ADDU ACC,loc16
6-39
ADDU ACC,loc16
Add Unsigned Value to Accumulator
SYNTAX OPTIONS
OPCODE
OBJMODE
RPT
CYC
ADDU ACC,loc16
0000 1101 LLLL LLLL
X
Y
N+1
Operands
ACC
Accumulator register
loc16
Addressing mode (see Chapter 5)
Description
Add the 16-bit contents of the location pointed to by the “loc16” addressing
mode to the ACC register. The addressed location is zero extended before the
add:
ACC = ACC + 0:[loc16];
Flags and
Modes
Z
After the addition, the Z flag is set if ACC is zero, else Z is cleared.
N
After the addition, the N flag is set if bit 31 of the ACC is 1, else N is cleared.
C
If the addition generates a carry, C is set; otherwise C is cleared.
V
If an overflow occurs, V is set; otherwise V is not affected.
OVC
If (OVM = 0, disabled) then if the operation generates a positive overflow, then
the counter is incremented and if the operation generates a negative overflow,
then the counter is decremented. If (OVM = 1, enabled) then the counter is not
affected by the operation.
OVM
If overflow mode bit is set; then the ACC value will saturate maximum positive
(0x7FFFFFFF) or maximum negative (0x80000000) if the operation
overflowed.
Repeat
If this operation is repeated, then the instruction will be executed N+1 times.
The state of the Z, N, C flags will reflect the final result. The V flag will be set if
an intermediate overflow occurs. The OVC flag will count intermediate
overflows, if overflow mode is disabled.
Example
; Add three 32-bit unsigned variables by 16-bit parts:
MOVU ACC,@VarAlow
; AH = 0, AL = VarAlow
ADD ACC,@VarAhigh << 16
; AH = VarAhigh, AL = VarAlow
ADDU ACC,@VarBlow
; ACC = ACC + 0:VarBlow
ADD ACC,@VarBhigh << 16
; ACC = ACC + VarBhigh << 16
ADDCU ACC,@VarClow
; ACC = ACC + V Carry
ADD ACC,@VarChigh << 16
; ACC = ACC + VarChigh << 16
Summary of Contents for TMS320C28x
Page 30: ...1 12...
Page 80: ...This page intentionally left blank 2 50 This page intentionally left blank...
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...
Page 585: ...This page intentionally left blank 7 32 This page intentionally left blank...