diff --git a/src/splicer/SkSplicer.cpp b/src/splicer/SkSplicer.cpp
index 0295c4f..57ce670 100644
--- a/src/splicer/SkSplicer.cpp
+++ b/src/splicer/SkSplicer.cpp
@@ -16,10 +16,12 @@
 #endif
 
 #include "SkSplicer_generated.h"
+#include "SkSplicer_generated_lowp.h"
 #include "SkSplicer_shared.h"
 
 // Uncomment to dump output JIT'd pipeline.
 //#define DUMP "/tmp/dump.bin"
+//#define DUMP "/data/local/tmp/dump.bin"
 //
 // On x86, we'll include IACA markers too.
 //   https://software.intel.com/en-us/articles/intel-architecture-code-analyzer
@@ -27,10 +29,10 @@
 //   $ ./iaca.sh -arch HSW -64 -mark 0 /tmp/dump.bin | less
 //
 // To disassemble an aarch64 dump,
-//   $ gobjdump -b binary -D dump.bin -m aarch64
+//   $ adb pull /data/local/tmp/dump.bin; gobjdump -b binary -D dump.bin -m aarch64 | less
 //
 // To disassemble an armv7 dump,
-//   $ gobjdump -b binary -D dump.bin -m arm
+//   $ adb pull /data/local/tmp/dump.bin; gobjdump -b binary -D dump.bin -m arm | less
 
 namespace {
 
@@ -41,11 +43,18 @@
         0.0025f, 0.6975f, 0.3000f, 1/12.92f, 0.055f,       // from_srgb
         12.46f, 0.411192f, 0.689206f, -0.0988f, 0.0043f,   //   to_srgb
     };
+    static const SkSplicer_constants_lowp kConstants_lowp = {
+        0x0001, 0x8000,
+    };
 
     // We do this a lot, so it's nice to infer the correct size.  Works fine with arrays.
     template <typename T>
     static void splice(SkWStream* buf, const T& val) {
-        buf->write(&val, sizeof(val));
+        // This null check makes determining whether we can drop to lowp easier.
+        // It's always known at compile time..
+        if (buf) {
+            buf->write(&val, sizeof(val));
+        }
     }
 
 #if defined(__aarch64__)
@@ -59,7 +68,6 @@
         splice(buf, 0xf2800000 | (parts[0] << 5) | 0x2);  // merge 16-bit intermediate <<  0 into x2
     }
     static void loop(SkWStream* buf, int loop_start) {
-        splice(buf, 0x91001000);        // add x0, x0, #4
         splice(buf, 0xeb01001f);        // cmp x0, x1
         int off = loop_start - (int)buf->bytesWritten();
         off /= 4;   // bytes -> instructions, still signed
@@ -81,7 +89,6 @@
         splice(buf, 0xe3402000 | encode(parts[1]));  // movt r2,    <top 16 bits>
     }
     static void loop(SkWStream* buf, int loop_start) {
-        splice(buf, 0xe2800002);  // add r0, r0, #2
         splice(buf, 0xe1500001);  // cmp r0, r1
         int off = loop_start - ((int)buf->bytesWritten() + 8 /*ARM is weird*/);
         off /= 4;   // bytes -> instructions, still signed
@@ -99,10 +106,8 @@
         splice(buf, ctx);
     }
     static void loop(SkWStream* buf, int loop_start) {
-        static const uint8_t  addq_8_rdi[] = { 0x48, 0x83, 0xc7, 0x08 };
         static const uint8_t cmp_rsi_rdi[] = { 0x48, 0x39, 0xf7 };
         static const uint8_t     jb_near[] = { 0x0f, 0x8c };
-        splice(buf, addq_8_rdi);   // addq $8, %rdi
         splice(buf, cmp_rsi_rdi);  // cmp %rsi, %rdi
         splice(buf, jb_near);      // jb <next 4 bytes>  (b == "before", unsigned less than)
         splice(buf, loop_start - (int)(buf->bytesWritten() + 4));
@@ -236,12 +241,64 @@
     }
 #endif
 
+    static bool splice_lowp(SkWStream* buf, SkRasterPipeline::StockStage st) {
+        switch (st) {
+            default: return false;
+            case SkRasterPipeline::clamp_0: break;  // lowp can't go below 0.
+        #define CASE(st) case SkRasterPipeline::st: splice(buf, kSplice_##st##_lowp); break
+            CASE(clear);
+            CASE(plus_);
+            CASE(srcover);
+            CASE(dstover);
+            CASE(clamp_1);
+            CASE(clamp_a);
+            CASE(swap);
+            CASE(move_src_dst);
+            CASE(move_dst_src);
+            CASE(premul);
+            CASE(load_8888);
+            CASE(store_8888);
+        #undef CASE
+        }
+        return true;
+    }
+
+    static bool splice_highp(SkWStream* buf, SkRasterPipeline::StockStage st) {
+        switch (st) {
+            default: return false;
+        #define CASE(st) case SkRasterPipeline::st: splice(buf, kSplice_##st); break
+            CASE(clear);
+            CASE(plus_);
+            CASE(srcover);
+            CASE(dstover);
+            CASE(clamp_0);
+            CASE(clamp_1);
+            CASE(clamp_a);
+            CASE(swap);
+            CASE(move_src_dst);
+            CASE(move_dst_src);
+            CASE(premul);
+            CASE(unpremul);
+            CASE(from_srgb);
+            CASE(to_srgb);
+            CASE(scale_u8);
+            CASE(load_tables);
+            CASE(load_8888);
+            CASE(store_8888);
+            CASE(load_f16);
+            CASE(store_f16);
+            CASE(matrix_3x4);
+        #undef CASE
+        }
+        return true;
+    }
+
     struct Spliced {
 
         Spliced(const SkRasterPipeline::Stage* stages, int nstages) {
             // We always create a backup interpreter pipeline,
             //   - to handle any program we can't, and
-            //   - to handle the n < kStride tails.
+            //   - to handle the n < stride tails.
             fBackup     = SkOpts::compile_pipeline(stages, nstages);
             fSplicedLen = 0;
             fSpliced    = nullptr;
@@ -260,12 +317,23 @@
             }
         #endif
 
+            // See if all the stages can run in lowp mode.  If so, we can run at ~2x speed.
+            bool lowp = true;
+            for (int i = 0; i < nstages; i++) {
+                if (!splice_lowp(nullptr, stages[i].stage)) {
+                    //SkDebugf("SkSplicer can't yet handle stage %d in lowp.\n", stages[i].stage);
+                    lowp = false;
+                    break;
+                }
+            }
+            fLowp = lowp;
+
             SkDynamicMemoryWStream buf;
 
             // Our loop is the equivalent of this C++ code:
             //    do {
             //        ... run spliced stages...
-            //        x += kStride;
+            //        x += stride;
             //    } while(x < limit);
             before_loop(&buf);
             auto loop_start = buf.bytesWritten();  // Think of this like a label, loop_start:
@@ -277,36 +345,18 @@
                 }
 
                 // Splice in the code for the Stages, generated offline into SkSplicer_generated.h.
-                switch(stages[i].stage) {
-                    case SkRasterPipeline::clear:        splice(&buf, kSplice_clear       ); break;
-                    case SkRasterPipeline::plus_:        splice(&buf, kSplice_plus        ); break;
-                    case SkRasterPipeline::srcover:      splice(&buf, kSplice_srcover     ); break;
-                    case SkRasterPipeline::dstover:      splice(&buf, kSplice_dstover     ); break;
-                    case SkRasterPipeline::clamp_0:      splice(&buf, kSplice_clamp_0     ); break;
-                    case SkRasterPipeline::clamp_1:      splice(&buf, kSplice_clamp_1     ); break;
-                    case SkRasterPipeline::clamp_a:      splice(&buf, kSplice_clamp_a     ); break;
-                    case SkRasterPipeline::swap:         splice(&buf, kSplice_swap        ); break;
-                    case SkRasterPipeline::move_src_dst: splice(&buf, kSplice_move_src_dst); break;
-                    case SkRasterPipeline::move_dst_src: splice(&buf, kSplice_move_dst_src); break;
-                    case SkRasterPipeline::premul:       splice(&buf, kSplice_premul      ); break;
-                    case SkRasterPipeline::unpremul:     splice(&buf, kSplice_unpremul    ); break;
-                    case SkRasterPipeline::from_srgb:    splice(&buf, kSplice_from_srgb   ); break;
-                    case SkRasterPipeline::to_srgb:      splice(&buf, kSplice_to_srgb     ); break;
-                    case SkRasterPipeline::scale_u8:     splice(&buf, kSplice_scale_u8    ); break;
-                    case SkRasterPipeline::load_tables:  splice(&buf, kSplice_load_tables ); break;
-                    case SkRasterPipeline::load_8888:    splice(&buf, kSplice_load_8888   ); break;
-                    case SkRasterPipeline::store_8888:   splice(&buf, kSplice_store_8888  ); break;
-                    case SkRasterPipeline::load_f16:     splice(&buf, kSplice_load_f16    ); break;
-                    case SkRasterPipeline::store_f16:    splice(&buf, kSplice_store_f16   ); break;
-                    case SkRasterPipeline::matrix_3x4:   splice(&buf, kSplice_matrix_3x4  ); break;
-
-                    // No joy (probably just not yet implemented).
-                    default:
-                        //SkDebugf("SkSplicer can't yet handle stage %d.\n", stages[i].stage);
-                        return;
+                if (lowp) {
+                    SkAssertResult(splice_lowp(&buf, stages[i].stage));
+                    continue;
+                }
+                if (!splice_highp(&buf, stages[i].stage)) {
+                    //SkDebugf("SkSplicer can't yet handle stage %d.\n", stages[i].stage);
+                    return;
                 }
             }
 
