forked from Minki/linux
c6470150df
Many of the atomic op implementations are the same except for one instruction; fold the lot into a few CPP macros and reduce LoC. This also prepares for easy addition of new ops. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: linux-sh@vger.kernel.org Link: http://lkml.kernel.org/r/20140508135852.770036493@infradead.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
95 lines
2.8 KiB
C
95 lines
2.8 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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#undef ATOMIC_OPS
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#undef ATOMIC_OP_RETURN
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#undef ATOMIC_OP
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static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
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{
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int tmp;
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unsigned int _mask = ~mask;
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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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" and %2, %0 \n\t" /* add */
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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" (_mask)
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: "memory" , "r0", "r1");
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}
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static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
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{
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int tmp;
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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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" or %2, %0 \n\t" /* or */
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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" (mask)
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: "memory" , "r0", "r1");
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}
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#endif /* __ASM_SH_ATOMIC_GRB_H */
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