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applied Keith's patch for "safe" type-punning.

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made IS_NEGATIVE produce a boolean (useful when xoring with other booleans).
This commit is contained in:
Daniel Borca 2005-01-11 10:56:39 +00:00
parent 5358682aa7
commit 94dd520210
1 changed files with 8 additions and 8 deletions
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16
src/mesa/main/imports.h
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@ -340,8 +340,13 @@ static INLINE int IS_INF_OR_NAN( float x )
*** IS_NEGATIVE: test if float is negative
***/
#if defined(USE_IEEE)
#define GET_FLOAT_BITS(x) ((fi_type *) &(x))->i
#define IS_NEGATIVE(x) (GET_FLOAT_BITS(x) & (1<<31))
static INLINE int GET_FLOAT_BITS( float x )
{
fi_type fi;
fi.f = x;
return fi.i;
}
#define IS_NEGATIVE(x) (GET_FLOAT_BITS(x) < 0)
#else
#define IS_NEGATIVE(x) (x < 0.0F)
#endif
@ -567,14 +572,9 @@ static INLINE int iceil(float f)
/***
*** COPY_FLOAT: copy a float from src to dest, avoid slow FP regs if possible
*** COPY_FLOAT: copy a float from src to dest.
***/
#if defined(USE_IEEE) && !defined(DEBUG)
#define COPY_FLOAT( dst, src ) \
((fi_type *) &(dst))->i = ((fi_type *) (void *) &(src))->i
#else
#define COPY_FLOAT( dst, src ) (dst) = (src)
#endif
/***