|
@@ -0,0 +1,369 @@
|
|
|
+/* Copyright (C) 2003 Free Software Foundation, Inc.
|
|
|
+ This file is part of the GNU C Library.
|
|
|
+
|
|
|
+ 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, write to the Free
|
|
|
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
|
+ 02111-1307 USA. */
|
|
|
+
|
|
|
+#include <stdint.h>
|
|
|
+
|
|
|
+typedef int8_t atomic8_t;
|
|
|
+typedef uint8_t uatomic8_t;
|
|
|
+typedef int_fast8_t atomic_fast8_t;
|
|
|
+typedef uint_fast8_t uatomic_fast8_t;
|
|
|
+
|
|
|
+typedef int16_t atomic16_t;
|
|
|
+typedef uint16_t uatomic16_t;
|
|
|
+typedef int_fast16_t atomic_fast16_t;
|
|
|
+typedef uint_fast16_t uatomic_fast16_t;
|
|
|
+
|
|
|
+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;
|
|
|
+
|
|
|
+
|
|
|
+#ifdef UP
|
|
|
+# define __MB /* nothing */
|
|
|
+#else
|
|
|
+# define __MB " mb\n"
|
|
|
+#endif
|
|
|
+
|
|
|
+
|
|
|
+/* Compare and exchange. For all of the "xxx" routines, we expect a
|
|
|
+ "__prev" and a "__cmp" variable to be provided by the enclosing scope,
|
|
|
+ in which values are returned. */
|
|
|
+
|
|
|
+#define __arch_compare_and_exchange_xxx_8_int(mem, new, old, mb1, mb2) \
|
|
|
+({ \
|
|
|
+ unsigned long __tmp, __snew, __addr64; \
|
|
|
+ __asm__ __volatile__ ( \
|
|
|
+ mb1 \
|
|
|
+ " andnot %[__addr8],7,%[__addr64]\n" \
|
|
|
+ " insbl %[__new],%[__addr8],%[__snew]\n" \
|
|
|
+ "1: ldq_l %[__tmp],0(%[__addr64])\n" \
|
|
|
+ " extbl %[__tmp],%[__addr8],%[__prev]\n" \
|
|
|
+ " cmpeq %[__prev],%[__old],%[__cmp]\n" \
|
|
|
+ " beq %[__cmp],2f\n" \
|
|
|
+ " mskbl %[__tmp],%[__addr8],%[__tmp]\n" \
|
|
|
+ " or %[__snew],%[__tmp],%[__tmp]\n" \
|
|
|
+ " stq_c %[__tmp],0(%[__addr64])\n" \
|
|
|
+ " beq %[__tmp],1b\n" \
|
|
|
+ mb2 \
|
|
|
+ "2:" \
|
|
|
+ : [__prev] "=&r" (__prev), \
|
|
|
+ [__snew] "=&r" (__snew), \
|
|
|
+ [__tmp] "=&r" (__tmp), \
|
|
|
+ [__cmp] "=&r" (__cmp), \
|
|
|
+ [__addr64] "=&r" (__addr64) \
|
|
|
+ : [__addr8] "r" (mem), \
|
|
|
+ [__old] "Ir" ((uint64_t)(uint8_t)(uint64_t)(old)), \
|
|
|
+ [__new] "r" (new) \
|
|
|
+ : "memory"); \
|
|
|
+})
|
|
|
+
|
|
|
+#define __arch_compare_and_exchange_xxx_16_int(mem, new, old, mb1, mb2) \
|
|
|
+({ \
|
|
|
+ unsigned long __tmp, __snew, __addr64; \
|
|
|
+ __asm__ __volatile__ ( \
|
|
|
+ mb1 \
|
|
|
+ " andnot %[__addr16],7,%[__addr64]\n" \
|
|
|
+ " inswl %[__new],%[__addr16],%[__snew]\n" \
|
|
|
+ "1: ldq_l %[__tmp],0(%[__addr64])\n" \
|
|
|
+ " extwl %[__tmp],%[__addr16],%[__prev]\n" \
|
|
|
