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Merge pull request #8444 from Mbed-TLS/cvv-code-size

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code size for mbedtls_cipher_validate_values
This commit is contained in:
Dave Rodgman
2023-11-06 12:50:37 +00:00
committed by GitHub
parent e03270f2e0 e91d7c5d68
commit 4b67ac8adf
2 changed files with 111 additions and 41 deletions
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28
library/common.h
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@@ -294,18 +294,36 @@ static inline void mbedtls_xor_no_simd(unsigned char *r,
#define MBEDTLS_STATIC_ASSERT(expr, msg)
#endif
/* Define compiler branch hints */
#if defined(__has_builtin)
#if __has_builtin(__builtin_expect)
#define MBEDTLS_HAS_BUILTIN(x) __has_builtin(x)
#else
#define MBEDTLS_HAS_BUILTIN(x) 0
#endif
/* Define compiler branch hints */
#if MBEDTLS_HAS_BUILTIN(__builtin_expect)
#define MBEDTLS_LIKELY(x) __builtin_expect(!!(x), 1)
#define MBEDTLS_UNLIKELY(x) __builtin_expect(!!(x), 0)
#endif
#endif
#if !defined(MBEDTLS_LIKELY)
#else
#define MBEDTLS_LIKELY(x) x
#define MBEDTLS_UNLIKELY(x) x
#endif
/* MBEDTLS_ASSUME may be used to provide additional information to the compiler
* which can result in smaller code-size. */
#if MBEDTLS_HAS_BUILTIN(__builtin_assume)
/* clang provides __builtin_assume */
#define MBEDTLS_ASSUME(x) __builtin_assume(x)
#elif MBEDTLS_HAS_BUILTIN(__builtin_unreachable)
/* gcc and IAR can use __builtin_unreachable */
#define MBEDTLS_ASSUME(x) do { if (!(x)) __builtin_unreachable(); } while (0)
#elif defined(_MSC_VER)
/* Supported by MSVC since VS 2005 */
#define MBEDTLS_ASSUME(x) __assume(x)
#else
#define MBEDTLS_ASSUME(x) do { } while (0)
#endif
#if defined(__GNUC__) && !defined(__ARMCC_VERSION) && !defined(__clang__) \
&& !defined(__llvm__) && !defined(__INTEL_COMPILER)
/* Defined if the compiler really is gcc and not clang, etc */