Fix off-by-one error (and missing store op)
Fix off-by-one error (and missing store op)

zig-lang/zig,zig-lang/zig,raulgrell/zig,andrewrk/zig,raulgrell/zig,raulgrell/zig,raulgrell/zig,zig-lang/zig,andrewrk/zig,raulgrell/zig