ADDB SP, #7bit
6-32
ADDB SP, #7bit Add 7-bit Constant to Stack Pointer
SYNTAX OPTIONS OPCODE OBJMODE RPT CYC
ADDB SP, #7bit 1111 1110 0CCC CCCC X
− 1
Operands SP Stack pointer
#7bit 7-bit immediate unsigned constant value
Description Add a 7-bit unsigned constant to SP and store the result in SP:
SP = SP + 0:7bit;
Flags and
Modes
None
Repeat This instruction is not repeatable. If this instruction follows the RPT instruction,
it resets the repeat counter (RPTC) and executes only once
Example
FuncA:
ADDB SP, #N
; Function with local variables on stack.
; Reserve N 16-bit words of space for
; local variables on stack:
.
.
.
SUBB SP, #N ; Deallocate reserved stack space.
LRETR ; Return from function.
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