1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _SELFTESTS_POWERPC_INSTRUCTIONS_H
3 #define _SELFTESTS_POWERPC_INSTRUCTIONS_H
4 
5 #include <stdio.h>
6 #include <stdlib.h>
7 
8 /* This defines the "copy" instruction from Power ISA 3.0 Book II, section 4.4. */
9 #define __COPY(RA, RB, L) \
10 	(0x7c00060c | (RA) << (31-15) | (RB) << (31-20) | (L) << (31-10))
11 #define COPY(RA, RB, L) \
12 	.long __COPY((RA), (RB), (L))
13 
14 static inline void copy(void *i)
15 {
16 	asm volatile(str(COPY(0, %0, 0))";"
17 			:
18 			: "b" (i)
19 			: "memory"
20 		    );
21 }
22 
23 static inline void copy_first(void *i)
24 {
25 	asm volatile(str(COPY(0, %0, 1))";"
26 			:
27 			: "b" (i)
28 			: "memory"
29 		    );
30 }
31 
32 /* This defines the "paste" instruction from Power ISA 3.0 Book II, section 4.4. */
33 #define __PASTE(RA, RB, L, RC) \
34 	(0x7c00070c | (RA) << (31-15) | (RB) << (31-20) | (L) << (31-10) | (RC) << (31-31))
35 #define PASTE(RA, RB, L, RC) \
36 	.long __PASTE((RA), (RB), (L), (RC))
37 
38 static inline int paste(void *i)
39 {
40 	int cr;
41 
42 	asm volatile(str(PASTE(0, %1, 0, 0))";"
43 			"mfcr %0;"
44 			: "=r" (cr)
45 			: "b" (i)
46 			: "memory"
47 		    );
48 	return cr;
49 }
50 
51 static inline int paste_last(void *i)
52 {
53 	int cr;
54 
55 	asm volatile(str(PASTE(0, %1, 1, 1))";"
56 			"mfcr %0;"
57 			: "=r" (cr)
58 			: "b" (i)
59 			: "memory"
60 		    );
61 	return cr;
62 }
63 
64 #define PPC_INST_COPY                  __COPY(0, 0, 0)
65 #define PPC_INST_COPY_FIRST            __COPY(0, 0, 1)
66 #define PPC_INST_PASTE                 __PASTE(0, 0, 0, 0)
67 #define PPC_INST_PASTE_LAST            __PASTE(0, 0, 1, 1)
68 
69 #endif /* _SELFTESTS_POWERPC_INSTRUCTIONS_H */
70