Support matrix stack overflow/underflow errors.

Change-Id: Ie3caee1128c8227397a74378fcefdf9e128fc6bf
Reviewed-on: https://swiftshader-review.googlesource.com/3761
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>
3 files changed