src/intel/genxml/gen_pack_header.py

   1 #encoding=utf-8
   2
   3 from __future__ import (
   4     absolute_import, division, print_function, unicode_literals
   5 )
   6 import xml.parsers.expat
   7 import re
   8 import sys
   9 import copy
  10
  11 license =  """/*
  12  * Copyright (C) 2016 Intel Corporation
  13  *
  14  * Permission is hereby granted, free of charge, to any person obtaining a
  15  * copy of this software and associated documentation files (the "Software"),
  16  * to deal in the Software without restriction, including without limitation
  17  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  18  * and/or sell copies of the Software, and to permit persons to whom the
  19  * Software is furnished to do so, subject to the following conditions:
  20  *
  21  * The above copyright notice and this permission notice (including the next
  22  * paragraph) shall be included in all copies or substantial portions of the
  23  * Software.
  24  *
  25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  26  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  27  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  28  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  29  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  30  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  31  * IN THE SOFTWARE.
  32  */
  33 """
  34
  35 pack_header = """%(license)s
  36
  37 /* Instructions, enums and structures for %(platform)s.
  38  *
  39  * This file has been generated, do not hand edit.
  40  */
  41
  42 #ifndef %(guard)s
  43 #define %(guard)s
  44
  45 #include <stdio.h>
  46 #include <stdint.h>
  47 #include <stdbool.h>
  48 #include <assert.h>
  49 #include <math.h>
  50
  51 #ifndef __gen_validate_value
  52 #define __gen_validate_value(x)
  53 #endif
  54
  55 #ifndef __gen_field_functions
  56 #define __gen_field_functions
  57
  58 union __gen_value {
  59    float f;
  60    uint32_t dw;
  61 };
  62
  63 static inline uint64_t
  64 __gen_mbo(uint32_t start, uint32_t end)
  65 {
  66    return (~0ull >> (64 - (end - start + 1))) << start;
  67 }
  68
  69 static inline uint64_t
  70 __gen_uint(uint64_t v, uint32_t start, uint32_t end)
  71 {
  72    __gen_validate_value(v);
  73
  74 #if DEBUG
  75    const int width = end - start + 1;
  76    if (width < 64) {
  77       const uint64_t max = (1ull << width) - 1;
  78       assert(v <= max);
  79    }
  80 #endif
  81
  82    return v << start;
  83 }
  84
  85 static inline uint64_t
  86 __gen_sint(int64_t v, uint32_t start, uint32_t end)
  87 {
  88    const int width = end - start + 1;
  89
  90    __gen_validate_value(v);
  91
  92 #if DEBUG
  93    if (width < 64) {
  94       const int64_t max = (1ll << (width - 1)) - 1;
  95       const int64_t min = -(1ll << (width - 1));
  96       assert(min <= v && v <= max);
  97    }
  98 #endif
  99
 100    const uint64_t mask = ~0ull >> (64 - width);
 101
 102    return (v & mask) << start;
 103 }
 104
 105 static inline uint64_t
 106 __gen_offset(uint64_t v, uint32_t start, uint32_t end)
 107 {
 108    __gen_validate_value(v);
 109 #if DEBUG
 110    uint64_t mask = (~0ull >> (64 - (end - start + 1))) << start;
 111
 112    assert((v & ~mask) == 0);
 113 #endif
 114
 115    return v;
 116 }
 117
 118 static inline uint32_t
 119 __gen_float(float v)
 120 {
 121    __gen_validate_value(v);
 122    return ((union __gen_value) { .f = (v) }).dw;
 123 }
 124
 125 static inline uint64_t
 126 __gen_sfixed(float v, uint32_t start, uint32_t end, uint32_t fract_bits)
 127 {
 128    __gen_validate_value(v);
 129
 130    const float factor = (1 << fract_bits);
 131
 132 #if DEBUG
 133    const float max = ((1 << (end - start)) - 1) / factor;
 134    const float min = -(1 << (end - start)) / factor;
 135    assert(min <= v && v <= max);
 136 #endif
 137
 138    const int64_t int_val = llroundf(v * factor);
 139    const uint64_t mask = ~0ull >> (64 - (end - start + 1));
 140
 141    return (int_val & mask) << start;
 142 }
 143
 144 static inline uint64_t
 145 __gen_ufixed(float v, uint32_t start, uint32_t end, uint32_t fract_bits)
 146 {
 147    __gen_validate_value(v);
 148
 149    const float factor = (1 << fract_bits);
 150
 151 #if DEBUG
 152    const float max = ((1 << (end - start + 1)) - 1) / factor;
 153    const float min = 0.0f;
 154    assert(min <= v && v <= max);
 155 #endif
 156
 157    const uint64_t uint_val = llroundf(v * factor);
 158
 159    return uint_val << start;
 160 }
 161
 162 #ifndef __gen_address_type
 163 #error #define __gen_address_type before including this file
 164 #endif
 165
 166 #ifndef __gen_user_data
 167 #error #define __gen_combine_address before including this file
 168 #endif
 169
 170 #endif
 171
 172 """
 173
 174 def to_alphanum(name):
 175     substitutions = {
 176         ' ': '',
 177         '/': '',
 178         '[': '',
 179         ']': '',
 180         '(': '',
 181         ')': '',
 182         '-': '',
 183         ':': '',
 184         '.': '',
 185         ',': '',
 186         '=': '',
 187         '>': '',
 188         '#': '',
 189         'α': 'alpha',
 190         '&': '',
 191         '*': '',
 192         '"': '',
 193         '+': '',
 194         '\'': '',
 195     }
 196
 197     for i, j in substitutions.items():
 198         name = name.replace(i, j)
 199
