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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [include/] [asm-sh64/] [bitops.h] - Blame information for rev 1774

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#ifndef __ASM_SH64_BITOPS_H
#define __ASM_SH64_BITOPS_H
 
#ifdef __KERNEL__
#include <asm/system.h>
/* For __swab32 */
#include <asm/byteorder.h>
 
static __inline__ void set_bit(int nr, volatile void * addr)
{
        int     mask;
        volatile unsigned int *a = addr;
        unsigned long flags;
 
        a += nr >> 5;
        mask = 1 << (nr & 0x1f);
        save_and_cli(flags);
        *a |= mask;
        restore_flags(flags);
}
 
static __inline__ void __set_bit(int nr, volatile void * addr)
{
        int     mask;
        volatile unsigned int *a = addr;
 
        a += nr >> 5;
        mask = 1 << (nr & 0x1f);
        *a |= mask;
}
 
/*
 * clear_bit() doesn't provide any barrier for the compiler.
 */
#define smp_mb__before_clear_bit()      barrier()
#define smp_mb__after_clear_bit()       barrier()
static __inline__ void clear_bit(int nr, volatile void * addr)
{
        int     mask;
        volatile unsigned int *a = addr;
        unsigned long flags;
 
        a += nr >> 5;
        mask = 1 << (nr & 0x1f);
        save_and_cli(flags);
        *a &= ~mask;
        restore_flags(flags);
}
 
static __inline__ void __clear_bit(int nr, volatile void * addr)
{
        int     mask;
        volatile unsigned int *a = addr;
 
        a += nr >> 5;
        mask = 1 << (nr & 0x1f);
        *a &= ~mask;
}
 
static __inline__ void change_bit(int nr, volatile void * addr)
{
        int     mask;
        volatile unsigned int *a = addr;
        unsigned long flags;
 
        a += nr >> 5;
        mask = 1 << (nr & 0x1f);
        save_and_cli(flags);
        *a ^= mask;
        restore_flags(flags);
}
 
static __inline__ void __change_bit(int nr, volatile void * addr)
{
        int     mask;
        volatile unsigned int *a = addr;
 
        a += nr >> 5;
        mask = 1 << (nr & 0x1f);
        *a ^= mask;
}
 
static __inline__ int test_and_set_bit(int nr, volatile void * addr)
{
        int     mask, retval;
        volatile unsigned int *a = addr;
        unsigned long flags;
 
        a += nr >> 5;
        mask = 1 << (nr & 0x1f);
        save_and_cli(flags);
        retval = (mask & *a) != 0;
        *a |= mask;
        restore_flags(flags);
 
        return retval;
}
 
static __inline__ int __test_and_set_bit(int nr, volatile void * addr)
{
        int     mask, retval;
        volatile unsigned int *a = addr;
 
        a += nr >> 5;
        mask = 1 << (nr & 0x1f);
        retval = (mask & *a) != 0;
        *a |= mask;
 
        return retval;
}
 
static __inline__ int test_and_clear_bit(int nr, volatile void * addr)
{
        int     mask, retval;
        volatile unsigned int *a = addr;
        unsigned long flags;
 
        a += nr >> 5;
        mask = 1 << (nr & 0x1f);
        save_and_cli(flags);
        retval = (mask & *a) != 0;
        *a &= ~mask;
        restore_flags(flags);
 
        return retval;
}
 
static __inline__ int __test_and_clear_bit(int nr, volatile void * addr)
{
        int     mask, retval;
        volatile unsigned int *a = addr;
 
        a += nr >> 5;
        mask = 1 << (nr & 0x1f);
        retval = (mask & *a) != 0;
        *a &= ~mask;
 
        return retval;
}
 
static __inline__ int test_and_change_bit(int nr, volatile void * addr)
{
        int     mask, retval;
        volatile unsigned int *a = addr;
        unsigned long flags;
 
        a += nr >> 5;
        mask = 1 << (nr & 0x1f);
        save_and_cli(flags);
        retval = (mask & *a) != 0;
        *a ^= mask;
        restore_flags(flags);
 
