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authorUlrich Drepper <drepper@redhat.com>2002-07-16 01:02:04 +0000
committerUlrich Drepper <drepper@redhat.com>2002-07-16 01:02:04 +0000
commita99bfa85d82aecc3eb780779377a9e178e7189d2 (patch)
tree682a57a683bcf9e64cf0230f4a3648d20aa49217 /sysdeps/mips/atomicity.h
parent807bce82b385e7542f94a2fef994725b368a13b4 (diff)
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Update.
2002-07-02 H.J. Lu <hjl@gnu.org> * sysdeps/mips/atomicity.h: Don't include <sgidefs.h>. Always use ll/sc. * sysdeps/unix/sysv/linux/mips/sys/tas.h: Likewise. * sysdeps/unix/sysv/linux/configure.in: Set arch_minimum_kernel to 2.4.0 for mips. TLS fail if USE_TLS is not defined.
Diffstat (limited to 'sysdeps/mips/atomicity.h')
-rw-r--r--sysdeps/mips/atomicity.h45
1 files changed, 9 insertions, 36 deletions
diff --git a/sysdeps/mips/atomicity.h b/sysdeps/mips/atomicity.h
index b4b7b64dd0..bccacd9c90 100644
--- a/sysdeps/mips/atomicity.h
+++ b/sysdeps/mips/atomicity.h
@@ -20,11 +20,8 @@
#ifndef _MIPS_ATOMICITY_H
#define _MIPS_ATOMICITY_H 1
-#include <sgidefs.h>
#include <inttypes.h>
-#if (_MIPS_ISA >= _MIPS_ISA_MIPS2)
-
static inline int
__attribute__ ((unused))
exchange_and_add (volatile uint32_t *mem, int val)
@@ -34,9 +31,12 @@ exchange_and_add (volatile uint32_t *mem, int val)
__asm__ __volatile__
("/* Inline exchange & add */\n"
"1:\n\t"
+ ".set push\n\t"
+ ".set mips2\n\t"
"ll %0,%3\n\t"
"addu %1,%4,%0\n\t"
"sc %1,%2\n\t"
+ ".set pop\n\t"
"beqz %1,1b\n\t"
"/* End exchange & add */"
: "=&r"(result), "=&r"(tmp), "=m"(*mem)
@@ -55,9 +55,12 @@ atomic_add (volatile uint32_t *mem, int val)
__asm__ __volatile__
("/* Inline atomic add */\n"
"1:\n\t"
+ ".set push\n\t"
+ ".set mips2\n\t"
"ll %0,%2\n\t"
"addu %0,%3,%0\n\t"
"sc %0,%1\n\t"
+ ".set pop\n\t"
"beqz %0,1b\n\t"
"/* End atomic add */"
: "=&r"(result), "=m"(*mem)
@@ -74,11 +77,14 @@ compare_and_swap (volatile long int *p, long int oldval, long int newval)
__asm__ __volatile__
("/* Inline compare & swap */\n"
"1:\n\t"
+ ".set push\n\t"
+ ".set mips2\n\t"
"ll %1,%5\n\t"
"move %0,$0\n\t"
"bne %1,%3,2f\n\t"
"move %0,%4\n\t"
"sc %0,%2\n\t"
+ ".set pop\n\t"
"beqz %0,1b\n"
"2:\n\t"
"/* End compare & swap */"
@@ -89,37 +95,4 @@ compare_and_swap (volatile long int *p, long int oldval, long int newval)
return ret;
}
-#else /* (_MIPS_ISA >= _MIPS_ISA_MIPS2) */
-
-#warning MIPS I atomicity functions are not atomic
-
-static inline int
-__attribute__ ((unused))
-exchange_and_add (volatile uint32_t *mem, int val)
-{
- int result = *mem;
- *mem += val;
- return result;
-}
-
-static inline void
-__attribute__ ((unused))
-atomic_add (volatile uint32_t *mem, int val)
-{
- *mem += val;
-}
-
-static inline int
-__attribute__ ((unused))
-compare_and_swap (volatile long int *p, long int oldval, long int newval)
-{
- if (*p != oldval)
- return 0;
-
- *p = newval;
- return 1;
-}
-
-#endif /* !(_MIPS_ISA >= _MIPS_ISA_MIPS2) */
-
#endif /* atomicity.h */