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- #ifndef _PT_MACHINE_H
- #define _PT_MACHINE_H 1
- #include <features.h>
- #include <sgidefs.h>
- #include <sys/tas.h>
- #ifndef PT_EI
- # define PT_EI __extern_always_inline
- #endif
- PT_EI long int
- testandset (int *spinlock)
- {
- return _test_and_set (spinlock, 1);
- }
- #define CURRENT_STACK_FRAME stack_pointer
- register char * stack_pointer __asm__ ("$29");
- #define HAS_COMPARE_AND_SWAP
- PT_EI int
- __compare_and_swap (long int *p, long int oldval, long int newval)
- {
- long int ret, temp;
- __asm__ __volatile__
- ("/* Inline compare & swap */\n"
- "1:\n\t"
- ".set push\n\t"
- #if _MIPS_SIM == _ABIO32
- ".set mips2\n\t"
- #endif
- #if _MIPS_SIM == _ABI64
- "lld %1,%5\n\t"
- #else
- "ll %1,%5\n\t"
- #endif
- "move %0,$0\n\t"
- "bne %1,%3,2f\n\t"
- "move %0,%4\n\t"
- #if _MIPS_SIM == _ABI64
- "scd %0,%2\n\t"
- #else
- "sc %0,%2\n\t"
- #endif
- ".set pop\n\t"
- "beqz %0,1b\n"
- "2:\n\t"
- "/* End compare & swap */"
- : "=&r" (ret), "=&r" (temp), "=m" (*p)
- : "r" (oldval), "r" (newval), "m" (*p)
- : "memory");
- return ret;
- }
- #endif
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