Move tilegx, tilepro, and linux-generic from ports to libc.

I've moved the TILE-Gx and TILEPro ports to the main sysdeps hierarchy,
along with the linux-generic ports infrastructure.  Beyond the README
update, the move was just

    git mv ports/sysdeps/tile sysdeps/tile
    git mv ports/sysdeps/unix/sysv/linux/tile \
      sysdeps/unix/sysv/linux/tile
    git mv ports/sysdeps/unix/sysv/linux/generic \
      sysdeps/unix/sysv/linux/generic

I updated the relevant ChangeLogs along the lines of the ARM move
in commit c6bfe5c4d75 and tested the 64-bit tilegx build to confirm that
there were no changes in "objdump -dr" output in the shared objects.

1 files changed, 449 insertions, 0 deletions

diff --git a/sysdeps/tile/wordcopy.c b/sysdeps/tile/wordcopy.c
new file mode 100644
index 0000000000..5ed0e949f6
--- /dev/null
+++ b/sysdeps/tile/wordcopy.c
@@ -0,0 +1,449 @@
+/* wordcopy.c -- subroutines for memory copy functions.  Tile version.
+   Copyright (C) 1991-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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/>.  */
+
+/* To optimize for tile, we make the following changes from the
+   default glibc version:
+   - Use the double align instruction instead of the MERGE macro.
+   - Since we don't have offset addressing mode, make sure the loads /
+     stores in the inner loop always have indices of 0.
+   - Use post-increment addresses in the inner loops, which yields
+     better scheduling.  */
+
+/* BE VERY CAREFUL IF YOU CHANGE THIS CODE...!  */
+
+#include <stddef.h>
+#include <memcopy.h>
+
+/* Provide the appropriate dblalign builtin to shift two registers
+   based on the alignment of a pointer held in a third register.  */
+#ifdef __tilegx__
+#define DBLALIGN __insn_dblalign
+#else
+#define DBLALIGN __insn_dword_align
+#endif
+
+/* _wordcopy_fwd_aligned -- Copy block beginning at SRCP to
+   block beginning at DSTP with LEN `op_t' words (not LEN bytes!).
+   Both SRCP and DSTP should be aligned for memory operations on `op_t's.  */
+
+void
+_wordcopy_fwd_aligned (dstp, srcp, len)
+     long int dstp;
+     long int srcp;
+     size_t len;
+{
+  op_t a0, a1;
+
+  switch (len % 8)
+    {
+    case 2:
+      a0 = ((op_t *) srcp)[0];
+      srcp += OPSIZ;
+      len += 6;
+      goto do1;
+    case 3:
+      a1 = ((op_t *) srcp)[0];
+      srcp += OPSIZ;
+      len += 5;
+      goto do2;
+    case 4:
+      a0 = ((op_t *) srcp)[0];
+      srcp += OPSIZ;
+      len += 4;
+      goto do3;
+    case 5:
+      a1 = ((op_t *) srcp)[0];
+      srcp += OPSIZ;
+      len += 3;
+      goto do4;
+    case 6:
+      a0 = ((op_t *) srcp)[0];
+      srcp += OPSIZ;
+      len += 2;
+      goto do5;
+    case 7:
+      a1 = ((op_t *) srcp)[0];
+      srcp += OPSIZ;
+      len += 1;
+      goto do6;
+
+    case 0:
