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      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