New TimeSpan.From overloads which take integers

src/libraries/System.Linq.Expressions/tests/DebugViewTests.cs

@@ -316,7 +316,7 @@ public static void Call()
             Check(".Call $x.ToString()", Expression.Call(x, typeof(int).GetMethod("ToString", Type.EmptyTypes)));
             Check(".Call $s.Substring($x)", Expression.Call(s, typeof(string).GetMethod("Substring", new[] { typeof(int) }), x));
             Check(".Call $s.Substring(\\r\\n    $x,\\r\\n    $y)", Expression.Call(s, typeof(string).GetMethod("Substring", new[] { typeof(int), typeof(int) }), x, y));
-            Check(".Call System.TimeSpan.FromSeconds($d)", Expression.Call(null, typeof(TimeSpan).GetMethod("FromSeconds", new[] { typeof(int) }), d));
+            Check(".Call System.TimeSpan.FromSeconds($d)", Expression.Call(null, typeof(TimeSpan).GetMethod("FromSeconds", new[] { typeof(double) }), d));
         }
 
         [Fact]

src/libraries/System.Private.CoreLib/src/System/Math.cs

@@ -235,6 +235,16 @@ public static long BigMul(long a, long b, out long low)
             return (long)high - ((a >> 63) & b) - ((b >> 63) & a);
         }
 
+        /// <summary>Produces the full product of two 64-bit numbers.</summary>
+        /// <param name="a">The first number to multiply.</param>
+        /// <param name="b">The second number to multiply.</param>
+        /// <returns>The full product of the specified numbers.</returns>
+        internal static Int128 BigMul(long a, long b)
+        {
+            long high = Math.BigMul(a, b, out long low);
+            return new Int128((ulong)high, (ulong)low);
+        }
+
         public static double BitDecrement(double x)
         {
             ulong bits = BitConverter.DoubleToUInt64Bits(x);

src/libraries/System.Private.CoreLib/src/System/TimeSpan.cs

@@ -308,6 +308,149 @@ public TimeSpan Duration()
 
