+2020-09-28  Przemyslaw Wirkus  <przemyslaw.wirkus@arm.com>
+
+       * config/tc-aarch64.c: (aarch64_cpus): Add Cortex-X1.
+       * doc/c-aarch64.texi: Document -mcpu=cortex-x1.
+
 2020-09-28  Przemyslaw Wirkus  <przemyslaw.wirkus@arm.com>
 
         * testsuite/gas/aarch64/ete.d: New test.
 
   {"xgene2", AARCH64_FEATURE (AARCH64_ARCH_V8,
                              AARCH64_FEATURE_CRC), "APM X-Gene 2"},
   {"cortex-r82", AARCH64_ARCH_V8_R, "Cortex-R82"},
+  {"cortex-x1", AARCH64_FEATURE (AARCH64_ARCH_V8_2,
+                AARCH64_FEATURE_DOTPROD | AARCH64_FEATURE_PROFILE),
+  "Cortex-X1"},
   {"generic", AARCH64_ARCH_V8, NULL},
 
   {NULL, AARCH64_ARCH_NONE, NULL}