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cmpxchg-grb.h
/* SPDX-License-Identifier: GPL-2.0 */ #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 */
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