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compiler: lower time transform

This commit is contained in:
Sebastien Bourdeauducq 2014-07-15 11:22:11 -06:00
parent 17fab6f024
commit 591509d31b
2 changed files with 45 additions and 0 deletions

View File

@ -0,0 +1,42 @@
import ast
class _TimeLowerer(ast.NodeTransformer):
def __init__(self, ref_period):
self.ref_period = ref_period
def visit_Call(self, node):
if isinstance(node.func, ast.Name) \
and node.func.id == "Quantity" and node.args[1].id == "base_s_unit":
return ast.copy_location(
ast.BinOp(left=node.args[0], op=ast.FloorDiv(), right=ast.Num(self.ref_period.amount)),
node)
elif isinstance(node.func, ast.Name) and node.func.id == "now":
return ast.copy_location(ast.Name("now", ast.Load()), node)
else:
self.generic_visit(node)
return node
def visit_Expr(self, node):
self.generic_visit(node)
if isinstance(node.value, ast.Call) and isinstance(node.value.func, ast.Name):
funcname = node.value.func.id
if funcname == "delay":
return ast.copy_location(
ast.AugAssign(target=ast.Name("now", ast.Store()), op=ast.Add(), value=node.value.args[0]),
node)
elif funcname == "at":
return ast.copy_location(
ast.Assign(targets=[ast.Name("now", ast.Store())], value=node.value.args[0]),
node)
else:
return node
else:
return node
def lower_time(stmts, ref_period):
transformer = _TimeLowerer(ref_period)
new_stmts = [transformer.visit(stmt) for stmt in stmts]
new_stmts.insert(0, ast.copy_location(
ast.Assign(targets=[ast.Name("now", ast.Store())], value=ast.Num(0)),
stmts[0]))
stmts[:] = new_stmts

View File

@ -2,6 +2,7 @@ from artiq.compiler.inline import inline
from artiq.compiler.fold_constants import fold_constants
from artiq.compiler.unroll_loops import unroll_loops
from artiq.compiler.interleave import interleave
from artiq.compiler.lower_time import lower_time
from artiq.compiler.ir import get_runtime_binary
class Core:
@ -16,6 +17,8 @@ class Core:
fold_constants(stmts)
unroll_loops(stmts, 50)
interleave(stmts)
lower_time(stmts, self.runtime_env.ref_period)
fold_constants(stmts)
binary = get_runtime_binary(self.runtime_env, stmts)
self.core_com.run(binary)