image/qimage_ssse3.cpp

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3** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). -
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40****************************************************************************/ -
41 -
42#include <qimage.h> -
43#include <private/qimage_p.h> -
44#include <private/qsimd_p.h> -
45 -
46#ifdef QT_COMPILER_SUPPORTS_SSSE3 -
47 -
48QT_BEGIN_NAMESPACE -
49 -
50// Convert a scanline of RGB888 (src) to RGB32 (dst) -
51// src must be at least len * 3 bytes -
52// dst must be at least len * 4 bytes -
53Q_GUI_EXPORT void QT_FASTCALL qt_convert_rgb888_to_rgb32_ssse3(quint32 *dst, const uchar *src, int len) -
54{ -
55 quint32 *const end = dst + len;
executed (the execution status of this line is deduced): quint32 *const end = dst + len;
-
56 -
57 // Prologue, align dst to 16 bytes. The alignment is done on dst because it has 4 store() -
58 // for each 3 load() of src. -
59 const int offsetToAlignOn16Bytes = (4 - ((reinterpret_cast<quintptr>(dst) >> 2) & 0x3)) & 0x3;
executed (the execution status of this line is deduced): const int offsetToAlignOn16Bytes = (4 - ((reinterpret_cast<quintptr>(dst) >> 2) & 0x3)) & 0x3;
-
60 const int prologLength = qMin(len, offsetToAlignOn16Bytes);
executed (the execution status of this line is deduced): const int prologLength = qMin(len, offsetToAlignOn16Bytes);
-
61 -
62 for (int i = 0; i < prologLength; ++i) {
evaluated: i < prologLength
TRUEFALSE
yes
Evaluation Count:4692
yes
Evaluation Count:9505
4692-9505
63 *dst++ = qRgb(src[0], src[1], src[2]);
executed (the execution status of this line is deduced): *dst++ = qRgb(src[0], src[1], src[2]);
-
64 src += 3;
executed (the execution status of this line is deduced): src += 3;
-
65 }
executed: }
Execution Count:4692
4692
66 -
67 // Mask the 4 first colors of the RGB888 vector -
68 const __m128i shuffleMask = _mm_set_epi8(0xff, 9, 10, 11, 0xff, 6, 7, 8, 0xff, 3, 4, 5, 0xff, 0, 1, 2);
executed (the execution status of this line is deduced): const __m128i shuffleMask = _mm_set_epi8(0xff, 9, 10, 11, 0xff, 6, 7, 8, 0xff, 3, 4, 5, 0xff, 0, 1, 2);
-
69 -
70 // Mask the 4 last colors of a RGB888 vector with an offset of 1 (so the last 3 bytes are RGB) -
71 const __m128i shuffleMaskEnd = _mm_set_epi8(0xff, 13, 14, 15, 0xff, 10, 11, 12, 0xff, 7, 8, 9, 0xff, 4, 5, 6);
executed (the execution status of this line is deduced): const __m128i shuffleMaskEnd = _mm_set_epi8(0xff, 13, 14, 15, 0xff, 10, 11, 12, 0xff, 7, 8, 9, 0xff, 4, 5, 6);
-
72 -
73 // Mask to have alpha = 0xff -
74 const __m128i alphaMask = _mm_set1_epi32(0xff000000);
executed (the execution status of this line is deduced): const __m128i alphaMask = _mm_set1_epi32(0xff000000);
-
75 -
76 __m128i *inVectorPtr = (__m128i *)src;
executed (the execution status of this line is deduced): __m128i *inVectorPtr = (__m128i *)src;
-
77 __m128i *dstVectorPtr = (__m128i *)dst;
executed (the execution status of this line is deduced): __m128i *dstVectorPtr = (__m128i *)dst;
-
78 -
79 const int simdRoundCount = (len - prologLength) / 16; // one iteration in the loop converts 16 pixels
executed (the execution status of this line is deduced): const int simdRoundCount = (len - prologLength) / 16;
-
80 for (int i = 0; i < simdRoundCount; ++i) {
evaluated: i < simdRoundCount
TRUEFALSE
yes
Evaluation Count:106780
yes
