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From:   Zong Li <zongbox@gmail.com>
Date:   Wed, 26 Sep 2018 15:12:45 +0800
Message-ID: <CA+ZOyagnA=NRjRH4qWw8FgOTBr1uAvDvK1Pk8MAw8ysQdgdfPA@mail.gmail.com>
Subject: Re: [PATCH 3/5] lib: Add umoddi3 and udivmoddi4 of GCC library routines
To:     schwab@suse.de
Cc:     hch@infradead.org, Palmer Dabbelt <palmer@sifive.com>,
        aou@eecs.berkeley.edu, Vincent Chen <vincentc@andestech.com>,
        Zong Li <zong@andestech.com>, linux-riscv@lists.infradead.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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Andreas Schwab <schwab@suse.de> =E6=96=BC 2018=E5=B9=B49=E6=9C=8825=E6=97=
=A5 =E9=80=B1=E4=BA=8C =E4=B8=8B=E5=8D=883:20=E5=AF=AB=E9=81=93=EF=BC=9A
>
> On Sep 25 2018, Zong Li <zongbox@gmail.com> wrote:
>
> > The RV32 need the umoddi3 to do modulo when the operands are long long
> > type, like other libraries implementation such as ucmpdi2, lshrdi3 and
> > so on. I encounter the undefined reference 'umoddi3' when I use the in
> > house dma driver, although it is in house driver, but I think that
> > umoddi3 is a common function for RV32.
>
> You probably should use the macros from <asm/div64.h> instead.

Hi Andreas,

This doesn't work for me, the divisor of my case is also long long type.