arch/alpha/lib/ev6-clear_page.S

   1 /*
   2  * arch/alpha/lib/ev6-clear_page.S
   3  *
   4  * Zero an entire page.
   5  */
   6
   7         .text
   8         .align 4
   9         .global clear_page
  10         .ent clear_page
  11 clear_page:
  12         .prologue 0
  13
  14         lda     $0,128
  15         lda     $1,125
  16         addq    $16,64,$2
  17         addq    $16,128,$3
  18
  19         addq    $16,192,$17
  20         wh64    ($16)
  21         wh64    ($2)
  22         wh64    ($3)
  23
  24 1:      wh64    ($17)
  25         stq     $31,0($16)
  26         subq    $0,1,$0
  27         subq    $1,1,$1
  28
  29         stq     $31,8($16)
  30         stq     $31,16($16)
  31         addq    $17,64,$2
  32         nop
  33
  34         stq     $31,24($16)
  35         stq     $31,32($16)
  36         cmovgt  $1,$2,$17
  37         nop
  38
  39         stq     $31,40($16)
  40         stq     $31,48($16)
  41         nop
  42         nop
  43
  44         stq     $31,56($16)
  45         addq    $16,64,$16
  46         nop
  47         bne     $0,1b
  48
  49         ret
  50         nop
  51         nop
  52         nop
  53
  54         .end clear_page