diff options
| author | David Howells <dhowells@redhat.com> | 2012-09-13 13:09:33 +0100 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2012-10-08 13:50:11 +1030 |
| commit | aacf29bf1bf133f6219e6f8969d4ebc2ac76458f (patch) | |
| tree | b4379ab6617d1e963020365e03cda0b551bc3237 /lib/mpi/mpi-pow.c | |
| parent | cf7f601c067994f371ba77721d1e45fce61a4569 (diff) | |
MPILIB: Provide count_leading/trailing_zeros() based on arch functions
Provide count_leading/trailing_zeros() macros based on extant arch bit scanning
functions rather than reimplementing from scratch in MPILIB.
Whilst we're at it, turn count_foo_zeros(n, x) into n = count_foo_zeros(x).
Also move the definition to asm-generic as other people may be interested in
using it.
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Cc: Arnd Bergmann <arnd@arndb.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'lib/mpi/mpi-pow.c')
| -rw-r--r-- | lib/mpi/mpi-pow.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/mpi/mpi-pow.c b/lib/mpi/mpi-pow.c index 67f3e79af91..5464c8744ea 100644 --- a/lib/mpi/mpi-pow.c +++ b/lib/mpi/mpi-pow.c @@ -77,7 +77,7 @@ int mpi_powm(MPI res, MPI base, MPI exp, MPI mod) mp = mp_marker = mpi_alloc_limb_space(msize); if (!mp) goto enomem; - count_leading_zeros(mod_shift_cnt, mod->d[msize - 1]); + mod_shift_cnt = count_leading_zeros(mod->d[msize - 1]); if (mod_shift_cnt) mpihelp_lshift(mp, mod->d, msize, mod_shift_cnt); else @@ -169,7 +169,7 @@ int mpi_powm(MPI res, MPI base, MPI exp, MPI mod) i = esize - 1; e = ep[i]; - count_leading_zeros(c, e); + c = count_leading_zeros(e); e = (e << c) << 1; /* shift the exp bits to the left, lose msb */ c = BITS_PER_MPI_LIMB - 1 - c; |