1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/* Copyright (C) 2000 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/* File : bfill.c
Author : Richard A. O'Keefe.
Michael Widenius; ifdef MC68000
Updated: 23 April 1984
Defines: bfill()
bfill(dst, len, fill) moves "len" fill characters to "dst".
Thus to set a buffer to 80 spaces, do bfill(buff, 80, ' ').
Note: the "b" routines are there to exploit certain VAX order codes,
but the MOVC5 instruction will only move 65535 characters. The asm
code is presented for your interest and amusement.
*/
#include <my_global.h>
#include "m_string.h"
#if !defined(bfill) && !defined(HAVE_BFILL)
#if VaxAsm
void bfill(dst, len, fill)
char *dst;
uint len;
int fill; /* actually char */
{
asm("movc5 $0,*4(ap),12(ap),8(ap),*4(ap)");
}
#elif defined(MC68000) && defined(DS90)
void bfill(dst, len,fill) /* Optimized with long-fill */
char *dst;
uint len;
pchar fill;
{
asm(" movl 8.(a7),d1 ");
asm(" jeq .L9 ");
asm(" movl 4.(a7),a0 ");
asm(" moveq #0,d0 ");
asm(" movb 15.(a7),d0 ");
asm(" movl d2,a1 ");
asm(" movw d0,d2 ");
asm(" aslw #8,d0 ");
asm(" orw d2,d0 ");
asm(" movl d0,d2 ");
asm(" swap d0 ");
asm(" orl d2,d0 ");
asm(" movl a0,d2 ");
asm(" btst #0,d2 ");
asm(" jeq .L1 ");
asm(" movb d0,(a0)+ ");
asm(" subql #1,d1 ");
asm(".L1: movl d1,d2 ");
asm(" lsrl #2,d2 ");
asm(" jcc .L2 ");
asm(" movw d0,(a0)+ ");
asm(" jra .L2 ");
asm(".L3: movl d0,(a0)+ ");
asm(".L2: dbra d2,.L3 ");
asm(" addqw #1,d2 ");
asm(" subql #1,d2 ");
asm(" jcc .L3 ");
asm(" andl #1,d1 ");
asm(" jeq .L8 ");
asm(" movb d0,(a0) ");
asm(".L8: movl a1,d2 ");
asm(".L9: rts ");
}
#else
void bfill(dst, len, fill)
register byte *dst;
register uint len;
register pchar fill;
{
while (len-- != 0) *dst++ = fill;
}
#endif
#endif
|
