Commit of nios2 port to trunk:

contrib/
2013-12-31  Chung-Lin Tang  <cltang@codesourcery.com>

	* config-list.mk: Add nios2-elf, nios2-linux-gnu. Corrected
	ordering of some configs.

gcc/
2013-12-31  Chung-Lin Tang  <cltang@codesourcery.com>
	    Sandra Loosemore  <sandra@codesourcery.com>
	    Based on patches from Altera Corporation

	* config.gcc (nios2-*-*): Add nios2 config targets.
	* configure.ac (TLS_SECTION_ASM_FLAG): Add nios2 case.
	("$cpu_type"): Add nios2 as new cpu type.
	* configure: Regenerate.
	* config/nios2/nios2.c: New file.
	* config/nios2/nios2.h: New file.
	* config/nios2/nios2-opts.h: New file.
	* config/nios2/nios2-protos.h: New file.
	* config/nios2/elf.h: New file.
	* config/nios2/elf.opt: New file.
	* config/nios2/linux.h: New file.
	* config/nios2/nios2.opt: New file.
	* config/nios2/nios2.md: New file.
	* config/nios2/predicates.md: New file.
	* config/nios2/constraints.md: New file.
	* config/nios2/t-nios2: New file.
	* common/config/nios2/nios2-common.c: New file.
	* doc/invoke.texi (Nios II options): Document Nios II specific
	options.
	* doc/md.texi (Nios II family): Document Nios II specific
	constraints.
	* doc/extend.texi (Function Specific Option Pragmas): Document
	Nios II supported target pragma functionality.

gcc/testsuite/
2013-12-31  Sandra Loosemore  <sandra@codesourcery.com>
	    Chung-Lin Tang  <cltang@codesourcery.com>
	    Based on patches from Altera Corporation

	* gcc.dg/stack-usage-1.c (SIZE): Define case for __nios2__.
	* gcc.dg/20040813-1.c: Skip for nios2-*-*.
	* gcc.dg/20020312-2.c: Add __nios2__ case.
	* g++.dg/other/PR23205.C: Skip for nios2-*-*.
	* g++.dg/other/pr23205-2.C: Skip for nios2-*-*.
	* g++.dg/cpp0x/constexpr-rom.C: Skip for nios2-*-*.
	* g++.dg/cpp0x/alias-decl-debug-0.C: Skip for nios2-*-*.
	* g++.old-deja/g++.jason/thunk3.C: Skip for nios2-*-*.
	* lib/target-supports.exp (check_profiling_available): Check for
	nios2-*-elf.
	* gcc.c-torture/execute/pr47237.x:: Skip for nios2-*-*.
	* gcc.c-torture/execute/20101011-1.c: Skip for nios2-*-*.
	* gcc.c-torture/execute/builtins/lib/chk.c (memset): Place
	char-based memset loop before inline check, to prevent
	problems when called to initialize .bss. Update comments.
	* gcc.target/nios2/nios2.exp: New DejaGNU file.
	* gcc.target/nios2/nios2-custom-1.c: New test.
	* gcc.target/nios2/nios2-trap-insn.c: New test.
	* gcc.target/nios2/nios2-builtin-custom.c: New test.
	* gcc.target/nios2/nios2-builtin-io.c: New test.
	* gcc.target/nios2/nios2-stack-check-1.c: New test.
	* gcc.target/nios2/nios2-stack-check-2.c: New test.
	* gcc.target/nios2/nios2-rdctl.c: New test.
	* gcc.target/nios2/nios2-wrctl.c: New test.
	* gcc.target/nios2/nios2-wrctl-zero.c: New test.
	* gcc.target/nios2/nios2-wrctl-not-zero.c: New test.
	* gcc.target/nios2/nios2-rdwrctl-1.c: New test.
	* gcc.target/nios2/nios2-reg-constraints.c: New test.
	* gcc.target/nios2/nios2-ashlsi3-one_shift.c: New test.
	* gcc.target/nios2/nios2-mul-options-1.c: New test.
	* gcc.target/nios2/nios2-mul-options-2.c: New test.
	* gcc.target/nios2/nios2-mul-options-3.c: New test.
	* gcc.target/nios2/nios2-mul-options-4.c: New test.
	* gcc.target/nios2/nios2-nor.c: New test.
	* gcc.target/nios2/nios2-stxio.c: New test.
	* gcc.target/nios2/custom-fp-1.c: New test.
	* gcc.target/nios2/custom-fp-2.c: New test.
	* gcc.target/nios2/custom-fp-3.c: New test.
	* gcc.target/nios2/custom-fp-4.c: New test.
	* gcc.target/nios2/custom-fp-5.c: New test.
	* gcc.target/nios2/custom-fp-6.c: New test.
	* gcc.target/nios2/custom-fp-7.c: New test.
	* gcc.target/nios2/custom-fp-8.c: New test.
	* gcc.target/nios2/custom-fp-cmp-1.c: New test.
	* gcc.target/nios2/custom-fp-conversion.c: New test.
	* gcc.target/nios2/custom-fp-double.c: New test.
	* gcc.target/nios2/custom-fp-float.c: New test.
	* gcc.target/nios2/nios2-int-types.c: New test.
	* gcc.target/nios2/nios2-cache-1.c: New test.
	* gcc.target/nios2/nios2-cache-2.c: New test.