+      if (OP_T_THRES <= 3 * OPSIZ && len == 0)
+	return;
+      a0 = ((op_t *) srcp)[0];
+      srcp += OPSIZ;
+      goto do7;
+    case 1:
+      a1 = ((op_t *) srcp)[0];
+      srcp += OPSIZ;
+      len -= 1;
+      if (OP_T_THRES <= 3 * OPSIZ && len == 0)
+	goto do0;
+      goto do8;			/* No-op.  */
+    }
+
+  do
+    {
+    do8:
+      a0 = ((op_t *) srcp)[0];
+      ((op_t *) dstp)[0] = a1;
+      srcp += OPSIZ;
+      dstp += OPSIZ;
+    do7:
+      a1 = ((op_t *) srcp)[0];
+      ((op_t *) dstp)[0] = a0;
+      srcp += OPSIZ;
+      dstp += OPSIZ;
+    do6:
+      a0 = ((op_t *) srcp)[0];
+      ((op_t *) dstp)[0] = a1;
+      srcp += OPSIZ;
+      dstp += OPSIZ;
+    do5:
+      a1 = ((op_t *) srcp)[0];
+      ((op_t *) dstp)[0] = a0;
+      srcp += OPSIZ;
+      dstp += OPSIZ;
+    do4:
+      a0 = ((op_t *) srcp)[0];
+      ((op_t *) dstp)[0] = a1;
+      srcp += OPSIZ;
+      dstp += OPSIZ;
+    do3:
+      a1 = ((op_t *) srcp)[0];
+      ((op_t *) dstp)[0] = a0;
+      srcp += OPSIZ;
+      dstp += OPSIZ;
+    do2:
+      a0 = ((op_t *) srcp)[0];
+      ((op_t *) dstp)[0] = a1;
+      srcp += OPSIZ;
+      dstp += OPSIZ;
+    do1:
+      a1 = ((op_t *) srcp)[0];
+      ((op_t *) dstp)[0] = a0;
+      srcp += OPSIZ;
+      dstp += OPSIZ;
+
+      len -= 8;
+    }
+  while (len != 0);
+
+  /* This is the right position for do0.  Please don't move
+     it into the loop.  */
+ do0:
+  ((op_t *) dstp)[0] = a1;
+}
+
+/* _wordcopy_fwd_dest_aligned -- Copy block beginning at SRCP to
+   block beginning at DSTP with LEN `op_t' words (not LEN bytes!).
+   DSTP should be aligned for memory operations on `op_t's, but SRCP must
+   *not* be aligned.  */
+
+void
+_wordcopy_fwd_dest_aligned (dstp, srcp, len)
+     long int dstp;
+     long int srcp;
+     size_t len;
+{
+  void * srci;
+  op_t a0, a1, a2, a3;
+
+  /* Save the initial source pointer so we know the number of bytes to
+     shift for merging two unaligned results.  */
+  srci = (void *) srcp;
+
+  /* Make SRCP aligned by rounding it down to the beginning of the `op_t'
+     it points in the middle of.  */
+  srcp &= -OPSIZ;
+
+  switch (len % 4)
+    {
+    case 2:
+      a1 = ((op_t *) srcp)[0];
+      a2 = ((op_t *) srcp)[1];
+      len += 2;
+      srcp += 2 * OPSIZ;
+      goto do1;
+    case 3:
+      a0 = ((op_t *) srcp)[0];
+      a1 = ((op_t *) srcp)[1];
+      len += 1;
+      srcp += 2 * OPSIZ;
+      goto do2;
+    case 0:
+      if (OP_T_THRES <= 3 * OPSIZ && len == 0)
+	return;
+      a3 = ((op_t *) srcp)[0];
+      a0 = ((op_t *) srcp)[1];
+      len += 0;
+      srcp += 2 * OPSIZ;
+      goto do3;
+    case 1:
+      a2 = ((op_t *) srcp)[0];
+      a3 = ((op_t *) srcp)[1];
+      srcp += 2 * OPSIZ;
+      len -= 1;
+      if (OP_T_THRES <= 3 * OPSIZ && len == 0)
+	goto do0;
+      goto do4;			/* No-op.  */
+    }
