ref: 9ced712a2ad70557a8ceb89ff3b969b92c85f68c
dir: /sys/src/libc/spim/vlop.s/
/* * from https://bitbucket.org/cherry9/plan9-loongson */ TEXT _mulv(SB), $0 MOVW 8(FP), R2 /* hi1 */ MOVW 4(FP), R3 /* lo1 */ MOVW 16(FP), R4 /* hi2 */ MOVW 12(FP), R5 /* lo2 */ MULU R5, R3 /* lo1*lo2 -> hi:lo*/ MOVW LO, R6 MOVW HI, R7 MULU R3, R4 /* lo1*hi2 -> _:hi */ MOVW LO, R8 ADDU R8, R7 MULU R2, R5 /* hi1*lo2 -> _:hi */ MOVW LO, R8 ADDU R8, R7 MOVW R6, 0(R1) /* lo */ MOVW R7, 4(R1) /* hi */ RET