From 0831f0d954925950f1672b8c72af3f97378b72df Mon Sep 17 00:00:00 2001
From: "igor.bukanov%gmail.com" <igor.bukanov%gmail.com>
Date: Mon, 13 Nov 2006 10:50:40 +0000
Subject: [PATCH] 360282: Debug-only warning about broken FPU state. r=brendan

---
 js/src/jsdtoa.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/js/src/jsdtoa.c b/js/src/jsdtoa.c
index 529a5739d54..0cb04c01268 100644
--- a/js/src/jsdtoa.c
+++ b/js/src/jsdtoa.c
@@ -2425,6 +2425,15 @@ js_dtoa(double d, int mode, JSBool biasUp, int ndigits,
             }
             d *= 10.;
         }
+#ifdef DEBUG
+        if (d != 0.0) {
+            fprintf(stderr,
+"WARNING: A loss of precision for double floating point is detected.\n"
+"         The result of any operation on doubles can be meaningless.\n"
+"         A possible cause is missing code to restore FPU state, see\n"
+"         bug 360282 for details.\n");
+        }
+#endif
         goto ret1;
     }