, %eax
   130  	lea	-8(rp), rp
   131  L(lo1):	mov	-8(up), %edx
   132  	or	%ebx, %eax
   133  	mov	%edx, %ebx
   134  	shr	%cl, %edx
   135  	not	%eax
   136  	lea	-8(up), up
   137  	neg	cnt
   138  	mov	%eax, (rp)
   139  	decl	VAR_COUNT
   140  	jg	L(top)
   141  
   142  	pop	%eax			FRAME_popl()
   143  L(end):
   144  	shl	%cl, %ebp
   145  	shl	%cl, %ebx
   146  	or	%ebp, %edx
   147  	mov	SAVE_EBP, %ebp
   148  	not	%edx
   149  	not	%ebx
   150  	mov	%edx, -4(rp)
   151  	mov	%ebx, -8(rp)
   152  
   153  L(quit):
   154  	mov	SAVE_UP, up
   155  	mov	SAVE_EBX, %ebx
   156  	pop	rp			FRAME_popl()
   157  	ret
   158  EPILOGUE()
   159  ASM_END()