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#define LLSC_CLOBBERS "r0", "t", "memory"
#define LLSC_START(mem) "synco\n" \
"0: movli.l @" mem ", r0\n"
#define LLSC_END(mem) \
"1: movco.l r0, @" mem "\n" \
" bf 0b\n" \
" synco\n"
static inline int __sh_cas_llsc(volatile int *p, int t, int s)
{
int old;
__asm__ __volatile__(
LLSC_START("%1")
" mov r0, %0\n"
" cmp/eq %0, %2\n"
" bf 1f\n"
" mov %3, r0\n"
LLSC_END("%1")
: "=&r"(old) : "r"(p), "r"(t), "r"(s) : LLSC_CLOBBERS);
return old;
}
static inline int __sh_swap_llsc(volatile int *x, int v)
{
int old;
__asm__ __volatile__(
LLSC_START("%1")
" mov r0, %0\n"
" mov %2, r0\n"
LLSC_END("%1")
: "=&r"(old) : "r"(x), "r"(v) : LLSC_CLOBBERS);
return old;
}
static inline int __sh_fetch_add_llsc(volatile int *x, int v)
{
int old;
__asm__ __volatile__(
LLSC_START("%1")
" mov r0, %0\n"
" add %2, r0\n"
LLSC_END("%1")
: "=&r"(old) : "r"(x), "r"(v) : LLSC_CLOBBERS);
return old;
}
static inline void __sh_store_llsc(volatile int *p, int x)
{
__asm__ __volatile__(
" synco\n"
" mov.l %1, @%0\n"
" synco\n"
: : "r"(p), "r"(x) : "memory");
}
static inline void __sh_and_llsc(volatile int *x, int v)
{
__asm__ __volatile__(
LLSC_START("%0")
" and %1, r0\n"
LLSC_END("%0")
: : "r"(x), "r"(v) : LLSC_CLOBBERS);
}
static inline void __sh_or_llsc(volatile int *x, int v)
{
__asm__ __volatile__(
LLSC_START("%0")
" or %1, r0\n"
LLSC_END("%0")
: : "r"(x), "r"(v) : LLSC_CLOBBERS);
}
#ifdef __SH4A__
#define a_cas(p,t,s) __sh_cas_llsc(p,t,s)
#define a_swap(x,v) __sh_swap_llsc(x,v)
#define a_fetch_add(x,v) __sh_fetch_add_llsc(x, v)
#define a_store(x,v) __sh_store_llsc(x, v)
#define a_and(x,v) __sh_and_llsc(x, v)
#define a_or(x,v) __sh_or_llsc(x, v)
#else
int __sh_cas(volatile int *, int, int);
int __sh_swap(volatile int *, int);
int __sh_fetch_add(volatile int *, int);
void __sh_store(volatile int *, int);
void __sh_and(volatile int *, int);
void __sh_or(volatile int *, int);
#define a_cas(p,t,s) __sh_cas(p,t,s)
#define a_swap(x,v) __sh_swap(x,v)
#define a_fetch_add(x,v) __sh_fetch_add(x, v)
#define a_store(x,v) __sh_store(x, v)
#define a_and(x,v) __sh_and(x, v)
#define a_or(x,v) __sh_or(x, v)
#endif
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