--- top/top.c
+++ top/top.c	2012-10-30 11:34:42.634844811 +0000
@@ -1910,8 +1910,15 @@ static void zap_fieldstab (void) {
    Fieldstab[P_CPU].width = 5;
    if (Rc.mode_irixps && smp_num_cpus() > 1 && !Thread_mode) {
       Cpu_pmax = 100.0 * smp_num_cpus();
-      if (smp_num_cpus() > 10) {
+      if (smp_num_cpus() > 1000) {
+	 if (Cpu_pmax > 9999999.0) Cpu_pmax = 9999999.0;
+         Fieldstab[P_CPU].width = 8;
+      } else if (smp_num_cpus() > 100) {
+	 if (Cpu_pmax > 999999.0) Cpu_pmax = 999999.0;
+         Fieldstab[P_CPU].width = 7;
+      } else if (smp_num_cpus() > 10) {
          if (Cpu_pmax > 99999.0) Cpu_pmax = 99999.0;
+         Fieldstab[P_CPU].width = 6;
       } else {
          if (Cpu_pmax > 999.9) Cpu_pmax = 999.9;
       }
@@ -1921,12 +1928,18 @@ static void zap_fieldstab (void) {
    Fieldstab[P_CPU].width = 4;
    if (Rc.mode_irixps && smp_num_cpus() > 1 && !Thread_mode) {
       Cpu_pmax = 100.0 * smp_num_cpus();
-      if (smp_num_cpus() > 10) {
+      if (smp_num_cpus() > 1000) {
+	 if (Cpu_pmax > 9999999.0) Cpu_pmax = 9999999.0;
+         Fieldstab[P_CPU].width = 7;
+      } else if (smp_num_cpus() > 100) {
+	 if (Cpu_pmax > 999999.0) Cpu_pmax = 999999.0;
+         Fieldstab[P_CPU].width = 6;
+      } else if (smp_num_cpus() > 10) {
          if (Cpu_pmax > 99999.0) Cpu_pmax = 99999.0;
+         Fieldstab[P_CPU].width = 5;
       } else {
          if (Cpu_pmax > 999.9) Cpu_pmax = 999.9;
       }
-      Fieldstab[P_CPU].width = 5;
    }
 #endif