         public override int GetHashCode() => _ticks.GetHashCode();
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="TimeSpan"/> structure to a specified number of
+        /// days.
+        /// </summary>
+        /// <param name="days">Number of days.</param>
+        /// <returns>Returns a <see cref="TimeSpan"/> that represents a specified number of days.</returns>
+        /// <exception cref="ArgumentOutOfRangeException">
+        /// The parameters specify a <see cref="TimeSpan"/> value less than <see cref="MinValue"/> or greater than <see cref="MaxValue"/>
+        /// </exception>
+        public static TimeSpan FromDays(int days) => FromDays(days, 0);
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="TimeSpan"/> structure to a specified number of
+        /// days, hours, minutes, seconds, milliseconds, and microseconds.
+        /// </summary>
+        /// <param name="days">Number of days.</param>
+        /// <param name="hours">Number of hours.</param>
+        /// <param name="minutes">Number of minutes.</param>
+        /// <param name="seconds">Number of seconds.</param>
+        /// <param name="milliseconds">Number of milliseconds.</param>
+        /// <param name="microseconds">Number of microseconds.</param>
+        /// <returns>Returns a <see cref="TimeSpan"/> that represents a specified number of days, hours, minutes, seconds, milliseconds, and microseconds.</returns>
+        /// <exception cref="ArgumentOutOfRangeException">
+        /// The parameters specify a <see cref="TimeSpan"/> value less than <see cref="MinValue"/> or greater than <see cref="MaxValue"/>
+        /// </exception>
+        public static TimeSpan FromDays(int days, int hours = 0, long minutes = 0, long seconds = 0, long milliseconds = 0, long microseconds = 0)
+        {
+            Int128 totalMicroseconds = Math.BigMul(days, MicrosecondsPerDay)
+                                     + Math.BigMul(hours, MicrosecondsPerHour)
+                                     + Math.BigMul(minutes, MicrosecondsPerMinute)
+                                     + Math.BigMul(seconds, MicrosecondsPerSecond)
+                                     + Math.BigMul(milliseconds, MicrosecondsPerMillisecond)
+                                     + microseconds;
+
+            if ((totalMicroseconds > MaxMicroseconds) || (totalMicroseconds < MinMicroseconds))
+            {
+                ThrowHelper.ThrowArgumentOutOfRange_TimeSpanTooLong();
+            }
+            var ticks = (long)totalMicroseconds * TicksPerMicrosecond;
+            return TimeSpan.FromTicks(ticks);
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="TimeSpan"/> structure to a specified number of
+        /// hours.
+        /// </summary>
+        /// <param name="hours">Number of hours.</param>
+        /// <returns>Returns a <see cref="TimeSpan"/> that represents a specified number of hours.</returns>
+        /// <exception cref="ArgumentOutOfRangeException">
+        /// The parameters specify a <see cref="TimeSpan"/> value less than <see cref="MinValue"/> or greater than <see cref="MaxValue"/>
+        /// </exception>
+        public static TimeSpan FromHours(int hours) => FromDays(0, hours: hours);
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="TimeSpan"/> structure to a specified number of
+        /// hours, minutes, seconds, milliseconds, and microseconds.
+        /// </summary>
+        /// <param name="hours">Number of hours.</param>
+        /// <param name="minutes">Number of minutes.</param>
+        /// <param name="seconds">Number of seconds.</param>
+        /// <param name="milliseconds">Number of milliseconds.</param>
+        /// <param name="microseconds">Number of microseconds.</param>
+        /// <returns>Returns a <see cref="TimeSpan"/> that represents a specified number of hours, minutes, seconds, milliseconds, and microseconds.</returns>
+        /// <exception cref="ArgumentOutOfRangeException">
+        /// The parameters specify a <see cref="TimeSpan"/> value less than <see cref="MinValue"/> or greater than <see cref="MaxValue"/>
+        /// </exception>
+        public static TimeSpan FromHours(int hours, long minutes = 0, long seconds = 0, long milliseconds = 0, long microseconds = 0)
+            => FromDays(0, hours: hours, minutes: minutes, seconds: seconds, milliseconds: milliseconds, microseconds: microseconds);
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="TimeSpan"/> structure to a specified number of
+        /// minutes.
+        /// </summary>
+        /// <param name="minutes">Number of minutes.</param>
+        /// <returns>Returns a <see cref="TimeSpan"/> that represents a specified number of minutes.</returns>
+        /// <exception cref="ArgumentOutOfRangeException">
+        /// The parameters specify a <see cref="TimeSpan"/> value less than <see cref="MinValue"/> or greater than <see cref="MaxValue"/>
+        /// </exception>
+        public static TimeSpan FromMinutes(long minutes) => FromDays(0, minutes: minutes);
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="TimeSpan"/> structure to a specified number of
+        /// minutes, seconds, milliseconds, and microseconds.
+        /// </summary>
+        /// <param name="minutes">Number of minutes.</param>
+        /// <param name="seconds">Number of seconds.</param>
+        /// <param name="milliseconds">Number of milliseconds.</param>
+        /// <param name="microseconds">Number of microseconds.</param>
+        /// <returns>Returns a <see cref="TimeSpan"/> that represents a specified number of minutes, seconds, milliseconds, and microseconds.</returns>
+        /// <exception cref="ArgumentOutOfRangeException">
+        /// The parameters specify a <see cref="TimeSpan"/> value less than <see cref="MinValue"/> or greater than <see cref="MaxValue"/>
+        /// </exception>
+        public static TimeSpan FromMinutes(long minutes, long seconds = 0, long milliseconds = 0, long microseconds = 0)
+            => FromDays(0, minutes: minutes, seconds: seconds, milliseconds: milliseconds, microseconds: microseconds);
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="TimeSpan"/> structure to a specified number of
+        /// seconds.
+        /// </summary>
+        /// <param name="seconds">Number of seconds.</param>
+        /// <returns>Returns a <see cref="TimeSpan"/> that represents a specified number of seconds.</returns>
+        /// <exception cref="ArgumentOutOfRangeException">
+        /// The parameters specify a <see cref="TimeSpan"/> value less than <see cref="MinValue"/> or greater than <see cref="MaxValue"/>
+        /// </exception>
+        public static TimeSpan FromSeconds(long seconds) => FromDays(0, seconds: seconds);
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="TimeSpan"/> structure to a specified number of
+        /// seconds, milliseconds, and microseconds.
+        /// </summary>
+        /// <param name="seconds">Number of seconds.</param>
+        /// <param name="milliseconds">Number of milliseconds.</param>
+        /// <param name="microseconds">Number of microseconds.</param>
+        /// <returns>Returns a <see cref="TimeSpan"/> that represents a specified number of seconds, milliseconds, and microseconds.</returns>
+        /// <exception cref="ArgumentOutOfRangeException">
+        /// The parameters specify a <see cref="TimeSpan"/> value less than <see cref="MinValue"/> or greater than <see cref="MaxValue"/>
+        /// </exception>
+        public static TimeSpan FromSeconds(long seconds, long milliseconds = 0, long microseconds = 0)
+            => FromDays(0, seconds: seconds, milliseconds: milliseconds, microseconds: microseconds);
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="TimeSpan"/> structure to a specified number of
+        /// milliseconds, and microseconds.
+        /// </summary>
+        /// <param name="milliseconds">Number of milliseconds.</param>
+        /// <param name="microseconds">Number of microseconds.</param>
+        /// <returns>Returns a <see cref="TimeSpan"/> that represents a specified number of milliseconds, and microseconds.</returns>
+        /// <exception cref="ArgumentOutOfRangeException">
+        /// The parameters specify a <see cref="TimeSpan"/> value less than <see cref="MinValue"/> or greater than <see cref="MaxValue"/>
+        /// </exception>
+        public static TimeSpan FromMilliseconds(long milliseconds, long microseconds = 0) => FromDays(0, milliseconds: milliseconds, microseconds: microseconds);
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="TimeSpan"/> structure to a specified number of
+        /// microseconds.
+        /// </summary>
+        /// <param name="microseconds">Number of microseconds.</param>
+        /// <returns>Returns a <see cref="TimeSpan"/> that represents a specified number of microseconds.</returns>
+        /// <exception cref="ArgumentOutOfRangeException">
+        /// The parameters specify a <see cref="TimeSpan"/> value less than <see cref="MinValue"/> or greater than <see cref="MaxValue"/>
+        /// </exception>
+        public static TimeSpan FromMicroseconds(long microseconds) => FromDays(0, microseconds: microseconds);
+
         public static TimeSpan FromHours(double value) => Interval(value, TicksPerHour);
 
