# define AV_GCC_VERSION_AT_MOST(x,y) 0
#endif
+#ifdef __has_builtin
+# define AV_HAS_BUILTIN(x) __has_builtin(x)
+#else
+# define AV_HAS_BUILTIN(x) false
+#endif
+
#ifndef av_always_inline
#if AV_GCC_VERSION_AT_LEAST(3,1)
# define av_always_inline __attribute__((always_inline)) inline
* @return sum with signed saturation
*/
static av_always_inline int64_t av_sat_add64_c(int64_t a, int64_t b) {
+#if (!defined(__INTEL_COMPILER) && AV_GCC_VERSION_AT_LEAST(5,1)) || AV_HAS_BUILTIN(__builtin_add_overflow)
+ int64_t tmp;
+ return !__builtin_add_overflow(a, b, &tmp) ? tmp : (tmp < 0 ? INT64_MAX : INT64_MIN);
+#else
if (b >= 0 && a >= INT64_MAX - b)
return INT64_MAX;
if (b <= 0 && a <= INT64_MIN - b)
return INT64_MIN;
return a + b;
+#endif
}
/**
* @return difference with signed saturation
*/
static av_always_inline int64_t av_sat_sub64_c(int64_t a, int64_t b) {
+#if (!defined(__INTEL_COMPILER) && AV_GCC_VERSION_AT_LEAST(5,1)) || AV_HAS_BUILTIN(__builtin_sub_overflow)
+ int64_t tmp;
+ return !__builtin_sub_overflow(a, b, &tmp) ? tmp : (tmp < 0 ? INT64_MAX : INT64_MIN);
+#else
if (b <= 0 && a >= INT64_MAX + b)
return INT64_MAX;
if (b >= 0 && a <= INT64_MIN + b)
return INT64_MIN;
return a - b;
+#endif
}
/**