another batch of lowp stages

The 4444 image in all_bitmap_configs now draws slightly different before
and after serialization.  (It's serialized as 8888.)  Still looks fine.

Change-Id: I1396cf1550b6769a1734ed25d59bd5b1866dfacd
Reviewed-on: https://skia-review.googlesource.com/65960
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>

infra/bots/recipes/test.expected/Test-Android-Clang-Nexus10-CPU-Exynos5250-arm-Release-All-Android.json

@@ -678,7 +678,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "set -x; /data/local/tmp/dm --resourcePath /sdcard/revenge_of_the_skiabot/resources --skps /sdcard/revenge_of_the_skiabot/skps --images /sdcard/revenge_of_the_skiabot/images/dm --colorImages /sdcard/revenge_of_the_skiabot/images/colorspace --nameByHash --properties gitHash abc123 builder Test-Android-Clang-Nexus10-CPU-Exynos5250-arm-Release-All-Android swarming_bot_id skia-bot-123 swarming_task_id 123456 --svgs /sdcard/revenge_of_the_skiabot/svgs --key arch arm compiler Clang configuration Release cpu_or_gpu CPU cpu_or_gpu_value Exynos5250 extra_config Android model Nexus10 os Android --uninterestingHashesFile /sdcard/revenge_of_the_skiabot/uninteresting_hashes.txt --writePath /sdcard/revenge_of_the_skiabot/dm_out --dont_write pdf --ignoreSigInt --nogpu --config 8888 srgb serialize-8888 tiles_rt-8888 pic-8888 --src tests gm image colorImage --blacklist _ test _ GrShape serialize-8888 gm _ bleed_image serialize-8888 gm _ c_gms serialize-8888 gm _ colortype serialize-8888 gm _ colortype_xfermodes serialize-8888 gm _ drawfilter serialize-8888 gm _ fontmgr_bounds_0.75_0 serialize-8888 gm _ fontmgr_bounds_1_-0.25 serialize-8888 gm _ fontmgr_bounds serialize-8888 gm _ fontmgr_match serialize-8888 gm _ fontmgr_iter serialize-8888 gm _ imagemasksubset serialize-8888 gm _ bitmapfilters serialize-8888 gm _ bitmapshaders serialize-8888 gm _ bleed serialize-8888 gm _ bleed_alpha_bmp serialize-8888 gm _ bleed_alpha_bmp_shader serialize-8888 gm _ convex_poly_clip serialize-8888 gm _ extractalpha serialize-8888 gm _ filterbitmap_checkerboard_32_32_g8 serialize-8888 gm _ filterbitmap_image_mandrill_64 serialize-8888 gm _ shadows serialize-8888 gm _ simpleaaclip_aaclip serialize-8888 gm _ composeshader_bitmap serialize-8888 gm _ scaled_tilemodes_npot serialize-8888 gm _ scaled_tilemodes serialize-8888 gm _ typefacerendering_pfaMac serialize-8888 gm _ parsedpaths serialize-8888 gm _ ImageGeneratorExternal_rect serialize-8888 gm _ ImageGeneratorExternal_shader serialize-8888 gm _ shadow_utils serialize-8888 gm _ makecolorspace serialize-8888 gm _ bleed_alpha_image serialize-8888 gm _ bleed_alpha_image_shader serialize-8888 gm _ verylargebitmap serialize-8888 gm _ verylarge_picture_image pic-8888 gm _ drawfilter pic-8888 gm _ image-cacherator-from-picture serialize-8888 gm _ image-cacherator-from-picture pic-8888 gm _ image-cacherator-from-raster serialize-8888 gm _ image-cacherator-from-raster pic-8888 gm _ image-cacherator-from-ctable serialize-8888 gm _ image-cacherator-from-ctable pic-8888 gm _ gamut serialize-8888 gm _ gamut pic-8888 gm _ complexclip4_bw serialize-8888 gm _ complexclip4_bw pic-8888 gm _ complexclip4_aa serialize-8888 gm _ complexclip4_aa tiles_rt-8888 gm _ complexclip4_bw tiles_rt-8888 gm _ complexclip4_aa --match ~CopySurface ~SRGBReadWritePixels --verbose; echo $? >/data/local/tmp/rc",
