Avoid SIGFPE in Tru64.

p4raw-id: //depot/perl@11592

diff --git a/numeric.c b/numeric.c
index e7a5e8d..8d94975 100644 (file)
--- a/numeric.c
+++ b/numeric.c
@@ -580,6 +580,11 @@ S_mulexp10(NV value, I32 exponent)
         return NV_MAX;
 #  endif
 #endif
+#if defined(__alpha) && defined(__unix__)
+    if (!negative &&
+       (log10(value) + exponent) >= (DBL_MAX_10_EXP))
+        return NV_INF;
+#endif
     for (bit = 1; exponent; bit <<= 1) {
        if (exponent & bit) {
            exponent ^= bit;