libgcc/
2013-12-31  Sandra Loosemore  <sandra@codesourcery.com>
	    Chung-Lin Tang  <cltang@codesourcery.com>
	    Based on patches from Altera Corporation

	* config.host (nios2-*-*,nios2-*-linux*): Add nios2 host cases.
	* config/nios2/lib2-nios2.h: New file.
	* config/nios2/lib2-divmod-hi.c: New file.
	* config/nios2/linux-unwind.h: New file.
	* config/nios2/lib2-divmod.c: New file.
	* config/nios2/linux-atomic.c: New file.
	* config/nios2/t-nios2: New file.
	* config/nios2/crti.asm: New file.
	* config/nios2/t-linux: New file.
	* config/nios2/lib2-divtable.c: New file.
	* config/nios2/lib2-mul.c: New file.
	* config/nios2/tramp.c: New file.
	* config/nios2/crtn.asm: New file.

From-SVN: r206256

1 files changed, 286 insertions, 0 deletions

diff --git a/libgcc/config/nios2/linux-atomic.c b/libgcc/config/nios2/linux-atomic.c
new file mode 100644
index 0000000..1fc91dd
--- /dev/null
+++ b/libgcc/config/nios2/linux-atomic.c
@@ -0,0 +1,286 @@
+/* Linux-specific atomic operations for Nios II Linux.
+   Copyright (C) 2008-2013 Free Software Foundation, Inc.
+
+This file 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.
+
+This file 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.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+#include <asm/unistd.h>
+#define EFAULT  14
+#define EBUSY   16
+#define ENOSYS  38
+
+/* We implement byte, short and int versions of each atomic operation
+   using the kernel helper defined below.  There is no support for
+   64-bit operations yet.  */
+
+/* Crash a userspace program with SIGSEV.  */
+#define ABORT_INSTRUCTION asm ("stw zero, 0(zero)")
+
+/* Kernel helper for compare-and-exchange a 32-bit value.  */
+static inline long
+__kernel_cmpxchg (int oldval, int newval, int *mem)
+{
+  register int r2 asm ("r2");
+  register int *r4 asm ("r4") = mem;
+  register int r5 asm ("r5") = oldval;
+  register int r6 asm ("r6") = newval;
+
+  /* Call the kernel provided fixed address cmpxchg helper routine.  */
+  asm volatile ("movi %0, %4\n\t"
+		"callr %0\n"
+		: "=r" (r2)
+		: "r" (r4), "r" (r5), "r" (r6), "I" (0x00001004)
+		: "ra", "memory");
+  return r2;
+}
+
+#define HIDDEN __attribute__ ((visibility ("hidden")))
+
+#ifdef __nios2_little_endian__
+#define INVERT_MASK_1 0
+#define INVERT_MASK_2 0
+#else
+#define INVERT_MASK_1 24
+#define INVERT_MASK_2 16
+#endif
+
+#define MASK_1 0xffu
+#define MASK_2 0xffffu
+
+#define FETCH_AND_OP_WORD(OP, PFX_OP, INF_OP)				\
+  int HIDDEN								\
+  __sync_fetch_and_##OP##_4 (int *ptr, int val)				\
+  {									\
+    int failure, tmp;							\
+									\
+    do {								\
+      tmp = *ptr;							\
+      failure = __kernel_cmpxchg (tmp, PFX_OP (tmp INF_OP val), ptr);	\
+    } while (failure != 0);						\
+									\
+    return tmp;								\
+  }
+
+FETCH_AND_OP_WORD (add,   , +)
+FETCH_AND_OP_WORD (sub,   , -)
+FETCH_AND_OP_WORD (or,    , |)
+FETCH_AND_OP_WORD (and,   , &)
+FETCH_AND_OP_WORD (xor,   , ^)
+FETCH_AND_OP_WORD (nand, ~, &)
+
+#define NAME_oldval(OP, WIDTH) __sync_fetch_and_##OP##_##WIDTH
+#define NAME_newval(OP, WIDTH) __sync_##OP##_and_fetch_##WIDTH
+
