contract C {
    function shl(uint256 a, uint256 b) public returns (uint256 c) {
        assembly {
            c := shl(b, a)
        }
    }

    function shr(uint256 a, uint256 b) public returns (uint256 c) {
        assembly {
            c := shr(b, a)
        }
    }

    function sar(uint256 a, uint256 b) public returns (uint256 c) {
        assembly {
            c := sar(b, a)
        }
    }
}
// ====
// EVMVersion: >=constantinople
// ----
// shl(uint256,uint256): 0x01, 0x02 -> 0x04
// shl(uint256,uint256): 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, 0x01 -> 0xfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe
// shl(uint256,uint256): 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, 0x100 -> 0x00
// shr(uint256,uint256): 0x03, 0x01 -> 0x01
// shr(uint256,uint256): 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, 0x01 -> 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
// shr(uint256,uint256): 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, 0xff -> 0x01
// shr(uint256,uint256): 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, 0x100 -> 0x00
// sar(uint256,uint256): 0x03, 0x01 -> 0x01
// sar(uint256,uint256): 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, 0x01 -> 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
// sar(uint256,uint256): 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, 0xff -> 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
// sar(uint256,uint256): 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, 0x100 -> 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff