2 # -*- coding: utf-8 -*-
5 Type-transformation rules.
8 __author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
9 __copyright__ = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
10 __license__ = "GPL version 2 or (at your option) any later version"
12 __maintainer__ = "Stefan Hajnoczi"
13 __email__ = "stefanha@linux.vnet.ibm.com"
16 def _transform_type(type_, trans):
17 if isinstance(trans, str):
19 elif isinstance(trans, dict):
21 return _transform_type(type_, trans[type_])
23 return _transform_type(type_, trans[None])
29 raise ValueError("Invalid type transformation rule: %s" % trans)
32 def transform_type(type_, *trans):
33 """Return a new type transformed according to the given rules.
35 Applies each of the transformation rules in trans in order.
37 If an element of trans is a string, return it.
39 If an element of trans is a function, call it with type_ as its only
42 If an element of trans is a dict, search type_ in its keys. If type_ is
43 a key, use the value as a transformation rule for type_. Otherwise, if
44 None is a key use the value as a transformation rule for type_.
46 Otherwise, return type_.
52 trans : list of function or dict
53 Type transformation rules.
59 res = _transform_type(res, t)
63 ##################################################
66 def _tcg_2_host(type_):
68 # force a fixed-size type (target-independent)
74 "TCGv_i32": "uint32_t",
75 "TCGv_i64": "uint64_t",
81 ##################################################
82 # host -> host compatible with tcg sizes
85 "uint8_t": "uint32_t",
89 ##################################################
92 def _host_2_tcg(type_):
93 if type_.startswith("TCGv"):
95 raise ValueError("Don't know how to translate '%s' into a TCG type\n" % type_)
98 "uint32_t": "TCGv_i32",
99 "uint64_t": "TCGv_i64",
100 "void *" : "TCGv_ptr",
105 ##################################################
106 # tcg -> tcg helper definition
108 def _tcg_2_helper_def(type_):
110 return "target_ulong"
114 TCG_2_TCG_HELPER_DEF = {
115 "TCGv_i32": "uint32_t",
116 "TCGv_i64": "uint64_t",
117 "TCGv_ptr": "void *",
118 None: _tcg_2_helper_def,
122 ##################################################
123 # tcg -> tcg helper declaration
125 def _tcg_2_tcg_helper_decl_error(type_):
126 raise ValueError("Don't know how to translate type '%s' into a TCG helper declaration type\n" % type_)
128 TCG_2_TCG_HELPER_DECL = {
133 None: _tcg_2_tcg_helper_decl_error,
137 ##################################################
138 # host/tcg -> tcg temporal constant allocation
140 def _host_2_tcg_tmp_new(type_):
141 if type_.startswith("TCGv"):
142 return "tcg_temp_new_nop"
143 raise ValueError("Don't know how to translate type '%s' into a TCG temporal allocation" % type_)
145 HOST_2_TCG_TMP_NEW = {
146 "uint32_t": "tcg_const_i32",
147 "uint64_t": "tcg_const_i64",
148 "void *" : "tcg_const_ptr",
149 None: _host_2_tcg_tmp_new,
153 ##################################################
154 # host/tcg -> tcg temporal constant deallocation
156 def _host_2_tcg_tmp_free(type_):
157 if type_.startswith("TCGv"):
158 return "tcg_temp_free_nop"
159 raise ValueError("Don't know how to translate type '%s' into a TCG temporal deallocation" % type_)
161 HOST_2_TCG_TMP_FREE = {
162 "uint32_t": "tcg_temp_free_i32",
163 "uint64_t": "tcg_temp_free_i64",
164 "void *" : "tcg_temp_free_ptr",
165 None: _host_2_tcg_tmp_free,