mirror of https://github.com/axmolengine/axmol.git
90 lines
3.2 KiB
C++
90 lines
3.2 KiB
C++
/**
|
|
* OpenAL cross platform audio library
|
|
* Copyright (C) 2014 by Timothy Arceri <t_arceri@yahoo.com.au>.
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
* Or go to http://www.gnu.org/copyleft/lgpl.html
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <xmmintrin.h>
|
|
#include <emmintrin.h>
|
|
|
|
#include "alnumeric.h"
|
|
#include "defs.h"
|
|
|
|
struct SSE2Tag;
|
|
struct LerpTag;
|
|
|
|
|
|
#if defined(__GNUC__) && !defined(__clang__) && !defined(__SSE2__)
|
|
#pragma GCC target("sse2")
|
|
#endif
|
|
|
|
template<>
|
|
float *Resample_<LerpTag,SSE2Tag>(const InterpState*, float *RESTRICT src, uint frac,
|
|
uint increment, const al::span<float> dst)
|
|
{
|
|
const __m128i increment4{_mm_set1_epi32(static_cast<int>(increment*4))};
|
|
const __m128 fracOne4{_mm_set1_ps(1.0f/MixerFracOne)};
|
|
const __m128i fracMask4{_mm_set1_epi32(MixerFracMask)};
|
|
|
|
alignas(16) uint pos_[4], frac_[4];
|
|
InitPosArrays(frac, increment, frac_, pos_);
|
|
__m128i frac4{_mm_setr_epi32(static_cast<int>(frac_[0]), static_cast<int>(frac_[1]),
|
|
static_cast<int>(frac_[2]), static_cast<int>(frac_[3]))};
|
|
__m128i pos4{_mm_setr_epi32(static_cast<int>(pos_[0]), static_cast<int>(pos_[1]),
|
|
static_cast<int>(pos_[2]), static_cast<int>(pos_[3]))};
|
|
|
|
auto dst_iter = dst.begin();
|
|
for(size_t todo{dst.size()>>2};todo;--todo)
|
|
{
|
|
const int pos0{_mm_cvtsi128_si32(pos4)};
|
|
const int pos1{_mm_cvtsi128_si32(_mm_srli_si128(pos4, 4))};
|
|
const int pos2{_mm_cvtsi128_si32(_mm_srli_si128(pos4, 8))};
|
|
const int pos3{_mm_cvtsi128_si32(_mm_srli_si128(pos4, 12))};
|
|
const __m128 val1{_mm_setr_ps(src[pos0 ], src[pos1 ], src[pos2 ], src[pos3 ])};
|
|
const __m128 val2{_mm_setr_ps(src[pos0+1], src[pos1+1], src[pos2+1], src[pos3+1])};
|
|
|
|
/* val1 + (val2-val1)*mu */
|
|
const __m128 r0{_mm_sub_ps(val2, val1)};
|
|
const __m128 mu{_mm_mul_ps(_mm_cvtepi32_ps(frac4), fracOne4)};
|
|
const __m128 out{_mm_add_ps(val1, _mm_mul_ps(mu, r0))};
|
|
|
|
_mm_store_ps(dst_iter, out);
|
|
dst_iter += 4;
|
|
|
|
frac4 = _mm_add_epi32(frac4, increment4);
|
|
pos4 = _mm_add_epi32(pos4, _mm_srli_epi32(frac4, MixerFracBits));
|
|
frac4 = _mm_and_si128(frac4, fracMask4);
|
|
}
|
|
|
|
if(size_t todo{dst.size()&3})
|
|
{
|
|
src += static_cast<uint>(_mm_cvtsi128_si32(pos4));
|
|
frac = static_cast<uint>(_mm_cvtsi128_si32(frac4));
|
|
|
|
do {
|
|
*(dst_iter++) = lerpf(src[0], src[1], static_cast<float>(frac) * (1.0f/MixerFracOne));
|
|
|
|
frac += increment;
|
|
src += frac>>MixerFracBits;
|
|
frac &= MixerFracMask;
|
|
} while(--todo);
|
|
}
|
|
return dst.data();
|
|
}
|