         private static TimeSpan Interval(double value, double scale)

src/libraries/System.Runtime/ref/System.Runtime.cs

@@ -5613,6 +5613,16 @@ protected TimeProvider() { }
         public override bool Equals([System.Diagnostics.CodeAnalysis.NotNullWhenAttribute(true)] object? value) { throw null; }
         public bool Equals(System.TimeSpan obj) { throw null; }
         public static bool Equals(System.TimeSpan t1, System.TimeSpan t2) { throw null; }
+        public static System.TimeSpan FromDays(int days) { throw null; }
+        public static System.TimeSpan FromDays(int days, int hours = 0, long minutes = 0, long seconds = 0, long milliseconds = 0, long microseconds = 0) { throw null; }
+        public static System.TimeSpan FromHours(int hours) { throw null; }
+        public static System.TimeSpan FromHours(int hours, long minutes = 0, long seconds = 0, long milliseconds = 0, long microseconds = 0) { throw null; }
+        public static System.TimeSpan FromMinutes(long minutes) { throw null; }
+        public static System.TimeSpan FromMinutes(long minutes, long seconds = 0, long milliseconds = 0, long microseconds = 0) { throw null; }
+        public static System.TimeSpan FromSeconds(long seconds) { throw null; }
+        public static System.TimeSpan FromSeconds(long seconds, long milliseconds = 0, long microseconds = 0) { throw null; }
+        public static System.TimeSpan FromMilliseconds(long milliseconds, long microseconds = 0) { throw null; }
+        public static System.TimeSpan FromMicroseconds(long microseconds) { throw null; }
         public static System.TimeSpan FromDays(double value) { throw null; }
         public static System.TimeSpan FromHours(double value) { throw null; }
         public static System.TimeSpan FromMicroseconds(double value) { throw null; }