1 /* SPDX-License-Identifier: GPL-2.0-or-later */
7 .file "twofish-x86_64-asm.S"
10 #include <linux/linkage.h>
11 #include <asm/asm-offsets.h>
25 #define k	4128	/* key 1-32 ( word ) */
27 /* define a few register aliases to allow macro substitution */
60  * a input register containing a (rotated 16)
64  * operations on a and b are interleaved to increase performance
66 #define encrypt_round(a,b,c,d,round)\  argument
69 	movzx	a ## B,		%edi;\
71 	movzx	b ## H,		%edi;\
74 	movzx	a ## H,		%edi;\
75 	ror	$16,		a ## D;\
79 	movzx	a ## B,		%edi;\
81 	movzx	b ## H,		%edi;\
84 	movzx	a ## H,		%edi;\
95  * a input register containing a(rotated 16)
99  * operations on a and b are interleaved to increase performance
100  * during the round a and b are prepared for the output whitening
102 #define encrypt_last_round(a,b,c,d,round)\  argument
107 	movzx	a ## B,		%edi;\
109 	movzx	b ## H,		%edi;\
112 	movzx	a ## H,		%edi;\
113 	ror	$16,		a ## D;\
117 	movzx	a ## B,		%edi;\
119 	xor	a,		%r10;\
120 	movzx	b ## H,		%edi;\
122 	movzx	a ## H,		%edi;\
133  * a input register containing a
137  * operations on a and b are interleaved to increase performance
139 #define decrypt_round(a,b,c,d,round)\  argument
140 	movzx	a ## B,		%edi;\
144 	movzx	a ## H,		%edi;\
145 	ror	$16,		a ## D;\
147 	movzx	b ## H,		%edi;\
150 	movzx	a ## B,		%edi;\
154 	movzx	a ## H,		%edi;\
155 	ror	$15,		a ## D;\
157 	movzx	b ## H,		%edi;\
168  * a input register containing a
172  * operations on a and b are interleaved to increase performance
173  * during the round a and b are prepared for the output whitening
175 #define decrypt_last_round(a,b,c,d,round)\  argument
176 	movzx	a ## B,		%edi;\
180 	movzx	b ## H,		%edi;\
183 	movzx	a ## H,		%edi;\
186 	xor	a,		%r10;\
187 	ror	$16,		a ## D;\
191 	movzx	a ## B,		%edi;\
193 	movzx	b ## H,		%edi;\
195 	movzx	a ## H,		%edi;\
211 	/* ctx address is moved to free one non-rex register
264 	/* ctx address is moved to free one non-rex register