        return retval;
}
 
static __inline__ int __test_and_change_bit(int nr, volatile void * addr)
{
        int     mask, retval;
        volatile unsigned int *a = addr;
 
        a += nr >> 5;
        mask = 1 << (nr & 0x1f);
        retval = (mask & *a) != 0;
        *a ^= mask;
 
        return retval;
}
 
static __inline__ int test_bit(int nr, const volatile void *addr)
{
        return 1UL & (((const volatile unsigned int *) addr)[nr >> 5] >> (nr & 31));
}
 
static __inline__ unsigned long ffz(unsigned long word)
{
        unsigned long result, __d2, __d3;
 
        __asm__("gettr  " __t0 ", %2\n\t"
                "_pta   32, " __t0 "\n\t"
                "andi   %1, 1, %3\n\t"
                "beq    %3, r63, " __t0 "\n\t"
                "_pta   4, " __t0 "\n"
                "0:\n\t"
                "shlri.l        %1, 1, %1\n\t"
                "addi   %0, 1, %0\n\t"
                "andi   %1, 1, %3\n\t"
                "beqi   %3, 1, " __t0 "\n"
                "1:\n\t"
                "ptabs  %2, " __t0 "\n\t"
                : "=r" (result), "=r" (word), "=r" (__d2), "=r" (__d3)
                : "0" (0L), "1" (word));
 
        return result;
}
 
static __inline__ int find_next_zero_bit(void *addr, int size, int offset)
{
        unsigned long *p = ((unsigned long *) addr) + (offset >> 5);
        unsigned long result = offset & ~31UL;
        unsigned long tmp;
 
        if (offset >= size)
                return size;
        size -= result;
        offset &= 31UL;
        if (offset) {
                tmp = *(p++);
                tmp |= ~0UL >> (32-offset);
                if (size < 32)
                        goto found_first;
                if (~tmp)
                        goto found_middle;
                size -= 32;
                result += 32;
        }
        while (size & ~31UL) {
                if (~(tmp = *(p++)))
                        goto found_middle;
                result += 32;
                size -= 32;
        }
        if (!size)
                return result;
        tmp = *p;
 
found_first:
        tmp |= ~0UL << size;
found_middle:
        return result + ffz(tmp);
}
 
#define find_first_zero_bit(addr, size) \
        find_next_zero_bit((addr), (size), 0)
 
/*
 * ffs: find first bit set. This is defined the same way as
 * the libc and compiler builtin ffs routines, therefore
 * differs in spirit from the above ffz (man ffs).
 */
 
#define ffs(x) generic_ffs(x)
 
/*
 * hweightN: returns the hamming weight (i.e. the number
 * of bits set) of a N-bit word
 */
 
#define hweight32(x) generic_hweight32(x)
#define hweight16(x) generic_hweight16(x)
#define hweight8(x) generic_hweight8(x)
 
#ifdef __LITTLE_ENDIAN__
#define ext2_set_bit(nr, addr) test_and_set_bit((nr), (addr))
#define ext2_clear_bit(nr, addr) test_and_clear_bit((nr), (addr))
#define ext2_test_bit(nr, addr) test_bit((nr), (addr))
#define ext2_find_first_zero_bit(addr, size) find_first_zero_bit((addr), (size))
#define ext2_find_next_zero_bit(addr, size, offset) \
                find_next_zero_bit((addr), (size), (offset))
#else
static __inline__ int ext2_set_bit(int nr, volatile void * addr)
{
        int             mask, retval;
        unsigned long   flags;
        volatile unsigned char  *ADDR = (unsigned char *) addr;
 
        ADDR += nr >> 3;
        mask = 1 << (nr & 0x07);
        save_and_cli(flags);
        retval = (mask & *ADDR) != 0;
        *ADDR |= mask;
        restore_flags(flags);
        return retval;
}
 
static __inline__ int ext2_clear_bit(int nr, volatile void * addr)
{
        int             mask, retval;
        unsigned long   flags;
        volatile unsigned char  *ADDR = (unsigned char *) addr;
 
