Implement {delay,now,at}{,_mu} and {mu,seconds}_to_{seconds,mu}.

artiq/compiler/builtins.py

@@ -138,6 +138,30 @@ def fn_print():
 def fn_kernel():
     return types.TBuiltinFunction("kernel")
 
+def fn_now():
+    return types.TBuiltinFunction("now")
+
+def fn_delay():
+    return types.TBuiltinFunction("delay")
+
+def fn_at():
+    return types.TBuiltinFunction("at")
+
+def fn_now_mu():
+    return types.TBuiltinFunction("now_mu")
+
+def fn_delay_mu():
+    return types.TBuiltinFunction("delay_mu")
+
+def fn_at_mu():
+    return types.TBuiltinFunction("at_mu")
+
+def fn_mu_to_seconds():
+    return types.TBuiltinFunction("mu_to_seconds")
+
+def fn_seconds_to_mu():
+    return types.TBuiltinFunction("seconds_to_mu")
+
 # Accessors
 
 def is_none(typ):

artiq/compiler/module.py

@@ -42,7 +42,7 @@ class Source:
             return cls(source.Buffer(f.read(), filename, 1), engine=engine)
 
 class Module:
-    def __init__(self, src):
+    def __init__(self, src, ref_period=1e-6):
         self.engine = src.engine
         self.object_map = src.object_map
 
@@ -51,7 +51,8 @@ class Module:
         monomorphism_validator = validators.MonomorphismValidator(engine=self.engine)
         escape_validator = validators.EscapeValidator(engine=self.engine)
         artiq_ir_generator = transforms.ARTIQIRGenerator(engine=self.engine,
-                                                         module_name=src.name)
+                                                         module_name=src.name,
+                                                         ref_period=ref_period)
         dead_code_eliminator = transforms.DeadCodeEliminator(engine=self.engine)
         local_access_validator = validators.LocalAccessValidator(engine=self.engine)
 

artiq/compiler/prelude.py

@@ -7,17 +7,34 @@ from . import builtins
 
 def globals():
     return {
+        # Value constructors
         "bool":                 builtins.fn_bool(),
         "int":                  builtins.fn_int(),
         "float":                builtins.fn_float(),
         "list":                 builtins.fn_list(),
         "range":                builtins.fn_range(),
+
+        # Exception constructors
         "Exception":            builtins.fn_Exception(),
         "IndexError":           builtins.fn_IndexError(),
         "ValueError":           builtins.fn_ValueError(),
         "ZeroDivisionError":    builtins.fn_ZeroDivisionError(),
+
+        # Built-in Python functions
         "len":                  builtins.fn_len(),
         "round":                builtins.fn_round(),
         "print":                builtins.fn_print(),
+
+        # ARTIQ decorators
         "kernel":               builtins.fn_kernel(),
+
+        # ARTIQ time management functions
+        "now":                  builtins.fn_now(),
+        "delay":                builtins.fn_delay(),
+        "at":                   builtins.fn_at(),
+        "now_mu":               builtins.fn_now_mu(),
+        "delay_mu":             builtins.fn_delay_mu(),
+        "at_mu":                builtins.fn_at_mu(),
+        "mu_to_seconds":        builtins.fn_mu_to_seconds(),
+        "seconds_to_mu":        builtins.fn_seconds_to_mu(),
     }

artiq/compiler/testbench/jit.py

@@ -5,9 +5,9 @@ from .. import Module, Source
 from ..targets import NativeTarget
 
 def main():
-    libartiq_personality = os.getenv('LIBARTIQ_PERSONALITY')
+    libartiq_support = os.getenv('LIBARTIQ_SUPPORT')
-    if libartiq_personality is not None:
+    if libartiq_support is not None:
-        llvm.load_library_permanently(libartiq_personality)
+        llvm.load_library_permanently(libartiq_support)
 
     def process_diagnostic(diag):
         print("\n".join(diag.render()))

artiq/compiler/transforms/artiq_ir_generator.py

@@ -67,10 +67,11 @@ class ARTIQIRGenerator(algorithm.Visitor):
 
     _size_type = builtins.TInt(types.TValue(32))
 
