Date: Sat, 16 Oct 2004 10:49:25 -0700 From: "David O'Brien" <obrien@freebsd.org> To: freebsd-current@freebsd.org Subject: [PATCH] optimizing X now that we don't support i386 CPU's on 6-CURRENT Message-ID: <20041016174925.GA96809@dragon.nuxi.com>
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Now that we don't support running 6-CURRENT on i386 class machines (vs.
486 and newer), I'd like to commit this minor optimization. Issues?
Concerns?
Index: htonl.S
===================================================================
RCS file: /home/ncvs/src/lib/libc/i386/net/htonl.S,v
retrieving revision 1.9
diff -u -r1.9 htonl.S
--- htonl.S 23 Mar 2002 02:06:08 -0000 1.9
+++ htonl.S 16 Oct 2004 17:40:31 -0000
@@ -46,7 +46,11 @@
.set CNAME(htonl),CNAME(__htonl)
ENTRY(__htonl)
movl 4(%esp),%eax
+#ifdef I386_CPU
xchgb %al,%ah
roll $16,%eax
xchgb %al,%ah
+#else
+ bswap %eax
+#endif
ret
Index: ntohl.S
===================================================================
RCS file: /home/ncvs/src/lib/libc/i386/net/ntohl.S,v
retrieving revision 1.9
diff -u -r1.9 ntohl.S
--- ntohl.S 23 Mar 2002 02:06:08 -0000 1.9
+++ ntohl.S 16 Oct 2004 17:38:24 -0000
@@ -46,7 +46,11 @@
.set CNAME(ntohl),CNAME(__ntohl)
ENTRY(__ntohl)
movl 4(%esp),%eax
+#ifdef I386_CPU
xchgb %al,%ah
roll $16,%eax
xchgb %al,%ah
+#else
+ bswap %eax
+#endif
ret
--
-- David (obrien@FreeBSD.org)
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