From 0e44a77e481e18b56ef5bd2354fc97a267487551 Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Tue, 22 May 2012 05:34:36 -0700
Subject: Use "neg %eax" in x86_64 SYSCALL_SET_ERRNO

---
 sysdeps/unix/sysv/linux/x86_64/sysdep.h | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

(limited to 'sysdeps/unix/sysv')

diff --git a/sysdeps/unix/sysv/linux/x86_64/sysdep.h b/sysdeps/unix/sysv/linux/x86_64/sysdep.h
index 3f5bdd2ac3..396345e8b7 100644
--- a/sysdeps/unix/sysv/linux/x86_64/sysdep.h
+++ b/sysdeps/unix/sysv/linux/x86_64/sysdep.h
@@ -115,9 +115,8 @@
 # if defined PIC && defined RTLD_PRIVATE_ERRNO
 #  define SYSCALL_SET_ERRNO			\
   lea rtld_errno(%rip), %RCX_LP;		\
-  xorl %edx, %edx;				\
-  sub %RAX_LP, %RDX_LP;				\
-  movl %edx, (%rcx)
+  neg %eax;					\
+  movl %eax, (%rcx)
 # else
 #  ifndef NOT_IN_libc
 #   define SYSCALL_ERROR_ERRNO __libc_errno
@@ -126,9 +125,8 @@
 #  endif
 #  define SYSCALL_SET_ERRNO			\
   movq SYSCALL_ERROR_ERRNO@GOTTPOFF(%rip), %rcx;\
-  xorl %edx, %edx;				\
-  sub %RAX_LP, %RDX_LP;				\
-  movl %edx, %fs:(%rcx)
+  neg %eax;					\
+  movl %eax, %fs:(%rcx);
 # endif
 
 # ifndef PIC
-- 
cgit v1.2.3