13597425450

Committed 28 Feb 2025 10:16PM UTC coverage: 91.687% (-0.006%) from 91.693%

Build # 13597425450

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github

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web-flow

Commit Message

Merge pull request #4728 from randombit/jack/use-std-endian

Use std::endian more, remove endian checks in `CPUID`

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95.4

/src/lib/utils/cpuid/cpuid.cpp

/*
* Runtime CPU detection
* (C) 2009,2010,2013,2017,2023 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/

#include <botan/internal/cpuid.h>

#include <botan/assert.h>
#include <botan/exceptn.h>
#include <botan/types.h>
#include <botan/internal/parsing.h>
#include <botan/internal/target_info.h>
#include <ostream>

#if defined(BOTAN_HAS_OS_UTILS)
   #include <botan/internal/os_utils.h>
#endif

namespace Botan {

//static
std::string CPUID::to_string() {
   std::vector<std::string> flags;

   auto append_fn = [&](bool flag, const char* flag_name) {
      if(flag) {
         flags.push_back(flag_name);
      }
   };

   // NOLINTNEXTLINE(*-macro-usage)
#define CPUID_PRINT(flag) append_fn(has_##flag(), #flag)

#if defined(BOTAN_TARGET_CPU_IS_X86_FAMILY)
   CPUID_PRINT(rdtsc);

   CPUID_PRINT(sse2);
   CPUID_PRINT(ssse3);
   CPUID_PRINT(avx2);

   CPUID_PRINT(bmi2);
   CPUID_PRINT(adx);
   CPUID_PRINT(gfni);

   CPUID_PRINT(aes_ni);
   CPUID_PRINT(clmul);
   CPUID_PRINT(rdrand);
   CPUID_PRINT(rdseed);
   CPUID_PRINT(intel_sha);
   CPUID_PRINT(intel_sha512);

   CPUID_PRINT(avx2_vaes);
   CPUID_PRINT(avx2_clmul);

   CPUID_PRINT(avx512);
   CPUID_PRINT(avx512_aes);
   CPUID_PRINT(avx512_clmul);

   CPUID_PRINT(intel_sm3);
   CPUID_PRINT(intel_sm4);

#elif defined(BOTAN_TARGET_CPU_IS_PPC_FAMILY)
   CPUID_PRINT(altivec);
   CPUID_PRINT(power_crypto);
   CPUID_PRINT(darn_rng);
#elif defined(BOTAN_TARGET_CPU_IS_ARM_FAMILY)
   CPUID_PRINT(neon);
   CPUID_PRINT(arm_sve);

   CPUID_PRINT(arm_sha1);
   CPUID_PRINT(arm_sha2);
   CPUID_PRINT(arm_aes);
   CPUID_PRINT(arm_pmull);
   CPUID_PRINT(arm_sha2_512);
   CPUID_PRINT(arm_sha3);
   CPUID_PRINT(arm_sm3);
   CPUID_PRINT(arm_sm4);
#else
   BOTAN_UNUSED(append_fn);
#endif

#undef CPUID_PRINT

   return string_join(flags, ' ');
}

//static
void CPUID::initialize() {
   state() = CPUID_Data();
}

namespace {

#if defined(BOTAN_CPUID_HAS_DETECTION)
uint32_t cleared_cpuid_bits() {
   uint32_t cleared = 0;

   #if defined(BOTAN_HAS_OS_UTILS)
   std::string clear_cpuid_env;
   if(OS::read_env_variable(clear_cpuid_env, "BOTAN_CLEAR_CPUID")) {
      for(const auto& cpuid : split_on(clear_cpuid_env, ',')) {
         for(auto& bit : CPUID::bit_from_string(cpuid)) {
            cleared |= bit;
         }
      }
   }
   #endif

   return cleared;
}
#endif

}  // namespace

CPUID::CPUID_Data::CPUID_Data() {
   m_processor_features = 0;

#if defined(BOTAN_CPUID_HAS_DETECTION)
   m_processor_features = detect_cpu_features(~cleared_cpuid_bits());
#endif

