diff --git a/mace/BUILD b/mace/BUILD
index 2ee799919ace663dde4b6114ce37fb5b2cd002c3..cf2e1e2d1963514b7f2e1c2a4f06f294f9970d21 100644
--- a/mace/BUILD
+++ b/mace/BUILD
@@ -59,3 +59,11 @@ config_setting(
     },
     visibility = ["//visibility:public"],
 )
+
+config_setting(
+    name = "quantize_enabled",
+    define_values = {
+        "quantize": "true",
+    },
+    visibility = ["//visibility:public"],
+)
diff --git a/mace/core/BUILD b/mace/core/BUILD
index 16db0e187be7e6df69db6afbdc2f997679f8458f..c979feccb22c86be12a0f7c6d9284b466e4be27d 100644
--- a/mace/core/BUILD
+++ b/mace/core/BUILD
@@ -15,6 +15,7 @@ load(
     "if_openmp_enabled",
     "if_neon_enabled",
     "if_opencl_enabled",
+    "if_quantize_enabled",
 )
 
 cc_library(
@@ -51,6 +52,8 @@ cc_library(
         "-DMACE_ENABLE_OPENMP",
     ]) + if_opencl_enabled([
         "-DMACE_ENABLE_OPENCL",
+    ]) + if_quantize_enabled([
+        "-DMACE_ENABLE_QUANTIZE",
     ]) + if_hexagon_enabled([
         "-DMACE_ENABLE_HEXAGON",
     ]) + if_neon_enabled([
@@ -64,11 +67,12 @@ cc_library(
         "//mace/codegen:generated_version",
         "//mace/proto:mace_cc",
         "//mace/utils",
-        "@gemmlowp",
     ] + if_opencl_enabled([
         ":opencl_headers",
         "//mace/codegen:generated_opencl",
         "@half//:half",
+    ]) + if_quantize_enabled([
+        "@gemmlowp",
     ]) + if_hexagon_enabled([
         "//third_party/nnlib:libhexagon",
     ]),
diff --git a/mace/core/runtime/cpu/cpu_runtime.cc b/mace/core/runtime/cpu/cpu_runtime.cc
index ae168a547090c5e133f32b714d6d80f77b374987..789f2a5c1e2ccf0f87f8fbf03c71a22d2dec76cf 100644
--- a/mace/core/runtime/cpu/cpu_runtime.cc
+++ b/mace/core/runtime/cpu/cpu_runtime.cc
@@ -176,11 +176,16 @@ MaceStatus SetOpenMPThreadsAndAffinityCPUs(int omp_num_threads,
 MaceStatus CPURuntime::SetOpenMPThreadsAndAffinityPolicy(
     int omp_num_threads_hint,
     CPUAffinityPolicy policy,
-    gemmlowp::GemmContext *gemm_context) {
+    void *gemm_context) {
   if (policy == CPUAffinityPolicy::AFFINITY_NONE) {
+#ifdef MACE_ENABLE_QUANTIZE
     if (gemm_context) {
-      gemm_context->set_max_num_threads(std::max(0, omp_num_threads_hint));
+      static_cast<gemmlowp::GemmContext*>(gemm_context)->set_max_num_threads(
+          std::max(0, omp_num_threads_hint));
     }
+#else
+    MACE_UNUSED(gemm_context);
+#endif  // MACE_ENABLE_QUANTIZE
 #ifdef MACE_ENABLE_OPENMP
     if (omp_num_threads_hint > 0) {
       omp_set_num_threads(std::min(omp_num_threads_hint, omp_get_num_procs()));
@@ -210,9 +215,12 @@ MaceStatus CPURuntime::SetOpenMPThreadsAndAffinityPolicy(
     omp_num_threads_hint = use_cpu_ids.size();
   }
 
+#ifdef MACE_ENABLE_QUANTIZE
   if (gemm_context) {
-    gemm_context->set_max_num_threads(omp_num_threads_hint);
+    static_cast<gemmlowp::GemmContext*>(gemm_context)->set_max_num_threads(
+        omp_num_threads_hint);
   }
+#endif  // MACE_ENABLE_QUANTIZE
 
   return SetOpenMPThreadsAndAffinityCPUs(omp_num_threads_hint, use_cpu_ids);
 }
diff --git a/mace/core/runtime/cpu/cpu_runtime.h b/mace/core/runtime/cpu/cpu_runtime.h
index a6926e9e1e1198a704fa68d119111ea70c701079..00fd492b0923184af070400ce0749ff6e29ee3b8 100644
--- a/mace/core/runtime/cpu/cpu_runtime.h
+++ b/mace/core/runtime/cpu/cpu_runtime.h
@@ -18,7 +18,11 @@
 #include <memory>
 #include <vector>
 
+#ifdef MACE_ENABLE_QUANTIZE
 #include "public/gemmlowp.h"
+#endif  // MACE_ENABLE_QUANTIZE
+
+#include "mace/core/macros.h"
 #include "mace/public/mace.h"
 #include "mace/utils/logging.h"
 
@@ -34,22 +38,34 @@ class CPURuntime {
       : num_threads_(num_threads),
         policy_(policy),
         gemm_context_(nullptr) {
+#ifdef MACE_ENABLE_QUANTIZE
     if (use_gemmlowp) {
       MACE_CHECK_NOTNULL(GetGemmlowpContext());
     }
-
+#else
+    MACE_UNUSED(use_gemmlowp);
+#endif  // MACE_ENABLE_QUANTIZE
     SetOpenMPThreadsAndAffinityPolicy(num_threads_,
                                       policy_,
-                                      gemm_context_.get());
+                                      gemm_context_);
+  }
+
+#ifdef MACE_ENABLE_QUANTIZE
+  ~CPURuntime() {
+    if (!gemm_context_) {
+      delete static_cast<gemmlowp::GemmContext*>(gemm_context_);
+    }
   }
-  ~CPURuntime() = default;
 
