STMicroelectronics ST10 Series Programming Manual page 59

CALLA
Syntax
Operation
Description
If the condition specified by op1 is met, a branch to the absolute memory location specified by the second
operand op2 is taken. The value of the instruction pointer, IP, is placed onto the system stack. Because
the IP always points to the instruction following the branch instruction, the value stored on the system
stack represents the return address of the calling routine. If the condition is not met, no action is taken
and the next instruction is executed normally.
Condition Codes
See condition code Table 24 - page 35.
Flags
E
-
E Not affected
Z Not affected
V Not affected
C Not affected
N Not affected
Addressing Modes
Mnemonic
CALLA
Call Subroutine Absolute
CALLA
IF (op1) THEN
(SP)
((SP))
(IP)
ELSE
next instruction
END IF
Z
-
cc, caddr
ST10 FAMILY PROGRAMMING MANUAL
op1, op2
<-- (SP) - 2
<-- (IP)
<-- op2
V
-
Format
CA c0 MM MM
C N
- -
Bytes
4
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