BigInt, 128-bit number

[Nielsbishere]

• BigInt creation/destruction
• BigInt mul
• BigInt add
• BigInt sub
• BigInt div
• BigInt mod
• BigInt xor/or/and
• BigInt shift
• BigInt not
• BigInt compare
• BigInt min/max/clamp
• BigInt resize/set/copy
• BigInt trunc
• BigInt bitScan/isBase2
• BigInt to/from hex/bin/oct/nyto
• BigInt from dec
• BigInt to dec
• BigInt get buffer
• U128 creation
• U128 mul64
• Clean up U128 mul64
• U128 mul
• U128 xor/or/and
• U128 shift
• U128 mod
• U128 div
• U128 not
• U128 comparison
• U128 add
• U128 sub
• U128 min/max/clamp
• U128 bitScan/isBase
• U128 from string (BigInt)
• U128 to string (BigInt)
• U128 from text (BigInt)
• U128 optimization from string (dec/text)
• U128 optimization to string (dec)
• Profile U128 hw mul vs sw. Decide if more optimization needed.
• Add OxC3 profile for cmp, bitscan, sub, add, to/from string for U128 and BigInt.