// [Index] creation time is O(N) for N = len(data).
func New(data []byte) *Index {
	ix := &Index{data: data}
	if len(data) <= maxData32 {
		ix.sa.int32 = make([]int32, len(data))
		text_32(data, ix.sa.int32)
	} else {
		ix.sa.int64 = make([]int64, len(data))
		text_64(data, ix.sa.int64)
	}
	return ix
}

// writeInt writes an int x to w using buf to buffer the write.
func writeInt(w io.Writer, buf []byte, x int) error {

Russ Cox <******@****.***> 1488850797 -0500

Russ Cox <******@****.***> 1649017278 -0400

Russ Cox <******@****.***> 1649017278 -0400

	test32(-0.0)
	test32(x0)
	test32(x1)
	test32(x2)
	test32(x3)

	if f := -y0; f != 0 || !math.Signbit(f) {
		println("BUG: got", f, "want -0.0")
	}

	test64(-0.0)
	test64(y0)
	test64(y1)
	test64(y2)
	test64(y3)

	}
	if len(a) <= len(b) {
		atomic.AddInt64(&cnt64, 16)
	}
	return atomic.LoadInt64(&cnt64) == 31
}

func main() {
	if !test32([]int{}, []int{}) {
		panic("test32")
	}
	if !test64([]int{}, []int{}) {
		panic("test64")
	}

	test32(float32(m1011p149), f32(m1011p149))
	test32(float32(m1100p149), f32(m1100p149))

	test64(float64(m0000p1074), f64(m0000p1074))
	test64(float64(m1000p1074), f64(m1000p1074))
	test64(float64(m1001p1074), f64(m1001p1074))
	test64(float64(m1011p1074), f64(m1011p1074))
	test64(float64(m1100p1074), f64(m1100p1074))
}

func f32(x float64) float32 { return float32(x) }

These binaries were generated by:

$ cat empty.s
.global _start
_start:
$ as --32 -o empty.o empty.s && ld  --build-id -m elf_i386 -o test32 empty.o
$ as --64 -o empty.o empty.s && ld --build-id -o test64 empty.o
$ powerpc-linux-gnu-as -o empty.o empty.s && powerpc-linux-gnu-ld --build-id -o test32be empty.o

	return x &^ c64a
}

// Note: x-c gets rewritten to x+(-c), so SUB and SBC are not directly testable.
// I disabled that rewrite rule before running this test.

func main() {
	test32()
	test64()
}

func test32() {
	var a uint32 = 0x11111111
	var want, got uint32
	if want, got = a+c32a, add32a(a); got != want {
		panic(fmt.Sprintf("add32a(%x) = %x, want %x", a, got, want))
	}

}

// AtomicVariables is the set of global variables on which we perform
// 64-bit atomic operations.
var AtomicVariables = []unsafe.Pointer{
	unsafe.Pointer(&ncgocall),
	unsafe.Pointer(&test_z64),
	unsafe.Pointer(&blockprofilerate),
	unsafe.Pointer(&mutexprofilerate),
	unsafe.Pointer(&gcController),
	unsafe.Pointer(&memstats),
	unsafe.Pointer(&sched),
	unsafe.Pointer(&ticks),
	unsafe.Pointer(&work),