1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
56 *
57 * This product includes cryptographic software written by Eric Young
58 * (eay@cryptsoft.com). This product includes software written by Tim
59 * Hudson (tjh@cryptsoft.com). */
60
61 #ifndef OPENSSL_HEADER_CPU_H
62 #define OPENSSL_HEADER_CPU_H
63
64 #include <GFp/base.h>
65
66 // Runtime CPU feature support
67
68
69 #if defined(OPENSSL_X86) || defined(OPENSSL_X86_64)
70 // GFp_ia32cap_P contains the Intel CPUID bits when running on an x86 or
71 // x86-64 system.
72 //
73 // Index 0:
74 // EDX for CPUID where EAX = 1
75 // Bit 20 is always zero
76 // Bit 28 is adjusted to reflect whether the data cache is shared between
77 // multiple logical cores
78 // Bit 30 is used to indicate an Intel CPU
79 // Index 1:
80 // ECX for CPUID where EAX = 1
81 // Bit 11 is used to indicate AMD XOP support, not SDBG
82 // Index 2:
83 // EBX for CPUID where EAX = 7
84 // Index 3:
85 // ECX for CPUID where EAX = 7
86 //
87 // Note: the CPUID bits are pre-adjusted for the OSXSAVE bit and the YMM and XMM
88 // bits in XCR0, so it is not necessary to check those.
89 extern uint32_t GFp_ia32cap_P[4];
90 #endif
91
92 #if defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)
93
94 #if defined(OPENSSL_APPLE)
95 // iOS builds use the static ARM configuration.
96 #define OPENSSL_STATIC_ARMCAP
97 #endif
98
99 #if !defined(OPENSSL_STATIC_ARMCAP)
100
101 // GFp_is_NEON_capable_at_runtime returns true if the current CPU has a NEON
102 // unit. Note that |OPENSSL_armcap_P| also exists and contains the same
103 // information in a form that's easier for assembly to use.
104 OPENSSL_EXPORT uint8_t GFp_is_NEON_capable_at_runtime(void);
105
106 // GFp_is_NEON_capable returns true if the current CPU has a NEON unit. If
107 // this is known statically then it returns one immediately.
GFp_is_NEON_capable(void)108 static inline int GFp_is_NEON_capable(void) {
109 // On 32-bit ARM, one CPU is known to have a broken NEON unit which is known
110 // to fail with on some hand-written NEON assembly. Assume that non-Android
111 // applications will not use that buggy CPU but still support Android users
112 // that do, even when the compiler is instructed to freely emit NEON code.
113 // See https://crbug.com/341598 and https://crbug.com/606629.
114 #if (defined(__ARM_NEON__) || defined(__ARM_NEON)) \
115 && (!defined(OPENSSL_ARM) || !defined(__ANDROID__))
116 return 1;
117 #else
118 return GFp_is_NEON_capable_at_runtime();
119 #endif
120 }
121
122 // GFp_is_ARMv8_AES_capable returns true if the current CPU supports the
123 // ARMv8 AES instruction.
124 int GFp_is_ARMv8_AES_capable(void);
125
126 #else
127
GFp_is_NEON_capable(void)128 static inline int GFp_is_NEON_capable(void) {
129 #if defined(OPENSSL_STATIC_ARMCAP_NEON) || \
130 (defined(__ARM_NEON__) || defined(__ARM_NEON))
131 return 1;
132 #else
133 return 0;
134 #endif
135 }
136
GFp_is_ARMv8_AES_capable(void)137 static inline int GFp_is_ARMv8_AES_capable(void) {
138 #if defined(OPENSSL_STATIC_ARMCAP_AES) || defined(__ARM_FEATURE_CRYPTO)
139 return 1;
140 #else
141 return 0;
142 #endif
143 }
144
145 #endif // OPENSSL_STATIC_ARMCAP
146 #endif // OPENSSL_ARM || OPENSSL_AARCH64
147
148 #if defined(OPENSSL_PPC64LE)
149
150 // GFp_is_PPC64LE_vcrypto_capable returns true iff the current CPU supports
151 // the Vector.AES category of instructions.
152 int GFp_is_PPC64LE_vcrypto_capable(void);
153
154 #endif // OPENSSL_PPC64LE
155
156 #endif // OPENSSL_HEADER_CPU_H
157