+/* Implement both __sync_<op>_and_fetch and __sync_fetch_and_<op> for
+   subword-sized quantities.  */
+
+#define SUBWORD_SYNC_OP(OP, PFX_OP, INF_OP, TYPE, WIDTH, RETURN)	\
+  TYPE HIDDEN								\
+  NAME##_##RETURN (OP, WIDTH) (TYPE *ptr, TYPE val)			\
+  {									\
+    int *wordptr = (int *) ((unsigned long) ptr & ~3);			\
+    unsigned int mask, shift, oldval, newval;				\
+    int failure;							\
+									\
+    shift = (((unsigned long) ptr & 3) << 3) ^ INVERT_MASK_##WIDTH;	\
+    mask = MASK_##WIDTH << shift;					\
+									\
+    do {								\
+      oldval = *wordptr;						\
+      newval = ((PFX_OP (((oldval & mask) >> shift)			\
+			 INF_OP (unsigned int) val)) << shift) & mask;	\
+      newval |= oldval & ~mask;						\
+      failure = __kernel_cmpxchg (oldval, newval, wordptr);		\
+    } while (failure != 0);						\
+									\
+    return (RETURN & mask) >> shift;					\
+  }
+
+SUBWORD_SYNC_OP (add,   , +, unsigned short, 2, oldval)
+SUBWORD_SYNC_OP (sub,   , -, unsigned short, 2, oldval)
+SUBWORD_SYNC_OP (or,    , |, unsigned short, 2, oldval)
+SUBWORD_SYNC_OP (and,   , &, unsigned short, 2, oldval)
+SUBWORD_SYNC_OP (xor,   , ^, unsigned short, 2, oldval)
+SUBWORD_SYNC_OP (nand, ~, &, unsigned short, 2, oldval)
+
+SUBWORD_SYNC_OP (add,   , +, unsigned char, 1, oldval)
+SUBWORD_SYNC_OP (sub,   , -, unsigned char, 1, oldval)
+SUBWORD_SYNC_OP (or,    , |, unsigned char, 1, oldval)
+SUBWORD_SYNC_OP (and,   , &, unsigned char, 1, oldval)
+SUBWORD_SYNC_OP (xor,   , ^, unsigned char, 1, oldval)
+SUBWORD_SYNC_OP (nand, ~, &, unsigned char, 1, oldval)
+
+#define OP_AND_FETCH_WORD(OP, PFX_OP, INF_OP)				\
+  int HIDDEN								\
+  __sync_##OP##_and_fetch_4 (int *ptr, int val)				\
+  {									\
+    int tmp, failure;							\
+									\
+    do {								\
+      tmp = *ptr;							\
+      failure = __kernel_cmpxchg (tmp, PFX_OP (tmp INF_OP val), ptr);	\
+    } while (failure != 0);						\
+									\
+    return PFX_OP (tmp INF_OP val);					\
+  }
+
+OP_AND_FETCH_WORD (add,   , +)
+OP_AND_FETCH_WORD (sub,   , -)
+OP_AND_FETCH_WORD (or,    , |)
+OP_AND_FETCH_WORD (and,   , &)
+OP_AND_FETCH_WORD (xor,   , ^)
+OP_AND_FETCH_WORD (nand, ~, &)
+
+SUBWORD_SYNC_OP (add,   , +, unsigned short, 2, newval)
+SUBWORD_SYNC_OP (sub,   , -, unsigned short, 2, newval)
+SUBWORD_SYNC_OP (or,    , |, unsigned short, 2, newval)
+SUBWORD_SYNC_OP (and,   , &, unsigned short, 2, newval)
+SUBWORD_SYNC_OP (xor,   , ^, unsigned short, 2, newval)
+SUBWORD_SYNC_OP (nand, ~, &, unsigned short, 2, newval)
+
+SUBWORD_SYNC_OP (add,   , +, unsigned char, 1, newval)
+SUBWORD_SYNC_OP (sub,   , -, unsigned char, 1, newval)
+SUBWORD_SYNC_OP (or,    , |, unsigned char, 1, newval)
+SUBWORD_SYNC_OP (and,   , &, unsigned char, 1, newval)
+SUBWORD_SYNC_OP (xor,   , ^, unsigned char, 1, newval)
+SUBWORD_SYNC_OP (nand, ~, &, unsigned char, 1, newval)
+
+int HIDDEN
+__sync_val_compare_and_swap_4 (int *ptr, int oldval, int newval)
+{
+  int actual_oldval, fail;
+    
+  while (1)
+    {
+      actual_oldval = *ptr;
+
+      if (oldval != actual_oldval)
+	return actual_oldval;
+
+      fail = __kernel_cmpxchg (actual_oldval, newval, ptr);
