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;--- test SHL operator .model small .386 .data .code mov edx, -1 SHL 8 ; mov edx, (-1 SHL 8) SHR 8 ;won't work with Masm v8+/JWasm v2.06+ ; mov edx, 0FFFFFFFFh SHL 8 ;won't work with Masm v8+/JWasm v2.06+ mov edx, (0FFFFFFFFh SHL 8) SHR 8 ret END