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/*
 * memset routine for Z8000
 * Copyright (C) 2004 Christian Groessler 
 *
 * Permission to use, copy, modify, and distribute this file
 * for any purpose is hereby granted without fee, provided that
 * the above copyright notice and this notice appears in all
 * copies.
 *
 * This file is distributed WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 */
 
/* void *memset(void *buffer, int value, size_t length);
 */
 
        name    "memset.S"
 
        .text
        even
global  _memset
 
_memset:
 
#ifdef __Z8001__
        segm
 
#ifdef __STD_CALL__
        ldl     rr6,rr14(#4)
        ld      r5,rr14(#8)
        ldl     rr2,rr14(#10)
#else
        pushl   @rr14,rr6
#endif
 
/* rr2  - length
 * rl5  - value
 * rr6  - buffer
 */
        testl   rr2
        jr      z,finish
 
        ldb     rh5,rl5
        ld      r1,r5           /* r1 contains value */
        bit     r7,#0
        jr      z,not_odd
 
        ldb     @rr6,rl1
        inc     r7,#1
        subl    rr2,#1
        jr      z,finish
 
not_odd:ld      r0,r3           /* remember length */
        srl     r3,#1
        jr      z,no_words
 
        ldl     rr4,rr6
        ld      @rr6,r1
        inc     r7,#2
        dec     r3,#1
        jr      z,no_words
 
        ldir    @rr6,@rr4,r3    /* fill words */
 
no_words:
        bit     r0,#0           /* one byte remaining? */
        jr      z,finish
 
        ldb     @rr6,rl1
 
finish:
#ifdef __STD_CALL__
        ldl     rr6,rr14(#4)
#else
        popl    rr2,@rr14
#endif
 
 
#else           /* above Z8001, below Z8002 */
 
 
        unsegm
 
#ifdef __STD_CALL__
        ld      r7,r15(#2)
        ld      r6,r15(#4)
        ld      r5,r15(#6)
#else
        ld      r2,r7           /* buffer pointer return value */
#endif
 
/* r5  - length
 * r6  - value
 * r7  - buffer
 */
        test    r5
        jr      z,finish
 
        ldb     rh6,rl6
        ld      r1,r6           /* r1 contains value */
        bit     r7,#0
        jr      z,not_odd
 
        ldb     @r7,rl1
        inc     r7,#1
        dec     r5,#1
        jr      z,finish
 
not_odd:ld      r0,r5           /* remember length */
        srl     r5,#1
        jr      z,no_words
 
        ld      r4,r7
        ld      @r7,r1
        inc     r7,#2
        dec     r5,#1
        jr      z,no_words
 
        ldir    @r7,@r4,r5      /* fill words */
 
no_words:
        bit     r0,#0           /* one byte remaining? */
        jr      z,finish
 
        ldb     @r7,rl1
 
finish:
#ifdef __STD_CALL__
        ld      r7,r15(#2)
#endif
 
#endif  /* Z8002 */
 
        ret
        .end

Line No.	Rev	Author	Line
1	207	jeremybenn	`/*`
2			`* memset routine for Z8000`
3			`* Copyright (C) 2004 Christian Groessler`
4			`*`
5			`* Permission to use, copy, modify, and distribute this file`
6			`* for any purpose is hereby granted without fee, provided that`
7			`* the above copyright notice and this notice appears in all`
8			`* copies.`
9			`*`
10			`* This file is distributed WITHOUT ANY WARRANTY; without even the implied`
11			`* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.`
12			`*/`
13
14			`/* void memset(void buffer, int value, size_t length);`
15			`*/`
16
17			`name "memset.S"`
18
19			`.text`
20			`even`
21			`global _memset`
22
23			`_memset:`
24
25			`#ifdef __Z8001__`
26			`segm`
27
28			`#ifdef __STD_CALL__`
29			`ldl rr6,rr14(#4)`
30			`ld r5,rr14(#8)`
31			`ldl rr2,rr14(#10)`
32			`#else`
33			`pushl @rr14,rr6`
34			`#endif`
35
36			`/* rr2 - length`
37			`* rl5 - value`
38			`* rr6 - buffer`
39			`*/`
40			`testl rr2`
41			`jr z,finish`
42
43			`ldb rh5,rl5`
44			`ld r1,r5 /* r1 contains value */`
45			`bit r7,#0`
46			`jr z,not_odd`
47
48			`ldb @rr6,rl1`
49			`inc r7,#1`
50			`subl rr2,#1`
51			`jr z,finish`
52
53			`not_odd:ld r0,r3 /* remember length */`
54			`srl r3,#1`
55			`jr z,no_words`
56
57			`ldl rr4,rr6`
58			`ld @rr6,r1`
59			`inc r7,#2`
60			`dec r3,#1`
61			`jr z,no_words`
62
63			`ldir @rr6,@rr4,r3 /* fill words */`
64
65			`no_words:`
66			`bit r0,#0 /* one byte remaining? */`
67			`jr z,finish`
68
69			`ldb @rr6,rl1`
70
71			`finish:`
72			`#ifdef __STD_CALL__`
73			`ldl rr6,rr14(#4)`
74			`#else`
75			`popl rr2,@rr14`
76			`#endif`
77
78
79			`#else /* above Z8001, below Z8002 */`
80
81
82			`unsegm`
83
84			`#ifdef __STD_CALL__`
85			`ld r7,r15(#2)`
86			`ld r6,r15(#4)`
87			`ld r5,r15(#6)`
88			`#else`
89			`ld r2,r7 /* buffer pointer return value */`
90			`#endif`
91
92			`/* r5 - length`
93			`* r6 - value`
94			`* r7 - buffer`
95			`*/`
96			`test r5`
97			`jr z,finish`
98
99			`ldb rh6,rl6`
100			`ld r1,r6 /* r1 contains value */`
101			`bit r7,#0`
102			`jr z,not_odd`
103
104			`ldb @r7,rl1`
105			`inc r7,#1`
106			`dec r5,#1`
107			`jr z,finish`
108
109			`not_odd:ld r0,r5 /* remember length */`
110			`srl r5,#1`
111			`jr z,no_words`
112
113			`ld r4,r7`
114			`ld @r7,r1`
115			`inc r7,#2`
116			`dec r5,#1`
117			`jr z,no_words`
118
119			`ldir @r7,@r4,r5 /* fill words */`
120
121			`no_words:`
122			`bit r0,#0 /* one byte remaining? */`
123			`jr z,finish`
124
125			`ldb @r7,rl1`
126
127			`finish:`
128			`#ifdef __STD_CALL__`
129			`ld r7,r15(#2)`
130			`#endif`
131
132			`#endif /* Z8002 */`
133
134			`ret`
135			`.end`

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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [machine/] [z8k/] [memset.S] - Blame information for rev 301