summaryrefslogtreecommitdiffstats
path: root/c/src/exec/score/cpu/m68k/memcpy.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--c/src/exec/score/cpu/m68k/memcpy.c87
1 files changed, 0 insertions, 87 deletions
diff --git a/c/src/exec/score/cpu/m68k/memcpy.c b/c/src/exec/score/cpu/m68k/memcpy.c
deleted file mode 100644
index 3948411f4b..0000000000
--- a/c/src/exec/score/cpu/m68k/memcpy.c
+++ /dev/null
@@ -1,87 +0,0 @@
-/*
- * C library memcpy routine
- *
- * This routine has code to optimize performance on the CPU32+
- * and another version for other 68k machines.
- *
- * It could be optimized more for machines with MOVE16 instructions.
- *
- * The routine is placed in this source directory to ensure that it
- * is picked up by all applications.
- *
- * W. Eric Norum
- * Saskatchewan Accelerator Laboratory
- * University of Saskatchewan
- * Saskatoon, Saskatchewan, CANADA
- * eric@skatter.usask.ca
- */
-
-#include <string.h>
-#include <rtems/score/m68k.h>
-
-#if defined(__mcpu32__)
-#define COPYSETUP(n) n--
-#define COPY(to,from,n,size) \
- asm volatile ("1:\n" \
- "\tmove." size " (%0)+,(%1)+\n" \
- "\tdbf %2,1b\n" \
- "\tsub.l #0x10000,%2\n" \
- "\tbpl.b 1b\n" : \
- "=a" (from), "=a" (to), "=d" (n) :\
- "0" (from), "1" (to), "2" (n) : \
- "cc", "memory")
-#else
-#define COPYSETUP(n)
-#define COPY(to,from,n,size) \
- asm volatile ("1:\n" \
- "\tmove." size " (%0)+,(%1)+\n" \
- "\tsubq.l #1,%2\n\tbne.b 1b\n" : \
- "=a" (from), "=a" (to), "=d" (n) :\
- "0" (from), "1" (to), "2" (n) : \
- "cc", "memory")
-#endif
-
-void *
-memcpy(void *s1, const void *s2, size_t n)
-{
- char *p1 = s1;
- const char *p2 = s2;
-
- if (n) {
- if (n < 16) {
- COPYSETUP (n);
- COPY (p1, p2, n, "b");
- }
- else {
- int nbyte;
- int nl;
- nbyte = (int)p1 & 0x3;
- if (nbyte) {
- nbyte = 4 - nbyte;
- n -= nbyte;
- COPYSETUP (nbyte);
- COPY (p1, p2, nbyte, "b");
- }
-#if (M68K_HAS_MISALIGNED == 0)
- /*
- * Take care of machines that can't
- * handle misaligned references.
- */
- if ((int)p2 & 0x1) {
- COPYSETUP (n);
- COPY (p1, p2, n, "b");
- return s1;
- }
-#endif
- nl = (unsigned int)n >> 2;
- COPYSETUP (nl);
- COPY (p1, p2, nl, "l");
- nbyte = (int)n & 0x3;
- if (nbyte) {
- COPYSETUP (nbyte);
- COPY (p1, p2, nbyte, "b");
- }
- }
- }
- return s1;
-}