FMMLA (widening, half-precision to single-precision)

Half-precision matrix multiply-accumulate to single-precision

This instruction performs two fused sums-of-products within each two pairs of adjacent half-precision elements while multiplying the 2x4 matrix of half-precision values held in the first source vector by the 4x2 matrix of half-precision values in the second source vector. The intermediate sums-of-products are rounded before they are summed, and their intermediate sum is rounded before accumulation into the 2x2 single-precision matrix in the destination vector. This is equivalent to performing a 4-way dot product per destination element.

Advanced SIMD
(FEAT_F16F32MM)

Decode for this encoding

if !IsFeatureImplemented(FEAT_F16F32MM) then EndOfDecode(Decode_UNDEF); end; let d : integer{} = UInt(Rd); let n : integer{} = UInt(Rn); let m : integer{} = UInt(Rm);