 200     return name
 201
 202 def safe_name(name):
 203     name = to_alphanum(name)
 204     if not name[0].isalpha():
 205         name = '_' + name
 206
 207     return name
 208
 209 def num_from_str(num_str):
 210     if num_str.lower().startswith('0x'):
 211         return int(num_str, base=16)
 212     else:
 213         assert(not num_str.startswith('0') and 'octals numbers not allowed')
 214         return int(num_str)
 215
 216 class Field(object):
 217     ufixed_pattern = re.compile(r"u(\d+)\.(\d+)")
 218     sfixed_pattern = re.compile(r"s(\d+)\.(\d+)")
 219
 220     def __init__(self, parser, attrs):
 221         self.parser = parser
 222         if "name" in attrs:
 223             self.name = safe_name(attrs["name"])
 224         self.start = int(attrs["start"])
 225         self.end = int(attrs["end"])
 226         self.type = attrs["type"]
 227
 228         if "prefix" in attrs:
 229             self.prefix = attrs["prefix"]
 230         else:
 231             self.prefix = None
 232
 233         if "default" in attrs:
 234             self.default = int(attrs["default"])
 235         else:
 236             self.default = None
 237
 238         ufixed_match = Field.ufixed_pattern.match(self.type)
 239         if ufixed_match:
 240             self.type = 'ufixed'
 241             self.fractional_size = int(ufixed_match.group(2))
 242
 243         sfixed_match = Field.sfixed_pattern.match(self.type)
 244         if sfixed_match:
 245             self.type = 'sfixed'
 246             self.fractional_size = int(sfixed_match.group(2))
 247
 248     def emit_template_struct(self, dim):
 249         if self.type == 'address':
 250             type = '__gen_address_type'
 251         elif self.type == 'bool':
 252             type = 'bool'
 253         elif self.type == 'float':
 254             type = 'float'
 255         elif self.type == 'ufixed':
 256             type = 'float'
 257         elif self.type == 'sfixed':
 258             type = 'float'
 259         elif self.type == 'uint' and self.end - self.start > 32:
 260             type = 'uint64_t'
 261         elif self.type == 'offset':
 262             type = 'uint64_t'
 263         elif self.type == 'int':
 264             type = 'int32_t'
 265         elif self.type == 'uint':
 266             type = 'uint32_t'
 267         elif self.type in self.parser.structs:
 268             type = 'struct ' + self.parser.gen_prefix(safe_name(self.type))
 269         elif self.type in self.parser.enums:
 270             type = 'enum ' + self.parser.gen_prefix(safe_name(self.type))
 271         elif self.type == 'mbo':
 272             return
 273         else:
 274             print("#error unhandled type: %s" % self.type)
 275
 276         print("   %-36s %s%s;" % (type, self.name, dim))
 277
 278         if len(self.values) > 0 and self.default == None:
 279             if self.prefix:
 280                 prefix = self.prefix + "_"
 281             else:
 282                 prefix = ""
 283
 284         for value in self.values:
 285             print("#define %-40s %d" % (prefix + value.name, value.value))
 286
 287 class Group(object):
 288     def __init__(self, parser, parent, start, count, size):
 289         self.parser = parser
 290         self.parent = parent
 291         self.start = start
 292         self.count = count
 293         self.size = size
 294         self.fields = []
 295
 296     def emit_template_struct(self, dim):
 297         if self.count == 0:
 298             print("   /* variable length fields follow */")
 299         else:
 300             if self.count > 1:
 301                 dim = "%s[%d]" % (dim, self.count)
 302
 303             for field in self.fields:
 304                 field.emit_template_struct(dim)
 305
 306     class DWord:
 307         def __init__(self):
 308             self.size = 32
 309             self.fields = []
 310             self.address = None
 311
 312     def collect_dwords(self, dwords, start, dim):
 313         for field in self.fields:
 314             if type(field) is Group:
 315                 if field.count == 1:
 316                     field.collect_dwords(dwords, start + field.start, dim)
 317                 else:
 318                     for i in range(field.count):
 319                         field.collect_dwords(dwords,
 320                                              start + field.start + i * field.size,
 321                                              "%s[%d]" % (dim, i))
 322                 continue
 323
 324             index = (start + field.start) // 32
 325             if not index in dwords:
 326                 dwords[index] = self.DWord()
 327
 328             clone = copy.copy(field)
 329             clone.start = clone.start + start
 330             clone.end = clone.end + start
 331             clone.dim = dim
 332             dwords[index].fields.append(clone)
 333
 334             if field.type == "address":
 335                 # assert dwords[index].address == None
 336                 dwords[index].address = field
 337
 338             # Coalesce all the dwords covered by this field. The two cases we
 339             # handle are where multiple fields are in a 64 bit word (typically
 340             # and address and a few bits) or where a single struct field
 341             # completely covers multiple dwords.
