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2007-06-04 Joel Sherrill <joel.sherrill@OARcorp.com>

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* Makefile.am: Now use the m68k memcpy and memset recently added to
	newlib instead of our own.
	* shared/misc/memcpy.c: Removed.
This commit is contained in:
Joel Sherrill
2007-06-04 17:52:20 +00:00
parent 967c8974c3
commit b37fb8dc50
3 changed files with 7 additions and 94 deletions
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6
c/src/lib/libcpu/m68k/ChangeLog
View File

@@ -1,3 +1,9 @@
2007-06-04 Joel Sherrill <joel.sherrill@OARcorp.com>
* Makefile.am: Now use the m68k memcpy and memset recently added to
newlib instead of our own.
* shared/misc/memcpy.c: Removed.
2007-03-12 Joel Sherrill <joel@OARcorp.com>
* mcf5272/clock/ckinit.c, mcf5272/include/mcf5272.h,

2
c/src/lib/libcpu/m68k/Makefile.am
View File

@@ -32,7 +32,7 @@ M68K_CPPFLAGS = -Dmcf5272
endif
noinst_PROGRAMS += shared/misc.rel
shared_misc_rel_SOURCES = shared/misc/memcpy.c shared/misc/m68kidle.c shared/misc/memProbe.c
shared_misc_rel_SOURCES = shared/misc/m68kidle.c shared/misc/memProbe.c
shared_misc_rel_CPPFLAGS = $(AM_CPPFLAGS) $(M68K_CPPFLAGS)
shared_misc_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
endif

93
c/src/lib/libcpu/m68k/shared/misc/memcpy.c
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@@ -1,93 +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
/* gcc doesn't know that cpu32+ is better than cpu32 :( */
#if defined(__mcpu32p__)
#undef M68k_HAS_MISALIGNED
#define M68k_HAS_MISALIGNED 1
#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;
}