vp32/CoreLibs/CpuID/Win32/VerifyXMMReg.asm

   1 ;//==========================================================================
   2 ;//
   3 ;//  THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
   4 ;//  KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
   5 ;//  IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
   6 ;//  PURPOSE.
   7 ;//
   8 ;//  Copyright (c) 1999 - 2001  On2 Technologies Inc. All Rights Reserved.
   9 ;//
  10 ;//--------------------------------------------------------------------------
  11
  12
  13 INCLUDE iaxmm.inc
  14
  15 ;
  16 ; **-VerifyXMMReg
  17 ;
  18 ; This function is meant to be run on a Windows NT system to
  19 ; try and determine if the OS supports the XMM registers or
  20 ; not.
  21 ;
  22 ; This function is number 3 in a set of three.  The other
  23 ; functions are...
  24 ;
  25 ;    InitXMMReg
  26 ;    TrashXMMReg
  27 ;
  28 ; Assumptions:
  29 ;   Assumes that InitXMMReg was called to initilize the XMM registers.
  30 ;   Assumes that TrashXMMReg was called from a different thread to clear
  31 ;   the values in the XMM registers.
  32 ;
  33 ; Input:
  34 ;   None
  35 ;
  36 ; Output:
  37 ;   Return 1 (True) if the XMM registers are at the correct values.
  38 ;   (os supports XMM registers)
  39 ;
  40 ;   Return 0 (False) if the XMM registers are not at the correct values.
  41 ;   (os does not support the XMM registers)
  42 ;
  43
  44         .586
  45         .MODEL  flat, SYSCALL, os_dos
  46         .DATA
  47
  48 TORQ_CX_DATA SEGMENT PAGE PUBLIC USE32 'DATA'
  49
  50          ALIGN 32
  51
  52
  53 NAME VerifyXMMReg
  54
  55 PUBLIC VerifyXMMReg_
  56 PUBLIC _VerifyXMMReg
  57
  58
  59 EXTERN XMM0Init:REAL4
  60 EXTERN XMM1Init:REAL4
  61 EXTERN XMM2Init:REAL4
  62
  63
  64         .CODE
  65
  66 ; int VerifyXMMReg( void )
  67 VerifyXMMReg_:
  68 _VerifyXMMReg:
  69     push    esi ;safety sh*&
  70     push    edi
  71     push    ebp
  72     push    ebx
  73     push    ecx
  74     push    edx
  75
  76     mov     eax,0                       ; assume will fail
  77
  78     comiss  xmm0,XMM0Init               ; check XMM0
  79     jne     Exit
  80
  81     comiss  xmm1,XMM1Init
  82     jne     Exit
  83
  84     comiss  xmm2,XMM2Init
  85     jne     Exit
  86
  87     mov     eax,1                       ; OS supports XMM registers
  88
  89 Exit:
  90     pop     edx ;safety sh*&
  91     pop     ecx
  92     pop     ebx
  93     pop     ebp
  94     pop     edi
  95     pop     esi
  96     ret
  97
  98 ;************************************************
  99          END