Filter
Top Products
Individual Instruction Descriptions
4-153Assembly Language Instructions
4.14.57 RET Return From Subroutine (CALL, Ccc)
Syntax
[label] name Clock, clk Word, w With RPT, clk Class
RET 1 1 N/R 5
Execution PC ⇐ TOS
TOS ⇐ *R7
R7 ⇐ R7 – 2
Flags Affected None
Opcode
Instructions 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RET 1 1 0 1 1 1 1 0 0 0 1 1 1 1 1 1 0
Description Return from call or vectored call. Pop stack to program counter, continue
execution. Returns from subroutine calls (CALL, Ccc instructions) and
interrupts are different because of the way each process is handled. In order
to prevent execution pipeline problems the interrupt return (IRET) instruction
uses two cycles and the Return (RET) instruction cannot immediately follow
a CALL, i.e., RET followed by a RET should not be allowed.
See Also CALL, Ccc, IRET
Example 4.14.57.1 RET
Returns from subroutine. A CALL or Ccc instruction must have executed before.