100 lines
2.1 KiB
NASM
100 lines
2.1 KiB
NASM
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;//==========================================================================
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;//
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;// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
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;// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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;// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
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;// PURPOSE.
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;//
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;// Copyright (c) 1999 - 2001 On2 Technologies Inc. All Rights Reserved.
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;//
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;//--------------------------------------------------------------------------
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;
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; **-VerifyXMMReg
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;
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; This function is meant to be run on a Windows NT system to
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; try and determine if the OS supports the XMM registers or
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; not.
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;
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; This function is number 3 in a set of three. The other
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; functions are...
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;
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; InitXMMReg
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; TrashXMMReg
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;
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; Assumptions:
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; Assumes that InitXMMReg was called to initilize the XMM registers.
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; Assumes that TrashXMMReg was called from a different thread to clear
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; the values in the XMM registers.
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;
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; Input:
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; None
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;
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; Output:
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; Return 1 (True) if the XMM registers are at the correct values.
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; (os supports XMM registers)
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;
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; Return 0 (False) if the XMM registers are not at the correct values.
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; (os does not support the XMM registers)
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;
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.686P
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.XMM
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.MODEL flat, SYSCALL, os_dos
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.DATA
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TORQ_CX_DATA SEGMENT PAGE PUBLIC USE32 'DATA'
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ALIGN 32
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NAME VerifyXMMReg
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PUBLIC VerifyXMMReg_
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PUBLIC _VerifyXMMReg
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EXTERN XMM0Init:REAL4
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EXTERN XMM1Init:REAL4
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EXTERN XMM2Init:REAL4
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.CODE
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; int VerifyXMMReg( void )
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VerifyXMMReg_:
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_VerifyXMMReg:
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push esi ;safety sh*&
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push edi
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push ebp
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push ebx
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push ecx
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push edx
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mov eax,0 ; assume will fail
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comiss xmm0,XMM0Init ; check XMM0
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jne Exit
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comiss xmm1,XMM1Init
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jne Exit
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comiss xmm2,XMM2Init
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jne Exit
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mov eax,1 ; OS supports XMM registers
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Exit:
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pop edx ;safety sh*&
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pop ecx
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pop ebx
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pop ebp
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pop edi
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pop esi
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ret
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;************************************************
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END
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