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powerpc: Added __cmpdi2 for signed 64bit comparision

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This was missing on powerpc and I am getting compilation error
drivers/vfio/pci/vfio_pci_rdwr.c:193: undefined reference to `__cmpdi2'
drivers/vfio/pci/vfio_pci_rdwr.c:193: undefined reference to `__cmpdi2'

Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Bharat Bhushan 2013-10-09 10:41:17 +05:30 committed by Benjamin Herrenschmidt
parent 8616dff5b0
commit 41b93b238a
2 changed files with 16 additions and 0 deletions
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14
arch/powerpc/kernel/misc_32.S
View File

@ -658,6 +658,20 @@ _GLOBAL(__lshrdi3)
or r4,r4,r7 # LSW |= t2
blr
/*
* 64-bit comparison: __cmpdi2(s64 a, s64 b)
* Returns 0 if a < b, 1 if a == b, 2 if a > b.
*/
_GLOBAL(__cmpdi2)
cmpw r3,r5
li r3,1
bne 1f
cmplw r4,r6
beqlr
1: li r3,0
bltlr
li r3,2
blr
/*
* 64-bit comparison: __ucmpdi2(u64 a, u64 b)
* Returns 0 if a < b, 1 if a == b, 2 if a > b.

2
arch/powerpc/kernel/ppc_ksyms.c
View File

@ -145,6 +145,8 @@ EXPORT_SYMBOL(__ashldi3);
EXPORT_SYMBOL(__lshrdi3);
int __ucmpdi2(unsigned long long, unsigned long long);
EXPORT_SYMBOL(__ucmpdi2);
int __cmpdi2(long long, long long);
EXPORT_SYMBOL(__cmpdi2);
#endif
long long __bswapdi2(long long);
EXPORT_SYMBOL(__bswapdi2);