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ojph_colour_avx.cpp
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//***************************************************************************/
// This software is released under the 2-Clause BSD license, included
// below.
//
// Copyright (c) 2019, Aous Naman
// Copyright (c) 2019, Kakadu Software Pty Ltd, Australia
// Copyright (c) 2019, The University of New South Wales, Australia
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//***************************************************************************/
// This file is part of the OpenJPH software implementation.
// File: ojph_colour_avx.cpp
// Author: Aous Naman
// Date: 11 October 2019
//***************************************************************************/
#include "ojph_arch.h"
#if defined(OJPH_ARCH_I386) || defined(OJPH_ARCH_X86_64)
#include <cmath>
#include "ojph_defs.h"
#include "ojph_colour.h"
#include "ojph_colour_local.h"
#include <immintrin.h>
namespace ojph {
namespace local {
void avx_ict_forward(const float *r, const float *g, const float *b,
float *y, float *cb, float *cr, ui32 repeat)
{
__m256 alpha_rf = _mm256_set1_ps(CT_CNST::ALPHA_RF);
__m256 alpha_gf = _mm256_set1_ps(CT_CNST::ALPHA_GF);
__m256 alpha_bf = _mm256_set1_ps(CT_CNST::ALPHA_BF);
__m256 beta_cbf = _mm256_set1_ps(CT_CNST::BETA_CbF);
__m256 beta_crf = _mm256_set1_ps(CT_CNST::BETA_CrF);
for (int i = (repeat + 7) >> 3; i > 0; --i)
{
__m256 mr = _mm256_load_ps(r);
__m256 mb = _mm256_load_ps(b);
__m256 my = _mm256_mul_ps(alpha_rf, mr);
my = _mm256_add_ps(my, _mm256_mul_ps(alpha_gf, _mm256_load_ps(g)));
my = _mm256_add_ps(my, _mm256_mul_ps(alpha_bf, mb));
_mm256_store_ps(y, my);
_mm256_store_ps(cb, _mm256_mul_ps(beta_cbf, _mm256_sub_ps(mb, my)));
_mm256_store_ps(cr, _mm256_mul_ps(beta_crf, _mm256_sub_ps(mr, my)));
r += 8; g += 8; b += 8;
y += 8; cb += 8; cr += 8;
}
}
void avx_ict_backward(const float *y, const float *cb, const float *cr,
float *r, float *g, float *b, ui32 repeat)
{
__m256 gamma_cr2g = _mm256_set1_ps(CT_CNST::GAMMA_CR2G);
__m256 gamma_cb2g = _mm256_set1_ps(CT_CNST::GAMMA_CB2G);
__m256 gamma_cr2r = _mm256_set1_ps(CT_CNST::GAMMA_CR2R);
__m256 gamma_cb2b = _mm256_set1_ps(CT_CNST::GAMMA_CB2B);
for (int i = (repeat + 7) >> 3; i > 0; --i)
{
__m256 my = _mm256_load_ps(y);
__m256 mcr = _mm256_load_ps(cr);
__m256 mcb = _mm256_load_ps(cb);
__m256 mg = _mm256_sub_ps(my, _mm256_mul_ps(gamma_cr2g, mcr));
_mm256_store_ps(g, _mm256_sub_ps(mg, _mm256_mul_ps(gamma_cb2g, mcb)));
_mm256_store_ps(r, _mm256_add_ps(my, _mm256_mul_ps(gamma_cr2r, mcr)));
_mm256_store_ps(b, _mm256_add_ps(my, _mm256_mul_ps(gamma_cb2b, mcb)));
y += 8; cb += 8; cr += 8;
r += 8; g += 8; b += 8;
}
}
}
}
#endif
ojph::local
Definition ojph_bitbuffer_read.h:52
ojph::local::avx_ict_forward
void avx_ict_forward(const float *r, const float *g, const float *b, float *y, float *cb, float *cr, ui32 repeat)
ojph::local::avx_ict_backward
void avx_ict_backward(const float *y, const float *cb, const float *cr, float *r, float *g, float *b, ui32 repeat)
ojph
Definition ojph_img_io.h:52
ojph::ui32
uint32_t ui32
Definition ojph_defs.h:54
ojph_arch.h
ojph_colour.h
ojph_colour_local.h
ojph_defs.h
ojph::local::CT_CNST::GAMMA_CR2R
static const float GAMMA_CR2R
Definition ojph_colour_local.h:53
ojph::local::CT_CNST::BETA_CbF
static const float BETA_CbF
Definition ojph_colour_local.h:51
ojph::local::CT_CNST::GAMMA_CB2B
static const float GAMMA_CB2B
Definition ojph_colour_local.h:54
ojph::local::CT_CNST::ALPHA_RF
static const float ALPHA_RF
Definition ojph_colour_local.h:48
ojph::local::CT_CNST::GAMMA_CB2G
static const float GAMMA_CB2G
Definition ojph_colour_local.h:56
ojph::local::CT_CNST::GAMMA_CR2G
static const float GAMMA_CR2G
Definition ojph_colour_local.h:55
ojph::local::CT_CNST::ALPHA_BF
static const float ALPHA_BF
Definition ojph_colour_local.h:50
ojph::local::CT_CNST::BETA_CrF
static const float BETA_CrF
Definition ojph_colour_local.h:52
ojph::local::CT_CNST::ALPHA_GF
static const float ALPHA_GF
Definition ojph_colour_local.h:49