Fix SH4 fraiseexcpt so to generate exceptions appropriately.

1 files changed, 36 insertions, 6 deletions

diff --git a/sysdeps/sh/sh4/fpu/fraiseexcpt.c b/sysdeps/sh/sh4/fpu/fraiseexcpt.c
index 0bed3a5..a555b10 100644
--- a/sysdeps/sh/sh4/fpu/fraiseexcpt.c
+++ b/sysdeps/sh/sh4/fpu/fraiseexcpt.c
@@ -1,6 +1,7 @@
 /* Raise given exceptions.
-   Copyright (C) 1997, 1998, 2000, 2002 Free Software Foundation, Inc.
+   Copyright (C) 1997, 1998, 2000, 2002, 2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
+   Contributed by Nobuhiro Iwamatsu <iwamatsu@nigauri.org>, 2012.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
@@ -17,18 +18,47 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include <fenv.h>
+#include <float.h>
 #include <fpu_control.h>
 #include <math.h>
 
 int
 feraiseexcept (int excepts)
 {
+  if (excepts == 0)
+    return 0;
+
   /* Raise exceptions represented by EXPECTS.  */
-  fexcept_t temp;
-  _FPU_GETCW (temp);
-  temp |= (excepts & FE_ALL_EXCEPT);
-  temp |= (excepts & FE_ALL_EXCEPT) << 5;
-  _FPU_SETCW (temp);
+
+  if (excepts & FE_INEXACT)
+  {
+    double d = 1.0, x = 3.0;
+    __asm__ __volatile__ ("fdiv %1, %0" : "+d" (d) : "d" (x));
+  }
+
+  if (excepts & FE_UNDERFLOW)
+  {
+    long double d = LDBL_MIN, x = 10;
+    __asm__ __volatile__ ("fdiv %1, %0" : "+d" (d) : "d" (x));
+  }
+
+  if (excepts & FE_OVERFLOW)
+  {
+    long double d = LDBL_MAX;
+    __asm__ __volatile__ ("fmul %0, %0" : "+d" (d) : "d" (d));
+  }
+
+  if (excepts & FE_DIVBYZERO)
+  {
+    double d = 1.0, x = 0.0;
+    __asm__ __volatile__ ("fdiv %1, %0" : "+d" (d) : "d" (x));
+  }
+
+  if (excepts & FE_INVALID)
+  {
+    double d = HUGE_VAL, x = 0.0;
+    __asm__ __volatile__ ("fmul %1, %0" : "+d" (d) : "d" (x));
+  }
 
   return 0;
 }