BFMOPA (non-widening)

BFloat16 floating-point outer product and accumulate

This instruction works with a 16-bit element ZA tile.

These instructions generate an outer product of the first source vector and the second source vector. The first source is SVL_H×1 vector and the second source is 1×SVL_H vector.

Each source vector is independently predicated by a corresponding governing predicate. When either source vector element is Inactive the corresponding destination tile element remains unmodified.

The resulting outer product, SVL_H×SVL_H, is then destructively added to the destination tile. This is equivalent to performing a single multiply-accumulate to each of the destination tile elements.

This instruction follows SME2 ZA-targeting non-widening BFloat16 numerical behaviors.

ID_AA64SMFR0_EL1.B16B16 indicates whether this instruction is implemented.

SME2
(FEAT_SVE_B16B16)

if !IsFeatureImplemented(FEAT_SME2) || !IsFeatureImplemented(FEAT_SVE_B16B16) then UNDEFINED; constant integer a = UInt(Pn); constant integer b = UInt(Pm); constant integer n = UInt(Zn); constant integer m = UInt(Zm); constant integer da = UInt(ZAda);