gdb/

	* ppc-linux-nat.c (ppc_register_u_addr): Add special case to return
	offset for full 64-bit slot of FPSCR when in 32-bits.
	(ppc_linux_read_description): Return target description with 64-bit
	FPSCR when inferior is running on an ISA 2.05 or later processor.
	* ppc-linux-tdep.c (_initialize_ppc_linux_tdep): Call
	initialize_tdec_powerpc_isa205_32l,
	initialize_tdec_powerpc_isa205_altivec32l,
	initialize_tdec_powerpc_isa205_vsx32l,
	initialize_tdec_powerpc_isa205_64l,
	initialize_tdec_powerpc_isa205_altivec64l and
	initialize_tdec_powerpc_isa205_vsx64l.
	* ppc-linux-tdep.h: Add external declaration for
	tdesc_powerpc_isa205_32l, tdesc_powerpc_isa205_altivec32l,
	tdesc_powerpc_isa205_vsx32l, tdesc_powerpc_isa205_64l,
	tdesc_powerpc_isa205_altivec64l and tdesc_powerpc_isa205_vsx64l.
	* features/rs600/powerpc-fpu-isa205.xml: New file.
	* features/rs600/powerpc-isa205-32l.xml: New file.
	* features/rs600/powerpc-isa205-64l.xml: New file.
	* features/rs600/powerpc-isa205-altivec32l.xml: New file.
	* features/rs600/powerpc-isa205-altivec64l.xml: New file.
	* features/rs600/powerpc-isa205-vsx32l.xml: New file.
	* features/rs600/powerpc-isa205-vsx64l.xml: New file.
	* features/rs600/powerpc-isa205-32l.c: Generate.
	* features/rs600/powerpc-isa205-64l.c: Generate.
	* features/rs600/powerpc-isa205-altivec32l.c: Generate.
	* features/rs600/powerpc-isa205-altivec64l.c: Generate.
	* features/rs600/powerpc-isa205-vsx32l.c: Generate.
	* features/rs600/powerpc-isa205-vsx64l.c: Generate.

gdb/testsuite/
	* gdb.arch/ppc-dfp.exp: New file.
	* gdb.arch/ppc-dfp.c: New file.

2 files changed, 125 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.arch/ppc-dfp.c b/gdb/testsuite/gdb.arch/ppc-dfp.c
new file mode 100644
index 00000000000..da0e44e8389
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/ppc-dfp.c
@@ -0,0 +1,46 @@
+/* Copyright 2008 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program 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 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <elf.h>
+
+#ifdef __powerpc64__
+typedef Elf64_auxv_t auxv_t;
+#else
+typedef Elf32_auxv_t auxv_t;
+#endif
+
+#ifndef PPC_FEATURE_HAS_DFP
+#define PPC_FEATURE_HAS_DFP	0x00000400
+#endif
+
+int
+main (int argc, char *argv[], char *envp[], auxv_t auxv[])
+{
+  int i;
+
+  for (i = 0; auxv[i].a_type != AT_NULL; i++)
+    if (auxv[i].a_type == AT_HWCAP) {
+      if (!(auxv[i].a_un.a_val & PPC_FEATURE_HAS_DFP))
+	return 1;
+
+      break;
+    }
+
+  asm ("mtfsfi 7, 5, 1\n");  /* Set DFP rounding mode.  */
+
+  return 0;
+}
diff --git a/gdb/testsuite/gdb.arch/ppc-dfp.exp b/gdb/testsuite/gdb.arch/ppc-dfp.exp
new file mode 100644
index 00000000000..3d87998e936
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/ppc-dfp.exp
@@ -0,0 +1,79 @@
+# Copyright (C) 2008 Free Software Foundation, Inc.
+#
+# This program 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 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+# Tests for Powerpc Decimal Floating Point registers setting and fetching
+
+if $tracelevel then {
+    strace $tracelevel
+}
+
+if ![istarget "powerpc*"] then {
+    verbose "Skipping powerpc decimal floating point register tests."
+    return
+}
+
+set testfile "ppc-dfp"
+set binfile ${objdir}/${subdir}/${testfile}
+set srcfile ${testfile}.c
+
+if [get_compiler_info $binfile] {
+    warning "get_compiler failed"
+    return -1
+}
+
+if ![test_compiler_info gcc*] {
+    # We use GCC's extended asm syntax
+    warning "unknown compiler"
+    return -1
+}
+
+if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {quiet debug}] != "" } {
+    unsupported "This machine doesn't support Decimal Floating Point."
+    return -1
+}
+
+# Start with a fresh gdb.
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${binfile}
+
+gdb_breakpoint [gdb_get_line_number "Set DFP rounding mode."]
+
+gdb_run_cmd
+
+# When the prompt comes back we'll be at the Set DFP rounding mode breakpoint.
+# Unless the program bails out after checking AT_HWCAP.
+gdb_expect {
+  -re "Program exited with code 01.\[\r\n\]+$gdb_prompt $" {
+    unsupported "This machine doesn't support Decimal Floating Point."
+    return -1
+  }
+
+  -re ".*$gdb_prompt $" {}
+}
+
+# First, verify if FPSCR is all zeroes.
+gdb_test "print \$fpscr" " = 0" "FPSCR is all zeroes"
+
+# Step over "set rounding mode" instruction.
+gdb_test "next" "" ""
+
+# Verify that the following bits are set (See Power ISA for details):
+#
+# 29:31 - DFP Rounding Control
+gdb_test "print/t \$fpscr" " = 10100000000000000000000000000000000" "FPSCR for round to nearest, ties toward zero rounding mode"