LoongArch Port: gcc build

2022-03-29  Chenghua Xu  <xuchenghua@loongson.cn>
	    Lulu Cheng  <chenglulu@loongson.cn>

gcc/ChangeLog:

	* common/config/loongarch/loongarch-common.cc: New file.
	* config/loongarch/genopts/genstr.sh: New file.
	* config/loongarch/genopts/loongarch-strings: New file.
	* config/loongarch/genopts/loongarch.opt.in: New file.
	* config/loongarch/loongarch-str.h: New file.
	* config/loongarch/gnu-user.h: New file.
	* config/loongarch/linux.h: New file.
	* config/loongarch/loongarch-cpu.cc: New file.
	* config/loongarch/loongarch-cpu.h: New file.
	* config/loongarch/loongarch-def.c: New file.
	* config/loongarch/loongarch-def.h: New file.
	* config/loongarch/loongarch-driver.cc: New file.
	* config/loongarch/loongarch-driver.h: New file.
	* config/loongarch/loongarch-opts.cc: New file.
	* config/loongarch/loongarch-opts.h: New file.
	* config/loongarch/loongarch.opt: New file.
	* config/loongarch/t-linux: New file.
	* config/loongarch/t-loongarch: New file.
	* config.gcc: Add LoongArch support.
	* configure.ac: Add LoongArch support.

contrib/ChangeLog:

	* gcc_update (files_and_dependencies): Add
	  config/loongarch/loongarch.opt and config/loongarch/loongarch-str.h.

1 files changed, 68 insertions, 0 deletions

diff --git a/gcc/config/loongarch/loongarch-driver.h b/gcc/config/loongarch/loongarch-driver.h
new file mode 100644
index 00000000000..2e4a7a9c870
--- /dev/null
+++ b/gcc/config/loongarch/loongarch-driver.h
@@ -0,0 +1,68 @@
+/* Subroutine headers for the gcc driver.
+   Copyright (C) 2021-2022 Free Software Foundation, Inc.
+   Contributed by Loongson Ltd.
+
+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/>.  */
+
+#ifndef LOONGARCH_DRIVER_H
+#define LOONGARCH_DRIVER_H
+
+#include "loongarch-str.h"
+
+extern const char*
+driver_set_m_flag (int argc, const char **argv);
+
+extern const char*
+driver_get_normalized_m_opts (int argc, const char **argv);
+
+#define EXTRA_SPEC_FUNCTIONS \
+  { "set_m_flag", driver_set_m_flag  }, \
+  { "get_normalized_m_opts", driver_get_normalized_m_opts  },
+
+/* Pre-process ABI-related options.  */
+#define LA_SET_PARM_SPEC(NAME) \
+  " %{m" OPTSTR_##NAME  "=*: %:set_m_flag(" OPTSTR_##NAME "=%*)}" \
+
+#define LA_SET_FLAG_SPEC(NAME) \
+  " %{m" OPTSTR_##NAME  ": %:set_m_flag(" OPTSTR_##NAME ")}" \
+
+#define DRIVER_HANDLE_MACHINE_OPTIONS			      \
+  " %{c|S|E|nostdlib: %:set_m_flag(no_link)}"		      \
+  " %{nostartfiles: %{nodefaultlibs: %:set_m_flag(no_link)}}" \
+  LA_SET_PARM_SPEC (ABI_BASE)				      \
+  LA_SET_PARM_SPEC (ARCH)				      \
+  LA_SET_PARM_SPEC (TUNE)				      \
+  LA_SET_PARM_SPEC (ISA_EXT_FPU)			      \
+  LA_SET_PARM_SPEC (CMODEL)				      \
+  LA_SET_FLAG_SPEC (SOFT_FLOAT)				      \
+  LA_SET_FLAG_SPEC (SINGLE_FLOAT)			      \
+  LA_SET_FLAG_SPEC (DOUBLE_FLOAT)			      \
+  " %:get_normalized_m_opts()"
+
+#define DRIVER_SELF_SPECS \
+  DRIVER_HANDLE_MACHINE_OPTIONS
+
+/* ABI spec strings.  */
+#define ABI_GRLEN_SPEC \
+  "%{mabi=lp64*:64}"   \
+
+#define ABI_SPEC \
+  "%{mabi=lp64d:lp64d}" \
+  "%{mabi=lp64f:lp64f}" \
+  "%{mabi=lp64s:lp64s}" \
+
+#endif /* LOONGARCH_DRIVER_H */