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softfloat-native: add float32_is_nan()

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Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6002 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aurel32 2008-12-13 11:46:15 +00:00
parent 3f911a51b2
commit 629bd74a4f
2 changed files with 10 additions and 0 deletions
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9
fpu/softfloat-native.c
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@ -250,6 +250,15 @@ int float32_is_signaling_nan( float32 a1)
return ( ( ( a>>22 ) & 0x1FF ) == 0x1FE ) && ( a & 0x003FFFFF );
}
int float32_is_nan( float32 a1 )
{
float32u u;
uint64_t a;
u.f = a1;
a = u.i;
return ( 0xFF800000 < ( a<<1 ) );
}
/*----------------------------------------------------------------------------
| Software IEC/IEEE double-precision conversion routines.
*----------------------------------------------------------------------------*/