diff -Naur libvisual-0.4.0.org/aclocal.m4 libvisual-0.4.0.sw/aclocal.m4
--- libvisual-0.4.0.org/aclocal.m4	2022-03-11 06:16:49.382357080 +0000
+++ libvisual-0.4.0.sw/aclocal.m4	2022-03-11 06:19:02.902357080 +0000
@@ -9425,7 +9425,7 @@
         [
           # Guess based on the CPU.
           case "$host_cpu" in
-            alpha* | i[34567]86 | m68k | s390*)
+            sw_64* | alpha* | i[34567]86 | m68k | s390*)
               gt_cv_int_divbyzero_sigfpe="guessing yes";;
             *)
               gt_cv_int_divbyzero_sigfpe="guessing no";;
diff -Naur libvisual-0.4.0.org/configure libvisual-0.4.0.sw/configure
--- libvisual-0.4.0.org/configure	2022-03-11 06:16:49.392357080 +0000
+++ libvisual-0.4.0.sw/configure	2022-03-11 06:20:36.342357080 +0000
@@ -2011,6 +2011,7 @@
 
 lv_mips=no
 lv_alpha=no
+lv_sw_64=no
 lv_sparc=no
 lv_ix86=no
 lv_x86_64=no
@@ -2019,6 +2020,7 @@
 case "$host_cpu" in
 	mips)           lv_mips=yes;;
 	alpha)          lv_alpha=yes;;
+	sw_64)          lv_sw_64=yes;;
 	sparc)          lv_sparc=yes;;
 	i*86)           lv_ix86=yes;;
 	x86_64*)	lv_x86_64=yes;;
@@ -27200,6 +27202,7 @@
 
    lv_mips=$lv_mips
    lv_alpha=$lv_alpha
+   lv_sw_64=$lv_sw_64
    lv_sparc=$lv_sparc
    lv_ix86=$lv_ix86
    lv_powerpc=$lv_powerpc
@@ -28309,6 +28312,13 @@
 _______EOF
         fi
 
+        if test x$lv_sw_64 = xyes ; then
+                cat >>$outfile <<_______EOF
+
+#define VISUAL_ARCH_SW_64
+_______EOF
+        fi
+
         if test x$lv_alpha = xyes ; then
                 cat >>$outfile <<_______EOF
 
diff -Naur libvisual-0.4.0.org/configure.ac libvisual-0.4.0.sw/configure.ac
--- libvisual-0.4.0.org/configure.ac	2022-03-11 06:16:49.382357080 +0000
+++ libvisual-0.4.0.sw/configure.ac	2022-03-11 06:21:41.452357080 +0000
@@ -26,6 +26,7 @@
 
 lv_mips=no
 lv_alpha=no
+lv_sw_64=no
 lv_sparc=no
 lv_ix86=no
 lv_x86_64=no
@@ -34,6 +35,7 @@
 case "$host_cpu" in
 	mips)           lv_mips=yes;;
 	alpha)          lv_alpha=yes;;
+	sw_64)          lv_sw_64=yes;;
 	sparc)          lv_sparc=yes;;
 	i*86)           lv_ix86=yes;;
 	x86_64*)	lv_x86_64=yes;;
@@ -562,6 +564,13 @@
 _______EOF
         fi
 
+        if test x$lv_sw_64 = xyes ; then
+                cat >>$outfile <<_______EOF
+
+#define VISUAL_ARCH_SW_64
+_______EOF
+        fi
+
         if test x$lv_alpha = xyes ; then
                 cat >>$outfile <<_______EOF
 
@@ -778,6 +787,7 @@
  
    lv_mips=$lv_mips
    lv_alpha=$lv_alpha
+   lv_sw_64=$lv_sw_64
    lv_sparc=$lv_sparc
    lv_ix86=$lv_ix86
    lv_powerpc=$lv_powerpc
diff -Naur libvisual-0.4.0.org/m4/intdiv0.m4 libvisual-0.4.0.sw/m4/intdiv0.m4
--- libvisual-0.4.0.org/m4/intdiv0.m4	2022-03-11 06:16:49.382357080 +0000
+++ libvisual-0.4.0.sw/m4/intdiv0.m4	2022-03-11 06:18:20.462357080 +0000
@@ -56,7 +56,7 @@
         [
           # Guess based on the CPU.
           case "$host_cpu" in
-            alpha* | i[34567]86 | m68k | s390*)
+            sw_64* | alpha* | i[34567]86 | m68k | s390*)
               gt_cv_int_divbyzero_sigfpe="guessing yes";;
             *)
               gt_cv_int_divbyzero_sigfpe="guessing no";;