forked from M-Labs/artiq
161 lines
5.1 KiB
Python
161 lines
5.1 KiB
Python
import os
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from fractions import Fraction
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from llvm import core as lc
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from llvm import target as lt
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from artiq.py2llvm import base_types
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from artiq.language import units
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lt.initialize_all()
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_syscalls = {
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"rpc": "i+:i",
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"gpio_set": "ii:n",
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"rtio_oe": "ii:n",
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"rtio_set": "Iii:n",
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"rtio_replace": "Iii:n",
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"rtio_sync": "i:n",
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"rtio_get_counter": "n:I",
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"rtio_get": "i:I",
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"rtio_pileup_count": "i:i",
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"dds_phase_clear_en": "ib:n",
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"dds_program": "IiiiIbb:n",
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}
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_chr_to_type = {
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"n": lambda: lc.Type.void(),
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"b": lambda: lc.Type.int(1),
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"i": lambda: lc.Type.int(32),
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"I": lambda: lc.Type.int(64)
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}
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_chr_to_value = {
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"n": lambda: base_types.VNone(),
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"b": lambda: base_types.VBool(),
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"i": lambda: base_types.VInt(),
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"I": lambda: base_types.VInt(64)
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}
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def _str_to_functype(s):
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assert(s[-2] == ":")
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type_ret = _chr_to_type[s[-1]]()
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var_arg_fixcount = None
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type_args = []
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for n, c in enumerate(s[:-2]):
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if c == "+":
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type_args.append(lc.Type.int())
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var_arg_fixcount = n
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elif c != "n":
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type_args.append(_chr_to_type[c]())
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return (var_arg_fixcount,
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lc.Type.function(type_ret, type_args,
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var_arg=var_arg_fixcount is not None))
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class LinkInterface:
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def init_module(self, module):
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self.llvm_module = module.llvm_module
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# syscalls
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self.var_arg_fixcount = dict()
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for func_name, func_type_str in _syscalls.items():
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var_arg_fixcount, func_type = _str_to_functype(func_type_str)
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if var_arg_fixcount is not None:
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self.var_arg_fixcount[func_name] = var_arg_fixcount
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self.llvm_module.add_function(func_type, "__syscall_"+func_name)
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# exception handling
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func_type = lc.Type.function(lc.Type.int(), [lc.Type.pointer(lc.Type.int(8))])
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function = self.llvm_module.add_function(func_type, "__eh_setjmp")
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function.add_attribute(lc.ATTR_NO_UNWIND)
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function.add_attribute(lc.ATTR_RETURNS_TWICE)
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func_type = lc.Type.function(lc.Type.pointer(lc.Type.int(8)), [])
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self.llvm_module.add_function(func_type, "__eh_push")
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func_type = lc.Type.function(lc.Type.void(), [lc.Type.int()])
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self.llvm_module.add_function(func_type, "__eh_pop")
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func_type = lc.Type.function(lc.Type.int(), [])
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self.llvm_module.add_function(func_type, "__eh_getid")
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func_type = lc.Type.function(lc.Type.void(), [lc.Type.int()])
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function = self.llvm_module.add_function(func_type, "__eh_raise")
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function.add_attribute(lc.ATTR_NO_RETURN)
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def build_syscall(self, syscall_name, args, builder):
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r = _chr_to_value[_syscalls[syscall_name][-1]]()
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if builder is not None:
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args = [arg.auto_load(builder) for arg in args]
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if syscall_name in self.var_arg_fixcount:
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fixcount = self.var_arg_fixcount[syscall_name]
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args = args[:fixcount] \
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+ [lc.Constant.int(lc.Type.int(), len(args) - fixcount)] \
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+ args[fixcount:]
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llvm_function = self.llvm_module.get_function_named(
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"__syscall_" + syscall_name)
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r.auto_store(builder, builder.call(llvm_function, args))
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return r
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def build_catch(self, builder):
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eh_setjmp = self.llvm_module.get_function_named("__eh_setjmp")
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eh_push = self.llvm_module.get_function_named("__eh_push")
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jmpbuf = builder.call(eh_push, [])
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exception_occured = builder.call(eh_setjmp, [jmpbuf])
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return builder.icmp(lc.ICMP_NE,
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exception_occured,
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lc.Constant.int(lc.Type.int(), 0))
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def build_pop(self, builder, levels):
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eh_pop = self.llvm_module.get_function_named("__eh_pop")
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builder.call(eh_pop, [lc.Constant.int(lc.Type.int(), levels)])
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def build_getid(self, builder):
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eh_getid = self.llvm_module.get_function_named("__eh_getid")
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return builder.call(eh_getid, [])
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def build_raise(self, builder, eid):
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eh_raise = self.llvm_module.get_function_named("__eh_raise")
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builder.call(eh_raise, [eid])
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def _debug_dump_obj(obj):
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try:
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env = os.environ["ARTIQ_DUMP_OBJECT"]
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except KeyError:
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return
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for i in range(1000):
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filename = "{}_{:03d}.elf".format(env, i)
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try:
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f = open(filename, "xb")
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except FileExistsError:
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pass
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else:
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f.write(obj)
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f.close()
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return
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raise IOError
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class Environment(LinkInterface):
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def __init__(self, ref_period):
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self.cpu_type = "or1k"
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self.ref_period = ref_period
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# allow 1ms for all initial DDS programming
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self.initial_time = int(Fraction(1, 1000)/self.ref_period)
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def emit_object(self):
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tm = lt.TargetMachine.new(triple=self.cpu_type, cpu="generic")
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obj = tm.emit_object(self.llvm_module)
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_debug_dump_obj(obj)
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return obj
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def __repr__(self):
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return "<Environment {} {}>".format(self.cpu_type,
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str(units.Hz/self.ref_period))
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