Merge pull request #3938 from martin-frbg/issue3937

Fix CMAKE-based cross-compilation to CortexA53 (wrong DGEMM setting)

Author: martin-frbg

cmake/prebuild.cmake

@@ -886,7 +886,11 @@ else ()
     set(SGEMM_UNROLL_M 8)
     set(SGEMM_UNROLL_N 8)
 endif ()
+if ("${TCORE}" STREQUAL "CORTEXA53")
+    set(DGEMM_UNROLL_M 4)
+else ()
     set(DGEMM_UNROLL_M 8)
+endif ()    
     set(DGEMM_UNROLL_N 4)
     set(CGEMM_UNROLL_M 8)
     set(CGEMM_UNROLL_N 4)