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-rw-r--r--sysdeps/i386/bits/atomic.h410
1 files changed, 0 insertions, 410 deletions
diff --git a/sysdeps/i386/bits/atomic.h b/sysdeps/i386/bits/atomic.h
deleted file mode 100644
index aa3f901877..0000000000
--- a/sysdeps/i386/bits/atomic.h
+++ /dev/null
@@ -1,410 +0,0 @@
-/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
-
- 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;
-
-
-#ifndef LOCK_PREFIX
-# ifdef UP
-# define LOCK_PREFIX /* nothing */
-# else
-# define LOCK_PREFIX "lock;"
-# endif
-#endif
-
-/* i386 doesn't have cmpxchg* and xadd*. Instead of being completely
- non-atomic, atomic_* macros that are using solely i386 instructions
- are using those atomic instructions and the remaining ones are
- non-atomic. When in nscd, use i486+ instructions if on i486+. */
-
-#ifdef IS_IN_nscd
-
-extern int has_cmpxchg attribute_hidden;
-
-#define atomic_supports_shared has_cmpxchg
-
-#define atomic_init_nscd \
-int has_cmpxchg attribute_hidden; \
-static void __attribute__((constructor)) \
-init_has_cmpxchg (void) \
-{ \
- int fl1, fl2; \
- __asm__ ("pushfl; pushfl; popl %0; movl %0,%1; xorl %2,%0;" \
- "pushl %0; popfl; pushfl; popl %0; popfl" \
- : "=&r" (fl1), "=&r" (fl2) : "i" (0x00040000)); \
- if ((fl1 ^ fl2) & 0x00040000) \
- has_cmpxchg = 1; \
-}
-
-# define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
- ({ __typeof (*mem) ret; \
- if (__builtin_expect (has_cmpxchg, 1)) \
- __asm __volatile (LOCK_PREFIX "cmpxchgb %b2, %1" \
- : "=a" (ret), "=m" (*mem) \
- : "q" (newval), "m" (*mem), "0" (oldval)); \
- else \
- { \
- ret = *mem; \
- if (ret == oldval) \
- *mem = (newval); \
- } \
- ret; })
-
-# define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \
- ({ __typeof (*mem) ret; \
- if (__builtin_expect (has_cmpxchg, 1)) \
- __asm __volatile (LOCK_PREFIX "cmpxchgw %w2, %1" \
- : "=a" (ret), "=m" (*mem) \
- : "r" (newval), "m" (*mem), "0" (oldval)); \
- else \
- { \
- ret = *mem; \
- if (ret == oldval) \
- *mem = (newval); \
- } \
- ret; })
-
-# define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
- ({ __typeof (*mem) ret; \
- if (__builtin_expect (has_cmpxchg, 1)) \
- __asm __volatile (LOCK_PREFIX "cmpxchgl %2, %1" \
- : "=a" (ret), "=m" (*mem) \
- : "r" (newval), "m" (*mem), "0" (oldval)); \
- else \
- { \
- ret = *mem; \
- if (ret == oldval) \
- *mem = (newval); \
- } \
- ret; })
-
-/* XXX We do not really need 64-bit compare-and-exchange. At least
- not in the moment. */
-# define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
- ({ __typeof (*mem) ret = *(mem); abort (); ret = (newval); ret = (oldval); })
-
-
-# define atomic_exchange_and_add(mem, value) \
- ({ __typeof (*mem) __result; \
- __typeof (value) __addval = (value); \
- if (__builtin_expect (! has_cmpxchg, 0)) \
- { \
- __typeof (mem) __memp = (mem); \
- __result = *__memp; \
- *__memp += __addval; \
- } \
- else if (sizeof (*mem) == 1) \
- __asm __volatile (LOCK_PREFIX "xaddb %b0, %1" \
- : "=r" (__result), "=m" (*mem) \
- : "0" (__addval), "m" (*mem)); \
- else if (sizeof (*mem) == 2) \
- __asm __volatile (LOCK_PREFIX "xaddw %w0, %1" \
- : "=r" (__result), "=m" (*mem) \
- : "0" (__addval), "m" (*mem)); \
- else if (sizeof (*mem) == 4) \
- __asm __volatile (LOCK_PREFIX "xaddl %0, %1" \
- : "=r" (__result), "=m" (*mem) \
- : "0" (__addval), "m" (*mem)); \
- else \
- { \
- __typeof (mem) __memp = (mem); \
- __typeof (*mem) __tmpval; \
- __result = *__memp; \
- do \
- __tmpval = __result; \
- while ((__result = __arch_compare_and_exchange_val_64_acq \
- (__memp, __result + __addval, __result)) == __tmpval); \
