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VDOT (vector)

BFloat16 floating-point (BF16) dot product (vector). This instruction delimits the source vectors into pairs of 16-bit BF16 elements. Within each pair, the elements in the first source vector are multiplied by the corresponding elements in the second source vector. The resulting single-precision products are then summed and added destructively to the single-precision element in the destination vector which aligns with the pair of BF16 values in the first source vector. The instruction does not update the FPSCR exception status.

It has encodings from the following instruction sets: A32 ( A1 ) and T32 ( T1 ) .

A1
(FEAT_AA32BF16)

Decode for all variants of this encoding

if !IsFeatureImplemented(FEAT_AA32BF16) then Undefined(); end; if Q == '1' && (Vd[0] == '1' || Vn[0] == '1' || Vm[0] == '1') then Undefined(); end; let d : integer = UInt(D::Vd); let n : integer = UInt(N::Vn); let m : integer = UInt(M::Vm); let regs : integer = if Q == '1' then 2 else 1;

T1
(FEAT_AA32BF16)

Decode for all variants of this encoding

if InITBlock() then UnpredictableProcedure(); end; if !IsFeatureImplemented(FEAT_AA32BF16) then Undefined(); end; if Q == '1' && (Vd[0] == '1' || Vn[0] == '1' || Vm[0] == '1') then Undefined(); end; let d : integer = UInt(D::Vd); let n : integer = UInt(N::Vn); let m : integer = UInt(M::Vm); let regs : integer = if Q == '1' then 2 else 1;