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Side by Side Diff: src/opts/SkBitmapProcState_opts_SSE2.cpp

Issue 1553233004: clean up dead x86 filter opts code (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Created 4 years, 11 months ago
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1 /* 1 /*
2 * Copyright 2009 The Android Open Source Project 2 * Copyright 2009 The Android Open Source Project
3 * 3 *
4 * Use of this source code is governed by a BSD-style license that can be 4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file. 5 * found in the LICENSE file.
6 */ 6 */
7 7
8 #include <emmintrin.h> 8 #include <emmintrin.h>
9 #include "SkBitmapProcState_opts_SSE2.h" 9 #include "SkBitmapProcState_opts_SSE2.h"
10 #include "SkColorPriv.h" 10 #include "SkColorPriv.h"
(...skipping 614 matching lines...) Expand 10 before | Expand all | Expand 10 after
625 } // while count >= 4 625 } // while count >= 4
626 } // if count >= 4 626 } // if count >= 4
627 627
628 while (count-- > 0) { 628 while (count-- > 0) {
629 *xy++ = (SkClampMax(fy >> 16, maxY) << 16) | 629 *xy++ = (SkClampMax(fy >> 16, maxY) << 16) |
630 SkClampMax(fx >> 16, maxX); 630 SkClampMax(fx >> 16, maxX);
631 fx += dx; 631 fx += dx;
632 fy += dy; 632 fy += dy;
633 } 633 }
634 } 634 }
635
636 /* SSE version of S32_D16_filter_DX_SSE2
637 * Definition is in section of "D16 functions for SRC == 8888" in SkBitmapProcS tate.cpp
638 * It combines S32_opaque_D32_filter_DX_SSE2 and SkPixel32ToPixel16
639 */
640 void S32_D16_filter_DX_SSE2(const SkBitmapProcState& s,
641 const uint32_t* xy,
642 int count, uint16_t* colors) {
643 SkASSERT(count > 0 && colors != nullptr);
644 SkASSERT(s.fFilterLevel != kNone_SkFilterQuality);
645 SkASSERT(kN32_SkColorType == s.fPixmap.colorType());
646 SkASSERT(s.fPixmap.isOpaque());
647
648 SkPMColor dstColor;
649 const char* srcAddr = static_cast<const char*>(s.fPixmap.addr());
650 size_t rb = s.fPixmap.rowBytes();
651 uint32_t XY = *xy++;
652 unsigned y0 = XY >> 14;
653 const uint32_t* row0 = reinterpret_cast<const uint32_t*>(srcAddr + (y0 >> 4) * rb);
654 const uint32_t* row1 = reinterpret_cast<const uint32_t*>(srcAddr + (XY & 0x3 FFF) * rb);
655 unsigned subY = y0 & 0xF;
656
657 // ( 0, 0, 0, 0, 0, 0, 0, 16)
658 __m128i sixteen = _mm_cvtsi32_si128(16);
659
660 // ( 0, 0, 0, 0, 16, 16, 16, 16)
661 sixteen = _mm_shufflelo_epi16(sixteen, 0);
662
663 // ( 0, 0, 0, 0, 0, 0, 0, y)
664 __m128i allY = _mm_cvtsi32_si128(subY);
665
666 // ( 0, 0, 0, 0, y, y, y, y)
667 allY = _mm_shufflelo_epi16(allY, 0);
668
669 // ( 0, 0, 0, 0, 16-y, 16-y, 16-y, 16-y)
670 __m128i negY = _mm_sub_epi16(sixteen, allY);
671
672 // (16-y, 16-y, 16-y, 16-y, y, y, y, y)
673 allY = _mm_unpacklo_epi64(allY, negY);
674
675 // (16, 16, 16, 16, 16, 16, 16, 16 )
676 sixteen = _mm_shuffle_epi32(sixteen, 0);
677
678 // ( 0, 0, 0, 0, 0, 0, 0, 0)
679 __m128i zero = _mm_setzero_si128();
680
681 do {
682 uint32_t XX = *xy++; // x0:14 | 4 | x1:14
683 unsigned x0 = XX >> 18;
684 unsigned x1 = XX & 0x3FFF;
685
686 // (0, 0, 0, 0, 0, 0, 0, x)
687 __m128i allX = _mm_cvtsi32_si128((XX >> 14) & 0x0F);
688
689 // (0, 0, 0, 0, x, x, x, x)
690 allX = _mm_shufflelo_epi16(allX, 0);
691
692 // (x, x, x, x, x, x, x, x)
693 allX = _mm_shuffle_epi32(allX, 0);
694
695 // (16-x, 16-x, 16-x, 16-x, 16-x, 16-x, 16-x)
696 __m128i negX = _mm_sub_epi16(sixteen, allX);
697
698 // Load 4 samples (pixels).
699 __m128i a00 = _mm_cvtsi32_si128(row0[x0]);
700 __m128i a01 = _mm_cvtsi32_si128(row0[x1]);
701 __m128i a10 = _mm_cvtsi32_si128(row1[x0]);
702 __m128i a11 = _mm_cvtsi32_si128(row1[x1]);
703
704 // (0, 0, a00, a10)
705 __m128i a00a10 = _mm_unpacklo_epi32(a10, a00);
706
707 // Expand to 16 bits per component.
708 a00a10 = _mm_unpacklo_epi8(a00a10, zero);
709
710 // ((a00 * (16-y)), (a10 * y)).
711 a00a10 = _mm_mullo_epi16(a00a10, allY);
712
713 // (a00 * (16-y) * (16-x), a10 * y * (16-x)).
714 a00a10 = _mm_mullo_epi16(a00a10, negX);
715
716 // (0, 0, a01, a10)
717 __m128i a01a11 = _mm_unpacklo_epi32(a11, a01);
718
719 // Expand to 16 bits per component.
720 a01a11 = _mm_unpacklo_epi8(a01a11, zero);
721
722 // (a01 * (16-y)), (a11 * y)
723 a01a11 = _mm_mullo_epi16(a01a11, allY);
724
725 // (a01 * (16-y) * x), (a11 * y * x)
726 a01a11 = _mm_mullo_epi16(a01a11, allX);
727
728 // (a00*w00 + a01*w01, a10*w10 + a11*w11)
729 __m128i sum = _mm_add_epi16(a00a10, a01a11);
730
731 // (DC, a00*w00 + a01*w01)
732 __m128i shifted = _mm_shuffle_epi32(sum, 0xEE);
733
734 // (DC, a00*w00 + a01*w01 + a10*w10 + a11*w11)
735 sum = _mm_add_epi16(sum, shifted);
736
737 // Divide each 16 bit component by 256.
738 sum = _mm_srli_epi16(sum, 8);
739
740 // Pack lower 4 16 bit values of sum into lower 4 bytes.
741 sum = _mm_packus_epi16(sum, zero);
742
743 // Extract low int and store.
744 dstColor = _mm_cvtsi128_si32(sum);
745
746 *colors++ = SkPixel32ToPixel16(dstColor);
747 } while (--count > 0);
748 }
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