// license that can be found in the LICENSE file.

package main

const B32 = 1<<32 - 1
const C32 = (-1) & ((1 << 32) - 1)
const D32 = ^0

func main() {
	if B32 != 0xFFFFFFFF {
		println("1<<32 - 1 is", B32, "should be", 0xFFFFFFFF)
		panic("fail")
	}
	if C32 != 0xFFFFFFFF {
		println("(-1) & ((1<<32) - 1) is", C32, "should be", 0xFFFFFFFF)
		panic("fail")
	}
	if D32 != -1 {
		println("^0 is", D32, "should be", -1)

		default:
		}

		go i32receiver(c32, sync)
		try := 0
	Send32:
		for {
			select {
			case c32 <- 123:
				break Send32
			default:
				try++
				if try > maxTries {
					println("i32receiver buffer=", buffer)
					panic("fail")
				}
				sleep()
			}
		}
		<-sync

		go i32sender(c32, sync)
		if buffer > 0 {
			<-sync
		}
		try = 0

	c22  = c21 * c21
	c23  = c22 * c22
	c24  = c23 * c23
	c25  = c24 * c24
	c26  = c25 * c25
	c27  = c26 * c26
	c28  = c27 * c27
	c29  = c28 * c28
	c30  = c29 * c29
	c31  = c30 * c30
	c32  = c31 * c31
	c33  = c32 * c32
	c34  = c33 * c33
	c35  = c34 * c34
	c36  = c35 * c35
	c37  = c36 * c36
	c38  = c37 * c37
	c39  = c38 * c38
	c40  = c39 * c39
	c41  = c40 * c40
	c42  = c41 * c41
	c43  = c42 * c42

	c8 := uint64(0x00ff00ff00ff00ff)
	a := x >> 8 & c8
	b := (x & c8) << 8
	x = a | b
	c16 := uint64(0x0000ffff0000ffff)
	a = x >> 16 & c16
	b = (x & c16) << 16
	x = a | b
	c32 := uint64(0x00000000ffffffff)
	a = x >> 32 & c32
	b = (x & c32) << 32
	x = a | b
	return x
}

// Bswap32 returns its input with byte order reversed
// 0x01020304 -> 0x04030201
func Bswap32(x uint32) uint32 {
	c8 := uint32(0x00ff00ff)

//
// This function's execution time does not depend on the inputs.
func Add(x, y, carry uint) (sum, carryOut uint) {
	if UintSize == 32 {
		s32, c32 := Add32(uint32(x), uint32(y), uint32(carry))
		return uint(s32), uint(c32)
	}
	s64, c64 := Add64(uint64(x), uint64(y), uint64(carry))
	return uint(s64), uint(c64)
}

// Add32 returns the sum with carry of x, y and carry: sum = x + y + carry.

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