        ADDR += nr >> 3;
        mask = 1 << (nr & 0x07);
        save_and_cli(flags);
        retval = (mask & *ADDR) != 0;
        *ADDR &= ~mask;
        restore_flags(flags);
        return retval;
}
 
static __inline__ int ext2_test_bit(int nr, const volatile void * addr)
{
        int                     mask;
        const volatile unsigned char    *ADDR = (const unsigned char *) addr;
 
        ADDR += nr >> 3;
        mask = 1 << (nr & 0x07);
        return ((mask & *ADDR) != 0);
}
 
#define ext2_find_first_zero_bit(addr, size) \
        ext2_find_next_zero_bit((addr), (size), 0)
 
static __inline__ unsigned long ext2_find_next_zero_bit(void *addr, unsigned long size, unsigned long offset)
{
        unsigned long *p = ((unsigned long *) addr) + (offset >> 5);
        unsigned long result = offset & ~31UL;
        unsigned long tmp;
 
        if (offset >= size)
                return size;
        size -= result;
        offset &= 31UL;
        if(offset) {
                /* We hold the little endian value in tmp, but then the
                 * shift is illegal. So we could keep a big endian value
                 * in tmp, like this:
                 *
                 * tmp = __swab32(*(p++));
                 * tmp |= ~0UL >> (32-offset);
                 *
                 * but this would decrease preformance, so we change the
                 * shift:
                 */
                tmp = *(p++);
                tmp |= __swab32(~0UL >> (32-offset));
                if(size < 32)
                        goto found_first;
                if(~tmp)
                        goto found_middle;
                size -= 32;
                result += 32;
        }
        while(size & ~31UL) {
                if(~(tmp = *(p++)))
                        goto found_middle;
                result += 32;
                size -= 32;
        }
        if(!size)
                return result;
        tmp = *p;
 
found_first:
        /* tmp is little endian, so we would have to swab the shift,
         * see above. But then we have to swab tmp below for ffz, so
         * we might as well do this here.
         */
        return result + ffz(__swab32(tmp) | (~0UL << size));
found_middle:
        return result + ffz(__swab32(tmp));
}
#endif
 
/* Bitmap functions for the minix filesystem.  */
#define minix_test_and_set_bit(nr,addr) test_and_set_bit(nr,addr)
#define minix_set_bit(nr,addr) set_bit(nr,addr)
#define minix_test_and_clear_bit(nr,addr) test_and_clear_bit(nr,addr)
#define minix_test_bit(nr,addr) test_bit(nr,addr)
#define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size)
 
#endif /* __KERNEL__ */
 
#endif /* __ASM_SH64_BITOPS_H */

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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [include/] [asm-sh64/] [bitops.h] - Blame information for rev 1774

