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mesa: move IS_NEGATIVE() and DIFFERENT_SIGNS() to macros.h

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This commit is contained in:
Brian Paul 2012-08-31 08:33:31 -06:00
parent a2cf265c8d
commit c8a86f717f
2 changed files with 32 additions and 29 deletions
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29
src/mesa/main/imports.h
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@ -224,35 +224,6 @@ static inline int IS_INF_OR_NAN( float x )
#endif
/***
*** IS_NEGATIVE: test if float is negative
***/
#if defined(USE_IEEE)
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
/***
*** DIFFERENT_SIGNS: test if two floats have opposite signs
***/
#if defined(USE_IEEE)
#define DIFFERENT_SIGNS(x,y) ((GET_FLOAT_BITS(x) ^ GET_FLOAT_BITS(y)) & (1<<31))
#else
/* Could just use (x*y<0) except for the flatshading requirements.
* Maybe there's a better way?
*/
#define DIFFERENT_SIGNS(x,y) ((x) * (y) <= 0.0F && (x) - (y) != 0.0F)
#endif
/***
*** CEILF: ceiling of float
*** FLOORF: floor of float

32
src/mesa/main/macros.h
View file

@ -689,6 +689,38 @@ NORMALIZE_3FV(GLfloat v[3])
}
/** Is float value negative? */
static inline GLboolean
IS_NEGATIVE(float x)
{
#if defined(USE_IEEE)
fi_type fi;
fi.f = x;
return fi.i < 0;
#else
return x < 0.0F;
#endif
}
/** Test two floats have opposite signs */
static inline GLboolean
DIFFERENT_SIGNS(GLfloat x, GLfloat y)
{
#if defined(USE_IEEE)
fi_type xfi, yfi;
xfi.f = x;
yfi.f = y;
return (xfi.i ^ yfi.i) & (1u << 31);
#else
/* Could just use (x*y<0) except for the flatshading requirements.
* Maybe there's a better way?
*/
return ((x) * (y) <= 0.0F && (x) - (y) != 0.0F);
#endif
}
/** Compute ceiling of integer quotient of A divided by B. */
#define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )