Freescale Semiconductor StarCore SC140 - Manual (Page 334)

A-20 SC140 DSP Core Reference Manual
ABS
A
ABS
Absolute Value (DALU)
ABS
Description
Status and Conditions that Affect Instruction
Status and Conditions Changed by Instruction
Example
abs d0
$FFF6 = -10, $000A = 10
Operation Assembler Syntax
⏐Dn⏐ → Dn
ABS Dn
ABS Dn
Replaces the value in a data register (Dn) with its absolute value.
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
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
SR $00E0 0000
L0:D0 $0:FF FFFF FFF6 $0:00 0000 000A
EMR $0000 0000