[BZ #4586]

2007-06-06  Jakub Jelinek  <jakub@redhat.com>
	BZ #4586
	* sysdeps/i386/ldbl2mpn.c (__mpn_extract_long_double): Treat
	pseudo-zeros as zero.
	* sysdeps/x86_64/ldbl2mpn.c: New file.
	* sysdeps/ia64/ldbl2mpn.c: New file.

1 files changed, 71 insertions, 9 deletions

diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h
index d3055cbb23..b86d95e93d 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h
@@ -23,6 +23,8 @@
 #include <time.h>
 #include <sys/param.h>
 #include <bits/pthreadtypes.h>
+#include <kernel-features.h>
+#include <tcb-offsets.h>
 
 #ifndef LOCK_INSTR
 # ifdef UP
@@ -42,6 +44,13 @@
 #define FUTEX_PRIVATE_FLAG	128
 
 
+/* Values for 'private' parameter of locking macros.  Yes, the
+   definition seems to be backwards.  But it is not.  The bit will be
+   reversed before passing to the system call.  */
+#define LLL_PRIVATE	0
+#define LLL_SHARED	FUTEX_PRIVATE_FLAG
+
+
 /* Initializer for compatibility lock.  */
 #define LLL_MUTEX_LOCK_INITIALIZER		(0)
 #define LLL_MUTEX_LOCK_INITIALIZER_LOCKED	(1)
@@ -149,44 +158,97 @@ LLL_STUB_UNWIND_INFO_START					\
 LLL_STUB_UNWIND_INFO_END
 
 
-#define lll_futex_wait(futex, val) \
+#define lll_futex_wait(futex, val, private) \
+  lll_futex_timed_wait(futex, val, NULL, private)
+
+
+#define lll_futex_timed_wait(futex, val, timeout, private) \
   ({									      \
+    register const struct timespec *__to __asm ("r10") = timeout;	      \
     int __status;							      \
     register __typeof (val) _val __asm ("edx") = (val);			      \
-    __asm __volatile ("xorq %%r10, %%r10\n\t"				      \
-		      "syscall"						      \
+    __asm __volatile ("syscall"						      \
 		      : "=a" (__status)					      \
 		      : "0" (SYS_futex), "D" (futex), "S" (FUTEX_WAIT),	      \
-			"d" (_val)					      \
-		      : "memory", "cc", "r10", "r11", "cx");		      \
+		        "d" (_val), "r" (__to)				      \
+		      : "memory", "cc", "r11", "cx");			      \
     __status;								      \
   })
 
 
-#define lll_futex_timed_wait(futex, val, timeout)			      \
+#define lll_futex_wake(futex, nr, private) \
+  do {									      \
+    int __ignore;							      \
+    register __typeof (nr) _nr __asm ("edx") = (nr);			      \
+    __asm __volatile ("syscall"						      \
+		      : "=a" (__ignore)					      \
+		      : "0" (SYS_futex), "D" (futex), "S" (FUTEX_WAKE),	      \
+			"d" (_nr)					      \
+		      : "memory", "cc", "r10", "r11", "cx");		      \
+  } while (0)
+
+
+#define lll_private_futex_wait(futex, val) \
+  lll_private_futex_timed_wait (futex, val, NULL)
+
+
+#ifdef __ASSUME_PRIVATE_FUTEX
+# define lll_private_futex_timed_wait(futex, val, timeout) \
   ({									      \
     register const struct timespec *__to __asm ("r10") = timeout;	      \
     int __status;							      \
     register __typeof (val) _val __asm ("edx") = (val);			      \
     __asm __volatile ("syscall"						      \
 		      : "=a" (__status)					      \
-		      : "0" (SYS_futex), "D" (futex), "S" (FUTEX_WAIT),	      \
+		      : "0" (SYS_futex), "D" (futex),			      \
+			"S" (FUTEX_WAIT | FUTEX_PRIVATE_FLAG),		      \
 		        "d" (_val), "r" (__to)				      \
 		      : "memory", "cc", "r11", "cx");			      \
     __status;								      \
   })
 
 
-#define lll_futex_wake(futex, nr) \
+# define lll_private_futex_wake(futex, nr) \
   do {									      \
     int __ignore;							      \
     register __typeof (nr) _nr __asm ("edx") = (nr);			      \
     __asm __volatile ("syscall"						      \
 		      : "=a" (__ignore)					      \
-		      : "0" (SYS_futex), "D" (futex), "S" (FUTEX_WAKE),	      \
+		      : "0" (SYS_futex), "D" (futex),			      \
+			"S" (FUTEX_WAKE | FUTEX_PRIVATE_FLAG),		      \
 			"d" (_nr)					      \
 		      : "memory", "cc", "r10", "r11", "cx");		      \
   } while (0)
+#else
+# define lll_private_futex_timed_wait(futex, val, timeout) \
+  ({									      \
+    register const struct timespec *__to __asm ("r10") = timeout;	      \
+    int __status;							      \
+    int __ignore;							      \
+    register __typeof (val) _val __asm ("edx") = (val);			      \
+    __asm __volatile ("movl %%fs:%P3, %%esi\n\t"			      \
+		      "syscall"						      \
+		      : "=a" (__status), "=S" (__ignore)		      \
+		      : "0" (SYS_futex), "i" (PRIVATE_FUTEX), "D" (futex),    \
+		        "d" (_val), "r" (__to)				      \
+		      : "memory", "cc", "r11", "cx");			      \
+    __status;								      \
+  })
+
+
+# define lll_private_futex_wake(futex, nr) \
+  do {									      \
+    int __ignore;							      \
+    int __ignore2;							      \
+    register __typeof (nr) _nr __asm ("edx") = (nr);			      \
+    __asm __volatile ("orl %%fs:%P3, %%esi\n\t"				      \
+		      "syscall"						      \
+		      : "=a" (__ignore), "=S" (__ignore2)		      \
+		      : "0" (SYS_futex), "i" (PRIVATE_FUTEX), "D" (futex),    \
+			"1" (FUTEX_WAKE), "d" (_nr)			      \
+		      : "memory", "cc", "r10", "r11", "cx");		      \
+  } while (0)
+#endif
 
 
 /* Does not preserve %eax and %ecx.  */