Mercurial > dropbear
annotate tomsfastmath/src/bin/fp_reverse.c @ 643:a362b62d38b2 dropbear-tfm
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
with Makefile.in renamed
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Wed, 23 Nov 2011 18:10:20 +0700 |
parents | |
children |
rev | line source |
---|---|
643
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1 /* TomsFastMath, a fast ISO C bignum library. |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
2 * |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
3 * This project is meant to fill in where LibTomMath |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
4 * falls short. That is speed ;-) |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
5 * |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
6 * This project is public domain and free for all purposes. |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
7 * |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
8 * Tom St Denis, [email protected] |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
9 */ |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
10 #include <tfm.h> |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
11 |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
12 /* reverse an array, used for radix code */ |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
13 void fp_reverse (unsigned char *s, int len) |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
14 { |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
15 int ix, iy; |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
16 unsigned char t; |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
17 |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
18 ix = 0; |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
19 iy = len - 1; |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
20 while (ix < iy) { |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
21 t = s[ix]; |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
22 s[ix] = s[iy]; |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
23 s[iy] = t; |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
24 ++ix; |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
25 --iy; |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
26 } |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
27 } |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
28 |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
29 /* $Source$ */ |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
30 /* $Revision$ */ |
a362b62d38b2
Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
31 /* $Date$ */ |