Line No.	Rev	Author	Line
1	1276	phoenix	`#ifndef __ASM_SH64_BITOPS_H`
2			`#define __ASM_SH64_BITOPS_H`
3
4			`#ifdef __KERNEL__`
5			`#include <asm/system.h>`
6			`/* For __swab32 */`
7			`#include <asm/byteorder.h>`
8
9			`static __inline__ void set_bit(int nr, volatile void * addr)`
10			`{`
11			`int mask;`
12			`volatile unsigned int *a = addr;`
13			`unsigned long flags;`
14
15			`a += nr >> 5;`
16			`mask = 1 << (nr & 0x1f);`
17			`save_and_cli(flags);`
18			`*a \|= mask;`
19			`restore_flags(flags);`
20			`}`
21
22			`static __inline__ void __set_bit(int nr, volatile void * addr)`
23			`{`
24			`int mask;`
25			`volatile unsigned int *a = addr;`
26
27			`a += nr >> 5;`
28			`mask = 1 << (nr & 0x1f);`
29			`*a \|= mask;`
30			`}`
31
32			`/*`
33			`* clear_bit() doesn't provide any barrier for the compiler.`
34			`*/`
35			`#define smp_mb__before_clear_bit() barrier()`
36			`#define smp_mb__after_clear_bit() barrier()`
37			`static __inline__ void clear_bit(int nr, volatile void * addr)`
38			`{`
39			`int mask;`
40			`volatile unsigned int *a = addr;`
41			`unsigned long flags;`
42
43			`a += nr >> 5;`
44			`mask = 1 << (nr & 0x1f);`
45			`save_and_cli(flags);`
46			`*a &= ~mask;`
47			`restore_flags(flags);`
48			`}`
49
50			`static __inline__ void __clear_bit(int nr, volatile void * addr)`
51			`{`
52			`int mask;`
53			`volatile unsigned int *a = addr;`
54
55			`a += nr >> 5;`
56			`mask = 1 << (nr & 0x1f);`
57			`*a &= ~mask;`
58			`}`
59
60			`static __inline__ void change_bit(int nr, volatile void * addr)`
61			`{`
62			`int mask;`
63			`volatile unsigned int *a = addr;`
64			`unsigned long flags;`
65
66			`a += nr >> 5;`
67			`mask = 1 << (nr & 0x1f);`
68			`save_and_cli(flags);`
69			`*a ^= mask;`
70			`restore_flags(flags);`
71			`}`
72
73			`static __inline__ void __change_bit(int nr, volatile void * addr)`
74			`{`
75			`int mask;`
76			`volatile unsigned int *a = addr;`
77
78			`a += nr >> 5;`
79			`mask = 1 << (nr & 0x1f);`
80			`*a ^= mask;`
81			`}`
82
83			`static __inline__ int test_and_set_bit(int nr, volatile void * addr)`
84			`{`
85			`int mask, retval;`
86			`volatile unsigned int *a = addr;`
87			`unsigned long flags;`
88
89			`a += nr >> 5;`
90			`mask = 1 << (nr & 0x1f);`
91			`save_and_cli(flags);`
92			`retval = (mask & *a) != 0;`
93			`*a \|= mask;`
94			`restore_flags(flags);`
95
96			`return retval;`
97			`}`
98
99			`static __inline__ int __test_and_set_bit(int nr, volatile void * addr)`
100			`{`
101			`int mask, retval;`
102			`volatile unsigned int *a = addr;`
103
104			`a += nr >> 5;`
105			`mask = 1 << (nr & 0x1f);`
106			`retval = (mask & *a) != 0;`
107			`*a \|= mask;`
108
109			`return retval;`
110			`}`
111
112			`static __inline__ int test_and_clear_bit(int nr, volatile void * addr)`
113			`{`
114			`int mask, retval;`
115			`volatile unsigned int *a = addr;`
116			`unsigned long flags;`
117
118			`a += nr >> 5;`
119			`mask = 1 << (nr & 0x1f);`
120			`save_and_cli(flags);`
121			`retval = (mask & *a) != 0;`
122			`*a &= ~mask;`
123			`restore_flags(flags);`
124
125			`return retval;`
126			`}`
127
128			`static __inline__ int __test_and_clear_bit(int nr, volatile void * addr)`
129			`{`
130			`int mask, retval;`
131			`volatile unsigned int *a = addr;`
132
133			`a += nr >> 5;`
134			`mask = 1 << (nr & 0x1f);`
135			`retval = (mask & *a) != 0;`
136			`*a &= ~mask;`
137
