Spv merge to spv 7

[steveri]

This pull is 7th in a series that so far includes #934 , #935 , #937 , #938 , #939 , #941 , slowly merging gf/onyx and tsmc/amber versions back into one, for a single common master branch.

After the most recent pull #941 , the two branches had 101 files difference between them. This pull cuts that down to 90:

official_dense_branch=origin/master-dense-tsmc-amber
official_sparse_branch=origin/spVspV
new_sparse_branch=spv-merge-to-spv-7

git diff $official_dense_branch $new_sparse_branch | egrep ^diff | wc -l
    90

Below is a summary of the changes included in this pull, along with an explanation of why each change should have no adverse impact on existing spVspV functionality.

1. Obviously, full-chip constraints for Onyx are very different than those for Amber builds. So I made a separate directory full_chip/constraints_amber/ for the older constraints and kept the existing directory full_chip/constraints/ for the (unchanged) onyx constraints as the default. This required two changes:

1a) Created a new directory mflowgen/full_chip/constraints_amber/ containing the files
:

    configure.yml
    cons_scripts/clocks_0_params.tcl
    cons_scripts/clocks_1_master.tcl
    cons_scripts/clocks_2_sys.tcl
    cons_scripts/clocks_3_tlx.tcl
    cons_scripts/clocks_4_cgra.tcl
    cons_scripts/clocks_5_periph.tcl
    cons_scripts/clocks_6_jtag.tcl
    cons_scripts/clocks_7_trace.tcl
    cons_scripts/clocks_8_xgcd.tcl
    cons_scripts/clocks_except_soc.tcl
    cons_scripts/constraints.tcl
    cons_scripts/design_context.tcl
    cons_scripts/design_info.tcl
    cons_scripts/garnet_constraints.tcl
    cons_scripts/io.tcl
    cons_scripts/pad_strength.tcl
    cons_scripts/tech_params.tcl

1b) Updated full_chip/construct.py to use the older constraints only when it detects that we are building with the amber process (tsmc16).

    diff --git a/mflowgen/full_chip/construct.py b/mflowgen/full_chip/construct.py
    @@ -180,7 +180,12 @@ def construct():
    -  constraints    = Step( this_dir + '/constraints'                            )
    +
    +  if adk_name == "tsmc16":
    +    constraints    = Step( this_dir + '/constraints_amber'                      )
    +  else:
    +    constraints    = Step( this_dir + '/constraints'                            )
    +

2. These changes have been vetted and have passed both amber full-chip build and onyx aha-flow CI tests.

• https://buildkite.com/tapeout-aha/fullchip/builds/485 (in progress, expeected to pass)
• https://buildkite.com/stanford-aha/aha-flow/builds/7851

[steveri]

There's something weird/wrong about this pull request, I'm suspending it until I can figure it out...