+            lowp ? splice(&buf, kSplice_inc_x_lowp)
+                 : splice(&buf, kSplice_inc_x);
             loop(&buf, loop_start);  // Loop back to handle more pixels if not done.
             after_loop(&buf);
             ret(&buf);  // We're done.
@@ -323,7 +373,8 @@
         // Spliced is stored in a std::function, so it needs to be copyable.
         Spliced(const Spliced& o) : fBackup    (o.fBackup)
                                   , fSplicedLen(o.fSplicedLen)
-                                  , fSpliced   (copy_to_executable_mem(o.fSpliced, &fSplicedLen)) {}
+                                  , fSpliced   (copy_to_executable_mem(o.fSpliced, &fSplicedLen))
+                                  , fLowp      (o.fLowp) {}
 
         ~Spliced() {
             cleanup_executable_mem(fSpliced, fSplicedLen);
@@ -331,13 +382,17 @@
 
         // Here's where we call fSpliced if we created it, fBackup if not.
         void operator()(size_t x, size_t y, size_t n) const {
-            size_t body = n/kStride*kStride;   // Largest multiple of kStride (4 or 8) <= n.
-            if (fSpliced && body) {            // Can we run fSpliced for at least one kStride?
+            size_t stride = fLowp ? kStride*2
+                                  : kStride;
+            size_t body = n/stride*stride;     // Largest multiple of stride (2, 4, 8, or 16) <= n.
+            if (fSpliced && body) {            // Can we run fSpliced for at least one stride?
                 // TODO: At some point we will want to pass in y...
-                using Fn = void(size_t x, size_t limit, void* ctx, const SkSplicer_constants* k);
-                ((Fn*)fSpliced)(x, x+body, nullptr, &kConstants);
+                using Fn = void(size_t x, size_t limit, void* ctx, const void* k);
+                auto k = fLowp ? (const void*)&kConstants_lowp
+                               : (const void*)&kConstants;
+                ((Fn*)fSpliced)(x, x+body, nullptr, k);
 
-                // Fall through to fBackup for any n<kStride last pixels.
+                // Fall through to fBackup for any n<stride last pixels.
                 x += body;
                 n -= body;
             }
@@ -347,6 +402,7 @@
         std::function<void(size_t, size_t, size_t)> fBackup;
         size_t                                      fSplicedLen;
         void*                                       fSpliced;
+        bool                                        fLowp;
     };
 
 }
diff --git a/src/splicer/SkSplicer_generated.h b/src/splicer/SkSplicer_generated.h
index e08c428..8549247 100644
--- a/src/splicer/SkSplicer_generated.h
+++ b/src/splicer/SkSplicer_generated.h
@@ -9,17 +9,20 @@
 #define SkSplicer_generated_DEFINED
 
 // This file is generated semi-automatically with this command:
-//   $ src/splicer/build_stages.py > src/splicer/SkSplicer_generated.h
+//   $ src/splicer/build_stages.py
 
 #if defined(__aarch64__)
 
+static const unsigned int kSplice_inc_x[] = {
+    0x91001000,                                 //  add           x0, x0, #0x4
+};
 static const unsigned int kSplice_clear[] = {
     0x6f00e400,                                 //  movi          v0.2d, #0x0
     0x6f00e401,                                 //  movi          v1.2d, #0x0
     0x6f00e402,                                 //  movi          v2.2d, #0x0
     0x6f00e403,                                 //  movi          v3.2d, #0x0
 };
-static const unsigned int kSplice_plus[] = {
+static const unsigned int kSplice_plus_[] = {
     0x4e24d400,                                 //  fadd          v0.4s, v0.4s, v4.4s
     0x4e25d421,                                 //  fadd          v1.4s, v1.4s, v5.4s
     0x4e26d442,                                 //  fadd          v2.4s, v2.4s, v6.4s
@@ -363,13 +366,16 @@
 
 #elif defined(__ARM_NEON__)
 
+static const unsigned int kSplice_inc_x[] = {
+    0xe2800002,                                 //  add           r0, r0, #2
+};
 static const unsigned int kSplice_clear[] = {
     0xf2800010,                                 //  vmov.i32      d0, #0
     0xf2801010,                                 //  vmov.i32      d1, #0
     0xf2802010,                                 //  vmov.i32      d2, #0
     0xf2803010,                                 //  vmov.i32      d3, #0
 };
-static const unsigned int kSplice_plus[] = {
+static const unsigned int kSplice_plus_[] = {
     0xf2000d04,                                 //  vadd.f32      d0, d0, d4
     0xf2011d05,                                 //  vadd.f32      d1, d1, d5
     0xf2022d06,                                 //  vadd.f32      d2, d2, d6
@@ -738,13 +744,16 @@
 
