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Remove NaN checks

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This commit is contained in:
Jean-Marc Valin 2019-03-20 13:36:42 -04:00
parent a09815925a
commit a8fb25f11c
2 changed files with 1 additions and 26 deletions
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16
dnn/arch.h
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@ -157,22 +157,6 @@ typedef float celt_sig;
typedef float celt_norm;
typedef float celt_ener;
#ifdef FLOAT_APPROX
/* This code should reliably detect NaN/inf even when -ffast-math is used.
Assumes IEEE 754 format. */
static OPUS_INLINE int celt_isnan(float x)
{
union {float f; opus_uint32 i;} in;
in.f = x;
return ((in.i>>23)&0xFF)==0xFF && (in.i&0x007FFFFF)!=0;
}
#else
#ifdef __FAST_MATH__
#error Cannot build libopus with -ffast-math unless FLOAT_APPROX is defined. This could result in crashes on extreme (e.g. NaN) input
#endif
#define celt_isnan(x) ((x)!=(x))
#endif
#define Q15ONE 1.0f
#define NORM_SCALING 1.f

11
dnn/vec.h
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@ -52,22 +52,13 @@ static float tansig_approx(float x)
int i;
float y, dy;
float sign=1;
/* Tests are reversed to catch NaNs */
if (!(x<8))
return 1;
if (!(x>-8))
return -1;
#ifndef FIXED_POINT
/* Another check in case of -ffast-math */
if (celt_isnan(x))
return 0;
#endif
if (x<0)
{
x=-x;
sign=-1;
}
i = (int)floor(.5f+25*x);
i = IMAX(0, IMIN(200, i));
x -= .04f*i;
y = tansig_table[i];
dy = 1-y*y;