GMS30C2216 Datasheet, PDF (222/320 Pages) Hynix Semiconductor – 16/32 BIT RISC/DSP

A-50
Unsigned multiplication, double word product
Appendix A. Instruction Set Details
EMULU
Format:
LLext format
15
87
43
0
OP-code
1100 1110
Ld-code
Ls-code
OP-code extention
0000 0001 0000 0100 (0x0104)
Ls-code encoded L0..L15 for Ls
Ld-code encoded L0..L15 for Ld
Notation:
EMULU Ld, Ls
Description:
The extended DSP instruction uses on-chip multiply-accumulate unit. An Extended DSP
instruction is issued in one cycle; the processor starts execution of the next instruction
before the Extended DSP instruction is finished.
Double-word results are always placed in G14 and G15. The condition flags remain
unchanged
Operation:
G14//G15 = Ld * Ls
Exceptions:
None.