Texas Instruments TMS320C3x 사용자 설명서
Call Subroutine
CALL
13-85
Assembly Language Instructions
Syntax
CALL
src
Operation
Next PC
→
*++SP
src
→
PC
Operands
src long-immediate addressing mode
Opcode
31
24 23
16
8 7
0
15
0 1 1 0 0
0
1
0
src
Description
A call is performed. The next PC value is pushed onto the system stack. The
src operand is loaded into the PC. The src operand is assumed to be a 24-bit
unsigned-immediate operand. Since the CALL instruction takes 4 cycles to
execute, the pipeline is flushed.
src operand is loaded into the PC. The src operand is assumed to be a 24-bit
unsigned-immediate operand. Since the CALL instruction takes 4 cycles to
execute, the pipeline is flushed.
Cycles
4
Status Bits
LUF
Unaffected
LV
Unaffected
UF
Unaffected
N
Unaffected
Z
Unaffected
V
Unaffected
C
Unaffected
OVM
Operation is not affected by OVM bit value.
Example
CALL 123456h
Before Instruction
After Instruction
PC
0005
PC
123456
SP
809801
SP
809802
LUF
0
LUF
0
LV
0
LV
0
UF
0
UF
0
N
0
N
0
Z
0
Z
0
V
0
V
0
C
0
C
0
Data memory
809802h
6
Mode Bit