Added README and final touches for now

QuadrupleLib/Float128.cs

@@ -205,6 +205,34 @@ public static Float128 Floor(Float128 value)
             return result;
         }
 
+        public static Float128 Ceiling(Float128 value)
+        {
+            Float128 result;
+            int unbiasedExponent = value.Exponent;
+
+            if (unbiasedExponent == short.MaxValue) result = value; //NaN, +inf, -inf
+            else if (unbiasedExponent < 0)
+            {
+                if (value.RawSignBit)
+                {
+                    result = 0;
+                }
+                else
+                {
+                    result = 1;
+                }
+            }
+            else
+            {
+                result = value;
+                int bitsToErase = 112 - unbiasedExponent;
+                result.RawSignificand &= ~((UInt128.One << bitsToErase) - 1);
+                if (value.RawSignBit) result += 1;
+            }
+
+            return result;
+        }
+
         #endregion
 
         #region Public API (complex number related)

README.md

@@ -0,0 +1,19 @@
+# QuadrupleLib
+
+QuadrupleLib is a modern implementation of the IEEE 754 `binary128` floating point number type for .NET 7 and above based on the `UInt128` built-in. The goal of this project is to eventually create a fully fleshed out 128-bit floating point arithmetic library that includes all of the bells and whistles one could possibly want. 
+
+### Project TODOs
+
+- [x] Adheres to minimum requirements of IEEE 754 specification
+- [x] Partially implements .NET 7 `ISignedNumber` generic arithmetic interface
+- [x] Implements all basic arithmetic operations (`+`, `-`, `*`, `/`, `%`, `++`, `--`)
+- [x] Implements all standard rounding functions (`Round`, `Floor`, `Ceiling`)
+- [x] Implements basic `ToString` and `Parse`/`TryParse` methods
+- [x] Implements conversion methods to & from `binary64` type
+- [x] Provides conversion pathways to all standard .NET number types via `binary64`
+- [ ] Implements `IEEERemainder` as suggested in IEEE 754
+- [ ] Implements typical library functions (`Pow`, `Atan2`, `Log`)
+- [ ] Supports all rounding modes (atm only implements "ties to even" mode)
+- [ ] Supports .NET Core formatting features for `ToString` and `Parse`
+- [ ] Implements .NET 7 `IBinaryFloatingPointIeee754` generic arithmetic interface
+