src/intel/genxml/gen_pack_header.py

   1 #!/usr/bin/env python3
   2
   3 import xml.parsers.expat
   4 import re
   5 import sys
   6 import copy
   7
   8 license =  """/*
   9  * Copyright (C) 2016 Intel Corporation
  10  *
  11  * Permission is hereby granted, free of charge, to any person obtaining a
  12  * copy of this software and associated documentation files (the "Software"),
  13  * to deal in the Software without restriction, including without limitation
  14  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  15  * and/or sell copies of the Software, and to permit persons to whom the
  16  * Software is furnished to do so, subject to the following conditions:
  17  *
  18  * The above copyright notice and this permission notice (including the next
  19  * paragraph) shall be included in all copies or substantial portions of the
  20  * Software.
  21  *
  22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  23  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  25  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  26  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  27  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  28  * IN THE SOFTWARE.
  29  */
  30 """
  31
  32 pack_header = """%(license)s
  33
  34 /* Instructions, enums and structures for %(platform)s.
  35  *
  36  * This file has been generated, do not hand edit.
  37  */
  38
  39 #pragma once
  40
  41 #include <stdio.h>
  42 #include <stdint.h>
  43 #include <stdbool.h>
  44 #include <assert.h>
  45 #include <math.h>
  46
  47 #ifndef __gen_validate_value
  48 #define __gen_validate_value(x)
  49 #endif
  50
  51 #ifndef __gen_field_functions
  52 #define __gen_field_functions
  53
  54 union __gen_value {
  55    float f;
  56    uint32_t dw;
  57 };
  58
  59 static inline uint64_t
  60 __gen_mbo(uint32_t start, uint32_t end)
  61 {
  62    return (~0ull >> (64 - (end - start + 1))) << start;
  63 }
  64
  65 static inline uint64_t
  66 __gen_uint(uint64_t v, uint32_t start, uint32_t end)
  67 {
  68    __gen_validate_value(v);
  69
  70 #if DEBUG
  71    const int width = end - start + 1;
  72    if (width < 64) {
  73       const uint64_t max = (1ull << width) - 1;
  74       assert(v <= max);
  75    }
  76 #endif
  77
  78    return v << start;
  79 }
  80
  81 static inline uint64_t
  82 __gen_sint(int64_t v, uint32_t start, uint32_t end)
  83 {
  84    const int width = end - start + 1;
  85
  86    __gen_validate_value(v);
  87
  88 #if DEBUG
  89    if (width < 64) {
  90       const int64_t max = (1ll << (width - 1)) - 1;
  91       const int64_t min = -(1ll << (width - 1));
  92       assert(min <= v && v <= max);
  93    }
  94 #endif
  95
  96    const uint64_t mask = ~0ull >> (64 - width);
  97
  98    return (v & mask) << start;
  99 }
 100
 101 static inline uint64_t
 102 __gen_offset(uint64_t v, uint32_t start, uint32_t end)
 103 {
 104    __gen_validate_value(v);
 105 #if DEBUG
 106    uint64_t mask = (~0ull >> (64 - (end - start + 1))) << start;
 107
 108    assert((v & ~mask) == 0);
 109 #endif
 110
 111    return v;
 112 }
 113
 114 static inline uint32_t
 115 __gen_float(float v)
 116 {
 117    __gen_validate_value(v);
 118    return ((union __gen_value) { .f = (v) }).dw;
 119 }
 120
 121 static inline uint64_t
 122 __gen_sfixed(float v, uint32_t start, uint32_t end, uint32_t fract_bits)
 123 {
 124    __gen_validate_value(v);
 125
 126    const float factor = (1 << fract_bits);
 127
 128 #if DEBUG
 129    const float max = ((1 << (end - start)) - 1) / factor;
 130    const float min = -(1 << (end - start)) / factor;
 131    assert(min <= v && v <= max);
 132 #endif
 133
 134    const int32_t int_val = roundf(v * factor);
 135    const uint64_t mask = ~0ull >> (64 - (end - start + 1));
 136
 137    return (int_val & mask) << start;
 138 }
 139
 140 static inline uint64_t
 141 __gen_ufixed(float v, uint32_t start, uint32_t end, uint32_t fract_bits)
 142 {
 143    __gen_validate_value(v);
 144
 145    const float factor = (1 << fract_bits);
 146
 147 #if DEBUG
 148    const float max = ((1 << (end - start + 1)) - 1) / factor;
 149    const float min = 0.0f;
