Simplify tilegx sysdeps folder

With tilepro support removal we can now simplify internal tile support by
moving the directory structure to avoid the unnecessary directory levels
in tile/tilegx both on generic and linux folders.

Checked with a build for tilegx-linux-gnu and tilegx-linux-gnu-32 with
and without the patch, there is no difference in generated binary with
a dissassemble.

	* stdlib/bug-getcontext.c (do_test): Remove tilepro mention in
	comment.
	* sysdeps/tile/preconfigure: Remove tilegx folder.
	* sysdeps/tile/tilegx/Implies: Move definitions to ...
	* sysdeps/tile/Implies: ... here.
	* sysdeps/tile/tilegx/Makefile: Move rules to ...
	* sysdeps/tile/Makefile: ... here.
	* sysdeps/tile/tilegx/atomic-machine.h: Move definitions to ...
	* sysdeps/tile/atomic-machine.h: ... here.  Add include guards.
	* sysdeps/tile/tilegx/bits/wordsize.h: Move to ...
	* sysdeps/tile/bits/wordsize.h: ... here.
	* sysdeps/tile/tilegx/*: Move to ...
	* sysdeps/tile/*: ... here.
	* sysdeps/tile/tilegx/tilegx32/Implies: Move to ...
	* sysdeps/tile/tilegx32/Implies: ... here.
	* sysdeps/tile/tilegx/tilegx64/Implies: Move to ...
	* sysdeps/tile/tilegx64/Implies: ... here.
	* sysdeps/unix/sysv/linux/tile/tilegx/Makefile: Move definitions
	to ...
	* sysdeps/unix/sysv/linux/tile/Makefile: ... here.
	* sysdeps/unix/sysv/linux/tile/tilegx/*: Move to ...
	* sysdeps/unix/sysv/linux/tile/*: ... here.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/*: Move to ...
	* sysdeps/unix/sysv/linux/tile/tilegx32/*: ... here.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/*: Move to ...
	* sysdeps/unix/sysv/linux/tile/tilegx64/*: ... here.

sysdeps/tile/Implies

@@ -1,3 +1,4 @@
 ieee754/soft-fp
+ieee754/dbl-64/wordsize-64
 ieee754/dbl-64
 ieee754/flt-32

sysdeps/tile/Makefile

@@ -1,3 +1,39 @@
+include $(common-objpfx)cflags-mcmodel-large.mk
+
+# Check for gcc to support the command-line switch, and for
+# binutils to support the hwN_plt() assembly operators and relocations.
+$(common-objpfx)cflags-mcmodel-large.mk: $(common-objpfx)config.make
+	mcmodel=no; \
+	(echo 'int main() { return getuid(); }' | \
+	 $(CC) -o /dev/null -xc - -mcmodel=large -fpic) && mcmodel=yes; \
+	echo "cflags-mcmodel-large = $$mcmodel" > $@
+
+ifeq (yes,$(cflags-mcmodel-large))
+
+ifeq ($(subdir),csu)
+# elf-init.c is in libc_nonshared.o (the end of the shared object) but
+# must reach the _init symbol at the very start of the shared object.
+CFLAGS-elf-init.c += -mcmodel=large
+
+# __gmon_start__ is at the very start of the shared object when linked
+# with profiling, but calls to libc.so via the PLT at the very end.
+CFLAGS-gmon-start.c += -mcmodel=large
+endif
+
+else
+
+# Don't try to compile assembly code with hwN_plt() directives if the
+# toolchain doesn't support -mcmodel=large.
+ifeq ($(subdir),csu)
+CPPFLAGS-start.S += -DNO_PLT_PCREL
+CPPFLAGS-crti.S += -DNO_PLT_PCREL
+endif
+ifeq ($(subdir),nptl)
+CPPFLAGS-pt-crti.S += -DNO_PLT_PCREL
+endif
+
+endif
+
 # We don't support long doubles as a distinct type.  We don't need to set
 # this variable; it's here mostly for documentational purposes.
 

sysdeps/tile/atomic-machine.h

@@ -16,20 +16,12 @@
    License along with the GNU C Library.  If not, see
    <http://www.gnu.org/licenses/>.  */
 
-/* The sub-architecture headers provide definitions for these macros
-   that work for "int" and "long" size values only:
-
-   atomic_compare_and_exchange_val_acq()
-   atomic_exchange_acq()
-   atomic_exchange_and_add()
-   atomic_and_val()
-   atomic_or_val()
-   atomic_decrement_if_positive() [tilegx only]
-
-   Here we provide generic definitions true for all Tilera chips.  */
+#ifndef _ATOMIC_MACHINE_H
+#define _ATOMIC_MACHINE_H       1
 
