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-rw-r--r--sysdeps/tile/memcmp.c357
1 files changed, 0 insertions, 357 deletions
diff --git a/sysdeps/tile/memcmp.c b/sysdeps/tile/memcmp.c
deleted file mode 100644
index 3246fb1159..0000000000
--- a/sysdeps/tile/memcmp.c
+++ /dev/null
@@ -1,357 +0,0 @@
-/* Copyright (C) 1991-2016 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/>. */
-
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#undef __ptr_t
-#define __ptr_t void *
-
-#if defined HAVE_STRING_H || defined _LIBC
-# include <string.h>
-#endif
-
-#undef memcmp
-
-#ifndef MEMCMP
-# define MEMCMP memcmp
-#endif
-
-#ifdef _LIBC
-
-# include <memcopy.h>
-# include <endian.h>
-
-# if __BYTE_ORDER == __BIG_ENDIAN
-# define WORDS_BIGENDIAN
-# endif
-
-#else /* Not in the GNU C library. */
-
-# include <sys/types.h>
-
-/* Type to use for aligned memory operations.
- This should normally be the biggest type supported by a single load
- and store. Must be an unsigned type. */
-# define op_t unsigned long int
-# define OPSIZ (sizeof(op_t))
-
-/* Threshold value for when to enter the unrolled loops. */
-# define OP_T_THRES 16
-
-/* Type to use for unaligned operations. */
-typedef unsigned char byte;
-
-#endif /* In the GNU C library. */
-
-/* Provide the appropriate builtins to shift two registers based on
- the alignment of a pointer held in a third register, and to reverse
- the bytes in a word. */
-#ifdef __tilegx__
-#define DBLALIGN __insn_dblalign
-#define REVBYTES __insn_revbytes
-#else
-#define DBLALIGN __insn_dword_align
-#define REVBYTES __insn_bytex
-#endif
-
-#ifdef WORDS_BIGENDIAN
-# define CMP_LT_OR_GT(a, b) ((a) > (b) ? 1 : -1)
-#else
-# define CMP_LT_OR_GT(a, b) (REVBYTES(a) > REVBYTES(b) ? 1 : -1)
-#endif
-
-/* BE VERY CAREFUL IF YOU CHANGE THIS CODE! */
-
-/* The strategy of this memcmp is:
-
- 1. Compare bytes until one of the block pointers is aligned.
-
- 2. Compare using memcmp_common_alignment or
- memcmp_not_common_alignment, regarding the alignment of the other
- block after the initial byte operations. The maximum number of
- full words (of type op_t) are compared in this way.
-
- 3. Compare the few remaining bytes. */
-
-static int memcmp_common_alignment (long, long, size_t) __THROW;
-
-/* memcmp_common_alignment -- Compare blocks at SRCP1 and SRCP2 with LEN `op_t'
- objects (not LEN bytes!). Both SRCP1 and SRCP2 should be aligned for
- memory operations on `op_t's. */
-static int
-memcmp_common_alignment (long int srcp1, long int srcp2, size_t len)
-{
- op_t a0, a1;
- op_t b0, b1;
-
- switch (len % 4)
- {
- default: /* Avoid warning about uninitialized local variables. */
- case 2:
- a0 = ((op_t *) srcp1)[0];
- b0 = ((op_t *) srcp2)[0];
- srcp1 += OPSIZ;