+
+  do
+    {
+    do4:
+      a0 = ((op_t *) srcp)[0];
+      a2 = DBLALIGN (a2, a3, srci);
+      ((op_t *) dstp)[0] = a2;
+      srcp += OPSIZ;
+      dstp += OPSIZ;
+    do3:
+      a1 = ((op_t *) srcp)[0];
+      a3 = DBLALIGN (a3, a0, srci);
+      ((op_t *) dstp)[0] = a3;
+      srcp += OPSIZ;
+      dstp += OPSIZ;
+    do2:
+      a2 = ((op_t *) srcp)[0];
+      a0 = DBLALIGN (a0, a1, srci);
+      ((op_t *) dstp)[0] = a0;
+      srcp += OPSIZ;
+      dstp += OPSIZ;
+    do1:
+      a3 = ((op_t *) srcp)[0];
+      a1 = DBLALIGN (a1, a2, srci);
+      ((op_t *) dstp)[0] = a1;
+      srcp += OPSIZ;
+      dstp += OPSIZ;
+      len -= 4;
+    }
+  while (len != 0);
+
+  /* This is the right position for do0.  Please don't move
+     it into the loop.  */
+ do0:
+  ((op_t *) dstp)[0] = DBLALIGN (a2, a3, srci);
+}
+
+/* _wordcopy_bwd_aligned -- Copy block finishing right before
+   SRCP to block finishing right before DSTP with LEN `op_t' words
+   (not LEN bytes!).  Both SRCP and DSTP should be aligned for memory
+   operations on `op_t's.  */
+
+void
+_wordcopy_bwd_aligned (dstp, srcp, len)
+     long int dstp;
+     long int srcp;
+     size_t len;
+{
+  op_t a0, a1;
+  long int srcp1;
+
+  srcp1 = srcp - 1 * OPSIZ;
+  srcp -= 2 * OPSIZ;
+  dstp -= 1 * OPSIZ;
+
+  switch (len % 8)
+    {
+    case 2:
+      a0 = ((op_t *) srcp1)[0];
+      len += 6;
+      goto do1;
+    case 3:
+      a1 = ((op_t *) srcp1)[0];
+      len += 5;
+      goto do2;
+    case 4:
+      a0 = ((op_t *) srcp1)[0];
+      len += 4;
+      goto do3;
+    case 5:
+      a1 = ((op_t *) srcp1)[0];
+      len += 3;
+      goto do4;
+    case 6:
+      a0 = ((op_t *) srcp1)[0];
+      len += 2;
+      goto do5;
+    case 7:
+      a1 = ((op_t *) srcp1)[0];
+      len += 1;
+      goto do6;
+
+    case 0:
+      if (OP_T_THRES <= 3 * OPSIZ && len == 0)
+	return;
+      a0 = ((op_t *) srcp1)[0];
+      goto do7;
+    case 1:
+      a1 = ((op_t *) srcp1)[0];
+      len -= 1;
+      if (OP_T_THRES <= 3 * OPSIZ && len == 0)
+	goto do0;
+      goto do8;			/* No-op.  */
+    }
+
+  do
+    {
+    do8:
+      a0 = ((op_t *) srcp)[0];
+      ((op_t *) dstp)[0] = a1;
+      srcp -= OPSIZ;
+      dstp -= OPSIZ;
+    do7:
+      a1 = ((op_t *) srcp)[0];
+      ((op_t *) dstp)[0] = a0;
+      srcp -= OPSIZ;
+      dstp -= OPSIZ;
+    do6:
+      a0 = ((op_t *) srcp)[0];
+      ((op_t *) dstp)[0] = a1;
+      srcp -= OPSIZ;
+      dstp -= OPSIZ;
+    do5:
+      a1 = ((op_t *) srcp)[0];
+      ((op_t *) dstp)[0] = a0;
+      srcp -= OPSIZ;
+      dstp -= OPSIZ;
+    do4:
+      a0 = ((op_t *) srcp)[0];
+      ((op_t *) dstp)[0] = a1;
+      srcp -= OPSIZ;
+      dstp -= OPSIZ;
+    do3:
+      a1 = ((op_t *) srcp)[0];
+      ((op_t *) dstp)[0] = a0;
+      srcp -= OPSIZ;
+      dstp -= OPSIZ;
+    do2:
