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Drop unused and unportable "fast math" code

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sfan5
2021-07-16 23:52:26 +02:00
parent 22c3219ff0
commit 1d66c921c2
3 changed files with 2 additions and 252 deletions
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74
source/Irrlicht/irrMathFastCompat.h
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@ -24,33 +24,7 @@ namespace core
// Input -1.40129846e-45, expected -1, got 0
REALINLINE s32 floor32_fast(f32 x)
{
#ifdef IRRLICHT_FAST_MATH
const f32 h = 0.5f;
s32 t;
#if defined(_MSC_VER) && !defined(_WIN64)
__asm
{
fld x
fsub h
fistp t
}
#elif defined(__GNUC__)
__asm__ __volatile__ (
"fsub %2 \n\t"
"fistpl %0"
: "=m" (t)
: "t" (x), "f" (h)
: "st"
);
#else
return (s32) floorf ( x );
#endif
return t;
#else // no fast math
return (s32) floorf ( x );
#endif
}
// Some examples for unexpected results when using this with IRRLICHT_FAST_MATH:
@ -59,33 +33,7 @@ namespace core
// Input -3, expected -3, got -2
REALINLINE s32 ceil32_fast ( f32 x )
{
#ifdef IRRLICHT_FAST_MATH
const f32 h = 0.5f;
s32 t;
#if defined(_MSC_VER) && !defined(_WIN64)
__asm
{
fld x
fadd h
fistp t
}
#elif defined(__GNUC__)
__asm__ __volatile__ (
"fadd %2 \n\t"
"fistpl %0 \n\t"
: "=m"(t)
: "t"(x), "f"(h)
: "st"
);
#else
return (s32) ceilf ( x );
#endif
return t;
#else // not fast math
return (s32) ceilf ( x );
#endif
}
// Some examples for unexpected results when using this with IRRLICHT_FAST_MATH:
@ -95,29 +43,7 @@ namespace core
// Input -2.80259693e-45, expected -nan(ind), got -inf
REALINLINE s32 round32_fast(f32 x)
{
#if defined(IRRLICHT_FAST_MATH)
s32 t;
#if defined(_MSC_VER) && !defined(_WIN64)
__asm
{
fld x
fistp t
}
#elif defined(__GNUC__)
__asm__ __volatile__ (
"fistpl %0 \n\t"
: "=m"(t)
: "t"(x)
: "st"
);
#else
return (s32) round_(x);
#endif
return t;
#else // no fast math
return (s32) round_(x);
#endif
}
} // end namespace core