Texas Instruments TMS320C28x Reference Manual page 385

MPY ACC, T, loc16
MPY ACC, T, loc16
SYNTAX OPTIONS
MPY ACC,T,loc16
Operands ACC
T
loc16
Description
Flags and Z
Modes
N
Repeat
Example
; Calculate signed using 16-bit multiply:
; Y32 = Y32 + X16*M16
MOV
MPY
ADDL
6-228
0001 0010 LLLL LLLL
Accumulator register
Multiplicand register
Addressing mode (see Chapter 5)
Multiply the signed 16-bit content of the T register by the signed 16-bit
contents of the location pointed to by the "loc16" addressing mode and store
the result in the ACC register:
ACC = signed T * signed [loc16];
After the operation, the Z flag is set if the ACC is zero, else Z is cleared.
After the operation, the N flag is set if bit 31 of the ACC is 1, else N is
cleared.
This instruction is not repeatable. If this instruction follows the RPT
instruction, it resets the repeat counter (RPTC) and executes only once.
T,@X16 ; T = X16
ACC,T,@M16 ; ACC = T * M16
@Y32,ACC ; Y32 = Y32 + ACC
OPCODE OBJMODE
16 X 16-bit Multiply
RPT CYC
X − 1