R10 // low x[i]*y MULHDU R5, R14, R11 // high x[i]*y ADDC R15, R10 ADDZE R11 ADDC R9, R10 ADDZE R11, R9 MULLD R5, R16, R14 // low x[i+1]*y MULHDU R5, R16, R15 // high x[i+1]*y ADDC R17, R14 ADDZE R15 ADDC R9, R14 ADDZE R15, R9 MULLD R5, R18, R16 // low x[i+2]*y MULHDU R5, R18, R17 // high x[i+2]*y ADDC R19, R16 ADDZE R17 ADDC R9, R16 ADDZE R17, R9 MULLD R5, R20, R18 // low x[i+3]*y MULHDU R5, R20, R19 // high x[i+3]*y ADDC R21, R18 ADDZE R19 ADDC R9, R18 ADDZE R19, R9 MOVD R10, 0(R3) // z[i] MOVD R14,...