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1 | /* |
1 | /* |
2 | * Copyright (C) 2005 Sergey Bondari |
2 | * Copyright (C) 2005 Sergey Bondari |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup ia32 |
29 | /** @addtogroup ia32 |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #ifndef __ia32_MEMSTR_H__ |
35 | #ifndef __ia32_MEMSTR_H__ |
36 | #define __ia32_MEMSTR_H__ |
36 | #define __ia32_MEMSTR_H__ |
37 | 37 | ||
38 | /** Copy memory |
38 | /** Copy memory |
39 | * |
39 | * |
40 | * Copy a given number of bytes (3rd argument) |
40 | * Copy a given number of bytes (3rd argument) |
41 | * from the memory location defined by 2nd argument |
41 | * from the memory location defined by 2nd argument |
42 | * to the memory location defined by 1st argument. |
42 | * to the memory location defined by 1st argument. |
43 | * The memory areas cannot overlap. |
43 | * The memory areas cannot overlap. |
44 | * |
44 | * |
45 | * @param dst Destination |
45 | * @param dst Destination |
46 | * @param src Source |
46 | * @param src Source |
47 | * @param cnt Number of bytes |
47 | * @param cnt Number of bytes |
48 | * @return Destination |
48 | * @return Destination |
49 | */ |
49 | */ |
50 | static inline void * memcpy(void * dst, const void * src, size_t cnt) |
50 | static inline void * memcpy(void * dst, const void * src, size_t cnt) |
51 | { |
51 | { |
52 | __native d0, d1, d2; |
52 | unative_t d0, d1, d2; |
53 | 53 | ||
54 | __asm__ __volatile__( |
54 | __asm__ __volatile__( |
55 | /* copy all full dwords */ |
55 | /* copy all full dwords */ |
56 | "rep movsl\n\t" |
56 | "rep movsl\n\t" |
57 | /* load count again */ |
57 | /* load count again */ |
58 | "movl %4, %%ecx\n\t" |
58 | "movl %4, %%ecx\n\t" |
59 | /* ecx = ecx mod 4 */ |
59 | /* ecx = ecx mod 4 */ |
60 | "andl $3, %%ecx\n\t" |
60 | "andl $3, %%ecx\n\t" |
61 | /* are there last <=3 bytes? */ |
61 | /* are there last <=3 bytes? */ |
62 | "jz 1f\n\t" |
62 | "jz 1f\n\t" |
63 | /* copy last <=3 bytes */ |
63 | /* copy last <=3 bytes */ |
64 | "rep movsb\n\t" |
64 | "rep movsb\n\t" |
65 | /* exit from asm block */ |
65 | /* exit from asm block */ |
66 | "1:\n" |
66 | "1:\n" |
67 | : "=&c" (d0), "=&D" (d1), "=&S" (d2) |
67 | : "=&c" (d0), "=&D" (d1), "=&S" (d2) |
68 | : "0" ((__native) (cnt / 4)), "g" ((__native) cnt), "1" ((__native) dst), "2" ((__native) src) |
68 | : "0" ((unative_t) (cnt / 4)), "g" ((unative_t) cnt), "1" ((unative_t) dst), "2" ((unative_t) src) |
69 | : "memory"); |
69 | : "memory"); |
70 | 70 | ||
71 | return dst; |
71 | return dst; |
72 | } |
72 | } |
73 | 73 | ||
74 | 74 | ||
75 | /** Compare memory regions for equality |
75 | /** Compare memory regions for equality |
76 | * |
76 | * |
77 | * Compare a given number of bytes (3rd argument) |
77 | * Compare a given number of bytes (3rd argument) |
78 | * at memory locations defined by 1st and 2nd argument |
78 | * at memory locations defined by 1st and 2nd argument |
79 | * for equality. If bytes are equal function returns 0. |
79 | * for equality. If bytes are equal function returns 0. |
80 | * |
80 | * |
81 | * @param src Region 1 |
81 | * @param src Region 1 |
82 | * @param dst Region 2 |
82 | * @param dst Region 2 |
83 | * @param cnt Number of bytes |
83 | * @param cnt Number of bytes |
84 | * @return Zero if bytes are equal, non-zero otherwise |
84 | * @return Zero if bytes are equal, non-zero otherwise |
85 | */ |
85 | */ |
86 | static inline int memcmp(const void * src, const void * dst, size_t cnt) |
