diff options
Diffstat (limited to 'libs/libsodium/src/crypto_verify/sodium/verify.c')
-rw-r--r-- | libs/libsodium/src/crypto_verify/sodium/verify.c | 196 |
1 files changed, 98 insertions, 98 deletions
diff --git a/libs/libsodium/src/crypto_verify/sodium/verify.c b/libs/libsodium/src/crypto_verify/sodium/verify.c index ffebf220a0..18e8c9c898 100644 --- a/libs/libsodium/src/crypto_verify/sodium/verify.c +++ b/libs/libsodium/src/crypto_verify/sodium/verify.c @@ -1,98 +1,98 @@ - -#include <stddef.h> -#include <stdint.h> - -#include "crypto_verify_16.h" -#include "crypto_verify_32.h" -#include "crypto_verify_64.h" - -size_t -crypto_verify_16_bytes(void) -{ - return crypto_verify_16_BYTES; -} - -size_t -crypto_verify_32_bytes(void) -{ - return crypto_verify_32_BYTES; -} - -size_t -crypto_verify_64_bytes(void) -{ - return crypto_verify_64_BYTES; -} - -#if defined(HAVE_EMMINTRIN_H) && defined(__SSE2__) - -# ifdef __GNUC__ -# pragma GCC target("sse2") -# endif -# include <emmintrin.h> - -static inline int -crypto_verify_n(const unsigned char *x_, const unsigned char *y_, - const int n) -{ - const __m128i zero = _mm_setzero_si128(); - volatile __m128i v1, v2, z; - volatile int m; - int i; - - const volatile __m128i *volatile x = - (const volatile __m128i *volatile) (const void *) x_; - const volatile __m128i *volatile y = - (const volatile __m128i *volatile) (const void *) y_; - v1 = _mm_loadu_si128((const __m128i *) &x[0]); - v2 = _mm_loadu_si128((const __m128i *) &y[0]); - z = _mm_xor_si128(v1, v2); - for (i = 1; i < n / 16; i++) { - v1 = _mm_loadu_si128((const __m128i *) &x[i]); - v2 = _mm_loadu_si128((const __m128i *) &y[i]); - z = _mm_or_si128(z, _mm_xor_si128(v1, v2)); - } - m = _mm_movemask_epi8(_mm_cmpeq_epi32(z, zero)); - v1 = zero; v2 = zero; z = zero; - - return (int) (((uint32_t) m + 1U) >> 16) - 1; -} - -#else - -static inline int -crypto_verify_n(const unsigned char *x_, const unsigned char *y_, - const int n) -{ - const volatile unsigned char *volatile x = - (const volatile unsigned char *volatile) x_; - const volatile unsigned char *volatile y = - (const volatile unsigned char *volatile) y_; - volatile uint_fast16_t d = 0U; - int i; - - for (i = 0; i < n; i++) { - d |= x[i] ^ y[i]; - } - return (1 & ((d - 1) >> 8)) - 1; -} - -#endif - -int -crypto_verify_16(const unsigned char *x, const unsigned char *y) -{ - return crypto_verify_n(x, y, crypto_verify_16_BYTES); -} - -int -crypto_verify_32(const unsigned char *x, const unsigned char *y) -{ - return crypto_verify_n(x, y, crypto_verify_32_BYTES); -} - -int -crypto_verify_64(const unsigned char *x, const unsigned char *y) -{ - return crypto_verify_n(x, y, crypto_verify_64_BYTES); -} +
+#include <stddef.h>
+#include <stdint.h>
+
+#include "crypto_verify_16.h"
+#include "crypto_verify_32.h"
+#include "crypto_verify_64.h"
+
+size_t
+crypto_verify_16_bytes(void)
+{
+ return crypto_verify_16_BYTES;
+}
+
+size_t
+crypto_verify_32_bytes(void)
+{
+ return crypto_verify_32_BYTES;
+}
+
+size_t
+crypto_verify_64_bytes(void)
+{
+ return crypto_verify_64_BYTES;
+}
+
+#if defined(HAVE_EMMINTRIN_H) && defined(__SSE2__)
+
+# ifdef __GNUC__
+# pragma GCC target("sse2")
+# endif
+# include <emmintrin.h>
+
+static inline int
+crypto_verify_n(const unsigned char *x_, const unsigned char *y_,
+ const int n)
+{
+ const __m128i zero = _mm_setzero_si128();
+ volatile __m128i v1, v2, z;
+ volatile int m;
+ int i;
+
+ const volatile __m128i *volatile x =
+ (const volatile __m128i *volatile) (const void *) x_;
+ const volatile __m128i *volatile y =
+ (const volatile __m128i *volatile) (const void *) y_;
+ v1 = _mm_loadu_si128((const __m128i *) &x[0]);
+ v2 = _mm_loadu_si128((const __m128i *) &y[0]);
+ z = _mm_xor_si128(v1, v2);
+ for (i = 1; i < n / 16; i++) {
+ v1 = _mm_loadu_si128((const __m128i *) &x[i]);
+ v2 = _mm_loadu_si128((const __m128i *) &y[i]);
+ z = _mm_or_si128(z, _mm_xor_si128(v1, v2));
+ }
+ m = _mm_movemask_epi8(_mm_cmpeq_epi32(z, zero));
+ v1 = zero; v2 = zero; z = zero;
+
+ return (int) (((uint32_t) m + 1U) >> 16) - 1;
+}
+
+#else
+
+static inline int
+crypto_verify_n(const unsigned char *x_, const unsigned char *y_,
+ const int n)
+{
+ const volatile unsigned char *volatile x =
+ (const volatile unsigned char *volatile) x_;
+ const volatile unsigned char *volatile y =
+ (const volatile unsigned char *volatile) y_;
+ volatile uint_fast16_t d = 0U;
+ int i;
+
+ for (i = 0; i < n; i++) {
+ d |= x[i] ^ y[i];
+ }
+ return (1 & ((d - 1) >> 8)) - 1;
+}
+
+#endif
+
+int
+crypto_verify_16(const unsigned char *x, const unsigned char *y)
+{
+ return crypto_verify_n(x, y, crypto_verify_16_BYTES);
+}
+
+int
+crypto_verify_32(const unsigned char *x, const unsigned char *y)
+{
+ return crypto_verify_n(x, y, crypto_verify_32_BYTES);
+}
+
+int
+crypto_verify_64(const unsigned char *x, const unsigned char *y)
+{
+ return crypto_verify_n(x, y, crypto_verify_64_BYTES);
+}
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