{"fofofofofoofofoffofoobarfoo", "foobars", -1},
	{"foofyfoobarfoobar", "y", 4},
	{"oooooooooooooooooooooo", "r", -1},
	{"oxoxoxoxoxoxoxoxoxoxoxoy", "oy", 22},
	{"oxoxoxoxoxoxoxoxoxoxoxox", "oy", -1},
	// test fallback to Rabin-Karp.
	{"000000000000000000000000000000000000000000000000000000000000000000000001", "0000000000000000000000000000000000000000000000000000000000000000001", 5},
}

var lastIndexTests = []BinOpTest{
	{"", "", 0},

			},
			outputs: []outputInfo{
				{0, 21503}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R12 R14
			},
		},
	},
	{
		name:   "RBIT",
		argLen: 1,
		asm:    arm.ARBIT,
		reg: regInfo{
			inputs: []inputInfo{
				{0, 22527}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 g R12 R14
			},
			outputs: []outputInfo{
				{0, 21503}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R12 R14
			},

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