BF1CVT, BF2CVT

Multi-vector 8-bit floating-point convert to BFloat16

This instruction converts each 8-bit floating-point element of the source vector to BFloat16 while downscaling the value, and places the results in the corresponding 16-bit elements of the destination vectors. BF1CVT scales the values by 2^{-UInt(FPMR.LSCALE[5:0])}. BF2CVT scales the values by 2^{-UInt(FPMR.LSCALE2[5:0])}. The 8-bit floating-point encoding format for BF1CVT is selected by FPMR.F8S1. The 8-bit floating-point encoding format for BF2CVT is selected by FPMR.F8S2.

This instruction is unpredicated.

It has encodings from 2 classes: BF1CVT and BF2CVT

BF1CVT
(FEAT_SME2 && FEAT_FP8)

Decode for this encoding

if !IsFeatureImplemented(FEAT_SME2) || !IsFeatureImplemented(FEAT_FP8) then EndOfDecode(Decode_UNDEF); end; let n : integer = UInt(Zn); let d : integer = UInt(Zd:: '0'); let issrc2 : boolean = FALSE;

BF2CVT
(FEAT_SME2 && FEAT_FP8)

Decode for this encoding

if !IsFeatureImplemented(FEAT_SME2) || !IsFeatureImplemented(FEAT_FP8) then EndOfDecode(Decode_UNDEF); end; let n : integer = UInt(Zn); let d : integer = UInt(Zd:: '0'); let issrc2 : boolean = TRUE;