The << operator is a binary (infix) bitwise SHIFT LEFT operator. The << operator expects an integer right hand operand and an integer left hand operand. If either operand is a string, it will be automatically coerced to an integer before the SHIFT LEFT operator is applied.NOTE:
The two '<' characters in the SHIFT LEFT operator must occure in the assembler source without and interveaning blanks or they will be interpreted as two individual LESS THAN operators.syntax: <left_expr> << <right_expr><left_expr> and <right_expr> are refered to as the left and right operand respectively and may themselves be simple values or complex expressions.
e.g. 0x1234 << 4 yields 0x12340 0x1234 << 2 yields 0x48D0 (0x1204 + 0x0052) << 8 yields 0x125600