From 70c6c246a2758fcdc63536d2c7855a80e58613c6 Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@gmail.com>
Date: Fri, 23 Dec 2011 09:18:02 -0500
Subject: [PATCH] Optimize x86-32 feraiseexcept also for !__SSE_MATH__

---
 ChangeLog                    |  5 +++++
 sysdeps/i386/fpu/bits/fenv.h | 12 +++++++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 7d77002db1..74b628c95e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2011-12-23  Ulrich Drepper  <drepper@gmail.com>
+
+	* sysdeps/i386/fpu/bits/fenv.h (feraiseexcept): Also enable for
+	!__SSE_MATH__.
+
 2011-12-23  Liubov Dmitrieva  <liubov.dmitrieva@gmail.com>
 
 	* sysdeps/i386/i686/multiarch/wcscpy-ssse3.S: Fix wrong copying
diff --git a/sysdeps/i386/fpu/bits/fenv.h b/sysdeps/i386/fpu/bits/fenv.h
index e11e83f3dc..8c00771cce 100644
--- a/sysdeps/i386/fpu/bits/fenv.h
+++ b/sysdeps/i386/fpu/bits/fenv.h
@@ -90,7 +90,7 @@ fenv_t;
 #endif
 
 
-#if defined __SSE_MATH__ && defined __USE_EXTERN_INLINES
+#ifdef __USE_EXTERN_INLINES
 __BEGIN_DECLS
 
 /* Optimized versions.  */
@@ -106,7 +106,12 @@ __NTH (feraiseexcept (int __excepts))
 	  /* One example of a invalid operation is 0.0 / 0.0.  */
 	  float __f = 0.0;
 
+# ifdef __SSE_MATH__
 	  __asm__ __volatile__ ("divss %0, %0 " : : "x" (__f));
+# else
+	  __asm__ __volatile__ ("fdiv %%st, %%st(0); fwait"
+				: "=t" (__f) : "0" (__f));
+# endif
 	  (void) &__f;
 	}
       if ((FE_DIVBYZERO & __excepts) != 0)
@@ -114,7 +119,12 @@ __NTH (feraiseexcept (int __excepts))
 	  float __f = 1.0;
 	  float __g = 0.0;
 
+# ifdef __SSE_MATH__
 	  __asm__ __volatile__ ("divss %1, %0" : : "x" (__f), "x" (__g));
+# else
+	  __asm__ __volatile__ ("fdivp %%st(1), %%st; fwait"
+				: "=t" (__f) : "0" (__f), "u" (__g) : "st(1)");
+# endif
 	  (void) &__f;
 	}