X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-s390%2Fdiv64.h;fp=include%2Fasm-s390%2Fdiv64.h;h=af098dc3cf59b614aedb59f80fb85d83d46e8217;hb=64ba3f394c830ec48a1c31b53dcae312c56f1604;hp=6cd978cefb2850be383e462f77a05c23ff7adc33;hpb=be1e6109ac94a859551f8e1774eb9a8469fe055c;p=linux-2.6.git

diff --git a/include/asm-s390/div64.h b/include/asm-s390/div64.h
index 6cd978cef..af098dc3c 100644
--- a/include/asm-s390/div64.h
+++ b/include/asm-s390/div64.h
@@ -1 +1,49 @@
+#ifndef __S390_DIV64
+#define __S390_DIV64
+
+#ifndef __s390x__
+
+/* for do_div "base" needs to be smaller than 2^31-1 */
+#define do_div(n, base) ({                                      \
+	unsigned long long __n = (n);				\
+	unsigned long __r;					\
+								\
+	asm ("   slr  0,0\n"					\
+	     "   l    1,%1\n"					\
+	     "   srdl 0,1\n"					\
+	     "   dr   0,%2\n"					\
+	     "   alr  1,1\n"					\
+	     "   alr  0,0\n"					\
+	     "   lhi  2,1\n"					\
+	     "   n    2,%1\n"					\
+	     "   alr  0,2\n"					\
+	     "   clr  0,%2\n"					\
+	     "   jl   0f\n"					\
+	     "   slr  0,%2\n"					\
+             "   ahi  1,1\n"					\
+	     "0: st   1,%1\n"					\
+	     "   l    1,4+%1\n"					\
+	     "   srdl 0,1\n"					\
+             "   dr   0,%2\n"					\
+	     "   alr  1,1\n"					\
+	     "   alr  0,0\n"					\
+	     "   lhi  2,1\n"					\
+	     "   n    2,4+%1\n"					\
+	     "   alr  0,2\n"					\
+	     "   clr  0,%2\n"					\
+             "   jl   1f\n"					\
+	     "   slr  0,%2\n"					\
+	     "   ahi  1,1\n"					\
+	     "1: st   1,4+%1\n"					\
+             "   lr   %0,0"					\
+	     : "=d" (__r), "=m" (__n)				\
+	     : "d" (base), "m" (__n) : "0", "1", "2", "cc" );	\
+	(n) = (__n);						\
+        __r;                                                    \
+})
+
+#else /* __s390x__ */
 #include <asm-generic/div64.h>
+#endif /* __s390x__ */
+
+#endif