Texas Instruments TMS320C67X/C67X+ DSP - Manual (Page 319)

Subtract Conditionally and Shift−Used for Division SUBC
3-259 Instruction Set SPRU733
Example 1 SUBC .L1 A0,A1,A0
Before instruction 1 cycle after instruction
A0 0000 125Ah 4698 A0 0000 024B4h 9396
A1 0000 1F12h 7954 A1 0000 1F12h
Example 2 SUBC .L1 A0,A1,A0
Before instruction 1 cycle after instruction
A0 0002 1A31h 137777 A0 0000 47E5h 18405
A1 0001 F63Fh 128575 A1 0001 F63Fh