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Use AES hardware support on Apple arm64 and with GCC on aarch64 #262

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Use AES hardware support on Apple arm64 and with GCC on aarch64 #262

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23 changes: 23 additions & 0 deletions src/aes_hardware.c
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Original file line number Diff line number Diff line change
Expand Up @@ -41,6 +41,13 @@

#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)) && (defined(__x86_64__) || defined(__i386))
#define HAS_AES_HARDWARE AES_HARDWARE_NI

#elif (__GNUC__ >= 6) && defined(__aarch64__)
#define HAS_AES_HARDWARE AES_HARDWARE_NEON

/* Crypto extension in AArch64 can be enabled using __attribute__((target)) */
#define USE_GCC_ATTR_TARGET_AARCH64

#endif


Expand Down Expand Up @@ -461,6 +468,10 @@ aesDecryptCBC(const unsigned char* in,
#define FUNC_ISA __attribute__ ((target("neon,crypto")))
#endif /* USE_CLANG_ATTR_TARGET_AARCH64 */

#ifdef USE_GCC_ATTR_TARGET_AARCH64
#define FUNC_ISA __attribute__ ((target("+crypto")))
#endif /* USE_GCC_ATTR_TARGET_AARCH64 */

/* FUNCtion attributes for ISA (Instruction Set Architecture) */
#ifndef FUNC_ISA
#define FUNC_ISA
Expand Down Expand Up @@ -497,6 +508,18 @@ aesHardwareAvailableOnPlatform()
return (int) IsProcessorFeaturePresent(PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE);
}

#elif defined(__APPLE__) && (defined(__aarch64__) || defined(__arm64__))

/*
** All 64-bit ARM processors used by Apple (A7 and later, M1 and later)
** implement the ARMv8 cryptographic extensions
*/
static int
aesHardwareAvailableOnPlatform()
{
return 1;
}

#else

static int
Expand Down
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