ref: 4eb4620b762356413a8c16abfa2cea1f89a3eeec
dir: /sys/src/libc/mips/vlop.s/
TEXT _mulv(SB), $0 MOVW 8(FP), R2 MOVW 4(FP), R3 MOVW 16(FP), R4 MOVW 12(FP), R5 MULU R4, R2 MOVW LO, R6 MOVW HI, R7 MULU R3, R4 MOVW LO, R8 ADDU R8, R7 MULU R2, R5 MOVW LO, R8 ADDU R8, R7 MOVW R6, 4(R1) MOVW R7, 0(R1) RET