   gemmlowp::GemmContext *GetGemmlowpContext() {
     if (!gemm_context_) {
-      gemm_context_.reset(new gemmlowp::GemmContext());
+      gemm_context_ = new gemmlowp::GemmContext();
     }
-    return gemm_context_.get();
+    return static_cast<gemmlowp::GemmContext*>(gemm_context_);
   }
+#else
+  ~CPURuntime() = default;
+#endif  // MACE_ENABLE_QUANTIZE
 
   int num_threads() const {
     return num_threads_;
@@ -67,11 +83,11 @@ class CPURuntime {
   MaceStatus SetOpenMPThreadsAndAffinityPolicy(
       int omp_num_threads_hint,
       CPUAffinityPolicy policy,
-      gemmlowp::GemmContext *gemm_context);
+      void *gemm_context);
 
   int num_threads_;
   CPUAffinityPolicy policy_;
-  std::unique_ptr<gemmlowp::GemmContext> gemm_context_;
+  void *gemm_context_;
 };
 }  // namespace mace
 
diff --git a/mace/libmace/BUILD b/mace/libmace/BUILD
index d227f259fb8b6195a708b2edee21193c3e006086..48312e8cc4beaa82cf5c04b2cef51e935401f738 100644
--- a/mace/libmace/BUILD
+++ b/mace/libmace/BUILD
@@ -16,6 +16,7 @@ load(
     "if_hexagon_enabled",
     "if_opencl_enabled",
     "if_opencl_enabled_str",
+    "if_quantize_enabled",
 )
 
 cc_library(
@@ -34,6 +35,8 @@ cc_library(
         "-mfloat-abi=softfp",
     ]) + if_opencl_enabled([
         "-DMACE_ENABLE_OPENCL",
+    ]) + if_quantize_enabled([
+        "-DMACE_ENABLE_QUANTIZE",
     ]) + if_hexagon_enabled([
         "-DMACE_ENABLE_HEXAGON",
     ]),
diff --git a/mace/mace.bzl b/mace/mace.bzl
index 3b91e44effb0ce17863a255851766278d9de053c..a7a6bc89454a847deb9fc0c832eac964dd90d429 100644
--- a/mace/mace.bzl
+++ b/mace/mace.bzl
@@ -60,6 +60,12 @@ def if_opencl_enabled_str(a):
       "//conditions:default": "",
   })
 
+def if_quantize_enabled(a):
+  return select({
+      "//mace:quantize_enabled": a,
+      "//conditions:default": [],
+  })
+
 def mace_version_genrule():
   native.genrule(
       name = "mace_version_gen",
diff --git a/mace/ops/BUILD b/mace/ops/BUILD
index bfdf85a5b051efa3df099ae776c90a1247334193..c0d4fbeda8aab9023583a67492dacbe4e2e7107f 100644
--- a/mace/ops/BUILD
+++ b/mace/ops/BUILD
@@ -14,6 +14,7 @@ load(
     "if_android_armv7",
     "if_hexagon_enabled",
     "if_opencl_enabled",
+    "if_quantize_enabled",
 )
 
 cc_library(
@@ -33,6 +34,7 @@ cc_library(
             "buffer_transform.cc",
             "lstm_cell.cc",
             "winograd_transform.cc",
+            "quantize.cc",
         ],
     ) + if_opencl_enabled(glob(
         [
@@ -47,6 +49,10 @@ cc_library(
         exclude = [
             "opencl/*_test.cc",
         ],
+    )) + if_quantize_enabled(glob(
+        [
+            "quantize.cc",
+        ],
     )),
     hdrs = glob(
         [
@@ -56,11 +62,16 @@ cc_library(
         exclude = [
             "ops_registry.h",
             "ops_test_util.h",
+            "fixpoint.h",
+            "gemmlowp_util.h",
         ]
     ) + if_opencl_enabled(glob([
         "opencl/*.h",
         "opencl/image/*.h",
         "opencl/buffer/*.h",
+    ])) + if_quantize_enabled(glob([
+        "fixpoint.h",
+        "gemmlowp_util.h",
     ])),
     copts = [
         "-Werror",
@@ -76,15 +87,18 @@ cc_library(
         "-mfloat-abi=softfp",
     ]) + if_opencl_enabled([
         "-DMACE_ENABLE_OPENCL",
+    ]) + if_quantize_enabled([
+        "-DMACE_ENABLE_QUANTIZE",
     ]) + if_hexagon_enabled([
         "-DMACE_ENABLE_HEXAGON",
     ]),
     linkopts = if_android(["-lm"]),
     deps = [
         "//mace/core",
-        "@gemmlowp",
         "@tflite",
-    ],
+    ] + if_quantize_enabled([
+        "@gemmlowp",
+    ]),
 )
 
 
@@ -110,6 +124,8 @@ cc_library(
         "-mfloat-abi=softfp",
     ]) + if_opencl_enabled([
         "-DMACE_ENABLE_OPENCL",
+    ]) + if_quantize_enabled([
+        "-DMACE_ENABLE_QUANTIZE",
     ]) + if_hexagon_enabled([
         "-DMACE_ENABLE_HEXAGON",
     ]),
@@ -157,7 +173,15 @@ cc_test(
             "arm/*_test.cc",
             "opencl/*_test.cc",
         ],
-    ),
+        exclude = [
+            "fixpoint_test.cc"
+        ],
+    ) + if_quantize_enabled(glob(
+        [
+            "fixpoint_test.cc"
+        ],
+
+    )),
     copts = [
         "-Werror",
         "-Wextra",
@@ -171,6 +195,8 @@ cc_test(
         "-mfloat-abi=softfp",
     ]) + if_opencl_enabled([
         "-DMACE_ENABLE_OPENCL",
+    ]) + if_quantize_enabled([
+        "-DMACE_ENABLE_QUANTIZE",
     ]) + if_hexagon_enabled([
         "-DMACE_ENABLE_HEXAGON",
     ]),
@@ -199,6 +225,8 @@ cc_test(
         "-mfloat-abi=softfp",
     ]) + if_opencl_enabled([
         "-DMACE_ENABLE_OPENCL",
+    ]) + if_quantize_enabled([
+        "-DMACE_ENABLE_QUANTIZE",
     ]) + if_hexagon_enabled([
         "-DMACE_ENABLE_HEXAGON",
     ]),
@@ -208,6 +236,5 @@ cc_test(
         "test",
         "//mace/core:test_benchmark_main",
         "//third_party/eigen3",
-        "@gemmlowp",
     ],
 )
diff --git a/mace/ops/concat.cc b/mace/ops/concat.cc
index 0cebac68392711cffc6af26faf8906f97fdc01d1..f4c7ebbefac649e87af26a1a295f5613e171a4a7 100644
--- a/mace/ops/concat.cc
+++ b/mace/ops/concat.cc
@@ -108,6 +108,7 @@ class ConcatOp<DeviceType::CPU, T> : public ConcatOpBase {
   }
 };
 