86 | static inline int memcmp(const void * src, const void * dst, size_t cnt) |
87 | { |
87 | { |
88 | __u32 d0, d1, d2; |
88 | uint32_t d0, d1, d2; |
89 | int ret; |
89 | int ret; |
90 | 90 | ||
91 | __asm__ ( |
91 | __asm__ ( |
92 | "repe cmpsb\n\t" |
92 | "repe cmpsb\n\t" |
93 | "je 1f\n\t" |
93 | "je 1f\n\t" |
94 | "movl %3, %0\n\t" |
94 | "movl %3, %0\n\t" |
95 | "addl $1, %0\n\t" |
95 | "addl $1, %0\n\t" |
96 | "1:\n" |
96 | "1:\n" |
97 | : "=a" (ret), "=%S" (d0), "=&D" (d1), "=&c" (d2) |
97 | : "=a" (ret), "=%S" (d0), "=&D" (d1), "=&c" (d2) |
98 | : "0" (0), "1" ((__native) src), "2" ((__native) dst), "3" ((__native) cnt) |
98 | : "0" (0), "1" ((unative_t) src), "2" ((unative_t) dst), "3" ((unative_t) cnt) |
99 | ); |
99 | ); |
100 | 100 | ||
101 | return ret; |
101 | return ret; |
102 | } |
102 | } |
103 | 103 | ||
104 | /** Fill memory with words |
104 | /** Fill memory with words |
105 | * Fill a given number of words (2nd argument) |
105 | * Fill a given number of words (2nd argument) |
106 | * at memory defined by 1st argument with the |
106 | * at memory defined by 1st argument with the |
107 | * word value defined by 3rd argument. |
107 | * word value defined by 3rd argument. |
108 | * |
108 | * |
109 | * @param dst Destination |
109 | * @param dst Destination |
110 | * @param cnt Number of words |
110 | * @param cnt Number of words |
111 | * @param x Value to fill |
111 | * @param x Value to fill |
112 | */ |
112 | */ |
113 | static inline void memsetw(__address dst, size_t cnt, __u16 x) |
113 | static inline void memsetw(uintptr_t dst, size_t cnt, uint16_t x) |
114 | { |
114 | { |
115 | __u32 d0, d1; |
115 | uint32_t d0, d1; |
116 | 116 | ||
117 | __asm__ __volatile__ ( |
117 | __asm__ __volatile__ ( |
118 | "rep stosw\n\t" |
118 | "rep stosw\n\t" |
119 | : "=&D" (d0), "=&c" (d1), "=a" (x) |
119 | : "=&D" (d0), "=&c" (d1), "=a" (x) |
120 | : "0" (dst), "1" (cnt), "2" (x) |
120 | : "0" (dst), "1" (cnt), "2" (x) |
121 | : "memory" |
121 | : "memory" |
122 | ); |
122 | ); |
123 | 123 | ||
124 | } |
124 | } |
125 | 125 | ||
126 | /** Fill memory with bytes |
126 | /** Fill memory with bytes |
127 | * Fill a given number of bytes (2nd argument) |
127 | * Fill a given number of bytes (2nd argument) |
128 | * at memory defined by 1st argument with the |
128 | * at memory defined by 1st argument with the |
129 | * word value defined by 3rd argument. |
129 | * word value defined by 3rd argument. |
130 | * |
130 | * |
131 | * @param dst Destination |
131 | * @param dst Destination |
132 | * @param cnt Number of bytes |
132 | * @param cnt Number of bytes |
133 | * @param x Value to fill |
133 | * @param x Value to fill |
134 | */ |
134 | */ |
135 | static inline void memsetb(__address dst, size_t cnt, __u8 x) |
135 | static inline void memsetb(uintptr_t dst, size_t cnt, uint8_t x) |
136 | { |
136 | { |
137 | __u32 d0, d1; |
137 | uint32_t d0, d1; |
138 | 138 | ||
139 | __asm__ __volatile__ ( |
139 | __asm__ __volatile__ ( |
140 | "rep stosb\n\t" |
140 | "rep stosb\n\t" |
141 | : "=&D" (d0), "=&c" (d1), "=a" (x) |
141 | : "=&D" (d0), "=&c" (d1), "=a" (x) |
142 | : "0" (dst), "1" (cnt), "2" (x) |
142 | : "0" (dst), "1" (cnt), "2" (x) |
143 | : "memory" |
143 | : "memory" |
144 | ); |
144 | ); |
145 | 145 | ||
146 | } |
146 | } |
147 | 147 | ||
148 | #endif |
148 | #endif |
149 | 149 | ||
150 | /** @} |
150 | /** @} |
151 | */ |
151 | */ |
152 | 152 | ||
153 | 153 |