Fix missing clobber in i386 __sincos_code asm.

diff --git a/ChangeLog b/ChangeLog
index 58006ee..7be8eb0 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2012-04-09  Roland McGrath  <roland@hack.frob.com>
+
+       * sysdeps/i386/fpu/bits/mathinline.h (__sincos_code): Don't clobber
+       %eax without telling the compiler.
+
 2012-04-09  Carlos O'Donell  <carlos_odonell@mentor.com>
 
        [BZ # 13963]

diff --git a/sysdeps/i386/fpu/bits/mathinline.h b/sysdeps/i386/fpu/bits/mathinline.h
index 276acf8..6561eba 100644 (file)
--- a/sysdeps/i386/fpu/bits/mathinline.h
+++ b/sysdeps/i386/fpu/bits/mathinline.h
@@ -1,6 +1,5 @@
 /* Inline math functions for i387.
-   Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2003,2004,2006,2007,2009,
-   2010 Free Software Foundation, Inc.
+   Copyright (C) 1995-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by John C. Bowman <bowman@math.ualberta.ca>, 1995.
 
@@ -324,22 +323,23 @@ __inline_mathcode (__pow2, __x, \
 #  define __sincos_code \
   register long double __cosr;                                               \
   register long double __sinr;                                               \
+  register unsigned int __swtmp;                                             \
   __asm __volatile__                                                         \
     ("fsincos\n\t"                                                           \
-     "fnstsw   %%ax\n\t"                                                     \
-     "testl    $0x400, %%eax\n\t"                                            \
+     "fnstsw   %w2\n\t"                                                      \
+     "testl    $0x400, %2\n\t"                                               \
      "jz       1f\n\t"                                                       \
      "fldpi\n\t"                                                             \
      "fadd     %%st(0)\n\t"                                                  \
      "fxch     %%st(1)\n\t"                                                  \
      "2: fprem1\n\t"                                                         \
-     "fnstsw   %%ax\n\t"                                                     \
-     "testl    $0x400, %%eax\n\t"                                            \
+     "fnstsw   %w2\n\t"                                                      \
+     "testl    $0x400, %2\n\t"                                               \
      "jnz      2b\n\t"                                                       \
      "fstp     %%st(1)\n\t"                                                  \
      "fsincos\n\t"                                                           \
      "1:"                                                                    \
-     : "=t" (__cosr), "=u" (__sinr) : "0" (__x));                            \
+     : "=t" (__cosr), "=u" (__sinr), "=a" (__swtmp) : "0" (__x));            \
   *__sinx = __sinr;                                                          \
   *__cosx = __cosr