 150    assert(min <= v && v <= max);
 151 #endif
 152
 153    const uint32_t uint_val = roundf(v * factor);
 154
 155    return uint_val << start;
 156 }
 157
 158 #ifndef __gen_address_type
 159 #error #define __gen_address_type before including this file
 160 #endif
 161
 162 #ifndef __gen_user_data
 163 #error #define __gen_combine_address before including this file
 164 #endif
 165
 166 #endif
 167
 168 """
 169
 170 def to_alphanum(name):
 171     substitutions = {
 172         ' ': '',
 173         '/': '',
 174         '[': '',
 175         ']': '',
 176         '(': '',
 177         ')': '',
 178         '-': '',
 179         ':': '',
 180         '.': '',
 181         ',': '',
 182         '=': '',
 183         '>': '',
 184         '#': '',
 185         'α': 'alpha',
 186         '&': '',
 187         '*': '',
 188         '"': '',
 189         '+': '',
 190         '\'': '',
 191     }
 192
 193     for i, j in substitutions.items():
 194         name = name.replace(i, j)
 195
 196     return name
 197
 198 def safe_name(name):
 199     name = to_alphanum(name)
 200     if not str.isalpha(name[0]):
 201         name = '_' + name
 202
 203     return name
 204
 205 class Field:
 206     ufixed_pattern = re.compile("u(\d+)\.(\d+)")
 207     sfixed_pattern = re.compile("s(\d+)\.(\d+)")
 208
 209     def __init__(self, parser, attrs):
 210         self.parser = parser
 211         if "name" in attrs:
 212             self.name = safe_name(attrs["name"])
 213         self.start = int(attrs["start"])
 214         self.end = int(attrs["end"])
 215         self.type = attrs["type"]
 216
 217         if "prefix" in attrs:
 218             self.prefix = attrs["prefix"]
 219         else:
 220             self.prefix = None
 221
 222         if "default" in attrs:
 223             self.default = int(attrs["default"])
 224         else:
 225             self.default = None
 226
 227         ufixed_match = Field.ufixed_pattern.match(self.type)
 228         if ufixed_match:
 229             self.type = 'ufixed'
 230             self.fractional_size = int(ufixed_match.group(2))
 231
 232         sfixed_match = Field.sfixed_pattern.match(self.type)
 233         if sfixed_match:
 234             self.type = 'sfixed'
 235             self.fractional_size = int(sfixed_match.group(2))
 236
 237     def emit_template_struct(self, dim):
 238         if self.type == 'address':
 239             type = '__gen_address_type'
 240         elif self.type == 'bool':
 241             type = 'bool'
 242         elif self.type == 'float':
 243             type = 'float'
 244         elif self.type == 'ufixed':
 245             type = 'float'
 246         elif self.type == 'sfixed':
 247             type = 'float'
 248         elif self.type == 'uint' and self.end - self.start > 32:
 249             type = 'uint64_t'
 250         elif self.type == 'offset':
 251             type = 'uint64_t'
 252         elif self.type == 'int':
 253             type = 'int32_t'
 254         elif self.type == 'uint':
 255             type = 'uint32_t'
 256         elif self.type in self.parser.structs:
 257             type = 'struct ' + self.parser.gen_prefix(safe_name(self.type))
 258         elif self.type == 'mbo':
 259             return
 260         else:
 261             print("#error unhandled type: %s" % self.type)
 262
 263         print("   %-36s %s%s;" % (type, self.name, dim))
 264
 265         if len(self.values) > 0 and self.default == None:
 266             if self.prefix:
 267                 prefix = self.prefix + "_"
 268             else:
 269                 prefix = ""
 270
 271         for value in self.values:
 272             print("#define %-40s %d" % (prefix + value.name, value.value))
 273
 274 class Group:
 275     def __init__(self, parser, parent, start, count, size):
 276         self.parser = parser
 277         self.parent = parent
 278         self.start = start
 279         self.count = count
 280         self.size = size
 281         self.fields = []
 282
 283     def emit_template_struct(self, dim):
 284         if self.count == 0:
 285             print("   /* variable length fields follow */")
 286         else:
