about summary refs log tree commit diff
path: root/sysdeps/sh/sh4/fpu/fraiseexcpt.c
diff options
context:
space:
mode:
authorKaz Kojima <kkojima@rr.iij4u.or.jp>2012-04-05 11:53:49 +0900
committerKaz Kojima <kkojima@rr.iij4u.or.jp>2012-04-05 11:53:49 +0900
commit8a53f50f2a8ab4e1166afa0e9a8d4abc62b0ed4e (patch)
treefa72b2abad1cead529a3fcd7efc03df3dcac9a3a /sysdeps/sh/sh4/fpu/fraiseexcpt.c
parent15a946b57a1e7f4ba95b63572062860ca1a5e58f (diff)
downloadglibc-8a53f50f2a8ab4e1166afa0e9a8d4abc62b0ed4e.tar.gz
glibc-8a53f50f2a8ab4e1166afa0e9a8d4abc62b0ed4e.tar.xz
glibc-8a53f50f2a8ab4e1166afa0e9a8d4abc62b0ed4e.zip
Fix SH4 fraiseexcpt so to generate exceptions appropriately.
Diffstat (limited to 'sysdeps/sh/sh4/fpu/fraiseexcpt.c')
-rw-r--r--sysdeps/sh/sh4/fpu/fraiseexcpt.c42
1 files changed, 36 insertions, 6 deletions
diff --git a/sysdeps/sh/sh4/fpu/fraiseexcpt.c b/sysdeps/sh/sh4/fpu/fraiseexcpt.c
index 0bed3a5297..a555b10885 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;
 }