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Diffstat (limited to 'sysdeps/i386/i486/bits/atomic.h')
-rw-r--r--sysdeps/i386/i486/bits/atomic.h107
1 files changed, 37 insertions, 70 deletions
diff --git a/sysdeps/i386/i486/bits/atomic.h b/sysdeps/i386/i486/bits/atomic.h
index 76e0e8e2e3..49cea18d58 100644
--- a/sysdeps/i386/i486/bits/atomic.h
+++ b/sysdeps/i386/i486/bits/atomic.h
@@ -63,35 +63,26 @@ typedef uintmax_t uatomic_max_t;
#define __arch_c_compare_and_exchange_val_8_acq(mem, newval, oldval) \
({ __typeof (*mem) ret; \
- __asm __volatile ("cmpl $0, %%gs:%P5\n\t" \
- "je 0f\n\t" \
- "lock\n" \
- "0:\tcmpxchgb %b2, %1" \
+ __asm __volatile ("lock\n" \
+ "\tcmpxchgb %b2, %1" \
: "=a" (ret), "=m" (*mem) \
- : "q" (newval), "m" (*mem), "0" (oldval), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "q" (newval), "m" (*mem), "0" (oldval)); \
ret; })
#define __arch_c_compare_and_exchange_val_16_acq(mem, newval, oldval) \
({ __typeof (*mem) ret; \
- __asm __volatile ("cmpl $0, %%gs:%P5\n\t" \
- "je 0f\n\t" \
- "lock\n" \
- "0:\tcmpxchgw %w2, %1" \
+ __asm __volatile ("lock\n" \
+ "\tcmpxchgw %w2, %1" \
: "=a" (ret), "=m" (*mem) \
- : "r" (newval), "m" (*mem), "0" (oldval), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "r" (newval), "m" (*mem), "0" (oldval)); \
ret; })
#define __arch_c_compare_and_exchange_val_32_acq(mem, newval, oldval) \
({ __typeof (*mem) ret; \
- __asm __volatile ("cmpl $0, %%gs:%P5\n\t" \
- "je 0f\n\t" \
- "lock\n" \
- "0:\tcmpxchgl %2, %1" \
+ __asm __volatile ("lock\n" \
+ "\tcmpxchgl %2, %1" \
: "=a" (ret), "=m" (*mem) \
- : "r" (newval), "m" (*mem), "0" (oldval), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "r" (newval), "m" (*mem), "0" (oldval)); \
ret; })
/* XXX We do not really need 64-bit compare-and-exchange. At least
@@ -132,10 +123,8 @@ typedef uintmax_t uatomic_max_t;
# define __arch_c_compare_and_exchange_val_64_acq(mem, newval, oldval) \
({ __typeof (*mem) ret; \
__asm __volatile ("xchgl %2, %%ebx\n\t" \
- "cmpl $0, %%gs:%P7\n\t" \
- "je 0f\n\t" \
"lock\n" \
- "0:\tcmpxchg8b %1\n\t" \
+ "\tcmpxchg8b %1\n\t" \
"xchgl %2, %%ebx" \
: "=A" (ret), "=m" (*mem) \
: "DS" (((unsigned long long int) (newval)) \
@@ -143,8 +132,7 @@ typedef uintmax_t uatomic_max_t;
"c" (((unsigned long long int) (newval)) >> 32), \
"m" (*mem), "a" (((unsigned long long int) (oldval)) \
& 0xffffffff), \
- "d" (((unsigned long long int) (oldval)) >> 32), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ "d" (((unsigned long long int) (oldval)) >> 32)); \
ret; })
# else
# define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
@@ -161,18 +149,15 @@ typedef uintmax_t uatomic_max_t;
# define __arch_c_compare_and_exchange_val_64_acq(mem, newval, oldval) \
({ __typeof (*mem) ret; \
- __asm __volatile ("cmpl $0, %%gs:%P7\n\t" \
- "je 0f\n\t" \
- "lock\n" \
- "0:\tcmpxchg8b %1" \
+ __asm __volatile ("lock\n" \
+ "\tcmpxchg8b %1" \
: "=A" (ret), "=m" (*mem) \
: "b" (((unsigned long long int) (newval)) \
& 0xffffffff), \
"c" (((unsigned long long int) (newval)) >> 32), \
"m" (*mem), "a" (((unsigned long long int) (oldval)) \
& 0xffffffff), \
- "d" (((unsigned long long int) (oldval)) >> 32), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ "d" (((unsigned long long int) (oldval)) >> 32)); \
ret; })
# endif
#endif
@@ -207,18 +192,15 @@ typedef uintmax_t uatomic_max_t;
if (sizeof (*mem) == 1) \
__asm __volatile (lock "xaddb %b0, %1" \
: "=q" (__result), "=m" (*mem) \
- : "0" (__addval), "m" (*mem), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "0" (__addval), "m" (*mem)); \
else if (sizeof (*mem) == 2) \
__asm __volatile (lock "xaddw %w0, %1" \
: "=r" (__result), "=m" (*mem) \
- : "0" (__addval), "m" (*mem), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "0" (__addval), "m" (*mem)); \
else if (sizeof (*mem) == 4) \
__asm __volatile (lock "xaddl %0, %1" \
: "=r" (__result), "=m" (*mem) \
- : "0" (__addval), "m" (*mem), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "0" (__addval), "m" (*mem)); \
else \
{ \
__typeof (mem) __memp = (mem); \
@@ -235,7 +217,7 @@ typedef uintmax_t uatomic_max_t;
__sync_fetch_and_add (mem, value)
#define __arch_exchange_and_add_cprefix \
- "cmpl $0, %%gs:%P4\n\tje 0f\n\tlock\n0:\t"
+ "lock\n\t"
#define catomic_exchange_and_add(mem, value) \
__arch_exchange_and_add_body (__arch_exchange_and_add_cprefix, __arch_c, \
@@ -251,18 +233,15 @@ typedef uintmax_t uatomic_max_t;
