FMMLA (non-widening)

Half-precision matrix multiply-accumulate

This instruction multiplies the 2x2 matrix of half-precision values in each 64-bit segment of the first source vector by the 2x2 matrix of half-precision values in the corresponding 64-bit segment of the second source vector. The intermediate products are rounded before they are summed, and the intermediate sum is rounded before accumulation into the 2x2 half-precision matrix held in the corresponding 64-bit segment of the addend and destination vector. This is equivalent to performing a 2-way dot product per destination element.

Advanced SIMD
(FEAT_F16MM)

Decode for this encoding

if !IsFeatureImplemented(FEAT_F16MM) then EndOfDecode(Decode_UNDEF); end; let d : integer{} = UInt(Rd); let n : integer{} = UInt(Rn); let m : integer{} = UInt(Rm);