evm_signextend

Scalar function

EVM SIGNEXTEND opcode: Sign-extend x from byte k. Byte k is 0-indexed from LSB. Extends sign bit through higher bytes. Returns x unchanged if k >= 31.

Overloads

evm_signextend(BIGINT, UINT256)

evm_signextend(BIGINT, UINT256)

Parameters

Name	Type
k	BIGINT
x	UINT256

Returns

Name	Type
result	UINT256

SELECT evm_signextend(0, '0xFF'::UINT256); -- Returns 0xFFFF...FF

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