diff options
author | Martin Storsjö <martin@martin.st> | 2013-03-23 23:21:09 +0200 |
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committer | Niels Möller <nisse@lysator.liu.se> | 2013-04-04 11:24:13 +0200 |
commit | 388596308e08b41ff26535b0aaf35b0553da708b (patch) | |
tree | 65778c33a790e6570a388fdc82968bb109b15cf5 | |
parent | 0d039117d988ac5132c86f5fff3206a44db6f98f (diff) | |
download | nettle-388596308e08b41ff26535b0aaf35b0553da708b.tar.gz |
Add fallback functions for mpn_copyd, mpn_copyi and mpn_zero.
-rw-r--r-- | ChangeLog | 4 | ||||
-rw-r--r-- | gmp-glue.c | 26 | ||||
-rw-r--r-- | gmp-glue.h | 26 |
3 files changed, 56 insertions, 0 deletions
@@ -1,5 +1,9 @@ 2013-04-04 Niels Möller <nisse@lysator.liu.se> + From Martin Storsjö. Fallback functions for older GMP releases. + * gmp-glue.c (mpn_copyd, mpn_copyi, mpn_zero): New functions. + * gmp-glue.h: Declare them. + * gmp-glue.h (cnd_add_n, cnd_sub_n): Moved here, define in terms of mpn_cnd_add_n and mpn_sub_n if available, otherwise in terms of mpn_addmul_1 and mpn_submul_1. This seems to be an improvement for @@ -106,6 +106,32 @@ mpz_roinit_n (mpz_ptr x, const mp_limb_t *xp, mp_size_t xs) } #endif /* !GMP_HAVE_mpz_limbs_read */ +#if !GMP_HAVE_mpn_copyd +void +mpn_copyd (mp_ptr dst, mp_srcptr src, mp_size_t n) +{ + mp_size_t i; + for (i = n - 1; i >= 0; i--) + dst[i] = src[i]; +} + +void +mpn_copyi (mp_ptr dst, mp_srcptr src, mp_size_t n) +{ + mp_size_t i; + for (i = 0; i < n; i++) + dst[i] = src[i]; +} + +void +mpn_zero (mp_ptr ptr, mp_size_t n) +{ + mp_size_t i; + for (i = 0; i < n; i++) + ptr[i] = 0; +} +#endif /* !GMP_HAVE_mpn_copyd */ + /* Additional convenience functions. */ int @@ -33,6 +33,12 @@ #define GMP_HAVE_mpz_limbs_read 0 #endif +#ifdef mpn_copyd +#define GMP_HAVE_mpn_copyd 1 +#else +#define GMP_HAVE_mpn_copyd 0 +#endif + /* Name mangling. */ #if !GMP_HAVE_mpz_limbs_read #define mpz_limbs_read _nettle_mpz_limbs_read @@ -42,6 +48,12 @@ #define mpz_roinit_n _nettle_mpz_roinit_n #endif +#if !GMP_HAVE_mpn_copyd +#define mpn_copyd _nettle_mpn_copyd +#define mpn_copyi _nettle_mpn_copyi +#define mpn_zero _nettle_mpn_zero +#endif + #define mpz_limbs_cmp _nettle_mpz_limbs_cmp #define mpz_limbs_read_n _nettle_mpz_limbs_read_n #define mpz_limbs_copy _nettle_mpz_limbs_copy @@ -92,6 +104,20 @@ mpz_roinit_n (mpz_ptr x, const mp_limb_t *xp, mp_size_t xs); #endif /* !GMP_HAVE_mpz_limbs_read */ +#if !GMP_HAVE_mpn_copyd +/* Copy elements, backwards */ +void +mpn_copyd (mp_ptr dst, mp_srcptr src, mp_size_t n); + +/* Copy elements, forwards */ +void +mpn_copyi (mp_ptr dst, mp_srcptr src, mp_size_t n); + +/* Zero elements */ +void +mpn_zero (mp_ptr ptr, mp_size_t n); +#endif /* !GMP_HAVE_mpn_copyd */ + /* Convenience functions */ int mpz_limbs_cmp (mpz_srcptr a, const mp_limb_t *bp, mp_size_t bn); |