--- /dev/null
+/* Common hooks for IBM S/390 and zSeries.
+ Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
+ 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
+
+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 3, 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 COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "diagnostic-core.h"
+#include "tm.h"
+#include "common/common-target.h"
+#include "common/common-target-def.h"
+#include "opts.h"
+#include "flags.h"
+
+EXPORTED_CONST int processor_flags_table[] =
+ {
+ /* g5 */ PF_IEEE_FLOAT,
+ /* g6 */ PF_IEEE_FLOAT,
+ /* z900 */ PF_IEEE_FLOAT | PF_ZARCH,
+ /* z990 */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT,
+ /* z9-109 */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT
+ | PF_EXTIMM,
+ /* z9-ec */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT
+ | PF_EXTIMM | PF_DFP,
+ /* z10 */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT
+ | PF_EXTIMM | PF_DFP | PF_Z10,
+ /* z196 */ PF_IEEE_FLOAT | PF_ZARCH | PF_LONG_DISPLACEMENT
+ | PF_EXTIMM | PF_DFP | PF_Z10 | PF_Z196
+ };
+
+/* Change optimizations to be performed, depending on the
+ optimization level. */
+
+static const struct default_options s390_option_optimization_table[] =
+ {
+ { OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
+
+ /* ??? There are apparently still problems with -fcaller-saves. */
+ { OPT_LEVELS_ALL, OPT_fcaller_saves, NULL, 0 },
+
+ /* Use MVCLE instructions to decrease code size if requested. */
+ { OPT_LEVELS_SIZE, OPT_mmvcle, NULL, 1 },
+
+ { OPT_LEVELS_NONE, 0, NULL, 0 }
+ };
+
+/* Implement TARGET_OPTION_INIT_STRUCT. */
+
+static void
+s390_option_init_struct (struct gcc_options *opts)
+{
+ /* By default, always emit DWARF-2 unwind info. This allows debugging
+ without maintaining a stack frame back-chain. */
+ opts->x_flag_asynchronous_unwind_tables = 1;
+}
+
+/* Implement TARGET_HANDLE_OPTION. */
+
+static bool
+s390_handle_option (struct gcc_options *opts,
+ struct gcc_options *opts_set ATTRIBUTE_UNUSED,
+ const struct cl_decoded_option *decoded,
+ location_t loc)
+{
+ size_t code = decoded->opt_index;
+ const char *arg = decoded->arg;
+ int value = decoded->value;
+
+ switch (code)
+ {
+ case OPT_march_:
+ opts->x_s390_arch_flags = processor_flags_table[value];
+ opts->x_s390_arch_string = arg;
+ return true;
+
+ case OPT_mstack_guard_:
+ if (exact_log2 (value) == -1)
+ error_at (loc, "stack guard value must be an exact power of 2");
+ return true;
+
+ case OPT_mstack_size_:
+ if (exact_log2 (value) == -1)
+ error_at (loc, "stack size must be an exact power of 2");
+ return true;
+
+ case OPT_mtune_:
+ opts->x_s390_tune_flags = processor_flags_table[value];
+ return true;
+
+ case OPT_mwarn_framesize_:
+ return sscanf (arg, HOST_WIDE_INT_PRINT_DEC,
+ &opts->x_s390_warn_framesize) == 1;
+
+ default:
+ return true;
+ }
+}
+
+#undef TARGET_DEFAULT_TARGET_FLAGS
+#define TARGET_DEFAULT_TARGET_FLAGS (TARGET_DEFAULT)
+
+#undef TARGET_HANDLE_OPTION
+#define TARGET_HANDLE_OPTION s390_handle_option
+
+#undef TARGET_OPTION_OPTIMIZATION_TABLE
+#define TARGET_OPTION_OPTIMIZATION_TABLE s390_option_optimization_table
+
+#undef TARGET_OPTION_INIT_STRUCT
+#define TARGET_OPTION_INIT_STRUCT s390_option_init_struct
+
+struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;