SDOT (2-way, vectors) Signed integer dot product The signed integer dot product instruction computes the dot product of a group of two signed 16-bit integer values held in each 32-bit element of the first source vector multiplied by a group of two signed 16-bit integer values in the corresponding 32-bit element of the second source vector, and then destructively adds the widened dot product to the corresponding 32-bit element of the destination vector. This instruction is unpredicated. Green False True True 0 1 0 0 0 1 0 0 0 0 0 1 1 0 0 1 0 SDOT <Zda>.S, <Zn>.H, <Zm>.H if !IsFeatureImplemented(FEAT_SME2) && !IsFeatureImplemented(FEAT_SVE2p1) then UNDEFINED; constant integer esize = 32; constant integer n = UInt(Zn); constant integer m = UInt(Zm); constant integer da = UInt(Zda); <Zda> Is the name of the third source and destination scalable vector register, encoded in the "Zda" field. <Zn> Is the name of the first source scalable vector register, encoded in the "Zn" field. <Zm> Is the name of the second source scalable vector register, encoded in the "Zm" field. CheckSVEEnabled(); constant integer VL = CurrentVL; constant integer PL = VL DIV 8; constant integer elements = VL DIV esize; constant bits(VL) operand1 = Z[n, VL]; constant bits(VL) operand2 = Z[m, VL]; constant bits(VL) operand3 = Z[da, VL]; bits(VL) result; for e = 0 to elements-1 bits(esize) res = Elem[operand3, e, esize]; for i = 0 to 1 constant integer element1 = SInt(Elem[operand1, 2 * e + i, esize DIV 2]); constant integer element2 = SInt(Elem[operand2, 2 * e + i, esize DIV 2]); res = res + element1 * element2; Elem[result, e, esize] = res; Z[da, VL] = result;