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#define a_cas a_cas
static inline int a_cas(volatile int *p, int t, int s)
{
register int old, tmp;
__asm__ __volatile__ (
" addi %0, r0, 0\n"
"1: lwx %0, %2, r0\n"
" rsubk %1, %0, %3\n"
" bnei %1, 1f\n"
" swx %4, %2, r0\n"
" addic %1, r0, 0\n"
" bnei %1, 1b\n"
"1: "
: "=&r"(old), "=&r"(tmp)
: "r"(p), "r"(t), "r"(s)
: "cc", "memory" );
return old;
}
#define a_swap a_swap
static inline int a_swap(volatile int *x, int v)
{
register int old, tmp;
__asm__ __volatile__ (
" addi %0, r0, 0\n"
"1: lwx %0, %2, r0\n"
" swx %3, %2, r0\n"
" addic %1, r0, 0\n"
" bnei %1, 1b\n"
"1: "
: "=&r"(old), "=&r"(tmp)
: "r"(x), "r"(v)
: "cc", "memory" );
return old;
}
#define a_fetch_add a_fetch_add
static inline int a_fetch_add(volatile int *x, int v)
{
register int new, tmp;
__asm__ __volatile__ (
" addi %0, r0, 0\n"
"1: lwx %0, %2, r0\n"
" addk %0, %0, %3\n"
" swx %0, %2, r0\n"
" addic %1, r0, 0\n"
" bnei %1, 1b\n"
"1: "
: "=&r"(new), "=&r"(tmp)
: "r"(x), "r"(v)
: "cc", "memory" );
return new-v;
}
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