Commit 6cc0735d authored by David S. Miller's avatar David S. Miller
Browse files

[SPARC32]: Add __cmpdi2() libcall implementation ala. MIPS.



Device mapper generates calls to this with recent versions
of gcc.
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6c8f5b90
......@@ -8,6 +8,7 @@ lib-y := mul.o rem.o sdiv.o udiv.o umul.o urem.o ashrdi3.o memcpy.o memset.o \
strlen.o checksum.o blockops.o memscan.o memcmp.o strncmp.o \
strncpy_from_user.o divdi3.o udivdi3.o strlen_user.o \
copy_user.o locks.o atomic.o \
lshrdi3.o ashldi3.o rwsem.o muldi3.o bitext.o
lshrdi3.o ashldi3.o rwsem.o muldi3.o bitext.o \
cmpdi2.o
obj-y += iomap.o atomic32.o
#include <linux/module.h>
#include "libgcc.h"
word_type __cmpdi2(long long a, long long b)
{
const DWunion au = {
.ll = a
};
const DWunion bu = {
.ll = b
};
if (au.s.high < bu.s.high)
return 0;
else if (au.s.high > bu.s.high)
return 2;
if ((unsigned int) au.s.low < (unsigned int) bu.s.low)
return 0;
else if ((unsigned int) au.s.low > (unsigned int) bu.s.low)
return 2;
return 1;
}
EXPORT_SYMBOL(__cmpdi2);
#ifndef __ASM_LIBGCC_H
#define __ASM_LIBGCC_H
#include <asm/byteorder.h>
typedef int word_type __attribute__ ((mode (__word__)));
struct DWstruct {
int high, low;
};
typedef union
{
struct DWstruct s;
long long ll;
} DWunion;
#endif /* __ASM_LIBGCC_H */
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