   m_processor_features |= CPUID::CPUID_INITIALIZED_BIT;
}

std::vector<CPUID::CPUID_bits> CPUID::bit_from_string(std::string_view tok) {
#if defined(BOTAN_TARGET_CPU_IS_X86_FAMILY)
   if(tok == "sse2" || tok == "simd") {
      return {CPUID::CPUID_SSE2_BIT};
   } else if(tok == "ssse3") {
      return {CPUID::CPUID_SSSE3_BIT};
   } else if(tok == "aesni" || tok == "aes_ni") {
      // aes_ni is the string printed on the console when running "botan cpuid"
      return {CPUID::CPUID_AESNI_BIT};
   } else if(tok == "clmul") {
      return {CPUID::CPUID_CLMUL_BIT};
   } else if(tok == "avx2") {
      return {CPUID::CPUID_AVX2_BIT};
   } else if(tok == "avx512") {
      return {CPUID::CPUID_AVX512_BIT};
   }
   // there were two if statements testing "sha" and "intel_sha" separately; combined
   else if(tok == "sha" || tok == "intel_sha") {
      return {CPUID::CPUID_SHA_BIT};
   } else if(tok == "rdtsc") {
      return {CPUID::CPUID_RDTSC_BIT};
   } else if(tok == "bmi2") {
      return {CPUID::CPUID_BMI_BIT};
   } else if(tok == "adx") {
      return {CPUID::CPUID_ADX_BIT};
   } else if(tok == "gfni") {
      return {CPUID::CPUID_GFNI_BIT};
   } else if(tok == "rdrand") {
      return {CPUID::CPUID_RDRAND_BIT};
   } else if(tok == "rdseed") {
      return {CPUID::CPUID_RDSEED_BIT};
   } else if(tok == "avx512_aes") {
      return {CPUID::CPUID_AVX512_AES_BIT};
   } else if(tok == "avx512_clmul") {
      return {CPUID::CPUID_AVX512_CLMUL_BIT};
   } else if(tok == "avx2_vaes") {
      return {CPUID::CPUID_AVX2_AES_BIT};
   } else if(tok == "avx2_clmul") {
      return {CPUID::CPUID_AVX2_CLMUL_BIT};
   } else if(tok == "intel_sm3") {
      return {CPUID::CPUID_SM3_BIT};
   } else if(tok == "intel_sm4") {
      return {CPUID::CPUID_SM4_BIT};
   }

#elif defined(BOTAN_TARGET_CPU_IS_PPC_FAMILY)
   if(tok == "altivec" || tok == "simd") {
      return {CPUID::CPUID_ALTIVEC_BIT};
   } else if(tok == "power_crypto") {
      return {CPUID::CPUID_POWER_CRYPTO_BIT};
   } else if(tok == "darn_rng") {
      return {CPUID::CPUID_DARN_BIT};
   }

#elif defined(BOTAN_TARGET_CPU_IS_ARM_FAMILY)
   if(tok == "neon" || tok == "simd") {
      return {CPUID::CPUID_ARM_NEON_BIT};
   } else if(tok == "arm_sve") {
      return {CPUID::CPUID_ARM_SVE_BIT};
   } else if(tok == "armv8sha1" || tok == "arm_sha1") {
      return {CPUID::CPUID_ARM_SHA1_BIT};
   } else if(tok == "armv8sha2" || tok == "arm_sha2") {
      return {CPUID::CPUID_ARM_SHA2_BIT};
   } else if(tok == "armv8aes" || tok == "arm_aes") {
      return {CPUID::CPUID_ARM_AES_BIT};
   } else if(tok == "armv8pmull" || tok == "arm_pmull") {
      return {CPUID::CPUID_ARM_PMULL_BIT};
   } else if(tok == "armv8sha3" || tok == "arm_sha3") {
      return {CPUID::CPUID_ARM_SHA3_BIT};
   } else if(tok == "armv8sha2_512" || tok == "arm_sha2_512") {
      return {CPUID::CPUID_ARM_SHA2_512_BIT};
   } else if(tok == "armv8sm3" || tok == "arm_sm3") {
      return {CPUID::CPUID_ARM_SM3_BIT};
   } else if(tok == "armv8sm4" || tok == "arm_sm4") {
      return {CPUID::CPUID_ARM_SM4_BIT};
   }