-    def __init__(self, module_name, engine):
+    def __init__(self, module_name, engine, ref_period):
         self.engine = engine
         self.functions = []
         self.name = [module_name] if module_name != "" else []
+        self.ref_period = ir.Constant(ref_period, builtins.TFloat())
         self.current_loc = None
         self.current_function = None
         self.current_class = None
@@ -1409,6 +1410,39 @@ class ARTIQIRGenerator(algorithm.Visitor):
             self.polymorphic_print([self.visit(arg) for arg in node.args],
                                    separator=" ", suffix="\n")
             return ir.Constant(None, builtins.TNone())
+        elif types.is_builtin(typ, "now"):
+            if len(node.args) == 0 and len(node.keywords) == 0:
+                now_mu = self.append(ir.Builtin("now_mu", [], builtins.TInt(types.TValue(64))))
+                now_mu_float = self.append(ir.Coerce(now_mu, builtins.TFloat()))
+                return self.append(ir.Arith(ast.Mult(loc=None), now_mu_float, self.ref_period))
+            else:
+                assert False
+        elif types.is_builtin(typ, "delay") or types.is_builtin(typ, "at"):
+            if len(node.args) == 1 and len(node.keywords) == 0:
+                arg = self.visit(node.args[0])
+                arg_mu_float = self.append(ir.Arith(ast.Div(loc=None), arg, self.ref_period))
+                arg_mu = self.append(ir.Coerce(arg_mu_float, builtins.TInt(types.TValue(64))))
+                self.append(ir.Builtin(typ.name + "_mu", [arg_mu], builtins.TNone()))
+            else:
+                assert False
+        elif types.is_builtin(typ, "now_mu") or types.is_builtin(typ, "delay_mu") \
+                or types.is_builtin(typ, "at_mu"):
+            return self.append(ir.Builtin(typ.name,
+                                          [self.visit(arg) for arg in node.args], node.type))
+        elif types.is_builtin(typ, "mu_to_seconds"):
+            if len(node.args) == 1 and len(node.keywords) == 0:
+                arg = self.visit(node.args[0])
+                arg_float = self.append(ir.Coerce(arg, builtins.TFloat()))
+                return self.append(ir.Arith(ast.Mult(loc=None), arg_float, self.ref_period))
+            else:
+                assert False
+        elif types.is_builtin(typ, "seconds_to_mu"):
+            if len(node.args) == 1 and len(node.keywords) == 0:
+                arg = self.visit(node.args[0])
+                arg_mu = self.append(ir.Arith(ast.Div(loc=None), arg, self.ref_period))
+                return self.append(ir.Coerce(arg_mu, builtins.TInt(types.TValue(64))))
+            else:
+                assert False
         elif types.is_exn_constructor(typ):
             return self.alloc_exn(node.type, *[self.visit(arg_node) for arg_node in node.args])
         elif types.is_constructor(typ):

artiq/compiler/transforms/inferencer.py

@@ -505,6 +505,17 @@ class Inferencer(algorithm.Visitor):
                 node.func.loc, notes=valid_forms)
             self.engine.process(diag)
 
+        def simple_form(info, arg_types=[], return_type=builtins.TNone()):
+            self._unify(node.type, return_type,
+                        node.loc, None)
+
+            if len(node.args) == len(arg_types) and len(node.keywords) == 0:
+                for index, arg_type in enumerate(arg_types):
+                    self._unify(node.args[index].type, arg_type,
+                                node.args[index].loc, None)
+            else:
+                diagnose([ valid_form(info) ])
+
         if types.is_exn_constructor(typ):
             valid_forms = lambda: [
                 valid_form("{exn}() -> {exn}".format(exn=typ.name)),
@@ -730,6 +741,30 @@ class Inferencer(algorithm.Visitor):
                 pass
             else:
                 diagnose(valid_forms())
+        elif types.is_builtin(typ, "now"):
+            simple_form("now() -> float",
+                        [], builtins.TFloat())
+        elif types.is_builtin(typ, "delay"):
+            simple_form("delay(time:float) -> None",
+                        [builtins.TFloat()])
+        elif types.is_builtin(typ, "at"):
+            simple_form("at(time:float) -> None",
+                        [builtins.TFloat()])
+        elif types.is_builtin(typ, "now_mu"):
+            simple_form("now_mu() -> int(width=64)",
+                        [], builtins.TInt(types.TValue(64)))
+        elif types.is_builtin(typ, "delay_mu"):
+            simple_form("delay_mu(time_mu:int(width=64)) -> None",
+                        [builtins.TInt(types.TValue(64))])
+        elif types.is_builtin(typ, "at_mu"):
+            simple_form("at_mu(time_mu:int(width=64)) -> None",
+                        [builtins.TInt(types.TValue(64))])
+        elif types.is_builtin(typ, "mu_to_seconds"):
+            simple_form("mu_to_seconds(time_mu:int(width=64)) -> float",
+                        [builtins.TInt(types.TValue(64))], builtins.TFloat())
+        elif types.is_builtin(typ, "seconds_to_mu"):
+            simple_form("seconds_to_mu(time:float) -> int(width=64)",
+                        [builtins.TFloat()], builtins.TInt(types.TValue(64)))
         elif types.is_constructor(typ):
             # An user-defined class.
             self._unify(node.type, typ.find().instance,

