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authorWilliam Joye <wjoye@cfa.harvard.edu>2018-12-25 17:45:11 (GMT)
committerWilliam Joye <wjoye@cfa.harvard.edu>2018-12-25 17:45:11 (GMT)
commit5f5fd2864a3193a8d5da12fcb92ba7379084c286 (patch)
treebcdca927ed2a7b05c647b9a6bfdfd4a7ca5c730e /tcl8.6/libtommath/bn_s_mp_mul_digs.c
parent535baffcecf6e738102fc12cda0109bc963e150f (diff)
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update tcl/tk
Diffstat (limited to 'tcl8.6/libtommath/bn_s_mp_mul_digs.c')
-rw-r--r--tcl8.6/libtommath/bn_s_mp_mul_digs.c86
1 files changed, 0 insertions, 86 deletions
diff --git a/tcl8.6/libtommath/bn_s_mp_mul_digs.c b/tcl8.6/libtommath/bn_s_mp_mul_digs.c
deleted file mode 100644
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--- a/tcl8.6/libtommath/bn_s_mp_mul_digs.c
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@@ -1,86 +0,0 @@
-#include <tommath.h>
-#ifdef BN_S_MP_MUL_DIGS_C
-/* LibTomMath, multiple-precision integer library -- Tom St Denis
- *
- * LibTomMath is a library that provides multiple-precision
- * integer arithmetic as well as number theoretic functionality.
- *
- * The library was designed directly after the MPI library by
- * Michael Fromberger but has been written from scratch with
- * additional optimizations in place.
- *
- * The library is free for all purposes without any express
- * guarantee it works.
- *
- * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com
- */
-
-/* multiplies |a| * |b| and only computes upto digs digits of result
- * HAC pp. 595, Algorithm 14.12 Modified so you can control how
- * many digits of output are created.
- */
-int s_mp_mul_digs (mp_int * a, mp_int * b, mp_int * c, int digs)
-{
- mp_int t;
- int res, pa, pb, ix, iy;
- mp_digit u;
- mp_word r;
- mp_digit tmpx, *tmpt, *tmpy;
-
- /* can we use the fast multiplier? */
- if (((digs) < MP_WARRAY) &&
- MIN (a->used, b->used) <
- (1 << ((CHAR_BIT * sizeof (mp_word)) - (2 * DIGIT_BIT)))) {
- return fast_s_mp_mul_digs (a, b, c, digs);
- }
-
- if ((res = mp_init_size (&t, digs)) != MP_OKAY) {
- return res;
- }
- t.used = digs;
-
- /* compute the digits of the product directly */
- pa = a->used;
- for (ix = 0; ix < pa; ix++) {
- /* set the carry to zero */
- u = 0;
-
- /* limit ourselves to making digs digits of output */
- pb = MIN (b->used, digs - ix);
-
- /* setup some aliases */
- /* copy of the digit from a used within the nested loop */
- tmpx = a->dp[ix];
-
- /* an alias for the destination shifted ix places */
- tmpt = t.dp + ix;
-
- /* an alias for the digits of b */
- tmpy = b->dp;
-
- /* compute the columns of the output and propagate the carry */
- for (iy = 0; iy < pb; iy++) {
- /* compute the column as a mp_word */
- r = ((mp_word)*tmpt) +
- ((mp_word)tmpx) * ((mp_word)*tmpy++) +
- ((mp_word) u);
-
- /* the new column is the lower part of the result */
- *tmpt++ = (mp_digit) (r & ((mp_word) MP_MASK));
-
- /* get the carry word from the result */
- u = (mp_digit) (r >> ((mp_word) DIGIT_BIT));
- }
- /* set carry if it is placed below digs */
- if (ix + iy < digs) {
- *tmpt = u;
- }
- }
-
- mp_clamp (&t);
- mp_exch (&t, c);
-
- mp_clear (&t);
- return MP_OKAY;
-}
-#endif