 342             while index < (start + field.end) // 32:
 343                 if index + 1 in dwords and not dwords[index] == dwords[index + 1]:
 344                     dwords[index].fields.extend(dwords[index + 1].fields)
 345                 dwords[index].size = 64
 346                 dwords[index + 1] = dwords[index]
 347                 index = index + 1
 348
 349     def emit_pack_function(self, start):
 350         dwords = {}
 351         self.collect_dwords(dwords, 0, "")
 352
 353         # Determine number of dwords in this group. If we have a size, use
 354         # that, since that'll account for MBZ dwords at the end of a group
 355         # (like dword 8 on BDW+ 3DSTATE_HS). Otherwise, use the largest dword
 356         # index we've seen plus one.
 357         if self.size > 0:
 358             length = self.size // 32
 359         else:
 360             length = max(dwords.keys()) + 1
 361
 362         for index in range(length):
 363             # Handle MBZ dwords
 364             if not index in dwords:
 365                 print("")
 366                 print("   dw[%d] = 0;" % index)
 367                 continue
 368
 369             # For 64 bit dwords, we aliased the two dword entries in the dword
 370             # dict it occupies. Now that we're emitting the pack function,
 371             # skip the duplicate entries.
 372             dw = dwords[index]
 373             if index > 0 and index - 1 in dwords and dw == dwords[index - 1]:
 374                 continue
 375
 376             # Special case: only one field and it's a struct at the beginning
 377             # of the dword. In this case we pack directly into the
 378             # destination. This is the only way we handle embedded structs
 379             # larger than 32 bits.
 380             if len(dw.fields) == 1:
 381                 field = dw.fields[0]
 382                 name = field.name + field.dim
 383                 if field.type in self.parser.structs and field.start % 32 == 0:
 384                     print("")
 385                     print("   %s_pack(data, &dw[%d], &values->%s);" %
 386                           (self.parser.gen_prefix(safe_name(field.type)), index, name))
 387                     continue
 388
 389             # Pack any fields of struct type first so we have integer values
 390             # to the dword for those fields.
