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Diffstat (limited to 'sysdeps/powerpc/atomic-machine.h')
| -rw-r--r-- | sysdeps/powerpc/atomic-machine.h | 345 |
1 files changed, 345 insertions, 0 deletions
diff --git a/sysdeps/powerpc/atomic-machine.h b/sysdeps/powerpc/atomic-machine.h new file mode 100644 index 0000000000..8b0e1e7284 --- /dev/null +++ b/sysdeps/powerpc/atomic-machine.h @@ -0,0 +1,345 @@ +/* Atomic operations. PowerPC Common version. + Copyright (C) 2003-2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +/* + * Never include sysdeps/powerpc/atomic-machine.h directly. + * Alway use include/atomic.h which will include either + * sysdeps/powerpc/powerpc32/atomic-machine.h + * or + * sysdeps/powerpc/powerpc64/atomic-machine.h + * as appropriate and which in turn include this file. + */ + +#include <stdint.h> + +typedef int32_t atomic32_t; +typedef uint32_t uatomic32_t; +typedef int_fast32_t atomic_fast32_t; +typedef uint_fast32_t uatomic_fast32_t; + +typedef int64_t atomic64_t; +typedef uint64_t uatomic64_t; +typedef int_fast64_t atomic_fast64_t; +typedef uint_fast64_t uatomic_fast64_t; + +typedef intptr_t atomicptr_t; +typedef uintptr_t uatomicptr_t; +typedef intmax_t atomic_max_t; +typedef uintmax_t uatomic_max_t; + +/* + * Powerpc does not have byte and halfword forms of load and reserve and + * store conditional. So for powerpc we stub out the 8- and 16-bit forms. + */ +#define __arch_compare_and_exchange_bool_8_acq(mem, newval, oldval) \ + (abort (), 0) + +#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" +# ifndef __ARCH_REL_INSTR +# define __ARCH_REL_INSTR "sync" +# endif +#endif + +#ifndef MUTEX_HINT_ACQ +# define MUTEX_HINT_ACQ +#endif +#ifndef MUTEX_HINT_REL +# define MUTEX_HINT_REL +#endif + +#define atomic_full_barrier() __asm ("sync" ::: "memory") + +#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" MUTEX_HINT_ACQ "\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_rel(mem, newval, oldval) \ + ({ \ + __typeof (*(mem)) __tmp; \ + __typeof (mem) __memp = (mem); \ + __asm __volatile (__ARCH_REL_INSTR "\n" \ + "1: lwarx %0,0,%1" MUTEX_HINT_REL "\n" \ + " cmpw %0,%2\n" \ + " bne 2f\n" \ + " stwcx. %3,0,%1\n" \ + " bne- 1b\n" \ + "2: " \ + : "=&r" (__tmp) \ + : "b" (__memp), "r" (oldval), "r" (newval) \ + : "cr0", "memory"); \ + __tmp; \ + }) + +#define __arch_atomic_exchange_32_acq(mem, value) \ + ({ \ + __typeof (*mem) __val; \ + __asm __volatile ( \ + "1: lwarx %0,0,%2" MUTEX_HINT_ACQ "\n" \ + " stwcx. %3,0,%2\n" \ + " bne- 1b\n" \ + " " __ARCH_ACQ_INSTR \ + : "=&r" (__val), "=m" (*mem) \ + : "b" (mem), "r" (value), "m" (*mem) \ + : "cr0", "memory"); \ + __val; \ + }) + +#define __arch_atomic_exchange_32_rel(mem, value) \ + ({ \ + __typeof (*mem) __val; \ + __asm __volatile (__ARCH_REL_INSTR "\n" \ + "1: lwarx %0,0,%2" MUTEX_HINT_REL "\n" \ + " stwcx. %3,0,%2\n" \ + " bne- 1b" \ + : "=&r" (__val), "=m" (*mem) \ + : "b" (mem), "r" (value), "m" (*mem) \ + : "cr0", "memory"); \ + __val; \ + }) + +#define __arch_atomic_exchange_and_add_32(mem, value) \ + ({ \ + __typeof (*mem) __val, __tmp; \ + __asm __volatile ("1: lwarx %0,0,%3\n" \ + " add %1,%0,%4\n" \ + " stwcx. %1,0,%3\n" \ + " bne- 1b" \ + : "=&b" (__val), "=&r" (__tmp), "=m" (*mem) \ + : "b" (mem), "r" (value), "m" (*mem) \ + : "cr0", "memory"); \ + __val; \ + }) + +#define __arch_atomic_exchange_and_add_32_acq(mem, value) \ + ({ \ + __typeof (*mem) __val, __tmp; \ + __asm __volatile ("1: lwarx %0,0,%3" MUTEX_HINT_ACQ "\n" \ + " add %1,%0,%4\n" \ + " stwcx. %1,0,%3\n" \ + " bne- 1b\n" \ + __ARCH_ACQ_INSTR \ + : "=&b" (__val), "=&r" (__tmp), "=m" (*mem) \ + : "b" (mem), "r" (value), "m" (*mem) \ + : "cr0", "memory"); \ + __val; \ + }) + +#define __arch_atomic_exchange_and_add_32_rel(mem, value) \ + ({ \ + __typeof (*mem) __val, __tmp; \ + __asm __volatile (__ARCH_REL_INSTR "\n" \ + "1: lwarx %0,0,%3" MUTEX_HINT_REL "\n" \ + " add %1,%0,%4\n" \ + " stwcx. %1,0,%3\n" \ + " bne- 1b" \ + : "=&b" (__val), "=&r" (__tmp), "=m" (*mem) \ + : "b" (mem), "r" (value), "m" (*mem) \ + : "cr0", "memory"); \ + __val; \ + }) + +#define __arch_atomic_increment_val_32(mem) \ + ({ \ + __typeof (*(mem)) __val; \ + __asm __volatile ("1: lwarx %0,0,%2\n" \ + " addi %0,%0,1\n" \ + " stwcx. %0,0,%2\n" \ + " bne- 1b" \ + : "=&b" (__val), "=m" (*mem) \ + : "b" (mem), "m" (*mem) \ + : "cr0", "memory"); \ + __val; \ + }) + +#define __arch_atomic_decrement_val_32(mem) \ + ({ \ + __typeof (*(mem)) __val; \ + __asm __volatile ("1: lwarx %0,0,%2\n" \ + " subi %0,%0,1\n" \ + " stwcx. %0,0,%2\n" \ + " bne- 1b" \ + : "=&b" (__val), "=m" (*mem) \ + : "b" (mem), "m" (*mem) \ + : "cr0", "memory"); \ + __val; \ + }) + +#define __arch_atomic_decrement_if_positive_32(mem) \ + ({ int __val, __tmp; \ + __asm __volatile ("1: lwarx %0,0,%3\n" \ + " cmpwi 0,%0,0\n" \ + " addi %1,%0,-1\n" \ + " ble 2f\n" \ + " stwcx. %1,0,%3\n" \ + " bne- 1b\n" \ + "2: " __ARCH_ACQ_INSTR \ + : "=&b" (__val), "=&r" (__tmp), "=m" (*mem) \ + : "b" (mem), "m" (*mem) \ + : "cr0", "memory"); \ + __val; \ + }) + +#define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \ + ({ \ + __typeof (*(mem)) __result; \ + if (sizeof (*mem) == 4) \ + __result = __arch_compare_and_exchange_val_32_acq(mem, newval, oldval); \ + else if (sizeof (*mem) == 8) \ + __result = __arch_compare_and_exchange_val_64_acq(mem, newval, oldval); \ + else \ + 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_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_rel (mem, value); \ + else \ + abort (); \ + __result; \ + }) + +#define atomic_exchange_and_add(mem, value) \ + ({ \ + __typeof (*(mem)) __result; \ + if (sizeof (*mem) == 4) \ + __result = __arch_atomic_exchange_and_add_32 (mem, value); \ + else if (sizeof (*mem) == 8) \ + __result = __arch_atomic_exchange_and_add_64 (mem, value); \ + else \ + abort (); \ + __result; \ + }) +#define atomic_exchange_and_add_acq(mem, value) \ + ({ \ + __typeof (*(mem)) __result; \ + if (sizeof (*mem) == 4) \ + __result = __arch_atomic_exchange_and_add_32_acq (mem, value); \ + else if (sizeof (*mem) == 8) \ + __result = __arch_atomic_exchange_and_add_64_acq (mem, value); \ + else \ + abort (); \ + __result; \ + }) +#define atomic_exchange_and_add_rel(mem, value) \ + ({ \ + __typeof (*(mem)) __result; \ + if (sizeof (*mem) == 4) \ + __result = __arch_atomic_exchange_and_add_32_rel (mem, value); \ + else if (sizeof (*mem) == 8) \ + __result = __arch_atomic_exchange_and_add_64_rel (mem, value); \ + else \ + abort (); \ + __result; \ + }) + +#define atomic_increment_val(mem) \ + ({ \ + __typeof (*(mem)) __result; \ + if (sizeof (*(mem)) == 4) \ + __result = __arch_atomic_increment_val_32 (mem); \ + else if (sizeof (*(mem)) == 8) \ + __result = __arch_atomic_increment_val_64 (mem); \ + else \ + abort (); \ + __result; \ + }) + +#define atomic_increment(mem) ({ atomic_increment_val (mem); (void) 0; }) + +#define atomic_decrement_val(mem) \ + ({ \ + __typeof (*(mem)) __result; \ + if (sizeof (*(mem)) == 4) \ + __result = __arch_atomic_decrement_val_32 (mem); \ + else if (sizeof (*(mem)) == 8) \ + __result = __arch_atomic_decrement_val_64 (mem); \ + else \ + abort (); \ + __result; \ + }) + +#define atomic_decrement(mem) ({ atomic_decrement_val (mem); (void) 0; }) + + +/* Decrement *MEM if it is > 0, and return the old value. */ +#define atomic_decrement_if_positive(mem) \ + ({ __typeof (*(mem)) __result; \ + if (sizeof (*mem) == 4) \ + __result = __arch_atomic_decrement_if_positive_32 (mem); \ + else if (sizeof (*mem) == 8) \ + __result = __arch_atomic_decrement_if_positive_64 (mem); \ + else \ + abort (); \ + __result; \ + }) |