Bug swiftshader:69

Change-Id: Ib4611e2326741688969137f0610980f899b8ee48
Reviewed-on: https://swiftshader-review.googlesource.com/11148Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>