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authorStefano Babic <sbabic@denx.de>2015-03-05 16:05:10 +0100
committerStefano Babic <sbabic@denx.de>2015-03-05 16:05:10 +0100
commit9b5b60a05cb8bba2d135439419b2030764e359bd (patch)
tree15e249ac39e9c547668327218e63a0faf54a3283 /arch/sh/lib/udivsi3.S
parent32df39c741788e8637cffe6633d73594b26d70fb (diff)
parent7ae8350f67eea861280a4cbd2d067777a0e87153 (diff)
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Merge branch 'master' of git://git.denx.de/u-boot
Diffstat (limited to 'arch/sh/lib/udivsi3.S')
-rw-r--r--arch/sh/lib/udivsi3.S66
1 files changed, 66 insertions, 0 deletions
diff --git a/arch/sh/lib/udivsi3.S b/arch/sh/lib/udivsi3.S
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+/* 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