+#ifdef MACE_ENABLE_QUANTIZE
 template <>
 class ConcatOp<DeviceType::CPU, uint8_t> : public ConcatOpBase {
  public:
@@ -177,6 +178,7 @@ class ConcatOp<DeviceType::CPU, uint8_t> : public ConcatOpBase {
     return MaceStatus::MACE_SUCCESS;
   }
 };
+#endif  // MACE_ENABLE_QUANTIZE
 
 #ifdef MACE_ENABLE_OPENCL
 template <typename T>
@@ -209,8 +211,10 @@ void RegisterConcat(OpRegistryBase *op_registry) {
   MACE_REGISTER_OP(op_registry, "Concat", ConcatOp,
                    DeviceType::CPU, int32_t);
 
+#ifdef MACE_ENABLE_QUANTIZE
   MACE_REGISTER_OP(op_registry, "Concat", ConcatOp,
                    DeviceType::CPU, uint8_t);
+#endif  // MACE_ENABLE_QUANTIZE
 
 #ifdef MACE_ENABLE_OPENCL
   MACE_REGISTER_OP(op_registry, "Concat", ConcatOp,
diff --git a/mace/ops/conv_2d.cc b/mace/ops/conv_2d.cc
index 74234b5ee15a2dec2e9fc5812bcd87656ebb585e..af459b2bb3e9d730dc111f7a46615f5c452e405d 100644
--- a/mace/ops/conv_2d.cc
+++ b/mace/ops/conv_2d.cc
@@ -31,8 +31,12 @@
 #include "mace/ops/arm/conv_winograd.h"
 #include "mace/ops/conv_pool_2d_base.h"
 #include "mace/ops/conv_pool_2d_util.h"
-#include "mace/ops/gemmlowp_util.h"
 #include "mace/utils/utils.h"
+
+#ifdef MACE_ENABLE_QUANTIZE
+#include "mace/ops/gemmlowp_util.h"
+#endif  // MACE_ENABLE_QUANTIZE
+
 #ifdef MACE_ENABLE_OPENCL
 #include "mace/ops/opencl/image/conv_2d.h"
 #include "mace/ops/opencl/buffer/conv_2d.h"
@@ -707,6 +711,7 @@ class Conv2dOp<DeviceType::CPU, float> : public ConvPool2dOpBase {
 };
 
 
+#ifdef MACE_ENABLE_QUANTIZE
 template <>
 class Conv2dOp<DeviceType::CPU, uint8_t> : public ConvPool2dOpBase {
  public:
@@ -943,6 +948,7 @@ class Conv2dOp<DeviceType::CPU, uint8_t> : public ConvPool2dOpBase {
   MACE_OP_INPUT_TAGS(INPUT, FILTER, BIAS);
   MACE_OP_OUTPUT_TAGS(OUTPUT);
 };
+#endif  // MACE_ENABLE_QUANTIZE
 
 #ifdef MACE_ENABLE_OPENCL
 template <typename T>
@@ -987,8 +993,10 @@ void RegisterConv2D(OpRegistryBase *op_registry) {
   MACE_REGISTER_OP(op_registry, "Conv2D", Conv2dOp,
                    DeviceType::CPU, float);
 
+#ifdef MACE_ENABLE_QUANTIZE
   MACE_REGISTER_OP(op_registry, "Conv2D", Conv2dOp,
                    DeviceType::CPU, uint8_t);
+#endif  // MACE_ENABLE_QUANTIZE
 
 #ifdef MACE_ENABLE_OPENCL
   MACE_REGISTER_OP(op_registry, "Conv2D", Conv2dOp,
diff --git a/mace/ops/depthwise_conv2d.cc b/mace/ops/depthwise_conv2d.cc
index 76eee2f227e87365fdaa4d359bae776e16c02ca1..1f1dd1363770d18c0d590742cba7de7f5ec8d29e 100644
--- a/mace/ops/depthwise_conv2d.cc
+++ b/mace/ops/depthwise_conv2d.cc
@@ -20,9 +20,11 @@
 #include <string>
 #include <vector>
 
+#ifdef MACE_ENABLE_QUANTIZE
 // We reuse TensorFlow Lite's optimized depthwiseconv_uint8 and parallelized it
 // using OpenMP for MACE's quantized depthwise_conv2d.
 #include "tensorflow/contrib/lite/kernels/internal/optimized/depthwiseconv_uint8.h"
+#endif  // MACE_ENABLE_QUANTIZE
 
 #include "mace/core/future.h"
 #include "mace/core/operator.h"
@@ -276,6 +278,7 @@ class DepthwiseConv2dOp<DeviceType::CPU, float> : public DepthwiseConv2dOpBase {
   MACE_OP_OUTPUT_TAGS(OUTPUT);
 };
 
+#ifdef MACE_ENABLE_QUANTIZE
 template <>
 class DepthwiseConv2dOp<DeviceType::CPU, uint8_t>
     : public DepthwiseConv2dOpBase {
@@ -479,6 +482,7 @@ class DepthwiseConv2dOp<DeviceType::CPU, uint8_t>
   MACE_OP_INPUT_TAGS(INPUT, FILTER, BIAS);
   MACE_OP_OUTPUT_TAGS(OUTPUT);
 };
+#endif  // MACE_ENABLE_QUANTIZE
 