+      "set -x; /data/local/tmp/dm --resourcePath /sdcard/revenge_of_the_skiabot/resources --skps /sdcard/revenge_of_the_skiabot/skps --images /sdcard/revenge_of_the_skiabot/images/dm --colorImages /sdcard/revenge_of_the_skiabot/images/colorspace --nameByHash --properties gitHash abc123 builder Test-Android-Clang-Nexus10-CPU-Exynos5250-arm-Release-All-Android swarming_bot_id skia-bot-123 swarming_task_id 123456 --svgs /sdcard/revenge_of_the_skiabot/svgs --key arch arm compiler Clang configuration Release cpu_or_gpu CPU cpu_or_gpu_value Exynos5250 extra_config Android model Nexus10 os Android --uninterestingHashesFile /sdcard/revenge_of_the_skiabot/uninteresting_hashes.txt --writePath /sdcard/revenge_of_the_skiabot/dm_out --dont_write pdf --ignoreSigInt --nogpu --config 8888 srgb serialize-8888 tiles_rt-8888 pic-8888 --src tests gm image colorImage --blacklist _ test _ GrShape serialize-8888 gm _ bleed_image serialize-8888 gm _ c_gms serialize-8888 gm _ colortype serialize-8888 gm _ colortype_xfermodes serialize-8888 gm _ drawfilter serialize-8888 gm _ fontmgr_bounds_0.75_0 serialize-8888 gm _ fontmgr_bounds_1_-0.25 serialize-8888 gm _ fontmgr_bounds serialize-8888 gm _ fontmgr_match serialize-8888 gm _ fontmgr_iter serialize-8888 gm _ imagemasksubset serialize-8888 gm _ bitmapfilters serialize-8888 gm _ bitmapshaders serialize-8888 gm _ bleed serialize-8888 gm _ bleed_alpha_bmp serialize-8888 gm _ bleed_alpha_bmp_shader serialize-8888 gm _ convex_poly_clip serialize-8888 gm _ extractalpha serialize-8888 gm _ filterbitmap_checkerboard_32_32_g8 serialize-8888 gm _ filterbitmap_image_mandrill_64 serialize-8888 gm _ shadows serialize-8888 gm _ simpleaaclip_aaclip serialize-8888 gm _ composeshader_bitmap serialize-8888 gm _ scaled_tilemodes_npot serialize-8888 gm _ scaled_tilemodes serialize-8888 gm _ typefacerendering_pfaMac serialize-8888 gm _ parsedpaths serialize-8888 gm _ ImageGeneratorExternal_rect serialize-8888 gm _ ImageGeneratorExternal_shader serialize-8888 gm _ shadow_utils serialize-8888 gm _ all_bitmap_configs serialize-8888 gm _ makecolorspace serialize-8888 gm _ bleed_alpha_image serialize-8888 gm _ bleed_alpha_image_shader serialize-8888 gm _ verylargebitmap serialize-8888 gm _ verylarge_picture_image pic-8888 gm _ drawfilter pic-8888 gm _ image-cacherator-from-picture serialize-8888 gm _ image-cacherator-from-picture pic-8888 gm _ image-cacherator-from-raster serialize-8888 gm _ image-cacherator-from-raster pic-8888 gm _ image-cacherator-from-ctable serialize-8888 gm _ image-cacherator-from-ctable pic-8888 gm _ gamut serialize-8888 gm _ gamut pic-8888 gm _ complexclip4_bw serialize-8888 gm _ complexclip4_bw pic-8888 gm _ complexclip4_aa serialize-8888 gm _ complexclip4_aa tiles_rt-8888 gm _ complexclip4_bw tiles_rt-8888 gm _ complexclip4_aa --match ~CopySurface ~SRGBReadWritePixels --verbose; echo $? >/data/local/tmp/rc",
       "[START_DIR]/tmp/dm.sh"
     ],
     "env": {

