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author | Stefan Roese <sr@denx.de> | 2006-11-10 07:48:47 +0100 |
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committer | Stefan Roese <sr@denx.de> | 2006-11-10 07:48:47 +0100 |
commit | dfc8a9ee0040e53ada125a3c52f241e37f09cf28 (patch) | |
tree | 60fd3973150a4e6b3d9d129d117ecab71b5edabe /include/asm-avr32/div64.h | |
parent | 5c912cb1c31266c66ca59b36f9b6f87296421d75 (diff) | |
parent | 91650b3e4de688038d4f71279c44858e3e2c6870 (diff) | |
download | barebox-dfc8a9ee0040e53ada125a3c52f241e37f09cf28.tar.gz barebox-dfc8a9ee0040e53ada125a3c52f241e37f09cf28.tar.xz |
Merge with /home/stefan/git/u-boot/denx
Diffstat (limited to 'include/asm-avr32/div64.h')
-rw-r--r-- | include/asm-avr32/div64.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/include/asm-avr32/div64.h b/include/asm-avr32/div64.h new file mode 100644 index 0000000000..2e0ba8389e --- /dev/null +++ b/include/asm-avr32/div64.h @@ -0,0 +1,39 @@ +#ifndef _ASM_GENERIC_DIV64_H +#define _ASM_GENERIC_DIV64_H +/* + * Copyright (C) 2003 Bernardo Innocenti <bernie@develer.com> + * Based on former asm-ppc/div64.h and asm-m68knommu/div64.h + * + * The semantics of do_div() are: + * + * uint32_t do_div(uint64_t *n, uint32_t base) + * { + * uint32_t remainder = *n % base; + * *n = *n / base; + * return remainder; + * } + * + * NOTE: macro parameter n is evaluated multiple times, + * beware of side effects! + */ + +#include <linux/types.h> + +extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor); + +/* The unnecessary pointer compare is there + * to check for type safety (n must be 64bit) + */ +# define do_div(n,base) ({ \ + uint32_t __base = (base); \ + uint32_t __rem; \ + (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ + if (((n) >> 32) == 0) { \ + __rem = (uint32_t)(n) % __base; \ + (n) = (uint32_t)(n) / __base; \ + } else \ + __rem = __div64_32(&(n), __base); \ + __rem; \ + }) + +#endif /* _ASM_GENERIC_DIV64_H */ |