tree 8971b00693f003a5e5b71d57b40fd5d91de11879
parent 51858aaf9bea3ddf166bf9d252a1fc351260b497
author Zong Li <zongbox@gmail.com> 1538470349 +0800
committer Palmer Dabbelt <palmer@sifive.com> 1540252976 -0700
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lib: Add umoddi3 and udivmoddi4 of GCC library routines

Add umoddi3 and udivmoddi4 support for 32-bit.

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.

The udivmoddi4 and umoddi3 are copies from libgcc in gcc. There are other
functions use the udivmoddi4 in libgcc, so I separate the umoddi3 and
udivmoddi4 for flexible extension in the future.

Signed-off-by: Zong Li <zong@andestech.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>