mips.h (UNITS_PER_HWFPVALUE): Renamed from...

* config/mips/mips.h (UNITS_PER_HWFPVALUE): Renamed from...
(UNITS_PER_FPVALUE): Defined as the width of a long double, or
zero if no hardware floating point.
(LONG_DUBLE_TYPE_SIZE): Set to 128 on N32 and N64.
(MAX_FIXED_MODE_SIZE): Define to LONG_DOUBLE_TYPE_SIZE.
(LIBGCC2_LONG_DOUBLE_TYPE_SIZE): Define.
(BIGGEST_ALIGNMENT): Same as LONG_DOUBLE_TYPE_SIZE.
(FUNCTION_VALUE_REGNO_P): Set for FP_RETURN+2 on N32 and N64.
* config/mips/mips.c (mips_arg_info): Pass TFmode values in
even FP registers on N32 and N64.
(mips_setup_incoming_varargs): Use UNITS_PER_HWFPVALUE.
(mips_va_start): Adjust alignment of ARG_POINTER_REGNUM.
(mips_va_arg): Use UNITS_PER_HWFPVALUE.  Impose additional
even-register-like alignment to 128-bit arguments.
(save_restore_insns): Use UNITS_PER_HWFPVALUE.
(mips_function_value): Likewise.  Return TFmode in $f0 and $f2
on N32 or N64.
* config/mips/_tilib.c (__negti2, __ashlti3, __lshrti3): New.
* config/mips/t-iris6 (LIB2FUNCS_EXTRA): Add _tilib.c.
(TPBIT): Set to tp-bit.c.
(tp-bit.c): Create out of fp-bit.c.

From-SVN: r61977

gcc/config/mips/_tilib.c

@@ -0,0 +1,162 @@
+/* A few TImode functions needed for TFmode emulated arithmetic.
+   Copyright 2002, 2003 Free Software Foundation, Inc.
+   Contributed by Alexandre Oliva <aoliva@redhat.com>
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GCC 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING.  If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+
+#include "tconfig.h"
+#include "tsystem.h"
+#include "defaults.h"
+
+#ifndef LIBGCC2_WORDS_BIG_ENDIAN
+#define LIBGCC2_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
+#endif
+
+#if _MIPS_SIM == 2 /* N32 */ || _MIPS_SIM == 3 /* 64 */
+
+typedef int TItype __attribute__ ((mode (TI)));
+typedef int DItype __attribute__ ((mode (DI)));
+typedef int SItype __attribute__ ((mode (SI)));
+
+typedef unsigned int UDItype __attribute__ ((mode (DI)));
+
+typedef union
+{
+  struct TIstruct {
+#if LIBGCC2_WORDS_BIG_ENDIAN
+    DItype high, low;
+#else
+    DItype low, high;
+#endif
+  } s;
+  TItype ll;
+} TIunion;
+
+TItype __negti2 (TItype);
+TItype __ashlti3 (TItype, int);
+#if 0
+TItype __ashrti3 (TItype, int);
+#endif
+TItype __lshrti3 (TItype, int);
+
+TItype
+__negti2 (TItype u)
+{
+  TIunion w;
+  TIunion uu;
+
+  uu.ll = u;
+
+  w.s.low = -uu.s.low;
+  w.s.high = -uu.s.high - ((UDItype) w.s.low > 0);
+
+  return w.ll;
+}
+
+TItype
+__ashlti3 (TItype u, int b)
+{
+  TIunion w;
+  int bm;
+  TIunion uu;
+
+  if (b == 0)
+    return u;
+
+  uu.ll = u;
+
+  bm = (sizeof (DItype) * BITS_PER_UNIT) - b;
+  if (bm <= 0)
+    {
+      w.s.low = 0;
+      w.s.high = (UDItype) uu.s.low << -bm;
+    }
+  else
+    {
+      UDItype carries = (UDItype) uu.s.low >> bm;
+
+      w.s.low = (UDItype) uu.s.low << b;
+      w.s.high = ((UDItype) uu.s.high << b) | carries;
+    }
+
+  return w.ll;
+}
+
+#if 0
+TItype
+__ashrti3 (TItype u, int b)
+{
+  TIunion w;
+  int bm;
+  TIunion uu;
+
+  if (b == 0)
+    return u;
+
+  uu.ll = u;
+
+  bm = (sizeof (DItype) * BITS_PER_UNIT) - b;
+  if (bm <= 0)
+    {
+      /* w.s.high = 1..1 or 0..0 */
+      w.s.high = uu.s.high >> (sizeof (DItype) * BITS_PER_UNIT - 1);
+      w.s.low = uu.s.high >> -bm;
+    }
+  else
+    {
+      UDItype carries = (UDItype) uu.s.high << bm;
+
+      w.s.high = uu.s.high >> b;
+      w.s.low = ((UDItype) uu.s.low >> b) | carries;
+    }
+
+  return w.ll;
+}
+#endif
+
+TItype
+__lshrti3 (TItype u, int b)
+{
+  TIunion w;
+  int bm;
+  TIunion uu;
+
+  if (b == 0)
+    return u;
+
+  uu.ll = u;
+
+  bm = (sizeof (DItype) * BITS_PER_UNIT) - b;
+  if (bm <= 0)
+    {
+      w.s.high = 0;
+      w.s.low = (UDItype) uu.s.high >> -bm;
+    }
+  else
+    {
+      UDItype carries = (UDItype) uu.s.high << bm;
+
+      w.s.high = (UDItype) uu.s.high >> b;
+      w.s.low = ((UDItype) uu.s.low >> b) | carries;
+    }
+
+  return w.ll;
+}
+
+#endif /* N32 or N64 */