Vector Optimized Library of Kernels  2.5.0
Architecture-tuned implementations of math kernels
cpuinfo_arm.h
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1 // Copyright 2017 Google LLC
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #ifndef CPU_FEATURES_INCLUDE_CPUINFO_ARM_H_
16 #define CPU_FEATURES_INCLUDE_CPUINFO_ARM_H_
17 
18 #include <stdint.h> // uint32_t
19 
21 #include "cpu_features_macros.h"
22 
24 
25 typedef struct {
26  int swp : 1; // SWP instruction (atomic read-modify-write)
27  int half : 1; // Half-word loads and stores
28  int thumb : 1; // Thumb (16-bit instruction set)
29  int _26bit : 1; // "26 Bit" Model (Processor status register folded into
30  // program counter)
31  int fastmult : 1; // 32x32->64-bit multiplication
32  int fpa : 1; // Floating point accelerator
33  int vfp : 1; // Vector Floating Point.
34  int edsp : 1; // DSP extensions (the 'e' variant of the ARM9 CPUs, and all
35  // others above)
36  int java : 1; // Jazelle (Java bytecode accelerator)
37  int iwmmxt : 1; // Intel Wireless MMX Technology.
38  int crunch : 1; // MaverickCrunch coprocessor
39  int thumbee : 1; // ThumbEE
40  int neon : 1; // Advanced SIMD.
41  int vfpv3 : 1; // VFP version 3
42  int vfpv3d16 : 1; // VFP version 3 with 16 D-registers
43  int tls : 1; // TLS register
44  int vfpv4 : 1; // VFP version 4 with fast context switching
45  int idiva : 1; // SDIV and UDIV hardware division in ARM mode.
46  int idivt : 1; // SDIV and UDIV hardware division in Thumb mode.
47  int vfpd32 : 1; // VFP with 32 D-registers
48  int lpae : 1; // Large Physical Address Extension (>4GB physical memory on
49  // 32-bit architecture)
50  int evtstrm : 1; // kernel event stream using generic architected timer
51  int aes : 1; // Hardware-accelerated Advanced Encryption Standard.
52  int pmull : 1; // Polynomial multiply long.
53  int sha1 : 1; // Hardware-accelerated SHA1.
54  int sha2 : 1; // Hardware-accelerated SHA2-256.
55  int crc32 : 1; // Hardware-accelerated CRC-32.
56 
57  // Make sure to update ArmFeaturesEnum below if you add a field here.
58 } ArmFeatures;
59 
60 typedef struct {
64  int variant;
65  int part;
66  int revision;
67 } ArmInfo;
68 
69 // TODO(user): Add macros to know which features are present at compile
70 // time.
71 
72 ArmInfo GetArmInfo(void);
73 
74 // Compute CpuId from ArmInfo.
75 uint32_t GetArmCpuId(const ArmInfo* const info);
76 
78 // Introspection functions
79 
80 typedef enum {
110 
111 int GetArmFeaturesEnumValue(const ArmFeatures* features, ArmFeaturesEnum value);
112 
114 
116 
117 #if !defined(CPU_FEATURES_ARCH_ARM)
118 #error "Including cpuinfo_arm.h from a non-arm target."