 #else
 
+static const unsigned char kSplice_inc_x[] = {
+    0x48,0x83,0xc7,0x08,                        //  add           $0x8,%rdi
+};
 static const unsigned char kSplice_clear[] = {
     0xc5,0xfc,0x57,0xc0,                        //  vxorps        %ymm0,%ymm0,%ymm0
     0xc5,0xf4,0x57,0xc9,                        //  vxorps        %ymm1,%ymm1,%ymm1
     0xc5,0xec,0x57,0xd2,                        //  vxorps        %ymm2,%ymm2,%ymm2
     0xc5,0xe4,0x57,0xdb,                        //  vxorps        %ymm3,%ymm3,%ymm3
 };
-static const unsigned char kSplice_plus[] = {
+static const unsigned char kSplice_plus_[] = {
     0xc5,0xfc,0x58,0xc4,                        //  vaddps        %ymm4,%ymm0,%ymm0
     0xc5,0xf4,0x58,0xcd,                        //  vaddps        %ymm5,%ymm1,%ymm1
     0xc5,0xec,0x58,0xd6,                        //  vaddps        %ymm6,%ymm2,%ymm2
diff --git a/src/splicer/SkSplicer_generated_lowp.h b/src/splicer/SkSplicer_generated_lowp.h
new file mode 100644
index 0000000..8e2796e
--- /dev/null
+++ b/src/splicer/SkSplicer_generated_lowp.h
@@ -0,0 +1,499 @@
+/*
+ * Copyright 2017 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkSplicer_generated_lowp_DEFINED
+#define SkSplicer_generated_lowp_DEFINED
+
+// This file is generated semi-automatically with this command:
+//   $ src/splicer/build_stages.py
+
+#if defined(__aarch64__)
+
+static const unsigned int kSplice_inc_x_lowp[] = {
+    0x91002000,                                 //  add           x0, x0, #0x8
+};
+static const unsigned int kSplice_clear_lowp[] = {
+    0x6f00e400,                                 //  movi          v0.2d, #0x0
+    0x6f00e401,                                 //  movi          v1.2d, #0x0
+    0x6f00e402,                                 //  movi          v2.2d, #0x0
+    0x6f00e403,                                 //  movi          v3.2d, #0x0
+};
+static const unsigned int kSplice_plus__lowp[] = {
+    0x6e640c00,                                 //  uqadd         v0.8h, v0.8h, v4.8h
+    0x6e650c21,                                 //  uqadd         v1.8h, v1.8h, v5.8h
+    0x6e660c42,                                 //  uqadd         v2.8h, v2.8h, v6.8h
+    0x6e670c63,                                 //  uqadd         v3.8h, v3.8h, v7.8h
+};
+static const unsigned int kSplice_srcover_lowp[] = {
+    0x91000868,                                 //  add           x8, x3, #0x2
+    0x4d40c510,                                 //  ld1r          {v16.8h}, [x8]
+    0x6e632e10,                                 //  uqsub         v16.8h, v16.8h, v3.8h
+    0x6e70b491,                                 //  sqrdmulh      v17.8h, v4.8h, v16.8h
+    0x4e241e12,                                 //  and           v18.16b, v16.16b, v4.16b
+    0x6e70b4b3,                                 //  sqrdmulh      v19.8h, v5.8h, v16.8h
+    0x4e60ba31,                                 //  abs           v17.8h, v17.8h
+    0x4e251e14,                                 //  and           v20.16b, v16.16b, v5.16b
+    0x6f111651,                                 //  usra          v17.8h, v18.8h, #15
+    0x6e70b4d2,                                 //  sqrdmulh      v18.8h, v6.8h, v16.8h
+    0x4e60ba73,                                 //  abs           v19.8h, v19.8h
+    0x6f111693,                                 //  usra          v19.8h, v20.8h, #15
+    0x4e261e14,                                 //  and           v20.16b, v16.16b, v6.16b
+    0x4e60ba52,                                 //  abs           v18.8h, v18.8h
+    0x6f111692,                                 //  usra          v18.8h, v20.8h, #15
+    0x6e70b4f4,                                 //  sqrdmulh      v20.8h, v7.8h, v16.8h
+    0x4e271e10,                                 //  and           v16.16b, v16.16b, v7.16b
+    0x4e60ba94,                                 //  abs           v20.8h, v20.8h
+    0x6f111614,                                 //  usra          v20.8h, v16.8h, #15
+    0x6e600e20,                                 //  uqadd         v0.8h, v17.8h, v0.8h
+    0x6e610e61,                                 //  uqadd         v1.8h, v19.8h, v1.8h
+    0x6e620e42,                                 //  uqadd         v2.8h, v18.8h, v2.8h
+    0x6e630e83,                                 //  uqadd         v3.8h, v20.8h, v3.8h
+};
+static const unsigned int kSplice_dstover_lowp[] = {
+    0x91000868,                                 //  add           x8, x3, #0x2
+    0x4d40c510,                                 //  ld1r          {v16.8h}, [x8]
+    0x6e672e10,                                 //  uqsub         v16.8h, v16.8h, v7.8h
+    0x6e70b411,                                 //  sqrdmulh      v17.8h, v0.8h, v16.8h
+    0x4e201e12,                                 //  and           v18.16b, v16.16b, v0.16b
+    0x6e70b433,                                 //  sqrdmulh      v19.8h, v1.8h, v16.8h
+    0x4e60ba31,                                 //  abs           v17.8h, v17.8h
+    0x4e211e14,                                 //  and           v20.16b, v16.16b, v1.16b
+    0x6f111651,                                 //  usra          v17.8h, v18.8h, #15
+    0x6e70b452,                                 //  sqrdmulh      v18.8h, v2.8h, v16.8h
+    0x4e60ba73,                                 //  abs           v19.8h, v19.8h
+    0x6f111693,                                 //  usra          v19.8h, v20.8h, #15
+    0x4e221e14,                                 //  and           v20.16b, v16.16b, v2.16b
+    0x4e60ba52,                                 //  abs           v18.8h, v18.8h
+    0x6f111692,                                 //  usra          v18.8h, v20.8h, #15
+    0x6e70b474,                                 //  sqrdmulh      v20.8h, v3.8h, v16.8h
+    0x4e231e10,                                 //  and           v16.16b, v16.16b, v3.16b
+    0x4e60ba94,                                 //  abs           v20.8h, v20.8h
+    0x6f111614,                                 //  usra          v20.8h, v16.8h, #15
+    0x6e640e24,                                 //  uqadd         v4.8h, v17.8h, v4.8h
+    0x6e650e65,                                 //  uqadd         v5.8h, v19.8h, v5.8h
+    0x6e660e46,                                 //  uqadd         v6.8h, v18.8h, v6.8h
+    0x6e670e87,                                 //  uqadd         v7.8h, v20.8h, v7.8h
+};
+static const unsigned int kSplice_clamp_1_lowp[] = {
+    0x91000868,                                 //  add           x8, x3, #0x2
+    0x4d40c510,                                 //  ld1r          {v16.8h}, [x8]
+    0x6e706c00,                                 //  umin          v0.8h, v0.8h, v16.8h
+    0x6e706c21,                                 //  umin          v1.8h, v1.8h, v16.8h
+    0x6e706c42,                                 //  umin          v2.8h, v2.8h, v16.8h
+    0x6e706c63,                                 //  umin          v3.8h, v3.8h, v16.8h
+};
+static const unsigned int kSplice_clamp_a_lowp[] = {
+    0x91000868,                                 //  add           x8, x3, #0x2
+    0x4d40c510,                                 //  ld1r          {v16.8h}, [x8]
+    0x6e706c63,                                 //  umin          v3.8h, v3.8h, v16.8h
+    0x6e636c00,                                 //  umin          v0.8h, v0.8h, v3.8h
+    0x6e636c21,                                 //  umin          v1.8h, v1.8h, v3.8h
+    0x6e636c42,                                 //  umin          v2.8h, v2.8h, v3.8h
+};
+static const unsigned int kSplice_swap_lowp[] = {
+    0x4ea31c70,                                 //  mov           v16.16b, v3.16b
+    0x4ea21c51,                                 //  mov           v17.16b, v2.16b
+    0x4ea11c32,                                 //  mov           v18.16b, v1.16b
+    0x4ea01c13,                                 //  mov           v19.16b, v0.16b
+    0x4ea41c80,                                 //  mov           v0.16b, v4.16b
+    0x4ea51ca1,                                 //  mov           v1.16b, v5.16b
+    0x4ea61cc2,                                 //  mov           v2.16b, v6.16b
+    0x4ea71ce3,                                 //  mov           v3.16b, v7.16b
+    0x4eb31e64,                                 //  mov           v4.16b, v19.16b
+    0x4eb21e45,                                 //  mov           v5.16b, v18.16b
+    0x4eb11e26,                                 //  mov           v6.16b, v17.16b
+    0x4eb01e07,                                 //  mov           v7.16b, v16.16b
+};
+static const unsigned int kSplice_move_src_dst_lowp[] = {
+    0x4ea01c04,                                 //  mov           v4.16b, v0.16b
+    0x4ea11c25,                                 //  mov           v5.16b, v1.16b
+    0x4ea21c46,                                 //  mov           v6.16b, v2.16b
+    0x4ea31c67,                                 //  mov           v7.16b, v3.16b
+};
+static const unsigned int kSplice_move_dst_src_lowp[] = {
+    0x4ea41c80,                                 //  mov           v0.16b, v4.16b
+    0x4ea51ca1,                                 //  mov           v1.16b, v5.16b
+    0x4ea61cc2,                                 //  mov           v2.16b, v6.16b
+    0x4ea71ce3,                                 //  mov           v3.16b, v7.16b
+};
+static const unsigned int kSplice_premul_lowp[] = {
+    0x6e63b410,                                 //  sqrdmulh      v16.8h, v0.8h, v3.8h
+    0x4e201c71,                                 //  and           v17.16b, v3.16b, v0.16b
+    0x4e60ba00,                                 //  abs           v0.8h, v16.8h
+    0x6e63b430,                                 //  sqrdmulh      v16.8h, v1.8h, v3.8h
+    0x6f111620,                                 //  usra          v0.8h, v17.8h, #15
+    0x4e211c71,                                 //  and           v17.16b, v3.16b, v1.16b
+    0x4e60ba01,                                 //  abs           v1.8h, v16.8h
+    0x6e63b450,                                 //  sqrdmulh      v16.8h, v2.8h, v3.8h
+    0x6f111621,                                 //  usra          v1.8h, v17.8h, #15
+    0x4e221c71,                                 //  and           v17.16b, v3.16b, v2.16b
+    0x4e60ba02,                                 //  abs           v2.8h, v16.8h
+    0x6f111622,                                 //  usra          v2.8h, v17.8h, #15
+};
+static const unsigned int kSplice_load_8888_lowp[] = {
+    0xf9400048,                                 //  ldr           x8, [x2]
+    0x8b000908,                                 //  add           x8, x8, x0, lsl #2
+    0x0c400110,                                 //  ld4           {v16.8b-v19.8b}, [x8]
+    0x2f0fa600,                                 //  ushll         v0.8h, v16.8b, #7
+    0x2f0fa621,                                 //  ushll         v1.8h, v17.8b, #7
+    0x2f0fa642,                                 //  ushll         v2.8h, v18.8b, #7
+    0x2f0fa663,                                 //  ushll         v3.8h, v19.8b, #7
+    0x6f183400,                                 //  ursra         v0.8h, v0.8h, #8
+    0x6f183421,                                 //  ursra         v1.8h, v1.8h, #8
+    0x6f183442,                                 //  ursra         v2.8h, v2.8h, #8
+    0x6f183463,                                 //  ursra         v3.8h, v3.8h, #8
+};
+static const unsigned int kSplice_store_8888_lowp[] = {
+    0xf9400048,                                 //  ldr           x8, [x2]
+    0x2f099410,                                 //  uqshrn        v16.8b, v0.8h, #7
+    0x2f099431,                                 //  uqshrn        v17.8b, v1.8h, #7
+    0x2f099452,                                 //  uqshrn        v18.8b, v2.8h, #7
+    0x8b000908,                                 //  add           x8, x8, x0, lsl #2
+    0x2f099473,                                 //  uqshrn        v19.8b, v3.8h, #7
+    0x0c000110,                                 //  st4           {v16.8b-v19.8b}, [x8]
+};
+
+#elif defined(__ARM_NEON__)
+
+static const unsigned int kSplice_inc_x_lowp[] = {
+    0xe2800004,                                 //  add           r0, r0, #4
+};
