m32r: add __ucmpdi2 to fix build failure

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>
Sudip Mukherjee 7 years ago committed by Linus Torvalds
parent 8cde0daf6c
commit a44ce52363

@ -41,6 +41,9 @@ EXPORT_SYMBOL(cpu_data);
extern int __ucmpdi2(unsigned long long a, unsigned long long b);
/* compiler generated symbol */
extern void __ashldi3(void);
extern void __ashrdi3(void);

@ -3,5 +3,5 @@
lib-y := checksum.o ashxdi3.o memset.o memcpy.o \
delay.o strlen.o usercopy.o csum_partial_copy.o
delay.o strlen.o usercopy.o csum_partial_copy.o \

@ -0,0 +1,23 @@
#ifndef __ASM_LIBGCC_H
#define __ASM_LIBGCC_H
#include <asm/byteorder.h>
#ifdef __BIG_ENDIAN
struct DWstruct {
int high, low;
#elif defined(__LITTLE_ENDIAN)
struct DWstruct {
int low, high;
#error I feel sick.
typedef union {
struct DWstruct s;
long long ll;
} DWunion;
#endif /* __ASM_LIBGCC_H */

@ -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;