+      a0 = ((op_t *) srcp)[0];
+      ((op_t *) dstp)[0] = a1;
+      srcp -= OPSIZ;
+      dstp -= OPSIZ;
+    do1:
+      a1 = ((op_t *) srcp)[0];
+      ((op_t *) dstp)[0] = a0;
+      srcp -= OPSIZ;
+      dstp -= OPSIZ;
+
+      len -= 8;
+    }
+  while (len != 0);
+
+  /* This is the right position for do0.  Please don't move
+     it into the loop.  */
+ do0:
+  ((op_t *) dstp)[0] = a1;
+}
+
+/* _wordcopy_bwd_dest_aligned -- Copy block finishing right
+   before SRCP to block finishing right before DSTP with LEN `op_t'
+   words (not LEN bytes!).  DSTP should be aligned for memory
+   operations on `op_t', but SRCP must *not* be aligned.  */
+
+void
+_wordcopy_bwd_dest_aligned (dstp, srcp, len)
+     long int dstp;
+     long int srcp;
+     size_t len;
+{
+  void * srci;
+  op_t a0, a1, a2, a3;
+  op_t b0, b1, b2, b3;
+
+  /* Save the initial source pointer so we know the number of bytes to
+     shift for merging two unaligned results.  */
+  srci = (void *) srcp;
+
+  /* Make SRCP aligned by rounding it down to the beginning of the op_t
+     it points in the middle of.  */
+  srcp &= -OPSIZ;
+  srcp += OPSIZ;
+
+  switch (len % 4)
+    {
+    case 2:
+      srcp -= 3 * OPSIZ;
+      dstp -= 1 * OPSIZ;
+      b2 = ((op_t *) srcp)[2];
+      b1 = a1 = ((op_t *) srcp)[1];
+      len += 2;
+      goto do1;
+    case 3:
+      srcp -= 3 * OPSIZ;
+      dstp -= 1 * OPSIZ;
+      b3 = ((op_t *) srcp)[2];
+      b2 = a2 = ((op_t *) srcp)[1];
+      len += 1;
+      goto do2;
+    case 0:
+      if (OP_T_THRES <= 3 * OPSIZ && len == 0)
+	return;
+      srcp -= 3 * OPSIZ;
+      dstp -= 1 * OPSIZ;
+      b0 = ((op_t *) srcp)[2];
+      b3 = a3 = ((op_t *) srcp)[1];
+      goto do3;
+    case 1:
+      srcp -= 3 * OPSIZ;
+      dstp -= 1 * OPSIZ;
+      b1 = ((op_t *) srcp)[2];
+      b0 = a0 = ((op_t *) srcp)[1];
+      len -= 1;
+      if (OP_T_THRES <= 3 * OPSIZ && len == 0)
+	goto do0;
+      goto do4;			/* No-op.  */
+    }
+
+  do
+    {
+    do4:
+      b3 = a3 = ((op_t *) srcp)[0];
+      a0 = DBLALIGN (a0, b1, srci);
+      ((op_t *) dstp)[0] = a0;
+      srcp -= OPSIZ;
+      dstp -= OPSIZ;
+    do3:
+      b2 = a2 = ((op_t *) srcp)[0];
+      a3 = DBLALIGN (a3, b0, srci);
+      ((op_t *) dstp)[0] = a3;
+      srcp -= OPSIZ;
+      dstp -= OPSIZ;
+    do2:
+      b1 = a1 = ((op_t *) srcp)[0];
+      a2 = DBLALIGN (a2, b3, srci);
+      ((op_t *) dstp)[0] = a2;
+      srcp -= OPSIZ;
+      dstp -= OPSIZ;
+    do1:
+      b0 = a0 = ((op_t *) srcp)[0];
+      a1 = DBLALIGN (a1, b2, srci);
+      ((op_t *) dstp)[0] = a1;
+      srcp -= OPSIZ;
+      dstp -= OPSIZ;
+
+      len -= 4;
+    }
+  while (len != 0);
+
+  /* This is the right position for do0.  Please don't move
+     it into the loop.  */
+ do0:
+  a0 = DBLALIGN (a0, b1, srci);
+  ((op_t *) dstp)[0] = a0;
+}