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      1 /*
      2  * Copyright (C) 2011 University of Szeged
      3  * Copyright (C) 2011 Felician Marton
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY UNIVERSITY OF SZEGED ``AS IS'' AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL UNIVERSITY OF SZEGED OR
     18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #ifndef FECompositeArithmeticNEON_h
     28 #define FECompositeArithmeticNEON_h
     29 
     30 #if HAVE(ARM_NEON_INTRINSICS)
     31 
     32 #include "platform/graphics/filters/FEComposite.h"
     33 #include <arm_neon.h>
     34 
     35 namespace blink {
     36 
     37 template <int b1, int b4>
     38 inline void FEComposite::computeArithmeticPixelsNeon(unsigned char* source, unsigned char* destination,
     39     unsigned pixelArrayLength, float k1, float k2, float k3, float k4)
     40 {
     41     float32x4_t k1x4 = vdupq_n_f32(k1 / 255);
     42     float32x4_t k2x4 = vdupq_n_f32(k2);
     43     float32x4_t k3x4 = vdupq_n_f32(k3);
     44     float32x4_t k4x4 = vdupq_n_f32(k4 * 255);
     45     uint32x4_t max255 = vdupq_n_u32(255);
     46 
     47     uint32_t* sourcePixel = reinterpret_cast<uint32_t*>(source);
     48     uint32_t* destinationPixel = reinterpret_cast<uint32_t*>(destination);
     49     uint32_t* destinationEndPixel = destinationPixel + (pixelArrayLength >> 2);
     50 
     51     while (destinationPixel < destinationEndPixel) {
     52         uint32x2_t temporary1 = vset_lane_u32(*sourcePixel, temporary1, 0);
     53         uint16x4_t temporary2 = vget_low_u16(vmovl_u8(vreinterpret_u8_u32(temporary1)));
     54         float32x4_t sourcePixelAsFloat = vcvtq_f32_u32(vmovl_u16(temporary2));
     55 
     56         temporary1 = vset_lane_u32(*destinationPixel, temporary1, 0);
     57         temporary2 = vget_low_u16(vmovl_u8(vreinterpret_u8_u32(temporary1)));
     58         float32x4_t destinationPixelAsFloat = vcvtq_f32_u32(vmovl_u16(temporary2));
     59 
     60         float32x4_t result = vmulq_f32(sourcePixelAsFloat, k2x4);
     61         result = vmlaq_f32(result, destinationPixelAsFloat, k3x4);
     62         if (b1)
     63             result = vmlaq_f32(result, vmulq_f32(sourcePixelAsFloat, destinationPixelAsFloat), k1x4);
     64         if (b4)
     65             result = vaddq_f32(result, k4x4);
     66 
     67         // Convert result to uint so negative values are converted to zero.
     68         uint16x4_t temporary3 = vmovn_u32(vminq_u32(vcvtq_u32_f32(result), max255));
     69         uint8x8_t temporary4 = vmovn_u16(vcombine_u16(temporary3, temporary3));
     70         *destinationPixel++ = vget_lane_u32(vreinterpret_u32_u8(temporary4), 0);
     71         ++sourcePixel;
     72     }
     73 }
     74 
     75 inline void FEComposite::platformArithmeticNeon(unsigned char* source, unsigned char* destination,
     76     unsigned pixelArrayLength, float k1, float k2, float k3, float k4)
     77 {
     78     if (!k4) {
     79         if (!k1) {
     80             computeArithmeticPixelsNeon<0, 0>(source, destination, pixelArrayLength, k1, k2, k3, k4);
     81             return;
     82         }
     83 
     84         computeArithmeticPixelsNeon<1, 0>(source, destination, pixelArrayLength, k1, k2, k3, k4);
     85         return;
     86     }
     87 
     88     if (!k1) {
     89         computeArithmeticPixelsNeon<0, 1>(source, destination, pixelArrayLength, k1, k2, k3, k4);
     90         return;
     91     }
     92     computeArithmeticPixelsNeon<1, 1>(source, destination, pixelArrayLength, k1, k2, k3, k4);
     93 }
     94 
     95 } // namespace blink
     96 
     97 #endif // HAVE(ARM_NEON_INTRINSICS)
     98 
     99 #endif // FECompositeArithmeticNEON_h
    100