Texas Instruments MSP50C614 manual Mulapl Multiply and Accumulate Result, PH ,PL MR * src

Individual Instruction Descriptions

4.14.40 MULAPL						Multiply and Accumulate Result
Syntax
	[label]	name		dest, src [, mod]									Clock, clk				Word, w			With RPT, clk							Class
		MULAPL		An, {adrs}											Table 4±46					Table 4±46							1b
		MULAPL		An[~], An[~] [, next A]										1				1				nR+3					3
Execution			[premodify AP if mod specified]
			PH,PL ⇐ MR * src
			dest ⇐ dest + PL
			PC ⇐ PC + 1
Flags Affected			OF, SF, ZF, CF are set accordingly
			src is {adrs}:							TAG bit is set accordingly
Opcode
Instructions				16		15	14	13	12		11	10		9		8	7	6	5	4		3		2		1		0
MULAPL An, {adrs}				0		1	1	0	1		1	0			An						adrs
				x				dma16 (for direct) or offset16 (long relative) [see section 4.13]
MULAPL An[~], An[~], [next A]				1		1	1	0	0		next A				An		1	1	0	0		1	0		A~			~A
Description			Perform multiplication of multiply register (MR) and value of src. The 16 MSBs
			of the 32-bit product are stored in the product high (PH) register. The 16 LSBs
			of the product (contained in product low (PL) register) added to dest. Certain
			restriction applies to the use of this instruction when interrupts are occuring in
			the background. See Section 4.8 for more detail.
Syntax					Description
MULAPL {adrs}					Multiply MR by RAM word, add PL to An
MULAPL An[~], An[~] [, next A]					Multiply MR by An[~] word, add PL to An[~]
See Also			MULAPLS, MULSPL, MULSPLS, MULTPL, MULTPLS
Example 4.14.40.1			MULAPL A0, *R3++

Multiply MR with the content of data memory word stored at byte location pointed by R3, add PL to accumulator A0, and store result in accumulator A0. Increment R3 by 2.

Example 4.14.40.2 MULAPL A2, A2~, ±±A

Multiply MR register to accumulator A2~, add PL to accumulator A2, and store result to accumulator

A2.

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