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- #ifndef __ASM_SH_CMPXCHG_GRB_H
- #define __ASM_SH_CMPXCHG_GRB_H
- static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
- {
- unsigned long retval;
- __asm__ __volatile__ (
- " .align 2 \n\t"
- " mova 1f, r0 \n\t" /* r0 = end point */
- " nop \n\t"
- " mov r15, r1 \n\t" /* r1 = saved sp */
- " mov #-4, r15 \n\t" /* LOGIN */
- " mov.l @%1, %0 \n\t" /* load old value */
- " mov.l %2, @%1 \n\t" /* store new value */
- "1: mov r1, r15 \n\t" /* LOGOUT */
- : "=&r" (retval),
- "+r" (m),
- "+r" (val) /* inhibit r15 overloading */
- :
- : "memory", "r0", "r1");
- return retval;
- }
- static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)
- {
- unsigned long retval;
- __asm__ __volatile__ (
- " .align 2 \n\t"
- " mova 1f, r0 \n\t" /* r0 = end point */
- " mov r15, r1 \n\t" /* r1 = saved sp */
- " mov #-6, r15 \n\t" /* LOGIN */
- " mov.b @%1, %0 \n\t" /* load old value */
- " extu.b %0, %0 \n\t" /* extend as unsigned */
- " mov.b %2, @%1 \n\t" /* store new value */
- "1: mov r1, r15 \n\t" /* LOGOUT */
- : "=&r" (retval),
- "+r" (m),
- "+r" (val) /* inhibit r15 overloading */
- :
- : "memory" , "r0", "r1");
- return retval;
- }
- static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old,
- unsigned long new)
- {
- unsigned long retval;
- __asm__ __volatile__ (
- " .align 2 \n\t"
- " mova 1f, r0 \n\t" /* r0 = end point */
- " nop \n\t"
- " mov r15, r1 \n\t" /* r1 = saved sp */
- " mov #-8, r15 \n\t" /* LOGIN */
- " mov.l @%3, %0 \n\t" /* load old value */
- " cmp/eq %0, %1 \n\t"
- " bf 1f \n\t" /* if not equal */
- " mov.l %2, @%3 \n\t" /* store new value */
- "1: mov r1, r15 \n\t" /* LOGOUT */
- : "=&r" (retval),
- "+r" (old), "+r" (new) /* old or new can be r15 */
- : "r" (m)
- : "memory" , "r0", "r1", "t");
- return retval;
- }
- #endif /* __ASM_SH_CMPXCHG_GRB_H */
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