Hi,

 

I'm trying to use MUSL on a hardware without floating point unit, however,
the "union" in the bin_index brings some issues.

I'm using -mgeneral-regs-only and gcc refuses to compile it due to the
floating point conversion.

 

I'm wondering what's the purpose of the union? How should I rewrite it to
use integer only?

 

static int bin_index(size_t x)

{

                x = x / SIZE_ALIGN - 1;

                if (x <= 32) return x;

                if (x > 0x1c00) return 63;

                return ((union { float v; uint32_t r; }){(int)x}.r>>21) -
496;  

}

 

Thanks a lot,

Weiming

 

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