FMLALLBB, FMLALLBT, FMLALLTB, FMLALLTT (by element)

8-bit floating-point multiply-add long-long to single-precision (vector, by element)

This instruction widens the first (bottom bottom), second (bottom top), third (top bottom), or fourth (top top) 8-bit element of each 32-bit container in the first source vector and the indexed element from the second source vector to single-precision format and multiplies the corresponding elements. The intermediate products are scaled by 2^{-UInt(FPMR.LSCALE)}, before being destructively added without intermediate rounding to the single-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)

Decode for all variants of this encoding

if !IsFeatureImplemented(FEAT_FP8FMA) then EndOfDecode(Decode_UNDEF); constant integer n = UInt(Rn); constant integer m = UInt('00':Rm<2:0>); constant integer d = UInt(Rd); constant integer index = UInt(H:L:M:Rm<3>); constant integer elements = 128 DIV 32; constant integer sel = UInt(Q:size<0>);