root/tools/testing/selftests/powerpc/include/instructions.h

INCLUDED FROM

DEFINITIONS

1. copy
2. copy_first
3. paste
4. paste_last

   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 */