- } \
- __result; })
-
-#else
-
-/* We have by default no support for atomic operations. So define
- them non-atomic. If this is a problem somebody will have to come
- up with real definitions. */
-
-/* The only basic operation needed is compare and exchange. */
-#define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \
- ({ __typeof (mem) __gmemp = (mem); \
- __typeof (*mem) __gret = *__gmemp; \
- __typeof (*mem) __gnewval = (newval); \
- \
- if (__gret == (oldval)) \
- *__gmemp = __gnewval; \
- __gret; })
-
-#define atomic_compare_and_exchange_bool_acq(mem, newval, oldval) \
- ({ __typeof (mem) __gmemp = (mem); \
- __typeof (*mem) __gnewval = (newval); \
- \
- *__gmemp == (oldval) ? (*__gmemp = __gnewval, 0) : 1; })
-
-/* XXX We do not really need 64-bit compare-and-exchange. At least
- not in the moment. */
-# define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
- ({ __typeof (*mem) ret = *(mem); abort (); ret = (newval); ret = (oldval); })
-
-#endif
-
-/* Note that we need no lock prefix. */
-#define atomic_exchange_acq(mem, newvalue) \
- ({ __typeof (*mem) result; \
- if (sizeof (*mem) == 1) \
- __asm __volatile ("xchgb %b0, %1" \
- : "=r" (result), "=m" (*mem) \
- : "0" (newvalue), "m" (*mem)); \
- else if (sizeof (*mem) == 2) \
- __asm __volatile ("xchgw %w0, %1" \
- : "=r" (result), "=m" (*mem) \
- : "0" (newvalue), "m" (*mem)); \
- else if (sizeof (*mem) == 4) \
- __asm __volatile ("xchgl %0, %1" \
- : "=r" (result), "=m" (*mem) \
- : "0" (newvalue), "m" (*mem)); \
- else \
- { \
- result = 0; \
- abort (); \
- } \
- result; })
-
-
-#define atomic_add(mem, value) \
- (void) ({ if (__builtin_constant_p (value) && (value) == 1) \
- atomic_increment (mem); \
- else if (__builtin_constant_p (value) && (value) == -1) \
- atomic_decrement (mem); \
- else if (sizeof (*mem) == 1) \
- __asm __volatile (LOCK_PREFIX "addb %b1, %0" \
- : "=m" (*mem) \
- : "ir" (value), "m" (*mem)); \
- else if (sizeof (*mem) == 2) \
- __asm __volatile (LOCK_PREFIX "addw %w1, %0" \
- : "=m" (*mem) \
- : "ir" (value), "m" (*mem)); \
- else if (sizeof (*mem) == 4) \
- __asm __volatile (LOCK_PREFIX "addl %1, %0" \
- : "=m" (*mem) \
- : "ir" (value), "m" (*mem)); \
- else \
- { \
- __typeof (value) __addval = (value); \
- __typeof (mem) __memp = (mem); \
- __typeof (*mem) __oldval = *__memp; \
- __typeof (*mem) __tmpval; \
- do \
- __tmpval = __oldval; \
- while ((__oldval = __arch_compare_and_exchange_val_64_acq \
- (__memp, __oldval + __addval, __oldval)) == __tmpval); \
- } \
- })
-
-
-#define atomic_add_negative(mem, value) \
- ({ unsigned char __result; \
- if (sizeof (*mem) == 1) \
- __asm __volatile (LOCK_PREFIX "addb %b2, %0; sets %1" \
- : "=m" (*mem), "=qm" (__result) \
- : "iq" (value), "m" (*mem)); \
- else if (sizeof (*mem) == 2) \
- __asm __volatile (LOCK_PREFIX "addw %w2, %0; sets %1" \
- : "=m" (*mem), "=qm" (__result) \
- : "ir" (value), "m" (*mem)); \
- else if (sizeof (*mem) == 4) \
- __asm __volatile (LOCK_PREFIX "addl %2, %0; sets %1" \
- : "=m" (*mem), "=qm" (__result) \
- : "ir" (value), "m" (*mem)); \
- else \
- abort (); \
- __result; })
-
-
-#define atomic_add_zero(mem, value) \
- ({ unsigned char __result; \
- if (sizeof (*mem) == 1) \
- __asm __volatile (LOCK_PREFIX "addb %b2, %0; setz %1" \
- : "=m" (*mem), "=qm" (__result) \
- : "ir" (value), "m" (*mem)); \
- else if (sizeof (*mem) == 2) \
- __asm __volatile (LOCK_PREFIX "addw %w2, %0; setz %1" \
- : "=m" (*mem), "=qm" (__result) \
- : "ir" (value), "m" (*mem)); \
- else if (sizeof (*mem) == 4) \
- __asm __volatile (LOCK_PREFIX "addl %2, %0; setz %1" \
- : "=m" (*mem), "=qm" (__result) \
