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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SH_BITOPS_CAS_H
#define __ASM_SH_BITOPS_CAS_H
static inline unsigned __bo_cas(volatile unsigned *p, unsigned old, unsigned new)
{
__asm__ __volatile__("cas.l %1,%0,@r0"
: "+r"(new)
: "r"(old), "z"(p)
: "t", "memory" );
return new;
}
static inline void set_bit(int nr, volatile void *addr)
{
unsigned mask, old;
volatile unsigned *a = addr;
a += nr >> 5;
mask = 1U << (nr & 0x1f);
do old = *a;
while (__bo_cas(a, old, old|mask) != old);
}
static inline void clear_bit(int nr, volatile void *addr)
{
unsigned mask, old;
volatile unsigned *a = addr;
a += nr >> 5;
mask = 1U << (nr & 0x1f);
do old = *a;
while (__bo_cas(a, old, old&~mask) != old);
}
static inline void change_bit(int nr, volatile void *addr)
{
unsigned mask, old;
volatile unsigned *a = addr;
a += nr >> 5;
mask = 1U << (nr & 0x1f);
do old = *a;
while (__bo_cas(a, old, old^mask) != old);
}
static inline int test_and_set_bit(int nr, volatile void *addr)
{
unsigned mask, old;
volatile unsigned *a = addr;
a += nr >> 5;
mask = 1U << (nr & 0x1f);
do old = *a;
while (__bo_cas(a, old, old|mask) != old);
return !!(old & mask);
}
static inline int test_and_clear_bit(int nr, volatile void *addr)
{
unsigned mask, old;
volatile unsigned *a = addr;
a += nr >> 5;
mask = 1U << (nr & 0x1f);
do old = *a;
while (__bo_cas(a, old, old&~mask) != old);
return !!(old & mask);
}
static inline int test_and_change_bit(int nr, volatile void *addr)
{
unsigned mask, old;
volatile unsigned *a = addr;
a += nr >> 5;
mask = 1U << (nr & 0x1f);
do old = *a;
while (__bo_cas(a, old, old^mask) != old);
return !!(old & mask);
}
#include <asm-generic/bitops/non-atomic.h>
#endif /* __ASM_SH_BITOPS_CAS_H */