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annotate contrib/python-zstandard/zstd/common/cpu.h @ 37495:b1fb341d8a61

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zstandard: vendor python-zstandard 0.9.0 This was just released. It features a number of goodies. More info at https://gregoryszorc.com/blog/2018/04/09/release-of-python-zstandard-0.9/. The clang-format ignore list was updated to reflect the new source of files. The project contains a vendored copy of zstandard 1.3.4. The old version was 1.1.3. One of the changes between those versions is that zstandard is now dual licensed BSD + GPLv2 and the patent rights grant has been removed. Good riddance. The API should be backwards compatible. So no changes in core should be needed. However, there were a number of changes in the library that we'll want to adapt to. Those will be addressed in subsequent commits. Differential Revision: https://phab.mercurial-scm.org/D3198
author Gregory Szorc <gregory.szorc@gmail.com>
date Mon, 09 Apr 2018 10:13:29 -0700
parents
children 73fef626dae3
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37495
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1 /*
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2 * Copyright (c) 2018-present, Facebook, Inc.
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3 * All rights reserved.
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4 *
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5 * This source code is licensed under both the BSD-style license (found in the
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6 * LICENSE file in the root directory of this source tree) and the GPLv2 (found
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7 * in the COPYING file in the root directory of this source tree).
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8 * You may select, at your option, one of the above-listed licenses.
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9 */
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10
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11 #ifndef ZSTD_COMMON_CPU_H
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12 #define ZSTD_COMMON_CPU_H
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13
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14 /**
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15 * Implementation taken from folly/CpuId.h
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16 * https://github.com/facebook/folly/blob/master/folly/CpuId.h
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17 */
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18
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19 #include <string.h>
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20
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21 #include "mem.h"
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22
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23 #ifdef _MSC_VER
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24 #include <intrin.h>
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25 #endif
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26
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27 typedef struct {
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28 U32 f1c;
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29 U32 f1d;
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30 U32 f7b;
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31 U32 f7c;
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32 } ZSTD_cpuid_t;
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33
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34 MEM_STATIC ZSTD_cpuid_t ZSTD_cpuid(void) {
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35 U32 f1c = 0;
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36 U32 f1d = 0;
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37 U32 f7b = 0;
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38 U32 f7c = 0;
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39 #ifdef _MSC_VER
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40 int reg[4];
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41 __cpuid((int*)reg, 0);
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42 {
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43 int const n = reg[0];
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44 if (n >= 1) {
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45 __cpuid((int*)reg, 1);
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46 f1c = (U32)reg[2];
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47 f1d = (U32)reg[3];
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48 }
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49 if (n >= 7) {
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50 __cpuidex((int*)reg, 7, 0);
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51 f7b = (U32)reg[1];
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52 f7c = (U32)reg[2];
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53 }
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54 }
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55 #elif defined(__i386__) && defined(__PIC__) && !defined(__clang__) && defined(__GNUC__)
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56 /* The following block like the normal cpuid branch below, but gcc
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57 * reserves ebx for use of its pic register so we must specially
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58 * handle the save and restore to avoid clobbering the register
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59 */
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60 U32 n;
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61 __asm__(
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62 "pushl %%ebx\n\t"
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63 "cpuid\n\t"
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64 "popl %%ebx\n\t"
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65 : "=a"(n)
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66 : "a"(0)
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67 : "ecx", "edx");
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68 if (n >= 1) {
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69 U32 f1a;
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70 __asm__(
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71 "pushl %%ebx\n\t"
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72 "cpuid\n\t"
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73 "popl %%ebx\n\t"
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74 : "=a"(f1a), "=c"(f1c), "=d"(f1d)
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75 : "a"(1)
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76 :);
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77 }
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78 if (n >= 7) {
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79 __asm__(
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80 "pushl %%ebx\n\t"
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81 "cpuid\n\t"
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82 "movl %%ebx, %%eax\n\r"
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83 "popl %%ebx"
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84 : "=a"(f7b), "=c"(f7c)
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85 : "a"(7), "c"(0)
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86 : "edx");
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87 }
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88 #elif defined(__x86_64__) || defined(_M_X64) || defined(__i386__)
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89 U32 n;
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90 __asm__("cpuid" : "=a"(n) : "a"(0) : "ebx", "ecx", "edx");
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91 if (n >= 1) {
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92 U32 f1a;
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93 __asm__("cpuid" : "=a"(f1a), "=c"(f1c), "=d"(f1d) : "a"(1) : "ebx");
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94 }
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95 if (n >= 7) {
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96 U32 f7a;
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97 __asm__("cpuid"
