From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
---
 arch/sparc64/lib/strlen.S | 80 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 arch/sparc64/lib/strlen.S

(limited to 'arch/sparc64/lib/strlen.S')

diff --git a/arch/sparc64/lib/strlen.S b/arch/sparc64/lib/strlen.S
new file mode 100644
index 000000000000..e9ba1920d818
--- /dev/null
+++ b/arch/sparc64/lib/strlen.S
@@ -0,0 +1,80 @@
+/* strlen.S: Sparc64 optimized strlen code
+ * Hand optimized from GNU libc's strlen
+ * Copyright (C) 1991,1996 Free Software Foundation
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1996, 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ */
+
+#define LO_MAGIC 0x01010101
+#define HI_MAGIC 0x80808080
+
+	.align	32
+	.globl	strlen
+	.type	strlen,#function
+strlen:
+	mov	%o0, %o1
+	andcc	%o0, 3, %g0
+	be,pt	%icc, 9f
+	 sethi	%hi(HI_MAGIC), %o4
+	ldub	[%o0], %o5
+	brz,pn	%o5, 11f
+	 add	%o0, 1, %o0
+	andcc	%o0, 3, %g0
+	be,pn	%icc, 4f
+	 or	%o4, %lo(HI_MAGIC), %o3
+	ldub	[%o0], %o5
+	brz,pn	%o5, 12f
+	 add	%o0, 1, %o0
+	andcc	%o0, 3, %g0
+	be,pt	%icc, 5f
+	 sethi	%hi(LO_MAGIC), %o4
+	ldub	[%o0], %o5
+	brz,pn	%o5, 13f
+	 add	%o0, 1, %o0
+	ba,pt	%icc, 8f
+	 or	%o4, %lo(LO_MAGIC), %o2
+9:
+	or	%o4, %lo(HI_MAGIC), %o3
+4:
+	sethi	%hi(LO_MAGIC), %o4
+5:
+	or	%o4, %lo(LO_MAGIC), %o2
+8:
+	ld	[%o0], %o5
+2:
+	sub	%o5, %o2, %o4
+	andcc	%o4, %o3, %g0
+	be,pt	%icc, 8b
+	 add	%o0, 4, %o0
+
+	/* Check every byte. */
+	srl	%o5, 24, %g7
+	andcc	%g7, 0xff, %g0
+	be,pn	%icc, 1f
+	 add	%o0, -4, %o4
+	srl	%o5, 16, %g7
+	andcc	%g7, 0xff, %g0
+	be,pn	%icc, 1f
+	 add	%o4, 1, %o4
+	srl	%o5, 8, %g7
+	andcc	%g7, 0xff, %g0
+	be,pn	%icc, 1f
+	 add	%o4, 1, %o4
+	andcc	%o5, 0xff, %g0
+	bne,a,pt %icc, 2b
+	 ld	[%o0], %o5
+	add	%o4, 1, %o4
+1:
+	retl
+	 sub	%o4, %o1, %o0
+11:
+	retl
+	 mov	0, %o0
+12:
+	retl
+	 mov	1, %o0
+13:
+	retl
+	 mov	2, %o0
+
+	.size	strlen, .-strlen
-- 
cgit v1.2.3