diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc32/atomic-machine.h')
| -rw-r--r-- | sysdeps/powerpc/powerpc32/atomic-machine.h | 22 |
1 files changed, 2 insertions, 20 deletions
diff --git a/sysdeps/powerpc/powerpc32/atomic-machine.h b/sysdeps/powerpc/powerpc32/atomic-machine.h index 1d407b3490..e0de9d858d 100644 --- a/sysdeps/powerpc/powerpc32/atomic-machine.h +++ b/sysdeps/powerpc/powerpc32/atomic-machine.h @@ -1,5 +1,5 @@ /* Atomic operations. PowerPC32 version. - Copyright (C) 2003-2016 Free Software Foundation, Inc. + Copyright (C) 2003-2018 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003. @@ -35,6 +35,7 @@ #define __HAVE_64B_ATOMICS 0 #define USE_ATOMIC_COMPILER_BUILTINS 0 +#define ATOMIC_EXCHANGE_USES_CAS 1 /* * The 32-bit exchange_bool is different on powerpc64 because the subf @@ -58,22 +59,6 @@ __tmp != 0; \ }) -#define __arch_compare_and_exchange_bool_32_rel(mem, newval, oldval) \ -({ \ - unsigned int __tmp; \ - __asm __volatile (__ARCH_REL_INSTR "\n" \ - "1: lwarx %0,0,%1" MUTEX_HINT_REL "\n" \ - " subf. %0,%2,%0\n" \ - " bne 2f\n" \ - " stwcx. %3,0,%1\n" \ - " bne- 1b\n" \ - "2: " \ - : "=&r" (__tmp) \ - : "b" (mem), "r" (oldval), "r" (newval) \ - : "cr0", "memory"); \ - __tmp != 0; \ -}) - /* Powerpc32 processors don't implement the 64-bit (doubleword) forms of load and reserve (ldarx) and store conditional (stdcx.) instructions. So for powerpc32 we stub out the 64-bit forms. */ @@ -83,9 +68,6 @@ #define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \ (abort (), (__typeof (*mem)) 0) -#define __arch_compare_and_exchange_bool_64_rel(mem, newval, oldval) \ - (abort (), 0) - #define __arch_compare_and_exchange_val_64_rel(mem, newval, oldval) \ (abort (), (__typeof (*mem)) 0) |