arch/arm/lib/bswapsdi2.S

   1 #include <linux/linkage.h>
   2 #include <asm/assembler.h>
   3
   4 #if __LINUX_ARM_ARCH__ >= 6
   5 ENTRY(__bswapsi2)
   6         rev r0, r0
   7         bx lr
   8 ENDPROC(__bswapsi2)
   9
  10 ENTRY(__bswapdi2)
  11         rev r3, r0
  12         rev r0, r1
  13         mov r1, r3
  14         bx lr
  15 ENDPROC(__bswapdi2)
  16 #else
  17 ENTRY(__bswapsi2)
  18         eor r3, r0, r0, ror #16
  19         mov r3, r3, lsr #8
  20         bic r3, r3, #0xff00
  21         eor r0, r3, r0, ror #8
  22         ret lr
  23 ENDPROC(__bswapsi2)
  24
  25 ENTRY(__bswapdi2)
  26         mov ip, r1
  27         eor r3, ip, ip, ror #16
  28         eor r1, r0, r0, ror #16
  29         mov r1, r1, lsr #8
  30         mov r3, r3, lsr #8
  31         bic r3, r3, #0xff00
  32         bic r1, r1, #0xff00
  33         eor r1, r1, r0, ror #8
  34         eor r0, r3, ip, ror #8
  35         ret lr
  36 ENDPROC(__bswapdi2)
  37 #endif