SSE2 implementation of S32_D565_Opaque_Dither
Run benchmarks with command line option "--forceDither true". The result
shows that all benchmarks exercised S32_D565_Opaque_Dither benefit from
this SSE2 optimization. Here are the data on i7-3770:
before after
constXTile_MM_filter 900.93 217.75 75.83%
constXTile_CC_filter_scale 907.59 225.65 75.14%
constXTile_RR_filter 903.33 219.41 75.71%
constXTile_MM_scale 902.45 221.46 75.46%
constXTile_CC 898.55 218.37 75.70%
constXTile_RR_scale 902.69 222.35 75.37%
repeatTile_4444_X 938.53 240.49 74.38%
gradient_radial2_mirror 16999.49 11540.39 32.11%
gradient_radial2_clamp_hicolor 17943.38 12501.71 30.33%
gradient_radial2_clamp 17816.36 12492.04 29.88%
bitmaprect_FF_filter_trans 47.81 10.98 77.03%
bitmaprect_FF_nofilter_trans 47.79 10.91 77.18%
bitmaprect_FF_filter_identity 47.74 10.89 77.18%
bitmaprect_FF_nofilter_identity 47.83 10.89 77.24%
bitmap_4444_update_scale_rotate_bilerp 100.45 76.84 23.50%
bitmap_4444_update_volatile_scale_rotate_bilerp 100.80 76.70 23.91%
bitmap_4444_scale_rotate_bilerp 100.43 77.18 23.15%
bitmap_4444_update_scale_bilerp 79.00 49.03 37.93%
bitmap_4444_update_volatile_scale_bilerp 78.90 48.87 38.06%
bitmap_4444_scale_bilerp 78.92 48.81 38.16%
bitmap_4444_update 42.19 11.53 72.68%
bitmap_4444_update_volatile 42.28 11.49 72.82%
bitmap_a8 60.37 29.75 50.72%
bitmap_4444 42.19 11.52 72.69%
BUG=
R=mtklein@google.com
Author: qiankun.miao@intel.com
Review URL: https://codereview.chromium.org/181293002
git-svn-id: http://skia.googlecode.com/svn/trunk@13698 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/opts/SkBlitRow_opts_SSE2.cpp b/src/opts/SkBlitRow_opts_SSE2.cpp
index 9e99b4b..fca42f3 100644
--- a/src/opts/SkBlitRow_opts_SSE2.cpp
+++ b/src/opts/SkBlitRow_opts_SSE2.cpp
@@ -10,6 +10,7 @@
#include "SkBitmapProcState_opts_SSE2.h"
#include "SkColorPriv.h"
#include "SkColor_opts_SSE2.h"
+#include "SkDither.h"
#include "SkUtils.h"
#include <emmintrin.h>
@@ -1051,3 +1052,117 @@
} while (--count != 0);
}
}
+
+void S32_D565_Opaque_Dither_SSE2(uint16_t* SK_RESTRICT dst,
+ const SkPMColor* SK_RESTRICT src,
+ int count, U8CPU alpha, int x, int y) {
+ SkASSERT(255 == alpha);
+
+ if (count <= 0) {
+ return;
+ }
+
+ if (count >= 8) {
+ while (((size_t)dst & 0x0F) != 0) {
+ DITHER_565_SCAN(y);
+ SkPMColor c = *src++;
+ SkPMColorAssert(c);
+
+ unsigned dither = DITHER_VALUE(x);
+ *dst++ = SkDitherRGB32To565(c, dither);
+ DITHER_INC_X(x);
+ count--;
+ }
+
+ unsigned short dither_value[8];
+ __m128i dither;
+#ifdef ENABLE_DITHER_MATRIX_4X4
+ const uint8_t* dither_scan = gDitherMatrix_3Bit_4X4[(y) & 3];
+ dither_value[0] = dither_value[4] = dither_scan[(x) & 3];
+ dither_value[1] = dither_value[5] = dither_scan[(x + 1) & 3];
+ dither_value[2] = dither_value[6] = dither_scan[(x + 2) & 3];
+ dither_value[3] = dither_value[7] = dither_scan[(x + 3) & 3];
+#else
+ const uint16_t dither_scan = gDitherMatrix_3Bit_16[(y) & 3];
+ dither_value[0] = dither_value[4] = (dither_scan
+ >> (((x) & 3) << 2)) & 0xF;
+ dither_value[1] = dither_value[5] = (dither_scan
+ >> (((x + 1) & 3) << 2)) & 0xF;
+ dither_value[2] = dither_value[6] = (dither_scan
+ >> (((x + 2) & 3) << 2)) & 0xF;
+ dither_value[3] = dither_value[7] = (dither_scan
+ >> (((x + 3) & 3) << 2)) & 0xF;
+#endif
+ dither = _mm_loadu_si128((__m128i*) dither_value);
+
+ const __m128i* s = reinterpret_cast<const __m128i*>(src);
+ __m128i* d = reinterpret_cast<__m128i*>(dst);
+
+ while (count >= 8) {
+ // Load 8 pixels of src.
