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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/base/vector_math.h"
#include "media/base/vector_math_testing.h"
#include "base/cpu.h"
#include "base/logging.h"
namespace media {
namespace vector_math {
void FMAC(const float src[], float scale, int len, float dest[]) {
// Ensure |src| and |dest| are 16-byte aligned.
DCHECK_EQ(0u, reinterpret_cast<uintptr_t>(src) & (kRequiredAlignment - 1));
DCHECK_EQ(0u, reinterpret_cast<uintptr_t>(dest) & (kRequiredAlignment - 1));
// Rely on function level static initialization to keep VectorFMACProc
// selection thread safe.
typedef void (*VectorFMACProc)(const float src[], float scale, int len,
float dest[]);
#if defined(ARCH_CPU_X86_FAMILY)
#if defined(__SSE__)
static const VectorFMACProc kVectorFMACProc = FMAC_SSE;
#else
static const VectorFMACProc kVectorFMACProc =
base::CPU().has_sse() ? FMAC_SSE : FMAC_C;
#endif
#else
static const VectorFMACProc kVectorFMACProc = FMAC_C;
#endif
return kVectorFMACProc(src, scale, len, dest);
}
void FMAC_C(const float src[], float scale, int len, float dest[]) {
for (int i = 0; i < len; ++i)
dest[i] += src[i] * scale;
}
} // namespace vector_math
} // namespace media
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