1 files changed, 90 insertions, 0 deletions
diff --git a/sysdeps/mips/tst-mode-switch-3.c b/sysdeps/mips/tst-mode-switch-3.c
new file mode 100644
index 0000000000..9cc725be1a
--- /dev/null
+++ b/sysdeps/mips/tst-mode-switch-3.c
@@ -0,0 +1,90 @@
+/* Copyright (C) 2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <setjmp.h>
+#include <sys/prctl.h>
+
+#if __mips_fpr != 0 || _MIPS_SPFPSET != 16
+# error This test requires -mfpxx -mno-odd-spreg
+#endif
+
+/* This test verifies that mode changes between a setjmp and longjmp do
+   not corrupt the state of callee-saved registers.  */
+
+static int mode[6] =
+  {
+    0,
+    PR_FP_MODE_FR,
+    PR_FP_MODE_FR | PR_FP_MODE_FRE,
+    PR_FP_MODE_FR,
+    0,
+    PR_FP_MODE_FR | PR_FP_MODE_FRE
+  };
+static jmp_buf env;
+float check1 = 2.0;
+double check2 = 3.0;
+
+int
+main (void)
+{
+  int i;
+  int result = 0;
+
+  for (i = 0 ; i < 7 ; i++)
+    {
+      int retval;
+      register float test1 __asm ("$f20");
+      register double test2 __asm ("$f22");
+
+      /* Hide what we are doing to $f20 and $f22 from the compiler.  */
+      __asm __volatile ("l.s %0,%2\n"
+			"l.d %1,%3\n"
+			: "=f" (test1), "=f" (test2)
+			: "m" (check1), "m" (check2));
+
+      retval = setjmp (env);
+
+      /* Make sure the compiler knows we want to access the variables
+         via the named registers again.  */
+      __asm __volatile ("" : : "f" (test1), "f" (test2));
+
+      if (test1 != check1 || test2 != check2)
+	{
+	  printf ("Corrupt register detected: $20 %f = %f, $22 %f = %f\n",
+		  test1, check1, test2, check2);
+	  result = 1;
+	}
+
+      if (retval == 0)
+	{
+	  if (prctl (PR_SET_FP_MODE, mode[i % 6]) != 0
+	      && errno != ENOTSUP)
+	    {
+	      printf ("prctl PR_SET_FP_MODE failed: %m");
+	      exit (1);
+	    }
+	  longjmp (env, 0);
+	}
+    }
+
+  return result;
+}