e6942b7de2
Implement atomic logic ops -- atomic_{or,xor,and}.
These will replace the atomic_{set,clear}_mask functions that are
available on some archs.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
#ifndef __ASM_SH_ATOMIC_GRB_H
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#define __ASM_SH_ATOMIC_GRB_H
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#define ATOMIC_OP(op) \
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static inline void atomic_##op(int i, atomic_t *v) \
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{ \
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int tmp; \
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\
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__asm__ __volatile__ ( \
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" .align 2 \n\t" \
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" mova 1f, r0 \n\t" /* r0 = end point */ \
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" mov r15, r1 \n\t" /* r1 = saved sp */ \
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" mov #-6, r15 \n\t" /* LOGIN: r15 = size */ \
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" mov.l @%1, %0 \n\t" /* load old value */ \
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" " #op " %2, %0 \n\t" /* $op */ \
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" mov.l %0, @%1 \n\t" /* store new value */ \
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"1: mov r1, r15 \n\t" /* LOGOUT */ \
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: "=&r" (tmp), \
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"+r" (v) \
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: "r" (i) \
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: "memory" , "r0", "r1"); \
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} \
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#define ATOMIC_OP_RETURN(op) \
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static inline int atomic_##op##_return(int i, atomic_t *v) \
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{ \
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int tmp; \
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\
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__asm__ __volatile__ ( \
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" .align 2 \n\t" \
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" mova 1f, r0 \n\t" /* r0 = end point */ \
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" mov r15, r1 \n\t" /* r1 = saved sp */ \
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" mov #-6, r15 \n\t" /* LOGIN: r15 = size */ \
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" mov.l @%1, %0 \n\t" /* load old value */ \
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" " #op " %2, %0 \n\t" /* $op */ \
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" mov.l %0, @%1 \n\t" /* store new value */ \
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"1: mov r1, r15 \n\t" /* LOGOUT */ \
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: "=&r" (tmp), \
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"+r" (v) \
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: "r" (i) \
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: "memory" , "r0", "r1"); \
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\
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return tmp; \
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}
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#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op)
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ATOMIC_OPS(add)
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ATOMIC_OPS(sub)
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ATOMIC_OP(and)
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ATOMIC_OP(or)
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ATOMIC_OP(xor)
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#undef ATOMIC_OPS
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#undef ATOMIC_OP_RETURN
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#undef ATOMIC_OP
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#endif /* __ASM_SH_ATOMIC_GRB_H */
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