 391             field_index = 0
 392             for field in dw.fields:
 393                 if type(field) is Field and field.type in self.parser.structs:
 394                     name = field.name + field.dim
 395                     print("")
 396                     print("   uint32_t v%d_%d;" % (index, field_index))
 397                     print("   %s_pack(data, &v%d_%d, &values->%s);" %
 398                           (self.parser.gen_prefix(safe_name(field.type)), index, field_index, name))
 399                     field_index = field_index + 1
 400
 401             print("")
 402             dword_start = index * 32
 403             if dw.address == None:
 404                 address_count = 0
 405             else:
 406                 address_count = 1
 407
 408             if dw.size == 32 and dw.address == None:
 409                 v = None
 410                 print("   dw[%d] =" % index)
 411             elif len(dw.fields) > address_count:
 412                 v = "v%d" % index
 413                 print("   const uint%d_t %s =" % (dw.size, v))
 414             else:
 415                 v = "0"
 416
 417             field_index = 0
 418             for field in dw.fields:
 419                 if field.type != "mbo":
 420                     name = field.name + field.dim
 421
 422                 if field.type == "mbo":
 423                     s = "__gen_mbo(%d, %d)" % \
 424                         (field.start - dword_start, field.end - dword_start)
 425                 elif field.type == "address":
 426                     s = None
 427                 elif field.type == "uint":
 428                     s = "__gen_uint(values->%s, %d, %d)" % \
 429                         (name, field.start - dword_start, field.end - dword_start)
 430                 elif field.type in self.parser.enums:
 431                     s = "__gen_uint(values->%s, %d, %d)" % \
 432                         (name, field.start - dword_start, field.end - dword_start)
 433                 elif field.type == "int":
 434                     s = "__gen_sint(values->%s, %d, %d)" % \
 435                         (name, field.start - dword_start, field.end - dword_start)
 436                 elif field.type == "bool":
 437                     s = "__gen_uint(values->%s, %d, %d)" % \
 438                         (name, field.start - dword_start, field.end - dword_start)
 439                 elif field.type == "float":
 440                     s = "__gen_float(values->%s)" % name
 441                 elif field.type == "offset":
 442                     s = "__gen_offset(values->%s, %d, %d)" % \
 443                         (name, field.start - dword_start, field.end - dword_start)
 444                 elif field.type == 'ufixed':
 445                     s = "__gen_ufixed(values->%s, %d, %d, %d)" % \
 446                         (name, field.start - dword_start, field.end - dword_start, field.fractional_size)
 447                 elif field.type == 'sfixed':
 448                     s = "__gen_sfixed(values->%s, %d, %d, %d)" % \
 449                         (name, field.start - dword_start, field.end - dword_start, field.fractional_size)
 450                 elif field.type in self.parser.structs:
 451                     s = "__gen_uint(v%d_%d, %d, %d)" % \
 452                         (index, field_index, field.start - dword_start, field.end - dword_start)
 453                     field_index = field_index + 1
 454                 else:
 455                     print("/* unhandled field %s, type %s */\n" % (name, field.type))
 456                     s = None
 457
 458                 if not s == None:
 459                     if field == dw.fields[-1]:
 460                         print("      %s;" % s)
 461                     else:
 462                         print("      %s |" % s)
 463
 464             if dw.size == 32:
 465                 if dw.address:
 466                     print("   dw[%d] = __gen_combine_address(data, &dw[%d], values->%s, %s);" % (index, index, dw.address.name, v))
 467                 continue
 468
 469             if dw.address:
 470                 v_address = "v%d_address" % index
 471                 print("   const uint64_t %s =\n      __gen_combine_address(data, &dw[%d], values->%s, %s);" %
 472                       (v_address, index, dw.address.name, v))
 473                 v = v_address
 474
 475             print("   dw[%d] = %s;" % (index, v))
 476             print("   dw[%d] = %s >> 32;" % (index + 1, v))
 477
 478 class Value(object):
 479     def __init__(self, attrs):
 480         self.name = safe_name(attrs["name"])
 481         self.value = int(attrs["value"])
 482
 483 class Parser(object):
 484     def __init__(self):
 485         self.parser = xml.parsers.expat.ParserCreate()
 486         self.parser.StartElementHandler = self.start_element
 487         self.parser.EndElementHandler = self.end_element
 488
 489         self.instruction = None
 490         self.structs = {}
 491         self.enums = {}
 492         self.registers = {}
 493
 494     def gen_prefix(self, name):
 495         if name[0] == "_":
 496             return 'GEN%s%s' % (self.gen, name)
 497         else:
 498             return 'GEN%s_%s' % (self.gen, name)
 499
 500     def gen_guard(self):
 501         return self.gen_prefix("PACK_H")
 502
 503     def start_element(self, name, attrs):
 504         if name == "genxml":
 505             self.platform = attrs["name"]
 506             self.gen = attrs["gen"].replace('.', '')
 507             print(pack_header % {'license': license, 'platform': self.platform, 'guard': self.gen_guard()})
 508         elif name in ("instruction", "struct", "register"):
 509             if name == "instruction":
 510                 self.instruction = safe_name(attrs["name"])