artiq/compiler/transforms/llvm_ir_generator.py

@@ -14,6 +14,7 @@ llvoid     = ll.VoidType()
 lli1       = ll.IntType(1)
 lli8       = ll.IntType(8)
 lli32      = ll.IntType(32)
+lli64      = ll.IntType(64)
 lldouble   = ll.DoubleType()
 llptr      = ll.IntType(8).as_pointer()
 llmetadata = ll.MetaData()
@@ -331,9 +332,9 @@ class LLVMIRGenerator:
             assert False
 
     def llbuiltin(self, name):
-        llfun = self.llmodule.get_global(name)
+        llglobal = self.llmodule.get_global(name)
-        if llfun is not None:
+        if llglobal is not None:
-            return llfun
+            return llglobal
 
         if name in "llvm.donothing":
             llty = ll.FunctionType(llvoid, [])
@@ -366,13 +367,19 @@ class LLVMIRGenerator:
                                    var_arg=True)
         elif name == "recv_rpc":
             llty = ll.FunctionType(lli32, [llptr])
+        elif name == "now":
+            llty = lli64
         else:
             assert False
 
-        llfun = ll.Function(self.llmodule, llty, name)
+        if isinstance(llty, ll.FunctionType):
+            llglobal = ll.Function(self.llmodule, llty, name)
             if name in ("__artiq_raise", "__artiq_reraise", "llvm.trap"):
-            llfun.attributes.add("noreturn")
+                llglobal.attributes.add("noreturn")
-        return llfun
+        else:
+            llglobal = ll.GlobalVariable(self.llmodule, llty, name)
+
+        return llglobal
 
     def map(self, value):
         if isinstance(value, (ir.Argument, ir.Instruction, ir.BasicBlock)):
@@ -774,6 +781,17 @@ class LLVMIRGenerator:
         elif insn.op == "exncast":
             # This is an identity cast at LLVM IR level.
             return self.map(insn.operands[0])
+        elif insn.op == "now_mu":
+            return self.llbuilder.load(self.llbuiltin("now"), name=insn.name)
+        elif insn.op == "delay_mu":
+            interval, = insn.operands
+            llnowptr = self.llbuiltin("now")
+            llnow = self.llbuilder.load(llnowptr)
+            lladjusted = self.llbuilder.add(llnow, self.map(interval))
+            return self.llbuilder.store(lladjusted, llnowptr)
+        elif insn.op == "at_mu":
+            time, = insn.operands
+            return self.llbuilder.store(self.map(time), self.llbuiltin("now"))
         else:
             assert False
 

artiq/coredevice/core.py

@@ -39,7 +39,7 @@ class Core:
             stitcher.stitch_call(function, args, kwargs)
             stitcher.finalize()
 
