/usr/share/go-1.8/test/intrinsic.dir/main.go is in golang-1.8-src 1.8.3-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 | // Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"fmt"
T "runtime/internal/sys"
)
var A = []uint64{0x0102030405060708, 0x1122334455667788}
var B = []uint64{0x0807060504030201, 0x8877665544332211}
var errors int
func logf(f string, args ...interface{}) {
errors++
fmt.Printf(f, args...)
if errors > 100 { // 100 is enough spewage
panic("100 errors is plenty is enough")
}
}
func test(i, x uint64) {
t := T.Ctz64(x) // ERROR "intrinsic substitution for Ctz64"
if i != t {
logf("Ctz64(0x%x) expected %d but got %d\n", x, i, t)
}
x = -x
t = T.Ctz64(x) // ERROR "intrinsic substitution for Ctz64"
if i != t {
logf("Ctz64(0x%x) expected %d but got %d\n", x, i, t)
}
if i <= 32 {
x32 := uint32(x)
t32 := T.Ctz32(x32) // ERROR "intrinsic substitution for Ctz32"
if uint32(i) != t32 {
logf("Ctz32(0x%x) expected %d but got %d\n", x32, i, t32)
}
x32 = -x32
t32 = T.Ctz32(x32) // ERROR "intrinsic substitution for Ctz32"
if uint32(i) != t32 {
logf("Ctz32(0x%x) expected %d but got %d\n", x32, i, t32)
}
}
}
func main() {
// Test Bswap first because the other test relies on it
// working correctly (to implement bit reversal).
for i := range A {
x := A[i]
y := B[i]
X := T.Bswap64(x) // ERROR "intrinsic substitution for Bswap64"
Y := T.Bswap64(y) // ERROR "intrinsic substitution for Bswap64"
if y != X {
logf("Bswap64(0x%08x) expected 0x%08x but got 0x%08x\n", x, y, X)
}
if x != Y {
logf("Bswap64(0x%08x) expected 0x%08x but got 0x%08x\n", y, x, Y)
}
x32 := uint32(X)
y32 := uint32(Y >> 32)
X32 := T.Bswap32(x32) // ERROR "intrinsic substitution for Bswap32"
Y32 := T.Bswap32(y32) // ERROR "intrinsic substitution for Bswap32"
if y32 != X32 {
logf("Bswap32(0x%08x) expected 0x%08x but got 0x%08x\n", x32, y32, X32)
}
if x32 != Y32 {
logf("Bswap32(0x%08x) expected 0x%08x but got 0x%08x\n", y32, x32, Y32)
}
}
// Zero is a special case, be sure it is done right.
if T.Ctz32(0) != 32 { // ERROR "intrinsic substitution for Ctz32"
logf("ctz32(0) != 32")
}
if T.Ctz64(0) != 64 { // ERROR "intrinsic substitution for Ctz64"
logf("ctz64(0) != 64")
}
for i := uint64(0); i <= 64; i++ {
for j := uint64(1); j <= 255; j += 2 {
for k := uint64(1); k <= 65537; k += 128 {
x := (j * k) << i
test(i, x)
}
}
}
}
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