Bug swiftshader:2

Change-Id: I43c55f948a0816cf062b9b2e9d158c9a52fafdbc
Reviewed-on: https://swiftshader-review.googlesource.com/6930Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>