Increment a data register by one (dalu), Operation assembler syntax – Freescale Semiconductor StarCore SC140 User Manual
Page 511
INC
SC140 DSP Core Reference Manual
A-197
INC
Increment a Data Register By One (DALU)
INC
Description
Status and Conditions that Affect Instruction
Status and Conditions Changed by Instruction
Example 1
inc d0
Operation
Assembler Syntax
Dn + 1
→ Dn
INC Dn
INC Dn
Adds one to a data register (Dn).
Note:
The assembler maps this instruction to ADD #u5,Dn, where #u5 = 1.
Register Address
Bit Name
Description
SR[2]
SM
If set, selects 32-bit arithmetic saturation mode.
SR[5:4]
S[1:0]
Scaling mode bits determine which bits in the result are used in the
Ln bit calculation.
Register Address
Bit Name
Description
SR[0]
C
Calculates and updates the carry bit in the status register.
EMR[2]
DOVF
Set if the result cannot be represented in 40 bits, or if the result
saturates to 32 bits in arithmetic saturation mode.
Ln
L
If not in arithmetic saturation mode (SR [SM] = 0), calculates and
updates the Ln bit in the destination register. If in arithmetic
saturation mode (SR [SM] = 1), clears the Ln bit in the destination
register.
Register/Memory Address
Before
After
L0:D0
$0:$FF FFFF FFFF
$0:$00 0000 0000
SR
$00E4 0000
$00E4 0001
EMR
$0000 0000