 287             if self.count > 1:
 288                 dim = "%s[%d]" % (dim, self.count)
 289
 290             for field in self.fields:
 291                 field.emit_template_struct(dim)
 292
 293     class DWord:
 294         def __init__(self):
 295             self.size = 32
 296             self.fields = []
 297             self.address = None
 298
 299     def collect_dwords(self, dwords, start, dim):
 300         for field in self.fields:
 301             if type(field) is Group:
 302                 if field.count == 1:
 303                     field.collect_dwords(dwords, start + field.start, dim)
 304                 else:
 305                     for i in range(field.count):
 306                         field.collect_dwords(dwords,
 307                                              start + field.start + i * field.size,
 308                                              "%s[%d]" % (dim, i))
 309                 continue
 310
 311             index = (start + field.start) // 32
 312             if not index in dwords:
 313                 dwords[index] = self.DWord()
 314
 315             clone = copy.copy(field)
 316             clone.start = clone.start + start
 317             clone.end = clone.end + start
 318             clone.dim = dim
 319             dwords[index].fields.append(clone)
 320
 321             if field.type == "address":
 322                 # assert dwords[index].address == None
 323                 dwords[index].address = field
 324
 325             # Coalesce all the dwords covered by this field. The two cases we
 326             # handle are where multiple fields are in a 64 bit word (typically
 327             # and address and a few bits) or where a single struct field
 328             # completely covers multiple dwords.
 329             while index < (start + field.end) // 32:
 330                 if index + 1 in dwords and not dwords[index] == dwords[index + 1]:
 331                     dwords[index].fields.extend(dwords[index + 1].fields)
 332                 dwords[index].size = 64
 333                 dwords[index + 1] = dwords[index]
 334                 index = index + 1
 335
 336     def emit_pack_function(self, start):
 337         dwords = {}
 338         self.collect_dwords(dwords, 0, "")
 339
 340         # Determine number of dwords in this group. If we have a size, use
 341         # that, since that'll account for MBZ dwords at the end of a group
 342         # (like dword 8 on BDW+ 3DSTATE_HS). Otherwise, use the largest dword
 343         # index we've seen plus one.
 344         if self.size > 0:
 345             length = self.size // 32
 346         else:
 347             length = max(dwords.keys()) + 1
 348
 349         for index in range(length):
 350             # Handle MBZ dwords
 351             if not index in dwords:
 352                 print("")
 353                 print("   dw[%d] = 0;" % index)
 354                 continue
 355
 356             # For 64 bit dwords, we aliased the two dword entries in the dword
 357             # dict it occupies. Now that we're emitting the pack function,
 358             # skip the duplicate entries.
 359             dw = dwords[index]
 360             if index > 0 and index - 1 in dwords and dw == dwords[index - 1]:
 361                 continue
 362
 363             # Special case: only one field and it's a struct at the beginning
 364             # of the dword. In this case we pack directly into the
 365             # destination. This is the only way we handle embedded structs
 366             # larger than 32 bits.
 367             if len(dw.fields) == 1:
 368                 field = dw.fields[0]
 369                 name = field.name + field.dim
 370                 if field.type in self.parser.structs and field.start % 32 == 0:
 371                     print("")
 372                     print("   %s_pack(data, &dw[%d], &values->%s);" %
 373                           (self.parser.gen_prefix(safe_name(field.type)), index, name))
 374                     continue
 375
 376             # Pack any fields of struct type first so we have integer values
 377             # to the dword for those fields.