+ __m128i src_pixel1 = _mm_loadu_si128(s++);
+ __m128i src_pixel2 = _mm_loadu_si128(s++);
+
+ // Extract R from src.
+ __m128i sr1 = _mm_slli_epi32(src_pixel1, (24 - SK_R32_SHIFT));
+ sr1 = _mm_srli_epi32(sr1, 24);
+ __m128i sr2 = _mm_slli_epi32(src_pixel2, (24 - SK_R32_SHIFT));
+ sr2 = _mm_srli_epi32(sr2, 24);
+ __m128i sr = _mm_packs_epi32(sr1, sr2);
+
+ // SkDITHER_R32To565(sr, dither)
+ __m128i sr_offset = _mm_srli_epi16(sr, 5);
+ sr = _mm_add_epi16(sr, dither);
+ sr = _mm_sub_epi16(sr, sr_offset);
+ sr = _mm_srli_epi16(sr, SK_R32_BITS - SK_R16_BITS);
+
+ // Extract G from src.
+ __m128i sg1 = _mm_slli_epi32(src_pixel1, (24 - SK_G32_SHIFT));
+ sg1 = _mm_srli_epi32(sg1, 24);
+ __m128i sg2 = _mm_slli_epi32(src_pixel2, (24 - SK_G32_SHIFT));
+ sg2 = _mm_srli_epi32(sg2, 24);
+ __m128i sg = _mm_packs_epi32(sg1, sg2);
+
+ // SkDITHER_R32To565(sg, dither)
+ __m128i sg_offset = _mm_srli_epi16(sg, 6);
+ sg = _mm_add_epi16(sg, _mm_srli_epi16(dither, 1));
+ sg = _mm_sub_epi16(sg, sg_offset);
+ sg = _mm_srli_epi16(sg, SK_G32_BITS - SK_G16_BITS);
+
+ // Extract B from src.
+ __m128i sb1 = _mm_slli_epi32(src_pixel1, (24 - SK_B32_SHIFT));
+ sb1 = _mm_srli_epi32(sb1, 24);
+ __m128i sb2 = _mm_slli_epi32(src_pixel2, (24 - SK_B32_SHIFT));
+ sb2 = _mm_srli_epi32(sb2, 24);
+ __m128i sb = _mm_packs_epi32(sb1, sb2);
+
+ // SkDITHER_R32To565(sb, dither)
+ __m128i sb_offset = _mm_srli_epi16(sb, 5);
+ sb = _mm_add_epi16(sb, dither);
+ sb = _mm_sub_epi16(sb, sb_offset);
+ sb = _mm_srli_epi16(sb, SK_B32_BITS - SK_B16_BITS);
+
+ // Pack and store 16-bit dst pixel.
+ __m128i d_pixel = SkPackRGB16_SSE(sr, sg, sb);
+ _mm_store_si128(d++, d_pixel);
+
+ count -= 8;
+ x += 8;
+ }
+
+ src = reinterpret_cast<const SkPMColor*>(s);
+ dst = reinterpret_cast<uint16_t*>(d);
+ }
+
+ if (count > 0) {
+ DITHER_565_SCAN(y);
+ do {
+ SkPMColor c = *src++;
+ SkPMColorAssert(c);
+
+ unsigned dither = DITHER_VALUE(x);
+ *dst++ = SkDitherRGB32To565(c, dither);
+ DITHER_INC_X(x);
+ } while (--count != 0);
+ }
+}