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m32r: add __ucmpdi2 to fix build failure

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We are having build failure with m32r and the error message being:

  ERROR: "__ucmpdi2" [lib/842/842_decompress.ko] undefined!
  ERROR: "__ucmpdi2" [fs/btrfs/btrfs.ko] undefined!
  ERROR: "__ucmpdi2" [drivers/scsi/sd_mod.ko] undefined!
  ERROR: "__ucmpdi2" [drivers/media/i2c/adv7842.ko] undefined!
  ERROR: "__ucmpdi2" [drivers/md/bcache/bcache.ko] undefined!
  ERROR: "__ucmpdi2" [drivers/iio/imu/inv_mpu6050/inv-mpu6050.ko] undefined!

__ucmpdi2 is introduced to m32r architecture taking example from other
architectures like h8300, microblaze, mips.

Link: http://lkml.kernel.org/r/1465509213-4280-1-git-send-email-sudipm.mukherjee@gmail.com
Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Sudip Mukherjee
2016-07-26 15:21:23 -07:00
committed by Linus Torvalds
parent 8cde0daf6c
commit a44ce52363
4 changed files with 45 additions and 2 deletions
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17
arch/m32r/lib/ucmpdi2.c Normal file
View File

@@ -0,0 +1,17 @@
#include "libgcc.h"
int __ucmpdi2(unsigned long long a, unsigned long long b)
{
const DWunion au = {.ll = a};
const DWunion bu = {.ll = b};
if ((unsigned int)au.s.high < (unsigned int)bu.s.high)
return 0;
else if ((unsigned int)au.s.high > (unsigned int)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;
}