video_core: fix infinity and NaN conversions
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4b8a7eb1ca
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@ -35,13 +35,19 @@ public:
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const int width = M + E + 1;
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const int bias = 128 - (1 << (E - 1));
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const int exponent = (hex >> M) & ((1 << E) - 1);
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int exponent = (hex >> M) & ((1 << E) - 1);
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const unsigned mantissa = hex & ((1 << M) - 1);
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const unsigned sign = (hex >> (E + M)) << 31;
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if (hex & ((1 << (width - 1)) - 1))
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hex = ((hex >> (E + M)) << 31) | (mantissa << (23 - M)) | ((exponent + bias) << 23);
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else
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hex = ((hex >> (E + M)) << 31);
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if (hex & ((1 << (width - 1)) - 1)) {
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if (exponent == (1 << E) - 1)
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exponent = 255;
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else
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exponent += bias;
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hex = sign | (mantissa << (23 - M)) | (exponent << 23);
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} else {
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hex = sign;
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}
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std::memcpy(&res.value, &hex, sizeof(float));
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