testui

Test User Interrupt

TESTUI

Sets CF if UIF is 1, ZF if User Interrupt Pending.

Details

The Test User Interrupt instruction sets CF if UIF is 1, ZF if User Interrupt Pending.

Pseudocode Operation

// Sets CF if UIF is 1, ZF if User Interrupt Pending

Example

TESTUI

Encoding

Binary Layout
F3
+0
0F
+1
01
+2
ED
+3
 
Format Legacy
Opcode F3 0F 01 ED
Extension UINTR

Operands