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Add missing 64-bit divide for 32-bit ARM

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Leverage the existing generic 64-bit division operations which
were originally implemented for x86 to support ARM.  All that is
required is to make the symbols available to the linker with the
expected names.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Jorgen Lundman 2012-05-02 00:15:28 +00:00 committed by Brian Behlendorf
parent cb75844e85
commit ef6f91ce0c
1 changed files with 22 additions and 1 deletions
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23
module/spl/spl-generic.c
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@ -183,7 +183,7 @@ __udivdi3(uint64_t u, uint64_t v)
q0 = q0 - 1; // too small by 1. q0 = q0 - 1; // too small by 1.
if ((u - q0 * v) >= v) if ((u - q0 * v) >= v)
q0 = q0 + 1; // Now q0 is correct. q0 = q0 + 1; // Now q0 is correct.
return q0; return q0;
} }
} }
@ -212,6 +212,27 @@ __umoddi3(uint64_t dividend, uint64_t divisor)
} }
EXPORT_SYMBOL(__umoddi3); EXPORT_SYMBOL(__umoddi3);
#if defined(__arm) || defined(__arm__)
/*
* Implementation of 64-bit unsigned division for 32-bit arm machines.
*/
uint64_t
__aeabi_uldivmod(uint64_t u, uint64_t v)
{
return __udivdi3(u, v);
}
EXPORT_SYMBOL(__aeabi_uldivmod);
/*
* Implementation of 64-bit signed division for 32-bit arm machines.
*/
int64_t
__aeabi_ldivmod(int64_t u, int64_t v)
{
return __divdi3(u, v);
}
EXPORT_SYMBOL(__aeabi_ldivmod);
#endif /* __arm || __arm__ */
#endif /* BITS_PER_LONG */ #endif /* BITS_PER_LONG */
/* NOTE: The strtoxx behavior is solely based on my reading of the Solaris /* NOTE: The strtoxx behavior is solely based on my reading of the Solaris