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Diffstat (limited to 'libs/libsodium/src/sodium/runtime.c')
-rw-r--r--libs/libsodium/src/sodium/runtime.c286
1 files changed, 286 insertions, 0 deletions
diff --git a/libs/libsodium/src/sodium/runtime.c b/libs/libsodium/src/sodium/runtime.c
new file mode 100644
index 0000000000..ba1000f4dc
--- /dev/null
+++ b/libs/libsodium/src/sodium/runtime.c
@@ -0,0 +1,286 @@
+#include <stddef.h>
+#include <stdint.h>
+#ifdef HAVE_ANDROID_GETCPUFEATURES
+# include <cpu-features.h>
+#endif
+
+#include "private/common.h"
+#include "runtime.h"
+
+typedef struct CPUFeatures_ {
+ int initialized;
+ int has_neon;
+ int has_sse2;
+ int has_sse3;
+ int has_ssse3;
+ int has_sse41;
+ int has_avx;
+ int has_avx2;
+ int has_avx512f;
+ int has_pclmul;
+ int has_aesni;
+ int has_rdrand;
+} CPUFeatures;
+
+static CPUFeatures _cpu_features;
+
+#define CPUID_EBX_AVX2 0x00000020
+#define CPUID_EBX_AVX512F 0x00010000
+
+#define CPUID_ECX_SSE3 0x00000001
+#define CPUID_ECX_PCLMUL 0x00000002
+#define CPUID_ECX_SSSE3 0x00000200
+#define CPUID_ECX_SSE41 0x00080000
+#define CPUID_ECX_AESNI 0x02000000
+#define CPUID_ECX_XSAVE 0x04000000
+#define CPUID_ECX_OSXSAVE 0x08000000
+#define CPUID_ECX_AVX 0x10000000
+#define CPUID_ECX_RDRAND 0x40000000
+
+#define CPUID_EDX_SSE2 0x04000000
+
+#define XCR0_SSE 0x00000002
+#define XCR0_AVX 0x00000004
+
+static int
+_sodium_runtime_arm_cpu_features(CPUFeatures * const cpu_features)
+{
+#ifndef __arm__
+ cpu_features->has_neon = 0;
+ return -1;
+#else
+# ifdef __APPLE__
+# ifdef __ARM_NEON__
+ cpu_features->has_neon = 1;
+# else
+ cpu_features->has_neon = 0;
+# endif
+# elif defined(HAVE_ANDROID_GETCPUFEATURES) && \
+ defined(ANDROID_CPU_ARM_FEATURE_NEON)
+ cpu_features->has_neon =
+ (android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0x0;
+# else
+ cpu_features->has_neon = 0;
+# endif
+ return 0;
+#endif
+}
+
+static void
+_cpuid(unsigned int cpu_info[4U], const unsigned int cpu_info_type)
+{
+#if defined(_MSC_VER) && \
+ (defined(_M_X64) || defined(_M_AMD64) || defined(_M_IX86))
+ __cpuid((int *) cpu_info, cpu_info_type);
+#elif defined(HAVE_CPUID)
+ cpu_info[0] = cpu_info[1] = cpu_info[2] = cpu_info[3] = 0;
+# ifdef __i386__
+ __asm__ __volatile__(
+ "pushfl; pushfl; "
+ "popl %0; "
+ "movl %0, %1; xorl %2, %0; "
+ "pushl %0; "
+ "popfl; pushfl; popl %0; popfl"
+ : "=&r"(cpu_info[0]), "=&r"(cpu_info[1])
+ : "i"(0x200000));
+ if (((cpu_info[0] ^ cpu_info[1]) & 0x200000) == 0x0) {
+ return; /* LCOV_EXCL_LINE */
+ }
+# endif
+# ifdef __i386__
+ __asm__ __volatile__("xchgl %%ebx, %k1; cpuid; xchgl %%ebx, %k1"
+ : "=a"(cpu_info[0]), "=&r"(cpu_info[1]),
+ "=c"(cpu_info[2]), "=d"(cpu_info[3])
+ : "0"(cpu_info_type), "2"(0U));
+# elif defined(__x86_64__)
+ __asm__ __volatile__("xchgq %%rbx, %q1; cpuid; xchgq %%rbx, %q1"
+ : "=a"(cpu_info[0]), "=&r"(cpu_info[1]),
+ "=c"(cpu_info[2]), "=d"(cpu_info[3])
+ : "0"(cpu_info_type), "2"(0U));
+# else
+ __asm__ __volatile__("cpuid"
+ : "=a"(cpu_info[0]), "=b"(cpu_info[1]),
+ "=c"(cpu_info[2]), "=d"(cpu_info[3])
+ : "0"(cpu_info_type), "2"(0U));
+# endif
+#else
+ (void) cpu_info_type;
+ cpu_info[0] = cpu_info[1] = cpu_info[2] = cpu_info[3] = 0;
+#endif
+}
+
+static int
+_sodium_runtime_intel_cpu_features(CPUFeatures * const cpu_features)
+{
+ unsigned int cpu_info[4];
+ unsigned int id;
+
+ _cpuid(cpu_info, 0x0);
+ if ((id = cpu_info[0]) == 0U) {
