Use "neg %eax" in i386 SYSCALL_ERROR_HANDLER

diff --git a/ChangeLog b/ChangeLog
index ee29e04166d24d0bfb5e86d52619e267f9bed434..1918d8bf0f530d5fb5906e38c61fe79f3807dd7a 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2012-05-22  H.J. Lu  <hongjiu.lu@intel.com>
 
+       * sysdeps/unix/sysv/linux/i386/sysdep.h (SYSCALL_ERROR_HANDLER):
+       Use "neg %eax".
+
        * time/mktime.c: Update copyright years.
 
 2012-05-22  Paul Eggert  <eggert@cs.ucla.edu>

diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h
index e7d7103b9616d9a7d547a73ed559b2a6e907ac42..6c4f778914bf7bd2851568878ed97678fc188994 100644 (file)
--- a/sysdeps/unix/sysv/linux/i386/sysdep.h
+++ b/sysdeps/unix/sysv/linux/i386/sysdep.h
@@ -112,9 +112,8 @@
 #  define SYSCALL_ERROR_HANDLER                                                      \
 0:SETUP_PIC_REG(cx);                                                         \
   addl $_GLOBAL_OFFSET_TABLE_, %ecx;                                         \
-  xorl %edx, %edx;                                                           \
-  subl %eax, %edx;                                                           \
-  movl %edx, rtld_errno@GOTOFF(%ecx);                                        \
+  negl %eax;                                                                 \
+  movl %eax, rtld_errno@GOTOFF(%ecx);                                        \
   orl $-1, %eax;                                                             \
   jmp L(pseudo_end);
 
@@ -129,9 +128,8 @@
 0:SETUP_PIC_REG (cx);                                                        \
   addl $_GLOBAL_OFFSET_TABLE_, %ecx;                                         \
   movl SYSCALL_ERROR_ERRNO@GOTNTPOFF(%ecx), %ecx;                            \
-  xorl %edx, %edx;                                                           \
-  subl %eax, %edx;                                                           \
-  SYSCALL_ERROR_HANDLER_TLS_STORE (%edx, %ecx);                                      \
+  negl %eax;                                                                 \
+  SYSCALL_ERROR_HANDLER_TLS_STORE (%eax, %ecx);                                      \
   orl $-1, %eax;                                                             \
   jmp L(pseudo_end);
 #  ifndef NO_TLS_DIRECT_SEG_REFS
@@ -147,10 +145,9 @@
 #  define SYSCALL_ERROR_HANDLER                                                      \
 0:SETUP_PIC_REG(cx);                                                         \
   addl $_GLOBAL_OFFSET_TABLE_, %ecx;                                         \
-  xorl %edx, %edx;                                                           \
-  subl %eax, %edx;                                                           \
+  negl %eax;                                                                 \
   movl errno@GOT(%ecx), %ecx;                                                \
-  movl %edx, (%ecx);                                                         \
+  movl %eax, (%ecx);                                                         \
   orl $-1, %eax;                                                             \
   jmp L(pseudo_end);
 # endif        /* _LIBC_REENTRANT */