On 09.08.2022 00:37, Timo Rothenpieler wrote:
The entire support for the format is removed from swscale in this case,
so the function ending up empty doesn't matter.
I'll see if it can be added to half2float, but I can't even tell if it
implements ieee floats, or something else.
Did a very straight forward implementation with unions:
static uint32_t half2float(uint16_t h, const uint32_t *mantissatable, const
uint32_t *exponenttable,
const uint16_t *offsettable)
{
#if HAVE_FLOAT16
union {
uint16_t i;
_Float16 f;
} u16;
union {
uint32_t i;
float f;
} u32;
u16.i = h;
u32.f = u16.f;
return u32.i;
#else
uint32_t f;
f = mantissatable[offsettable[h >> 10] + (h & 0x3ff)] + exponenttable[h >>
10];
return f;
#endif
}
Unfortunately, this makes all exr fate tests fail with differing output
checksums.
At least the checksums match between f16c SIMD version and fallback sse2
implementation.
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