Re: [MiNT] mulu.l with 68000

[Andreas Schwab <schwab@linux-m68k.org>]

Vincent Rivière <vincent.riviere@freesbee.fr> writes:

> On 26/01/2014 19:03, David Gálvez wrote:
>> does anybody have the routine to emulate the instruction mulu.l dx,dy
>> with a 68000?
>
> There is one in libgcc, it is named __mulsi3().
>
>         move.l a,-(sp)
>         move.l b,-(sp)
>         jsr ___mulsi3
>         addq.l #8,%sp
>
> Then compile with -lgcc (if not already the case).

You can also use umul_ppmm from longlong.h and discard the high 32 bits.

Andreas.

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Andreas Schwab, schwab@linux-m68k.org
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