nvc0/isa: Add fmz, handle reg+const src2/src3 combination correctly.
nvc0/isa: Add fmz, handle reg+const src2/src3 combination correctly.

grate-driver/envytools,grate-driver/envytools,grate-driver/envytools,karolherbst/envytools,MoochMcGee/envytools,kfractal/envytools,grate-driver/envytools,envytools/envytools,envytools/envytools,kfractal/envytools,karolherbst/envytools,hakzsam/envytools,pierremoreau/envytools,MoochMcGee/envytools,kfractal/envytools,karolherbst/envytools,hakzsam/envytools,hakzsam/envytools,kfractal/envytools,envytools/envytools,MoochMcGee/envytools,pierremoreau/envytools,karolherbst/envytools,envytools/envytools,pierremoreau/envytools,MoochMcGee/envytools,MoochMcGee/envytools,hakzsam/envytools,karolherbst/envytools,grate-driver/envytools,pierremoreau/envytools,envytools/envytools,hakzsam/envytools,pierremoreau/envytools,kfractal/envytools