- srcp2 += OPSIZ;
- len += 2;
- goto do1;
- case 3:
- a1 = ((op_t *) srcp1)[0];
- b1 = ((op_t *) srcp2)[0];
- srcp1 += OPSIZ;
- srcp2 += OPSIZ;
- len += 1;
- goto do2;
- case 0:
- if (OP_T_THRES <= 3 * OPSIZ && len == 0)
- return 0;
- a0 = ((op_t *) srcp1)[0];
- b0 = ((op_t *) srcp2)[0];
- srcp1 += OPSIZ;
- srcp2 += OPSIZ;
- goto do3;
- case 1:
- a1 = ((op_t *) srcp1)[0];
- b1 = ((op_t *) srcp2)[0];
- srcp1 += OPSIZ;
- srcp2 += OPSIZ;
- len -= 1;
- if (OP_T_THRES <= 3 * OPSIZ && len == 0)
- goto do0;
- /* Fall through. */
- }
-
- do
- {
- a0 = ((op_t *) srcp1)[0];
- b0 = ((op_t *) srcp2)[0];
- srcp1 += OPSIZ;
- srcp2 += OPSIZ;
- if (__glibc_likely (a1 != b1))
- return CMP_LT_OR_GT (a1, b1);
-
- do3:
- a1 = ((op_t *) srcp1)[0];
- b1 = ((op_t *) srcp2)[0];
- srcp1 += OPSIZ;
- srcp2 += OPSIZ;
- if (__glibc_likely (a0 != b0))
- return CMP_LT_OR_GT (a0, b0);
-
- do2:
- a0 = ((op_t *) srcp1)[0];
- b0 = ((op_t *) srcp2)[0];
- srcp1 += OPSIZ;
- srcp2 += OPSIZ;
- if (__glibc_likely (a1 != b1))
- return CMP_LT_OR_GT (a1, b1);
-
- do1:
- a1 = ((op_t *) srcp1)[0];
- b1 = ((op_t *) srcp2)[0];
- srcp1 += OPSIZ;
- srcp2 += OPSIZ;
- if (__glibc_likely (a0 != b0))
- return CMP_LT_OR_GT (a0, b0);
-
- len -= 4;
- }
- while (len != 0);
-
- /* This is the right position for do0. Please don't move
- it into the loop. */
- do0:
- if (__glibc_likely (a1 != b1))
- return CMP_LT_OR_GT (a1, b1);
- return 0;
-}
-
-static int memcmp_not_common_alignment (long, long, size_t) __THROW;
-
-/* memcmp_not_common_alignment -- Compare blocks at SRCP1 and SRCP2 with LEN
- `op_t' objects (not LEN bytes!). SRCP2 should be aligned for memory
- operations on `op_t', but SRCP1 *should be unaligned*. */
-static int
-memcmp_not_common_alignment (long int srcp1, long int srcp2, size_t len)
-{
- void * srcp1i;
- op_t a0, a1, a2, a3;
- op_t b0, b1, b2, b3;
- op_t x;
-
- /* Calculate how to shift a word read at the memory operation
- aligned srcp1 to make it aligned for comparison. */
-
- srcp1i = (void *) srcp1;
-
- /* Make SRCP1 aligned by rounding it down to the beginning of the `op_t'
- it points in the middle of. */
- srcp1 &= -OPSIZ;
-
- switch (len % 4)
- {
- default: /* Avoid warning about uninitialized local variables. */
- case 2:
- a1 = ((op_t *) srcp1)[0];
- a2 = ((op_t *) srcp1)[1];
- b2 = ((op_t *) srcp2)[0];
- srcp1 += 2 * OPSIZ;
- srcp2 += 1 * OPSIZ;
- len += 2;
- goto do1;
- case 3:
- a0 = ((op_t *) srcp1)[0];
- a1 = ((op_t *) srcp1)[1];
- b1 = ((op_t *) srcp2)[0];
- srcp1 += 2 * OPSIZ;
- srcp2 += 1 * OPSIZ;
- len += 1;
- goto do2;
- case 0:
- if (OP_T_THRES <= 3 * OPSIZ && len == 0)
- return 0;
- a3 = ((op_t *) srcp1)[0];
- a0 = ((op_t *) srcp1)[1];
- b0 = ((op_t *) srcp2)[0];
- srcp1 += 2 * OPSIZ;
