cpu-a.asm

在dsp上实现h.264编解码

;*****************************************************************************
;* cpu.asm: h264 encoder library
;*****************************************************************************
;* Copyright (C) 2003 x264 project
;* $Id: cpu.asm,v 1.1 2004/06/03 19:27:07 fenrir Exp $
;*
;* Authors: Laurent Aimar <[e-mail]>
;*
;* This program is free software; you can redistribute it and/or modify
;* it under the terms of the GNU General Public License as published by
;* the Free Software Foundation; either version 2 of the License, or
;* (at your option) any later version.
;*
;* This program is distributed in the hope that it will be useful,
;* but WITHOUT ANY WARRANTY; without even the implied warranty of
;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;* GNU General Public License for more details.
;*
;* You should have received a copy of the GNU General Public License
;* along with this program; if not, write to the Free Software
;* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
;*****************************************************************************

BITS 64

;=============================================================================
; Macros and other preprocessor constants
;=============================================================================

%include "amd64inc.asm"

;=============================================================================
; Code
;=============================================================================

SECTION .text

cglobal x264_cpu_cpuid_test
cglobal x264_cpu_cpuid
cglobal x264_emms

ALIGN 16
;-----------------------------------------------------------------------------
;   int x264_cpu_cpuid_test( void ) return 0 if unsupported
;-----------------------------------------------------------------------------
x264_cpu_cpuid_test:
    firstpush rbx
    pushreg  rbx
    push     rbp
    pushreg  rbp
    mov      rbp, rsp
    setframe rbp, 0
    endprolog

    pushfq
    pop     rax
    mov     ebx, eax
    xor     eax, 0x200000
    push    rax
    
    popfq
    pushfq
    pop     rax
    xor     eax, ebx
    
    lea     rsp, [rbp]
    pop     rbp
    pop     rbx
    ret
    endfunc

ALIGN 16
;-----------------------------------------------------------------------------
;   int x264_cpu_cpuid( int op, int *eax, int *ebx, int *ecx, int *edx )
;-----------------------------------------------------------------------------
x264_cpu_cpuid:
    firstpush rbx
    pushreg   rbx
    endprolog
    
    mov     r10,   parm4q
    mov     r11,   parm3q
    mov     r9,    parm2q
%ifdef WIN64
    mov     r8,    [rsp+40+8]
%endif    
    
    mov     eax,   parm1d
    cpuid

    mov     [r9],  eax
    mov     [r11], ebx
    mov     [r10], ecx
    mov     [r8],  edx

    pop     rbx
    ret
    endfunc

ALIGN 16
;-----------------------------------------------------------------------------
;   void x264_emms( void )
;-----------------------------------------------------------------------------
x264_emms:
    emms
    ret