diff options
Diffstat (limited to 'libgo/go/runtime/alg.go')
| -rw-r--r-- | libgo/go/runtime/alg.go | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/libgo/go/runtime/alg.go b/libgo/go/runtime/alg.go index 0daddf1..f96a75d 100644 --- a/libgo/go/runtime/alg.go +++ b/libgo/go/runtime/alg.go @@ -235,6 +235,9 @@ func ifaceeq(x, y iface) bool { panic(errorString("comparing uncomparable type " + t.string())) } if isDirectIface(t) { + // Direct interface types are ptr, chan, map, func, and single-element structs/arrays thereof. + // Maps and funcs are not comparable, so they can't reach here. + // Ptrs, chans, and single-element items can be compared directly using ==. return x.data == y.data } return eq(x.data, y.data) @@ -291,6 +294,7 @@ func efacevaleq(x eface, t *_type, p unsafe.Pointer) bool { panic(errorString("comparing uncomparable type " + t.string())) } if isDirectIface(t) { + // See comment in efaceeq. return x.data == p } return eq(x.data, p) @@ -420,3 +424,21 @@ func initAlgAES() { // Initialize with random data so hash collisions will be hard to engineer. getRandomData(aeskeysched[:]) } + +// Note: These routines perform the read with an native endianness. +func readUnaligned32(p unsafe.Pointer) uint32 { + q := (*[4]byte)(p) + if sys.BigEndian { + return uint32(q[3]) | uint32(q[2])<<8 | uint32(q[1])<<16 | uint32(q[0])<<24 + } + return uint32(q[0]) | uint32(q[1])<<8 | uint32(q[2])<<16 | uint32(q[3])<<24 +} + +func readUnaligned64(p unsafe.Pointer) uint64 { + q := (*[8]byte)(p) + if sys.BigEndian { + return uint64(q[7]) | uint64(q[6])<<8 | uint64(q[5])<<16 | uint64(q[4])<<24 | + uint64(q[3])<<32 | uint64(q[2])<<40 | uint64(q[1])<<48 | uint64(q[0])<<56 + } + return uint64(q[0]) | uint64(q[1])<<8 | uint64(q[2])<<16 | uint64(q[3])<<24 | uint64(q[4])<<32 | uint64(q[5])<<40 | uint64(q[6])<<48 | uint64(q[7])<<56 +} |