src/openpower/sv/sv_binutils.py

   1 import abc as _abc
   2 import argparse as _argparse
   3 import codecs as _codecs
   4 import csv as _csv
   5 import dataclasses as _dataclasses
   6 import enum as _enum
   7 import pathlib as _pathlib
   8 import re as _re
   9 import sys as _sys
  10
  11 from openpower.decoder.power_enums import (
  12     In1Sel as _In1Sel,
  13     In2Sel as _In2Sel,
  14     In3Sel as _In3Sel,
  15     OutSel as _OutSel,
  16     CRInSel as _CRInSel,
  17     CROutSel as _CROutSel,
  18     SVPtype as _SVPtype,
  19     SVEtype as _SVEtype,
  20     SVEXTRA as _SVEXTRA,
  21 )
  22 from openpower.decoder.power_svp64 import SVP64RM as _SVP64RM
  23
  24
  25 DISCLAIMER = (
  26     "/*",
  27     " * this file is auto-generated, do not edit",
  28     " * http://libre-soc.org/openpower/sv_binutiks.py",
  29     " * part of Libre-SOC, sponsored by NLnet",
  30     " */",
  31 )
  32
  33
  34 def indent(strings):
  35     return map(lambda string: ("    " + string), strings)
  36
  37
  38 class Field:
  39     @classmethod
  40     @_abc.abstractmethod
  41     def c_decl(self, name):
  42         pass
  43
  44     @_abc.abstractmethod
  45     def c_value(self, prefix="", suffix=""):
  46         pass
  47
  48     @classmethod
  49     @_abc.abstractmethod
  50     def c_var(self, name):
  51         pass
  52
  53
  54 class Enum(Field, _enum.Enum):
  55     @classmethod
  56     def c_decl(cls):
  57         c_tag = f"svp64_{cls.__name__.lower()}"
  58         yield f"enum {c_tag} {{"
  59         for item in cls:
  60             yield from indent(item.c_value(suffix=","))
  61         yield f"}};"
  62
  63     def c_value(self, prefix="", suffix=""):
  64         c_tag = f"svp64_{self.__class__.__name__.lower()}"
  65         yield f"{prefix}{c_tag.upper()}_{self.name.upper()}{suffix}"
  66
  67     @classmethod
  68     def c_var(cls, name):
  69         c_tag = f"svp64_{cls.__name__.lower()}"
  70         yield f"enum {c_tag} {name};"
  71
  72
  73 # Python forbids inheriting from enum unless it's empty.
  74 In1Sel = Enum("In1Sel", {item.name:item.value for item in _In1Sel})
  75 In2Sel = Enum("In2Sel", {item.name:item.value for item in _In2Sel})
  76 In3Sel = Enum("In3Sel", {item.name:item.value for item in _In3Sel})
  77 OutSel = Enum("OutSel", {item.name:item.value for item in _OutSel})
  78 CRInSel = Enum("CRInSel", {item.name:item.value for item in _CRInSel})
  79 CROutSel = Enum("CROutSel", {item.name:item.value for item in _CROutSel})
  80 SVPType = Enum("SVPType", {item.name:item.value for item in _SVPtype})
  81 SVEType = Enum("SVEType", {item.name:item.value for item in _SVEtype})
  82 SVEXTRA = Enum("SVEXTRA", {item.name:item.value for item in _SVEXTRA})
  83
  84
  85 class Opcode(Field):
  86     def __init__(self, value, mask, bits):
  87         self.__value = value
  88         self.__mask = mask
  89         self.__bits = bits
  90
  91         return super().__init__()
  92
  93     @property
  94     def value(self):
  95         return self.__value
  96
  97     @property
  98     def mask(self):
  99         return self.__mask
 100
 101     @property
 102     def bits(self):
 103         return self.__bits
 104
 105     def __repr__(self):
 106         fmt = f"{{value:0{self.bits}b}}:{{mask:0{self.bits}b}}"
 107         return fmt.format(value=self.value, mask=self.mask)
 108
 109     @classmethod
 110     def c_decl(cls):
 111         yield f"struct svp64_opcode {{"
 112         yield from indent([
 113             "uint32_t value;",
 114             "uint32_t mask;",
 115         ])
 116         yield f"}};"
 117
 118     def c_value(self, prefix="", suffix=""):
 119         yield f"{prefix}{{"
 120         yield from indent([
 121             f".value = UINT32_C(0x{self.value:08X}),",
 122             f".mask = UINT32_C(0x{self.mask:08X}),",
 123         ])
 124         yield f"}}{suffix}"
 125
 126     @classmethod
 127     def c_var(cls, name):
 128         yield f"struct svp64_opcode {name};"
 129
 130
 131 class IntegerOpcode(Opcode):
 132     def __init__(self, integer):
 133         value = int(integer, 0)
 134         bits = max(1, value.bit_length())
 135         mask = int(("1" * bits), 2)
