case CRC32_SSE42_x64:
if (! rte_cpu_get_flag_enabled(RTE_CPUFLAG_EM64T))
alg = CRC32_SSE42;
+#if __GNUC__ >= 7 && !defined(RTE_TOOLCHAIN_ICC)
+ __attribute__ ((fallthrough));
+#endif
case CRC32_SSE42:
if (! rte_cpu_get_flag_enabled(RTE_CPUFLAG_SSE4_2))
alg = CRC32_SW;
+#if __GNUC__ >= 7 && !defined(RTE_TOOLCHAIN_ICC)
+ __attribute__ ((fallthrough));
+#endif
#endif
case CRC32_SW:
crc32_alg = alg;