xorg-server-1.4/hw/xfree86/os-support/shared/inout.S

   1 /* $XConsortium: inout.s /main/6 1996/02/21 17:53:35 kaleb $ */
   2
   3
   4
   5
   6
   7 /* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/shared/inout.S,v 1.1 1999/07/10 07:24:52 dawes Exp $ */
   8
   9 #include "assyntax.h"
  10
  11 /*
  12  *      Make i80386 io primitives available at C-level.
  13  */
  14
  15         FILE("inout.s")
  16         AS_BEGIN
  17         SEG_TEXT
  18
  19 /*
  20  *-----------------------------------------------------------------------
  21  * inb ---
  22  *      Input one byte.
  23  *
  24  * Results:
  25  *      Byte in al.
  26  *-----------------------------------------------------------------------
  27  */
  28         GLOBL   GLNAME(inb)
  29 GLNAME(inb):
  30         MOV_L   (REGOFF(4,ESP),EDX)
  31         SUB_L   (EAX,EAX)
  32         IN_B
  33         RET
  34
  35 /*
  36  *-----------------------------------------------------------------------
  37  * outb ---
  38  *      Output one byte.
  39  *
  40  * Results:
  41  *      None.
  42  *-----------------------------------------------------------------------
  43  */
  44         GLOBL   GLNAME(outb)
  45 GLNAME(outb):
  46         MOV_L   (REGOFF(4,sp),EDX)
  47         MOV_L   (REGOFF(8,sp),EAX)
  48         OUT_B
  49         RET
  50 /*
  51  *-----------------------------------------------------------------------
  52  * inw ---
  53  *      Input one 16-bit word.
  54  *
  55  * Results:
  56  *      Word in ax.
  57  *-----------------------------------------------------------------------
  58  */
  59         GLOBL   GLNAME(inw)
  60 GLNAME(inw):
  61         MOV_L   (REGOFF(4,ESP),EDX)
  62         IN_W
  63         RET
  64
  65 /*
  66  *-----------------------------------------------------------------------
  67  * outw ---
  68  *      Output one 16-bit word.
  69  *
  70  * Results:
  71  *      None.
  72  *-----------------------------------------------------------------------
  73  */
  74         GLOBL   GLNAME(outw)
  75 GLNAME(outw):
  76         MOV_L   (REGOFF(4,ESP),EDX)
  77         MOV_L   (REGOFF(8,ESP),EAX)
  78         OUT_W
  79         RET
  80
  81 /*
  82  *-----------------------------------------------------------------------
  83  * inl ---
  84  *      Input one 32-bit longword.
  85  *
  86  * Results:
  87  *      Word in eax.
  88  *-----------------------------------------------------------------------
  89  */
  90         GLOBL   GLNAME(inl)
  91 GLNAME(inl):
  92         MOV_L   (REGOFF(4,ESP),EDX)
  93         IN_L
  94         RET
  95
  96 /*
  97  *-----------------------------------------------------------------------
  98  * outl ---
  99  *      Output one 32-bit longword.
 100  *
 101  * Results:
 102  *      None.
 103  *-----------------------------------------------------------------------
 104  */
 105         GLOBL   GLNAME(outl)
 106 GLNAME(outl):
 107         MOV_L   (REGOFF(4,ESP),EDX)
 108         MOV_L   (REGOFF(8,ESP),EAX)
 109         OUT_L
 110         RET
 111