diff options
Diffstat (limited to 'lib/crypto/mpi/mpi-add.c')
| -rw-r--r-- | lib/crypto/mpi/mpi-add.c | 51 |
1 files changed, 0 insertions, 51 deletions
diff --git a/lib/crypto/mpi/mpi-add.c b/lib/crypto/mpi/mpi-add.c index 9056fc5167fc..b47c8c35f5fe 100644 --- a/lib/crypto/mpi/mpi-add.c +++ b/lib/crypto/mpi/mpi-add.c @@ -13,57 +13,6 @@ #include "mpi-internal.h" -/**************** - * Add the unsigned integer V to the mpi-integer U and store the - * result in W. U and V may be the same. - */ -void mpi_add_ui(MPI w, MPI u, unsigned long v) -{ - mpi_ptr_t wp, up; - mpi_size_t usize, wsize; - int usign, wsign; - - usize = u->nlimbs; - usign = u->sign; - wsign = 0; - - /* If not space for W (and possible carry), increase space. */ - wsize = usize + 1; - if (w->alloced < wsize) - mpi_resize(w, wsize); - - /* These must be after realloc (U may be the same as W). */ - up = u->d; - wp = w->d; - - if (!usize) { /* simple */ - wp[0] = v; - wsize = v ? 1:0; - } else if (!usign) { /* mpi is not negative */ - mpi_limb_t cy; - cy = mpihelp_add_1(wp, up, usize, v); - wp[usize] = cy; - wsize = usize + cy; - } else { - /* The signs are different. Need exact comparison to determine - * which operand to subtract from which. - */ - if (usize == 1 && up[0] < v) { - wp[0] = v - up[0]; - wsize = 1; - } else { - mpihelp_sub_1(wp, up, usize, v); - /* Size can decrease with at most one limb. */ - wsize = usize - (wp[usize-1] == 0); - wsign = 1; - } - } - - w->nlimbs = wsize; - w->sign = wsign; -} - - void mpi_add(MPI w, MPI u, MPI v) { mpi_ptr_t wp, up, vp; |