forked from M-Labs/artiq
compiler: interleave transform
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115
artiq/compiler/interleave.py
Normal file
115
artiq/compiler/interleave.py
Normal file
@ -0,0 +1,115 @@
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import ast, types
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from artiq.language import units
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from artiq.compiler.tools import eval_ast
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# -1 statement duration could not be pre-determined
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# 0 statement has no effect on timeline
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# >0 statement is a static delay that advances the timeline
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# by the given amount (in base_s_unit)
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def _get_duration(stmt):
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if isinstance(stmt, (ast.Expr, ast.Assign)):
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return _get_duration(stmt.value)
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elif isinstance(stmt, ast.If):
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if all(_get_duration(s) == 0 for s in stmt.body) and all(_get_duration(s) == 0 for s in stmt.orelse):
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return 0
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else:
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return -1
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elif isinstance(stmt, ast.Call) and isinstance(stmt.func, ast.Name):
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name = stmt.func.id
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if name == "delay":
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da = stmt.args[0]
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if isinstance(da, ast.Call) \
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and isinstance(da.func, ast.Name) \
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and da.func.id == "Quantity" \
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and isinstance(da.args[0], ast.Num):
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if not isinstance(da.args[1], ast.Name) or da.args[1].id != "base_s_unit":
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raise units.DimensionError("Delay not expressed in seconds")
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return da.args[0].n
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else:
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return -1
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else:
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return 0
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else:
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return 0
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def _interleave_timelines(timelines):
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r = []
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current_stmts = []
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for stmts in timelines:
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it = iter(stmts)
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try:
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stmt = next(it)
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except StopIteration:
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pass
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else:
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current_stmts.append(types.SimpleNamespace(delay=_get_duration(stmt), stmt=stmt, it=it))
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while current_stmts:
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dt = min(stmt.delay for stmt in current_stmts)
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print("\n".join("{} -> {}".format(ast.dump(stmt.stmt), stmt.delay) for stmt in current_stmts))
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print("")
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if dt < 0:
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# contains statement(s) with indeterminate duration
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return None
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if dt > 0:
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# advance timeline by dt
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for stmt in current_stmts:
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stmt.delay -= dt
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if stmt.delay == 0:
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ref_stmt = stmt.stmt
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da_expr = ast.copy_location(
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ast.Call(func=ast.Name("Quantity", ast.Load()),
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args=[ast.Num(dt), ast.Name("base_s_unit", ast.Load())],
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keywords=[], starargs=[], kwargs=[]),
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ref_stmt)
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delay_stmt = ast.copy_location(
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ast.Expr(ast.Call(func=ast.Name("delay", ast.Load()),
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args=[da_expr],
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keywords=[], starargs=[], kwargs=[])),
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ref_stmt)
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r.append(delay_stmt)
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else:
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for stmt in current_stmts:
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if stmt.delay == 0:
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r.append(stmt.stmt)
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# discard executed statements
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exhausted_list = []
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for stmt_i, stmt in enumerate(current_stmts):
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if stmt.delay == 0:
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try:
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stmt.stmt = next(stmt.it)
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except StopIteration:
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exhausted_list.append(stmt_i)
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else:
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stmt.delay = _get_duration(stmt.stmt)
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for offset, i in enumerate(exhausted_list):
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current_stmts.pop(i-offset)
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return r
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def interleave(stmts):
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replacements = []
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for stmt_i, stmt in enumerate(stmts):
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if isinstance(stmt, (ast.For, ast.While, ast.If)):
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interleave(stmt.body)
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interleave(stmt.orelse)
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elif isinstance(stmt, ast.With):
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btype = stmt.items[0].context_expr.id
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if btype == "sequential":
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interleave(stmt.body)
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replacements.append((stmt_i, stmt.body))
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elif btype == "parallel":
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timelines = [[s] for s in stmt.body]
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for timeline in timelines:
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interleave(timeline)
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merged = _interleave_timelines(timelines)
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if merged is not None:
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replacements.append((stmt_i, merged))
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else:
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raise ValueError("Unknown block type: " + btype)
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offset = 0
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for location, new_stmts in replacements:
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stmts[offset+location:offset+location+1] = new_stmts