+static const unsigned int kSplice_clear_lowp[] = {
+    0xf2800010,                                 //  vmov.i32      d0, #0
+    0xf2801010,                                 //  vmov.i32      d1, #0
+    0xf2802010,                                 //  vmov.i32      d2, #0
+    0xf2803010,                                 //  vmov.i32      d3, #0
+};
+static const unsigned int kSplice_plus__lowp[] = {
+    0xf3100014,                                 //  vqadd.u16     d0, d0, d4
+    0xf3111015,                                 //  vqadd.u16     d1, d1, d5
+    0xf3122016,                                 //  vqadd.u16     d2, d2, d6
+    0xf3133017,                                 //  vqadd.u16     d3, d3, d7
+};
+static const unsigned int kSplice_srcover_lowp[] = {
+    0xe283c002,                                 //  add           ip, r3, #2
+    0xf4ec0c5f,                                 //  vld1.16       {d16[]}, [ip :16]
+    0xf3500293,                                 //  vqsub.u16     d16, d16, d3
+    0xf3541b20,                                 //  vqrdmulh.s16  d17, d4, d16
+    0xf3552b20,                                 //  vqrdmulh.s16  d18, d5, d16
+    0xf3563b20,                                 //  vqrdmulh.s16  d19, d6, d16
+    0xf3574b20,                                 //  vqrdmulh.s16  d20, d7, d16
+    0xf2405194,                                 //  vand          d21, d16, d4
+    0xf2406195,                                 //  vand          d22, d16, d5
+    0xf2407196,                                 //  vand          d23, d16, d6
+    0xf2400197,                                 //  vand          d16, d16, d7
+    0xf3f51321,                                 //  vabs.s16      d17, d17
+    0xf3f52322,                                 //  vabs.s16      d18, d18
+    0xf3f53323,                                 //  vabs.s16      d19, d19
+    0xf3f54324,                                 //  vabs.s16      d20, d20
+    0xf3d11135,                                 //  vsra.u16      d17, d21, #15
+    0xf3d12136,                                 //  vsra.u16      d18, d22, #15
+    0xf3d13137,                                 //  vsra.u16      d19, d23, #15
+    0xf3d14130,                                 //  vsra.u16      d20, d16, #15
+    0xf3110090,                                 //  vqadd.u16     d0, d17, d0
+    0xf3121091,                                 //  vqadd.u16     d1, d18, d1
+    0xf3132092,                                 //  vqadd.u16     d2, d19, d2
+    0xf3143093,                                 //  vqadd.u16     d3, d20, d3
+};
+static const unsigned int kSplice_dstover_lowp[] = {
+    0xe283c002,                                 //  add           ip, r3, #2
+    0xf4ec0c5f,                                 //  vld1.16       {d16[]}, [ip :16]
+    0xf3500297,                                 //  vqsub.u16     d16, d16, d7
+    0xf3501b20,                                 //  vqrdmulh.s16  d17, d0, d16
+    0xf3512b20,                                 //  vqrdmulh.s16  d18, d1, d16
+    0xf3523b20,                                 //  vqrdmulh.s16  d19, d2, d16
+    0xf3534b20,                                 //  vqrdmulh.s16  d20, d3, d16
+    0xf2405190,                                 //  vand          d21, d16, d0
+    0xf2406191,                                 //  vand          d22, d16, d1
+    0xf2407192,                                 //  vand          d23, d16, d2
+    0xf2400193,                                 //  vand          d16, d16, d3
+    0xf3f51321,                                 //  vabs.s16      d17, d17
+    0xf3f52322,                                 //  vabs.s16      d18, d18
+    0xf3f53323,                                 //  vabs.s16      d19, d19
+    0xf3f54324,                                 //  vabs.s16      d20, d20
+    0xf3d11135,                                 //  vsra.u16      d17, d21, #15
+    0xf3d12136,                                 //  vsra.u16      d18, d22, #15
+    0xf3d13137,                                 //  vsra.u16      d19, d23, #15
+    0xf3d14130,                                 //  vsra.u16      d20, d16, #15
+    0xf3114094,                                 //  vqadd.u16     d4, d17, d4
+    0xf3125095,                                 //  vqadd.u16     d5, d18, d5
+    0xf3136096,                                 //  vqadd.u16     d6, d19, d6
+    0xf3147097,                                 //  vqadd.u16     d7, d20, d7
+};
+static const unsigned int kSplice_clamp_1_lowp[] = {
+    0xe283c002,                                 //  add           ip, r3, #2
+    0xf4ec0c5f,                                 //  vld1.16       {d16[]}, [ip :16]
+    0xf3100630,                                 //  vmin.u16      d0, d0, d16
+    0xf3111630,                                 //  vmin.u16      d1, d1, d16
+    0xf3122630,                                 //  vmin.u16      d2, d2, d16
+    0xf3133630,                                 //  vmin.u16      d3, d3, d16
+};
+static const unsigned int kSplice_clamp_a_lowp[] = {
+    0xe283c002,                                 //  add           ip, r3, #2
+    0xf4ec0c5f,                                 //  vld1.16       {d16[]}, [ip :16]
+    0xf3133630,                                 //  vmin.u16      d3, d3, d16
+    0xf3100613,                                 //  vmin.u16      d0, d0, d3
+    0xf3111613,                                 //  vmin.u16      d1, d1, d3
+    0xf3122613,                                 //  vmin.u16      d2, d2, d3
+};
+static const unsigned int kSplice_swap_lowp[] = {
+    0xeef00b43,                                 //  vmov.f64      d16, d3
+    0xeef01b42,                                 //  vmov.f64      d17, d2
+    0xeef02b41,                                 //  vmov.f64      d18, d1
+    0xeef03b40,                                 //  vmov.f64      d19, d0
+    0xeeb00b44,                                 //  vmov.f64      d0, d4
+    0xeeb01b45,                                 //  vmov.f64      d1, d5
+    0xeeb02b46,                                 //  vmov.f64      d2, d6
+    0xeeb03b47,                                 //  vmov.f64      d3, d7
+    0xeeb04b63,                                 //  vmov.f64      d4, d19
+    0xeeb05b62,                                 //  vmov.f64      d5, d18
+    0xeeb06b61,                                 //  vmov.f64      d6, d17
+    0xeeb07b60,                                 //  vmov.f64      d7, d16
+};
+static const unsigned int kSplice_move_src_dst_lowp[] = {
+    0xeeb04b40,                                 //  vmov.f64      d4, d0
+    0xeeb05b41,                                 //  vmov.f64      d5, d1
+    0xeeb06b42,                                 //  vmov.f64      d6, d2
+    0xeeb07b43,                                 //  vmov.f64      d7, d3
+};
+static const unsigned int kSplice_move_dst_src_lowp[] = {
+    0xeeb00b44,                                 //  vmov.f64      d0, d4
+    0xeeb01b45,                                 //  vmov.f64      d1, d5
+    0xeeb02b46,                                 //  vmov.f64      d2, d6
+    0xeeb03b47,                                 //  vmov.f64      d3, d7
+};
+static const unsigned int kSplice_premul_lowp[] = {
+    0xf3500b03,                                 //  vqrdmulh.s16  d16, d0, d3
+    0xf3511b03,                                 //  vqrdmulh.s16  d17, d1, d3
+    0xf3522b03,                                 //  vqrdmulh.s16  d18, d2, d3
+    0xf2433110,                                 //  vand          d19, d3, d0
+    0xf2434111,                                 //  vand          d20, d3, d1
+    0xf3b50320,                                 //  vabs.s16      d0, d16
+    0xf2430112,                                 //  vand          d16, d3, d2
+    0xf3b51321,                                 //  vabs.s16      d1, d17
+    0xf3b52322,                                 //  vabs.s16      d2, d18
+    0xf3910133,                                 //  vsra.u16      d0, d19, #15
+    0xf3911134,                                 //  vsra.u16      d1, d20, #15
+    0xf3912130,                                 //  vsra.u16      d2, d16, #15
+};
+static const unsigned int kSplice_load_8888_lowp[] = {
+    0xe592c000,                                 //  ldr           ip, [r2]
+    0xe08cc100,                                 //  add           ip, ip, r0, lsl #2
+    0xf4ec030d,                                 //  vld4.8        {d16[0],d17[0],d18[0],d19[0]}, [ip]!
+    0xf4ec032d,                                 //  vld4.8        {d16[1],d17[1],d18[1],d19[1]}, [ip]!
+    0xf4ec034d,                                 //  vld4.8        {d16[2],d17[2],d18[2],d19[2]}, [ip]!
+    0xf4ec036d,                                 //  vld4.8        {d16[3],d17[3],d18[3],d19[3]}, [ip]!
+    0xf38f0a30,                                 //  vshll.u8      q0, d16, #7
+    0xf38f2a32,                                 //  vshll.u8      q1, d18, #7
+    0xf3cf0a31,                                 //  vshll.u8      q8, d17, #7
+    0xf3cf2a33,                                 //  vshll.u8      q9, d19, #7
+    0xf3980350,                                 //  vrsra.u16     q0, q0, #8
+    0xf3d80370,                                 //  vrsra.u16     q8, q8, #8
+    0xf3d82372,                                 //  vrsra.u16     q9, q9, #8
+    0xf3982352,                                 //  vrsra.u16     q1, q1, #8
+    0xf22011b0,                                 //  vorr          d1, d16, d16
+    0xf22231b2,                                 //  vorr          d3, d18, d18
+};
+static const unsigned int kSplice_store_8888_lowp[] = {
+    0xf2630113,                                 //  vorr          d16, d3, d3
+    0xe592c000,                                 //  ldr           ip, [r2]
+    0xf2612111,                                 //  vorr          d18, d1, d1
+    0xf3c94910,                                 //  vqshrn.u16    d20, q0, #7
+    0xe08cc100,                                 //  add           ip, ip, r0, lsl #2
+    0xf3c96912,                                 //  vqshrn.u16    d22, q1, #7
+    0xf3c95932,                                 //  vqshrn.u16    d21, q9, #7
+    0xf3c97930,                                 //  vqshrn.u16    d23, q8, #7
+    0xf4cc430d,                                 //  vst4.8        {d20[0],d21[0],d22[0],d23[0]}, [ip]!
+    0xf4cc432d,                                 //  vst4.8        {d20[1],d21[1],d22[1],d23[1]}, [ip]!
+    0xf4cc434d,                                 //  vst4.8        {d20[2],d21[2],d22[2],d23[2]}, [ip]!
+    0xf4cc436d,                                 //  vst4.8        {d20[3],d21[3],d22[3],d23[3]}, [ip]!
+};
+
+#else
+
+static const unsigned char kSplice_inc_x_lowp[] = {
+    0x48,0x83,0xc7,0x10,                        //  add           $0x10,%rdi
+};
+static const unsigned char kSplice_clear_lowp[] = {
+    0xc5,0xfc,0x57,0xc0,                        //  vxorps        %ymm0,%ymm0,%ymm0
+    0xc5,0xf4,0x57,0xc9,                        //  vxorps        %ymm1,%ymm1,%ymm1
+    0xc5,0xec,0x57,0xd2,                        //  vxorps        %ymm2,%ymm2,%ymm2
+    0xc5,0xe4,0x57,0xdb,                        //  vxorps        %ymm3,%ymm3,%ymm3
+};
+static const unsigned char kSplice_plus__lowp[] = {
+    0xc5,0xfd,0xdd,0xc4,                        //  vpaddusw      %ymm4,%ymm0,%ymm0
+    0xc5,0xf5,0xdd,0xcd,                        //  vpaddusw      %ymm5,%ymm1,%ymm1
+    0xc5,0xed,0xdd,0xd6,                        //  vpaddusw      %ymm6,%ymm2,%ymm2
+    0xc5,0xe5,0xdd,0xdf,                        //  vpaddusw      %ymm7,%ymm3,%ymm3
+};
+static const unsigned char kSplice_srcover_lowp[] = {
+    0xc4,0x62,0x7d,0x79,0x41,0x02,              //  vpbroadcastw  0x2(%rcx),%ymm8
+    0xc5,0x3d,0xd9,0xc3,                        //  vpsubusw      %ymm3,%ymm8,%ymm8
+    0xc4,0x42,0x5d,0x0b,0xc8,                   //  vpmulhrsw     %ymm8,%ymm4,%ymm9
+    0xc4,0x42,0x7d,0x1d,0xc9,                   //  vpabsw        %ymm9,%ymm9
+    0xc5,0xb5,0xdd,0xc0,                        //  vpaddusw      %ymm0,%ymm9,%ymm0
+    0xc4,0x42,0x55,0x0b,0xc8,                   //  vpmulhrsw     %ymm8,%ymm5,%ymm9
