3 *   Copyright (C) 2006 by Joachim Fritschi, <jfritschi@freenet.de>        *
17 #define ctx       4  /* Twofish context structure */
20 #define b_offset	4
63  * c input register containing c
67 #define encrypt_round(a,b,c,d,round)\  argument
70 	mov	s1(%ebp,%edi,4),d ## D;\
72 	mov	s2(%ebp,%edi,4),%esi;\
75 	xor	s2(%ebp,%edi,4),d ## D;\
78 	xor	s3(%ebp,%edi,4),%esi;\
80 	xor	s3(%ebp,%edi,4),d ## D;\
82 	xor	(%ebp,%edi,4),	%esi;\
85 	xor	(%ebp,%edi,4),	d ## D;\
87 	xor	s1(%ebp,%edi,4),%esi;\
92 	xor	%esi,		c ## D;\
93 	rol	$15,		c ## D;\
94 	add	k+4+round(%ebp),d ## D;\
100  * c input register containing c
105 #define encrypt_last_round(a,b,c,d,round)\  argument
108 	mov	s1(%ebp,%edi,4),d ## D;\
110 	mov	s2(%ebp,%edi,4),%esi;\
113 	xor	s2(%ebp,%edi,4),d ## D;\
116 	xor	s3(%ebp,%edi,4),%esi;\
118 	xor	s3(%ebp,%edi,4),d ## D;\
120 	xor	(%ebp,%edi,4),	%esi;\
123 	xor	(%ebp,%edi,4),	d ## D;\
125 	xor	s1(%ebp,%edi,4),%esi;\
130 	xor	%esi,		c ## D;\
131 	ror	$1,		c ## D;\
132 	add	k+4+round(%ebp),d ## D;\
138  * c input register containing c
142 #define decrypt_round(a,b,c,d,round)\  argument
143 	push	c ## D;\
145 	mov	(%ebp,%edi,4),	c ## D;\
147 	mov	s3(%ebp,%edi,4),%esi;\
150 	xor	s1(%ebp,%edi,4),c ## D;\
153 	xor	(%ebp,%edi,4),	%esi;\
155 	xor	s2(%ebp,%edi,4),c ## D;\
157 	xor	s1(%ebp,%edi,4),%esi;\
160 	xor	s3(%ebp,%edi,4),c ## D;\
162 	xor	s2(%ebp,%edi,4),%esi;\
164 	add	%esi,		c ## D;\
165 	add	c ## D,		%esi;\
166 	add	k+round(%ebp),	c ## D;\
167 	xor	%edi,		c ## D;\
168 	add	k+4+round(%ebp),%esi;\
175  * c input register containing c
180 #define decrypt_last_round(a,b,c,d,round)\  argument
181 	push	c ## D;\
183 	mov	(%ebp,%edi,4),	c ## D;\
185 	mov	s3(%ebp,%edi,4),%esi;\
188 	xor	s1(%ebp,%edi,4),c ## D;\
191 	xor	(%ebp,%edi,4),	%esi;\
193 	xor	s2(%ebp,%edi,4),c ## D;\
195 	xor	s1(%ebp,%edi,4),%esi;\
198 	xor	s3(%ebp,%edi,4),c ## D;\
200 	xor	s2(%ebp,%edi,4),%esi;\
202 	add	%esi,		c ## D;\
203 	add	c ## D,		%esi;\
204 	add	k+round(%ebp),	c ## D;\
205 	xor	%edi,		c ## D;\
206 	add	k+4+round(%ebp),%esi;\
235 	encrypt_round(R0,R1,R2,R3,4*8);
299 	decrypt_round(R2,R3,R0,R1,4*8);