First Commit

ext/arm32-neon-salsa2012-asm/README.md

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+ARM NEON (32-bit) ASM implementation of Salsa20/12
+======
+
+This is from [supercop](http://bench.cr.yp.to/supercop.html) and was originally written by Daniel J. Bernstein. Code is in the public domain like the rest of Salsa20. It's much faster than the naive implementation.
+
+It's included automatically in 32-bit Linux ARM builds. It likely will not work on 64-bit ARM, so it'll need to be ported at least. That will unfortunately keep it out of mobile versions for now since those are all going 64-bit.

ext/arm32-neon-salsa2012-asm/salsa2012.h

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+#ifndef ZT_SALSA2012_ARM32NEON_ASM
+#define ZT_SALSA2012_ARM32NEON_ASM
+
+#if defined(__linux__) || defined(linux) || defined(__LINUX__) || defined(__linux)
+#include <sys/auxv.h>
+#include <asm/hwcap.h>
+#define zt_arm_has_neon() ((getauxval(AT_HWCAP) & HWCAP_NEON) != 0)
+#elif defined(__ARM_NEON__) || defined(__ARM_NEON)
+#define zt_arm_has_neon() (true)
+#else
+#define zt_arm_has_neon() (false)
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// ciphertext buffer, message/NULL, length, nonce (8 bytes), key (32 bytes)
+extern int zt_salsa2012_armneon3_xor(unsigned char *c,const unsigned char *m,unsigned long long len,const unsigned char *n,const unsigned char *k);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif