root/arch/sh/lib/div64.S

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*      
   3  * unsigned long __xdiv64_32(unsigned long long n, unsigned long d); 
   4  */
   5 
   6 #include <linux/linkage.h>
   7 
   8 .text
   9 ENTRY(__xdiv64_32)
  10 #ifdef CONFIG_CPU_LITTLE_ENDIAN
  11         mov     r4, r0
  12         mov     r5, r1
  13 #else
  14         mov     r4, r1
  15         mov     r5, r0
  16 #endif
  17         cmp/hs  r6, r1
  18         bf.s    1f
  19          mov    #0, r2
  20 
  21         mov     r1, r2
  22         mov     #0, r3
  23         div0u
  24         .rept   32
  25         rotcl   r2
  26         div1    r6, r3
  27         .endr
  28         rotcl   r2
  29         mul.l   r6, r2
  30         sts     macl, r3
  31         sub     r3, r1
  32 1:
  33         div0u
  34         .rept   32
  35         rotcl   r0
  36         div1    r6, r1
  37         .endr
  38 #ifdef CONFIG_CPU_LITTLE_ENDIAN
  39         mov     r2, r1
  40         rts
  41          rotcl  r0
  42 #else
  43         rotcl   r0
  44         mov     r0, r1
  45         rts
  46          mov    r2, r0
  47 #endif