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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 | #ifndef __amd64_MEMSTR_H__ |
29 | #ifndef __amd64_MEMSTR_H__ |
30 | #define __amd64_MEMSTR_H__ |
30 | #define __amd64_MEMSTR_H__ |
31 | 31 | ||
32 | /** Copy memory |
32 | /** Copy memory |
33 | * |
33 | * |
34 | * Copy a given number of bytes (3rd argument) |
34 | * Copy a given number of bytes (3rd argument) |
35 | * from the memory location defined by 2nd argument |
35 | * from the memory location defined by 2nd argument |
36 | * to the memory location defined by 1st argument. |
36 | * to the memory location defined by 1st argument. |
37 | * The memory areas cannot overlap. |
37 | * The memory areas cannot overlap. |
38 | * |
38 | * |
39 | * @param dst Destination |
39 | * @param dst Destination |
40 | * @param src Source |
40 | * @param src Source |
41 | * @param cnt Number of bytes |
41 | * @param cnt Number of bytes |
42 | * @return Destination |
42 | * @return Destination |
43 | */ |
43 | */ |
44 | static inline void * memcpy(void * dst, const void * src, size_t cnt) |
44 | static inline void * memcpy(void * dst, const void * src, size_t cnt) |
45 | { |
45 | { |
46 | __native d0, d1, d2; |
46 | __native d0, d1, d2; |
47 | 47 | ||
48 | __asm__ __volatile__( |
48 | __asm__ __volatile__( |
49 | "rep movsq\n\t" |
49 | "rep movsq\n\t" |
50 | "movq %4, %%rcx\n\t" |
50 | "movq %4, %%rcx\n\t" |
51 | "andq $7, %%rcx\n\t" |
51 | "andq $7, %%rcx\n\t" |
52 | "jz 1f\n\t" |
52 | "jz 1f\n\t" |
53 | "rep movsb\n\t" |
53 | "rep movsb\n\t" |
54 | "1:\n" |
54 | "1:\n" |
55 | : "=&c" (d0), "=&D" (d1), "=&S" (d2) |
55 | : "=&c" (d0), "=&D" (d1), "=&S" (d2) |
56 | : "0" ((__native)(cnt / 8)), "g" ((__native)cnt), "1" ((__native) dst), "2" ((__native) src) |
56 | : "0" ((__native)(cnt / 8)), "g" ((__native)cnt), "1" ((__native) dst), "2" ((__native) src) |
57 | : "memory"); |
57 | : "memory"); |
58 | 58 | ||
59 | return dst; |
59 | return dst; |
60 | } |
60 | } |
61 | 61 | ||
62 | 62 | ||
63 | /** Compare memory regions for equality |
63 | /** Compare memory regions for equality |
64 | * |
64 | * |
65 | * Compare a given number of bytes (3rd argument) |
65 | * Compare a given number of bytes (3rd argument) |
66 | * at memory locations defined by 1st and 2nd argument |
66 | * at memory locations defined by 1st and 2nd argument |
67 | * for equality. If bytes are equal function returns 0. |
67 | * for equality. If bytes are equal function returns 0. |
68 | * |
68 | * |
69 | * @param src Region 1 |
69 | * @param src Region 1 |
70 | * @param dst Region 2 |
70 | * @param dst Region 2 |
71 | * @param cnt Number of bytes |
71 | * @param cnt Number of bytes |
72 | * @return Zero if bytes are equal, non-zero otherwise |
72 | * @return Zero if bytes are equal, non-zero otherwise |
73 | */ |
73 | */ |
74 | static inline int memcmp(const void * src, const void * dst, size_t cnt) |
74 | static inline int memcmp(const void * src, const void * dst, size_t cnt) |
75 | { |
75 | { |
76 | __native d0, d1, d2; |
76 | __native d0, d1, d2; |
77 | __native ret; |
77 | __native ret; |
78 | 78 | ||