+    0xc4,0x42,0x7d,0x1d,0xc9,                   //  vpabsw        %ymm9,%ymm9
+    0xc5,0xb5,0xdd,0xc9,                        //  vpaddusw      %ymm1,%ymm9,%ymm1
+    0xc4,0x42,0x4d,0x0b,0xc8,                   //  vpmulhrsw     %ymm8,%ymm6,%ymm9
+    0xc4,0x42,0x7d,0x1d,0xc9,                   //  vpabsw        %ymm9,%ymm9
+    0xc5,0xb5,0xdd,0xd2,                        //  vpaddusw      %ymm2,%ymm9,%ymm2
+    0xc4,0x42,0x45,0x0b,0xc0,                   //  vpmulhrsw     %ymm8,%ymm7,%ymm8
+    0xc4,0x42,0x7d,0x1d,0xc0,                   //  vpabsw        %ymm8,%ymm8
+    0xc5,0xbd,0xdd,0xdb,                        //  vpaddusw      %ymm3,%ymm8,%ymm3
+};
+static const unsigned char kSplice_dstover_lowp[] = {
+    0xc4,0x62,0x7d,0x79,0x41,0x02,              //  vpbroadcastw  0x2(%rcx),%ymm8
+    0xc5,0x3d,0xd9,0xc7,                        //  vpsubusw      %ymm7,%ymm8,%ymm8
+    0xc4,0x42,0x7d,0x0b,0xc8,                   //  vpmulhrsw     %ymm8,%ymm0,%ymm9
+    0xc4,0x42,0x7d,0x1d,0xc9,                   //  vpabsw        %ymm9,%ymm9
+    0xc5,0xb5,0xdd,0xe4,                        //  vpaddusw      %ymm4,%ymm9,%ymm4
+    0xc4,0x42,0x75,0x0b,0xc8,                   //  vpmulhrsw     %ymm8,%ymm1,%ymm9
+    0xc4,0x42,0x7d,0x1d,0xc9,                   //  vpabsw        %ymm9,%ymm9
+    0xc5,0xb5,0xdd,0xed,                        //  vpaddusw      %ymm5,%ymm9,%ymm5
+    0xc4,0x42,0x6d,0x0b,0xc8,                   //  vpmulhrsw     %ymm8,%ymm2,%ymm9
+    0xc4,0x42,0x7d,0x1d,0xc9,                   //  vpabsw        %ymm9,%ymm9
+    0xc5,0xb5,0xdd,0xf6,                        //  vpaddusw      %ymm6,%ymm9,%ymm6
+    0xc4,0x42,0x65,0x0b,0xc0,                   //  vpmulhrsw     %ymm8,%ymm3,%ymm8
+    0xc4,0x42,0x7d,0x1d,0xc0,                   //  vpabsw        %ymm8,%ymm8
+    0xc5,0xbd,0xdd,0xff,                        //  vpaddusw      %ymm7,%ymm8,%ymm7
+};
+static const unsigned char kSplice_clamp_1_lowp[] = {
+    0xc4,0x62,0x7d,0x79,0x41,0x02,              //  vpbroadcastw  0x2(%rcx),%ymm8
+    0xc4,0xc2,0x7d,0x3a,0xc0,                   //  vpminuw       %ymm8,%ymm0,%ymm0
+    0xc4,0xc2,0x75,0x3a,0xc8,                   //  vpminuw       %ymm8,%ymm1,%ymm1
+    0xc4,0xc2,0x6d,0x3a,0xd0,                   //  vpminuw       %ymm8,%ymm2,%ymm2
+    0xc4,0xc2,0x65,0x3a,0xd8,                   //  vpminuw       %ymm8,%ymm3,%ymm3
+};
+static const unsigned char kSplice_clamp_a_lowp[] = {
+    0xc4,0x62,0x7d,0x79,0x41,0x02,              //  vpbroadcastw  0x2(%rcx),%ymm8
+    0xc4,0xc2,0x65,0x3a,0xd8,                   //  vpminuw       %ymm8,%ymm3,%ymm3
+    0xc4,0xe2,0x7d,0x3a,0xc3,                   //  vpminuw       %ymm3,%ymm0,%ymm0
+    0xc4,0xe2,0x75,0x3a,0xcb,                   //  vpminuw       %ymm3,%ymm1,%ymm1
+    0xc4,0xe2,0x6d,0x3a,0xd3,                   //  vpminuw       %ymm3,%ymm2,%ymm2
+};
+static const unsigned char kSplice_swap_lowp[] = {
+    0xc5,0x7c,0x28,0xc3,                        //  vmovaps       %ymm3,%ymm8
+    0xc5,0x7c,0x28,0xca,                        //  vmovaps       %ymm2,%ymm9
+    0xc5,0x7c,0x28,0xd1,                        //  vmovaps       %ymm1,%ymm10
+    0xc5,0x7c,0x28,0xd8,                        //  vmovaps       %ymm0,%ymm11
+    0xc5,0xfc,0x28,0xc4,                        //  vmovaps       %ymm4,%ymm0
+    0xc5,0xfc,0x28,0xcd,                        //  vmovaps       %ymm5,%ymm1
+    0xc5,0xfc,0x28,0xd6,                        //  vmovaps       %ymm6,%ymm2
+    0xc5,0xfc,0x28,0xdf,                        //  vmovaps       %ymm7,%ymm3
+    0xc5,0x7c,0x29,0xdc,                        //  vmovaps       %ymm11,%ymm4
+    0xc5,0x7c,0x29,0xd5,                        //  vmovaps       %ymm10,%ymm5
+    0xc5,0x7c,0x29,0xce,                        //  vmovaps       %ymm9,%ymm6
+    0xc5,0x7c,0x29,0xc7,                        //  vmovaps       %ymm8,%ymm7
+};
+static const unsigned char kSplice_move_src_dst_lowp[] = {
+    0xc5,0xfc,0x28,0xe0,                        //  vmovaps       %ymm0,%ymm4
+    0xc5,0xfc,0x28,0xe9,                        //  vmovaps       %ymm1,%ymm5
+    0xc5,0xfc,0x28,0xf2,                        //  vmovaps       %ymm2,%ymm6
+    0xc5,0xfc,0x28,0xfb,                        //  vmovaps       %ymm3,%ymm7
+};
+static const unsigned char kSplice_move_dst_src_lowp[] = {
+    0xc5,0xfc,0x28,0xc4,                        //  vmovaps       %ymm4,%ymm0
+    0xc5,0xfc,0x28,0xcd,                        //  vmovaps       %ymm5,%ymm1
+    0xc5,0xfc,0x28,0xd6,                        //  vmovaps       %ymm6,%ymm2
+    0xc5,0xfc,0x28,0xdf,                        //  vmovaps       %ymm7,%ymm3
+};
+static const unsigned char kSplice_premul_lowp[] = {
+    0xc4,0xe2,0x7d,0x0b,0xc3,                   //  vpmulhrsw     %ymm3,%ymm0,%ymm0
+    0xc4,0xe2,0x7d,0x1d,0xc0,                   //  vpabsw        %ymm0,%ymm0
+    0xc4,0xe2,0x75,0x0b,0xcb,                   //  vpmulhrsw     %ymm3,%ymm1,%ymm1
+    0xc4,0xe2,0x7d,0x1d,0xc9,                   //  vpabsw        %ymm1,%ymm1
+    0xc4,0xe2,0x6d,0x0b,0xd3,                   //  vpmulhrsw     %ymm3,%ymm2,%ymm2
+    0xc4,0xe2,0x7d,0x1d,0xd2,                   //  vpabsw        %ymm2,%ymm2
+};
+static const unsigned char kSplice_load_8888_lowp[] = {
+    0x48,0x8b,0x02,                             //  mov           (%rdx),%rax
+    0xc5,0xfa,0x6f,0x04,0xb8,                   //  vmovdqu       (%rax,%rdi,4),%xmm0
+    0xc5,0xfa,0x6f,0x4c,0xb8,0x10,              //  vmovdqu       0x10(%rax,%rdi,4),%xmm1
+    0xc5,0xfa,0x6f,0x54,0xb8,0x20,              //  vmovdqu       0x20(%rax,%rdi,4),%xmm2
+    0xc5,0xfa,0x6f,0x5c,0xb8,0x30,              //  vmovdqu       0x30(%rax,%rdi,4),%xmm3
+    0xc5,0x79,0x60,0xc1,                        //  vpunpcklbw    %xmm1,%xmm0,%xmm8
+    0xc5,0xf9,0x68,0xc1,                        //  vpunpckhbw    %xmm1,%xmm0,%xmm0
+    0xc5,0xe9,0x60,0xcb,                        //  vpunpcklbw    %xmm3,%xmm2,%xmm1
+    0xc5,0xe9,0x68,0xd3,                        //  vpunpckhbw    %xmm3,%xmm2,%xmm2
+    0xc5,0xb9,0x60,0xd8,                        //  vpunpcklbw    %xmm0,%xmm8,%xmm3
+    0xc5,0xb9,0x68,0xc0,                        //  vpunpckhbw    %xmm0,%xmm8,%xmm0
+    0xc5,0x71,0x60,0xc2,                        //  vpunpcklbw    %xmm2,%xmm1,%xmm8
+    0xc5,0xf1,0x68,0xca,                        //  vpunpckhbw    %xmm2,%xmm1,%xmm1
+    0xc5,0xe1,0x60,0xd0,                        //  vpunpcklbw    %xmm0,%xmm3,%xmm2
+    0xc5,0x61,0x68,0xc8,                        //  vpunpckhbw    %xmm0,%xmm3,%xmm9
+    0xc5,0xb9,0x60,0xd9,                        //  vpunpcklbw    %xmm1,%xmm8,%xmm3
+    0xc5,0x39,0x68,0xc1,                        //  vpunpckhbw    %xmm1,%xmm8,%xmm8
+    0xc5,0xe9,0x6c,0xc3,                        //  vpunpcklqdq   %xmm3,%xmm2,%xmm0
+    0xc4,0xe2,0x7d,0x30,0xc0,                   //  vpmovzxbw     %xmm0,%ymm0
+    0xc5,0xf5,0x71,0xf0,0x07,                   //  vpsllw        $0x7,%ymm0,%ymm1
+    0xc5,0xad,0x71,0xd0,0x01,                   //  vpsrlw        $0x1,%ymm0,%ymm10
+    0xc4,0xc1,0x75,0xdd,0xca,                   //  vpaddusw      %ymm10,%ymm1,%ymm1
+    0xc4,0x62,0x7d,0x79,0x11,                   //  vpbroadcastw  (%rcx),%ymm10
+    0xc4,0xc1,0x7d,0xdd,0xc2,                   //  vpaddusw      %ymm10,%ymm0,%ymm0
+    0xc5,0xfd,0x71,0xd0,0x08,                   //  vpsrlw        $0x8,%ymm0,%ymm0
+    0xc5,0xf5,0xdd,0xc0,                        //  vpaddusw      %ymm0,%ymm1,%ymm0
+    0xc5,0xe9,0x6d,0xcb,                        //  vpunpckhqdq   %xmm3,%xmm2,%xmm1
+    0xc4,0xe2,0x7d,0x30,0xc9,                   //  vpmovzxbw     %xmm1,%ymm1
+    0xc5,0xed,0x71,0xf1,0x07,                   //  vpsllw        $0x7,%ymm1,%ymm2
+    0xc5,0xe5,0x71,0xd1,0x01,                   //  vpsrlw        $0x1,%ymm1,%ymm3
+    0xc5,0xed,0xdd,0xd3,                        //  vpaddusw      %ymm3,%ymm2,%ymm2
+    0xc4,0xc1,0x75,0xdd,0xca,                   //  vpaddusw      %ymm10,%ymm1,%ymm1
+    0xc5,0xf5,0x71,0xd1,0x08,                   //  vpsrlw        $0x8,%ymm1,%ymm1
+    0xc5,0xed,0xdd,0xc9,                        //  vpaddusw      %ymm1,%ymm2,%ymm1
+    0xc4,0xc1,0x31,0x6c,0xd0,                   //  vpunpcklqdq   %xmm8,%xmm9,%xmm2
+    0xc4,0xe2,0x7d,0x30,0xd2,                   //  vpmovzxbw     %xmm2,%ymm2
+    0xc5,0xe5,0x71,0xf2,0x07,                   //  vpsllw        $0x7,%ymm2,%ymm3
+    0xc5,0xa5,0x71,0xd2,0x01,                   //  vpsrlw        $0x1,%ymm2,%ymm11
+    0xc4,0xc1,0x65,0xdd,0xdb,                   //  vpaddusw      %ymm11,%ymm3,%ymm3
+    0xc4,0xc1,0x6d,0xdd,0xd2,                   //  vpaddusw      %ymm10,%ymm2,%ymm2
+    0xc5,0xed,0x71,0xd2,0x08,                   //  vpsrlw        $0x8,%ymm2,%ymm2
+    0xc5,0xe5,0xdd,0xd2,                        //  vpaddusw      %ymm2,%ymm3,%ymm2
+    0xc4,0xc1,0x31,0x6d,0xd8,                   //  vpunpckhqdq   %xmm8,%xmm9,%xmm3
+    0xc4,0xe2,0x7d,0x30,0xdb,                   //  vpmovzxbw     %xmm3,%ymm3
+    0xc5,0xbd,0x71,0xf3,0x07,                   //  vpsllw        $0x7,%ymm3,%ymm8
+    0xc5,0xb5,0x71,0xd3,0x01,                   //  vpsrlw        $0x1,%ymm3,%ymm9
+    0xc4,0x41,0x3d,0xdd,0xc1,                   //  vpaddusw      %ymm9,%ymm8,%ymm8
+    0xc4,0xc1,0x65,0xdd,0xda,                   //  vpaddusw      %ymm10,%ymm3,%ymm3
+    0xc5,0xe5,0x71,0xd3,0x08,                   //  vpsrlw        $0x8,%ymm3,%ymm3
+    0xc5,0xbd,0xdd,0xdb,                        //  vpaddusw      %ymm3,%ymm8,%ymm3
+};
+static const unsigned char kSplice_store_8888_lowp[] = {
+    0x48,0x8b,0x02,                             //  mov           (%rdx),%rax
+    0xc5,0x7d,0xdd,0xc0,                        //  vpaddusw      %ymm0,%ymm0,%ymm8
+    0xc4,0xc1,0x3d,0x71,0xd0,0x08,              //  vpsrlw        $0x8,%ymm8,%ymm8
+    0xc4,0x43,0x7d,0x39,0xc1,0x01,              //  vextracti128  $0x1,%ymm8,%xmm9
+    0xc4,0x41,0x39,0x67,0xc1,                   //  vpackuswb     %xmm9,%xmm8,%xmm8
+    0xc5,0x75,0xdd,0xc9,                        //  vpaddusw      %ymm1,%ymm1,%ymm9
+    0xc4,0xc1,0x35,0x71,0xd1,0x08,              //  vpsrlw        $0x8,%ymm9,%ymm9
+    0xc4,0x43,0x7d,0x39,0xca,0x01,              //  vextracti128  $0x1,%ymm9,%xmm10
+    0xc4,0x41,0x31,0x67,0xca,                   //  vpackuswb     %xmm10,%xmm9,%xmm9
+    0xc5,0x6d,0xdd,0xd2,                        //  vpaddusw      %ymm2,%ymm2,%ymm10
+    0xc4,0xc1,0x2d,0x71,0xd2,0x08,              //  vpsrlw        $0x8,%ymm10,%ymm10
+    0xc4,0x43,0x7d,0x39,0xd3,0x01,              //  vextracti128  $0x1,%ymm10,%xmm11
+    0xc4,0x41,0x29,0x67,0xd3,                   //  vpackuswb     %xmm11,%xmm10,%xmm10
+    0xc5,0x65,0xdd,0xdb,                        //  vpaddusw      %ymm3,%ymm3,%ymm11
+    0xc4,0xc1,0x25,0x71,0xd3,0x08,              //  vpsrlw        $0x8,%ymm11,%ymm11
+    0xc4,0x43,0x7d,0x39,0xdc,0x01,              //  vextracti128  $0x1,%ymm11,%xmm12
+    0xc4,0x41,0x21,0x67,0xdc,                   //  vpackuswb     %xmm12,%xmm11,%xmm11
+    0xc4,0x41,0x39,0x60,0xe1,                   //  vpunpcklbw    %xmm9,%xmm8,%xmm12
+    0xc4,0x41,0x39,0x68,0xc1,                   //  vpunpckhbw    %xmm9,%xmm8,%xmm8
+    0xc4,0x41,0x29,0x60,0xcb,                   //  vpunpcklbw    %xmm11,%xmm10,%xmm9
+    0xc4,0x41,0x29,0x68,0xd3,                   //  vpunpckhbw    %xmm11,%xmm10,%xmm10
+    0xc4,0x41,0x19,0x61,0xd9,                   //  vpunpcklwd    %xmm9,%xmm12,%xmm11
+    0xc5,0x7a,0x7f,0x1c,0xb8,                   //  vmovdqu       %xmm11,(%rax,%rdi,4)
+    0xc4,0x41,0x19,0x69,0xc9,                   //  vpunpckhwd    %xmm9,%xmm12,%xmm9
+    0xc5,0x7a,0x7f,0x4c,0xb8,0x10,              //  vmovdqu       %xmm9,0x10(%rax,%rdi,4)
+    0xc4,0x41,0x39,0x61,0xca,                   //  vpunpcklwd    %xmm10,%xmm8,%xmm9
+    0xc5,0x7a,0x7f,0x4c,0xb8,0x20,              //  vmovdqu       %xmm9,0x20(%rax,%rdi,4)
+    0xc4,0x41,0x39,0x69,0xc2,                   //  vpunpckhwd    %xmm10,%xmm8,%xmm8
+    0xc5,0x7a,0x7f,0x44,0xb8,0x30,              //  vmovdqu       %xmm8,0x30(%rax,%rdi,4)
+};
+
+#endif
+
+#endif//SkSplicer_generated_lowp_DEFINED
diff --git a/src/splicer/SkSplicer_shared.h b/src/splicer/SkSplicer_shared.h
index 1c530c4..7f4db14 100644
--- a/src/splicer/SkSplicer_shared.h
+++ b/src/splicer/SkSplicer_shared.h
@@ -40,4 +40,9 @@
     float    _00043;       //  0.0043f
 };
 
