type CounterFlavor uint8

const (
	// "Raw" representation: all values (pkg ID, func ID, num counters,
	// and counters themselves) are stored as uint32's.
	CtrRaw CounterFlavor = iota + 1

	// "ULeb" representation: all values (pkg ID, func ID, num counters,
	// and counters themselves) are stored with ULEB128 encoding.
	CtrULeb128
)

func Round4(x int) int {
	return (x + 3) &^ 3
}

	VPDI	$1, V2, V31, V1         // e712f0001284
	VLEG	$1, (R3), V1            // e71030001002
	VLEF	$2, (R0), V31           // e7f000002803
	VLEH	$3, (R12), V16          // e700c0003801
	VLEB	$15, 4095(R9), V15      // e7f09ffff000
	VSTEG	$1, V30, (R1)(R2*1)     // e7e21000180a
	VSTEF	$3, V2, (R9)            // e7209000300b
	VSTEH	$7, V31, (R2)           // e7f020007809

      CHECK-NEXT: %{{.*}} = arith.cmpi "eq", %x, %y : i64
      CHECK-NEXT: %{{.*}} = arith.cmpi "ult", %x, %y : i64
      CHECK-NEXT: %{{.*}} = arith.cmpi "ule", %x, %y : i64
      CHECK-NEXT: %{{.*}} = arith.cmpi "ugt", %x, %y : i64
      CHECK-NEXT: %{{.*}} = arith.cmpi "uge", %x, %y : i64
      CHECK-NEXT: %{{.*}} = arith.cmpi "ne", %x, %y : i64

		{name: "NE", controls: 1},
		{name: "LT", controls: 1},
		{name: "LE", controls: 1},
		{name: "GT", controls: 1},
		{name: "GE", controls: 1},
		{name: "ULT", controls: 1},
		{name: "ULE", controls: 1},
		{name: "UGT", controls: 1},
		{name: "UGE", controls: 1},
		{name: "LTnoov", controls: 1}, // 'LT' but without honoring overflow
		{name: "LEnoov", controls: 1}, // 'LE' but without honoring overflow

		{name: "LE", controls: 1},
		{name: "GT", controls: 1},
		{name: "GE", controls: 1},
		{name: "OS", controls: 1},
		{name: "OC", controls: 1},
		{name: "ULT", controls: 1},
		{name: "ULE", controls: 1},
		{name: "UGT", controls: 1},
		{name: "UGE", controls: 1},
		{name: "EQF", controls: 1},
		{name: "NEF", controls: 1},
		{name: "ORD", controls: 1}, // FP, ordered comparison (parity zero)