44 lines
1.2 KiB
C#
44 lines
1.2 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Runtime.CompilerServices;
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using System.Text;
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namespace System
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{
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internal static class FloatEx
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{
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static unsafe bool IsFinite(double d)
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{
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long bits = BitConverter.DoubleToInt64Bits(d);
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return (bits & 0x7FFFFFFFFFFFFFFF) < 0x7FF0000000000000;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static unsafe bool IsNegative(double d)
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{
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return BitConverter.DoubleToInt64Bits(d) < 0;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static bool IsFinite(float f)
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{
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int bits = SingleToInt32Bits(f);
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return (bits & 0x7FFFFFFF) < 0x7F800000;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static unsafe bool IsNegative(float f)
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{
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return SingleToInt32Bits(f) < 0;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static unsafe int SingleToInt32Bits(float value)
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{
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return *((int*)&value);
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}
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}
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}
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