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39 lines
713 B
C++
39 lines
713 B
C++
#include "Types.h"
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#include "R3DFloat.h"
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float R3DFloat::GetFloat16(UINT16 f)
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{
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return ToFloat(Convert16BitProFloat(f));
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}
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float R3DFloat::GetFloat32(UINT32 f)
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{
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return ToFloat(ConvertProFloat(f));
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}
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UINT32 R3DFloat::ConvertProFloat(UINT32 a1)
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{
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int exponent = (a1 & 0x7E000000) >> 25;
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if (exponent <= 31) { // positive
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exponent += 127;
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}
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else { // negative exponent
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exponent -= 64;
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exponent += 127;
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}
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int mantissa = (a1 & 0x1FFFFFF) >> 2;
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return (a1 & 0x80000000) | (exponent << 23) | mantissa;
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}
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UINT32 R3DFloat::Convert16BitProFloat(UINT32 a1)
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{
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return ConvertProFloat(a1 << 15);
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}
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float R3DFloat::ToFloat(UINT32 a1)
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{
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return *(float*)(&a1);
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} |