-            module = Module(stitcher)
+            module = Module(stitcher, ref_period=self.ref_period)
             target = OR1KTarget()
 
             library = target.compile_and_link([module])

artiq/py2llvm_old/transforms/lower_time.py

@@ -1,64 +0,0 @@
-"""
-This transform implements time management functions (delay_mu/now_mu/at_mu)
-using an accumulator 'now' and simple replacement rules:
-
-    delay_mu(t) ->  now += t
-    now_mu()    ->  now
-    at_mu(t)    ->  now = t
-
-The function delay(), that uses seconds, must be lowered to delay_mu() before
-invoking this transform.
-The accumulator is initialized to an int64 value at the beginning of the
-output function.
-"""
-
-import ast
-
-
-class _TimeLowerer(ast.NodeTransformer):
-    def visit_Call(self, node):
-        if node.func.id == "now_mu":
-            return ast.copy_location(ast.Name("now", ast.Load()), node)
-        else:
-            self.generic_visit(node)
-            return node
-
-    def visit_Expr(self, node):
-        r = node
-        if isinstance(node.value, ast.Call):
-            funcname = node.value.func.id
-            if funcname == "delay_mu":
-                r = ast.copy_location(
-                    ast.AugAssign(target=ast.Name("now", ast.Store()),
-                                  op=ast.Add(),
-                                  value=node.value.args[0]),
-                    node)
-            elif funcname == "at_mu":
-                r = ast.copy_location(
-                    ast.Assign(targets=[ast.Name("now", ast.Store())],
-                               value=node.value.args[0]),
-                    node)
-        self.generic_visit(r)
-        return r
-
-
-def lower_time(func_def):
-    _TimeLowerer().visit(func_def)
-    call_init = ast.Call(
-        func=ast.Name("syscall", ast.Load()),
-        args=[ast.Str("now_init")],
-        keywords=[], starargs=None, kwargs=None)
-    stmt_init = ast.Assign(targets=[ast.Name("now", ast.Store())],
-        value=call_init)
-    call_save = ast.Call(
-        func=ast.Name("syscall", ast.Load()),
-        args=[ast.Str("now_save"), ast.Name("now", ast.Load())],
-        keywords=[], starargs=None, kwargs=None)
-    stmt_save = ast.Expr(call_save)
-    func_def.body = [
-        stmt_init,
-        ast.Try(body=func_def.body,
-                handlers=[],
-                orelse=[],
-                finalbody=[stmt_save])
-    ]

artiq/py2llvm_old/transforms/quantize_time.py

@@ -1,69 +1,3 @@
-"""
-This transform turns calls to delay() that use non-integer time
-expressed in seconds into calls to delay_mu() that use int64 time
-expressed in multiples of ref_period.
-
-It does so by inserting multiplication/division/rounding operations around
-those calls.
-
-The seconds_to_mu and mu_to_seconds core language functions are also
-implemented here, as well as watchdog to syscall conversion.
-"""
-
-import ast
-
-from artiq.transforms.tools import value_to_ast
-
-
-def _seconds_to_mu(ref_period, node):
-    divided = ast.copy_location(
-        ast.BinOp(left=node,
-                  op=ast.Div(),
-                  right=value_to_ast(ref_period)),
-        node)
-    return ast.copy_location(
-        ast.Call(func=ast.Name("round64", ast.Load()),
-                 args=[divided],
-                 keywords=[], starargs=[], kwargs=[]),
-        divided)
-
-
-def _mu_to_seconds(ref_period, node):
-    return ast.copy_location(
-        ast.BinOp(left=node,
-                  op=ast.Mult(),
-                  right=value_to_ast(ref_period)),
-        node)
-
-
-class _TimeQuantizer(ast.NodeTransformer):
-    def __init__(self, ref_period):
-        self.ref_period = ref_period
-        self.watchdog_id_counter = 0
-
-    def visit_Call(self, node):
-        funcname = node.func.id
-        if funcname == "delay":
-            node.func.id = "delay_mu"
-            if (isinstance(node.args[0], ast.Call)
-                    and node.args[0].func.id == "mu_to_seconds"):
-                # optimize:
-                # delay(mu_to_seconds(x)) -> delay_mu(x)
-                node.args[0] = self.visit(node.args[0].args[0])
-            else:
-                node.args[0] = _seconds_to_mu(self.ref_period,
-                                              self.visit(node.args[0]))
-            return node
-        elif funcname == "seconds_to_mu":
-                return _seconds_to_mu(self.ref_period,
-                                       self.visit(node.args[0]))
-        elif funcname == "mu_to_seconds":
-            return _mu_to_seconds(self.ref_period,
-                                   self.visit(node.args[0]))
-        else:
-            self.generic_visit(node)
-            return node
-
     def visit_With(self, node):
         self.generic_visit(node)
         if (isinstance(node.items[0].context_expr, ast.Call)
@@ -107,7 +41,3 @@ class _TimeQuantizer(ast.NodeTransformer):
                         finalbody=[stmt_clear])
             ]
         return node
-
-
-def quantize_time(func_def, ref_period):
-    _TimeQuantizer(ref_period).visit(func_def)