 378             field_index = 0
 379             for field in dw.fields:
 380                 if type(field) is Field and field.type in self.parser.structs:
 381                     name = field.name + field.dim
 382                     print("")
 383                     print("   uint32_t v%d_%d;" % (index, field_index))
 384                     print("   %s_pack(data, &v%d_%d, &values->%s);" %
 385                           (self.parser.gen_prefix(safe_name(field.type)), index, field_index, name))
 386                     field_index = field_index + 1
 387
 388             print("")
 389             dword_start = index * 32
 390             if dw.address == None:
 391                 address_count = 0
 392             else:
 393                 address_count = 1
 394
 395             if dw.size == 32 and dw.address == None:
 396                 v = None
 397                 print("   dw[%d] =" % index)
 398             elif len(dw.fields) > address_count:
 399                 v = "v%d" % index
 400                 print("   const uint%d_t %s =" % (dw.size, v))
 401             else:
 402                 v = "0"
 403
 404             field_index = 0
 405             for field in dw.fields:
 406                 if field.type != "mbo":
 407                     name = field.name + field.dim
 408
 409                 if field.type == "mbo":
 410                     s = "__gen_mbo(%d, %d)" % \
 411                         (field.start - dword_start, field.end - dword_start)
 412                 elif field.type == "address":
 413                     s = None
 414                 elif field.type == "uint":
 415                     s = "__gen_uint(values->%s, %d, %d)" % \
 416                         (name, field.start - dword_start, field.end - dword_start)
 417                 elif field.type == "int":
 418                     s = "__gen_sint(values->%s, %d, %d)" % \
 419                         (name, field.start - dword_start, field.end - dword_start)
 420                 elif field.type == "bool":
 421                     s = "__gen_uint(values->%s, %d, %d)" % \
 422                         (name, field.start - dword_start, field.end - dword_start)
 423                 elif field.type == "float":
 424                     s = "__gen_float(values->%s)" % name
 425                 elif field.type == "offset":
 426                     s = "__gen_offset(values->%s, %d, %d)" % \
 427                         (name, field.start - dword_start, field.end - dword_start)
 428                 elif field.type == 'ufixed':
 429                     s = "__gen_ufixed(values->%s, %d, %d, %d)" % \
 430                         (name, field.start - dword_start, field.end - dword_start, field.fractional_size)
 431                 elif field.type == 'sfixed':
 432                     s = "__gen_sfixed(values->%s, %d, %d, %d)" % \
 433                         (name, field.start - dword_start, field.end - dword_start, field.fractional_size)
 434                 elif field.type in self.parser.structs:
 435                     s = "__gen_uint(v%d_%d, %d, %d)" % \
 436                         (index, field_index, field.start - dword_start, field.end - dword_start)
 437                     field_index = field_index + 1
 438                 else:
 439                     print("/* unhandled field %s, type %s */\n" % (name, field.type))
 440                     s = None
 441
 442                 if not s == None:
 443                     if field == dw.fields[-1]:
 444                         print("      %s;" % s)
 445                     else:
 446                         print("      %s |" % s)
 447
 448             if dw.size == 32:
 449                 if dw.address:
 450                     print("   dw[%d] = __gen_combine_address(data, &dw[%d], values->%s, %s);" % (index, index, dw.address.name, v))
 451                 continue
 452
 453             if dw.address:
 454                 v_address = "v%d_address" % index
 455                 print("   const uint64_t %s =\n      __gen_combine_address(data, &dw[%d], values->%s, %s);" %
 456                       (v_address, index, dw.address.name, v))
 457                 v = v_address
 458
 459             print("   dw[%d] = %s;" % (index, v))
 460             print("   dw[%d] = %s >> 32;" % (index + 1, v))
 461
 462 class Value:
 463     def __init__(self, attrs):
 464         self.name = safe_name(attrs["name"])
 465         self.value = int(attrs["value"])
 466
 467 class Parser:
 468     def __init__(self):
 469         self.parser = xml.parsers.expat.ParserCreate()
 470         self.parser.StartElementHandler = self.start_element
 471         self.parser.EndElementHandler = self.end_element
 472
 473         self.instruction = None
 474         self.structs = {}
 475
 476     def start_element(self, name, attrs):
 477         if name == "genxml":
 478             self.platform = attrs["name"]
 479             self.gen = attrs["gen"].replace('.', '')
 480             print(pack_header % {'license': license, 'platform': self.platform})
 481         elif name == "instruction":
 482             self.instruction = safe_name(attrs["name"])