138			`return retval;`
139			`}`
140
141			`static __inline__ int test_and_change_bit(int nr, volatile void * addr)`
142			`{`
143			`int mask, retval;`
144			`volatile unsigned int *a = addr;`
145			`unsigned long flags;`
146
147			`a += nr >> 5;`
148			`mask = 1 << (nr & 0x1f);`
149			`save_and_cli(flags);`
150			`retval = (mask & *a) != 0;`
151			`*a ^= mask;`
152			`restore_flags(flags);`
153
154			`return retval;`
155			`}`
156
157			`static __inline__ int __test_and_change_bit(int nr, volatile void * addr)`
158			`{`
159			`int mask, retval;`
160			`volatile unsigned int *a = addr;`
161
162			`a += nr >> 5;`
163			`mask = 1 << (nr & 0x1f);`
164			`retval = (mask & *a) != 0;`
165			`*a ^= mask;`
166
167			`return retval;`
168			`}`
169
170			`static __inline__ int test_bit(int nr, const volatile void *addr)`
171			`{`
172			`return 1UL & (((const volatile unsigned int *) addr)[nr >> 5] >> (nr & 31));`
173			`}`
174
175			`static __inline__ unsigned long ffz(unsigned long word)`
176			`{`
177			`unsigned long result, __d2, __d3;`
178
179			`__asm__("gettr " __t0 ", %2\n\t"`
180			`"_pta 32, " __t0 "\n\t"`
181			`"andi %1, 1, %3\n\t"`
182			`"beq %3, r63, " __t0 "\n\t"`
183			`"_pta 4, " __t0 "\n"`
184			`"0:\n\t"`
185			`"shlri.l %1, 1, %1\n\t"`
186			`"addi %0, 1, %0\n\t"`
187			`"andi %1, 1, %3\n\t"`
188			`"beqi %3, 1, " __t0 "\n"`
189			`"1:\n\t"`
190			`"ptabs %2, " __t0 "\n\t"`
191			`: "=r" (result), "=r" (word), "=r" (__d2), "=r" (__d3)`
192			`: "0" (0L), "1" (word));`
193
194			`return result;`
195			`}`
196
197			`static __inline__ int find_next_zero_bit(void *addr, int size, int offset)`
198			`{`
199			`unsigned long p = ((unsigned long ) addr) + (offset >> 5);`
200			`unsigned long result = offset & ~31UL;`
201			`unsigned long tmp;`
202
203			`if (offset >= size)`
204			`return size;`
205			`size -= result;`
206			`offset &= 31UL;`
207			`if (offset) {`
208			`tmp = *(p++);`
209			`tmp \|= ~0UL >> (32-offset);`
210			`if (size < 32)`
211			`goto found_first;`
212			`if (~tmp)`
213			`goto found_middle;`
214			`size -= 32;`
215			`result += 32;`
216			`}`
217			`while (size & ~31UL) {`
218			`if (~(tmp = *(p++)))`
219			`goto found_middle;`
220			`result += 32;`
221			`size -= 32;`
222			`}`
223			`if (!size)`
224			`return result;`
225			`tmp = *p;`
226
227			`found_first:`
228			`tmp \|= ~0UL << size;`
229			`found_middle:`
230			`return result + ffz(tmp);`
231			`}`
232
233			`#define find_first_zero_bit(addr, size) \`
234			`find_next_zero_bit((addr), (size), 0)`
235
236			`/*`
237			`* ffs: find first bit set. This is defined the same way as`
238			`* the libc and compiler builtin ffs routines, therefore`
239			`* differs in spirit from the above ffz (man ffs).`
240			`*/`
241
242			`#define ffs(x) generic_ffs(x)`
243
244			`/*`
245			`* hweightN: returns the hamming weight (i.e. the number`
246			`* of bits set) of a N-bit word`
247			`*/`
248
249			`#define hweight32(x) generic_hweight32(x)`
250			`#define hweight16(x) generic_hweight16(x)`
251			`#define hweight8(x) generic_hweight8(x)`
252
253			`#ifdef __LITTLE_ENDIAN__`
254			`#define ext2_set_bit(nr, addr) test_and_set_bit((nr), (addr))`
255			`#define ext2_clear_bit(nr, addr) test_and_clear_bit((nr), (addr))`
256			`#define ext2_test_bit(nr, addr) test_bit((nr), (addr))`
257			`#define ext2_find_first_zero_bit(addr, size) find_first_zero_bit((addr), (size))`