 #ifdef MACE_ENABLE_OPENCL
 template <typename T>
@@ -520,8 +524,10 @@ void RegisterDepthwiseConv2d(OpRegistryBase *op_registry) {
   MACE_REGISTER_OP(op_registry, "DepthwiseConv2d",
                    DepthwiseConv2dOp, DeviceType::CPU, float);
 
+#ifdef MACE_ENABLE_QUANTIZE
   MACE_REGISTER_OP(op_registry, "DepthwiseConv2d",
                    DepthwiseConv2dOp, DeviceType::CPU, uint8_t);
+#endif  // MACE_ENABLE_QUANTIZE
 
 #ifdef MACE_ENABLE_OPENCL
   MACE_REGISTER_OP(op_registry, "DepthwiseConv2d",
diff --git a/mace/ops/eltwise.cc b/mace/ops/eltwise.cc
index 9bca9033cbb601aa3686d0be633f5fcdea2035d7..cfd0bdba91d2a5efe91ea5b407cc461bbd1aaeef 100644
--- a/mace/ops/eltwise.cc
+++ b/mace/ops/eltwise.cc
@@ -932,6 +932,7 @@ class EltwiseOp : public Operation {
   Tensor scalar_tensor_;
 };
 
+#ifdef MACE_ENABLE_QUANTIZE
 template <>
 class EltwiseOp<DeviceType::CPU, uint8_t> : public Operation {
  public:
@@ -1072,6 +1073,7 @@ class EltwiseOp<DeviceType::CPU, uint8_t> : public Operation {
   DataFormat data_format_;
   Tensor scalar_tensor_;
 };
+#endif  // MACE_ENABLE_QUANTIZE
 
 #ifdef MACE_ENABLE_OPENCL
 template <typename T>
@@ -1113,8 +1115,11 @@ void RegisterEltwise(OpRegistryBase *op_registry) {
   MACE_REGISTER_OP(op_registry, "Eltwise", EltwiseOp,
                    DeviceType::CPU, int32_t);
 
+#ifdef MACE_ENABLE_QUANTIZE
   MACE_REGISTER_OP(op_registry, "Eltwise", EltwiseOp,
                    DeviceType::CPU, uint8_t);
+#endif  // MACE_ENABLE_QUANTIZE
+
 #ifdef MACE_ENABLE_OPENCL
   MACE_REGISTER_OP(op_registry, "Eltwise", EltwiseOp,
                    DeviceType::GPU, float);
diff --git a/mace/ops/expand_dims.cc b/mace/ops/expand_dims.cc
index a912e0c9b3ca1379e0579e90662b49d586d86208..74551687c7358628b9f2fb9fdfde37dfdfa37012 100644
--- a/mace/ops/expand_dims.cc
+++ b/mace/ops/expand_dims.cc
@@ -63,8 +63,10 @@ void RegisterExpandDims(OpRegistryBase *op_registry) {
   MACE_REGISTER_OP(op_registry, "ExpandDims", ExpandDimsOp,
                    DeviceType::CPU, int32_t);
 
+#ifdef MACE_ENABLE_QUANTIZE
   MACE_REGISTER_OP(op_registry, "ExpandDims", ExpandDimsOp,
                    DeviceType::CPU, uint8_t);
+#endif  // MACE_ENABLE_QUANTIZE
 }
 
 }  // namespace ops
diff --git a/mace/ops/fully_connected.cc b/mace/ops/fully_connected.cc
index c5a8872b361a53a76715f7f57f6e06ea83b6a638..3705e415e59ce17a92da48f5535fe7845d232e3f 100644
--- a/mace/ops/fully_connected.cc
+++ b/mace/ops/fully_connected.cc
@@ -21,7 +21,10 @@
 #include "mace/core/tensor.h"
 #include "mace/ops/activation.h"
 #include "mace/ops/gemm.h"
+
+#ifdef MACE_ENABLE_QUANTIZE
 #include "mace/ops/gemmlowp_util.h"
+#endif  // MACE_ENABLE_QUANTIZE
 
 #ifdef MACE_ENABLE_OPENCL
 #include "mace/ops/opencl/image/fully_connected.h"
@@ -106,6 +109,7 @@ class FullyConnectedOp<DeviceType::CPU, float> : public FullyConnectedOpBase {
   }
 };
 
+#ifdef MACE_ENABLE_QUANTIZE
 template <>
 class FullyConnectedOp<DeviceType::CPU, uint8_t>
     : public FullyConnectedOpBase {
@@ -180,6 +184,7 @@ class FullyConnectedOp<DeviceType::CPU, uint8_t>
     return MaceStatus::MACE_SUCCESS;
   }
 };
+#endif  // MACE_ENABLE_QUANTIZE
 
 #ifdef MACE_ENABLE_OPENCL
 template <typename T>
@@ -218,8 +223,11 @@ void RegisterFullyConnected(OpRegistryBase *op_registry) {
   MACE_REGISTER_OP(op_registry, "FullyConnected",
                    FullyConnectedOp, DeviceType::CPU, float);
 
+#ifdef MACE_ENABLE_QUANTIZE
   MACE_REGISTER_OP(op_registry, "FullyConnected",
                    FullyConnectedOp, DeviceType::CPU, uint8_t);
+#endif  // MACE_ENABLE_QUANTIZE
+
 #ifdef MACE_ENABLE_OPENCL
   MACE_REGISTER_OP(op_registry, "FullyConnected",
                    FullyConnectedOp, DeviceType::GPU, float);
diff --git a/mace/ops/gather.cc b/mace/ops/gather.cc
index 4357e466df43c6c9e7d5338fdd80a897f79d828f..1af56d7edf8bd11c53c7db816ea636b2d0ff06fa 100644
--- a/mace/ops/gather.cc
+++ b/mace/ops/gather.cc
@@ -89,8 +89,11 @@ class GatherOp : public Operation {
 void RegisterGather(OpRegistryBase *op_registry) {
   MACE_REGISTER_OP(op_registry, "Gather", GatherOp,
                    DeviceType::CPU, float);
+
+#ifdef MACE_ENABLE_QUANTIZE
   MACE_REGISTER_OP(op_registry, "Gather", GatherOp,
                    DeviceType::CPU, uint8_t);
+#endif  // MACE_ENABLE_QUANTIZE
 }
 
