move DynamicPipe to nmutil

[ieee754fpu.git] / src / ieee754 / pipeline.py

diff --git a/src/ieee754/pipeline.py b/src/ieee754/pipeline.py
index 17cde15a721c6050eaa255bd44ab53290939ffc2..8a9c408ce1992d4f4c60e86190d0bec2c4c3238d 100644 (file)
--- a/src/ieee754/pipeline.py
+++ b/src/ieee754/pipeline.py
@@ -1,11 +1,8 @@
 # SPDX-License-Identifier: LGPL-2.1-or-later
 # See Notices.txt for copyright information
 
-from abc import ABCMeta
-from nmigen import Elaboratable
-
 from nmutil.singlepipe import SimpleHandshake
-import threading
+from nmutil.dynamicpipe import DynamicPipe, SimpleHandshakeRedir
 
 
 class PipelineSpec:
@@ -37,71 +34,3 @@ class PipelineSpec:
         self.fpformat = None
         self.n_comb_stages = None
 
-# with many thanks to jsbueno on stackexchange for this one
-# https://stackoverflow.com/questions/57273070/
-# list post:
-# http://lists.libre-riscv.org/pipermail/libre-riscv-dev/2019-July/002259.html
-
-class Meta(ABCMeta):
-    registry = {}
-    recursing = threading.local()
-    recursing.check = False
-    mlock = threading.Lock()
-
-    def __call__(cls, *args, **kw):
-        mcls = cls.__class__
-        if mcls.recursing.check:
-            return super().__call__(*args, **kw)
-        spec = args[0]
-        base = spec.pipekls # pick up the dynamic class from PipelineSpec, HERE
-
-        if (cls, base) not in mcls.registry:
-            print ("__call__", args, kw, cls, base,
-                   base.__bases__, cls.__bases__)
-            mcls.registry[cls, base] = type(
-                cls.__name__,
-                (cls, base) + cls.__bases__[1:],
-                {}
-            )
-        real_cls = mcls.registry[cls, base]
-
-        with mcls.mlock:
-            mcls.recursing.check = True
-            instance = real_cls.__class__.__call__(real_cls, *args, **kw)
-            mcls.recursing.check = False
-        return instance
-
-
-# Inherit from this class instead of SimpleHandshake (or other ControlBase
-# derivative), and the metaclass will instead *replace* DynamicPipe -
-# *at runtime* - with the class that is specified *as a parameter*
-# in PipelineSpec.
-#
-# as explained in the list posting and in the stackexchange post, this is
-# needed to avoid a MASSIVE suite of duplicated multiple-inheritance classes
-# that "Mix in" SimpleHandshake (or other).
-#
-# unfortunately, composition does not work in this instance
-# (make an *instance* of SimpleHandshake or other class and pass it in)
-# due to the multiple level inheritance, and in several places
-# the inheriting class needs to do some setup that the deriving class
-# needs in order to function correctly.
-
-class DynamicPipe(metaclass=Meta):
-    def __init__(self, *args):
-        print ("DynamicPipe init", super(), args)
-        super().__init__(self, *args)
-
-
-# bad hack: the DynamicPipe metaclass ends up creating an __init__ signature
-# for the dynamically-derived class.  luckily, SimpleHandshake only needs
-# "self" as the 1st argument (it is its own "Stage").  anything else
-# could hypothetically be passed through the pspec.
-class SimpleHandshakeRedir(SimpleHandshake):
-    def __init__(self, mod, *args):
-        print ("redir", mod, args)
-        stage = self
-        if args and args[0].stage:
-            stage = args[0].stage
-        SimpleHandshake.__init__(self, stage)
-