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DEC loc16
6-84
DEC loc16
Decrement by 1
SYNTAX OPTIONS
OPCODE
OBJMODE
RPT
CYC
DEC loc16
0000 1011 LLLL LLLL
X
−
1
Operands
loc16
Addressing mode (see Chapter 5)
Description
Subtract 1 from the signed content of the location pointed to by the “loc16”
addressing mode:
Flags and
Modes
N
After the operation if bit 15 of [loc16] is 1, set N; otherwise, clear N.
Modes
Z
After the operation if [loc16] is zero, set Z; otherwise, clear Z.
C
If the subtraction generates a borrow, C is cleared; otherwise C is set.
V
If an overflow occurs, V is set; otherwise V is not affected.
Repeat
This instruction is not repeatable. If this instruction follows the RPT
instruction, it resets the repeat counter (RPTC) and executes only once.
Example
; VarA = VarA − 1;
DEC @VarA
; Decrement contents of VarA
Summary of Contents for TMS320C28x
Page 30: ...1 12...
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Page 269: ...IN loc16 PA 6 112 MOV AL 0 AL 0 UOUT IORegC AL IOspace IORegC AL 10...
Page 308: ...MAXCUL P loc32 6 151 Saturate MOVL Var64 2 ACC Store result into Var64 MOVL Var64 P...
Page 509: ...SUBL ACC P PM 6 352 SUBL ACC P PM ACC S B 11 M X 4 MOVH Y ACC 5 Store Q15 result into Y...
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