DMOV loc16
6-89
DMOV loc16 Data Move Contents of 16-bit Location
SYNTAX OPTIONS OPCODE OBJMODE RPT CYC
DMOV loc16 1010 0101 LLLL LLLL 1 Y N+1
Operands loc16 Addressing mode (see Chapter 5)
Note: For this operation, register−addressing modes cannot be used. The modes are:
@ARn, @AH, @AL, @PH, @PL, @SP, @T. An illegal instruction trap will be
generated.
Description Copy the contents pointed to by ”loc16” into the next highest address:
[loc16 + 1] = [loc16];
Flags and
Modes
None
Repeat This instruction is repeatable. If the operation is follows a RPT instruction,
then it will be executed N+1 times.
Example ; Calculate using 16-bit multiply:
; int16 X[3];
; int16 C[3];
; Y = (X[0]*C[0] >> 2) + (X[1]*C[1] >> 2) + (X[2]*C[2] >> 2);
; X[2] = X[1];
; X[1] = X[0];
SPM −2 ; Set product shift to >> 2
MOVP T,@X+2 ; T = X[2]
MPYS P,T,@C+2 ; P = T*C[2], ACC = 0
MOVA T,@X+1 ; T = X[1], ACC = X[2]*C[2] >> 2
MPY P,T,@C+1 ; P = T*C[1]
MOVA T,@X+0 ; T = X[0], ACC = ACC + X[1]*C[1] >> 2
MPY P,T,@C+0 ; P = T*C[0]
ADDL ACC,P << PM ; ACC = ACC + X[0]*C[0] >> 2
DMOV @X+1 ; X[2] = X[1]
DMOV @X+0 ; X[1] = X[0]
MOVL @Y,ACC ; Store result into Y
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