Name: Texas Instruments TMS320C28x
Brand: Texas Instruments
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SUBB SP,#7bit

6-341

SUBB SP,#7bit

SYNTAX OPTIONS OPCODE OBJMODE RPT CYC

SUBB SP,#7bit 1111 1110 1CCC CCCC X − 1

Operands SP Stack pointer

#7bit 7-bit immediate constant value

Description Subtract 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: ; Function with local variables on

; stack.

ADDB SP,#N ; 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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Texas Instruments TMS320C28x Specifications

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