79 | __asm__ ( |
79 | __asm__ ( |
80 | "repe cmpsb\n\t" |
80 | "repe cmpsb\n\t" |
81 | "je 1f\n\t" |
81 | "je 1f\n\t" |
82 | "movq %3, %0\n\t" |
82 | "movq %3, %0\n\t" |
83 | "addq $1, %0\n\t" |
83 | "addq $1, %0\n\t" |
84 | "1:\n" |
84 | "1:\n" |
85 | : "=a" (ret), "=%S" (d0), "=&D" (d1), "=&c" (d2) |
85 | : "=a" (ret), "=%S" (d0), "=&D" (d1), "=&c" (d2) |
86 | : "0" (0), "1" (src), "2" (dst), "3" ((__native)cnt) |
86 | : "0" (0), "1" (src), "2" (dst), "3" ((__native)cnt) |
87 | ); |
87 | ); |
88 | 88 | ||
89 | return ret; |
89 | return ret; |
90 | } |
90 | } |
91 | 91 | ||
92 | /** Fill memory with words |
92 | /** Fill memory with words |
93 | * Fill a given number of words (2nd argument) |
93 | * Fill a given number of words (2nd argument) |
94 | * at memory defined by 1st argument with the |
94 | * at memory defined by 1st argument with the |
95 | * word value defined by 3rd argument. |
95 | * word value defined by 3rd argument. |
96 | * |
96 | * |
97 | * @param dst Destination |
97 | * @param dst Destination |
98 | * @param cnt Number of words |
98 | * @param cnt Number of words |
99 | * @param x Value to fill |
99 | * @param x Value to fill |
100 | */ |
100 | */ |
101 | static inline void memsetw(__address dst, size_t cnt, __u16 x) |
101 | static inline void memsetw(__address dst, size_t cnt, __u16 x) |
102 | { |
102 | { |
103 | __native d0, d1; |
103 | __native d0, d1; |
104 | 104 | ||
105 | __asm__ __volatile__ ( |
105 | __asm__ __volatile__ ( |
106 | "rep stosw\n\t" |
106 | "rep stosw\n\t" |
107 | : "=&D" (d0), "=&c" (d1), "=a" (x) |
107 | : "=&D" (d0), "=&c" (d1), "=a" (x) |
108 | : "0" (dst), "1" ((__native)cnt), "2" (x) |
108 | : "0" (dst), "1" ((__native)cnt), "2" (x) |
109 | : "memory" |
109 | : "memory" |
110 | ); |
110 | ); |
111 | 111 | ||
112 | } |
112 | } |
113 | 113 | ||
114 | /** Fill memory with bytes |
114 | /** Fill memory with bytes |
115 | * Fill a given number of bytes (2nd argument) |
115 | * Fill a given number of bytes (2nd argument) |
116 | * at memory defined by 1st argument with the |
116 | * at memory defined by 1st argument with the |
117 | * word value defined by 3rd argument. |
117 | * word value defined by 3rd argument. |
118 | * |
118 | * |
119 | * @param dst Destination |
119 | * @param dst Destination |
120 | * @param cnt Number of bytes |
120 | * @param cnt Number of bytes |
121 | * @param x Value to fill |
121 | * @param x Value to fill |
122 | */ |
122 | */ |
123 | static inline void memsetb(__address dst, size_t cnt, __u8 x) |
123 | static inline void memsetb(__address dst, size_t cnt, __u8 x) |
124 | { |
124 | { |
125 | __native d0, d1; |
125 | __native d0, d1; |
126 | 126 | ||
127 | __asm__ __volatile__ ( |
127 | __asm__ __volatile__ ( |
128 | "rep stosb\n\t" |
128 | "rep stosb\n\t" |
129 | : "=&D" (d0), "=&c" (d1), "=a" (x) |
129 | : "=&D" (d0), "=&c" (d1), "=a" (x) |
130 | : "0" (dst), "1" ((__native)cnt), "2" (x) |
130 | : "0" (dst), "1" ((__native)cnt), "2" (x) |
131 | : "memory" |
131 | : "memory" |
132 | ); |
132 | ); |
133 | 133 | ||
134 | } |
134 | } |
135 | 135 | ||
136 | #endif |
136 | #endif |
137 | 137 |