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|
|
| UFC-crypt: ultra fast crypt(3) implementation
| Copyright (C) 1991, 1992, Michael Glad, email: glad@daimi.aau.dk
|
| This library is free software, you can redistribute it and/or
| modify it under the terms of the GNU Library General Public
| License as published by the Free Software Foundation, either
| version 2 of the License, or (at your option) any later version.
|
| This library is distributed in the hope that it will be useful,
| but WITHOUT ANY WARRANTY, without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
| Library General Public License for more details.
|
| You should have received a copy of the GNU Library General Public
| License along with this library, if not, write to the Free
| Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
| @(#)crypt.sun3.S 2.8 01/11/92
|
| Assembly code for SUN3 68000 based workstations.
|
#define L1 d0
#define L2 d1
#define R1 d2
#define R2 d3
#define ITR d4
#define SCR1 d5
#define SCR2 d6
#define I d7
#define SB0 a0
#define SB1 a1
#define SB2 a2
#define SB3 a3
#define KPTR a4
#define F(I,O1,O2,SBX,SBY) \
movl KPTR@+,SCR1 ; eorl I,SCR1 ; \
movl SBX@(0,SCR1:w),SCR2 ; eorl SCR2,O1 ; \
movl SBX@(4,SCR1:w),SCR2 ; eorl SCR2,O2 ; \
swap SCR1 ; \
movl SBY@(0,SCR1:w),SCR2 ; eorl SCR2,O1 ; \
movl SBY@(4,SCR1:w),SCR2 ; eorl SCR2,O2 ;
#define G(I1,I2,O1,O2) \
F(I1,O1,O2,SB1,SB0) F(I2,O1,O2,SB3,SB2)
#define H G(R1,R2,L1,L2) ; G(L1,L2,R1,R2)
.text
.proc
.globl _ufc_doit
_ufc_doit:
|
| Preamble
|
moveml d2-d7/a2-a4,sp@-
moveml sp@(40),L1/L2/R1/R2/ITR
|
| Setup address registers with sb pointers
|
movl #_ufc_sb0,SB0 ; movl #_ufc_sb1,SB1
movl #_ufc_sb2,SB2 ; movl #_ufc_sb3,SB3
|
| And loop...
|
Lagain:
movl #_ufc_keytab,KPTR
moveq #7,I
Lagain1:
H
dbra I,Lagain1
| Permute
exg L1,R1
exg L2,R2
|
subql #1,ITR
jne Lagain
|
| Output conversion
|
moveml L1/L2/R1/R2,sp@-
jbsr _ufc_dofinalperm ; addl #16,sp
|
| Postamble
|
moveml sp@+,d2-d7/a2-a4
rts
|