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offset += len(new_stmts) - 1
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@ -1,203 +0,0 @@
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import inspect, textwrap, ast, types
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from artiq.language import units
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from artiq.compiler import unparse
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from artiq.compiler.tools import eval_ast
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def find_kernel_body(node):
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while True:
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if isinstance(node, ast.Module):
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if len(node.body) != 1:
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raise TypeError
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node = node.body[0]
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elif isinstance(node, ast.FunctionDef):
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return node.body
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else:
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raise TypeError
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def _try_eval_with_units(node):
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try:
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r = eval_ast(node, units.__dict__)
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except:
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return node
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if isinstance(r, units.Quantity):
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return ast.copy_location(ast.Num(n=r.amount), node)
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else:
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return node
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def explicit_delays(stmts):
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insertions = []
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for i, stmt in enumerate(stmts):
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if isinstance(stmt, (ast.For, ast.While, ast.If)):
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explicit_delays(stmt.body)
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explicit_delays(stmt.orelse)
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elif isinstance(stmt, ast.With):
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explicit_delays(stmt.body)
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elif isinstance(stmt, ast.Expr):
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if not isinstance(stmt.value, ast.Call) or not isinstance(stmt.value.func, ast.Name):
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continue
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call = stmt.value
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name = call.func.id
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if name == "delay":
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call.args[0] = _try_eval_with_units(call.args[0])
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elif name == "pulse":
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call.func.id = "pulse_start"
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insertions.append((i+1, ast.copy_location(
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ast.Expr(ast.Call(func=ast.Name(id="delay", ctx=ast.Load()),
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args=[_try_eval_with_units(call.args[2])],
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keywords=[], starargs=[], kwargs=[])),
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stmt)))
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for i, (location, stmt) in enumerate(insertions):
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stmts.insert(location+i, stmt)
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def _count_stmts(node):
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if isinstance(node, (ast.For, ast.While, ast.If)):
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print(ast.dump(node))
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return 1 + _count_stmts(node.body) + _count_stmts(node.orelse)
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elif isinstance(node, ast.With):
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return 1 + _count_stmts(node.body)
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elif isinstance(node, list):
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return sum(map(_count_stmts, node))
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else:
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return 1
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def unroll_loops(stmts, limit):
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replacements = []
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for stmt_i, stmt in enumerate(stmts):
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if isinstance(stmt, ast.For):
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try:
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it = eval_ast(stmt.iter)
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except:
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pass
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else:
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unroll_loops(stmt.body, limit)
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unroll_loops(stmt.orelse, limit)
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l_it = len(it)
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if l_it:
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n = l_it*_count_stmts(stmt.body)
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if n < limit:
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replacement = []
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for i in it:
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if not isinstance(i, int):
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replacement = None
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break
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replacement.append(ast.copy_location(
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ast.Assign(targets=[stmt.target], value=ast.Num(n=i)), stmt))
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replacement += stmt.body
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if replacement is not None:
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replacements.append((stmt_i, replacement))
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else:
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replacements.append((stmt_i, stmt.orelse))
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if isinstance(stmt, (ast.While, ast.If)):
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unroll_loops(stmt.body, limit)
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unroll_loops(stmt.orelse, limit)
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elif isinstance(stmt, ast.With):
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unroll_loops(stmt.body, limit)
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offset = 0
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for location, new_stmts in replacements:
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stmts[offset+location:offset+location+1] = new_stmts
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offset += len(new_stmts) - 1
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# -1 statement duration could not be pre-determined
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# 0 statement has no effect on timeline
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# >0 statement is a static delay that advances the timeline by the given amount
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def _get_duration(stmt):
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if isinstance(stmt, (ast.Expr, ast.Assign)):
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return _get_duration(stmt.value)
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elif isinstance(stmt, ast.Call) and isinstance(stmt.func, ast.Name):
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name = stmt.func.id
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if name == "delay":
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if isinstance(stmt.args[0], ast.Num):
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return stmt.args[0].n
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else:
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return -1
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elif name == "wait_edge":