+ " cmpeq %[__prev],%[__old],%[__cmp]\n" \
|
|
|
+ " beq %[__cmp],2f\n" \
|
|
|
+ " mskwl %[__tmp],%[__addr16],%[__tmp]\n" \
|
|
|
+ " or %[__snew],%[__tmp],%[__tmp]\n" \
|
|
|
+ " stq_c %[__tmp],0(%[__addr64])\n" \
|
|
|
+ " beq %[__tmp],1b\n" \
|
|
|
+ mb2 \
|
|
|
+ "2:" \
|
|
|
+ : [__prev] "=&r" (__prev), \
|
|
|
+ [__snew] "=&r" (__snew), \
|
|
|
+ [__tmp] "=&r" (__tmp), \
|
|
|
+ [__cmp] "=&r" (__cmp), \
|
|
|
+ [__addr64] "=&r" (__addr64) \
|
|
|
+ : [__addr16] "r" (mem), \
|
|
|
+ [__old] "Ir" ((uint64_t)(uint16_t)(uint64_t)(old)), \
|
|
|
+ [__new] "r" (new) \
|
|
|
+ : "memory"); \
|
|
|
+})
|
|
|
+
|
|
|
+#define __arch_compare_and_exchange_xxx_32_int(mem, new, old, mb1, mb2) \
|
|
|
+({ \
|
|
|
+ __asm__ __volatile__ ( \
|
|
|
+ mb1 \
|
|
|
+ "1: ldl_l %[__prev],%[__mem]\n" \
|
|
|
+ " cmpeq %[__prev],%[__old],%[__cmp]\n" \
|
|
|
+ " beq %[__cmp],2f\n" \
|
|
|
+ " mov %[__new],%[__cmp]\n" \
|
|
|
+ " stl_c %[__cmp],%[__mem]\n" \
|
|
|
+ " beq %[__cmp],1b\n" \
|
|
|
+ mb2 \
|
|
|
+ "2:" \
|
|
|
+ : [__prev] "=&r" (__prev), \
|
|
|
+ [__cmp] "=&r" (__cmp) \
|
|
|
+ : [__mem] "m" (*(mem)), \
|
|
|
+ [__old] "Ir" ((uint64_t)(atomic32_t)(uint64_t)(old)), \
|
|
|
+ [__new] "Ir" (new) \
|
|
|
+ : "memory"); \
|
|
|
+})
|
|
|
+
|
|
|
+#define __arch_compare_and_exchange_xxx_64_int(mem, new, old, mb1, mb2) \
|
|
|
+({ \
|
|
|
+ __asm__ __volatile__ ( \
|
|
|
+ mb1 \
|
|
|
+ "1: ldq_l %[__prev],%[__mem]\n" \
|
|
|
+ " cmpeq %[__prev],%[__old],%[__cmp]\n" \
|
|
|
+ " beq %[__cmp],2f\n" \
|
|
|
+ " mov %[__new],%[__cmp]\n" \
|
|
|
+ " stq_c %[__cmp],%[__mem]\n" \
|
|
|
+ " beq %[__cmp],1b\n" \
|
|
|
+ mb2 \
|
|
|
+ "2:" \
|
|
|
+ : [__prev] "=&r" (__prev), \
|
|
|
+ [__cmp] "=&r" (__cmp) \
|
|
|
+ : [__mem] "m" (*(mem)), \
|
|
|
+ [__old] "Ir" ((uint64_t)(old)), \
|
|
|
+ [__new] "Ir" (new) \
|
|
|
+ : "memory"); \
|
|
|
+})
|
|
|
+
|
|
|
+/* For all "bool" routines, we return FALSE if exchange succesful. */
|
|
|
+
|
|
|
+#define __arch_compare_and_exchange_bool_8_int(mem, new, old, mb1, mb2) \
|
|
|
+({ unsigned long __prev; int __cmp; \
|
|
|
+ __arch_compare_and_exchange_xxx_8_int(mem, new, old, mb1, mb2); \
|
|
|
+ !__cmp; })
|
|
|
+
|
|
|
+#define __arch_compare_and_exchange_bool_16_int(mem, new, old, mb1, mb2) \
|
|
|
+({ unsigned long __prev; int __cmp; \
|
|
|
+ __arch_compare_and_exchange_xxx_16_int(mem, new, old, mb1, mb2); \
|
|
|
+ !__cmp; })
|
|
|
+
|
|
|
+#define __arch_compare_and_exchange_bool_32_int(mem, new, old, mb1, mb2) \
|
|
|