#else
   BOTAN_UNUSED(tok);
#endif

   return {};
}

}  // namespace Botan

1	/*
2	* Runtime CPU detection
3	* (C) 2009,2010,2013,2017,2023 Jack Lloyd
4	*
5	* Botan is released under the Simplified BSD License (see license.txt)
6	*/
7
8	#include <botan/internal/cpuid.h>
9
10	#include <botan/assert.h>
11	#include <botan/exceptn.h>
12	#include <botan/types.h>
13	#include <botan/internal/parsing.h>
14	#include <botan/internal/target_info.h>
15	#include <ostream>
16
17	#if defined(BOTAN_HAS_OS_UTILS)
18	#include <botan/internal/os_utils.h>
19	#endif
20
21	namespace Botan {
22
23	//static
24	std::string CPUID::to_string() {	19✔
25	std::vector<std::string> flags;	19✔
26
27	auto append_fn = [&](bool flag, const char* flag_name) {	399✔
28	if(flag) {	380✔
29	flags.push_back(flag_name);	442✔
30	}
31	};	380✔
32
33	// NOLINTNEXTLINE(*-macro-usage)
34	#define CPUID_PRINT(flag) append_fn(has_##flag(), #flag)
35
36	#if defined(BOTAN_TARGET_CPU_IS_X86_FAMILY)
37	CPUID_PRINT(rdtsc);	19✔
38
39	CPUID_PRINT(sse2);	19✔
40	CPUID_PRINT(ssse3);	19✔
41	CPUID_PRINT(avx2);	19✔
42
43	CPUID_PRINT(bmi2);	19✔
44	CPUID_PRINT(adx);	19✔
45	CPUID_PRINT(gfni);	19✔
46
47	CPUID_PRINT(aes_ni);	19✔
48	CPUID_PRINT(clmul);	19✔
49	CPUID_PRINT(rdrand);	19✔
50	CPUID_PRINT(rdseed);	19✔
51	CPUID_PRINT(intel_sha);	19✔
52	CPUID_PRINT(intel_sha512);	19✔
53
54	CPUID_PRINT(avx2_vaes);	19✔
55	CPUID_PRINT(avx2_clmul);	19✔
56
57	CPUID_PRINT(avx512);	19✔
58	CPUID_PRINT(avx512_aes);	19✔
59	CPUID_PRINT(avx512_clmul);	19✔
60
61	CPUID_PRINT(intel_sm3);	19✔
62	CPUID_PRINT(intel_sm4);	19✔
63
64	#elif defined(BOTAN_TARGET_CPU_IS_PPC_FAMILY)
65	CPUID_PRINT(altivec);
66	CPUID_PRINT(power_crypto);
67	CPUID_PRINT(darn_rng);
68	#elif defined(BOTAN_TARGET_CPU_IS_ARM_FAMILY)
69	CPUID_PRINT(neon);
70	CPUID_PRINT(arm_sve);
71
72	CPUID_PRINT(arm_sha1);
73	CPUID_PRINT(arm_sha2);
74	CPUID_PRINT(arm_aes);
75	CPUID_PRINT(arm_pmull);
76	CPUID_PRINT(arm_sha2_512);
77	CPUID_PRINT(arm_sha3);
78	CPUID_PRINT(arm_sm3);
79	CPUID_PRINT(arm_sm4);
80	#else
81	BOTAN_UNUSED(append_fn);
82	#endif
83
84	#undef CPUID_PRINT
85
86	return string_join(flags, ' ');	38✔
87	}	19✔
88
89	//static
90	void CPUID::initialize() {	5,629✔
91	state() = CPUID_Data();	5,629✔
92	}	5,629✔
93
94	namespace {
95
96	#if defined(BOTAN_CPUID_HAS_DETECTION)
97	uint32_t cleared_cpuid_bits() {	13,016✔
98	uint32_t cleared = 0;	13,016✔
99
100	#if defined(BOTAN_HAS_OS_UTILS)
101	std::string clear_cpuid_env;	13,016✔
102	if(OS::read_env_variable(clear_cpuid_env, "BOTAN_CLEAR_CPUID")) {	13,016✔
103	for(const auto& cpuid : split_on(clear_cpuid_env, ',')) {	336✔
104	for(auto& bit : CPUID::bit_from_string(cpuid)) {	336✔
105	cleared \|= bit;	168✔
106	}	168✔
107	}	168✔
108	}
109	#endif
110
111	return cleared;	13,016✔
112	}	13,016✔
113	#endif
114
115	} // namespace
116
117	CPUID::CPUID_Data::CPUID_Data() {	13,016✔
118	m_processor_features = 0;	13,016✔
119
120	#if defined(BOTAN_CPUID_HAS_DETECTION)
121	m_processor_features = detect_cpu_features(~cleared_cpuid_bits());	13,016✔
122	#endif
123
124	m_processor_features \|= CPUID::CPUID_INITIALIZED_BIT;	13,016✔
125	}	13,016✔
126
127	std::vector<CPUID::CPUID_bits> CPUID::bit_from_string(std::string_view tok) {	211✔
128	#if defined(BOTAN_TARGET_CPU_IS_X86_FAMILY)