 136
 137         return super().__init__(value=value, mask=mask, bits=bits)
 138
 139
 140 class PatternOpcode(Opcode):
 141     def __init__(self, pattern):
 142         value = 0
 143         mask = 0
 144         bits = len(pattern)
 145         for bit in pattern:
 146             value |= (bit == "1")
 147             mask |= (bit != "-")
 148             value <<= 1
 149             mask <<= 1
 150         value >>= 1
 151         mask >>= 1
 152
 153         return super().__init__(value=value, mask=mask, bits=bits)
 154
 155
 156 class Name(Field, str):
 157     def __repr__(self):
 158         escaped = self.replace("\"", "\\\"")
 159         return f"\"{escaped}\""
 160
 161     def c_value(self, prefix="", suffix=""):
 162         yield f"{prefix}{self!r}{suffix}"
 163
 164     @classmethod
 165     def c_var(cls, name):
 166         yield f"const char *{name};"
 167
 168
 169 @_dataclasses.dataclass(eq=True, frozen=True)
 170 class Entry:
 171     name: Name
 172     opcode: Opcode
 173     in1: In1Sel
 174     in2: In2Sel
 175     in3: In3Sel
 176     out: OutSel
 177     out2: OutSel
 178     cr_in: CRInSel
 179     cr_out: CROutSel
 180     sv_ptype: SVPType
 181     sv_etype: SVEType
 182     sv_in1: SVEXTRA
 183     sv_in2: SVEXTRA
 184     sv_in3: SVEXTRA
 185     sv_out: SVEXTRA
 186     sv_out2: SVEXTRA
 187     sv_cr_in: SVEXTRA
 188     sv_cr_out: SVEXTRA
 189
 190     @classmethod
 191     def c_decl(cls):
 192         bits_all = 0
 193         yield f"struct svp64_entry {{"
 194         for field in _dataclasses.fields(cls):
 195             if issubclass(field.type, Enum):
 196                 bits = len(field.type).bit_length()
 197                 yield from indent([f"uint64_t {field.name} : {bits};"])
 198                 bits_all += bits
 199             else:
 200                 yield from indent(field.type.c_var(name=field.name))
 201         bits_rsvd = (64 - (bits_all % 64))
 202         if bits_rsvd:
 203             yield from indent([f"uint64_t : {bits_rsvd};"])
 204         yield f"}};"
 205
 206     def c_value(self, prefix="", suffix=""):
 207         yield f"{prefix}{{"
 208         for field in _dataclasses.fields(self):
 209             name = field.name
 210             attr = getattr(self, name)
 211             yield from indent(attr.c_value(prefix=f".{name} = ", suffix=","))
 212         yield f"}}{suffix}"
 213
 214     @classmethod
 215     def c_var(cls, name):
 216         yield f"struct svp64_entry {name};"
 217
 218
 219 class Codegen(_enum.Enum):
 220     PPC_OPC_SVP64_H = _enum.auto()
 221     PPC_OPC_SVP64_C = _enum.auto()
 222
 223     @classmethod
 224     def _missing_(cls, value):
 225         return {
 226             "ppc-opc-svp64.h": Codegen.PPC_OPC_SVP64_H,
 227             "ppc-opc-svp64.c": Codegen.PPC_OPC_SVP64_C,
 228         }[value]
 229
 230     def __str__(self):
 231         return {
 232             Codegen.PPC_OPC_SVP64_H: "ppc-opc-svp64.h",
 233             Codegen.PPC_OPC_SVP64_C: "ppc-opc-svp64.c",
 234         }[self]
 235
 236     def generate(self, entries):
 237         def ppc_opc_svp64_h(entries):
 238             yield from DISCLAIMER
 239             yield ""
 240
 241             yield f"#ifndef {self.name}"
 242             yield f"#define {self.name}"
 243             yield ""
 244
 245             yield from Opcode.c_decl()
 246             yield ""
 247
 248             enums = (
 249                 In1Sel, In2Sel, In3Sel, OutSel,
 250                 CRInSel, CROutSel,
 251                 SVPType, SVEType, SVEXTRA,
 252             )
 253             for enum in enums:
 254                 yield from enum.c_decl()
 255                 yield ""
 256
 257             yield from Entry.c_decl()
 258             yield ""
 259
 260             yield f"#endif /* {self.name} */"
 261             yield ""
 262
 263         def ppc_opc_svp64_c(entries):
 264             yield from ()
 265
 266         return {
 267             Codegen.PPC_OPC_SVP64_H: ppc_opc_svp64_h,
 268             Codegen.PPC_OPC_SVP64_C: ppc_opc_svp64_c,
 269         }[self](entries)
 270
 271
 272 def regex_enum(enum):
 273     assert issubclass(enum, _enum.Enum)
