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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-m32r/div64.h
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz
Linux-2.6.12-rc2v2.6.12-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!
Diffstat (limited to 'include/asm-m32r/div64.h')
-rw-r--r--include/asm-m32r/div64.h38
1 files changed, 38 insertions, 0 deletions
diff --git a/include/asm-m32r/div64.h b/include/asm-m32r/div64.h
new file mode 100644
index 000000000000..417a51bd552d
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+++ b/include/asm-m32r/div64.h
@@ -0,0 +1,38 @@
+#ifndef _ASM_M32R_DIV64
+#define _ASM_M32R_DIV64
+
+/* $Id$ */
+
+/* unsigned long long division.
+ * Input:
+ * unsigned long long n
+ * unsigned long base
+ * Output:
+ * n = n / base;
+ * return value = n % base;
+ */
+#define do_div(n, base) \
+({ \
+ unsigned long _res, _high, _mid, _low; \
+ \
+ _low = (n) & 0xffffffffUL; \
+ _high = (n) >> 32; \
+ if (_high) { \
+ _mid = (_high % (unsigned long)(base)) << 16; \
+ _high = _high / (unsigned long)(base); \
+ _mid += _low >> 16; \
+ _low &= 0x0000ffffUL; \
+ _low += (_mid % (unsigned long)(base)) << 16; \
+ _mid = _mid / (unsigned long)(base); \
+ _res = _low % (unsigned long)(base); \
+ _low = _low / (unsigned long)(base); \
+ n = _low + ((long long)_mid << 16) + \
+ ((long long)_high << 32); \
+ } else { \
+ _res = _low % (unsigned long)(base); \
+ n = (_low / (unsigned long)(base)); \
+ } \
+ _res; \
+})
+
+#endif /* _ASM_M32R_DIV64 */