 }  // namespace ops
diff --git a/mace/ops/matmul.cc b/mace/ops/matmul.cc
index 8608657e018ddae1bab64ffe34f062f152c0c213..af88dd85dc8be35d17b99832735a6b092f35c883 100644
--- a/mace/ops/matmul.cc
+++ b/mace/ops/matmul.cc
@@ -22,9 +22,13 @@
 #include "mace/core/operator.h"
 #include "mace/core/tensor.h"
 #include "mace/ops/gemm.h"
-#include "mace/ops/gemmlowp_util.h"
 #include "mace/ops/sgemm.h"
 #include "mace/utils/utils.h"
+
+#ifdef MACE_ENABLE_QUANTIZE
+#include "mace/ops/gemmlowp_util.h"
+#endif  // MACE_ENABLE_QUANTIZE
+
 #ifdef MACE_ENABLE_OPENCL
 #include "mace/ops/opencl/image/matmul.h"
 #endif  // MACE_ENABLE_OPENCL
@@ -150,6 +154,7 @@ class MatMulOp<CPU, float> : public MatMulOpBase {
   SGemm sgemm_;
 };
 
+#ifdef MACE_ENABLE_QUANTIZE
 template<gemmlowp::MapOrder AOrder, gemmlowp::MapOrder BOrder,
     typename OutputType>
 class MatMulFixpointImpl;
@@ -311,6 +316,7 @@ class MatMulOp<DeviceType::CPU, uint8_t>: public MatMulOpBase {
     return MaceStatus::MACE_SUCCESS;
   }
 };
+#endif  // MACE_ENABLE_QUANTIZE
 
 #ifdef MACE_ENABLE_OPENCL
 template <typename T>
@@ -342,8 +348,11 @@ void RegisterMatMul(OpRegistryBase *op_registry) {
   MACE_REGISTER_OP(op_registry, "MatMul", MatMulOp,
                    DeviceType::CPU, float);
 
+#ifdef MACE_ENABLE_QUANTIZE
   MACE_REGISTER_OP(op_registry, "MatMul", MatMulOp,
                    DeviceType::CPU, uint8_t);
+#endif  // MACE_ENABLE_QUANTIZE
+
 #ifdef MACE_ENABLE_OPENCL
   MACE_REGISTER_OP(op_registry, "MatMul", MatMulOp,
                    DeviceType::GPU, float);
diff --git a/mace/ops/ops_registry.cc b/mace/ops/ops_registry.cc
index bd3038c5244f306112e05d52e95f69d6e51add9f..48a893760a8789fb8f831774726332d55e17a922 100644
--- a/mace/ops/ops_registry.cc
+++ b/mace/ops/ops_registry.cc
@@ -33,7 +33,6 @@ extern void RegisterDeconv2D(OpRegistryBase *op_registry);
 extern void RegisterDepthToSpace(OpRegistryBase *op_registry);
 extern void RegisterDepthwiseConv2d(OpRegistryBase *op_registry);
 extern void RegisterDepthwiseDeconv2d(OpRegistryBase *op_registry);
-extern void RegisterDequantize(OpRegistryBase *op_registry);
 extern void RegisterEltwise(OpRegistryBase *op_registry);
 extern void RegisterExpandDims(OpRegistryBase *op_registry);
 extern void RegisterFill(OpRegistryBase *op_registry);
@@ -45,7 +44,6 @@ extern void RegisterLocalResponseNorm(OpRegistryBase *op_registry);
 extern void RegisterMatMul(OpRegistryBase *op_registry);
 extern void RegisterPad(OpRegistryBase *op_registry);
 extern void RegisterPooling(OpRegistryBase *op_registry);
-extern void RegisterQuantize(OpRegistryBase *op_registry);
 extern void RegisterReduceMean(OpRegistryBase *op_registry);
 extern void RegisterReshape(OpRegistryBase *op_registry);
 extern void RegisterResizeBicubic(OpRegistryBase *op_registry);
@@ -64,6 +62,11 @@ extern void RegisterStridedSlice(OpRegistryBase *op_registry);
 extern void RegisterTranspose(OpRegistryBase *op_registry);
 extern void RegisterUnstack(OpRegistryBase *op_registry);
 
+#ifdef MACE_ENABLE_QUANTIZE
+extern void RegisterDequantize(OpRegistryBase *op_registry);
+extern void RegisterQuantize(OpRegistryBase *op_registry);
+#endif  // MACE_ENABLE_QUANTIZE
+
 #ifdef MACE_ENABLE_OPENCL
 extern void RegisterBufferTransform(OpRegistryBase *op_registry);
 extern void RegisterBufferInverseTransform(OpRegistryBase *op_registry);
@@ -91,7 +94,6 @@ OpRegistry::OpRegistry() : OpRegistryBase() {
   ops::RegisterDepthToSpace(this);
   ops::RegisterDepthwiseConv2d(this);
   ops::RegisterDepthwiseDeconv2d(this);
-  ops::RegisterDequantize(this);
   ops::RegisterEltwise(this);
   ops::RegisterExpandDims(this);
   ops::RegisterFill(this);
@@ -103,7 +105,6 @@ OpRegistry::OpRegistry() : OpRegistryBase() {
   ops::RegisterMatMul(this);
   ops::RegisterPad(this);
   ops::RegisterPooling(this);
-  ops::RegisterQuantize(this);
   ops::RegisterReduceMean(this);
   ops::RegisterReshape(this);
   ops::RegisterResizeBicubic(this);
@@ -122,6 +123,11 @@ OpRegistry::OpRegistry() : OpRegistryBase() {
   ops::RegisterTranspose(this);
   ops::RegisterUnstack(this);
 
