VFMA, VFMS, VFNMA, VFNMS (floating-point)
Fused floating-point multiply accumulate and fused floating-point multiply subtract, with optional negation.
Syntax
VF{N}opcond.F64 {DdDnDm
VF{N}opcond.F32 {SdSnSm
where:
opis one of
MAorMS.N-
negates the final result.
condis an optional condition code.
Sd,Sn,Smare the single-precision registers for the result and operands.
Dd,Dn,Dmare the double-precision registers for the result and operands.
Operation
VFMA multiplies the values in the operand
registers, adds the value in the destination register, and places the final result in the
destination register. The result of the multiply is not rounded before the accumulation.
VFMS multiplies the values in the operand
registers, subtracts the product from the value in the destination register, and places the
final result in the destination register. The result of the multiply is not rounded before
the subtraction.
In each case, the final result is negated if the N option is used.
Floating-point exceptions
These instructions can produce Input Denormal, Invalid Operation, Overflow, Underflow, or Inexact exceptions.