diff options
Diffstat (limited to 'third_party/heimdal/lib/hcrypto/libtommath/bn_mp_dr_setup.c')
| -rw-r--r-- | third_party/heimdal/lib/hcrypto/libtommath/bn_mp_dr_setup.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_dr_setup.c b/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_dr_setup.c new file mode 100644 index 0000000..32d5f38 --- /dev/null +++ b/third_party/heimdal/lib/hcrypto/libtommath/bn_mp_dr_setup.c @@ -0,0 +1,15 @@ +#include "tommath_private.h" +#ifdef BN_MP_DR_SETUP_C +/* LibTomMath, multiple-precision integer library -- Tom St Denis */ +/* SPDX-License-Identifier: Unlicense */ + +/* determines the setup value */ +void mp_dr_setup(const mp_int *a, mp_digit *d) +{ + /* the casts are required if MP_DIGIT_BIT is one less than + * the number of bits in a mp_digit [e.g. MP_DIGIT_BIT==31] + */ + *d = (mp_digit)(((mp_word)1 << (mp_word)MP_DIGIT_BIT) - (mp_word)a->dp[0]); +} + +#endif |