+  
+      if (!fail)
+	return oldval;
+    }
+}
+
+#define SUBWORD_VAL_CAS(TYPE, WIDTH)					\
+  TYPE HIDDEN								\
+  __sync_val_compare_and_swap_##WIDTH (TYPE *ptr, TYPE oldval,		\
+				       TYPE newval)			\
+  {									\
+    int *wordptr = (int *)((unsigned long) ptr & ~3), fail;		\
+    unsigned int mask, shift, actual_oldval, actual_newval;		\
+									\
+    shift = (((unsigned long) ptr & 3) << 3) ^ INVERT_MASK_##WIDTH;	\
+    mask = MASK_##WIDTH << shift;					\
+									\
+    while (1)								\
+      {									\
+	actual_oldval = *wordptr;					\
+									\
+	if (((actual_oldval & mask) >> shift) != (unsigned int) oldval)	\
+          return (actual_oldval & mask) >> shift;			\
+									\
+	actual_newval = (actual_oldval & ~mask)				\
+			| (((unsigned int) newval << shift) & mask);	\
+									\
+	fail = __kernel_cmpxchg (actual_oldval, actual_newval,		\
+				 wordptr);				\
+									\
+	if (!fail)							\
+	  return oldval;						\
+      }									\
+  }
+
+SUBWORD_VAL_CAS (unsigned short, 2)
+SUBWORD_VAL_CAS (unsigned char,  1)
+
+typedef unsigned char bool;
+
+bool HIDDEN
+__sync_bool_compare_and_swap_4 (int *ptr, int oldval, int newval)
+{
+  int failure = __kernel_cmpxchg (oldval, newval, ptr);
+  return (failure == 0);
+}
+
+#define SUBWORD_BOOL_CAS(TYPE, WIDTH)					\
+  bool HIDDEN								\
+  __sync_bool_compare_and_swap_##WIDTH (TYPE *ptr, TYPE oldval,		\
+					TYPE newval)			\
+  {									\
+    TYPE actual_oldval							\
+      = __sync_val_compare_and_swap_##WIDTH (ptr, oldval, newval);	\
+    return (oldval == actual_oldval);					\
+  }
+
+SUBWORD_BOOL_CAS (unsigned short, 2)
+SUBWORD_BOOL_CAS (unsigned char,  1)
+
+int HIDDEN
+__sync_lock_test_and_set_4 (int *ptr, int val)
+{
+  int failure, oldval;
+
+  do {
+    oldval = *ptr;
+    failure = __kernel_cmpxchg (oldval, val, ptr);
+  } while (failure != 0);
+
+  return oldval;
+}
+
+#define SUBWORD_TEST_AND_SET(TYPE, WIDTH)				\
+  TYPE HIDDEN								\
+  __sync_lock_test_and_set_##WIDTH (TYPE *ptr, TYPE val)		\
+  {									\
+    int failure;							\
+    unsigned int oldval, newval, shift, mask;				\
+    int *wordptr = (int *) ((unsigned long) ptr & ~3);			\
+									\
+    shift = (((unsigned long) ptr & 3) << 3) ^ INVERT_MASK_##WIDTH;	\
+    mask = MASK_##WIDTH << shift;					\
+									\
+    do {								\
+      oldval = *wordptr;						\
+      newval = (oldval & ~mask)						\
+	       | (((unsigned int) val << shift) & mask);		\
+      failure = __kernel_cmpxchg (oldval, newval, wordptr);		\
+    } while (failure != 0);						\
+									\
+    return (oldval & mask) >> shift;					\
+  }
+
+SUBWORD_TEST_AND_SET (unsigned short, 2)
+SUBWORD_TEST_AND_SET (unsigned char,  1)
+
+#define SYNC_LOCK_RELEASE(TYPE, WIDTH)					\
+  void HIDDEN								\
+  __sync_lock_release_##WIDTH (TYPE *ptr)				\
+  {									\
+    /* All writes before this point must be seen before we release	\
+       the lock itself.  */						\
+    __builtin_sync ();							\
+    *ptr = 0;								\
+  }
+
+SYNC_LOCK_RELEASE (int,   4)
+SYNC_LOCK_RELEASE (short, 2)
+SYNC_LOCK_RELEASE (char,  1)