diff options
Diffstat (limited to 'sysdeps/powerpc/bits/atomic.h')
| -rw-r--r-- | sysdeps/powerpc/bits/atomic.h | 85 |
1 files changed, 71 insertions, 14 deletions
diff --git a/sysdeps/powerpc/bits/atomic.h b/sysdeps/powerpc/bits/atomic.h index ebac76ab3b..5deb797256 100644 --- a/sysdeps/powerpc/bits/atomic.h +++ b/sysdeps/powerpc/bits/atomic.h @@ -53,24 +53,44 @@ typedef uintmax_t uatomic_max_t; #define __arch_compare_and_exchange_bool_16_acq(mem, newval, oldval) \ (abort (), 0) + +#define __arch_compare_and_exchange_bool_8_rel(mem, newval, oldval) \ + (abort (), 0) + +#define __arch_compare_and_exchange_bool_16_rel(mem, newval, oldval) \ + (abort (), 0) #ifdef UP # define __ARCH_ACQ_INSTR "" # define __ARCH_REL_INSTR "" #else # define __ARCH_ACQ_INSTR "isync" -# define __ARCH_REL_INSTR "sync" +# ifndef __ARCH_REL_INSTR +# define __ARCH_REL_INSTR "sync" +# endif #endif #define atomic_full_barrier() __asm ("sync" ::: "memory") #define atomic_write_barrier() __asm ("eieio" ::: "memory") -/* - * XXX At present these have both acquire and release semantics. - * Ultimately we should do separate _acq and _rel versions. - */ +#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \ + ({ \ + __typeof (*(mem)) __tmp; \ + __typeof (mem) __memp = (mem); \ + __asm __volatile ( \ + "1: lwarx %0,0,%1\n" \ + " cmpw %0,%2\n" \ + " bne 2f\n" \ + " stwcx. %3,0,%1\n" \ + " bne- 1b\n" \ + "2: " __ARCH_ACQ_INSTR \ + : "=&r" (__tmp) \ + : "b" (__memp), "r" (oldval), "r" (newval) \ + : "cr0", "memory"); \ + __tmp; \ + }) -#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \ +#define __arch_compare_and_exchange_val_32_rel(mem, newval, oldval) \ ({ \ __typeof (*(mem)) __tmp; \ __typeof (mem) __memp = (mem); \ @@ -80,14 +100,28 @@ typedef uintmax_t uatomic_max_t; " bne 2f\n" \ " stwcx. %3,0,%1\n" \ " bne- 1b\n" \ - "2: " __ARCH_ACQ_INSTR \ + "2: " \ : "=&r" (__tmp) \ : "b" (__memp), "r" (oldval), "r" (newval) \ : "cr0", "memory"); \ __tmp; \ }) -#define __arch_atomic_exchange_32(mem, value) \ +#define __arch_atomic_exchange_32_acq(mem, value) \ + ({ \ + __typeof (*mem) __val; \ + __asm __volatile ( \ + "1: lwarx %0,0,%2\n" \ + " stwcx. %3,0,%2\n" \ + " bne- 1b\n" \ + " " __ARCH_ACQ_INSTR \ + : "=&r" (__val), "=m" (*mem) \ + : "b" (mem), "r" (value), "1" (*mem) \ + : "cr0", "memory"); \ + __val; \ + }) + +#define __arch_atomic_exchange_32_rel(mem, value) \ ({ \ __typeof (*mem) __val; \ __asm __volatile (__ARCH_REL_INSTR "\n" \ @@ -96,7 +130,7 @@ typedef uintmax_t uatomic_max_t; " bne- 1b" \ : "=&r" (__val), "=m" (*mem) \ : "b" (mem), "r" (value), "1" (*mem) \ - : "cr0"); \ + : "cr0", "memory"); \ __val; \ }) @@ -109,7 +143,7 @@ typedef uintmax_t uatomic_max_t; " bne- 1b" \ : "=&b" (__val), "=&r" (__tmp), "=m" (*mem) \ : "b" (mem), "r" (value), "2" (*mem) \ - : "cr0"); \ + : "cr0", "memory"); \ __val; \ }) @@ -124,11 +158,10 @@ typedef uintmax_t uatomic_max_t; "2: " __ARCH_ACQ_INSTR \ : "=&b" (__val), "=&r" (__tmp), "=m" (*mem) \ : "b" (mem), "2" (*mem) \ - : "cr0"); \ + : "cr0", "memory"); \ __val; \ }) - #define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \ ({ \ __typeof (*(mem)) __result; \ @@ -140,14 +173,38 @@ typedef uintmax_t uatomic_max_t; abort (); \ __result; \ }) + +#define atomic_compare_and_exchange_val_rel(mem, newval, oldval) \ + ({ \ + __typeof (*(mem)) __result; \ + if (sizeof (*mem) == 4) \ + __result = __arch_compare_and_exchange_val_32_rel(mem, newval, oldval); \ + else if (sizeof (*mem) == 8) \ + __result = __arch_compare_and_exchange_val_64_rel(mem, newval, oldval); \ + else \ + abort (); \ + __result; \ + }) #define atomic_exchange_acq(mem, value) \ ({ \ __typeof (*(mem)) __result; \ if (sizeof (*mem) == 4) \ - __result = __arch_atomic_exchange_32 (mem, value); \ + __result = __arch_atomic_exchange_32_acq (mem, value); \ + else if (sizeof (*mem) == 8) \ + __result = __arch_atomic_exchange_64_acq (mem, value); \ + else \ + abort (); \ + __result; \ + }) + +#define atomic_exchange_rel(mem, value) \ + ({ \ + __typeof (*(mem)) __result; \ + if (sizeof (*mem) == 4) \ + __result = __arch_atomic_exchange_32_rel (mem, value); \ else if (sizeof (*mem) == 8) \ - __result = __arch_atomic_exchange_64 (mem, value); \ + __result = __arch_atomic_exchange_64_rel (mem, value); \ else \ abort (); \ __result; \ |