OpenJPH
Open-source implementation of JPEG2000 Part-15
ojph_colour_sse2.cpp
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5 // Copyright (c) 2019, Aous Naman
6 // Copyright (c) 2019, Kakadu Software Pty Ltd, Australia
7 // Copyright (c) 2019, The University of New South Wales, Australia
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31 //***************************************************************************/
32 // This file is part of the OpenJPH software implementation.
33 // File: ojph_colour_sse2.cpp
34 // Author: Aous Naman
35 // Date: 11 October 2019
36 //***************************************************************************/
37 
38 #include <cmath>
39 
40 #include "ojph_defs.h"
41 #include "ojph_arch.h"
42 #include "ojph_colour.h"
43 
44 #include <immintrin.h>
45 
46 namespace ojph {
47  namespace local {
48 
50  void sse2_cnvrt_float_to_si32_shftd(const float *sp, si32 *dp, float mul,
51  ui32 width)
52  {
53  uint32_t rounding_mode = _MM_GET_ROUNDING_MODE();
54  _MM_SET_ROUNDING_MODE(_MM_ROUND_NEAREST);
55  __m128 shift = _mm_set1_ps(0.5f);
56  __m128 m = _mm_set1_ps(mul);
57  for (int i = (width + 3) >> 2; i > 0; --i, sp+=4, dp+=4)
58  {
59  __m128 t = _mm_loadu_ps(sp);
60  __m128 s = _mm_add_ps(t, shift);
61  s = _mm_mul_ps(s, m);
62  _mm_storeu_si128((__m128i*)dp, _mm_cvtps_epi32(s));
63  }
64  _MM_SET_ROUNDING_MODE(rounding_mode);
65  }
66 
68  void sse2_cnvrt_float_to_si32(const float *sp, si32 *dp, float mul,
69  ui32 width)
70  {
71  uint32_t rounding_mode = _MM_GET_ROUNDING_MODE();
72  _MM_SET_ROUNDING_MODE(_MM_ROUND_NEAREST);
73  __m128 m = _mm_set1_ps(mul);
74  for (int i = (width + 3) >> 2; i > 0; --i, sp+=4, dp+=4)
75  {
76  __m128 t = _mm_loadu_ps(sp);
77  __m128 s = _mm_mul_ps(t, m);
78  _mm_storeu_si128((__m128i*)dp, _mm_cvtps_epi32(s));
79  }
80  _MM_SET_ROUNDING_MODE(rounding_mode);
81  }
82 
83 
85  void sse2_cnvrt_si32_to_si32_shftd(const si32 *sp, si32 *dp, int shift,
86  ui32 width)
87  {
88  __m128i sh = _mm_set1_epi32(shift);
89  for (int i = (width + 3) >> 2; i > 0; --i, sp+=4, dp+=4)
90  {
91  __m128i s = _mm_loadu_si128((__m128i*)sp);
92  s = _mm_add_epi32(s, sh);
93  _mm_storeu_si128((__m128i*)dp, s);
94  }
95  }
96 
98  void sse2_rct_forward(const si32 *r, const si32 *g, const si32 *b,
99  si32 *y, si32 *cb, si32 *cr, ui32 repeat)
100  {
101  for (int i = (repeat + 3) >> 2; i > 0; --i)
102  {
103  __m128i mr = _mm_load_si128((__m128i*)r);
104  __m128i mg = _mm_load_si128((__m128i*)g);
105  __m128i mb = _mm_load_si128((__m128i*)b);
106  __m128i t = _mm_add_epi32(mr, mb);
107  t = _mm_add_epi32(t, _mm_slli_epi32(mg, 1));
108  _mm_store_si128((__m128i*)y, _mm_srai_epi32(t, 2));
109  t = _mm_sub_epi32(mb, mg);
110  _mm_store_si128((__m128i*)cb, t);
111  t = _mm_sub_epi32(mr, mg);
112  _mm_store_si128((__m128i*)cr, t);
113 
114  r += 4; g += 4; b += 4;
115  y += 4; cb += 4; cr += 4;
116  }
117  }
118 
120  void sse2_rct_backward(const si32 *y, const si32 *cb, const si32 *cr,
121  si32 *r, si32 *g, si32 *b, ui32 repeat)
122  {
123  for (int i = (repeat + 3) >> 2; i > 0; --i)
124  {
125  __m128i my = _mm_load_si128((__m128i*)y);
126  __m128i mcb = _mm_load_si128((__m128i*)cb);
127  __m128i mcr = _mm_load_si128((__m128i*)cr);
128 
129  __m128i t = _mm_add_epi32(mcb, mcr);
130  t = _mm_sub_epi32(my, _mm_srai_epi32(t, 2));
131  _mm_store_si128((__m128i*)g, t);
132  __m128i u = _mm_add_epi32(mcb, t);
133  _mm_store_si128((__m128i*)b, u);
134  u = _mm_add_epi32(mcr, t);
135  _mm_store_si128((__m128i*)r, u);
136 
137  y += 4; cb += 4; cr += 4;
138  r += 4; g += 4; b += 4;
139  }
140  }
141 
142  }
143 }
void sse2_rct_forward(const si32 *r, const si32 *g, const si32 *b, si32 *y, si32 *cb, si32 *cr, ui32 repeat)
void sse2_cnvrt_float_to_si32_shftd(const float *sp, si32 *dp, float mul, ui32 width)
void sse2_cnvrt_si32_to_si32_shftd(const si32 *sp, si32 *dp, int shift, ui32 width)
void sse2_rct_backward(const si32 *y, const si32 *cb, const si32 *cr, si32 *r, si32 *g, si32 *b, ui32 repeat)
void sse2_cnvrt_float_to_si32(const float *sp, si32 *dp, float mul, ui32 width)
int32_t si32
Definition: ojph_defs.h:55
uint32_t ui32
Definition: ojph_defs.h:54