infra/bots/recipes/test.expected/Test-Android-Clang-PixelC-CPU-TegraX1-arm64-Debug-All-Android.json

@@ -678,7 +678,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "set -x; /data/local/tmp/dm --resourcePath /sdcard/revenge_of_the_skiabot/resources --skps /sdcard/revenge_of_the_skiabot/skps --images /sdcard/revenge_of_the_skiabot/images/dm --colorImages /sdcard/revenge_of_the_skiabot/images/colorspace --nameByHash --properties gitHash abc123 builder Test-Android-Clang-PixelC-CPU-TegraX1-arm64-Debug-All-Android swarming_bot_id skia-bot-123 swarming_task_id 123456 --svgs /sdcard/revenge_of_the_skiabot/svgs --key arch arm64 compiler Clang configuration Debug cpu_or_gpu CPU cpu_or_gpu_value TegraX1 extra_config Android model PixelC os Android --uninterestingHashesFile /sdcard/revenge_of_the_skiabot/uninteresting_hashes.txt --writePath /sdcard/revenge_of_the_skiabot/dm_out --dont_write pdf --ignoreSigInt --nogpu --config 8888 srgb serialize-8888 tiles_rt-8888 pic-8888 --src tests gm image colorImage --gpuThreads 0 --blacklist _ test _ GrShape serialize-8888 gm _ bleed_image serialize-8888 gm _ c_gms serialize-8888 gm _ colortype serialize-8888 gm _ colortype_xfermodes serialize-8888 gm _ drawfilter serialize-8888 gm _ fontmgr_bounds_0.75_0 serialize-8888 gm _ fontmgr_bounds_1_-0.25 serialize-8888 gm _ fontmgr_bounds serialize-8888 gm _ fontmgr_match serialize-8888 gm _ fontmgr_iter serialize-8888 gm _ imagemasksubset serialize-8888 gm _ bitmapfilters serialize-8888 gm _ bitmapshaders serialize-8888 gm _ bleed serialize-8888 gm _ bleed_alpha_bmp serialize-8888 gm _ bleed_alpha_bmp_shader serialize-8888 gm _ convex_poly_clip serialize-8888 gm _ extractalpha serialize-8888 gm _ filterbitmap_checkerboard_32_32_g8 serialize-8888 gm _ filterbitmap_image_mandrill_64 serialize-8888 gm _ shadows serialize-8888 gm _ simpleaaclip_aaclip serialize-8888 gm _ composeshader_bitmap serialize-8888 gm _ scaled_tilemodes_npot serialize-8888 gm _ scaled_tilemodes serialize-8888 gm _ typefacerendering_pfaMac serialize-8888 gm _ parsedpaths serialize-8888 gm _ ImageGeneratorExternal_rect serialize-8888 gm _ ImageGeneratorExternal_shader serialize-8888 gm _ shadow_utils serialize-8888 gm _ makecolorspace serialize-8888 gm _ bleed_alpha_image serialize-8888 gm _ bleed_alpha_image_shader serialize-8888 gm _ verylargebitmap serialize-8888 gm _ verylarge_picture_image pic-8888 gm _ drawfilter pic-8888 gm _ image-cacherator-from-picture serialize-8888 gm _ image-cacherator-from-picture pic-8888 gm _ image-cacherator-from-raster serialize-8888 gm _ image-cacherator-from-raster pic-8888 gm _ image-cacherator-from-ctable serialize-8888 gm _ image-cacherator-from-ctable pic-8888 gm _ gamut serialize-8888 gm _ gamut pic-8888 gm _ complexclip4_bw serialize-8888 gm _ complexclip4_bw pic-8888 gm _ complexclip4_aa serialize-8888 gm _ complexclip4_aa tiles_rt-8888 gm _ complexclip4_bw tiles_rt-8888 gm _ complexclip4_aa --verbose; echo $? >/data/local/tmp/rc",
+      "set -x; /data/local/tmp/dm --resourcePath /sdcard/revenge_of_the_skiabot/resources --skps /sdcard/revenge_of_the_skiabot/skps --images /sdcard/revenge_of_the_skiabot/images/dm --colorImages /sdcard/revenge_of_the_skiabot/images/colorspace --nameByHash --properties gitHash abc123 builder Test-Android-Clang-PixelC-CPU-TegraX1-arm64-Debug-All-Android swarming_bot_id skia-bot-123 swarming_task_id 123456 --svgs /sdcard/revenge_of_the_skiabot/svgs --key arch arm64 compiler Clang configuration Debug cpu_or_gpu CPU cpu_or_gpu_value TegraX1 extra_config Android model PixelC os Android --uninterestingHashesFile /sdcard/revenge_of_the_skiabot/uninteresting_hashes.txt --writePath /sdcard/revenge_of_the_skiabot/dm_out --dont_write pdf --ignoreSigInt --nogpu --config 8888 srgb serialize-8888 tiles_rt-8888 pic-8888 --src tests gm image colorImage --gpuThreads 0 --blacklist _ test _ GrShape serialize-8888 gm _ bleed_image serialize-8888 gm _ c_gms serialize-8888 gm _ colortype serialize-8888 gm _ colortype_xfermodes serialize-8888 gm _ drawfilter serialize-8888 gm _ fontmgr_bounds_0.75_0 serialize-8888 gm _ fontmgr_bounds_1_-0.25 serialize-8888 gm _ fontmgr_bounds serialize-8888 gm _ fontmgr_match serialize-8888 gm _ fontmgr_iter serialize-8888 gm _ imagemasksubset serialize-8888 gm _ bitmapfilters serialize-8888 gm _ bitmapshaders serialize-8888 gm _ bleed serialize-8888 gm _ bleed_alpha_bmp serialize-8888 gm _ bleed_alpha_bmp_shader serialize-8888 gm _ convex_poly_clip serialize-8888 gm _ extractalpha serialize-8888 gm _ filterbitmap_checkerboard_32_32_g8 serialize-8888 gm _ filterbitmap_image_mandrill_64 serialize-8888 gm _ shadows serialize-8888 gm _ simpleaaclip_aaclip serialize-8888 gm _ composeshader_bitmap serialize-8888 gm _ scaled_tilemodes_npot serialize-8888 gm _ scaled_tilemodes serialize-8888 gm _ typefacerendering_pfaMac serialize-8888 gm _ parsedpaths serialize-8888 gm _ ImageGeneratorExternal_rect serialize-8888 gm _ ImageGeneratorExternal_shader serialize-8888 gm _ shadow_utils serialize-8888 gm _ all_bitmap_configs serialize-8888 gm _ makecolorspace serialize-8888 gm _ bleed_alpha_image serialize-8888 gm _ bleed_alpha_image_shader serialize-8888 gm _ verylargebitmap serialize-8888 gm _ verylarge_picture_image pic-8888 gm _ drawfilter pic-8888 gm _ image-cacherator-from-picture serialize-8888 gm _ image-cacherator-from-picture pic-8888 gm _ image-cacherator-from-raster serialize-8888 gm _ image-cacherator-from-raster pic-8888 gm _ image-cacherator-from-ctable serialize-8888 gm _ image-cacherator-from-ctable pic-8888 gm _ gamut serialize-8888 gm _ gamut pic-8888 gm _ complexclip4_bw serialize-8888 gm _ complexclip4_bw pic-8888 gm _ complexclip4_aa serialize-8888 gm _ complexclip4_aa tiles_rt-8888 gm _ complexclip4_bw tiles_rt-8888 gm _ complexclip4_aa --verbose; echo $? >/data/local/tmp/rc",
       "[START_DIR]/tmp/dm.sh"
     ],
     "env": {

