73b491b792
With normal SIB, index == 4 indicates no index. With VSIB, there is no exception for VR4/VR12. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2474 Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Link: https://lore.kernel.org/r/20240805003130.1421051-3-richard.henderson@linaro.org Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> (cherry picked from commit ac63755b20013ec6a3d2aef4538d37dc90bc3d10) Signed-off-by: Michael Tokarev <mjt@tls.msk.ru> (Mjt: modify the change to pre-new-decoder introduced past qemu 9.0)