Your ignorance of firearms is of monumental proportions.
First, the term "semi-automatic" refers to extracting and ejecting the spent cartridge case from the weapon's firing chamber, re-cocking the firing mechanism, and loading a new cartridge into the firing chamber while requiring a trigger pull for each firing. Neither a single action nor a double action revolver is a semi-automatic weapon. The empty cartridge shells must be ejected manually, for one reason.
Contrary to what you said, the M1 Garand was, indeed, a semi-automatic weapon. It was the first such weapon for our armed forces, introduced in 1937.