DSP Core Reference Manual

A-390 SC140 DSP Core Reference Manual

SUB

Example 2

sub d0,d1,d2

Scaling up is set in SR[5], so L2 bit is set from overflow from bit 30.

Instruction Formats and Opcodes

Note: ** indicates serial grouping encoding.

L2:D2

$0:$FF FFFF FFFD

EMR

$0000 0000

$FF D000 0000

$00 2000 0000

$00E4 0020 $00E4 0021

L2:D2

$1:$00 5000 0000

EMR

$0000 0000

Instruction Words Cycles Type Opcode

15 8 7 0

SUB #u5,Dn 1 1 1 0*1110FFF11 iiiii

15 8 7 0

SUB Da,Db,Dn 1 1 1 0*1011FFF00JJJJJ

15 8 7 0

SUB Db,Da,Dn 1 1 1 0*1011FFF01JJJJJ

15 8 7 0

SUB Da,Da,Dn 1 1 1 0*1000FFF11001 j j