summaryrefslogtreecommitdiffstats
path: root/src/amd/vulkan/radv_entrypoints_gen.py
blob: ec798157f94ad6f97179b69a3a23a1e777d50d79 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
# coding=utf-8
#
# Copyright © 2015 Intel Corporation
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice (including the next
# paragraph) shall be included in all copies or substantial portions of the
# Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
#

import sys
import xml.etree.ElementTree as ET

max_api_version = 1.0

supported_extensions = [
   'VK_AMD_draw_indirect_count',
   'VK_NV_dedicated_allocation',
   'VK_KHR_descriptor_update_template',
   'VK_KHR_get_physical_device_properties2',
   'VK_KHR_incremental_present',
   'VK_KHR_maintenance1',
   'VK_KHR_push_descriptor',
   'VK_KHR_sampler_mirror_clamp_to_edge',
   'VK_KHR_shader_draw_parameters',
   'VK_KHR_surface',
   'VK_KHR_swapchain',
   'VK_KHR_wayland_surface',
   'VK_KHR_xcb_surface',
   'VK_KHR_xlib_surface',
   'VK_KHR_get_memory_requirements2',
   'VK_KHR_dedicated_allocation',
   'VK_KHR_external_memory_capabilities',
   'VK_KHR_external_memory',
   'VK_KHR_external_memory_fd',
   'VK_KHR_storage_buffer_storage_class',
]

# We generate a static hash table for entry point lookup
# (vkGetProcAddress). We use a linear congruential generator for our hash
# function and a power-of-two size table. The prime numbers are determined
# experimentally.

none = 0xffff
hash_size = 256
u32_mask = 2**32 - 1
hash_mask = hash_size - 1

prime_factor = 5024183
prime_step = 19

def hash(name):
    h = 0;
    for c in name:
        h = (h * prime_factor + ord(c)) & u32_mask

    return h

def print_guard_start(guard):
    if guard is not None:
        print "#ifdef {0}".format(guard)

def print_guard_end(guard):
    if guard is not None:
        print "#endif // {0}".format(guard)

opt_header = False
opt_code = False

if (sys.argv[1] == "header"):
    opt_header = True
    sys.argv.pop()
elif (sys.argv[1] == "code"):
    opt_code = True
    sys.argv.pop()

# Extract the entry points from the registry
def get_entrypoints(doc, entrypoints_to_defines):
    entrypoints = []

    enabled_commands = set()
    for feature in doc.findall('./feature'):
        assert feature.attrib['api'] == 'vulkan'
        if float(feature.attrib['number']) > max_api_version:
            continue

        for command in feature.findall('./require/command'):
            enabled_commands.add(command.attrib['name'])

    for extension in doc.findall('.extensions/extension'):
        if extension.attrib['name'] not in supported_extensions:
            continue

        assert extension.attrib['supported'] == 'vulkan'
        for command in extension.findall('./require/command'):
            enabled_commands.add(command.attrib['name'])

    index = 0
    for command in doc.findall('./commands/command'):
        type = command.find('./proto/type').text
        fullname = command.find('./proto/name').text

        if fullname not in enabled_commands:
            continue

        shortname = fullname[2:]
        params = map(lambda p: "".join(p.itertext()), command.findall('./param'))
        params = ', '.join(params)
        if fullname in entrypoints_to_defines:
            guard = entrypoints_to_defines[fullname]
        else:
            guard = None
        entrypoints.append((type, shortname, params, index, hash(fullname), guard))
        index += 1

    return entrypoints

# Maps entry points to extension defines
def get_entrypoints_defines(doc):
    entrypoints_to_defines = {}
    extensions = doc.findall('./extensions/extension')
    for extension in extensions:
        define = extension.get('protect')
        entrypoints = extension.findall('./require/command')
        for entrypoint in entrypoints:
            fullname = entrypoint.get('name')
            entrypoints_to_defines[fullname] = define
    return entrypoints_to_defines

doc = ET.parse(sys.stdin)
entrypoints = get_entrypoints(doc, get_entrypoints_defines(doc))

# For outputting entrypoints.h we generate a radv_EntryPoint() prototype
# per entry point.

if opt_header:
    print "/* This file generated from vk_gen.py, don't edit directly. */\n"

    print "struct radv_dispatch_table {"
    print "   union {"
    print "      void *entrypoints[%d];" % len(entrypoints)
    print "      struct {"

    for type, name, args, num, h, guard in entrypoints:
        if guard is not None:
            print "#ifdef {0}".format(guard)
            print "         PFN_vk{0} {0};".format(name)
            print "#else"
            print "         void *{0};".format(name)
            print "#endif"
        else:
            print "         PFN_vk{0} {0};".format(name)
    print "      };\n"
    print "   };\n"
    print "};\n"

    for type, name, args, num, h, guard in entrypoints:
        print_guard_start(guard)
        print "%s radv_%s(%s);" % (type, name, args)
        print_guard_end(guard)
    exit()



print """/*
 * Copyright © 2015 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

/* DO NOT EDIT! This is a generated file. */

#include "radv_private.h"

struct radv_entrypoint {
   uint32_t name;
   uint32_t hash;
};

/* We use a big string constant to avoid lots of reloctions from the entry
 * point table to lots of little strings. The entries in the entry point table
 * store the index into this big string.
 */

static const char strings[] ="""

offsets = []
i = 0;
for type, name, args, num, h, guard in entrypoints:
    print "   \"vk%s\\0\"" % name
    offsets.append(i)
    i += 2 + len(name) + 1
print "   ;"

# Now generate the table of all entry points

print "\nstatic const struct radv_entrypoint entrypoints[] = {"
for type, name, args, num, h, guard in entrypoints:
    print "   { %5d, 0x%08x }," % (offsets[num], h)
print "};\n"

print """

/* Weak aliases for all potential implementations. These will resolve to
 * NULL if they're not defined, which lets the resolve_entrypoint() function
 * either pick the correct entry point.
 */
"""

for layer in [ "radv" ]:
    for type, name, args, num, h, guard in entrypoints:
        print_guard_start(guard)
        print "%s %s_%s(%s) __attribute__ ((weak));" % (type, layer, name, args)
        print_guard_end(guard)
    print "\nconst struct radv_dispatch_table %s_layer = {" % layer
    for type, name, args, num, h, guard in entrypoints:
        print_guard_start(guard)
        print "   .%s = %s_%s," % (name, layer, name)
        print_guard_end(guard)
    print "};\n"

print """

static void * __attribute__ ((noinline))
radv_resolve_entrypoint(uint32_t index)
{
   return radv_layer.entrypoints[index];
}
"""

# Now generate the hash table used for entry point look up.  This is a
# uint16_t table of entry point indices. We use 0xffff to indicate an entry
# in the hash table is empty.

map = [none for f in xrange(hash_size)]
collisions = [0 for f in xrange(10)]
for type, name, args, num, h, guard in entrypoints:
    level = 0
    while map[h & hash_mask] != none:
        h = h + prime_step
        level = level + 1
    if level > 9:
        collisions[9] += 1
    else:
        collisions[level] += 1
    map[h & hash_mask] = num

print "/* Hash table stats:"
print " * size %d entries" % hash_size
print " * collisions  entries"
for i in xrange(10):
    if (i == 9):
        plus = "+"
    else:
        plus = " "

    print " *     %2d%s     %4d" % (i, plus, collisions[i])
print " */\n"

print "#define none 0x%04x\n" % none

print "static const uint16_t map[] = {"
for i in xrange(0, hash_size, 8):
    print "   ",
    for j in xrange(i, i + 8):
        if map[j] & 0xffff == 0xffff:
            print "  none,",
        else:
            print "0x%04x," % (map[j] & 0xffff),
    print

print "};"    

# Finally we generate the hash table lookup function.  The hash function and
# linear probing algorithm matches the hash table generated above.

print """
void *
radv_lookup_entrypoint(const char *name)
{
   static const uint32_t prime_factor = %d;
   static const uint32_t prime_step = %d;
   const struct radv_entrypoint *e;
   uint32_t hash, h, i;
   const char *p;

   hash = 0;
   for (p = name; *p; p++)
      hash = hash * prime_factor + *p;

   h = hash;
   do {
      i = map[h & %d];
      if (i == none)
         return NULL;
      e = &entrypoints[i];
      h += prime_step;
   } while (e->hash != hash);

   if (strcmp(name, strings + e->name) != 0)
      return NULL;

   return radv_resolve_entrypoint(i);
}
""" % (prime_factor, prime_step, hash_mask)