 483             self.length_bias = int(attrs["bias"])
 484             if "length" in attrs:
 485                 self.length = int(attrs["length"])
 486                 size = self.length * 32
 487             else:
 488                 self.length = None
 489                 size = 0
 490             self.group = Group(self, None, 0, 1, size)
 491         elif name == "struct":
 492             self.struct = safe_name(attrs["name"])
 493             self.structs[attrs["name"]] = 1
 494             if "length" in attrs:
 495                 self.length = int(attrs["length"])
 496                 size = self.length * 32
 497             else:
 498                 self.length = None
 499                 size = 0
 500             self.group = Group(self, None, 0, 1, size)
 501
 502         elif name == "group":
 503             group = Group(self, self.group,
 504                           int(attrs["start"]), int(attrs["count"]), int(attrs["size"]))
 505             self.group.fields.append(group)
 506             self.group = group
 507         elif name == "field":
 508             self.group.fields.append(Field(self, attrs))
 509             self.values = []
 510         elif name == "enum":
 511             self.values = []
 512             self.enum = safe_name(attrs["name"])
 513             if "prefix" in attrs:
 514                 self.prefix = safe_name(attrs["prefix"])
 515             else:
 516                 self.prefix= None
 517         elif name == "value":
 518             self.values.append(Value(attrs))
 519
 520     def end_element(self, name):
 521         if name  == "instruction":
 522             self.emit_instruction()
 523             self.instruction = None
 524             self.group = None
 525         elif name  == "struct":
 526             self.emit_struct()
 527             self.struct = None
 528             self.group = None
 529         elif name == "group":
 530             self.group = self.group.parent
 531         elif name  == "field":
 532             self.group.fields[-1].values = self.values
 533         elif name  == "enum":
 534             self.emit_enum()
 535             self.enum = None
 536
 537     def gen_prefix(self, name):
 538         if name[0] == "_":
 539             return 'GEN%s%s' % (self.gen, name)
 540         else:
 541             return 'GEN%s_%s' % (self.gen, name)
 542
 543     def emit_template_struct(self, name, group):
 544         print("struct %s {" % self.gen_prefix(name))
 545         group.emit_template_struct("")
 546         print("};\n")
 547
 548     def emit_pack_function(self, name, group):
 549         name = self.gen_prefix(name)
 550         print("static inline void\n%s_pack(__gen_user_data *data, void * restrict dst,\n%sconst struct %s * restrict values)\n{" %
 551               (name, ' ' * (len(name) + 6), name))
 552
 553         # Cast dst to make header C++ friendly
 554         print("   uint32_t * restrict dw = (uint32_t * restrict) dst;")
 555
 556         group.emit_pack_function(0)
 557
 558         print("}\n")
 559
 560     def emit_instruction(self):
 561         name = self.instruction
 562         if not self.length == None:
 563             print('#define %-33s %4d' %
 564                   (self.gen_prefix(name + "_length"), self.length))
 565         print('#define %-33s %4d' %
 566               (self.gen_prefix(name + "_length_bias"), self.length_bias))
 567
 568         default_fields = []
 569         for field in self.group.fields:
 570             if not type(field) is Field:
 571                 continue
 572             if field.default == None:
 573                 continue
 574             default_fields.append("   .%-35s = %4d" % (field.name, field.default))
 575
 576         if default_fields:
 577             print('#define %-40s\\' % (self.gen_prefix(name + '_header')))
 578             print(",  \\\n".join(default_fields))
 579             print('')
 580
 581         self.emit_template_struct(self.instruction, self.group)
 582
 583         self.emit_pack_function(self.instruction, self.group)
 584
 585     def emit_struct(self):
 586         name = self.struct
 587         if not self.length == None:
 588             print('#define %-33s %4d' %
 589                   (self.gen_prefix(name + "_length"), self.length))
 590
 591         self.emit_template_struct(self.struct, self.group)
 592         self.emit_pack_function(self.struct, self.group)
 593
 594     def emit_enum(self):
 595         print('/* enum %s */' % self.gen_prefix(self.enum))
 596         for value in self.values:
 597             if self.prefix:
 598                 name = self.prefix + "_" + value.name
 599             else:
 600                 name = value.name
 601             print('#define %-36s %4d' % (name.upper(), value.value))
 602         print('')
 603
 604     def parse(self, filename):
 605         file = open(filename, "rb")
 606         self.parser.ParseFile(file)
 607         file.close()
 608
 609 if len(sys.argv) < 2:
 610     print("No input xml file specified")
 611     sys.exit(1)
 612
 613 input_file = sys.argv[1]
 614
 615 p = Parser()
 616 p.parse(input_file)