X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=arch%2Fsh%2Flib%2Fudivsi3.S;fp=arch%2Fsh%2Flib%2Fudivsi3.S;h=53409f1dc0e9093566749993e28fb4cdd2cab7f0;hb=5f91a3adb86475aada63da0975637ab203184e0a;hp=0000000000000000000000000000000000000000;hpb=72cedad2b89aac188e56ac8bc6a4146786791693;p=oweals%2Fu-boot.git

diff --git a/arch/sh/lib/udivsi3.S b/arch/sh/lib/udivsi3.S
new file mode 100644
index 0000000000..53409f1dc0
--- /dev/null
+++ b/arch/sh/lib/udivsi3.S
@@ -0,0 +1,66 @@
+/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+   2004, 2005
+   Free Software Foundation, Inc.
+
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+!! libgcc routines for the Renesas / SuperH SH CPUs.
+!! Contributed by Steve Chamberlain.
+!! sac@cygnus.com
+
+	.balign 4
+	.global	__udivsi3
+	.type	__udivsi3, @function
+div8:
+	div1 r5,r4
+div7:
+	div1 r5,r4; div1 r5,r4; div1 r5,r4
+	div1 r5,r4; div1 r5,r4; div1 r5,r4; rts; div1 r5,r4
+
+divx4:
+	div1 r5,r4; rotcl r0
+	div1 r5,r4; rotcl r0
+	div1 r5,r4; rotcl r0
+	rts; div1 r5,r4
+
+__udivsi3:
+	sts.l pr,@-r15
+	extu.w r5,r0
+	cmp/eq r5,r0
+	bf/s large_divisor
+	div0u
+	swap.w r4,r0
+	shlr16 r4
+	bsr div8
+	shll16 r5
+	bsr div7
+	div1 r5,r4
+	xtrct r4,r0
+	xtrct r0,r4
+	bsr div8
+	swap.w r4,r4
+	bsr div7
+	div1 r5,r4
+	lds.l @r15+,pr
+	xtrct r4,r0
+	swap.w r0,r0
+	rotcl r0
+	rts
+	shlr16 r5
+
+large_divisor:
+	mov #0,r0
+	xtrct r4,r0
+	xtrct r0,r4
+	bsr divx4
+	rotcl r0
+	bsr divx4
+	rotcl r0
+	bsr divx4
+	rotcl r0
+	bsr divx4
+	rotcl r0
+	lds.l @r15+,pr
+	rts
+	rotcl r0