lit-test/libartiq_support/Makefile

@@ -1,4 +1,4 @@
 CC ?= clang
 
-libartiq_personality.so: ../../soc/runtime/artiq_personality.c artiq_terminate.c
+libartiq_support.so: ../../soc/runtime/artiq_personality.c artiq_terminate.c artiq_time.c
 	$(CC) -std=c99 -Wall -Werror -I. -I../../soc/runtime -g -fPIC -shared -o $@ $^

lit-test/libartiq_support/artiq_time.c

@@ -0,0 +1,3 @@
+#include <stdint.h>
+
+int64_t now = 0;

lit-test/test/lit.cfg

@@ -17,11 +17,11 @@ not_ = '{} {}'.format(python_executable, os.path.join(root, 'not.py'))
 config.substitutions.append( ('%not', not_) )
 
 if os.name == 'posix':
-    personality_build = os.path.join(root, 'libartiq_personality')
+    support_build = os.path.join(root, 'libartiq_support')
-    if subprocess.call(['make', '-sC', personality_build]) != 0:
+    if subprocess.call(['make', '-sC', support_build]) != 0:
         lit_config.fatal("Unable to build JIT support library")
 
-    personality_lib = os.path.join(personality_build, 'libartiq_personality.so')
+    support_lib = os.path.join(support_build, 'libartiq_support.so')
-    config.environment['LIBARTIQ_PERSONALITY'] = personality_lib
+    config.environment['LIBARTIQ_SUPPORT'] = support_lib
 
     config.available_features.add('exceptions')

lit-test/test/time/advance.py

@@ -0,0 +1,9 @@
+# RUN: %python -m artiq.compiler.testbench.jit %s
+
+assert now() == 0.0
+delay(100.0)
+assert now() == 100.0
+at(12345.0)
+assert now() == 12345.0
+
+assert now_mu() == 12345000000

lit-test/test/time/advance_mu.py

@@ -0,0 +1,7 @@
+# RUN: %python -m artiq.compiler.testbench.jit %s
+
+assert now_mu() == 0
+delay_mu(100)
+assert now_mu() == 100
+at_mu(12345)
+assert now_mu() == 12345

lit-test/test/time/conversion.py

@@ -0,0 +1,4 @@
+# RUN: %python -m artiq.compiler.testbench.jit %s
+
+assert seconds_to_mu(2.0) == 2000000
+assert mu_to_seconds(1500000) == 1.5

soc/runtime/ksupport.c

@@ -19,6 +19,8 @@
 
 void ksupport_abort(void);
 
+int64_t now;
+
 /* compiler-rt symbols */
 extern void __divsi3, __modsi3, __ledf2, __gedf2, __unorddf2, __eqdf2, __ltdf2,
     __nedf2, __gtdf2, __negsf2, __negdf2, __addsf3, __subsf3, __mulsf3,
@@ -87,8 +89,7 @@ static const struct symbol runtime_exports[] = {
     {"abort", &ksupport_abort},
 
     /* proxified syscalls */
-    {"now_init", &now_init},
+    {"now", &now},
-    {"now_save", &now_save},
 
     {"watchdog_set", &watchdog_set},
     {"watchdog_clear", &watchdog_clear},
@@ -212,7 +213,10 @@ int main(void)
         void (*kernel_init)() = request->library_info->init;
 
         mailbox_send_and_wait(&load_reply);
+
+        now = now_init();
         kernel_init();
+        now_save(now);
 
         struct msg_base finished_reply;
         finished_reply.type = MESSAGE_TYPE_FINISHED;