Evaluation Count:9505
9505-106780
81 /* -
82 RGB888 has 5 pixels per vector, + 1 byte from the next pixel. The idea here is -
83 to load vectors of RGB888 and use palignr to select a vector out of two vectors. -
84 -
85 After 3 loads of RGB888 and 3 stores of RGB32, we have 4 pixels left in the last -
86 vector of RGB888, we can mask it directly to get a last store or RGB32. After that, -
87 the first next byte is a R, and we can loop for the next 16 pixels. -
88 -
89 The conversion itself is done with a byte permutation (pshufb). -
90 */ -
91 __m128i firstSrcVector = _mm_lddqu_si128(inVectorPtr);
executed (the execution status of this line is deduced): __m128i firstSrcVector = _mm_lddqu_si128(inVectorPtr);
-
92 __m128i outputVector = _mm_shuffle_epi8(firstSrcVector, shuffleMask);
executed (the execution status of this line is deduced): __m128i outputVector = _mm_shuffle_epi8(firstSrcVector, shuffleMask);
-
93 _mm_store_si128(dstVectorPtr, _mm_or_si128(outputVector, alphaMask));
executed (the execution status of this line is deduced): _mm_store_si128(dstVectorPtr, _mm_or_si128(outputVector, alphaMask));
-
94 ++inVectorPtr;
executed (the execution status of this line is deduced): ++inVectorPtr;
-
95 ++dstVectorPtr;
executed (the execution status of this line is deduced): ++dstVectorPtr;
-
96 -
97 // There are 4 unused bytes left in srcVector, we need to load the next 16 bytes -
98 // and load the next input with palignr -
99 __m128i secondSrcVector = _mm_lddqu_si128(inVectorPtr);
executed (the execution status of this line is deduced): __m128i secondSrcVector = _mm_lddqu_si128(inVectorPtr);
-
100 __m128i srcVector = _mm_alignr_epi8(secondSrcVector, firstSrcVector, 12);
executed (the execution status of this line is deduced): __m128i srcVector = _mm_alignr_epi8(secondSrcVector, firstSrcVector, 12);
-
101 outputVector = _mm_shuffle_epi8(srcVector, shuffleMask);
executed (the execution status of this line is deduced): outputVector = _mm_shuffle_epi8(srcVector, shuffleMask);
-
102 _mm_store_si128(dstVectorPtr, _mm_or_si128(outputVector, alphaMask));
executed (the execution status of this line is deduced): _mm_store_si128(dstVectorPtr, _mm_or_si128(outputVector, alphaMask));
-
103 ++inVectorPtr;
executed (the execution status of this line is deduced): ++inVectorPtr;
-
104 ++dstVectorPtr;
executed (the execution status of this line is deduced): ++dstVectorPtr;
-
105 firstSrcVector = secondSrcVector;
executed (the execution status of this line is deduced): firstSrcVector = secondSrcVector;
-
106 -
107 // We now have 8 unused bytes left in firstSrcVector -
108 secondSrcVector = _mm_lddqu_si128(inVectorPtr);
executed (the execution status of this line is deduced): secondSrcVector = _mm_lddqu_si128(inVectorPtr);
-
109 srcVector = _mm_alignr_epi8(secondSrcVector, firstSrcVector, 8);
executed (the execution status of this line is deduced): srcVector = _mm_alignr_epi8(secondSrcVector, firstSrcVector, 8);
-
110 outputVector = _mm_shuffle_epi8(srcVector, shuffleMask);
executed (the execution status of this line is deduced): outputVector = _mm_shuffle_epi8(srcVector, shuffleMask);
-
111 _mm_store_si128(dstVectorPtr, _mm_or_si128(outputVector, alphaMask));
executed (the execution status of this line is deduced): _mm_store_si128(dstVectorPtr, _mm_or_si128(outputVector, alphaMask));
-
112 ++inVectorPtr;