258			`#define ext2_find_next_zero_bit(addr, size, offset) \`
259			`find_next_zero_bit((addr), (size), (offset))`
260			`#else`
261			`static __inline__ int ext2_set_bit(int nr, volatile void * addr)`
262			`{`
263			`int mask, retval;`
264			`unsigned long flags;`
265			`volatile unsigned char ADDR = (unsigned char ) addr;`
266
267			`ADDR += nr >> 3;`
268			`mask = 1 << (nr & 0x07);`
269			`save_and_cli(flags);`
270			`retval = (mask & *ADDR) != 0;`
271			`*ADDR \|= mask;`
272			`restore_flags(flags);`
273			`return retval;`
274			`}`
275
276			`static __inline__ int ext2_clear_bit(int nr, volatile void * addr)`
277			`{`
278			`int mask, retval;`
279			`unsigned long flags;`
280			`volatile unsigned char ADDR = (unsigned char ) addr;`
281
282			`ADDR += nr >> 3;`
283			`mask = 1 << (nr & 0x07);`
284			`save_and_cli(flags);`
285			`retval = (mask & *ADDR) != 0;`
286			`*ADDR &= ~mask;`
287			`restore_flags(flags);`
288			`return retval;`
289			`}`
290
291			`static __inline__ int ext2_test_bit(int nr, const volatile void * addr)`
292			`{`
293			`int mask;`
294			`const volatile unsigned char ADDR = (const unsigned char ) addr;`
295
296			`ADDR += nr >> 3;`
297			`mask = 1 << (nr & 0x07);`
298			`return ((mask & *ADDR) != 0);`
299			`}`
300
301			`#define ext2_find_first_zero_bit(addr, size) \`
302			`ext2_find_next_zero_bit((addr), (size), 0)`
303
304			`static __inline__ unsigned long ext2_find_next_zero_bit(void *addr, unsigned long size, unsigned long offset)`
305			`{`
306			`unsigned long p = ((unsigned long ) addr) + (offset >> 5);`
307			`unsigned long result = offset & ~31UL;`
308			`unsigned long tmp;`
309
310			`if (offset >= size)`
311			`return size;`
312			`size -= result;`
313			`offset &= 31UL;`
314			`if(offset) {`
315			`/* We hold the little endian value in tmp, but then the`
316			`* shift is illegal. So we could keep a big endian value`
317			`* in tmp, like this:`
318			`*`
319			`* tmp = __swab32(*(p++));`
320			`* tmp \|= ~0UL >> (32-offset);`
321			`*`
322			`* but this would decrease preformance, so we change the`
323			`* shift:`
324			`*/`
325			`tmp = *(p++);`
326			`tmp \|= __swab32(~0UL >> (32-offset));`
327			`if(size < 32)`
328			`goto found_first;`
329			`if(~tmp)`
330			`goto found_middle;`
331			`size -= 32;`
332			`result += 32;`
333			`}`
334			`while(size & ~31UL) {`
335			`if(~(tmp = *(p++)))`
336			`goto found_middle;`
337			`result += 32;`
338			`size -= 32;`
339			`}`
340			`if(!size)`
341			`return result;`
342			`tmp = *p;`
343
344			`found_first:`
345			`/* tmp is little endian, so we would have to swab the shift,`
346			`* see above. But then we have to swab tmp below for ffz, so`
347			`* we might as well do this here.`
348			`*/`
349			`return result + ffz(__swab32(tmp) \| (~0UL << size));`
350			`found_middle:`
351			`return result + ffz(__swab32(tmp));`
352			`}`
353			`#endif`
354
355			`/* Bitmap functions for the minix filesystem. */`
356			`#define minix_test_and_set_bit(nr,addr) test_and_set_bit(nr,addr)`
357			`#define minix_set_bit(nr,addr) set_bit(nr,addr)`
358			`#define minix_test_and_clear_bit(nr,addr) test_and_clear_bit(nr,addr)`
359			`#define minix_test_bit(nr,addr) test_bit(nr,addr)`
360			`#define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size)`
361
362			`#endif /* __KERNEL__ */`
363
364			`#endif /* __ASM_SH64_BITOPS_H */`