+#ifdef MACE_ENABLE_QUANTIZE
+  ops::RegisterDequantize(this);
+  ops::RegisterQuantize(this);
+#endif  // MACE_ENABLE_QUANTIZE
+
 #ifdef MACE_ENABLE_OPENCL
   ops::RegisterBufferTransform(this);
   ops::RegisterBufferInverseTransform(this);
diff --git a/mace/ops/pooling.cc b/mace/ops/pooling.cc
index e1800b87254ff2d220e6939ea4986260bfd3d908..5f9d0e0d7641217e156e3d071e8f521eda95af8b 100644
--- a/mace/ops/pooling.cc
+++ b/mace/ops/pooling.cc
@@ -214,6 +214,7 @@ class PoolingOp<DeviceType::CPU, float> : public PoolingOpBase {
   }
 };
 
+#ifdef MACE_ENABLE_QUANTIZE
 template <>
 class PoolingOp<DeviceType::CPU, uint8_t> : public PoolingOpBase {
  public:
@@ -420,6 +421,7 @@ class PoolingOp<DeviceType::CPU, uint8_t> : public PoolingOpBase {
     }
   }
 };
+#endif  // MACE_ENABLE_QUANTIZE
 
 #ifdef MACE_ENABLE_OPENCL
 template <typename T>
@@ -451,8 +453,11 @@ class PoolingOp<DeviceType::GPU, T> : public PoolingOpBase {
 void RegisterPooling(OpRegistryBase *op_registry) {
   MACE_REGISTER_OP(op_registry, "Pooling", PoolingOp,
                    DeviceType::CPU, float);
+
+#ifdef MACE_ENABLE_QUANTIZE
   MACE_REGISTER_OP(op_registry, "Pooling", PoolingOp,
                    DeviceType::CPU, uint8_t);
+#endif  // MACE_ENABLE_QUANTIZE
 
 #ifdef MACE_ENABLE_OPENCL
   MACE_REGISTER_OP(op_registry, "Pooling", PoolingOp,
diff --git a/mace/ops/resize_bilinear.cc b/mace/ops/resize_bilinear.cc
index 4b3f5a0917de5d82fd33924712625190c19da9ee..91f6c3e5ccf491755d98cae03f8bf32910fde31e 100644
--- a/mace/ops/resize_bilinear.cc
+++ b/mace/ops/resize_bilinear.cc
@@ -244,6 +244,7 @@ class ResizeBilinearOp<DeviceType::CPU, T> : public Operation {
   std::vector<index_t> size_;
 };
 
+#ifdef MACE_ENABLE_QUANTIZE
 template <>
 class ResizeBilinearOp<DeviceType::CPU, uint8_t> : public Operation {
  public:
@@ -317,6 +318,7 @@ class ResizeBilinearOp<DeviceType::CPU, uint8_t> : public Operation {
   bool align_corners_;
   std::vector<index_t> size_;
 };
+#endif  // MACE_ENABLE_QUANTIZE
 
 #ifdef MACE_ENABLE_OPENCL
 template <typename T>
@@ -355,8 +357,10 @@ void RegisterResizeBilinear(OpRegistryBase *op_registry) {
   MACE_REGISTER_OP(op_registry, "ResizeBilinear", ResizeBilinearOp,
                    DeviceType::CPU, float);
 
+#ifdef MACE_ENABLE_QUANTIZE
   MACE_REGISTER_OP(op_registry, "ResizeBilinear", ResizeBilinearOp,
                    DeviceType::CPU, uint8_t);
+#endif  // MACE_ENABLE_QUANTIZE
 
 #ifdef MACE_ENABLE_OPENCL
   MACE_REGISTER_OP(op_registry, "ResizeBilinear", ResizeBilinearOp,
diff --git a/mace/ops/softmax.cc b/mace/ops/softmax.cc
index 8f6fb7fd24ff94c04fb38ef585f94e167d555a59..6d62fabc9781838007b9a6d8db8a629b47cfdb40 100644
--- a/mace/ops/softmax.cc
+++ b/mace/ops/softmax.cc
@@ -18,8 +18,12 @@
 #include <vector>
 
 #include "mace/core/operator.h"
+
+#ifdef MACE_ENABLE_QUANTIZE
 #include "mace/ops/fixpoint.h"
 #include "mace/ops/gemmlowp_util.h"
+#endif  // MACE_ENABLE_QUANTIZE
+
 #ifdef MACE_ENABLE_OPENCL
 #include "mace/ops/opencl/image/softmax.h"
 #include "mace/ops/opencl/buffer/softmax.h"
@@ -122,6 +126,7 @@ class SoftmaxOp<DeviceType::CPU, float> : public Operation {
 static const int kInputDeltaIntBits = 6;
 static const int kSumExpIntBits = 12;
 
+#ifdef MACE_ENABLE_QUANTIZE
 template <>
 class SoftmaxOp<DeviceType::CPU, uint8_t> : public Operation {
  public:
@@ -351,6 +356,7 @@ class SoftmaxOp<DeviceType::CPU, uint8_t> : public Operation {
     return MaceStatus::MACE_SUCCESS;
   }
 };
+#endif  // MACE_ENABLE_QUANTIZE
 
 #ifdef MACE_ENABLE_OPENCL
 template <typename T>
@@ -382,8 +388,10 @@ void RegisterSoftmax(OpRegistryBase *op_registry) {
   MACE_REGISTER_OP(op_registry, "Softmax", SoftmaxOp,
                    DeviceType::CPU, float);
 
+#ifdef MACE_ENABLE_QUANTIZE
   MACE_REGISTER_OP(op_registry, "Softmax", SoftmaxOp,
                    DeviceType::CPU, uint8_t);
+#endif  // MACE_ENABLE_QUANTIZE
 
 #ifdef MACE_ENABLE_OPENCL
   MACE_REGISTER_OP(op_registry, "Softmax", SoftmaxOp,
diff --git a/mace/ops/space_to_batch.cc b/mace/ops/space_to_batch.cc
index f391bc79bc4b005a8e6757c4a457159df9baf09a..a023ae897b98fca66c7502b82f40bef8fcc94959 100644
--- a/mace/ops/space_to_batch.cc
+++ b/mace/ops/space_to_batch.cc
@@ -197,6 +197,7 @@ class SpaceToBatchNDOp<DeviceType::CPU, float> : public SpaceToBatchOpBase {
   }
 };
 
