openpower/isa/condition.mdwn

   1 <!-- Instructions here described in PowerISA Version 3.0 B Book 1 -->
   2
   3 <!-- Section 2.5.1 Condition Register Logical Instructions Pages 40 - 41 -->
   4
   5 <!-- The Condition Register Logical instructions have preferred forms; see Section -->
   6 <!-- 1.9.1. -->
   7
   8 <!-- In the preferred forms, the BT and BB fields satisfy the following rule: -->
   9
  10 <!-- * The bit specified by BT is in the same Condition Register field as the bit -->
  11 <!-- specified by BB. -->
  12
  13 # Condition Register AND
  14
  15 XL-Form
  16
  17 * crand BT,BA,BB
  18
  19 Pseudo-code:
  20
  21     CR[BT+32] <-  CR[BA+32] & CR[BB+32]
  22
  23 Special Registers Altered:
  24
  25     CR[BT+32]
  26
  27 # Condition Register NAND
  28
  29 XL-Form
  30
  31 * crnand BT,BA,BB
  32
  33 Pseudo-code:
  34
  35     CR[BT+32] <- ¬(CR[BA+32] & CR[BB+32])
  36
  37 Special Registers Altered:
  38
  39     CR[BT+32]
  40
  41 # Condition Register OR
  42
  43 XL-Form
  44
  45 * cror BT,BA,BB
  46
  47 Pseudo-code:
  48
  49     CR[BT+32] <-  CR[BA+32] | CR[BB+32]
  50
  51 Special Registers Altered:
  52
  53     CR[BT+32]
  54
  55 # Condition Register XOR
  56
  57 XL-Form
  58
  59 * crxor     BT,BA,BB
  60
  61 Pseudo-code:
  62
  63     CR[BT+32] <- CR[BA+32] ^ CR[BB+32]
  64
  65 Special Registers Altered:
  66
  67     CR[BT+32]
  68
  69 # Condition Register NOR
  70
  71 XL-Form
  72
  73 * crnor BT,BA,BB
  74
  75 Pseudo-code:
  76
  77     CR[BT+32] <- ¬(CR[BA+32] | CR[BB+32])
  78
  79 Special Registers Altered:
  80
  81     CR[BT+32]
  82
  83 # Condition Register Equivalent
  84
  85 XL-Form
  86
  87 * creqv BT,BA,BB
  88
  89 Pseudo-code:
  90
  91     CR[BT+32] <- ¬(CR[BA+32] ^ CR[BB+32])
  92
  93 Special Registers Altered:
  94
  95     CR[BT+32]
  96
  97 # Condition Register AND with Complement
  98
  99 XL-Form
 100
 101 * crandc BT,BA,BB
 102
 103 Pseudo-code:
 104
 105     CR[BT+32] <- CR[BA+32] &  ¬CR[BB+32]
 106
 107 Special Registers Altered:
 108
 109     CR[BT+32]
 110
 111 # Condition Register OR with Complement
 112
 113 XL-Form
 114
 115 * crorc BT,BA,BB
 116
 117 Pseudo-code:
 118
 119     CR[BT+32] <- CR[BA+32] |  ¬CR[BB+32]
 120
 121 Special Registers Altered:
 122
 123     CR[BT+32]
 124
 125 # Move Condition Register Field
 126
 127 XL-Form
 128
 129 * mcrf BF,BFA
 130
 131 Pseudo-code:
 132
 133     CR[4*BF+32:4*BF+35] <- CR[4*BFA+32:4*BFA+35]
 134
 135 Special Registers Altered:
 136
 137     CR field BF
 138
 139 <!-- Checked March 2021 -->