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-rw-r--r--sysdeps/s390/fpu/bits/fenv.h90
-rw-r--r--sysdeps/s390/fpu/fclrexcpt.c40
-rw-r--r--sysdeps/s390/fpu/fegetround.c35
-rw-r--r--sysdeps/s390/fpu/fesetround.c37
-rw-r--r--sysdeps/s390/fpu/fgetexcptflg.c46
-rw-r--r--sysdeps/s390/fpu/fpu_control.h47
6 files changed, 295 insertions, 0 deletions
diff --git a/sysdeps/s390/fpu/bits/fenv.h b/sysdeps/s390/fpu/bits/fenv.h
new file mode 100644
index 0000000000..81732b9972
--- /dev/null
+++ b/sysdeps/s390/fpu/bits/fenv.h
@@ -0,0 +1,90 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Denis Joseph Barrow (djbarrow@de.ibm.com).
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.
+
+ */
+
+#ifndef _FENV_H
+# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
+#endif
+
+/* Define bits representing the exception.  We use the bit positions
+   of the appropriate bits in the FPU control word.  */
+enum
+  {
+    FE_INVALID = 0x80,
+#define FE_INVALID	FE_INVALID
+    FE_DIVBYZERO = 0x40,
+#define FE_DIVBYZERO	FE_DIVBYZERO
+    FE_OVERFLOW = 0x20,
+#define FE_OVERFLOW	FE_OVERFLOW
+    FE_UNDERFLOW = 0x10,
+#define FE_UNDERFLOW	FE_UNDERFLOW
+    FE_INEXACT = 0x08
+#define FE_INEXACT	FE_INEXACT
+  };
+/* We dont use the y bit of the DXC in the floating point control register
+ * as glibc has no FE encoding for fe inexact incremented
+ * or fe inexact truncated.
+ * We currently  use the flag bits in the fpc
+ * as these are sticky for feholdenv & feupdatenv as it is defined
+ * in the HP Manpages.
+ */
+
+
+#define FE_ALL_EXCEPT \
+	(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
+
+enum
+  {
+    FE_TONEAREST = 0,
+#define FE_TONEAREST	FE_TONEAREST
+    FE_DOWNWARD = 0x3,
+#define FE_DOWNWARD	FE_DOWNWARD
+    FE_UPWARD = 0x2,
+#define FE_UPWARD	FE_UPWARD
+    FE_TOWARDZERO = 0x1
+#define FE_TOWARDZERO	FE_TOWARDZERO
+  };
+
+#define FPC_EXCEPTION_MASK_SHIFT  24
+#define FPC_FLAGS_SHIFT           16
+#define FPC_DXC_SHIFT             8
+#define FPC_NOT_FPU_EXCEPTION     0x300
+
+
+/* Type representing exception flags.  */
+typedef unsigned int fexcept_t; /* size of fpc */
+
+
+/* Type representing floating-point environment.  This function corresponds
+   to the layout of the block written by the `fstenv'.  */
+typedef struct
+{
+	fexcept_t fpc;
+	void *ieee_instruction_pointer;
+	/* failing instruction for ieee exceptions */
+} fenv_t;
+
+/* If the default argument is used we use this value.  */
+#define FE_DFL_ENV	((fenv_t *) -1)
+
+#ifdef __USE_GNU
+/* Floating-point environment where none of the exceptions are masked.  */
+#define FE_NOMASK_ENV	((fenv_t *) -2)
+#endif
diff --git a/sysdeps/s390/fpu/fclrexcpt.c b/sysdeps/s390/fpu/fclrexcpt.c
new file mode 100644
index 0000000000..aa159fd282
--- /dev/null
+++ b/sysdeps/s390/fpu/fclrexcpt.c
@@ -0,0 +1,40 @@
+/* Clear given exceptions in current floating-point environment.
