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/*******************************************************************************
* avxfma4check.h
*
* This header file is included by texture.cpp,
*
* ---------------------------------------------------------------------------
* Persistence of Vision Ray Tracer ('POV-Ray') version 3.7.
* Copyright 1991-2013 Persistence of Vision Raytracer Pty. Ltd.
*
* POV-Ray is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* POV-Ray 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* ---------------------------------------------------------------------------
* POV-Ray is based on the popular DKB raytracer version 2.12.
* DKBTrace was originally written by David K. Buck.
* DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
* ---------------------------------------------------------------------------
* $File: //depot/public/povray/3.x/source/backend/texture/avxfma4check.h $
* $Revision: #1 $
* $Change: 6069 $
* $DateTime: 2013/11/06 11:59:40 $
* $Author: chrisc $
*******************************************************************************/
#ifndef __AVXFMA4_H__
#define __AVXFMA4_H__
/*****************************************************************************
*
* FUNCTION
*
* CPU_FMA4_DETECT
*
* INPUT
*
* None
*
* OUTPUT
*
* RETURNS
*
* Returns the status of the AVX and FMA4 bits
*
* AUTHOR
*
* AMD
*
* DESCRIPTION
*
* CHANGES
*
*
******************************************************************************/
#define CPUID __cpuid
#if defined(USE_AVX_FMA4_FOR_NOISE)
#if defined(LINUX)
#include <x86intrin.h>
static void __cpuid(int *out, int in) __attribute__((noinline));
static void __cpuid(int *out, int in)
{
__asm__ __volatile__(" pushq %%rbx; \
xorq %%rax, %%rax; \
movl %%esi, %%eax; \
cpuid; \
movl %%eax, 0x0(%%rdi); \
movl %%ebx, 0x4(%%rdi); \
movl %%ecx, 0x8(%%rdi); \
movl %%edx, 0xc(%%rdi); \
popq %%rbx;" \
: : "D" (out), "S" (in) \
: "%rax", "%rcx", "%rdx" );
}
#endif
static int CPU_FMA4_DETECT(void)
{
int avx = 0, fma4 = 0;
int info[4];
CPUID(info, 0x1);
if((info[2] & (0x1 << 27)) ? 1 : 0) /* check for osxsave*/
{
avx = (info[2] & (0x1 << 28)) ? 1 : 0;
CPUID(info, 0x80000001);
fma4 = (info[2] & (1 << 16)) ? 1 : 0;
return (avx & fma4);
}
else
{
return 0;
}
}
#endif
#endif //
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