infra/bots/recipes/test.expected/Test-Debian9-Clang-GCE-CPU-AVX2-x86_64-Debug-All-ASAN.json

@@ -318,6 +318,10 @@
       "serialize-8888",
       "gm",
       "_",
+      "all_bitmap_configs",
+      "serialize-8888",
+      "gm",
+      "_",
       "makecolorspace",
       "serialize-8888",
       "gm",

infra/bots/recipes/test.expected/Test-Debian9-Clang-GCE-CPU-AVX2-x86_64-Debug-All-MSAN.json

@@ -312,6 +312,10 @@
       "serialize-8888",
       "gm",
       "_",
+      "all_bitmap_configs",
+      "serialize-8888",
+      "gm",
+      "_",
       "makecolorspace",
       "serialize-8888",
       "gm",

infra/bots/recipes/test.expected/Test-Debian9-Clang-GCE-CPU-AVX2-x86_64-Debug-All-SK_USE_DISCARDABLE_SCALEDIMAGECACHE.json

@@ -384,6 +384,10 @@
       "serialize-8888",
       "gm",
       "_",
+      "all_bitmap_configs",
+      "serialize-8888",
+      "gm",
+      "_",
       "makecolorspace",
       "serialize-8888",
       "gm",

infra/bots/recipes/test.expected/Test-Debian9-Clang-GCE-CPU-AVX2-x86_64-Debug-All-UBSAN_float_cast_overflow.json

