diff options
Diffstat (limited to 'miasm2/jitter/bn.c')
| -rw-r--r-- | miasm2/jitter/bn.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/miasm2/jitter/bn.c b/miasm2/jitter/bn.c index c621d102..dd4f34ef 100644 --- a/miasm2/jitter/bn.c +++ b/miasm2/jitter/bn.c @@ -579,6 +579,92 @@ int bignum_cmp(bn_t a, bn_t b) } +/* Signed compare bn */ +int bignum_cmp_signed(bn_t a, bn_t b) +{ + int i = BN_ARRAY_SIZE; + do { + i -= 1; /* Decrement first, to start with last array element */ + if ((DTYPE_SIGNED)a.array[i] > (DTYPE_SIGNED)b.array[i]) { + return LARGER; + } + else if ((DTYPE_SIGNED)a.array[i] < (DTYPE_SIGNED)b.array[i]) { + return SMALLER; + } + } + while (i != 0); + + return EQUAL; +} + + +/* Unsigned compare bn */ +int bignum_cmp_unsigned(bn_t a, bn_t b) +{ + return bignum_cmp(a, b); +} + + +/* Return 1 if a == b else 0 */ +int bignum_is_equal(bn_t a, bn_t b) +{ + int ret; + ret = bignum_cmp_unsigned(a, b); + if (ret == EQUAL) + return 1; + else + return 0; +} + + +/* Return 1 if a <u b else 0 */ +int bignum_is_inf_unsigned(bn_t a, bn_t b) +{ + int ret; + ret = bignum_cmp_unsigned(a, b); + if (ret == SMALLER) + return 1; + else + return 0; +} + + +/* Return 1 if a <=u b else 0 */ +int bignum_is_inf_equal_unsigned(bn_t a, bn_t b) +{ + int ret; + ret = bignum_cmp_unsigned(a, b); + if (ret == EQUAL || ret == SMALLER) + return 1; + else + return 0; +} + + +/* Return 1 if a <s b else 0 */ +int bignum_is_inf_signed(bn_t a, bn_t b) +{ + int ret; + ret = bignum_cmp_signed(a, b); + if (ret == SMALLER) + return 1; + else + return 0; +} + + +/* Return 1 if a <=s b else 0 */ +int bignum_is_inf_equal_signed(bn_t a, bn_t b) +{ + int ret; + ret = bignum_cmp_signed(a, b); + if (ret == EQUAL || ret == SMALLER) + return 1; + else + return 0; +} + + int bignum_is_zero(bn_t n) { //require(n, "n is null"); |