nand

NAND

nand RA, RS, RB

Bitwise NAND. RA = ~(RS & RB).

Encoding

Binary Layout

31

0:5

RS

6:10

RA

11:15

RB

16:20

476

21:30

/

31

 

Format X-form

Opcode 0x7C0003B8

Extension Base

Operands

• RA
  Target
• RS
  Src A
• RB
  Src B

Example

nand r4, r3, r5

Registers Altered

CR

Related

More in Base

Reference

View in PowerISA v3.1C Specification ↗ OPF Power ISA v3.1C

Description

Performs a bitwise NAND operation: RA ← ~(RS AND RB). Each bit position in RA is set to 1 if the corresponding bits in RS and RB are not both 1, 0 otherwise. No condition registers or status fields are affected unless an extended form with a recorded bit is used (nand.).

Operation

RA ← ~(RS & RB)

Programming Note

The crnand instruction is useful for performing bitwise NAND operations on specific bits within the Condition Register. Ensure that the bit positions specified by BA, BB, and BT are valid to avoid undefined behavior. This instruction operates at user privilege level and does not generate exceptions under normal conditions.