 #include <stdint.h>
 #include <features.h>
+#include <arch/spr_def.h>
 
 typedef int32_t atomic32_t;
 typedef uint32_t uatomic32_t;
@@ -46,6 +38,41 @@ typedef uintptr_t uatomicptr_t;
 typedef intmax_t atomic_max_t;
 typedef uintmax_t uatomic_max_t;
 
+#ifdef _LP64
+# define __HAVE_64B_ATOMICS 1
+#else
+/* tilegx32 does have 64-bit atomics, but assumptions in the semaphore
+   code mean that unaligned 64-bit atomics will be used if this symbol
+   is true, and unaligned atomics are not supported on tile.  */
+# define __HAVE_64B_ATOMICS 0
+#endif
+
+#define USE_ATOMIC_COMPILER_BUILTINS 0
+#define ATOMIC_EXCHANGE_USES_CAS 0
+
+/* Pick appropriate 8- or 4-byte instruction. */
+#define __atomic_update(mem, v, op)                                     \
+  ((__typeof (*(mem))) (__typeof (*(mem) - *(mem)))                     \
+   ((sizeof (*(mem)) == 8) ?                                            \
+    __insn_##op ((void *) (mem), (int64_t) (__typeof((v) - (v))) (v)) : \
+    (sizeof (*(mem)) == 4) ?                                            \
+    __insn_##op##4 ((void *) (mem), (int32_t) (__typeof ((v) - (v))) (v)) : \
+    __atomic_error_bad_argument_size()))
+
+#define atomic_compare_and_exchange_val_acq(mem, n, o)                  \
+  ({ __insn_mtspr (SPR_CMPEXCH_VALUE, (int64_t) (__typeof ((o) - (o))) (o)); \
+     __atomic_update (mem, n, cmpexch); })
+#define atomic_exchange_acq(mem, newvalue) \
+  __atomic_update (mem, newvalue, exch)
+#define atomic_exchange_and_add(mem, value) \
+  __atomic_update (mem, value, fetchadd)
+#define atomic_and_val(mem, mask) \
+  __atomic_update (mem, mask, fetchand)
+#define atomic_or_val(mem, mask) \
+  __atomic_update (mem, mask, fetchor)
+#define atomic_decrement_if_positive(mem) \
+  __atomic_update (mem, -1, fetchaddgez)
+
 /* Barrier macro. */
 #define atomic_full_barrier() __sync_synchronize()
 
@@ -79,3 +106,5 @@ typedef uintmax_t uatomic_max_t;
  */
 extern int __atomic_error_bad_argument_size(void)
   __attribute__ ((warning ("bad sizeof atomic argument")));
+
+#endif /* _ATOMIC_MACHINE_H  */

sysdeps/tile/preconfigure

@@ -3,8 +3,8 @@ case "$machine" in
     tilegx*)
 	base_machine=tile
 	if $CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null | grep -q __LP64__; then
-	    machine=tile/tilegx/tilegx64
+	    machine=tile/tilegx64
 	else
-	    machine=tile/tilegx/tilegx32
+	    machine=tile/tilegx32
 	fi ;;
 esac

sysdeps/tile/tilegx/Implies

@@ -1 +0,0 @@
-ieee754/dbl-64/wordsize-64

sysdeps/tile/tilegx/Makefile

@@ -1,35 +0,0 @@
-include $(common-objpfx)cflags-mcmodel-large.mk
-
-# Check for gcc to support the command-line switch, and for
-# binutils to support the hwN_plt() assembly operators and relocations.
-$(common-objpfx)cflags-mcmodel-large.mk: $(common-objpfx)config.make
-	mcmodel=no; \
-	(echo 'int main() { return getuid(); }' | \
-	 $(CC) -o /dev/null -xc - -mcmodel=large -fpic) && mcmodel=yes; \
-	echo "cflags-mcmodel-large = $$mcmodel" > $@
-
-ifeq (yes,$(cflags-mcmodel-large))
-
-ifeq ($(subdir),csu)
-# elf-init.c is in libc_nonshared.o (the end of the shared object) but
-# must reach the _init symbol at the very start of the shared object.
-CFLAGS-elf-init.c += -mcmodel=large
-
-# __gmon_start__ is at the very start of the shared object when linked
-# with profiling, but calls to libc.so via the PLT at the very end.
-CFLAGS-gmon-start.c += -mcmodel=large
-endif
-
-else
-
-# Don't try to compile assembly code with hwN_plt() directives if the
-# toolchain doesn't support -mcmodel=large.
-ifeq ($(subdir),csu)
-CPPFLAGS-start.S += -DNO_PLT_PCREL
-CPPFLAGS-crti.S += -DNO_PLT_PCREL
-endif
-ifeq ($(subdir),nptl)
-CPPFLAGS-pt-crti.S += -DNO_PLT_PCREL
-endif
-
-endif