+#ifdef MACE_ENABLE_QUANTIZE
 template <>
 class SpaceToBatchNDOp<DeviceType::CPU, uint8_t> : public SpaceToBatchOpBase {
  public:
@@ -299,6 +300,7 @@ class SpaceToBatchNDOp<DeviceType::CPU, uint8_t> : public SpaceToBatchOpBase {
     return MaceStatus::MACE_SUCCESS;
   }
 };
+#endif  // MACE_ENABLE_QUANTIZE
 
 #ifdef MACE_ENABLE_OPENCL
 template <typename T>
@@ -331,8 +333,10 @@ void RegisterSpaceToBatchND(OpRegistryBase *op_registry) {
   MACE_REGISTER_OP(op_registry, "SpaceToBatchND",
                    SpaceToBatchNDOp, DeviceType::CPU, float);
 
+#ifdef MACE_ENABLE_QUANTIZE
   MACE_REGISTER_OP(op_registry, "SpaceToBatchND",
                    SpaceToBatchNDOp, DeviceType::CPU, uint8_t);
+#endif  // MACE_ENABLE_QUANTIZE
 
 #ifdef MACE_ENABLE_OPENCL
   MACE_REGISTER_OP(op_registry, "SpaceToBatchND",
diff --git a/mace/ops/squeeze.cc b/mace/ops/squeeze.cc
index 37ee3d70eae1d21ecb3335d292eb5913a660d909..0cd15752f52adc7383239591c96c077e4354ac04 100644
--- a/mace/ops/squeeze.cc
+++ b/mace/ops/squeeze.cc
@@ -52,7 +52,9 @@ class SqueezeOp : public Operation {
 
 void RegisterSqueeze(OpRegistryBase *op_registry) {
   MACE_REGISTER_OP(op_registry, "Squeeze", SqueezeOp, DeviceType::CPU, float);
+#ifdef MACE_ENABLE_QUANTIZE
   MACE_REGISTER_OP(op_registry, "Squeeze", SqueezeOp, DeviceType::CPU, uint8_t);
+#endif  // MACE_ENABLE_QUANTIZE
 #ifdef MACE_ENABLE_OPENCL
   MACE_REGISTER_OP(op_registry, "Squeeze", SqueezeOp, DeviceType::GPU, float);
   MACE_REGISTER_OP(op_registry, "Squeeze", SqueezeOp, DeviceType::GPU, half);
diff --git a/mace/public/mace.h b/mace/public/mace.h
index e9ab737ae5e3fa0582a12fb998f1000077121995..ef8fb35d5d781a401b0be58c8a59f03c48a3bd16 100644
--- a/mace/public/mace.h
+++ b/mace/public/mace.h
@@ -223,7 +223,7 @@ class MACE_API MaceEngineConfig {
   /// \param status MACE_SUCCESS for successful, or it can't reliabley
   /// detect big-LITTLE cores (see GetBigLittleCoreIDs). In such cases, it's
   /// suggested to use AFFINITY_NONE to use all cores.
-  /// \param use_gemmlowp use gemmlowp for quantized inference
+  /// \param use_gemmlowp use gemmlowp for cpu quantized inference
   /// \return MaceStatus::MACE_SUCCESS for success, other for failed.
   MaceStatus SetCPUThreadPolicy(int num_threads_hint,
                                 CPUAffinityPolicy policy,
diff --git a/tools/build-standalone-lib.sh b/tools/build-standalone-lib.sh
index a08fb3b06c8b1ce3cf66b0f759051145edc82d97..348665964479900f1b02a1424364d7133d14cda4 100755
--- a/tools/build-standalone-lib.sh
+++ b/tools/build-standalone-lib.sh
@@ -24,41 +24,41 @@ mkdir -p $LIB_DIR/linux-x86-64
 
 # build shared libraries
 echo "build shared lib for armeabi-v7a + cpu_gpu_dsp"
-bazel build --config android --config optimization mace/libmace:libmace_dynamic --define neon=true --define openmp=true --define opencl=true --define hexagon=true --cpu=armeabi-v7a
+bazel build --config android --config optimization mace/libmace:libmace_dynamic --define neon=true --define openmp=true --define opencl=true --define hexagon=true --define quantize=true --cpu=armeabi-v7a
 cp bazel-bin/mace/libmace/libmace.so $LIB_DIR/armeabi-v7a/cpu_gpu_dsp/
 cp third_party/nnlib/*so $LIB_DIR/armeabi-v7a/cpu_gpu_dsp/
 
 echo "build shared lib for armeabi-v7a + cpu_gpu"
-bazel build --config android --config optimization mace/libmace:libmace_dynamic --define neon=true --define openmp=true --define opencl=true --cpu=armeabi-v7a
+bazel build --config android --config optimization mace/libmace:libmace_dynamic --define neon=true --define openmp=true --define opencl=true --define quantize=true --cpu=armeabi-v7a
 cp bazel-bin/mace/libmace/libmace.so $LIB_DIR/armeabi-v7a/cpu_gpu/
 
 echo "build shared lib for arm64-v8a + cpu_gpu"
-bazel build --config android --config optimization mace/libmace:libmace_dynamic --define neon=true --define openmp=true --define opencl=true --cpu=arm64-v8a
+bazel build --config android --config optimization mace/libmace:libmace_dynamic --define neon=true --define openmp=true --define opencl=true --define quantize=true --cpu=arm64-v8a
 cp bazel-bin/mace/libmace/libmace.so $LIB_DIR/arm64-v8a/cpu_gpu/
 
 if [[ "$OSTYPE" != "darwin"* ]];then
 	echo "build shared lib for linux-x86-64"
-	bazel build mace/libmace:libmace_dynamic --config optimization --define openmp=true
+	bazel build mace/libmace:libmace_dynamic --config optimization --define quantize=true --define openmp=true
 	cp bazel-bin/mace/libmace/libmace.so $LIB_DIR/linux-x86-64/
 fi
 
