lib/i86/misc/io_inl.s

   1 !       inl() - Input one dword                         Author: Kees J. Bot
   2 !                                                               18 Mar 1996
   3 !       unsigned inl(U16_t port);
   4
   5         o32 = 0x66
   6
   7 .sect .text
   8 .define _inl
   9 _inl:
  10         push    bp
  11         mov     bp, sp
  12         pushf
  13         cli                             ! eax is not interrupt safe
  14         mov     dx, 4(bp)               ! port
  15         .data1  o32
  16         in      dx                      ! read 1 dword
  17         .data1  o32
  18         push    ax                      ! push eax
  19         pop     ax
  20         pop     dx                      ! dx:ax = eax
  21         popf
  22         pop     bp
  23         ret