Archive-Team
/
zfs
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases 103 Wiki Activity

Add __divmoddi4 and __udivmoddi4 for 32-bit arch 

gcc-7 seems to use __udivmoddi4 for 64-bit division on 32-bit arch. This
patch implement them so we don't get undefined reference error.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: loli10K <ezomori.nozomu@gmail.com>
Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Closes zfsonlinux/zfs#6417 
Closes #636
This commit is contained in:
Chunwei Chen 2017-08-03 10:41:42 -07:00 committed by Brian Behlendorf
parent 98cdcb8286
commit 6ecfd2b553
1 changed files with 43 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
module/spl/spl-generic.c
View File

@ -277,6 +277,49 @@ __umoddi3(uint64_t dividend, uint64_t divisor)
}
EXPORT_SYMBOL(__umoddi3);
/*
* Implementation of 64-bit unsigned division/modulo for 32-bit machines.
*/
uint64_t
__udivmoddi4(uint64_t n, uint64_t d, uint64_t *r)
{
uint64_t q = __udivdi3(n, d);
if (r)
*r = n - d * q;
return (q);
}
EXPORT_SYMBOL(__udivmoddi4);
/*
* Implementation of 64-bit signed division/modulo for 32-bit machines.
*/
int64_t
__divmoddi4(int64_t n, int64_t d, int64_t *r)
{
int64_t q, rr;
boolean_t nn = B_FALSE;
boolean_t nd = B_FALSE;
if (n < 0) {
nn = B_TRUE;
n = -n;
}
if (d < 0) {
nd = B_TRUE;
d = -d;
}
q = __udivmoddi4(n, d, (uint64_t *)&rr);
if (nn != nd)
q = -q;
if (nn)
rr = -rr;
if (r)
*r = rr;
return (q);
}
EXPORT_SYMBOL(__divmoddi4);
#if defined(__arm) || defined(__arm__)
/*
* Implementation of 64-bit (un)signed division for 32-bit arm machines.