+({ unsigned long __prev; int __cmp; \
|
|
|
+ __arch_compare_and_exchange_xxx_32_int(mem, new, old, mb1, mb2); \
|
|
|
+ !__cmp; })
|
|
|
+
|
|
|
+#define __arch_compare_and_exchange_bool_64_int(mem, new, old, mb1, mb2) \
|
|
|
+({ unsigned long __prev; int __cmp; \
|
|
|
+ __arch_compare_and_exchange_xxx_64_int(mem, new, old, mb1, mb2); \
|
|
|
+ !__cmp; })
|
|
|
+
|
|
|
+/* For all "val" routines, return the old value whether exchange
|
|
|
+ successful or not. */
|
|
|
+
|
|
|
+#define __arch_compare_and_exchange_val_8_int(mem, new, old, mb1, mb2) \
|
|
|
+({ unsigned long __prev; int __cmp; \
|
|
|
+ __arch_compare_and_exchange_xxx_8_int(mem, new, old, mb1, mb2); \
|
|
|
+ (typeof (*mem))__prev; })
|
|
|
+
|
|
|
+#define __arch_compare_and_exchange_val_16_int(mem, new, old, mb1, mb2) \
|
|
|
+({ unsigned long __prev; int __cmp; \
|
|
|
+ __arch_compare_and_exchange_xxx_16_int(mem, new, old, mb1, mb2); \
|
|
|
+ (typeof (*mem))__prev; })
|
|
|
+
|
|
|
+#define __arch_compare_and_exchange_val_32_int(mem, new, old, mb1, mb2) \
|
|
|
+({ unsigned long __prev; int __cmp; \
|
|
|
+ __arch_compare_and_exchange_xxx_32_int(mem, new, old, mb1, mb2); \
|
|
|
+ (typeof (*mem))__prev; })
|
|
|
+
|
|
|
+#define __arch_compare_and_exchange_val_64_int(mem, new, old, mb1, mb2) \
|
|
|
+({ unsigned long __prev; int __cmp; \
|
|
|
+ __arch_compare_and_exchange_xxx_64_int(mem, new, old, mb1, mb2); \
|
|
|
+ (typeof (*mem))__prev; })
|
|
|
+
|
|
|
+/* Compare and exchange with "acquire" semantics, ie barrier after. */
|
|
|
+
|
|
|
+#define atomic_compare_and_exchange_bool_acq(mem, new, old) \
|
|
|
+ __atomic_bool_bysize (__arch_compare_and_exchange_bool, int, \
|
|
|
+ mem, new, old, "", __MB)
|
|
|
+
|
|
|
+#define atomic_compare_and_exchange_val_acq(mem, new, old) \
|
|
|
+ __atomic_val_bysize (__arch_compare_and_exchange_val, int, \
|
|
|
+ mem, new, old, "", __MB)
|
|
|
+
|
|
|
+/* Compare and exchange with "release" semantics, ie barrier before. */
|
|
|
+
|
|
|
+#define atomic_compare_and_exchange_bool_rel(mem, new, old) \
|
|
|
+ __atomic_bool_bysize (__arch_compare_and_exchange_bool, int, \
|
|
|
+ mem, new, old, __MB, "")
|
|
|
+
|
|
|
+#define atomic_compare_and_exchange_val_rel(mem, new, old) \
|
|
|
+ __atomic_val_bysize (__arch_compare_and_exchange_val, int, \
|
|
|
+ mem, new, old, __MB, "")
|
|
|
+
|
|
|
+
|
|
|
+/* Atomically store value and return the previous value. */
|
|
|
+
|
|
|
+#define __arch_exchange_8_int(mem, value, mb1, mb2) \
|
|
|
+({ \
|
|
|