 # build static libraries
 echo "build static lib for armeabi-v7a + cpu_gpu_dsp"
-bazel build --config android --config optimization mace/libmace:libmace_static --config symbol_hidden --define neon=true --define openmp=true --define opencl=true --define hexagon=true --cpu=armeabi-v7a
+bazel build --config android --config optimization mace/libmace:libmace_static --config symbol_hidden --define neon=true --define openmp=true --define opencl=true --define hexagon=true --define quantize=true --cpu=armeabi-v7a
 cp bazel-genfiles/mace/libmace/libmace.a $LIB_DIR/armeabi-v7a/cpu_gpu_dsp/
 cp third_party/nnlib/*so $LIB_DIR/armeabi-v7a/cpu_gpu_dsp/
 
 echo "build static lib for armeabi-v7a + cpu_gpu"
-bazel build --config android --config optimization mace/libmace:libmace_static --config symbol_hidden --define neon=true --define openmp=true --define opencl=true --cpu=armeabi-v7a
+bazel build --config android --config optimization mace/libmace:libmace_static --config symbol_hidden --define neon=true --define openmp=true --define opencl=true --define quantize=true --cpu=armeabi-v7a
 cp bazel-genfiles/mace/libmace/libmace.a $LIB_DIR/armeabi-v7a/cpu_gpu/
 
 echo "build static lib for arm64-v8a + cpu_gpu"
-bazel build --config android --config optimization mace/libmace:libmace_static --config symbol_hidden --define neon=true --define openmp=true --define opencl=true --cpu=arm64-v8a
+bazel build --config android --config optimization mace/libmace:libmace_static --config symbol_hidden --define neon=true --define openmp=true --define opencl=true --define quantize=true --cpu=arm64-v8a
 cp bazel-genfiles/mace/libmace/libmace.a $LIB_DIR/arm64-v8a/cpu_gpu/
 
 if [[ "$OSTYPE" != "darwin"* ]];then
 	echo "build static lib for linux-x86-64"
-	bazel build mace/libmace:libmace_static --config optimization --define openmp=true
+	bazel build mace/libmace:libmace_static --config optimization --define quantize=true --define openmp=true
 	cp bazel-genfiles/mace/libmace/libmace.a $LIB_DIR/linux-x86-64/
 fi
 
diff --git a/tools/converter.py b/tools/converter.py
index 4ad1a8b55d732181758a5fc119355eb1923919cf..3a1aeba3ac31c9615aa3d781591927a0d8b62d5c 100644
--- a/tools/converter.py
+++ b/tools/converter.py
@@ -279,6 +279,17 @@ def get_opencl_mode(configs):
     return False
 
 
+def get_quantize_mode(configs):
+    for model_name in configs[YAMLKeyword.models]:
+        quantize =\
+            configs[YAMLKeyword.models][model_name].get(
+                YAMLKeyword.quantize, 0)
+        if quantize == 1:
+            return True
+
+    return False
+
+
 def md5sum(str):
     md5 = hashlib.md5()
     md5.update(str.encode('utf-8'))
@@ -855,6 +866,7 @@ def build_model_lib(configs, address_sanitizer):
             abi=target_abi,
             hexagon_mode=hexagon_mode,
             enable_opencl=get_opencl_mode(configs),
+            enable_quantize=get_quantize_mode(configs),
             address_sanitizer=address_sanitizer,
             symbol_hidden=True
         )
@@ -968,6 +980,7 @@ def build_mace_run(configs, target_abi, enable_openmp, address_sanitizer,
         hexagon_mode=hexagon_mode,
         enable_openmp=enable_openmp,
         enable_opencl=get_opencl_mode(configs),
+        enable_quantize=get_quantize_mode(configs),
         address_sanitizer=address_sanitizer,
         symbol_hidden=symbol_hidden,
         extra_args=build_arg
@@ -996,6 +1009,7 @@ def build_example(configs, target_abi, enable_openmp, address_sanitizer,
                             abi=target_abi,
                             enable_openmp=enable_openmp,
                             enable_opencl=get_opencl_mode(configs),
+                            enable_quantize=get_quantize_mode(configs),
                             hexagon_mode=hexagon_mode,
                             address_sanitizer=address_sanitizer,
                             symbol_hidden=symbol_hidden)
@@ -1025,6 +1039,7 @@ def build_example(configs, target_abi, enable_openmp, address_sanitizer,
                             abi=target_abi,
                             enable_openmp=enable_openmp,
                             enable_opencl=get_opencl_mode(configs),
+                            enable_quantize=get_quantize_mode(configs),
                             hexagon_mode=hexagon_mode,
                             address_sanitizer=address_sanitizer,
                             extra_args=build_arg)
@@ -1404,6 +1419,7 @@ def build_benchmark_model(configs, target_abi, enable_openmp, mace_lib_type):
                             abi=target_abi,
                             enable_openmp=enable_openmp,
                             enable_opencl=get_opencl_mode(configs),
+                            enable_quantize=get_quantize_mode(configs),
                             hexagon_mode=hexagon_mode,
                             symbol_hidden=symbol_hidden,
                             extra_args=build_arg)
diff --git a/tools/sh_commands.py b/tools/sh_commands.py
index 9c8045f19b3e3a2afae06d4a4555e2d34968caf3..0eb991296d180225b25bc2cc1429f0de17c10e76 100644
--- a/tools/sh_commands.py
+++ b/tools/sh_commands.py
@@ -342,6 +342,7 @@ def bazel_build(target,
                 enable_openmp=True,
                 enable_neon=True,
                 enable_opencl=True,
+                enable_quantize=True,
                 address_sanitizer=False,
                 symbol_hidden=True,
                 extra_args=""):
@@ -351,6 +352,8 @@ def bazel_build(target,
             "build",
             "--define",
             "openmp=%s" % str(enable_openmp).lower(),
+            "--define",
+            "quantize=%s" % str(enable_quantize).lower(),
             target,
         )
     else:
@@ -367,6 +370,8 @@ def bazel_build(target,
             "--define",
             "opencl=%s" % str(enable_opencl).lower(),
             "--define",
+            "quantize=%s" % str(enable_quantize).lower(),
+            "--define",
             "hexagon=%s" % str(hexagon_mode).lower())
     if address_sanitizer:
         bazel_args += ("--config", "asan")