archive/tar, syscall: add statUnix for aix/ppc64

This commit add statUnix function for aix/ppc64. It also adds Unix
and Nano methods for AIX time structure.

Change-Id: I9fd62d34a47e87cd46f2f936cb736da0bdff7959
Reviewed-on: https://go-review.googlesource.com/c/163957
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

src/archive/tar/stat_actime1.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build linux dragonfly openbsd solaris
+// +build aix linux dragonfly openbsd solaris
 
 package tar
 

src/archive/tar/stat_unix.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build linux darwin dragonfly freebsd openbsd netbsd solaris
+// +build aix linux darwin dragonfly freebsd openbsd netbsd solaris
 
 package tar
 
@@ -54,6 +54,11 @@ func statUnix(fi os.FileInfo, h *Header) error {
 	if h.Typeflag == TypeChar || h.Typeflag == TypeBlock {
 		dev := uint64(sys.Rdev) // May be int32 or uint32
 		switch runtime.GOOS {
+		case "aix":
+			var major, minor uint32
+			major = uint32((dev & 0x3fffffff00000000) >> 32)
+			minor = uint32((dev & 0x00000000ffffffff) >> 0)
+			h.Devmajor, h.Devminor = int64(major), int64(minor)
 		case "linux":
 			// Copied from golang.org/x/sys/unix/dev_linux.go.
 			major := uint32((dev & 0x00000000000fff00) >> 8)

src/syscall/syscall_aix.go

@@ -28,6 +28,14 @@ const (
 	SYS_FCNTL
 )
 
+func (ts *StTimespec_t) Unix() (sec int64, nsec int64) {
+	return int64(ts.Sec), int64(ts.Nsec)
+}
+
+func (ts *StTimespec_t) Nano() int64 {
+	return int64(ts.Sec)*1e9 + int64(ts.Nsec)
+}
+
 /*
  * Wrapped
  */