@@ -313,6 +313,10 @@
       "serialize-8888",
       "gm",
       "_",
+      "all_bitmap_configs",
+      "serialize-8888",
+      "gm",
+      "_",
       "makecolorspace",
       "serialize-8888",
       "gm",

infra/bots/recipes/test.expected/Test-Debian9-Clang-GCE-CPU-AVX2-x86_64-Debug-shard_00_10-Coverage.json

@@ -318,6 +318,10 @@
       "serialize-8888",
       "gm",
       "_",
+      "all_bitmap_configs",
+      "serialize-8888",
+      "gm",
+      "_",
       "makecolorspace",
       "serialize-8888",
       "gm",

infra/bots/recipes/test.expected/Test-Debian9-Clang-GCE-CPU-AVX2-x86_64-Release-All-TSAN.json

@@ -313,6 +313,10 @@
       "serialize-8888",
       "gm",
       "_",
+      "all_bitmap_configs",
+      "serialize-8888",
+      "gm",
+      "_",
       "makecolorspace",
       "serialize-8888",
       "gm",

infra/bots/recipes/test.expected/Test-Debian9-GCC-GCE-CPU-AVX2-x86-Debug-All.json

@@ -382,6 +382,10 @@
       "serialize-8888",
       "gm",
       "_",
+      "all_bitmap_configs",
+      "serialize-8888",
+      "gm",
+      "_",
       "makecolorspace",
       "serialize-8888",
       "gm",

infra/bots/recipes/test.expected/Test-Debian9-GCC-GCE-CPU-AVX2-x86_64-Debug-All.json

@@ -380,6 +380,10 @@
       "serialize-8888",
       "gm",
       "_",
+      "all_bitmap_configs",
+      "serialize-8888",
+      "gm",
+      "_",
       "makecolorspace",
       "serialize-8888",
       "gm",

infra/bots/recipes/test.expected/Test-Mac-Clang-MacMini7.1-CPU-AVX-x86_64-Release-All.json

@@ -461,6 +461,10 @@
       "serialize-8888",
       "gm",
       "_",
+      "all_bitmap_configs",
+      "serialize-8888",
+      "gm",
+      "_",
       "makecolorspace",
       "pic-8888",
       "gm",

infra/bots/recipes/test.expected/Test-Win8-MSVC-Golo-CPU-AVX-x86-Debug-All.json

@@ -407,6 +407,10 @@
       "serialize-8888",
       "gm",
       "_",
+      "all_bitmap_configs",
+      "serialize-8888",
+      "gm",
+      "_",
       "makecolorspace",
       "serialize-8888",
       "gm",

infra/bots/recipes/test.expected/failed_dm.json

@@ -380,6 +380,10 @@
       "serialize-8888",
       "gm",
       "_",
+      "all_bitmap_configs",
+      "serialize-8888",
+      "gm",
+      "_",
       "makecolorspace",
       "serialize-8888",
       "gm",

infra/bots/recipes/test.expected/trybot.json

@@ -433,6 +433,10 @@
       "serialize-8888",
       "gm",
       "_",
+      "all_bitmap_configs",
+      "serialize-8888",
+      "gm",
+      "_",
       "makecolorspace",
       "serialize-8888",
       "gm",

infra/bots/recipes/test.py

@@ -403,6 +403,7 @@ def dm_flags(api, bot):
   bad_serialize_gms.append('shadow_utils')
 
   # Not expected to round trip encoding/decoding.
+  bad_serialize_gms.append('all_bitmap_configs')
   bad_serialize_gms.append('makecolorspace')
 
   for test in bad_serialize_gms:

