ref: 5be0ed30dcf8ba836da78ee38460d4fa0ddc1b67
dir: /vp9/common/vp9_systemdependent.h/
/*
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef VP9_COMMON_VP9_SYSTEMDEPENDENT_H_
#define VP9_COMMON_VP9_SYSTEMDEPENDENT_H_
#ifdef _MSC_VER
#include <intrin.h>
#include <math.h>
#define snprintf _snprintf
#endif
#include "./vpx_config.h"
#if ARCH_X86 || ARCH_X86_64
void vpx_reset_mmx_state(void);
#define vp9_clear_system_state() vpx_reset_mmx_state()
#else
#define vp9_clear_system_state()
#endif
#if defined(_MSC_VER) && _MSC_VER < 1800
// round is not defined in MSVC before VS2013.
static int round(double x) {
if (x < 0)
return (int)ceil(x - 0.5);
else
return (int)floor(x + 0.5);
}
#endif
static const inline int get_msb(int x) {
#ifdef _MSC_VER
int r = 0;
_BitScanReverse(&r, x);
return r;
#else
return 31 ^ __builtin_clz(x);
#endif
}
struct VP9Common;
void vp9_machine_specific_config(struct VP9Common *cm);
#endif // VP9_COMMON_VP9_SYSTEMDEPENDENT_H_