diff options
Diffstat (limited to 'include/private/gc_locks.h')
| -rw-r--r-- | include/private/gc_locks.h | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/include/private/gc_locks.h b/include/private/gc_locks.h index 6133343a..35c37162 100644 --- a/include/private/gc_locks.h +++ b/include/private/gc_locks.h @@ -157,7 +157,7 @@ : "=&r"(oldval), "=p"(addr) : "r"(temp), "1"(addr) : "memory"); - return (int)oldval; + return oldval; } # define GC_TEST_AND_SET_DEFINED inline static void GC_clear(volatile unsigned int *addr) { @@ -212,6 +212,19 @@ } # define GC_TEST_AND_SET_DEFINED # endif /* ARM32 */ +# ifdef S390 + inline static int GC_test_and_set(volatile unsigned int *addr) { + int ret; + __asm__ __volatile__ ( + " l %0,0(%2)\n" + "0: cs %0,%1,0(%2)\n" + " jl 0b" + : "=&d" (ret) + : "d" (1), "a" (addr) + : "cc", "memory"); + return ret; + } +# endif # endif /* __GNUC__ */ # if (defined(ALPHA) && !defined(__GNUC__)) # ifndef OSF1 @@ -385,6 +398,27 @@ # define GC_memory_barrier() asm("mb") # endif /* !__GNUC__ */ # endif /* ALPHA */ +# if defined(S390) +# if !defined(GENERIC_COMPARE_AND_SWAP) + inline static GC_bool GC_compare_and_exchange(volatile C_word *addr, + GC_word old, GC_word new_val) + { + int retval; + __asm__ __volatile__ ( +# ifndef __s390x__ + " cs %1,%2,0(%3)\n" +# else + " csg %1,%2,0(%3)\n" +# endif + " ipm %0\n" + " srl %0,28\n" + : "=&d" (retval), "+d" (old) + : "d" (new_val), "a" (addr) + : "cc", "memory"); + return retval == 0; + } +# endif +# endif # if !defined(GENERIC_COMPARE_AND_SWAP) /* Returns the original value of *addr. */ inline static GC_word GC_atomic_add(volatile GC_word *addr, |