| #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_u16(volatile u16 *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.w @%1, %0 \n\t" /* load old value */ |
| " extu.w %0, %0 \n\t" /* extend as unsigned */ |
| " mov.w %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 */ |