else if (sizeof (*mem) == 1) \
__asm __volatile (lock "addb %b1, %0" \
: "=m" (*mem) \
- : "iq" (value), "m" (*mem), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "iq" (value), "m" (*mem)); \
else if (sizeof (*mem) == 2) \
__asm __volatile (lock "addw %w1, %0" \
: "=m" (*mem) \
- : "ir" (value), "m" (*mem), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "ir" (value), "m" (*mem)); \
else if (sizeof (*mem) == 4) \
__asm __volatile (lock "addl %1, %0" \
: "=m" (*mem) \
- : "ir" (value), "m" (*mem), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "ir" (value), "m" (*mem)); \
else \
{ \
__typeof (value) __addval = (value); \
@@ -280,7 +259,7 @@ typedef uintmax_t uatomic_max_t;
__arch_add_body (LOCK_PREFIX, __arch, mem, value)
#define __arch_add_cprefix \
- "cmpl $0, %%gs:%P3\n\tje 0f\n\tlock\n0:\t"
+ "lock\n\t"
#define catomic_add(mem, value) \
__arch_add_body (__arch_add_cprefix, __arch_c, mem, value)
@@ -329,18 +308,15 @@ typedef uintmax_t uatomic_max_t;
if (sizeof (*mem) == 1) \
__asm __volatile (lock "incb %b0" \
: "=m" (*mem) \
- : "m" (*mem), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "m" (*mem)); \
else if (sizeof (*mem) == 2) \
__asm __volatile (lock "incw %w0" \
: "=m" (*mem) \
- : "m" (*mem), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "m" (*mem)); \
else if (sizeof (*mem) == 4) \
__asm __volatile (lock "incl %0" \
: "=m" (*mem) \
- : "m" (*mem), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "m" (*mem)); \
else \
{ \
__typeof (mem) __memp = (mem); \
@@ -356,7 +332,7 @@ typedef uintmax_t uatomic_max_t;
#define atomic_increment(mem) __arch_increment_body (LOCK_PREFIX, __arch, mem)
#define __arch_increment_cprefix \
- "cmpl $0, %%gs:%P2\n\tje 0f\n\tlock\n0:\t"
+ "lock\n\t"
#define catomic_increment(mem) \
__arch_increment_body (__arch_increment_cprefix, __arch_c, mem)
@@ -386,18 +362,15 @@ typedef uintmax_t uatomic_max_t;
if (sizeof (*mem) == 1) \
__asm __volatile (lock "decb %b0" \
: "=m" (*mem) \
- : "m" (*mem), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "m" (*mem)); \
else if (sizeof (*mem) == 2) \
__asm __volatile (lock "decw %w0" \
: "=m" (*mem) \
- : "m" (*mem), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "m" (*mem)); \
else if (sizeof (*mem) == 4) \
__asm __volatile (lock "decl %0" \
: "=m" (*mem) \
- : "m" (*mem), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "m" (*mem)); \
else \
{ \
__typeof (mem) __memp = (mem); \
@@ -413,7 +386,7 @@ typedef uintmax_t uatomic_max_t;
#define atomic_decrement(mem) __arch_decrement_body (LOCK_PREFIX, __arch, mem)
#define __arch_decrement_cprefix \
- "cmpl $0, %%gs:%P2\n\tje 0f\n\tlock\n0:\t"
+ "lock\n\t"
#define catomic_decrement(mem) \
__arch_decrement_body (__arch_decrement_cprefix, __arch_c, mem)
@@ -484,24 +457,21 @@ typedef uintmax_t uatomic_max_t;
if (sizeof (*mem) == 1) \
__asm __volatile (lock "andb %b1, %0" \
: "=m" (*mem) \
- : "iq" (mask), "m" (*mem), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "iq" (mask), "m" (*mem)); \
else if (sizeof (*mem) == 2) \
__asm __volatile (lock "andw %w1, %0" \
: "=m" (*mem) \
- : "ir" (mask), "m" (*mem), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "ir" (mask), "m" (*mem)); \
else if (sizeof (*mem) == 4) \
__asm __volatile (lock "andl %1, %0" \
: "=m" (*mem) \
- : "ir" (mask), "m" (*mem), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "ir" (mask), "m" (*mem)); \
else \
abort (); \
} while (0)
#define __arch_cprefix \
- "cmpl $0, %%gs:%P3\n\tje 0f\n\tlock\n0:\t"
+ "lock\n\t"
#define atomic_and(mem, mask) __arch_and_body (LOCK_PREFIX, mem, mask)
@@ -513,18 +483,15 @@ typedef uintmax_t uatomic_max_t;
if (sizeof (*mem) == 1) \
__asm __volatile (lock "orb %b1, %0" \
: "=m" (*mem) \
- : "iq" (mask), "m" (*mem), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "iq" (mask), "m" (*mem)); \
else if (sizeof (*mem) == 2) \
__asm __volatile (lock "orw %w1, %0" \
: "=m" (*mem) \
- : "ir" (mask), "m" (*mem), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "ir" (mask), "m" (*mem)); \
else if (sizeof (*mem) == 4) \
__asm __volatile (lock "orl %1, %0" \
: "=m" (*mem) \
- : "ir" (mask), "m" (*mem), \
- "i" (offsetof (tcbhead_t, multiple_threads))); \
+ : "ir" (mask), "m" (*mem)); \
else \
abort (); \
} while (0)
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