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return -1
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else:
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return 0
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else:
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return -1
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def _merge_timelines(timelines):
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r = []
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current_stmts = []
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for stmts in timelines:
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it = iter(stmts)
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try:
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stmt = next(it)
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except StopIteration:
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pass
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else:
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current_stmts.append(types.SimpleNamespace(delay=_get_duration(stmt), stmt=stmt, it=it))
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while current_stmts:
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dt = min(stmt.delay for stmt in current_stmts)
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if dt < 0:
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# contains statement(s) with indeterminate duration
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return None
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if dt > 0:
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# advance timeline by dt
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for stmt in current_stmts:
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stmt.delay -= dt
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if stmt.delay == 0:
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ref_stmt = stmt.stmt
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delay_stmt = ast.copy_location(
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ast.Expr(ast.Call(func=ast.Name(id="delay", ctx=ast.Load()),
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args=[ast.Num(n=dt)],
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keywords=[], starargs=[], kwargs=[])),
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ref_stmt)
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r.append(delay_stmt)
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else:
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for stmt in current_stmts:
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if stmt.delay == 0:
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r.append(stmt.stmt)
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# discard executed statements
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exhausted_list = []
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for stmt_i, stmt in enumerate(current_stmts):
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if stmt.delay == 0:
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try:
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stmt.stmt = next(stmt.it)
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except StopIteration:
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exhausted_list.append(stmt_i)
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else:
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stmt.delay = _get_duration(stmt.stmt)
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for offset, i in enumerate(exhausted_list):
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current_stmts.pop(i-offset)
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return r
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def collapse(stmts):
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replacements = []
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for stmt_i, stmt in enumerate(stmts):
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if isinstance(stmt, (ast.For, ast.While, ast.If)):
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collapse(stmt.body)
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collapse(stmt.orelse)
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elif isinstance(stmt, ast.With):
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btype = stmt.items[0].context_expr.id
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if btype == "sequential":
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collapse(stmt.body)
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replacements.append((stmt_i, stmt.body))
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elif btype == "parallel":
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timelines = [[s] for s in stmt.body]
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for timeline in timelines:
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collapse(timeline)
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merged = _merge_timelines(timelines)
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if merged is not None:
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replacements.append((stmt_i, merged))
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else:
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raise ValueError("Unknown block type: " + btype)
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offset = 0
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for location, new_stmts in replacements:
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stmts[offset+location:offset+location+1] = new_stmts
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offset += len(new_stmts) - 1
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def transform(k_function, k_args, k_kwargs):
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node = ast.parse(textwrap.dedent(inspect.getsource(k_function)))
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node = find_kernel_body(node)
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explicit_delays(node)
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unroll_loops(node, 50)
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collapse(node)
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unparse.Unparser(node)
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@ -3,6 +3,7 @@ from operator import itemgetter
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from artiq.compiler.inline import inline
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from artiq.compiler.fold_constants import fold_constants
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from artiq.compiler.unroll_loops import unroll_loops
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from artiq.compiler.interleave import interleave
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from artiq.compiler.unparse import Unparser
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class Core:
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@ -10,6 +11,7 @@ class Core:
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stmts, rpc_map = inline(self, k_function, k_args, k_kwargs)
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fold_constants(stmts)
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unroll_loops(stmts, 50)
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interleave(stmts)
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print("=========================")
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print(" Inlined")
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@ -14,14 +14,14 @@ class CompilerTest(Experiment):
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@kernel
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def run(self, n, t2):
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t2 += 1*us
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for i in my_range(n):
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self.set_some_slowdev(i)
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delay(100*ms)
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with parallel:
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with sequential:
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self.a.pulse(100*MHz, 20*us)
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self.b.pulse(100*MHz, t2)
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for j in my_range(3):
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self.a.pulse((j+1)*100*MHz, 20*us)
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self.b.pulse(100*MHz, t2)
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with sequential:
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self.A.pulse(100*MHz, 10*us)
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self.B.pulse(100*MHz, t2)
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