suzerain: #2979 towards debugging 00 case

Think I've got a root cause isolated, namely that
I failed to account for the action of the final
row of the BSMBSM submatrices when accumulating
the matrix for assembly.

Testing that out will require some monkeying about,
so here's a snapshot of the in-progress work.

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@43956 0bd85f0b-c151-43b9-a1e9-27231104551f
suzerain: #2979 rholut_imexop00 NRBC consistency

After much hassle, the forward and inverse operators for rholut_imexop00
match both with and without an upper NRBC matrix.

suzerain: cheaper suzerain_blas_zgb_acc_d

Dunno why I was using the more complicated method here.

suzerain: #2979 properly scale buffer

This uses the known assembly details of the buffer to
effectively scale the last diagonal by (1 - c[i][j])
prior to adding the mass matrix into it and then packing.
Has nicer stride properties than earlier attempts.

suzerain: inline the 5x5 matvec

suzerain: {rho_E, rho_E} back online

suzerain: brevity

suzerain: reintroduce non-unit phi

suzerain: rho_E, rho_U off-diagonal

suzerain: remove unnecessary PTR #define

suzerain: formatting

suzerain: correct transpose

I mislead myself in the prior commit.

suzerain: fix inconsistency

suzerain: remove explicit unroll

suzerain: avoid temporary for diagonal

suzerain: rho_E rho_E fully active

suzerain: enable rho_u, rhou_u entries

These remove the misguided SWAPCMPX nonsense

suzerain: enable rho_v, rho_v

suzerain: enable rho_w, rho_w

suzerain: rho, rho active

Though it was before, too.

suzerain: enable rho_E, rho_u

suzerain: activate rho_E, {rho_v, rho_w, rho}

suzerain: remove LIKELY

There's enough going on here without annotations,
and presumably the runtime or PGO can figure this
out quite well.

suzerain: remove unused constant

suzerain: activate entire rho_u equation

suzerain: rho_V, rho_E

Here, the consistency in the approach breaks down
as submatrix (rho_v, rho_E) now requires a separate
copy operation prior to the accumulate.

suzerain: finish rho_v equation

suzerain: activate rho_w equation

suzerain: activate rho equation

Also, remove useless "Zero fill" comments.

suzerain: add TODO

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@43957 0bd85f0b-c151-43b9-a1e9-27231104551f