119 #endif
120 
121 #endif // CPU_FEATURES_INCLUDE_CPUINFO_ARM_H_
#define CPU_FEATURES_START_CPP_NAMESPACE
Definition: cpu_features_macros.h:114
#define CPU_FEATURES_END_CPP_NAMESPACE
Definition: cpu_features_macros.h:115
ArmFeaturesEnum
Definition: cpuinfo_arm.h:80
@ ARM_VFPV3
Definition: cpuinfo_arm.h:94
@ ARM_SWP
Definition: cpuinfo_arm.h:81
@ ARM_VFPV3D16
Definition: cpuinfo_arm.h:95
@ ARM_LAST_
Definition: cpuinfo_arm.h:108
@ ARM_SHA2
Definition: cpuinfo_arm.h:106
@ ARM_IWMMXT
Definition: cpuinfo_arm.h:90
@ ARM_EVTSTRM
Definition: cpuinfo_arm.h:102
@ ARM_LPAE
Definition: cpuinfo_arm.h:101
@ ARM_FASTMULT
Definition: cpuinfo_arm.h:85
@ ARM_EDSP
Definition: cpuinfo_arm.h:88
@ ARM_FPA
Definition: cpuinfo_arm.h:86
@ ARM_VFPD32
Definition: cpuinfo_arm.h:100
@ ARM_PMULL
Definition: cpuinfo_arm.h:104
@ ARM_JAVA
Definition: cpuinfo_arm.h:89
@ ARM_SHA1
Definition: cpuinfo_arm.h:105
@ ARM_VFPV4
Definition: cpuinfo_arm.h:97
@ ARM_THUMBEE
Definition: cpuinfo_arm.h:92
@ ARM_IDIVA
Definition: cpuinfo_arm.h:98
@ ARM_CRUNCH
Definition: cpuinfo_arm.h:91
@ ARM_THUMB
Definition: cpuinfo_arm.h:83
@ ARM_HALF
Definition: cpuinfo_arm.h:82
@ ARM_IDIVT
Definition: cpuinfo_arm.h:99
@ ARM_26BIT
Definition: cpuinfo_arm.h:84
@ ARM_NEON
Definition: cpuinfo_arm.h:93
@ ARM_TLS
Definition: cpuinfo_arm.h:96
@ ARM_AES
Definition: cpuinfo_arm.h:103
@ ARM_VFP
Definition: cpuinfo_arm.h:87
@ ARM_CRC32
Definition: cpuinfo_arm.h:107
int GetArmFeaturesEnumValue(const ArmFeatures *features, ArmFeaturesEnum value)
Definition: cpuinfo_arm.c:203
ArmInfo GetArmInfo(void)
Definition: cpuinfo_arm.c:180
uint32_t GetArmCpuId(const ArmInfo *const info)
Definition: cpuinfo_arm.c:112
const char * GetArmFeaturesEnumName(ArmFeaturesEnum)
Definition: cpuinfo_arm.c:209
Definition: cpuinfo_arm.h:25
int crunch
Definition: cpuinfo_arm.h:38
int sha1
Definition: cpuinfo_arm.h:53
int thumb
Definition: cpuinfo_arm.h:28
int evtstrm
Definition: cpuinfo_arm.h:50
int vfpv3d16
Definition: cpuinfo_arm.h:42
int idiva
Definition: cpuinfo_arm.h:45
int fastmult
Definition: cpuinfo_arm.h:31
int java
Definition: cpuinfo_arm.h:36
int vfpv4
Definition: cpuinfo_arm.h:44
int sha2
Definition: cpuinfo_arm.h:54
int edsp
Definition: cpuinfo_arm.h:34
int aes
Definition: cpuinfo_arm.h:51
int crc32
Definition: cpuinfo_arm.h:55
int vfpv3
Definition: cpuinfo_arm.h:41
int idivt
Definition: cpuinfo_arm.h:46
int _26bit
Definition: cpuinfo_arm.h:29
int half
Definition: cpuinfo_arm.h:27
int thumbee
Definition: cpuinfo_arm.h:39
int vfp
Definition: cpuinfo_arm.h:33
int fpa
Definition: cpuinfo_arm.h:32
int vfpd32
Definition: cpuinfo_arm.h:47
int pmull
Definition: cpuinfo_arm.h:52
int iwmmxt
Definition: cpuinfo_arm.h:37
int lpae
Definition: cpuinfo_arm.h:48
int swp
Definition: cpuinfo_arm.h:26
int neon
Definition: cpuinfo_arm.h:40
int tls
Definition: cpuinfo_arm.h:43
Definition: cpuinfo_arm.h:60
int part
Definition: cpuinfo_arm.h:65
int architecture
Definition: cpuinfo_arm.h:63
int variant
Definition: cpuinfo_arm.h:64
int implementer
Definition: cpuinfo_arm.h:62
int revision
Definition: cpuinfo_arm.h:66
ArmFeatures features
Definition: cpuinfo_arm.h:61