- srcp2 += 1 * OPSIZ;
- goto do3;
- case 1:
- a2 = ((op_t *) srcp1)[0];
- a3 = ((op_t *) srcp1)[1];
- b3 = ((op_t *) srcp2)[0];
- srcp1 += 2 * OPSIZ;
- srcp2 += 1 * OPSIZ;
- len -= 1;
- if (OP_T_THRES <= 3 * OPSIZ && len == 0)
- goto do0;
- /* Fall through. */
- }
-
- do
- {
- a0 = ((op_t *) srcp1)[0];
- b0 = ((op_t *) srcp2)[0];
- x = DBLALIGN (a2, a3, srcp1i);
- srcp1 += OPSIZ;
- srcp2 += OPSIZ;
- if (__glibc_likely (x != b3))
- return CMP_LT_OR_GT (x, b3);
-
- do3:
- a1 = ((op_t *) srcp1)[0];
- b1 = ((op_t *) srcp2)[0];
- x = DBLALIGN (a3, a0, srcp1i);
- srcp1 += OPSIZ;
- srcp2 += OPSIZ;
- if (__glibc_likely (x != b0))
- return CMP_LT_OR_GT (x, b0);
-
- do2:
- a2 = ((op_t *) srcp1)[0];
- b2 = ((op_t *) srcp2)[0];
- x = DBLALIGN (a0, a1, srcp1i);
- srcp1 += OPSIZ;
- srcp2 += OPSIZ;
- if (__glibc_likely (x != b1))
- return CMP_LT_OR_GT (x, b1);
-
- do1:
- a3 = ((op_t *) srcp1)[0];
- b3 = ((op_t *) srcp2)[0];
- x = DBLALIGN (a1, a2, srcp1i);
- srcp1 += OPSIZ;
- srcp2 += OPSIZ;
- if (__glibc_likely (x != b2))
- return CMP_LT_OR_GT (x, b2);
-
- len -= 4;
- }
- while (len != 0);
-
- /* This is the right position for do0. Please don't move
- it into the loop. */
- do0:
- x = DBLALIGN (a2, a3, srcp1i);
- if (__glibc_likely (x != b3))
- return CMP_LT_OR_GT (x, b3);
- return 0;
-}
-
-int
-MEMCMP (const __ptr_t s1, const __ptr_t s2, size_t len)
-{
- op_t a0;
- op_t b0;
- long int srcp1 = (long int) s1;
- long int srcp2 = (long int) s2;
- int res;
-
- if (len >= OP_T_THRES)
- {
- /* There are at least some bytes to compare. No need to test
- for LEN == 0 in this alignment loop. */
- while (srcp2 % OPSIZ != 0)
- {
- a0 = ((byte *) srcp1)[0];
- b0 = ((byte *) srcp2)[0];
- srcp1 += 1;
- srcp2 += 1;
- res = a0 - b0;
- if (__glibc_likely (res != 0))
- return res;
- len -= 1;
- }
-
- /* SRCP2 is now aligned for memory operations on `op_t'.
- SRCP1 alignment determines if we can do a simple,
- aligned compare or need to shuffle bits. */
-
- if (srcp1 % OPSIZ == 0)
- res = memcmp_common_alignment (srcp1, srcp2, len / OPSIZ);
- else
- res = memcmp_not_common_alignment (srcp1, srcp2, len / OPSIZ);
- if (res != 0)
- return res;
-
- /* Number of bytes remaining in the interval [0..OPSIZ-1]. */
- srcp1 += len & -OPSIZ;
- srcp2 += len & -OPSIZ;
- len %= OPSIZ;
- }
-
- /* There are just a few bytes to compare. Use byte memory operations. */
- while (len != 0)
- {
- a0 = ((byte *) srcp1)[0];
- b0 = ((byte *) srcp2)[0];
- srcp1 += 1;
- srcp2 += 1;
- res = a0 - b0;
- if (__glibc_likely (res != 0))
- return res;
- len -= 1;
- }
-
- return 0;
-}
-libc_hidden_builtin_def(memcmp)
-#ifdef weak_alias
-# undef bcmp
-weak_alias (memcmp, bcmp)
-#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-30 16:10:02 +0000