Intel 253666-024US - Manual (Page 120)

3-74 Vol. 2A BSWAP—Byte Swap
INSTRUCTION SET REFERENCE, A-M
DEST[15:8] ← TEMP[23:16];
DEST[23:16] ← TEMP[15:8];
DEST[31:24] ← TEMP[7:0];
FI;
Flags Affected
None.
Exceptions (All Operating Modes)
#UD If the LOCK prefix is used.