tvm-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From GitBox <...@apache.org>
Subject [GitHub] [incubator-tvm] sergei-grechanik commented on a change in pull request #5171: [Arith] linear system and equation solver
Date Wed, 08 Apr 2020 16:17:26 GMT
sergei-grechanik commented on a change in pull request #5171: [Arith] linear system and equation
solver
URL: https://github.com/apache/incubator-tvm/pull/5171#discussion_r405647242
 
 

 ##########
 File path: python/tvm/arith/int_solver.py
 ##########
 @@ -0,0 +1,99 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+"""integer constraints data structures and solvers"""
+import tvm._ffi
+from tvm.runtime import Object
+from . import _ffi_api
+
+
+@tvm._ffi.register_object("arith.IntConstraints")
+class IntConstraints(Object):
+    """Represent a set of integer constraints including variables, their ranges and
+       the relations between them (either equations or inequalities)
+
+    Parameters
+    ----------
+    variables : List[tvm.tir.Var]
+        The variables in the constraints. Must be integers
+    ranges    : Map[tvm.tir.Var, tvm.ir.Range]
+        The ranges of the variables.
+    relations : List[tvm.ir.PrimExpr]
+        The relations between the variables (either equations or inequalities)
+    """
+    def __init__(self, variables, ranges, relations):
+        self.__init_handle_by_constructor__(
+            _ffi_api.IntConstraints, variables, ranges, relations)
+
+
+@tvm._ffi.register_object("arith.IntConstraintsTransform")
+class IntConstraintsTransform(Object):
+    """We can have different set of variables to represent the same integer constraints.
+       For example, the following two constrains are equivalent,
+       {a + b = 0 | a >= 0, b >= 0} and
+       {m - n = 0 | m >= 0, n <= 0}
+       This data structure represents the transformation
+       between two equivalent integer constraints.
+       In the above example,
+       src        : {a + b = 0 | a >= 0, b >= 0}
+       dst        : {m - n = 0 | m >= 0, n <= 0}
+       src_to_dst : {a -> m, b -> -n}
+       dst_to_src : {m -> a, n -> -b}
+
+    Parameters
+    ----------
+    src : arith.IntConstraints
+        source integer constraints, e.g., {a + b = 0 | a >= 0, b >= 0}
+    dst : arith.IntConstraints
+        integer constraints equivalent to the source, e.g., {m - n = 0 | m >= 0, n <=
0}
+    src_to_dst : Map[tvm.tir.Var, tvm.ir.PrimExpr]
+        mapping from variables in the src to the variables in the dst,
+                e.g., {a -> m, b -> -n}
+    dst_to_src : Map[tvm.tir.Var, tvm.ir.PrimExpr]
+        mapping from variables in the dst to the variables in the src,
+        e.g., {m -> a, n -> -b}
+    """
+    def __init__(self, src, dst, src_to_dst, dst_to_src):
+        self.__init_handle_by_constructor__(
+            _ffi_api.IntConstraintsTransform, src, dst, src_to_dst, dst_to_src)
+
+
+def solve_linear_equations(equations, variables, ranges):
 
 Review comment:
   defaults: `variables=None, ranges=None` (and mark them as optional in the docstring)
   
   And may be add a test for this mode of calling

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
users@infra.apache.org


With regards,
Apache Git Services

Mime
View raw message