src/jumper/SkJumper.cpp

@@ -213,8 +213,8 @@ extern "C" {
 
     NOPE(callback)
     LOWP(move_src_dst) LOWP(move_dst_src)
-    NOPE(clamp_0) NOPE(clamp_1) TODO(clamp_a) TODO(clamp_a_dst)
-    NOPE(unpremul) LOWP(premul) TODO(premul_dst)
+    NOPE(clamp_0) NOPE(clamp_1) LOWP(clamp_a) LOWP(clamp_a_dst)
+    NOPE(unpremul) LOWP(premul) LOWP(premul_dst)
     LOWP(set_rgb) LOWP(swap_rb) LOWP(invert)
     NOPE(from_srgb) NOPE(from_srgb_dst) NOPE(to_srgb)
     LOWP(black_color) LOWP(white_color) LOWP(uniform_color)
@@ -222,7 +222,7 @@ extern "C" {
     LOWP(load_a8)   LOWP(load_a8_dst)   LOWP(store_a8)   LOWP(gather_a8)
     LOWP(load_g8)   LOWP(load_g8_dst)                    LOWP(gather_g8)
     LOWP(load_565)  LOWP(load_565_dst)  LOWP(store_565)  LOWP(gather_565)
-    TODO(load_4444) TODO(load_4444_dst) TODO(store_4444) TODO(gather_4444)
+    LOWP(load_4444) LOWP(load_4444_dst) LOWP(store_4444) LOWP(gather_4444)
     NOPE(load_f16)  NOPE(load_f16_dst)  NOPE(store_f16)  NOPE(gather_f16)
     NOPE(load_f32)  NOPE(load_f32_dst)  NOPE(store_f32)
     LOWP(load_8888) LOWP(load_8888_dst) LOWP(store_8888) LOWP(gather_8888)

src/jumper/SkJumper_stages_lowp.cpp

@@ -260,11 +260,27 @@ STAGE_PP(set_rgb, const float rgb[3]) {
     b = from_float(rgb[2]);
 }
 
+STAGE_PP(clamp_a, Ctx::None) {
+    r = min(r, a);
+    g = min(g, a);
+    b = min(b, a);
+}
+STAGE_PP(clamp_a_dst, Ctx::None) {
+    dr = min(dr, da);
+    dg = min(dg, da);
+    db = min(db, da);
+}
+
 STAGE_PP(premul, Ctx::None) {
     r = div255(r * a);
     g = div255(g * a);
     b = div255(b * a);
 }
+STAGE_PP(premul_dst, Ctx::None) {
+    dr = div255(dr * da);
+    dg = div255(dg * da);
+    db = div255(db * da);
+}
 
 STAGE_PP(swap_rb, Ctx::None) {
     auto tmp = r;
@@ -580,6 +596,50 @@ STAGE_GP(gather_565, const SkJumper_GatherCtx* ctx) {
     a = 255;
 }
 
+SI void from_4444(U16 rgba, U16* r, U16* g, U16* b, U16* a) {
+    // Format for 4444 buffers: 15|rrrr gggg bbbb aaaa|0.
+    U16 R = (rgba >> 12) & 15,
+        G = (rgba >>  8) & 15,
+        B = (rgba >>  4) & 15,
+        A = (rgba >>  0) & 15;
+
+    // Scale [0,15] to [0,255].
+    *r = (R << 4) | R;
+    *g = (G << 4) | G;
+    *b = (B << 4) | B;
+    *a = (A << 4) | A;
+}
+SI void load_4444(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b, U16* a) {
+    from_4444(load<U16>(ptr, tail), r,g,b,a);
+}
+SI void store_4444(uint16_t* ptr, size_t tail, U16 r, U16 g, U16 b, U16 a) {
+    // Select the top 4 bits of each.
+    U16 R = r >> 4,
+        G = g >> 4,
+        B = b >> 4,
+        A = a >> 4;
+    // Pack them back into 15|rrrr gggg bbbb aaaa|0.
+    store(ptr, tail, R << 12
+                   | G <<  8
+                   | B <<  4
+                   | A <<  0);
+}
+
+STAGE_PP(load_4444, const SkJumper_MemoryCtx* ctx) {
+    load_4444(ptr_at_xy<const uint16_t>(ctx, dx,dy), tail, &r,&g,&b,&a);
+}
+STAGE_PP(load_4444_dst, const SkJumper_MemoryCtx* ctx) {
+    load_4444(ptr_at_xy<const uint16_t>(ctx, dx,dy), tail, &dr,&dg,&db,&da);
+}
+STAGE_PP(store_4444, const SkJumper_MemoryCtx* ctx) {
+    store_4444(ptr_at_xy<uint16_t>(ctx, dx,dy), tail, r,g,b,a);
+}
+STAGE_GP(gather_4444, const SkJumper_GatherCtx* ctx) {
+    const uint16_t* ptr;
+    U32 ix = ix_and_ptr(&ptr, ctx, x,y);
+    from_4444(gather<U16>(ptr, ix), &r,&g,&b,&a);
+}
+
 // ~~~~~~ 8-bit memory loads and stores ~~~~~~ //
 
 SI U16 load_8(const uint8_t* ptr, size_t tail) {