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# -*- coding: utf-8 -*-
"""
Type-transformation rules.
"""
__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
__copyright__ = "Copyright 2012-2016, Lluís Vilanova <vilanova@ac.upc.edu>"
__license__ = "GPL version 2 or (at your option) any later version"
__maintainer__ = "Stefan Hajnoczi"
__email__ = "stefanha@redhat.com"
def _transform_type(type_, trans):
if isinstance(trans, str):
return trans
elif isinstance(trans, dict):
if type_ in trans:
return _transform_type(type_, trans[type_])
elif None in trans:
return _transform_type(type_, trans[None])
else:
return type_
elif callable(trans):
return trans(type_)
else:
raise ValueError("Invalid type transformation rule: %s" % trans)
def transform_type(type_, *trans):
"""Return a new type transformed according to the given rules.
Applies each of the transformation rules in trans in order.
If an element of trans is a string, return it.
If an element of trans is a function, call it with type_ as its only
argument.
If an element of trans is a dict, search type_ in its keys. If type_ is
a key, use the value as a transformation rule for type_. Otherwise, if
None is a key use the value as a transformation rule for type_.
Otherwise, return type_.
Parameters
----------
type_ : str
Type to transform.
trans : list of function or dict
Type transformation rules.
"""
if len(trans) == 0:
raise ValueError
res = type_
for t in trans:
res = _transform_type(res, t)
return res
##################################################
# tcg -> host
def _tcg_2_host(type_):
if type_ == "TCGv":
# force a fixed-size type (target-independent)
return "uint64_t"
else:
return type_
TCG_2_HOST = {
"TCGv_i32": "uint32_t",
"TCGv_i64": "uint64_t",
"TCGv_ptr": "void *",
None: _tcg_2_host,
}
##################################################
# host -> host compatible with tcg sizes
HOST_2_TCG_COMPAT = {
"uint8_t": "uint32_t",
"uint16_t": "uint32_t",
}
##################################################
# host/tcg -> tcg
def _host_2_tcg(type_):
if type_.startswith("TCGv"):
return type_
raise ValueError("Don't know how to translate '%s' into a TCG type\n" % type_)
HOST_2_TCG = {
"uint32_t": "TCGv_i32",
"uint64_t": "TCGv_i64",
"void *" : "TCGv_ptr",
"CPUArchState *": "TCGv_env",
None: _host_2_tcg,
}
##################################################
# tcg -> tcg helper definition
def _tcg_2_helper_def(type_):
if type_ == "TCGv":
return "target_ulong"
else:
return type_
TCG_2_TCG_HELPER_DEF = {
"TCGv_i32": "uint32_t",
"TCGv_i64": "uint64_t",
"TCGv_ptr": "void *",
None: _tcg_2_helper_def,
}
##################################################
# tcg -> tcg helper declaration
def _tcg_2_tcg_helper_decl_error(type_):
raise ValueError("Don't know how to translate type '%s' into a TCG helper declaration type\n" % type_)
TCG_2_TCG_HELPER_DECL = {
"TCGv" : "tl",
"TCGv_ptr": "ptr",
"TCGv_i32": "i32",
"TCGv_i64": "i64",
"TCGv_env": "env",
None: _tcg_2_tcg_helper_decl_error,
}
##################################################
# host/tcg -> tcg temporal constant allocation
def _host_2_tcg_tmp_new(type_):
if type_.startswith("TCGv"):
return "tcg_temp_new_nop"
raise ValueError("Don't know how to translate type '%s' into a TCG temporal allocation" % type_)
HOST_2_TCG_TMP_NEW = {
"uint32_t": "tcg_const_i32",
"uint64_t": "tcg_const_i64",
"void *" : "tcg_const_ptr",
None: _host_2_tcg_tmp_new,
}
##################################################
# host/tcg -> tcg temporal constant deallocation
def _host_2_tcg_tmp_free(type_):
if type_.startswith("TCGv"):
return "tcg_temp_free_nop"
raise ValueError("Don't know how to translate type '%s' into a TCG temporal deallocation" % type_)
HOST_2_TCG_TMP_FREE = {
"uint32_t": "tcg_temp_free_i32",
"uint64_t": "tcg_temp_free_i64",
"void *" : "tcg_temp_free_ptr",
None: _host_2_tcg_tmp_free,
}
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