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alpha atomic.h
- From: Richard Henderson <rth at twiddle dot net>
- To: libc-alpha at gcc dot gnu dot org
- Date: Tue, 24 Jun 2003 10:05:17 -0700
- Subject: alpha atomic.h
Working toward nptl support. Committed.
r~
* sysdeps/alpha/bits/atomic.h: New file.
Index: sysdeps/alpha/bits/atomic.h
===================================================================
RCS file: sysdeps/alpha/bits/atomic.h
diff -N sysdeps/alpha/bits/atomic.h
*** /dev/null 1 Jan 1970 00:00:00 -0000
--- sysdeps/alpha/bits/atomic.h 24 Jun 2003 17:02:28 -0000
***************
*** 0 ****
--- 1,367 ----
+ /* 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)(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)(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)(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" (old), \
+ [__new] "Ir" (new) \
+ : "memory"); \
+ })
+
+ /* For all "bool" routines, we return true 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); \
+ __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); \
+ __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); \
+ __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); \
+ __prev; })
+
+ /* Compare and exchange with "acquire" semantics, ie barrier after. */
+
+ #define atomic_compare_and_exchange_bool_acq(mem, new, old) \
+ __atomic_val_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_val_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 %[__addr8],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 %[__ret],%[__tmp]\n" \
+ " stl_c %[__tmp],%[__mem]\n" \
+ " beq %[__tmp],1b\n" \
+ mb2 \
+ : [__ret] "=&r" (__ret), \
+ [__tmp] "=&r" (__tmp) \
+ : [__mem] "m" (*(mem)) \
+ : "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 %[__ret],%[__tmp]\n" \
+ " stq_c %[__tmp],%[__mem]\n" \
+ " beq %[__tmp],1b\n" \
+ mb2 \
+ : [__ret] "=&r" (__ret), \
+ [__tmp] "=&r" (__tmp) \
+ : [__mem] "m" (*(mem)) \
+ : "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