Re: toolchain/45310: some mixed int/float computations are wrong on mips64

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Wed, Aug 31, 2011 at 01:30:06PM +0000, Manuel Bouyer wrote:
>  tracking this down, I ended up in fixunsgen_ieee754.c:__fixunsgen32.
>  It's called with
>  exp=5, sign=0, mant_dig=53, fracbits=20, frac={0, 0, 32768}
>  
>  as exp - mant_dig is larger than 32, __fixunsgen32 returns 0.
>  mant_dig is a constant from mips/float.h; I've no idea if it's right or
>  wrong here ...

It's DBL_MANT_DIG which is __DBL_MANT_DIG__ which is a gcc constant;
it seems to be the same for o32 ABI.
I also tested this on i386, and I get the exact same result.
So my guess would be that __fixunsgen32() is buggy ...

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
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