diff options
| -rw-r--r-- | lib/Target/README.txt | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index 7285c1b068..19bd9d137d 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -287,6 +287,22 @@ unsigned int swap_32(unsigned int v) { return v; } +Nor is this: + +ushort %bad(ushort %a) { +entry: + %tmp = cast ushort %a to uint ; <uint> [#uses=1] + %tmp2 = shr uint %tmp, ubyte 8 ; <uint> [#uses=1] + %tmp2 = cast uint %tmp2 to ushort ; <ushort> [#uses=1] + %tmp5 = shl ushort %a, ubyte 8 ; <ushort> [#uses=1] + %tmp6 = or ushort %tmp2, %tmp5 ; <ushort> [#uses=1] + ret ushort %tmp6 +} + +unsigned short bad(unsigned short a) { + return ((a & 0xff00) >> 8 | (a & 0x00ff) << 8); +} + //===---------------------------------------------------------------------===// These should turn into single 16-bit (unaligned?) loads on little/big endian |