--- top/top.c
+++ top/top.c	2015-01-27 15:25:34.329519296 +0000
@@ -2302,8 +2302,15 @@ static void zap_fieldstab (void) {
    Fieldstab[EU_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[EU_CPU].width = 8;
+      } else if (smp_num_cpus > 100) {
+	 if (Cpu_pmax > 999999.0) Cpu_pmax = 999999.0;
+	 Fieldstab[EU_CPU].width = 7;
+      } else if (smp_num_cpus > 10) {
          if (Cpu_pmax > 99999.0) Cpu_pmax = 99999.0;
+	 Fieldstab[EU_CPU].width = 6;
       } else {
          if (Cpu_pmax > 999.9) Cpu_pmax = 999.9;
       }
@@ -2313,12 +2320,18 @@ static void zap_fieldstab (void) {
    Fieldstab[EU_CPU].width = 4;
    if (Rc.mode_irixps && smp_num_cpus > 1 && !Thread_mode) {
       Cpu_pmax = 100.0 * smp_num_cpus;
+      if (smp_num_cpus > 1000) {
+	 if (Cpu_pmax > 9999999.0) Cpu_pmax = 9999999.0;
+	  Fieldstab[EU_CPU].width = 7;
+      } else if (smp_num_cpus > 100) {
+	 if (Cpu_pmax > 999999.0) Cpu_pmax = 999999.0;
+	 Fieldstab[EU_CPU].width = 6;
       if (smp_num_cpus > 10) {
          if (Cpu_pmax > 99999.0) Cpu_pmax = 99999.0;
+	 Fieldstab[EU_CPU].width = 5;
       } else {
          if (Cpu_pmax > 999.9) Cpu_pmax = 999.9;
       }
-      Fieldstab[EU_CPU].width = 5;
    }
 #endif