+ unsigned long __ret, __tmp, __addr64, __sval; \
|
|
|
+ __asm__ __volatile__ ( \
|
|
|
+ mb1 \
|
|
|
+ " andnot %[__addr8],7,%[__addr64]\n" \
|
|
|
+ " insbl %[__value],%[__addr8],%[__sval]\n" \
|
|
|
+ "1: ldq_l %[__tmp],0(%[__addr64])\n" \
|
|
|
+ " extbl %[__tmp],%[__addr8],%[__ret]\n" \
|
|
|
+ " mskbl %[__tmp],%[__addr8],%[__tmp]\n" \
|
|
|
+ " or %[__sval],%[__tmp],%[__tmp]\n" \
|
|
|
+ " stq_c %[__tmp],0(%[__addr64])\n" \
|
|
|
+ " beq %[__tmp],1b\n" \
|
|
|
+ mb2 \
|
|
|
+ : [__ret] "=&r" (__ret), \
|
|
|
+ [__sval] "=&r" (__sval), \
|
|
|
+ [__tmp] "=&r" (__tmp), \
|
|
|
+ [__addr64] "=&r" (__addr64) \
|
|
|
+ : [__addr8] "r" (mem), \
|
|
|
+ [__value] "r" (value) \
|
|
|
+ : "memory"); \
|
|
|
+ __ret; })
|
|
|
+
|
|
|
+#define __arch_exchange_16_int(mem, value, mb1, mb2) \
|
|
|
+({ \
|
|
|
+ unsigned long __ret, __tmp, __addr64, __sval; \
|
|
|
+ __asm__ __volatile__ ( \
|
|
|
+ mb1 \
|
|
|
+ " andnot %[__addr16],7,%[__addr64]\n" \
|
|
|
+ " inswl %[__value],%[__addr16],%[__sval]\n" \
|
|
|
+ "1: ldq_l %[__tmp],0(%[__addr64])\n" \
|
|
|
+ " extwl %[__tmp],%[__addr16],%[__ret]\n" \
|
|
|
+ " mskwl %[__tmp],%[__addr16],%[__tmp]\n" \
|
|
|
+ " or %[__sval],%[__tmp],%[__tmp]\n" \
|
|
|
+ " stq_c %[__tmp],0(%[__addr64])\n" \
|
|
|
+ " beq %[__tmp],1b\n" \
|
|
|
+ mb2 \
|
|
|
+ : [__ret] "=&r" (__ret), \
|
|
|
+ [__sval] "=&r" (__sval), \
|
|
|
+ [__tmp] "=&r" (__tmp), \
|
|
|
+ [__addr64] "=&r" (__addr64) \
|
|
|
+ : [__addr16] "r" (mem), \
|
|
|
+ [__value] "r" (value) \
|
|
|
+ : "memory"); \
|
|
|
+ __ret; })
|
|
|
+
|
|
|
+#define __arch_exchange_32_int(mem, value, mb1, mb2) \
|
|
|
+({ \
|
|
|
+ signed int __ret, __tmp; \
|
|
|
+ __asm__ __volatile__ ( \
|
|
|
+ mb1 \
|
|
|
+ "1: ldl_l %[__ret],%[__mem]\n" \
|
|
|
+ " mov %[__val],%[__tmp]\n" \
|
|
|
+ " stl_c %[__tmp],%[__mem]\n" \
|
|
|
+ " beq %[__tmp],1b\n" \
|
|
|
+ mb2 \
|
|
|
+ : [__ret] "=&r" (__ret), \
|
|
|
+ [__tmp] "=&r" (__tmp) \
|
|
|
+ : [__mem] "m" (*(mem)), \
|
|
|
+ [__val] "Ir" (value) \
|
|
|
+ : "memory"); \
|
|
|
+ __ret; })
|
|
|
+
|
|
|
+#define __arch_exchange_64_int(mem, value, mb1, mb2) \
|
|
|
+({ \
|
|
|
+ unsigned long __ret, __tmp; \
|
|
|
+ __asm__ __volatile__ ( \
|
|
|
+ mb1 \
|
|
|
+ "1: ldq_l %[__ret],%[__mem]\n" \
|
|
|
+ " mov %[__val],%[__tmp]\n" \
|
|
|
+ " stq_c %[__tmp],%[__mem]\n" \
|
|
|
+ " beq %[__tmp],1b\n" \
|
|
|
+ mb2 \
|
|
|
+ : [__ret] "=&r" (__ret), \
|
|
|
+ [__tmp] "=&r" (__tmp) \
|
|
|
+ : [__mem] "m" (*(mem)), \
|
|
|
+ [__val] "Ir" (value) \
