ref: 8389465f94cce8a571910c8575d5a87c0b8dbd5c dir: /sys/src/libc/amd64/muldiv.s/
TEXT umuldiv(SB), $0 MOVL RARG, AX MULL b+8(FP) DIVL c+16(FP) RET TEXT muldiv(SB), $0 MOVL RARG, AX IMULL b+8(FP) IDIVL c+16(FP) RET END