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98 : "=a"(f7a), "=b"(f7b), "=c"(f7c)
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99 : "a"(7), "c"(0)
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100 : "edx");
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101 }
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102 #endif
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103 {
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104 ZSTD_cpuid_t cpuid;
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105 cpuid.f1c = f1c;
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106 cpuid.f1d = f1d;
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107 cpuid.f7b = f7b;
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108 cpuid.f7c = f7c;
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109 return cpuid;
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110 }
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111 }
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112
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113 #define X(name, r, bit) \
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114 MEM_STATIC int ZSTD_cpuid_##name(ZSTD_cpuid_t const cpuid) { \
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115 return ((cpuid.r) & (1U << bit)) != 0; \
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116 }
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117
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118 /* cpuid(1): Processor Info and Feature Bits. */
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119 #define C(name, bit) X(name, f1c, bit)
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120 C(sse3, 0)
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121 C(pclmuldq, 1)
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122 C(dtes64, 2)
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123 C(monitor, 3)
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124 C(dscpl, 4)
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125 C(vmx, 5)
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126 C(smx, 6)
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127 C(eist, 7)
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128 C(tm2, 8)
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129 C(ssse3, 9)
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
130 C(cnxtid, 10)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
131 C(fma, 12)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
132 C(cx16, 13)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
133 C(xtpr, 14)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
134 C(pdcm, 15)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
135 C(pcid, 17)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
136 C(dca, 18)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
137 C(sse41, 19)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
138 C(sse42, 20)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
139 C(x2apic, 21)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
140 C(movbe, 22)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
141 C(popcnt, 23)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
142 C(tscdeadline, 24)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
143 C(aes, 25)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
144 C(xsave, 26)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
145 C(osxsave, 27)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
146 C(avx, 28)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
147 C(f16c, 29)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
148 C(rdrand, 30)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
149 #undef C
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
150 #define D(name, bit) X(name, f1d, bit)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
151 D(fpu, 0)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
152 D(vme, 1)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
153 D(de, 2)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
154 D(pse, 3)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
155 D(tsc, 4)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
156 D(msr, 5)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
157 D(pae, 6)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
158 D(mce, 7)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
159 D(cx8, 8)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
160 D(apic, 9)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
161 D(sep, 11)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
162 D(mtrr, 12)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
163 D(pge, 13)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
164 D(mca, 14)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
165 D(cmov, 15)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
166 D(pat, 16)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
167 D(pse36, 17)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
168 D(psn, 18)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
169 D(clfsh, 19)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
170 D(ds, 21)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
171 D(acpi, 22)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
172 D(mmx, 23)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
173 D(fxsr, 24)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
174 D(sse, 25)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
175 D(sse2, 26)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
176 D(ss, 27)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
177 D(htt, 28)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
178 D(tm, 29)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
179 D(pbe, 31)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
180 #undef D
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
181
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
182 /* cpuid(7): Extended Features. */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
183 #define B(name, bit) X(name, f7b, bit)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
184 B(bmi1, 3)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
185 B(hle, 4)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
186 B(avx2, 5)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
187 B(smep, 7)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
188 B(bmi2, 8)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
189 B(erms, 9)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
190 B(invpcid, 10)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
191 B(rtm, 11)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
192 B(mpx, 14)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
193 B(avx512f, 16)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
194 B(avx512dq, 17)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
195 B(rdseed, 18)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
196 B(adx, 19)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
197 B(smap, 20)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
198 B(avx512ifma, 21)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
199 B(pcommit, 22)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
200 B(clflushopt, 23)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
201 B(clwb, 24)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
202 B(avx512pf, 26)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
203 B(avx512er, 27)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
204 B(avx512cd, 28)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
205 B(sha, 29)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
206 B(avx512bw, 30)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
207 B(avx512vl, 31)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
208 #undef B
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
209 #define C(name, bit) X(name, f7c, bit)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
210 C(prefetchwt1, 0)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
211 C(avx512vbmi, 1)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
212 #undef C
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
213
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
214 #undef X
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
215
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
216 #endif /* ZSTD_COMMON_CPU_H */