FMLALB, FMLALT (by element)

8-bit floating-point multiply-add long to half-precision (vector, by element). This instruction widens the even-numbered (bottom) or odd-numbered (top) 8-bit elements in the first source vector and the indexed element from the second source vector to half-precision format and multiplies the corresponding elements. The intermediate products are scaled by 2^{-UInt(FPMR.LSCALE[3:0])}, before being destructively added without intermediate rounding to the half-precision elements of the destination vector that overlap with the corresponding 8-bit floating-point elements in the first source vector.

The 8-bit floating-point encoding format for the elements of the first source vector is selected by FPMR.F8S1. The 8-bit floating-point encoding format for the elements of the second source vector is selected by FPMR.F8S2.

Advanced SIMD
(FEAT_FP8FMA)

if !IsFeatureImplemented(FEAT_FP8FMA) then UNDEFINED; integer n = UInt(Rn); integer m = UInt('00':Rm<2:0>); integer d = UInt(Rd); integer index = UInt(H:L:M:Rm<3>); constant integer elements = 128 DIV 16; integer sel = UInt(Q);