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47 lines
No EOL
1.2 KiB
C#
47 lines
No EOL
1.2 KiB
C#
using System;
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namespace Ryujinx.Graphics.Shader.Translation.Optimizations
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{
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static class HalfConversion
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{
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public static float HalfToSingle(int value)
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{
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int mantissa = (value >> 0) & 0x3ff;
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int exponent = (value >> 10) & 0x1f;
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int sign = (value >> 15) & 0x1;
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if (exponent == 0x1f)
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{
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// NaN or Infinity.
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mantissa <<= 13;
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exponent = 0xff;
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}
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else if (exponent != 0 || mantissa != 0 )
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{
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if (exponent == 0)
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{
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// Denormal.
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int e = -1;
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int m = mantissa;
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do
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{
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e++;
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m <<= 1;
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}
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while ((m & 0x400) == 0);
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mantissa = m & 0x3ff;
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exponent = e;
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}
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mantissa <<= 13;
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exponent = 127 - 15 + exponent;
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}
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int output = (sign << 31) | (exponent << 23) | mantissa;
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return BitConverter.Int32BitsToSingle(output);
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}
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}
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} |