Texas Instruments TMS320C67X/C67X+ DSP - Manual (Page 124)

ADDU Add Two Unsigned Integers Without Saturation
3-64 Instruction Set SPRU733
Example 1 ADDU .L1 A1,A2,A5:A4
Before instruction 1 cycle after instruction
A1 0000 325Ah 12890 † A1 0000 325Ah
A2 FFFF FF12h 4294967058 † A2 FFFF FF12h
A5:A4 xxxx xxxxh A5:A4 0000 0001h 0000 316Ch 4294979948
‡
† Unsigned 32-bit integer
‡ Unsigned 40-bit (long) integer
Example 2 ADDU .L1 A1,A3:A2,A5:A4
Before instruction 1 cycle after instruction
A1 0000 325Ah 12890 A1 0000 325Ah
A3:A2 0000 00FFh FFFF FF12h 1099511627538
‡
A3:A2 0000 00FFh FFFF FF12h
A5:A4 0000 0000h 0000 0000h 0 A5:A4 0000 0000h 0000 316Ch 12652 ‡
† Unsigned 32-bit integer
‡ Unsigned 40-bit (long) integer