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-rw-r--r--sysdeps/m68k/memcopy.h100
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diff --git a/sysdeps/m68k/memcopy.h b/sysdeps/m68k/memcopy.h
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+/* memcopy.h -- definitions for memory copy functions. Motorola 68020 version.
+ Copyright (C) 1991, 1997, 2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Torbjorn Granlund (tege@sics.se).
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdeps/generic/memcopy.h>
+
+#if defined(__mc68020__) || defined(mc68020)
+
+#undef OP_T_THRES
+#define OP_T_THRES 16
+
+/* WORD_COPY_FWD and WORD_COPY_BWD are not symmetric on the 68020,
+ because of its weird instruction overlap characteristics. */
+
+#undef WORD_COPY_FWD
+#define WORD_COPY_FWD(dst_bp, src_bp, nbytes_left, nbytes) \
+ do \
+ { \
+ size_t __nwords = (nbytes) / sizeof (op_t); \
+ size_t __nblocks = __nwords / 8 + 1; \
+ dst_bp -= (8 - __nwords % 8) * sizeof (op_t); \
+ src_bp -= (8 - __nwords % 8) * sizeof (op_t); \
+ switch (__nwords % 8) \
+ do \
+ { \
+ ((op_t *) dst_bp)[0] = ((op_t *) src_bp)[0]; \
+ case 7: \
+ ((op_t *) dst_bp)[1] = ((op_t *) src_bp)[1]; \
+ case 6: \
+ ((op_t *) dst_bp)[2] = ((op_t *) src_bp)[2]; \
+ case 5: \
+ ((op_t *) dst_bp)[3] = ((op_t *) src_bp)[3]; \
+ case 4: \
+ ((op_t *) dst_bp)[4] = ((op_t *) src_bp)[4]; \
+ case 3: \
+ ((op_t *) dst_bp)[5] = ((op_t *) src_bp)[5]; \
+ case 2: \
+ ((op_t *) dst_bp)[6] = ((op_t *) src_bp)[6]; \
+ case 1: \
+ ((op_t *) dst_bp)[7] = ((op_t *) src_bp)[7]; \
+ case 0: \
+ src_bp += 32; \
+ dst_bp += 32; \
+ __nblocks--; \
+ } \
+ while (__nblocks != 0); \
+ (nbytes_left) = (nbytes) % sizeof (op_t); \
+ } while (0)
+
+#undef WORD_COPY_BWD
+#define WORD_COPY_BWD(dst_ep, src_ep, nbytes_left, nbytes) \
+ do \
+ { \
+ size_t __nblocks = (nbytes) / 32 + 1; \
+ op_t *__dst_ep = (op_t *) (dst_ep); \
+ op_t *__src_ep = (op_t *) (src_ep); \
+ switch ((nbytes) / sizeof (op_t) % 8) \
+ do \
+ { \
+ *--__dst_ep = *--__src_ep; \
+ case 7: \
+ *--__dst_ep = *--__src_ep; \
+ case 6: \
+ *--__dst_ep = *--__src_ep; \
+ case 5: \
+ *--__dst_ep = *--__src_ep; \
+ case 4: \
+ *--__dst_ep = *--__src_ep; \
+ case 3: \
+ *--__dst_ep = *--__src_ep; \
+ case 2: \
+ *--__dst_ep = *--__src_ep; \
+ case 1: \
+ *--__dst_ep = *--__src_ep; \
+ case 0: \
+ __nblocks--; \
+ } \
+ while (__nblocks != 0); \
+ (nbytes_left) = (nbytes) % sizeof (op_t); \
+ (dst_ep) = (unsigned long) __dst_ep; \
+ (src_ep) = (unsigned long) __src_ep; \
+ } while (0)
+
+#endif