- : "ir" (value), "m" (*mem)); \
- else \
- abort (); \
- __result; })
-
-
-#define atomic_increment(mem) \
- (void) ({ if (sizeof (*mem) == 1) \
- __asm __volatile (LOCK_PREFIX "incb %b0" \
- : "=m" (*mem) \
- : "m" (*mem)); \
- else if (sizeof (*mem) == 2) \
- __asm __volatile (LOCK_PREFIX "incw %w0" \
- : "=m" (*mem) \
- : "m" (*mem)); \
- else if (sizeof (*mem) == 4) \
- __asm __volatile (LOCK_PREFIX "incl %0" \
- : "=m" (*mem) \
- : "m" (*mem)); \
- else \
- { \
- __typeof (mem) __memp = (mem); \
- __typeof (*mem) __oldval = *__memp; \
- __typeof (*mem) __tmpval; \
- do \
- __tmpval = __oldval; \
- while ((__oldval = __arch_compare_and_exchange_val_64_acq \
- (__memp, __oldval + 1, __oldval)) == __tmpval); \
- } \
- })
-
-
-#define atomic_increment_and_test(mem) \
- ({ unsigned char __result; \
- if (sizeof (*mem) == 1) \
- __asm __volatile (LOCK_PREFIX "incb %0; sete %b1" \
- : "=m" (*mem), "=qm" (__result) \
- : "m" (*mem)); \
- else if (sizeof (*mem) == 2) \
- __asm __volatile (LOCK_PREFIX "incw %0; sete %w1" \
- : "=m" (*mem), "=qm" (__result) \
- : "m" (*mem)); \
- else if (sizeof (*mem) == 4) \
- __asm __volatile (LOCK_PREFIX "incl %0; sete %1" \
- : "=m" (*mem), "=qm" (__result) \
- : "m" (*mem)); \
- else \
- abort (); \
- __result; })
-
-
-#define atomic_decrement(mem) \
- (void) ({ if (sizeof (*mem) == 1) \
- __asm __volatile (LOCK_PREFIX "decb %b0" \
- : "=m" (*mem) \
- : "m" (*mem)); \
- else if (sizeof (*mem) == 2) \
- __asm __volatile (LOCK_PREFIX "decw %w0" \
- : "=m" (*mem) \
- : "m" (*mem)); \
- else if (sizeof (*mem) == 4) \
- __asm __volatile (LOCK_PREFIX "decl %0" \
- : "=m" (*mem) \
- : "m" (*mem)); \
- else \
- { \
- __typeof (mem) __memp = (mem); \
- __typeof (*mem) __oldval = *__memp; \
- __typeof (*mem) __tmpval; \
- do \
- __tmpval = __oldval; \
- while ((__oldval = __arch_compare_and_exchange_val_64_acq \
- (__memp, __oldval - 1, __oldval)) == __tmpval); \
- } \
- })
-
-
-#define atomic_decrement_and_test(mem) \
- ({ unsigned char __result; \
- if (sizeof (*mem) == 1) \
- __asm __volatile (LOCK_PREFIX "decb %b0; sete %1" \
- : "=m" (*mem), "=qm" (__result) \
- : "m" (*mem)); \
- else if (sizeof (*mem) == 2) \
- __asm __volatile (LOCK_PREFIX "decw %w0; sete %1" \
- : "=m" (*mem), "=qm" (__result) \
- : "m" (*mem)); \
- else if (sizeof (*mem) == 4) \
- __asm __volatile (LOCK_PREFIX "decl %0; sete %1" \
- : "=m" (*mem), "=qm" (__result) \
- : "m" (*mem)); \
- else \
- abort (); \
- __result; })
-
-
-#define atomic_bit_set(mem, bit) \
- (void) ({ if (sizeof (*mem) == 1) \
- __asm __volatile (LOCK_PREFIX "orb %b2, %0" \
- : "=m" (*mem) \
- : "m" (*mem), "ir" (1 << (bit))); \
- else if (sizeof (*mem) == 2) \
- __asm __volatile (LOCK_PREFIX "orw %w2, %0" \
- : "=m" (*mem) \
- : "m" (*mem), "ir" (1 << (bit))); \
- else if (sizeof (*mem) == 4) \
- __asm __volatile (LOCK_PREFIX "orl %2, %0" \
- : "=m" (*mem) \
- : "m" (*mem), "ir" (1 << (bit))); \
- else \
- abort (); \
- })
-
-
-#define atomic_bit_test_set(mem, bit) \
- ({ unsigned char __result; \
- if (sizeof (*mem) == 1) \
- __asm __volatile (LOCK_PREFIX "btsb %3, %1; setc %0" \
- : "=q" (__result), "=m" (*mem) \
- : "m" (*mem), "ir" (bit)); \
- else if (sizeof (*mem) == 2) \
- __asm __volatile (LOCK_PREFIX "btsw %3, %1; setc %0" \
- : "=q" (__result), "=m" (*mem) \
- : "m" (*mem), "ir" (bit)); \
- else if (sizeof (*mem) == 4) \
- __asm __volatile (LOCK_PREFIX "btsl %3, %1; setc %0" \
- : "=q" (__result), "=m" (*mem) \
- : "m" (*mem), "ir" (bit)); \
- else \
- abort (); \
- __result; })
-
-
-#define atomic_delay() asm ("rep; nop")
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