Condition Register Logical Instructions; Trap Instructions - IBM PowerPC 604 User Manual

2.3.4.4.3 Condition Register Logical Instructions
Condition register logical instructions, shown in Table 2-30, and the Move Condition
Register Field (mcrf) instruction are also defined as flow control instructions.
Table 2-30. Condition Register Logical Instructions
Name Mnemonic Operand Syntax
Condition Register AND crand crbD,crbA,crbB
Condition Register OR cror crbD,crbA,crbB
Condition Register XOR crxor crbD,crbA,crbB
Condition Register NANO
crnand
crbD,crbA,crbB
Condition Register NOR crnor crbD,crbA,crbB
Condition Register Equivalent creqv crbD,crbA, crbB
Condition Register AND with Complement crandc crbD,crbA, crbB
Condition Register OR
with
Complement
crorc
crbD,crbA, crbB
Move Condition Register Field mcrf crfD,crfS
Note that if the LR update option is enabled for any of these instructions, the PowerPC
architecture defines these fonns of the instructions as invalid.
2.3.4.4.4 Trap Instructions
The trap instructions shown in Table 2-31 are provided
to
test for a specified set of
conditions. If any of the conditions tested by a trap instruction are met, the system trap
handler is invoked. If the tested conditions are not met, instruction execution continues
normally.
Table 2-31. Trap Instructions
Name Mnemonic Operand
Syntax
Trap Word Immediate twl TO,rA,SIMM
Trap Word tw TO,rA,rB
See Appendix F, "Simplified Mnemonics," in
The Programming Environments Manual
for
a complete set of simplified mnemonics.
Chapter 2. PowerPC 604 Pr0C8880r Programming Model 2-45
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