diff mbox

Enable unaligned loads on x86-64.

Message ID 20150528084040.GA27945@domone
State RFC, archived
Headers show

Commit Message

Ondrej Bilka May 28, 2015, 8:40 a.m. UTC
Hi, as I mentioned before in header optimization thread its now disabled
on x86-64 but on for x86.

So just enable that by copying generic bits/string.h header there.

OK to commit?

	* sysdeps/x86_64/bits/string.h: New file.

Comments

Richard Henderson May 28, 2015, 4:43 p.m. UTC | #1
On 05/28/2015 01:40 AM, Ondřej Bílka wrote:
> Hi, as I mentioned before in header optimization thread its now disabled
> on x86-64 but on for x86.
> 
> So just enable that by copying generic bits/string.h header there.
> 
> OK to commit?

Um... x86 is the shared directory for x86_64 and i386.
Is the existing header really not being found?


r~
Ondrej Bilka May 28, 2015, 4:55 p.m. UTC | #2
On Thu, May 28, 2015 at 09:43:31AM -0700, Richard Henderson wrote:
> On 05/28/2015 01:40 AM, Ondřej Bílka wrote:
> > Hi, as I mentioned before in header optimization thread its now disabled
> > on x86-64 but on for x86.
> > 
> > So just enable that by copying generic bits/string.h header there.
> > 
> > OK to commit?
> 
> Um... x86 is the shared directory for x86_64 and i386.
> Is the existing header really not being found?
> 
Didn't see it. Now there is problem that provided assembly versions were
optimized for 486 and have terible performance in lines of current
strcmp builtin.
diff mbox

Patch

diff --git a/sysdeps/x86_64/bits/string.h b/sysdeps/x86_64/bits/string.h
new file mode 100644
index 0000000..ec64d63
--- /dev/null
+++ b/sysdeps/x86_64/bits/string.h
@@ -0,0 +1,14 @@ 
+/* This file should provide inline versions of string functions.
+
+   Surround GCC-specific parts with #ifdef __GNUC__, and use `__extern_inline'.
+
+   This file should define __STRING_INLINES if functions are actually defined
+   as inlines.  */
+
+#ifndef _BITS_STRING_H
+#define _BITS_STRING_H	1
+
+/* On x86-64 we can access unaligned multi-byte variables.  */
+#define _STRING_ARCH_unaligned   1
+
+#endif /* bits/string.h */