 274     return "|".join(item.name for item in enum)
 275
 276
 277 PATTERN_VHDL_BINARY = r"(?:2#[01]+#)"
 278 PATTERN_DECIMAL = r"(?:[0-9]+)"
 279 PATTERN_PARTIAL_BINARY = r"(?:[01-]+)"
 280
 281 # Examples of the entries to be caught by the pattern below:
 282 # 2 => (P2, EXTRA3, RA_OR_ZERO, NONE, NONE, RT, NONE, NONE, NONE, Idx1, NONE, NONE, Idx0, NONE, NONE, NONE), -- lwz
 283 # -----10110 => (P2, EXTRA3, NONE, FRB, NONE, FRT, NONE, NONE, CR1, NONE, Idx1, NONE, Idx0, NONE, NONE, Idx0), -- fsqrts
 284 # 2#0000000000# => (P2, EXTRA3, NONE, NONE, NONE, NONE, NONE, BFA, BF, NONE, NONE, NONE, NONE, NONE, Idx1, Idx0), -- mcrf
 285 PATTERN = "".join((
 286     r"^\s*",
 287     rf"(?P<opcode>{PATTERN_VHDL_BINARY}|{PATTERN_DECIMAL}|{PATTERN_PARTIAL_BINARY})",
 288     r"\s?=>\s?",
 289     r"\(",
 290     r",\s".join((
 291         rf"(?P<ptype>{regex_enum(_SVPtype)})",
 292         rf"(?P<etype>{regex_enum(_SVEtype)})",
 293         rf"(?P<in1>{regex_enum(_In1Sel)})",
 294         rf"(?P<in2>{regex_enum(_In2Sel)})",
 295         rf"(?P<in3>{regex_enum(_In3Sel)})",
 296         rf"(?P<out>{regex_enum(_OutSel)})",
 297         rf"(?P<out2>{regex_enum(_OutSel)})",
 298         rf"(?P<cr_in>{regex_enum(_CRInSel)})",
 299         rf"(?P<cr_out>{regex_enum(_CROutSel)})",
 300         rf"(?P<sv_in1>{regex_enum(_SVEXTRA)})",
 301         rf"(?P<sv_in2>{regex_enum(_SVEXTRA)})",
 302         rf"(?P<sv_in3>{regex_enum(_SVEXTRA)})",
 303         rf"(?P<sv_out>{regex_enum(_SVEXTRA)})",
 304         rf"(?P<sv_out2>{regex_enum(_SVEXTRA)})",
 305         rf"(?P<sv_cr_in>{regex_enum(_SVEXTRA)})",
 306         rf"(?P<sv_cr_out>{regex_enum(_SVEXTRA)})",
 307     )),
 308     r"\)",
 309     r",",
 310     r"\s?--\s?",
 311     r"(?P<name>[A-Za-z0-9_\./]+)",
 312     r"\s*$",
 313 ))
 314 REGEX = _re.compile(PATTERN)
 315
 316
 317 ISA = _SVP64RM()
 318 FIELDS = {field.name:field for field in _dataclasses.fields(Entry)}
 319 def parse(path, opcode_cls):
 320     for entry in ISA.get_svp64_csv(path):
 321         # skip instructions that are not suitable
 322         name = entry["name"] = entry.pop("comment").split("=")[-1]
 323         if name.startswith("l") and name.endswith("br"):
 324             continue
 325         if name in {"mcrxr", "mcrxrx", "darn"}:
 326             continue
 327         if name in {"bctar", "bcctr"}:
 328             continue
 329         if "rfid" in name:
 330             continue
 331         if name in {"setvl"}:
 332             continue
 333
 334         entry = {key.lower().replace(" ", "_"):value for (key, value) in entry.items()}
 335         for (key, value) in tuple(entry.items()):
 336             key = key.lower().replace(" ", "_")
 337             if key not in FIELDS:
 338                 entry.pop(key)
 339             else:
 340                 field = FIELDS[key]
 341                 if issubclass(field.type, _enum.Enum):
 342                     value = {item.name:item for item in field.type}[value]
 343                 elif issubclass(field.type, Opcode):
 344                     value = opcode_cls(value)
 345                 else:
 346                     value = field.type(value)
 347                 entry[key] = value
 348
 349         yield Entry(**entry)
 350
 351
 352 def main(codegen):
 353     entries = []
 354     table = {
 355         "minor_19.csv": IntegerOpcode,
 356         "minor_30.csv": IntegerOpcode,
 357         "minor_31.csv": IntegerOpcode,
 358         "minor_58.csv": IntegerOpcode,
 359         "minor_62.csv": IntegerOpcode,
 360         "minor_22.csv": IntegerOpcode,
 361         "minor_5.csv": PatternOpcode,
 362         "minor_63.csv": PatternOpcode,
 363         "minor_59.csv": PatternOpcode,
 364         "major.csv": IntegerOpcode,
 365         "extra.csv": PatternOpcode,
 366     }
 367     for (path, opcode_cls) in table.items():
 368         entries.extend(parse(path, opcode_cls))
 369
 370     for line in codegen.generate(entries):
 371         print(line)
 372
 373
 374 if __name__ == "__main__":
 375     parser = _argparse.ArgumentParser()
 376     parser.add_argument("codegen", type=Codegen, choices=Codegen, help="code generator")
 377
 378     args = vars(parser.parse_args())
 379     main(**args)