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authorJoseph Myers <joseph@codesourcery.com>2012-05-05 19:37:39 +0000
committerJoseph Myers <joseph@codesourcery.com>2012-05-05 19:37:39 +0000
commit41498f4db1ebfeb2fb76b9137cba38c20000f1d3 (patch)
treee546d5a208020a4dc1598ea46d5c819e9a1a20c0 /sysdeps/ieee754/dbl-64/w_exp.c
parent6698b8bf4365f09d5bb467e113068f210811b001 (diff)
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Fix missing exceptions from exp (bugs 13787, 13922, 14036).
Diffstat (limited to 'sysdeps/ieee754/dbl-64/w_exp.c')
-rw-r--r--sysdeps/ieee754/dbl-64/w_exp.c21
1 files changed, 5 insertions, 16 deletions
diff --git a/sysdeps/ieee754/dbl-64/w_exp.c b/sysdeps/ieee754/dbl-64/w_exp.c
index aa8ff7689f..14328a7b4b 100644
--- a/sysdeps/ieee754/dbl-64/w_exp.c
+++ b/sysdeps/ieee754/dbl-64/w_exp.c
@@ -19,27 +19,16 @@
 #include <math.h>
 #include <math_private.h>
 
-static const double
-o_threshold=  7.09782712893383973096e+02,  /* 0x40862E42, 0xFEFA39EF */
-u_threshold= -7.45133219101941108420e+02;  /* 0xc0874910, 0xD52D3051 */
-
-
 /* wrapper exp */
 double
 __exp (double x)
 {
-  if (__builtin_expect (isgreater (x, o_threshold), 0))
-    {
-      if (_LIB_VERSION != _IEEE_)
-	return __kernel_standard (x, x, 6);
-    }
-  else if (__builtin_expect (isless (x, u_threshold), 0))
-    {
-      if (_LIB_VERSION != _IEEE_)
-	return __kernel_standard (x, x, 7);
-    }
+  double z = __ieee754_exp (x);
+  if (__builtin_expect (!__finite (z) || z == 0, 0)
+      && __finite (x) && _LIB_VERSION != _IEEE_)
+    return __kernel_standard (x, x, 6 + !!__signbit (x));
 
-  return __ieee754_exp (x);
+  return z;
 }
 hidden_def (__exp)
 weak_alias (__exp, exp)