blob: 45e1abeed781776bc01eceb8f61c7a8cffdb92df (
about) (
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
|
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2021 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2022, 2023 Efraim Flashner <efraim@flashner.co.il>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (guix cpu)
#:use-module (guix sets)
#:use-module (guix memoization)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-9)
#:use-module (ice-9 match)
#:use-module (ice-9 rdelim)
#:export (current-cpu
cpu?
cpu-architecture
cpu-vendor
cpu-family
cpu-model
cpu-flags
cpu->gcc-architecture))
;;; Commentary:
;;;
;;; This module provides tools to determine the micro-architecture supported
;;; by the CPU and to map it to a name known to GCC's '-march'.
;;;
;;; Code:
;; CPU description.
(define-record-type <cpu>
(cpu architecture vendor family model flags)
cpu?
(architecture cpu-architecture) ;string, from 'uname'
(vendor cpu-vendor) ;string
(family cpu-family) ;integer
(model cpu-model) ;integer
(flags cpu-flags)) ;set of strings
(define current-cpu
(mlambda ()
"Return a <cpu> record representing the host CPU."
(define (prefix? prefix)
(lambda (str)
(string-prefix? prefix str)))
(call-with-input-file "/proc/cpuinfo"
(lambda (port)
(let loop ((vendor #f)
(family #f)
(model #f)
(flags (set)))
(match (read-line port)
((? eof-object?)
(cpu (utsname:machine (uname))
vendor family model flags))
;; vendor for x86_64 and i686
((? (prefix? "vendor_id") str)
(match (string-tokenize str)
(("vendor_id" ":" vendor)
(loop vendor family model flags))))
;; vendor for aarch64 and armhf
((? (prefix? "CPU implementer") str)
(match (string-tokenize str)
(("CPU" "implementer" ":" vendor)
(loop vendor family model flags))))
;; family for x86_64 and i686
((? (prefix? "cpu family") str)
(match (string-tokenize str)
(("cpu" "family" ":" family)
(loop vendor (string->number family) model flags))))
;; model for x86_64 and i686
((? (prefix? "model") str)
(match (string-tokenize str)
(("model" ":" model)
(loop vendor family (string->number model) flags))
(_
(loop vendor family model flags))))
;; model for aarch64 and armhf
((? (prefix? "CPU part") str)
(match (string-tokenize str)
(("CPU" "part" ":" model)
(loop vendor family (string->number (string-drop model 2) 16) flags))))
;; flags for x86_64 and i686
((? (prefix? "flags") str)
(match (string-tokenize str)
(("flags" ":" flags ...)
(loop vendor family model (list->set flags)))))
;; flags for aarch64 and armhf
((? (prefix? "Features") str)
(match (string-tokenize str)
(("Features" ":" flags ...)
(loop vendor family model (list->set flags)))))
(_
(loop vendor family model flags))))))))
(define (cpu->gcc-architecture cpu)
"Return the architecture name, suitable for GCC's '-march' flag, that
corresponds to CPU, a record as returned by 'current-cpu'."
(match (cpu-architecture cpu)
("x86_64"
;; Transcribed from GCC's 'host_detect_local_cpu' in driver-i386.cc.
(or (and (equal? "GenuineIntel" (cpu-vendor cpu))
(= 6 (cpu-family cpu)) ;the "Pentium Pro" family
(letrec-syntax ((if-flags (syntax-rules (=>)
((_)
#f)
((_ (flags ... => name) rest ...)
(if (every (lambda (flag)
(set-contains? (cpu-flags cpu)
flag))
'(flags ...))
name
(if-flags rest ...))))))
(if-flags ("avx" "raoint" => "grandridge")
("avx" "amx_fp16" => "graniterapids")
("avx" "avxvnniint8" => "sierraforest")
("avx" "avx512vp2intersect" => "tigerlake")
("avx" "tsxldtrk" => "sapphirerapids")
("avx" "avx512bf16" => "cooperlake")
("avx" "wbnoinvd" => "icelake-server")
("avx" "avx512bitalg" => "icelake-client")
("avx" "avx512vbmi" => "cannonlake")
("avx" "avx5124vnniw" => "knm")
("avx" "avx512er" => "knl")
("avx" "avx512f" => "skylake-avx512")
("avx" "serialize" => "alderlake")
("avx" "clflushopt" => "skylake")
("avx" "adx" => "broadwell")
("avx" "avx2" => "haswell")
("avx" => "sandybridge")
("sse4_2" "gfni" => "tremont")
("sse4_2" "sgx" => "goldmont-plus")
("sse4_2" "xsave" => "goldmont")
("sse4_2" "movbe" => "silvermont")
("sse4_2" => "nehalem")
("ssse3" "movbe" => "bonnell")
("ssse3" => "core2")
("longmode" => "x86-64")
("lm" => "x86-64"))))
(and (equal? "AuthenticAMD" (cpu-vendor cpu))
(letrec-syntax ((if-flags (syntax-rules (=>)
((_)
#f)
((_ (flags ... => name) rest ...)
