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1
;*****************************************************************************

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;* cpu-a.asm: x86 cpu utilities

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;*****************************************************************************

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;* Copyright (C) 2003-2016 x264 project

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;*

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;* Authors: Laurent Aimar <fenrir@via.ecp.fr>

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;*          Loren Merritt <lorenm@u.washington.edu>

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;*          Fiona Glaser <fiona@x264.com>

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;*

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;* This program is free software; you can redistribute it and/or modify

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;* it under the terms of the GNU General Public License as published by

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;* the Free Software Foundation; either version 2 of the License, or

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;* (at your option) any later version.

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;*

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;* This program is distributed in the hope that it will be useful,

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;* but WITHOUT ANY WARRANTY; without even the implied warranty of

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;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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;* GNU General Public License for more details.

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;*

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;* You should have received a copy of the GNU General Public License

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;* along with this program; if not, write to the Free Software

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;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111, USA.

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;*

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;* This program is also available under a commercial proprietary license.

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;* For more information, contact us at licensing@x264.com.

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;*****************************************************************************

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%include "x86inc.asm"

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SECTION .text

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;-----------------------------------------------------------------------------

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; void cpu_cpuid( int op, int *eax, int *ebx, int *ecx, int *edx )

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;-----------------------------------------------------------------------------

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cglobal cpu_cpuid, 5,7

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    push rbx

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    push  r4

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    push  r3

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    push  r2

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    push  r1

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    mov  eax, r0d

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    xor  ecx, ecx

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    cpuid

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    pop   r4

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    mov [r4], eax

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    pop   r4

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    mov [r4], ebx

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    pop   r4

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    mov [r4], ecx

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    pop   r4

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    mov [r4], edx

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    pop  rbx

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    RET

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;-----------------------------------------------------------------------------

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; void cpu_xgetbv( int op, int *eax, int *edx )

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;-----------------------------------------------------------------------------

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cglobal cpu_xgetbv, 3,7

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    push  r2

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    push  r1

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    mov  ecx, r0d

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    xgetbv

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    pop   r4

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    mov [r4], eax

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    pop   r4

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    mov [r4], edx

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    RET

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%if ARCH_X86_64

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;-----------------------------------------------------------------------------

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; void stack_align( void (*func)(void*), void *arg );

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;-----------------------------------------------------------------------------

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cglobal stack_align

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    push rbp

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    mov  rbp, rsp

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%if WIN64

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    sub  rsp, 32 ; shadow space

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%endif

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    and  rsp, ~31

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    mov  rax, r0

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    mov   r0, r1

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    mov   r1, r2

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    mov   r2, r3

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    call rax

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    leave

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    ret

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%else

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;-----------------------------------------------------------------------------

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; int cpu_cpuid_test( void )

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; return 0 if unsupported

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;-----------------------------------------------------------------------------

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cglobal cpu_cpuid_test

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    pushfd

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    push    ebx

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    push    ebp

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    push    esi

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    push    edi

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    pushfd

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    pop     eax

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    mov     ebx, eax

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    xor     eax, 0x200000

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    push    eax

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    popfd

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    pushfd

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    pop     eax

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    xor     eax, ebx

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    pop     edi

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    pop     esi

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    pop     ebp

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    pop     ebx

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    popfd

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    ret

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cglobal stack_align

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    push ebp

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    mov  ebp, esp

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    sub  esp, 12

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    and  esp, ~31

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    mov  ecx, [ebp+8]

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    mov  edx, [ebp+12]

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    mov  [esp], edx

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    mov  edx, [ebp+16]

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    mov  [esp+4], edx

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    mov  edx, [ebp+20]

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    mov  [esp+8], edx

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    call ecx

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    leave

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    ret

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%endif

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;-----------------------------------------------------------------------------

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; void cpu_emms( void )

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;-----------------------------------------------------------------------------

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cglobal cpu_emms

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    emms

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    ret

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;-----------------------------------------------------------------------------

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; void cpu_sfence( void )

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;-----------------------------------------------------------------------------

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cglobal cpu_sfence

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    sfence

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    ret

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