Multiply-Add (MPYADD)

Built-in number for MPYADD is 681.
MPYADD (
       multiplicand : binary floating-point(8) value
       multiplier   : binary floating-point(8) value
       addend       : binary floating-point(8) value
) : binary floating-point(8) value

Description:   The multiplicand operand is multiplied by the multiplier operand. The result of the multiplication is then added to the addend operand and the result of this addition is returned as the result of the instruction. The MPYADD instruction may have better accuracy than doing separate multiply and add instructions.

Authorization Required

• None

Lock Enforcement

• None

Exceptions

0C Computation

• 0C06 Floating-Point Overflow
• 0C07 Floating-Point Underflow
• 0C09 Floating-Point Invalid Operand
• 0C0D Floating-Point Inexact Result