diff options
Diffstat (limited to 'libtommath/tommath.h')
| -rw-r--r-- | libtommath/tommath.h | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/libtommath/tommath.h b/libtommath/tommath.h index 31ded829977..3fa7ae89853 100644 --- a/libtommath/tommath.h +++ b/libtommath/tommath.h @@ -20,6 +20,7 @@ #include <linux/slab.h> #include <linux/random.h> #include <linux/ctype.h> +#include <linux/math64.h> #define CHAR_BIT sizeof(uint8_t)*8 @@ -64,16 +65,23 @@ extern "C" { * At the very least a mp_digit must be able to hold 7 bits * [any size beyond that is ok provided it doesn't overflow the data type] */ -#if BITS_PER_LONG <= 32 + +/* FIXME: This can be improved, but requires to use 128bit division + * on 64bit machines, which is not available in kernel now. + */ +#if BITS_PER_LONG < 32 typedef uint16_t mp_digit; typedef uint32_t mp_word; # define DIGIT_BIT 15 -#elif BITS_PER_LONG == 64 - +#elif BITS_PER_LONG <= 64 + typedef uint32_t mp_digit; typedef uint64_t mp_word; + +# define word_div_int(x,y) div_u64((x),(y)) + # define DIGIT_BIT 31 #endif @@ -88,6 +96,11 @@ extern "C" { #endif +#ifndef word_div_int +# define word_div_int(x,y) ((x)/(y)) +#endif + + /* define heap macros */ #ifndef XMALLOC # define XMALLOC(x) kmalloc(x, GFP_KERNEL) |