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Re: [PATCH v2 3/3] Add ffsl(), ffsll(), fls(), flsl(), flsll()
On 27/07/17 03:40, Kito Cheng wrote:
I am testing with RISC-V with newlib/trunk and just hang on ffs,
after investigate, I saw gcc just generate a ffs call in ffs for riscv64
and I guess riscv64 is not the only target will hit this bug,
so maybe we can revert the part of this patch, at least for ffs.c?
We should first investigate why GCC performs this optimization. The file
is compiled with -fno-builtin, so it some other optimization. Maybe we
need something like __attribute__ ((__optimize__
("-fno-tree-loop-distribute-patterns"))) as in string/local.h.
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- References:
- [PATCH 3/3] Add ffsl(), ffsll(), fls(), flsl(), flsll()
- [PATCH v2 3/3] Add ffsl(), ffsll(), fls(), flsl(), flsll()
- Re: [PATCH v2 3/3] Add ffsl(), ffsll(), fls(), flsl(), flsll()
- Re: [PATCH v2 3/3] Add ffsl(), ffsll(), fls(), flsl(), flsll()