sysdeps/tile/tilegx/atomic-machine.h

@@ -1,61 +0,0 @@
-/* Copyright (C) 2011-2017 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 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
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library.  If not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#ifndef _ATOMIC_MACHINE_H
-#define _ATOMIC_MACHINE_H	1
-
-#include <arch/spr_def.h>
-
-#ifdef _LP64
-# define __HAVE_64B_ATOMICS 1
-#else
-/* tilegx32 does have 64-bit atomics, but assumptions in the semaphore
-   code mean that unaligned 64-bit atomics will be used if this symbol
-   is true, and unaligned atomics are not supported on tile.  */
-# define __HAVE_64B_ATOMICS 0
-#endif
-
-#define USE_ATOMIC_COMPILER_BUILTINS 0
-#define ATOMIC_EXCHANGE_USES_CAS 0
-
-/* Pick appropriate 8- or 4-byte instruction. */
-#define __atomic_update(mem, v, op)                                     \
-  ((__typeof (*(mem))) (__typeof (*(mem) - *(mem)))                     \
-   ((sizeof (*(mem)) == 8) ?                                            \
-    __insn_##op ((void *) (mem), (int64_t) (__typeof((v) - (v))) (v)) : \
-    (sizeof (*(mem)) == 4) ?                                            \
-    __insn_##op##4 ((void *) (mem), (int32_t) (__typeof ((v) - (v))) (v)) : \
-    __atomic_error_bad_argument_size()))
-
-#define atomic_compare_and_exchange_val_acq(mem, n, o)                  \
-  ({ __insn_mtspr (SPR_CMPEXCH_VALUE, (int64_t) (__typeof ((o) - (o))) (o)); \
-     __atomic_update (mem, n, cmpexch); })
-#define atomic_exchange_acq(mem, newvalue) \
-  __atomic_update (mem, newvalue, exch)
-#define atomic_exchange_and_add(mem, value) \
-  __atomic_update (mem, value, fetchadd)
-#define atomic_and_val(mem, mask) \
-  __atomic_update (mem, mask, fetchand)
-#define atomic_or_val(mem, mask) \
-  __atomic_update (mem, mask, fetchor)
-#define atomic_decrement_if_positive(mem) \
-  __atomic_update (mem, -1, fetchaddgez)
-
-#include <sysdeps/tile/atomic-machine.h>
-
-#endif /* atomic-machine.h */

sysdeps/tile/tilegx32/Implies

@@ -1,3 +1,2 @@
-tile/tilegx
 tile
 wordsize-32

sysdeps/tile/tilegx64/Implies

@@ -1,3 +1,2 @@
-tile/tilegx
 tile
 wordsize-64

sysdeps/unix/sysv/linux/tile/Makefile

@@ -1,3 +1,8 @@
+# Provide biarch definitions.
+abi-variants := 64 32
+abi-64-condition := __WORDSIZE == 64
+abi-32-condition := __WORDSIZE == 32
+
 ifeq ($(subdir),misc)
 
 # <sys/reg.h> provides something like x86 compatibility.

sysdeps/unix/sysv/linux/tile/configure

@@ -4,7 +4,7 @@
 ldd_rewrite_script=$dir/ldd-rewrite.sed
 
 case $machine in
-tile/tilegx/tilegx32)
+tile/tilegx32)
   test -n "$libc_cv_slibdir" ||
 case "$prefix" in
 /usr | /usr/)

sysdeps/unix/sysv/linux/tile/configure.ac

@@ -4,7 +4,7 @@ GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
 ldd_rewrite_script=$dir/ldd-rewrite.sed
 
 case $machine in
-tile/tilegx/tilegx32)
+tile/tilegx32)
   LIBC_SLIBDIR_RTLDDIR([lib32], [lib32])
   ;;
 esac

sysdeps/unix/sysv/linux/tile/tilegx/Makefile

@@ -1,4 +0,0 @@
-# Provide biarch definitions.
-abi-variants := 64 32
-abi-64-condition := __WORDSIZE == 64
-abi-32-condition := __WORDSIZE == 32

sysdeps/unix/sysv/linux/tile/tilegx32/Implies

@@ -1,4 +1,3 @@
-unix/sysv/linux/tile/tilegx
 unix/sysv/linux/tile
 unix/sysv/linux/generic/wordsize-32
 unix/sysv/linux/generic

sysdeps/unix/sysv/linux/tile/tilegx64/Implies

@@ -1,4 +1,3 @@
-unix/sysv/linux/tile/tilegx
 unix/sysv/linux/tile
 unix/sysv/linux/generic
 unix/sysv/linux/wordsize-64