+struct SkSplicer_constants_lowp {
+    uint16_t _0x0001;      // 0x0001 ==     1 == epsilon
+    uint16_t _1;           // 0x8000 == 32768 == 1.0
+};
+
 #endif//SkSplicer_shared_DEFINED
diff --git a/src/splicer/SkSplicer_stages.cpp b/src/splicer/SkSplicer_stages.cpp
index 755bb5d..c61a267 100644
--- a/src/splicer/SkSplicer_stages.cpp
+++ b/src/splicer/SkSplicer_stages.cpp
@@ -119,14 +119,14 @@
 // This should feel familiar to anyone who's read SkRasterPipeline_opts.h.
 // It's just a convenience to make a valid, spliceable Stage, nothing magic.
 #define STAGE(name)                                                           \
-    static void name##_k(size_t x, size_t limit, void* ctx, K* k,             \
+    static void name##_k(size_t& x, size_t limit, void* ctx, K* k,            \
                          F& r, F& g, F& b, F& a, F& dr, F& dg, F& db, F& da); \
     C void name(size_t x, size_t limit, void* ctx, K* k,                      \
                 F r, F g, F b, F a, F dr, F dg, F db, F da) {                 \
         name##_k(x,limit,ctx,k, r,g,b,a, dr,dg,db,da);                        \
         done    (x,limit,ctx,k, r,g,b,a, dr,dg,db,da);                        \
     }                                                                         \
-    static void name##_k(size_t x, size_t limit, void* ctx, K* k,             \
+    static void name##_k(size_t& x, size_t limit, void* ctx, K* k,            \
                          F& r, F& g, F& b, F& a, F& dr, F& dg, F& db, F& da)
 