+ return -1; /* LCOV_EXCL_LINE */
+ }
+ _cpuid(cpu_info, 0x00000001);
+#ifdef HAVE_EMMINTRIN_H
+ cpu_features->has_sse2 = ((cpu_info[3] & CPUID_EDX_SSE2) != 0x0);
+#else
+ cpu_features->has_sse2 = 0;
+#endif
+
+#ifdef HAVE_PMMINTRIN_H
+ cpu_features->has_sse3 = ((cpu_info[2] & CPUID_ECX_SSE3) != 0x0);
+#else
+ cpu_features->has_sse3 = 0;
+#endif
+
+#ifdef HAVE_TMMINTRIN_H
+ cpu_features->has_ssse3 = ((cpu_info[2] & CPUID_ECX_SSSE3) != 0x0);
+#else
+ cpu_features->has_ssse3 = 0;
+#endif
+
+#ifdef HAVE_SMMINTRIN_H
+ cpu_features->has_sse41 = ((cpu_info[2] & CPUID_ECX_SSE41) != 0x0);
+#else
+ cpu_features->has_sse41 = 0;
+#endif
+
+ cpu_features->has_avx = 0;
+#ifdef HAVE_AVXINTRIN_H
+ if ((cpu_info[2] & (CPUID_ECX_AVX | CPUID_ECX_XSAVE | CPUID_ECX_OSXSAVE)) ==
+ (CPUID_ECX_AVX | CPUID_ECX_XSAVE | CPUID_ECX_OSXSAVE)) {
+ uint32_t xcr0 = 0U;
+# if defined(HAVE__XGETBV) || \
+ (defined(_MSC_VER) && defined(_XCR_XFEATURE_ENABLED_MASK) && _MSC_FULL_VER >= 160040219)
+ xcr0 = (uint32_t) _xgetbv(0);
+# elif defined(_MSC_VER) && defined(_M_IX86)
+ __asm {
+ xor ecx, ecx
+ _asm _emit 0x0f _asm _emit 0x01 _asm _emit 0xd0
+ mov xcr0, eax
+ }
+# elif defined(HAVE_AVX_ASM)
+ __asm__ __volatile__(".byte 0x0f, 0x01, 0xd0" /* XGETBV */
+ : "=a"(xcr0)
+ : "c"((uint32_t) 0U)
+ : "%edx");
+# endif
+ if ((xcr0 & (XCR0_SSE | XCR0_AVX)) == (XCR0_SSE | XCR0_AVX)) {
+ cpu_features->has_avx = 1;
+ }
+ }
+#endif
+
+ cpu_features->has_avx2 = 0;
+#ifdef HAVE_AVX2INTRIN_H
+ if (cpu_features->has_avx) {
+ unsigned int cpu_info7[4];
+
+ _cpuid(cpu_info7, 0x00000007);
+ cpu_features->has_avx2 = ((cpu_info7[1] & CPUID_EBX_AVX2) != 0x0);
+ }
+#endif
+
+ cpu_features->has_avx512f = 0;
+#ifdef HAVE_AVX512FINTRIN_H
+ if (cpu_features->has_avx2) {
+ unsigned int cpu_info7[4];
+
+ _cpuid(cpu_info7, 0x00000007);
+ cpu_features->has_avx512f = ((cpu_info7[1] & CPUID_EBX_AVX512F) != 0x0);
+ }
+#endif
+
+#ifdef HAVE_WMMINTRIN_H
+ cpu_features->has_pclmul = ((cpu_info[2] & CPUID_ECX_PCLMUL) != 0x0);
+ cpu_features->has_aesni = ((cpu_info[2] & CPUID_ECX_AESNI) != 0x0);
+#else
+ cpu_features->has_pclmul = 0;
+ cpu_features->has_aesni = 0;
+#endif
+
+#ifdef HAVE_RDRAND
+ cpu_features->has_rdrand = ((cpu_info[2] & CPUID_ECX_RDRAND) != 0x0);
+#else
+ cpu_features->has_rdrand = 0;
+#endif
+
+ return 0;
+}
+
+int
+_sodium_runtime_get_cpu_features(void)
+{
+ int ret = -1;
+
+ ret &= _sodium_runtime_arm_cpu_features(&_cpu_features);
+ ret &= _sodium_runtime_intel_cpu_features(&_cpu_features);
+ _cpu_features.initialized = 1;
+
+ return ret;
+}
+
+int
+sodium_runtime_has_neon(void)
+{
+ return _cpu_features.has_neon;
+}
+
+int
+sodium_runtime_has_sse2(void)
+{
+ return _cpu_features.has_sse2;
+}
+
+int
+sodium_runtime_has_sse3(void)
+{
+ return _cpu_features.has_sse3;
+}
+
+int
+sodium_runtime_has_ssse3(void)
+{
+ return _cpu_features.has_ssse3;
+}
+
+int
+sodium_runtime_has_sse41(void)
+{
+ return _cpu_features.has_sse41;
+}
+
+int
+sodium_runtime_has_avx(void)
+{
+ return _cpu_features.has_avx;
+}
+
+int
+sodium_runtime_has_avx2(void)
+{
+ return _cpu_features.has_avx2;
+}
+
+int
+sodium_runtime_has_avx512f(void)
+{
+ return _cpu_features.has_avx512f;
+}
+
+int
+sodium_runtime_has_pclmul(void)
+{
+ return _cpu_features.has_pclmul;
+}
+
+int
+sodium_runtime_has_aesni(void)
+{
+ return _cpu_features.has_aesni;
+}
+
+int
+sodium_runtime_has_rdrand(void)
+{
+ return _cpu_features.has_rdrand;
+}