executed (the execution status of this line is deduced): ++inVectorPtr;
-
113 ++dstVectorPtr;
executed (the execution status of this line is deduced): ++dstVectorPtr;
-
114 -
115 // There are now 12 unused bytes in firstSrcVector. -
116 // We can mask them directly, almost there. -
117 outputVector = _mm_shuffle_epi8(secondSrcVector, shuffleMaskEnd);
executed (the execution status of this line is deduced): outputVector = _mm_shuffle_epi8(secondSrcVector, shuffleMaskEnd);
-
118 _mm_store_si128(dstVectorPtr, _mm_or_si128(outputVector, alphaMask));
executed (the execution status of this line is deduced): _mm_store_si128(dstVectorPtr, _mm_or_si128(outputVector, alphaMask));
-
119 ++dstVectorPtr;
executed (the execution status of this line is deduced): ++dstVectorPtr;
-
120 }
executed: }
Execution Count:106780
106780
121 src = (uchar *)inVectorPtr;
executed (the execution status of this line is deduced): src = (uchar *)inVectorPtr;
-
122 dst = (quint32 *)dstVectorPtr;
executed (the execution status of this line is deduced): dst = (quint32 *)dstVectorPtr;
-
123 -
124 while (dst != end) {
evaluated: dst != end
TRUEFALSE
yes
Evaluation Count:31271
yes
Evaluation Count:9505
9505-31271
125 *dst++ = qRgb(src[0], src[1], src[2]);
executed (the execution status of this line is deduced): *dst++ = qRgb(src[0], src[1], src[2]);
-
126 src += 3;
executed (the execution status of this line is deduced): src += 3;
-
127 }
executed: }
Execution Count:31271
31271
128}
executed: }
Execution Count:9505
9505
129 -
130void convert_RGB888_to_RGB32_ssse3(QImageData *dest, const QImageData *src, Qt::ImageConversionFlags) -
131{ -
132 Q_ASSERT(src->format == QImage::Format_RGB888);
executed (the execution status of this line is deduced): qt_noop();
-
133 Q_ASSERT(dest->format == QImage::Format_RGB32 || dest->format == QImage::Format_ARGB32 || dest->format == QImage::Format_ARGB32_Premultiplied);
executed (the execution status of this line is deduced): qt_noop();
-
134 Q_ASSERT(src->width == dest->width);
executed (the execution status of this line is deduced): qt_noop();
-
135 Q_ASSERT(src->height == dest->height);
executed (the execution status of this line is deduced): qt_noop();
-
136 -
137 const uchar *src_data = (uchar *) src->data;
executed (the execution status of this line is deduced): const uchar *src_data = (uchar *) src->data;
-
138 quint32 *dest_data = (quint32 *) dest->data;
executed (the execution status of this line is deduced): quint32 *dest_data = (quint32 *) dest->data;
-
139 -
140 for (int i = 0; i < src->height; ++i) {
evaluated: i < src->height
TRUEFALSE
yes
Evaluation Count:451
yes
Evaluation Count:9
9-451
141 qt_convert_rgb888_to_rgb32_ssse3(dest_data, src_data, src->width);
executed (the execution status of this line is deduced): qt_convert_rgb888_to_rgb32_ssse3(dest_data, src_data, src->width);
-
142 src_data += src->bytes_per_line;
executed (the execution status of this line is deduced): src_data += src->bytes_per_line;
-
143 dest_data = (quint32 *)((uchar*)dest_data + dest->bytes_per_line);
executed (the execution status of this line is deduced): dest_data = (quint32 *)((uchar*)dest_data + dest->bytes_per_line);
-
144 }
executed: }
Execution Count:451
451
145}
executed: }
Execution Count:9
9
146 -
147QT_END_NAMESPACE -
148 -
149#endif // QT_COMPILER_SUPPORTS_SSSE3 -
150 -
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