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Use RAX_LP and "or" to operate on return value

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H.J. Lu 2012-05-18 11:05:56 -07:00
parent a88b64b9bb
commit 1b74487e90
3 changed files with 12 additions and 5 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2012-05-18 H.J. Lu <hongjiu.lu@intel.com>
* sysdeps/unix/x86_64/sysdep.S: Use RAX_LP to access return
value. Use "or" to set return value to -1.
* sysdeps/unix/sysv/linux/x86_64/sysdep.S: Use RAX_LP to
negate return value.
2012-05-18 Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
* sysdeps/powerpc/powerpc32/power4/Makefile (CFLAGS-wordcopy.c,

4
sysdeps/unix/sysv/linux/x86_64/sysdep.S
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@ -1,4 +1,4 @@
/* Copyright (C) 2001, 2002 Free Software Foundation, Inc.
/* Copyright (C) 2001-2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -32,7 +32,7 @@
.text
ENTRY (__syscall_error)
negq %rax
neg %RAX_LP
#define __syscall_error __syscall_error_1
#include <sysdeps/unix/x86_64/sysdep.S>

6
sysdeps/unix/x86_64/sysdep.S
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@ -1,4 +1,4 @@
/* Copyright (C) 2001,2002,2004,2005,2011,2012 Free Software Foundation, Inc.
/* Copyright (C) 2001-2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -34,7 +34,7 @@ __syscall_error:
/* We translate the system's EWOULDBLOCK error into EAGAIN.
The GNU C library always defines EWOULDBLOCK==EAGAIN.
EWOULDBLOCK_sys is the original number. */
cmpq $EWOULDBLOCK_sys, %rax /* Is it the old EWOULDBLOCK? */
cmp $EWOULDBLOCK_sys, %RAX_LP /* Is it the old EWOULDBLOCK? */
jne notb /* Branch if not. */
movl $EAGAIN, %eax /* Yes; translate it to EAGAIN. */
notb:
@ -45,7 +45,7 @@ notb:
#else
movl %eax, %fs:C_SYMBOL_NAME(errno@TPOFF)
#endif
movq $-1, %rax
or $-1, %RAX_LP
ret
#undef __syscall_error