 // We can now define Stages!
@@ -144,11 +144,15 @@
 //   - lambdas;
 //   - memcpy() with a compile-time constant size argument.
 
+STAGE(inc_x) {
+    x += sizeof(F) / sizeof(float);
+}
+
 STAGE(clear) {
     r = g = b = a = 0;
 }
 
-STAGE(plus) {
+STAGE(plus_) {
     r = r + dr;
     g = g + dg;
     b = b + db;
diff --git a/src/splicer/SkSplicer_stages_lowp.cpp b/src/splicer/SkSplicer_stages_lowp.cpp
new file mode 100644
index 0000000..ef3ab40
--- /dev/null
+++ b/src/splicer/SkSplicer_stages_lowp.cpp
@@ -0,0 +1,336 @@
+/*
+ * Copyright 2017 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+// This file is very similar to SkSplicer_stages.cpp, and you will want to read through that file
+// first before trying to understand this one.  We'll note only key differences here.
+
+#include "SkSplicer_shared.h"
+#include <string.h>
+
+#if !defined(__clang__)
+    #error This file is not like the rest of Skia.  It must be compiled with clang.
+#endif
+
+#if defined(__aarch64__)
+    #include <arm_neon.h>
+
+    // In this file, F is a vector of SkFixed15.
+    // See SkFixed15.h for notes on its various operations.
+    struct F {
+        using V = uint16_t __attribute__((ext_vector_type(8)));
+
+        V vec;
+
+        F(uint16x8_t v) : vec(v) {}
+        operator V() const { return vec; }
+
+        F() = default;
+        F(uint16_t v) : vec(v) {}
+
+        F operator+(F o) const { return vqaddq_u16(vec, o.vec); }
+        F operator-(F o) const { return vqsubq_u16(vec, o.vec); }
+        F operator*(F o) const {
+            return vsraq_n_u16(vabsq_s16(vqrdmulhq_s16(vec, o.vec)),
+                               vandq_s16(vec, o.vec), 15);
+        }
+        F operator>>(int k) const { return vec >> k; }
+        F operator<<(int k) const { return vec << k; }
+    };
+    static F min(F a, F b) { return vminq_u16(a,b); }
+    static F max(F a, F b) { return vmaxq_u16(a,b); }
+
+#elif defined(__ARM_NEON__)
+    #if defined(__thumb2__) || !defined(__ARM_ARCH_7A__) || !defined(__ARM_VFPV4__)
+        #error On ARMv7, compile with -march=armv7-a -mfpu=neon-vfp4, without -mthumb.
+    #endif
+    #include <arm_neon.h>
+
+    struct F {
+        using V = uint16_t __attribute__((ext_vector_type(4)));
+
+        V vec;
+
+        F(uint16x4_t v) : vec(v) {}
+        operator V() const { return vec; }
+
+        F() = default;
+        F(uint16_t v) : vec(v) {}
+
+        F operator+(F o) const { return vqadd_u16(vec, o.vec); }
+        F operator-(F o) const { return vqsub_u16(vec, o.vec); }
+        F operator*(F o) const {
+            return vsra_n_u16(vabs_s16(vqrdmulh_s16(vec, o.vec)),
+                              vand_s16(vec, o.vec), 15);
+        }
+        F operator>>(int k) const { return vec >> k; }
+        F operator<<(int k) const { return vec << k; }
+    };
+    static F min(F a, F b) { return vmin_u16(a,b); }
+    static F max(F a, F b) { return vmax_u16(a,b); }
+
+#else
+    #if !defined(__AVX2__) || !defined(__FMA__) || !defined(__F16C__)
+        #error On x86, compile with -mavx2 -mfma -mf16c.
+    #endif
+    #include <immintrin.h>
+
+    struct F {
+        using V = uint16_t __attribute__((ext_vector_type(16)));
+
+        V vec;
+
+        F(__m256 v) : vec(v) {}
+        operator V() const { return vec; }
+
+        F() = default;
+        F(uint16_t v) : vec(v) {}
+
+        F operator+(F o) const { return _mm256_adds_epu16(vec, o.vec); }
+        F operator-(F o) const { return _mm256_subs_epu16(vec, o.vec); }
+        F operator*(F o) const { return _mm256_abs_epi16(_mm256_mulhrs_epi16(vec, o.vec)); }
+        F operator>>(int k) const { return vec >> k; }
+        F operator<<(int k) const { return vec << k; }
+    };
+    static F min(F a, F b) { return _mm256_min_epu16(a,b); }
+    static F max(F a, F b) { return _mm256_max_epu16(a,b); }
+#endif
+
+// No platform actually supports FMA for SkFixed15.
+// This fma() method just makes it easier to port stages to lowp.
+static F fma(F f, F m, F a) { return f*m+a; }
+
+#if defined(__ARM_NEON__)
+    #define C extern "C" __attribute__((pcs("aapcs-vfp")))
+#else
+    #define C extern "C"
+#endif
+
+// We use a set of constants suitable for SkFixed15 math.
+using K = const SkSplicer_constants_lowp;
+using Stage = void(size_t x, size_t limit, void* ctx, K* k, F,F,F,F, F,F,F,F);
+
+// The armv7 aapcs-vfp calling convention makes us pass F::V instead of F if we want them in
+// registers.  This shouldn't affect performance or how you write STAGEs in any way.
+C void done(size_t, size_t, void*, K*, F::V,F::V,F::V,F::V, F::V,F::V,F::V,F::V);
+
+#define STAGE(name)                                                           \
+    static void name##_k(size_t& x, size_t limit, void* ctx, K* k,            \
+                         F& r, F& g, F& b, F& a, F& dr, F& dg, F& db, F& da); \
+    C void name##_lowp(size_t x, size_t limit, void* ctx, K* k,               \
+                       F::V  R, F::V  G, F::V  B, F::V  A,                    \
+                       F::V DR, F::V DG, F::V DB, F::V DA) {                  \
+        F r = R, g = G, b = B, a = A, dr = DR, dg = DG, db = DB, da = DA;     \
+        name##_k(x,limit,ctx,k, r,g,b,a, dr,dg,db,da);                        \
+        done    (x,limit,ctx,k, r,g,b,a, dr,dg,db,da);                        \
+    }                                                                         \
+    static void name##_k(size_t& x, size_t limit, void* ctx, K* k,            \
+                         F& r, F& g, F& b, F& a, F& dr, F& dg, F& db, F& da)
+
+STAGE(inc_x) {
+    x += sizeof(F) / sizeof(uint16_t);
+}
+
+STAGE(clear) {
+    r = g = b = a = 0;
+}
+
+STAGE(plus_) {
+    r = r + dr;
+    g = g + dg;
+    b = b + db;
+    a = a + da;
+}
+
+STAGE(srcover) {
+    auto A = F(k->_1) - a;
+    r = fma(dr, A, r);
+    g = fma(dg, A, g);
+    b = fma(db, A, b);
+    a = fma(da, A, a);
+}
+STAGE(dstover) { srcover_k(x,limit,ctx,k, dr,dg,db,da, r,g,b,a); }
+
+STAGE(clamp_1) {
+    r = min(r, k->_1);
+    g = min(g, k->_1);
+    b = min(b, k->_1);
+    a = min(a, k->_1);
+}
+
+STAGE(clamp_a) {
+    a = min(a, k->_1);
+    r = min(r, a);
+    g = min(g, a);
+    b = min(b, a);
+}
+
+STAGE(swap) {
+    auto swap = [](F& v, F& dv) {
+        auto tmp = v;
+        v = dv;
+        dv = tmp;
+    };
+    swap(r, dr);
+    swap(g, dg);
+    swap(b, db);
+    swap(a, da);
+}
+STAGE(move_src_dst) {
+    dr = r;
+    dg = g;
+    db = b;
+    da = a;
+}
+STAGE(move_dst_src) {
+    r = dr;
+    g = dg;
+    b = db;
+    a = da;
+}
+
+STAGE(premul) {
+    r = r * a;
+    g = g * a;
+    b = b * a;
+}
+
+STAGE(load_8888) {
+    auto ptr = *(const uint32_t**)ctx + x;
+
+#if defined(__aarch64__)
+    auto to_fixed15 = [](uint8x8_t u8) {
+        // u8 * (32768/255) == u8 * 128.50196... == u8*128 + u8/2 + (u8+1)>>8  ( see SkFixed15.h)
+        //
+        // Here we do (u8*128 <rounding +> u8/2), which is the same as our canonical math for 0
+        // and 255, and never off by more than 1 in between.  Thanks to NEON, it's 2 instructions!
+        auto u16 = vshll_n_u8(u8, 7);      // u16 =  u8*128
+        return vrsraq_n_u16(u16, u16, 8);  // u16 + u16/256, with rounding
+    };
+
+    uint8x8x4_t rgba = vld4_u8((const uint8_t*)ptr);
+    r = to_fixed15(rgba.val[0]);
+    g = to_fixed15(rgba.val[1]);
+    b = to_fixed15(rgba.val[2]);
+    a = to_fixed15(rgba.val[3]);
+
+#elif defined(__ARM_NEON__)
+    auto to_fixed15 = [](uint8x8_t u8) {
+        // Same as aarch64, but only keeping the bottom 4 lanes.
+        auto u16 = vshll_n_u8(u8, 7);
+        return vget_low_u16(vrsraq_n_u16(u16, u16, 8));
+    };
+
+    // I can't get quite the code generation I want using vld4_lane_u8(),
+    // so we're going to drop into assembly to do the loads.  :/
+
+    uint8x8_t R,G,B,A;
+    asm("vld4.8 {%1[0],%2[0],%3[0],%4[0]}, [%0]!\n"
+        "vld4.8 {%1[1],%2[1],%3[1],%4[1]}, [%0]!\n"
+        "vld4.8 {%1[2],%2[2],%3[2],%4[2]}, [%0]!\n"
+        "vld4.8 {%1[3],%2[3],%3[3],%4[3]}, [%0]!\n"
+        : "+r"(ptr), "=w"(R), "=w"(G), "=w"(B), "=w"(A));
+    r = to_fixed15(R);
+    g = to_fixed15(G);
+    b = to_fixed15(B);
+    a = to_fixed15(A);
+
+#else
+    auto to_fixed15 = [k](__m128i u8) {
+        F u16 = _mm256_cvtepu8_epi16(u8);
+        return (u16 << 7) + (u16 >> 1) + ((u16+k->_0x0001)>>8);
+    };
+
+    // TODO: shorter, more confusing, faster with 256-bit loads and shuffles
+
+    // Load 16 interplaced pixels.
+    auto _0123 = _mm_loadu_si128((const __m128i*)ptr + 0),
+         _4567 = _mm_loadu_si128((const __m128i*)ptr + 1),
+         _89AB = _mm_loadu_si128((const __m128i*)ptr + 2),
+         _CDEF = _mm_loadu_si128((const __m128i*)ptr + 3);
+
+    // We've got an awful lot of unpacking to do to transpose this...
+    auto _0415 = _mm_unpacklo_epi8(_0123, _4567),  // r04 g04 b04 a04  r15 g15 b15 a15
+         _2637 = _mm_unpackhi_epi8(_0123, _4567),  // r26 g26 b26 a26  r37 g37 b37 a37
+         _8C9D = _mm_unpacklo_epi8(_89AB, _CDEF),
+         _AEBF = _mm_unpackhi_epi8(_89AB, _CDEF);
+
+    auto _0246 = _mm_unpacklo_epi8(_0415, _2637),  // r0246 g0246  b0246 a0246
+         _1357 = _mm_unpackhi_epi8(_0415, _2637),  // r1357 g1357  b1357 a1357
+         _8ACE = _mm_unpacklo_epi8(_8C9D, _AEBF),
+         _9BDF = _mm_unpackhi_epi8(_8C9D, _AEBF);
+
+    auto rg_01234567 = _mm_unpacklo_epi8(_0246, _1357),  // r01234567 g01234567
+         ba_01234567 = _mm_unpackhi_epi8(_0246, _1357),  // b01234567 a01234567
+         rg_89ABCDEF = _mm_unpacklo_epi8(_8ACE, _9BDF),  // r89ABCDEF g89ABCDEF
+         ba_89ABCDEF = _mm_unpackhi_epi8(_8ACE, _9BDF);  // b89ABCDEF a89ABCDEF
+
+    r = to_fixed15(_mm_unpacklo_epi64(rg_01234567, rg_89ABCDEF));
+    g = to_fixed15(_mm_unpackhi_epi64(rg_01234567, rg_89ABCDEF));
+    b = to_fixed15(_mm_unpacklo_epi64(ba_01234567, ba_89ABCDEF));
+    a = to_fixed15(_mm_unpackhi_epi64(ba_01234567, ba_89ABCDEF));
+#endif
+}
+
+STAGE(store_8888) {
+    auto ptr = *(uint32_t**)ctx + x;
+
+#if defined(__aarch64__)
+    auto from_fixed15 = [](F v) {
+        // The canonical math for this from SkFixed15.h is (v - (v>>8)) >> 7.
+        // But what's really most important is that all bytes round trip.
+
+        // We can do this in NEON in one instruction, a saturating narrowing right shift:
+        return vqshrn_n_u16(v, 7);
+    };
+
+    uint8x8x4_t rgba = {{
+        from_fixed15(r),
+        from_fixed15(g),
+        from_fixed15(b),
+        from_fixed15(a),
+    }};
+    vst4_u8((uint8_t*)ptr, rgba);
+#elif defined(__ARM_NEON__)
+    auto from_fixed15 = [](F v) {
+        // Same as aarch64, but first we need to pad our vectors from 8 to 16 bytes.
+        F whatever;
+        return vqshrn_n_u16(vcombine_u8(v, whatever), 7);
+    };
+
+    // As in load_8888, I can't get quite the ideal code generation using vst4_lane_u8().
+    asm("vst4.8 {%1[0],%2[0],%3[0],%4[0]}, [%0]!\n"
+        "vst4.8 {%1[1],%2[1],%3[1],%4[1]}, [%0]!\n"
+        "vst4.8 {%1[2],%2[2],%3[2],%4[2]}, [%0]!\n"
+        "vst4.8 {%1[3],%2[3],%3[3],%4[3]}, [%0]!\n"
+        : "+r"(ptr)
+        : "w"(from_fixed15(r)), "w"(from_fixed15(g)), "w"(from_fixed15(b)), "w"(from_fixed15(a))
+        : "memory");
+
+#else
+    auto from_fixed15 = [](F v) {
+        // See the note in aarch64's from_fixed15().  The same roundtrip goal applies here.
+        // Here we take a different approach: (v saturated+ v) >> 8.
+        v = (v+v) >> 8;
+        return _mm_packus_epi16(_mm256_extracti128_si256(v, 0),
+                                _mm256_extracti128_si256(v, 1));
+    };
+
+    auto R = from_fixed15(r),
+         G = from_fixed15(g),
+         B = from_fixed15(b),
+         A = from_fixed15(a);
+
+    auto rg_01234567 = _mm_unpacklo_epi8(R,G),  // rg0 rg1 rg2 ... rg7
+         rg_89ABCDEF = _mm_unpackhi_epi8(R,G),  // rg8 rg9 rgA ... rgF
+         ba_01234567 = _mm_unpacklo_epi8(B,A),
+         ba_89ABCDEF = _mm_unpackhi_epi8(B,A);
+    _mm_storeu_si128((__m128i*)ptr + 0, _mm_unpacklo_epi16(rg_01234567, ba_01234567));
+    _mm_storeu_si128((__m128i*)ptr + 1, _mm_unpackhi_epi16(rg_01234567, ba_01234567));
+    _mm_storeu_si128((__m128i*)ptr + 2, _mm_unpacklo_epi16(rg_89ABCDEF, ba_89ABCDEF));
+    _mm_storeu_si128((__m128i*)ptr + 3, _mm_unpackhi_epi16(rg_89ABCDEF, ba_89ABCDEF));
+#endif
+}
diff --git a/src/splicer/build_stages.py b/src/splicer/build_stages.py
index f124c64..f0cedf2 100755
--- a/src/splicer/build_stages.py
+++ b/src/splicer/build_stages.py
@@ -15,6 +15,9 @@
 subprocess.check_call(['clang++'] + cflags + hsw +
                       ['-c', 'src/splicer/SkSplicer_stages.cpp'] +
                       ['-o', 'hsw.o'])
+subprocess.check_call(['clang++'] + cflags + hsw +
+                      ['-c', 'src/splicer/SkSplicer_stages_lowp.cpp'] +
+                      ['-o', 'hsw_lowp.o'])
 
