FMLALLTT (indexed)

8-bit floating-point multiply-add long long to single-precision (top top, indexed)

This 8-bit floating-point multiply-add long-long instruction widens the fourth 8-bit element of each 32-bit container in the first source vector and the indexed element from the corresponding 128-bit segment in 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 and the second source vector is selected by FPMR.F8S1 and FPMR.F8S2 respectively.

This instruction is unpredicated.

SVE2
(FEAT_FP8FMA)

if !HaveSVE2FP8FMA() then UNDEFINED; constant integer n = UInt(Zn); constant integer m = UInt(Zm); constant integer da = UInt(Zda); constant integer index = UInt(i4h:i4l);