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Enable 8-byte fastpath in mbedtls_xor on ARM64 and ARM64EC

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Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
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Dave Rodgman
2023-08-08 10:42:55 +01:00
parent ad71b6a834
commit be09286666
1 changed files with 4 additions and 2 deletions
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6
library/common.h
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@@ -188,7 +188,8 @@ inline void mbedtls_xor(unsigned char *r, const unsigned char *a, const unsigned
uint8x16_t x = veorq_u8(v1, v2); uint8x16_t x = veorq_u8(v1, v2);
vst1q_u8(r + i, x); vst1q_u8(r + i, x);
} }
#elif defined(__amd64__) || defined(__x86_64__) || defined(__aarch64__) #elif defined(__amd64__) || defined(__x86_64__) || \
defined(__aarch64__) || defined(_M_ARM64) || defined(_M_ARM64EC)
/* This codepath probably only makes sense on architectures with 64-bit registers */ /* This codepath probably only makes sense on architectures with 64-bit registers */
for (; (i + 8) <= n; i += 8) { for (; (i + 8) <= n; i += 8) {
uint64_t x = mbedtls_get_unaligned_uint64(a + i) ^ mbedtls_get_unaligned_uint64(b + i); uint64_t x = mbedtls_get_unaligned_uint64(a + i) ^ mbedtls_get_unaligned_uint64(b + i);
@@ -227,7 +228,8 @@ static inline void mbedtls_xor_no_simd(unsigned char *r,
{ {
size_t i = 0; size_t i = 0;
#if defined(MBEDTLS_EFFICIENT_UNALIGNED_ACCESS) #if defined(MBEDTLS_EFFICIENT_UNALIGNED_ACCESS)
#if defined(__amd64__) || defined(__x86_64__) || defined(__aarch64__) #if defined(__amd64__) || defined(__x86_64__) || \
defined(__aarch64__) || defined(_M_ARM64) || defined(_M_ARM64EC)
/* This codepath probably only makes sense on architectures with 64-bit registers */ /* This codepath probably only makes sense on architectures with 64-bit registers */
for (; (i + 8) <= n; i += 8) { for (; (i + 8) <= n; i += 8) {
uint64_t x = mbedtls_get_unaligned_uint64(a + i) ^ mbedtls_get_unaligned_uint64(b + i); uint64_t x = mbedtls_get_unaligned_uint64(a + i) ^ mbedtls_get_unaligned_uint64(b + i);