(if (every (lambda (flag)
(set-contains? (cpu-flags cpu)
flag))
'(flags ...))
name
(if-flags rest ...))))))
(or (and (= 22 (cpu-family cpu))
(if-flags ("movbe" => "btver2")))
(and (= 6 (cpu-family cpu))
(if-flags ("3dnowp" => "athalon")
("longmode" "sse3" => "k8-sse3")
("lm" "sse3" => "k8-sse3")
("longmode" => "k8")
("lm" => "k8")))
(if-flags ("avx512f" => "znver4")
("vaes" => "znver3")
("clwb" => "znver2")
("clzero" => "znver1")
("avx2" => "bdver4")
("xsaveopt" => "bdver3")
("bmi" => "bdver2")
("xop" => "bdver1")
("sse4a" "has_ssse3" => "btver1")
("sse4a" => "amdfam10")
("sse2" "sse3" => "k8-sse3")
("longmode" "sse3" => "k8-sse3")
("lm" "sse3" => "k8-sse3")
("sse2" => "k8")
("longmode" => "k8")
("lm" => "k8")
("mmx" "3dnow" => "k6-3")
("mmx" => "k6")
(_ => "pentium")))))
;; Fallback case for non-Intel processors or for Intel processors not
;; recognized above.
(letrec-syntax ((if-flags (syntax-rules (=>)
((_)
#f)
((_ (flags ... => name) rest ...)
(if (every (lambda (flag)
(set-contains? (cpu-flags cpu)
flag))
'(flags ...))
name
(if-flags rest ...))))))
(if (and (= 7 (cpu-family cpu))
(= #x3b (cpu-model cpu)))
"lujiazui"
(if-flags ("avx512" => "knl")
("adx" => "broadwell")
("avx2" => "haswell")
;; TODO: tigerlake, cooperlake, etc.
("avx" => "sandybridge")
("sse4_2" "gfni" => "tremont")
("sse4_2" "sgx" => "goldmont-plus")
("sse4_2" "xsave" => "goldmont")
("sse4_2" "movbe" => "silvermont")
("sse4_2" => "nehalem")
("ssse3" "movbe" => "bonnell")
("ssse3" "sse3" "longmode" => "nocona")
("ssse3" "sse3" "lm" => "nocona")
("ssse3" "sse3" => "prescott")
("ssse3" => "core2"))))
;; TODO: Recognize CENTAUR/CYRIX/NSC?
"x86_64"))
("aarch64"
;; Transcribed from GCC's list of aarch64 processors in aarch64-cores.def
;; What to do with big.LITTLE cores?
(match (cpu-vendor cpu)
("0x41"
(match (cpu-model cpu)
((or #xd02 #xd04 #xd03 #xd07 #xd08 #xd09)
"armv8-a")
((or #xd05 #xd0a #xd0b #xd0e #xd0d #xd41 #xd42 #xd4b #xd06 #xd43 #xd44
#xd4c #xd0c #xd4a)
"armv8.2-a")
(#xd40
"armv8.4-a")
(#xd15
"armv8-r")
((or #xd46 #xd47 #xd4d #xd48 #xd4e #xd49 #xd4f)
"armv9-a")))
("0x42"
"armv8.1-a")
("0x43"
(match (cpu-model cpu)
((or #x0a0 #x0a1 #x0a2 #x0a3)
"armv8-a")
(#x0af
"armv8.1-a")
((or #x0b0 #x0b1 #x0b2 #x0b3 #x0b4 #x0b5)
"armv8.2-a")
(#x0b8
"armv8.3-a")))
("0x46"
"armv8.2-a")
("0x48"
"armv8.2-a")
("0x50"
"armv8-a")
("0x51"
(match (cpu-model cpu)
(#xC00
"armv8-a")
(#x516
"armv8.1-a")
(#xC01
"armv8.4-a")))
("0x53"
"armv8-a")
("0x68"
"armv8-a")
("0xC0"
"armv8.6-a")
("0xC00"
"armv8-a")
(_
"armv8-a"))
"armv8-a")
(architecture
;; TODO: More architectures
architecture)))
|