|
|
|
+ : "memory"); \
|
|
|
+ __ret; })
|
|
|
+
|
|
|
+#define atomic_exchange_acq(mem, value) \
|
|
|
+ __atomic_val_bysize (__arch_exchange, int, mem, value, "", __MB)
|
|
|
+
|
|
|
+#define atomic_exchange_rel(mem, value) \
|
|
|
+ __atomic_val_bysize (__arch_exchange, int, mem, value, __MB, "")
|
|
|
+
|
|
|
+
|
|
|
+/* Atomically add value and return the previous (unincremented) value. */
|
|
|
+
|
|
|
+#define __arch_exchange_and_add_8_int(mem, value, mb1, mb2) \
|
|
|
+ ({ __builtin_trap (); 0; })
|
|
|
+
|
|
|
+#define __arch_exchange_and_add_16_int(mem, value, mb1, mb2) \
|
|
|
+ ({ __builtin_trap (); 0; })
|
|
|
+
|
|
|
+#define __arch_exchange_and_add_32_int(mem, value, mb1, mb2) \
|
|
|
+({ \
|
|
|
+ signed int __ret, __tmp; \
|
|
|
+ __asm__ __volatile__ ( \
|
|
|
+ mb1 \
|
|
|
+ "1: ldl_l %[__ret],%[__mem]\n" \
|
|
|
+ " addl %[__ret],%[__val],%[__tmp]\n" \
|
|
|
+ " stl_c %[__tmp],%[__mem]\n" \
|
|
|
+ " beq %[__tmp],1b\n" \
|
|
|
+ mb2 \
|
|
|
+ : [__ret] "=&r" (__ret), \
|
|
|
+ [__tmp] "=&r" (__tmp) \
|
|
|
+ : [__mem] "m" (*(mem)), \
|
|
|
+ [__val] "Ir" ((signed int)(value)) \
|
|
|
+ : "memory"); \
|
|
|
+ __ret; })
|
|
|
+
|
|
|
+#define __arch_exchange_and_add_64_int(mem, value, mb1, mb2) \
|
|
|
+({ \
|
|
|
+ unsigned long __ret, __tmp; \
|
|
|
+ __asm__ __volatile__ ( \
|
|
|
+ mb1 \
|
|
|
+ "1: ldq_l %[__ret],%[__mem]\n" \
|
|
|
+ " addq %[__ret],%[__val],%[__tmp]\n" \
|
|
|
+ " stq_c %[__tmp],%[__mem]\n" \
|
|
|
+ " beq %[__tmp],1b\n" \
|
|
|
+ mb2 \
|
|
|
+ : [__ret] "=&r" (__ret), \
|
|
|
+ [__tmp] "=&r" (__tmp) \
|
|
|
+ : [__mem] "m" (*(mem)), \
|
|
|
+ [__val] "Ir" ((unsigned long)(value)) \
|
|
|
+ : "memory"); \
|
|
|
+ __ret; })
|
|
|
+
|
|
|
+/* ??? Barrier semantics for atomic_exchange_and_add appear to be
|
|
|
+ undefined. Use full barrier for now, as that's safe. */
|
|
|
+#define atomic_exchange_and_add(mem, value) \
|
|
|
+ __atomic_val_bysize (__arch_exchange_and_add, int, mem, value, __MB, __MB)
|
|
|
+
|
|
|
+
|
|
|
+/* ??? Blah, I'm lazy. Implement these later. Can do better than the
|
|
|
+ compare-and-exchange loop provided by generic code.
|
|
|
+
|
|
|
+#define atomic_decrement_if_positive(mem)
|
|
|
+#define atomic_bit_test_set(mem, bit)
|
|
|
+
|
|
|
+*/
|
|
|
+
|
|
|
+#ifndef UP
|
|
|
+# define atomic_full_barrier() __asm ("mb" : : : "memory");
|
|
|
+# define atomic_read_barrier() __asm ("mb" : : : "memory");
|
|
|
+# define atomic_write_barrier() __asm ("wmb" : : : "memory");
|
|
|
+#endif
|