// A = Ua*a + Va*b
	// B = Ub*a + Vb*b
	Ua := new(Int).SetInt64(1)
	Va := new(Int)

	Ub := new(Int)
	Vb := new(Int).SetInt64(1)

	q := new(Int)
	temp := new(Int)

	r := new(Int)
	for len(B.abs) > 0 {
		q, r = q.QuoRem(A, B, r)

		A, B, r = B, r, A

		// Ua, Ub = Ub, Ua-q*Ub
		temp.Set(Ub)
		Ub.Mul(Ub, q)
		Ub.Sub(Ua, Ub)
		Ua.Set(temp)

00000190  2b 2b 24 23 77 5b 1c 3b  bd 75 5d ce 20 54 cf a1  |++$#w[.;.u]. T..|
000001a0  63 87 1d 1e 24 c4 f3 1d  1a 50 8b aa b6 14 43 ed  |c...$....P....C.|
000001b0  97 a7 75 62 f4 14 c8 52  d7 02 03 01 00 01 a3 46  |..ub...R.......F|
000001c0  30 44 30 0e 06 03 55 1d  0f 01 01 ff 04 04 03 02  |0D0...U.........|
000001d0  05 a0 30 13 06 03 55 1d  25 04 0c 30 0a 06 08 2b  |..0...U.%..0...+|

00000160  d9 2b 2b 24 23 77 5b 1c  3b bd 75 5d ce 20 54 cf  |.++$#w[.;.u]. T.|
00000170  a1 63 87 1d 1e 24 c4 f3  1d 1a 50 8b aa b6 14 43  |.c...$....P....C|
00000180  ed 97 a7 75 62 f4 14 c8  52 d7 02 03 01 00 01 a3  |...ub...R.......|
00000190  81 93 30 81 90 30 0e 06  03 55 1d 0f 01 01 ff 04  |..0..0...U......|
000001a0  04 03 02 05 a0 30 1d 06  03 55 1d 25 04 16 30 14  |.....0...U.%..0.|

00000160  d9 2b 2b 24 23 77 5b 1c  3b bd 75 5d ce 20 54 cf  |.++$#w[.;.u]. T.|
00000170  a1 63 87 1d 1e 24 c4 f3  1d 1a 50 8b aa b6 14 43  |.c...$....P....C|
00000180  ed 97 a7 75 62 f4 14 c8  52 d7 02 03 01 00 01 a3  |...ub...R.......|
00000190  81 93 30 81 90 30 0e 06  03 55 1d 0f 01 01 ff 04  |..0..0...U......|
000001a0  04 03 02 05 a0 30 1d 06  03 55 1d 25 04 16 30 14  |.....0...U.%..0.|

		amount.SetScale(amount.Scale() + Scale(exponent).infScale())
	} else if base == 2 {
		// numericSuffix = 2 ** exponent
		numericSuffix := big.NewInt(1).Lsh(bigOne, uint(exponent))
		ub := amount.UnscaledBig()
		amount.SetUnscaledBig(ub.Mul(ub, numericSuffix))
	}

	// Cap at min/max bounds.
	sign := amount.Sign()
	if sign == -1 {
		amount.Neg(amount)
	}

00000160  9f 6c 61 3c c0 b0 41 d4  d9 2b 2b 24 23 77 5b 1c  |.la<..A..++$#w[.|
00000170  3b bd 75 5d ce 20 54 cf  a1 63 87 1d 1e 24 c4 f3  |;.u]. T..c...$..|
00000180  1d 1a 50 8b aa b6 14 43  ed 97 a7 75 62 f4 14 c8  |..P....C...ub...|
00000190  52 d7 02 03 01 00 01 a3  81 93 30 81 90 30 0e 06  |R.........0..0..|
000001a0  03 55 1d 0f 01 01 ff 04  04 03 02 05 a0 30 1d 06  |.U...........0..|

00000160  d9 2b 2b 24 23 77 5b 1c  3b bd 75 5d ce 20 54 cf  |.++$#w[.;.u]. T.|
00000170  a1 63 87 1d 1e 24 c4 f3  1d 1a 50 8b aa b6 14 43  |.c...$....P....C|
00000180  ed 97 a7 75 62 f4 14 c8  52 d7 02 03 01 00 01 a3  |...ub...R.......|
00000190  81 93 30 81 90 30 0e 06  03 55 1d 0f 01 01 ff 04  |..0..0...U......|
000001a0  04 03 02 05 a0 30 1d 06  03 55 1d 25 04 16 30 14  |.....0...U.%..0.|

00000160  d9 2b 2b 24 23 77 5b 1c  3b bd 75 5d ce 20 54 cf  |.++$#w[.;.u]. T.|
00000170  a1 63 87 1d 1e 24 c4 f3  1d 1a 50 8b aa b6 14 43  |.c...$....P....C|
00000180  ed 97 a7 75 62 f4 14 c8  52 d7 02 03 01 00 01 a3  |...ub...R.......|
00000190  81 93 30 81 90 30 0e 06  03 55 1d 0f 01 01 ff 04  |..0..0...U......|
000001a0  04 03 02 05 a0 30 1d 06  03 55 1d 25 04 16 30 14  |.....0...U.%..0.|

00000160  d9 2b 2b 24 23 77 5b 1c  3b bd 75 5d ce 20 54 cf  |.++$#w[.;.u]. T.|
00000170  a1 63 87 1d 1e 24 c4 f3  1d 1a 50 8b aa b6 14 43  |.c...$....P....C|
00000180  ed 97 a7 75 62 f4 14 c8  52 d7 02 03 01 00 01 a3  |...ub...R.......|
00000190  81 93 30 81 90 30 0e 06  03 55 1d 0f 01 01 ff 04  |..0..0...U......|
000001a0  04 03 02 05 a0 30 1d 06  03 55 1d 25 04 16 30 14  |.....0...U.%..0.|

00000160  9f 6c 61 3c c0 b0 41 d4  d9 2b 2b 24 23 77 5b 1c  |.la<..A..++$#w[.|
00000170  3b bd 75 5d ce 20 54 cf  a1 63 87 1d 1e 24 c4 f3  |;.u]. T..c...$..|
00000180  1d 1a 50 8b aa b6 14 43  ed 97 a7 75 62 f4 14 c8  |..P....C...ub...|
00000190  52 d7 02 03 01 00 01 a3  81 93 30 81 90 30 0e 06  |R.........0..0..|
000001a0  03 55 1d 0f 01 01 ff 04  04 03 02 05 a0 30 1d 06  |.U...........0..|