+   Copyright (C) 2000 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+feclearexcept (int excepts)
+{
+  fexcept_t temp;
+
+  /* Mask out unsupported bits/exceptions.  */
+  excepts &= FE_ALL_EXCEPT;
+
+  _FPU_GETCW(temp);
+  /* Clear the relevant bits.  */
+  temp &= ~((excepts<<FPC_DXC_SHIFT)|(excepts<<FPC_FLAGS_SHIFT));
+
+  /* Put the new data in effect.  */
+  _FPU_SETCW(temp);
+
+  /* Success.  */
+  return 0;
+}
diff --git a/sysdeps/s390/fpu/fegetround.c b/sysdeps/s390/fpu/fegetround.c
new file mode 100644
index 0000000000..3742588629
--- /dev/null
+++ b/sysdeps/s390/fpu/fegetround.c
@@ -0,0 +1,35 @@
+/* Return current rounding direction.
+   Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Denis Joseph Barrow (djbarrow@de.ibm.com)
+
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+fegetround (void)
+{
+  fexcept_t cw;
+
+  _FPU_GETCW(cw);
+
+  return cw & FPC_RM_MASK;
+}
+
+
diff --git a/sysdeps/s390/fpu/fesetround.c b/sysdeps/s390/fpu/fesetround.c
new file mode 100644
index 0000000000..ba8c1b0be3
--- /dev/null
+++ b/sysdeps/s390/fpu/fesetround.c
@@ -0,0 +1,37 @@
+/* Set current rounding direction.
+   Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Denis Joseph Barrow (djbarrow@de.ibm.com)
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+fesetround (int round)
+{
+  if ((round|FPC_RM_MASK) != FPC_RM_MASK)
+    {
+      /* ROUND is not a valid rounding mode.  */
+      return 1;
+    }
+  __asm__ volatile ("srnm 0(%0)"
+		    :
+		    : "a" (round));
+  
+  return 0;
+}
diff --git a/sysdeps/s390/fpu/fgetexcptflg.c b/sysdeps/s390/fpu/fgetexcptflg.c
new file mode 100644
index 0000000000..d4a49d6731
--- /dev/null
+++ b/sysdeps/s390/fpu/fgetexcptflg.c
@@ -0,0 +1,46 @@
+/* Store current representation for exceptions.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  
+
+   Contributed by:
+   Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
+*/
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int fegetexceptflag (fexcept_t *flagp, int excepts)
+{
+	fexcept_t temp,newexcepts;
+	
+	/* Get the current exceptions.  */
+	_FPU_GETCW(temp);
+	newexcepts=((excepts<<FPC_DXC_SHIFT)|(excepts<<FPC_FLAGS_SHIFT));
+	*flagp = temp & newexcepts;
+
+	/* Success.  */
+	return 0;
+}
+
+
+
+
+
+
+
diff --git a/sysdeps/s390/fpu/fpu_control.h b/sysdeps/s390/fpu/fpu_control.h
new file mode 100644
index 0000000000..7552cfa8ff
--- /dev/null
+++ b/sysdeps/s390/fpu/fpu_control.h
@@ -0,0 +1,47 @@
+/* FPU control word definitions.  Stub version.
+   Copyright (C) 1999 Free Software Foundation, Inc.
+   Contributed by 
+   Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) and
+   Martin Schwidefsky (schwidefsky@de.ibm.com).
+   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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef _FPU_CONTROL_H
+# define _FPU_CONTROL_H
+
+# include <features.h>
+
+/* These bits are reserved are not changed.  */
+# define _FPU_RESERVED 0x070700FC
+
+/* The fdlibm code requires no interrupts for exceptions.  Don't
+   change the rounding mode, it would break long double I/O!  */
+#define _FPU_DEFAULT  0x00000000 /* Default value.  */
+
+/* Type of the control word.  */
+typedef unsigned int fpu_control_t;
+
+/* Macros for accessing the hardware control word.  */
+#define _FPU_GETCW(cw)  __asm__ volatile ("efpc %0,0" : "=d" (cw)) 
+#define _FPU_SETCW(cw)  __asm__ volatile ("sfpc  %0,0" : : "d" (cw)) 
+
+/* Default control word set at startup.  */
+extern fpu_control_t __fpu_control;
+
+#endif /* _FPU_CONTROL_H */
+
+
+
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