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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/udiv_qrnnd.S
parent32df39c741788e8637cffe6633d73594b26d70fb (diff)
parent7ae8350f67eea861280a4cbd2d067777a0e87153 (diff)
Merge branch 'master' of git://git.denx.de/u-boot
Diffstat (limited to 'arch/sh/lib/udiv_qrnnd.S')
-rw-r--r--arch/sh/lib/udiv_qrnnd.S60
1 files changed, 60 insertions, 0 deletions
diff --git a/arch/sh/lib/udiv_qrnnd.S b/arch/sh/lib/udiv_qrnnd.S
new file mode 100644
index 0000000000..4557a15665
--- /dev/null
+++ b/arch/sh/lib/udiv_qrnnd.S
@@ -0,0 +1,60 @@
+/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+ 2004, 2005, 2006
+ 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
+
+!! ashiftrt_r4_x, ___ashrsi3, ___ashlsi3, ___lshrsi3 routines
+!! recoded in assembly by Toshiyasu Morita
+!! tm@netcom.com
+
+/* SH2 optimizations for ___ashrsi3, ___ashlsi3, ___lshrsi3 and
+ ELF local label prefixes by J"orn Rennecke
+ amylaar@cygnus.com */
+
+ /* r0: rn r1: qn */ /* r0: n1 r4: n0 r5: d r6: d1 */ /* r2: __m */
+ /* n1 < d, but n1 might be larger than d1. */
+ .global __udiv_qrnnd_16
+ .balign 8
+__udiv_qrnnd_16:
+ div0u
+ cmp/hi r6,r0
+ bt .Lots
+ .rept 16
+ div1 r6,r0
+ .endr
+ extu.w r0,r1
+ bt 0f
+ add r6,r0
+0: rotcl r1
+ mulu.w r1,r5
+ xtrct r4,r0
+ swap.w r0,r0
+ sts macl,r2
+ cmp/hs r2,r0
+ sub r2,r0
+ bt 0f
+ addc r5,r0
+ add #-1,r1
+ bt 0f
+1: add #-1,r1
+ rts
+ add r5,r0
+ .balign 8
+.Lots:
+ sub r5,r0
+ swap.w r4,r1
+ xtrct r0,r1
+ clrt
+ mov r1,r0
+ addc r5,r0
+ mov #-1,r1
+ bf/s 1b
+ shlr16 r1
+0: rts
+ nop