 aarch64 = [
     '--target=aarch64-linux-android',
@@ -24,6 +27,9 @@
 subprocess.check_call(['clang++'] + cflags + aarch64 +
                       ['-c', 'src/splicer/SkSplicer_stages.cpp'] +
                       ['-o', 'aarch64.o'])
+subprocess.check_call(['clang++'] + cflags + aarch64 +
+                      ['-c', 'src/splicer/SkSplicer_stages_lowp.cpp'] +
+                      ['-o', 'aarch64_lowp.o'])
 
 armv7 = [
     '--target=arm-linux-androideabi',
@@ -35,8 +41,11 @@
 subprocess.check_call(['clang++'] + cflags + armv7 +
                       ['-c', 'src/splicer/SkSplicer_stages.cpp'] +
                       ['-o', 'armv7.o'])
+subprocess.check_call(['clang++'] + cflags + armv7 +
+                      ['-c', 'src/splicer/SkSplicer_stages_lowp.cpp'] +
+                      ['-o', 'armv7_lowp.o'])
 
-def parse_object_file(dot_o, array_type, done, target=None):
+def parse_object_file(dst, dot_o, array_type, done, target=None):
   cmd = ['gobjdump', '-d', dot_o]
   if target:
     cmd += ['--target', target]
@@ -48,7 +57,7 @@
     # E.g. 00000000000003a4 <_load_f16>:
     m = re.match('''[0-9a-f]+ <_?(.*)>:''', line)
     if m:
-      print 'static const', array_type, 'kSplice_' + m.group(1) + '[] = {'
+      print >>dst,'static const', array_type, 'kSplice_' + m.group(1) + '[] = {'
       continue
 
     columns = line.split('\t')
@@ -65,33 +74,35 @@
       assert 'rip' not in arg  # TODO: detect on aarch64 too
 
     if code == done:
-      print '};'
+      print >>dst,'};'
       continue
 
     hexed = ''.join('0x'+x+',' for x in code.split(' '))
-    print '    ' + hexed + ' '*(44-len(hexed)) + \
-          '//  ' + inst  + ' '*(14-len(inst))  + args
+    print >>dst,'    ' + hexed + ' '*(44-len(hexed)) + \
+                '//  ' + inst  + ' '*(14-len(inst))  + args
 
-print '''/*
+for suffix in ['', '_lowp']:
+  with open('src/splicer/SkSplicer_generated%s.h' % suffix, 'w') as f:
+    print >>f,'''/*
  * Copyright 2017 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
-#ifndef SkSplicer_generated_DEFINED
-#define SkSplicer_generated_DEFINED
+#ifndef SkSplicer_generated%s_DEFINED
+#define SkSplicer_generated%s_DEFINED
 
 // This file is generated semi-automatically with this command:
-//   $ src/splicer/build_stages.py > src/splicer/SkSplicer_generated.h
+//   $ src/splicer/build_stages.py
 
 #if defined(__aarch64__)
-'''
-parse_object_file('aarch64.o', 'unsigned int', '14000000')
-print '\n#elif defined(__ARM_NEON__)\n'
-parse_object_file('armv7.o', 'unsigned int', 'eafffffe',
-                  target='elf32-littlearm')
-print '\n#else\n'
-parse_object_file('hsw.o', 'unsigned char', 'e9 00 00 00 00')
-print '\n#endif\n'
-print '#endif//SkSplicer_generated_DEFINED'
+''' % (suffix, suffix)
+    parse_object_file(f, 'aarch64%s.o' % suffix, 'unsigned int', '14000000')
+    print >>f,'\n#elif defined(__ARM_NEON__)\n'
+    parse_object_file(f, 'armv7%s.o' % suffix, 'unsigned int', 'eafffffe',
+                    target='elf32-littlearm')
+    print >>f,'\n#else\n'
+    parse_object_file(f, 'hsw%s.o' % suffix, 'unsigned char', 'e9 00 00 00 00')
+    print >>f,'\n#endif\n'
+    print >>f,'#endif//SkSplicer_generated%s_DEFINED' % suffix