1 /* 1
2 * Copyright (c) Facebook, Inc.
3 * All rights reserved.
4 *
5 * This source code is licensed under both the
6 * LICENSE file in the root directory of this
7 * in the COPYING file in the root directory o
8 * You may select, at your option, one of the
9 */
10
11 #ifndef ZSTD_COMMON_CPU_H
12 #define ZSTD_COMMON_CPU_H
13
14 /*
15 * Implementation taken from folly/CpuId.h
16 * https://github.com/facebook/folly/blob/mast
17 */
18
19 #include "mem.h"
20
21
22 typedef struct {
23 U32 f1c;
24 U32 f1d;
25 U32 f7b;
26 U32 f7c;
27 } ZSTD_cpuid_t;
28
29 MEM_STATIC ZSTD_cpuid_t ZSTD_cpuid(void) {
30 U32 f1c = 0;
31 U32 f1d = 0;
32 U32 f7b = 0;
33 U32 f7c = 0;
34 #if defined(__i386__) && defined(__PIC__) && !
35 /* The following block like the normal cpu
36 * reserves ebx for use of its pic registe
37 * handle the save and restore to avoid cl
38 */
39 U32 n;
40 __asm__(
41 "pushl %%ebx\n\t"
42 "cpuid\n\t"
43 "popl %%ebx\n\t"
44 : "=a"(n)
45 : "a"(0)
46 : "ecx", "edx");
47 if (n >= 1) {
48 U32 f1a;
49 __asm__(
50 "pushl %%ebx\n\t"
51 "cpuid\n\t"
52 "popl %%ebx\n\t"
53 : "=a"(f1a), "=c"(f1c), "=d"(f1d)
54 : "a"(1));
55 }
56 if (n >= 7) {
57 __asm__(
58 "pushl %%ebx\n\t"
59 "cpuid\n\t"
60 "movl %%ebx, %%eax\n\t"
61 "popl %%ebx"
62 : "=a"(f7b), "=c"(f7c)
63 : "a"(7), "c"(0)
64 : "edx");
65 }
66 #elif defined(__x86_64__) || defined(_M_X64) |
67 U32 n;
68 __asm__("cpuid" : "=a"(n) : "a"(0) : "ebx"
69 if (n >= 1) {
70 U32 f1a;
71 __asm__("cpuid" : "=a"(f1a), "=c"(f1c),
72 }
73 if (n >= 7) {
74 U32 f7a;
75 __asm__("cpuid"
76 : "=a"(f7a), "=b"(f7b), "=c"(f7c
77 : "a"(7), "c"(0)
78 : "edx");
79 }
80 #endif
81 {
82 ZSTD_cpuid_t cpuid;
83 cpuid.f1c = f1c;
84 cpuid.f1d = f1d;
85 cpuid.f7b = f7b;
86 cpuid.f7c = f7c;
87 return cpuid;
88 }
89 }
90
91 #define X(name, r, bit)
92 MEM_STATIC int ZSTD_cpuid_##name(ZSTD_cpuid_
93 return ((cpuid.r) & (1U << bit)) != 0;
94 }
95
96 /* cpuid(1): Processor Info and Feature Bits.
97 #define C(name, bit) X(name, f1c, bit)
98 C(sse3, 0)
99 C(pclmuldq, 1)
100 C(dtes64, 2)
101 C(monitor, 3)
102 C(dscpl, 4)
103 C(vmx, 5)
104 C(smx, 6)
105 C(eist, 7)
106 C(tm2, 8)
107 C(ssse3, 9)
108 C(cnxtid, 10)
109 C(fma, 12)
110 C(cx16, 13)
111 C(xtpr, 14)
112 C(pdcm, 15)
113 C(pcid, 17)
114 C(dca, 18)
115 C(sse41, 19)
116 C(sse42, 20)
117 C(x2apic, 21)
118 C(movbe, 22)
119 C(popcnt, 23)
120 C(tscdeadline, 24)
121 C(aes, 25)
122 C(xsave, 26)
123 C(osxsave, 27)
124 C(avx, 28)
125 C(f16c, 29)
126 C(rdrand, 30)
127 #undef C
128 #define D(name, bit) X(name, f1d, bit)
129 D(fpu, 0)
130 D(vme, 1)
131 D(de, 2)
132 D(pse, 3)
133 D(tsc, 4)
134 D(msr, 5)
135 D(pae, 6)
136 D(mce, 7)
137 D(cx8, 8)
138 D(apic, 9)
139 D(sep, 11)
140 D(mtrr, 12)
141 D(pge, 13)
142 D(mca, 14)
143 D(cmov, 15)
144 D(pat, 16)
145 D(pse36, 17)
146 D(psn, 18)
147 D(clfsh, 19)
148 D(ds, 21)
149 D(acpi, 22)
150 D(mmx, 23)
151 D(fxsr, 24)
152 D(sse, 25)
153 D(sse2, 26)
154 D(ss, 27)
155 D(htt, 28)
156 D(tm, 29)
157 D(pbe, 31)
158 #undef D
159
160 /* cpuid(7): Extended Features. */
161 #define B(name, bit) X(name, f7b, bit)
162 B(bmi1, 3)
163 B(hle, 4)
164 B(avx2, 5)
165 B(smep, 7)
166 B(bmi2, 8)
167 B(erms, 9)
168 B(invpcid, 10)
169 B(rtm, 11)
170 B(mpx, 14)
171 B(avx512f, 16)
172 B(avx512dq, 17)
173 B(rdseed, 18)
174 B(adx, 19)
175 B(smap, 20)
176 B(avx512ifma, 21)
177 B(pcommit, 22)
178 B(clflushopt, 23)
179 B(clwb, 24)
180 B(avx512pf, 26)
181 B(avx512er, 27)
182 B(avx512cd, 28)
183 B(sha, 29)
184 B(avx512bw, 30)
185 B(avx512vl, 31)
186 #undef B
187 #define C(name, bit) X(name, f7c, bit)
188 C(prefetchwt1, 0)
189 C(avx512vbmi, 1)
190 #undef C
191
192 #undef X
193
194 #endif /* ZSTD_COMMON_CPU_H */
195
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