DSP Core Reference Manual

CMPEQA
SC140 DSP Core Reference Manual A-121
CMPEQA Compare for Equal (AGU) CMPEQA
Description
Status and Conditions that Affect Instruction
Status and Conditions Changed by Instruction
Example
cmpeqa r1,r2
Operation Assembler Syntax
If rx == Rx, then 1 → T, else 0 → T
CMPEQA rx,Rx
CMPEQA rx,Rx
Compares two AGU registers (rx and Rx) for equality. Note that a register cannot be compared to itself
using this instruction.
Register Address Bit Name Description
SR[18] EXP Determines which stack pointer is used when the stack pointer is an
operand. Otherwise, the instruction is not affected by SR.
Register Address Bit Name Description
SR[1] T Sets T bit if equal, otherwise cleared.
Register/Memory Address Before After
R1
$0000 0005
R2
$0000 0005
SR
$00E4 0000 $00E4 0002