Instruction Set Architecture—IP2022 User’s Manual 176 www.ubicom.com MULS W,fr Signed Multiply fr,W into MULH || W Operation: W = fr × W; low 8 bits of signed product
MULH = fr × W; high 8 bits of signed product Bits affected: None Opcode: 0101 010f ffff ffff Description: This instruction performs a signed multiply of the
contents of the specified data memory location by
the contents of W. The low 8 bits of the product
are written to W, and the high 8 bits are written to
the MULH register. The data memory location is
left unchanged. Both    operands    are    interpreted    as    two’s-
complement numbers, and the result loaded into
MULH || W is also in two’s complement format. Cycles: 1