The result of converting true to uint does not match the behavior in solc.

[Subway2023]

Version: v0.3.3: Atlantis

contract C {
    function f() public returns (uint x) {
        assembly {
            x := true
        }
    }
}

Reproduction: I set up a Solang compilation and execution environment to test the program.

solang/target/debug/vmRunNoPara test.sol C f

The execution result from solang+svm:

0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff

The execution result from solc+evm(remix):

0x0000000000000000000000000000000000000000000000000000000000000001