Altera Nios II User Manual page 251

Chapter 8: Instruction Set Reference
Instruction Set Reference
muli
Operation:
Assembler Syntax:
Example:
Description:
Exceptions:
Instruction Type:
Instruction Fields:
31 30 29 28 27 26 25
A
February 2014 Altera Corporation
rB ← (rA × σ(IMM16))
31..0
muli rB, rA, IMM16
muli r6, r7, -100
Sign-extends the 16-bit immediate value IMM16 to 32 bits and multiplies it by the value of rA.
Stores the 32 low-order bits of the product to rB. The result is independent of whether rA is
treated as a signed or unsigned number.
Nios II processors that do not implement the muli instruction cause an unimplemented
instruction exception.
Carry Detection and Overflow Detection:
For a discussion of carry and overflow detection, refer to the mul instruction.
Unimplemented instruction
I
A = Register index of operand rA
B = Register index of operand rB
IMM16 = 16-bit signed immediate value
24 23 22 21 20 19 18 17
B
16 15 14 13 12 11 10 9
IMM16
multiply immediate
8 7 6 5 4 3 2 1
0x24
Nios II Processor Reference Handbook
8–71
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