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| author | Ian Lance Taylor <ian@gcc.gnu.org> | 2013-02-07 21:40:10 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2013-02-07 21:40:10 +0000 |
| commit | af4acefcd7e0187bdf4471b9bbb731b2757c0698 (patch) | |
| tree | 7191a7b9e309d011a21d1585a551658470376170 /libgo | |
| parent | f11c7048b94d6d0c1a37f1e765fc17a69734daec (diff) | |
| download | gcc-af4acefcd7e0187bdf4471b9bbb731b2757c0698.zip gcc-af4acefcd7e0187bdf4471b9bbb731b2757c0698.tar.gz gcc-af4acefcd7e0187bdf4471b9bbb731b2757c0698.tar.bz2 | |
re PR go/56173 (Several libgo tests FAIL on Solaris/SPARC)
PR go/56173
crypto/md5: fix for big-endian processors
From-SVN: r195867
Diffstat (limited to 'libgo')
| -rw-r--r-- | libgo/go/crypto/md5/md5block.go | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/libgo/go/crypto/md5/md5block.go b/libgo/go/crypto/md5/md5block.go index 59f8f6f..0ca4217 100644 --- a/libgo/go/crypto/md5/md5block.go +++ b/libgo/go/crypto/md5/md5block.go @@ -5,6 +5,16 @@ import ( "unsafe" ) +const x86 = runtime.GOARCH == "amd64" || runtime.GOARCH == "386" + +var littleEndian bool + +func init() { + x := uint32(0x04030201) + y := [4]byte{0x1, 0x2, 0x3, 0x4} + littleEndian = *(*[4]byte)(unsafe.Pointer(&x)) == y +} + func block(dig *digest, p []byte) { a := dig.s[0] b := dig.s[1] @@ -16,13 +26,13 @@ func block(dig *digest, p []byte) { aa, bb, cc, dd := a, b, c, d // This is a constant condition - it is not evaluated on each iteration. - if runtime.GOARCH == "amd64" || runtime.GOARCH == "386" { + if x86 { // MD5 was designed so that x86 processors can just iterate // over the block data directly as uint32s, and we generate // less code and run 1.3x faster if we take advantage of that. // My apologies. X = (*[16]uint32)(unsafe.Pointer(&p[0])) - } else if uintptr(unsafe.Pointer(&p[0]))&(unsafe.Alignof(uint32(0))-1) == 0 { + } else if littleEndian && uintptr(unsafe.Pointer(&p[0]))&(unsafe.Alignof(uint32(0))-1) == 0 { X = (*[16]uint32)(unsafe.Pointer(&p[0])) } else { X = &xbuf |