i965/fs: Add support for non-shadow textureGrad (TXD) on Ivybridge.

This is somewhat ugly, but I couldn't think of a nicer way to handle the
interleaved coordinate/derivative parameter loading.

Ironlake and Sandybridge will still hit an assertion in visit().

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
2 files changed