SRLW	$1, X6					// 1b531300
	SUBW	$1, X6					// 1b03f3ff
	SRAW	$1, X6					// 1b531340

	// 5.3: Load and Store Instructions (RV64I)
	LD	(X5), X6				// 03b30200
	LD	4(X5), X6				// 03b34200
	SD	X5, (X6)				// 23305300
	SD	X5, 4(X6)				// 23325300

	// 7.1: Multiplication Operations
	MUL	X5, X6, X7				// b3035302
	MULH	X5, X6, X7				// b3135302
	MULHU	X5, X6, X7				// b3335302
	MULHSU	X5, X6, X7				// b3235302

	SLLIW	$-1, X5, X6			// ERROR "immediate out of range 0 to 31"
	SRLIW	$-1, X5, X6			// ERROR "immediate out of range 0 to 31"
	SRAIW	$-1, X5, X6			// ERROR "immediate out of range 0 to 31"
	SD	X5, 4294967296(X6)		// ERROR "constant 4294967296 too large"
	SRLI	$1, X5, F1			// ERROR "expected integer register in rd position but got non-integer register F1"

	{"Mixed", makeFieldsInput()},
}

func BenchmarkFields(b *testing.B) {
	for _, sd := range bytesdata {
		b.Run(sd.name, func(b *testing.B) {
			for j := 1 << 4; j <= 1<<20; j <<= 4 {
				b.Run(fmt.Sprintf("%d", j), func(b *testing.B) {
					b.ReportAllocs()
					b.SetBytes(int64(j))
					data := sd.data[:j]
					for i := 0; i < b.N; i++ {
						Fields(data)
					}
				})
			}
		})