129	if(tok == "sse2" \|\| tok == "simd") {	232✔
130	return {CPUID::CPUID_SSE2_BIT};	7✔
131	} else if(tok == "ssse3") {	204✔
132	return {CPUID::CPUID_SSSE3_BIT};	6✔
133	} else if(tok == "aesni" \|\| tok == "aes_ni") {	208✔
134	// aes_ni is the string printed on the console when running "botan cpuid"
135	return {CPUID::CPUID_AESNI_BIT};	4✔
136	} else if(tok == "clmul") {	194✔
137	return {CPUID::CPUID_CLMUL_BIT};	3✔
138	} else if(tok == "avx2") {	191✔
139	return {CPUID::CPUID_AVX2_BIT};	6✔
140	} else if(tok == "avx512") {	370✔
141	return {CPUID::CPUID_AVX512_BIT};	2✔
142	}
143	// there were two if statements testing "sha" and "intel_sha" separately; combined
144	else if(tok == "sha" \|\| tok == "intel_sha") {	188✔
145	return {CPUID::CPUID_SHA_BIT};	4✔
146	} else if(tok == "rdtsc") {	179✔
147	return {CPUID::CPUID_RDTSC_BIT};	1✔
148	} else if(tok == "bmi2") {	178✔
149	return {CPUID::CPUID_BMI_BIT};	4✔
150	} else if(tok == "adx") {	174✔
151	return {CPUID::CPUID_ADX_BIT};	1✔
152	} else if(tok == "gfni") {	173✔
153	return {CPUID::CPUID_GFNI_BIT};	1✔
154	} else if(tok == "rdrand") {	172✔
155	return {CPUID::CPUID_RDRAND_BIT};	1✔
156	} else if(tok == "rdseed") {	171✔
157	return {CPUID::CPUID_RDSEED_BIT};	1✔
158	} else if(tok == "avx512_aes") {	170✔
159	return {CPUID::CPUID_AVX512_AES_BIT};	×
160	} else if(tok == "avx512_clmul") {	170✔
161	return {CPUID::CPUID_AVX512_CLMUL_BIT};	×
162	} else if(tok == "avx2_vaes") {	170✔
163	return {CPUID::CPUID_AVX2_AES_BIT};	4✔
164	} else if(tok == "avx2_clmul") {	168✔
165	return {CPUID::CPUID_AVX2_CLMUL_BIT};	156✔
166	} else if(tok == "intel_sm3") {	12✔
167	return {CPUID::CPUID_SM3_BIT};	×
168	} else if(tok == "intel_sm4") {	12✔
169	return {CPUID::CPUID_SM4_BIT};	×
170	}
171
172	#elif defined(BOTAN_TARGET_CPU_IS_PPC_FAMILY)
173	if(tok == "altivec" \|\| tok == "simd") {
174	return {CPUID::CPUID_ALTIVEC_BIT};
175	} else if(tok == "power_crypto") {
176	return {CPUID::CPUID_POWER_CRYPTO_BIT};
177	} else if(tok == "darn_rng") {
178	return {CPUID::CPUID_DARN_BIT};
179	}
180
181	#elif defined(BOTAN_TARGET_CPU_IS_ARM_FAMILY)
182	if(tok == "neon" \|\| tok == "simd") {
183	return {CPUID::CPUID_ARM_NEON_BIT};
184	} else if(tok == "arm_sve") {
185	return {CPUID::CPUID_ARM_SVE_BIT};
186	} else if(tok == "armv8sha1" \|\| tok == "arm_sha1") {
187	return {CPUID::CPUID_ARM_SHA1_BIT};
188	} else if(tok == "armv8sha2" \|\| tok == "arm_sha2") {
189	return {CPUID::CPUID_ARM_SHA2_BIT};
190	} else if(tok == "armv8aes" \|\| tok == "arm_aes") {
191	return {CPUID::CPUID_ARM_AES_BIT};
192	} else if(tok == "armv8pmull" \|\| tok == "arm_pmull") {
193	return {CPUID::CPUID_ARM_PMULL_BIT};
194	} else if(tok == "armv8sha3" \|\| tok == "arm_sha3") {
195	return {CPUID::CPUID_ARM_SHA3_BIT};
196	} else if(tok == "armv8sha2_512" \|\| tok == "arm_sha2_512") {
197	return {CPUID::CPUID_ARM_SHA2_512_BIT};
198	} else if(tok == "armv8sm3" \|\| tok == "arm_sm3") {
199	return {CPUID::CPUID_ARM_SM3_BIT};
200	} else if(tok == "armv8sm4" \|\| tok == "arm_sm4") {
201	return {CPUID::CPUID_ARM_SM4_BIT};
202	}
203
204	#else
205	BOTAN_UNUSED(tok);
206	#endif
207
208	return {};	12✔
209	}
210
211	} // namespace Botan

randombit / botan / 13597425450

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