add sse3 compiler flag

Makefile.x86_64

@@ -8,6 +8,11 @@ endif
 endif
 endif
 
+ifdef HAVE_SSE3
+CCOMMON_OPT += -msse3
+FCOMMON_OPT += -msse3
+endif
+
 ifeq ($(CORE), SKYLAKEX)
 ifndef DYNAMIC_ARCH
 ifndef NO_AVX512

cmake/system.cmake

@@ -70,6 +70,9 @@ if (DEFINED TARGET)
       set (KERNEL_DEFINITIONS "${KERNEL_DEFINITIONS} -mavx2")
     endif()
   endif()
+  if (DEFINED HAVE_SSE3)
+    set (KERNEL_DEFINITIONS "${KERNEL_DEFINITIONS} -msse3")
+  endif()
 endif()
 
 if (DEFINED TARGET)

kernel/Makefile

@@ -5,6 +5,9 @@ endif
 TOPDIR	= ..
 include $(TOPDIR)/Makefile.system
 
+ifdef HAVE_SSE3
+CFLAGS += -msse3
+endif
 
 ifeq ($(C_COMPILER), GCC)
 GCCVERSIONGTEQ9 := $(shell expr `$(CC) -dumpversion | cut -f1 -d.` \>= 9)