 511                 self.length_bias = int(attrs["bias"])
 512             elif name == "struct":
 513                 self.struct = safe_name(attrs["name"])
 514                 self.structs[attrs["name"]] = 1
 515             elif name == "register":
 516                 self.register = safe_name(attrs["name"])
 517                 self.reg_num = num_from_str(attrs["num"])
 518                 self.registers[attrs["name"]] = 1
 519             if "length" in attrs:
 520                 self.length = int(attrs["length"])
 521                 size = self.length * 32
 522             else:
 523                 self.length = None
 524                 size = 0
 525             self.group = Group(self, None, 0, 1, size)
 526
 527         elif name == "group":
 528             group = Group(self, self.group,
 529                           int(attrs["start"]), int(attrs["count"]), int(attrs["size"]))
 530             self.group.fields.append(group)
 531             self.group = group
 532         elif name == "field":
 533             self.group.fields.append(Field(self, attrs))
 534             self.values = []
 535         elif name == "enum":
 536             self.values = []
 537             self.enum = safe_name(attrs["name"])
 538             self.enums[attrs["name"]] = 1
 539             if "prefix" in attrs:
 540                 self.prefix = safe_name(attrs["prefix"])
 541             else:
 542                 self.prefix= None
 543         elif name == "value":
 544             self.values.append(Value(attrs))
 545
 546     def end_element(self, name):
 547         if name  == "instruction":
 548             self.emit_instruction()
 549             self.instruction = None
 550             self.group = None
 551         elif name == "struct":
 552             self.emit_struct()
 553             self.struct = None
 554             self.group = None
 555         elif name == "register":
 556             self.emit_register()
 557             self.register = None
 558             self.reg_num = None
 559             self.group = None
 560         elif name == "group":
 561             self.group = self.group.parent
 562         elif name  == "field":
 563             self.group.fields[-1].values = self.values
 564         elif name  == "enum":
 565             self.emit_enum()
 566             self.enum = None
 567         elif name == "genxml":
 568             print('#endif /* %s */' % self.gen_guard())
 569
 570     def emit_template_struct(self, name, group):
 571         print("struct %s {" % self.gen_prefix(name))
 572         group.emit_template_struct("")
 573         print("};\n")
 574
 575     def emit_pack_function(self, name, group):
 576         name = self.gen_prefix(name)
 577         print("static inline void\n%s_pack(__gen_user_data *data, void * restrict dst,\n%sconst struct %s * restrict values)\n{" %
 578               (name, ' ' * (len(name) + 6), name))
 579
 580         # Cast dst to make header C++ friendly
 581         print("   uint32_t * restrict dw = (uint32_t * restrict) dst;")
 582
 583         group.emit_pack_function(0)
 584
 585         print("}\n")
 586
 587     def emit_instruction(self):
 588         name = self.instruction
 589         if not self.length == None:
 590             print('#define %-33s %6d' %
 591                   (self.gen_prefix(name + "_length"), self.length))
 592         print('#define %-33s %6d' %
 593               (self.gen_prefix(name + "_length_bias"), self.length_bias))
 594
 595         default_fields = []
 596         for field in self.group.fields:
 597             if not type(field) is Field:
 598                 continue
 599             if field.default == None:
 600                 continue
 601             default_fields.append("   .%-35s = %6d" % (field.name, field.default))
 602
 603         if default_fields:
 604             print('#define %-40s\\' % (self.gen_prefix(name + '_header')))
 605             print(",  \\\n".join(default_fields))
 606             print('')
 607
 608         self.emit_template_struct(self.instruction, self.group)
 609
 610         self.emit_pack_function(self.instruction, self.group)
 611
 612     def emit_register(self):
 613         name = self.register
 614         if not self.reg_num == None:
 615             print('#define %-33s 0x%04x' %
 616                   (self.gen_prefix(name + "_num"), self.reg_num))
 617
 618         if not self.length == None:
 619             print('#define %-33s %6d' %
 620                   (self.gen_prefix(name + "_length"), self.length))
 621
 622         self.emit_template_struct(self.register, self.group)
 623         self.emit_pack_function(self.register, self.group)
 624
 625     def emit_struct(self):
 626         name = self.struct
 627         if not self.length == None:
 628             print('#define %-33s %6d' %
 629                   (self.gen_prefix(name + "_length"), self.length))
 630
 631         self.emit_template_struct(self.struct, self.group)
 632         self.emit_pack_function(self.struct, self.group)
 633
 634     def emit_enum(self):
 635         print('enum %s {' % self.gen_prefix(self.enum))
 636         for value in self.values:
 637             if self.prefix:
 638                 name = self.prefix + "_" + value.name
 639             else:
 640                 name = value.name
 641             print('   %-36s = %6d,' % (name.upper(), value.value))
 642         print('};\n')
 643
 644     def parse(self, filename):
 645         file = open(filename, "rb")
 646         self.parser.ParseFile(file)
 647         file.close()
 648
 649 if len(sys.argv) < 2:
 650     print("No input xml file specified")
 651     sys.exit(1)
 652
 653 input_file = sys.argv[1]
 654
 655 p = Parser()
 656 p.parse(input_file)