* Optimize weight quantizaion, test=develop

* [LITE][OPENCL] fix OpenCL global static resources. test=develop

* Fix Cxx and light api. test=develop

[MLU] add some basic support for MLU, including related passes, kernels, gtests and some api in padddle_api.h
Passes：mlu_subgraph_pass ,mlu_postprocess_pass
Kernels:  act，batch_norm, concat, conv, elementwise, fc, interpolate, pool, scale, softmax

* [LITE][XPU] bind xpu resnet50 kernels

* [LITE][XPU] fuse resnet50 and encoder

* [LITE][XPU] bind xpu bert kernels

* [LITE][XPU] refine xpu_resnet_fuse_pass.cc

* [LITE][XPU] add xpu stack kernel

* [LITE][XPU] add xpu slice/tanh kernel

* [LITE][XPU] refine resnet50 and encoder fusor

* [LITE][XPU] split resnet50 and multi_encoder op from subgraph_op.h

* [LITE][XPU] clean workspace

* [LITE][XPU] add build script

* [LITE][XPU] fix compilation errors

* [LITE][XPU] fix kernel matmul

* [LITE][XPU] fix kernel ewadd ewsub

* [LITE][XPU] add xpu cast kernel

* [LITE][XPU] fix kernel slice

* [LITE][XPU] switch dev by LITE_XPU_DEV env

* [LITE][XPU] eliminate useless cast op

* [LITE][XPU] add PerThread Ops

* [LITE][X86] add SequenceUnpad op and kernel

* [LITE][XPU] add LITE_WITH_XTCL option

* [LITE][X86] add SequenceConv kernel

* [LITE][XPU] fix cmake dependency

* [LITE][XPU] add xpu sigmoid kernel

* [XPU] Remove the dependencies of framework.pb.h
test=develop

Change-Id: Icfb44efb0482a6369b365b5c09017765328fc10d

* [XPU] Fix the precision of cast kernel
test=develop

Change-Id: Icb18be47d7ab490de9fb9c92eae1165f49dbf492

* [Core] Fix the compiling error when build for the target that disable XPU
test=develop

Change-Id: I38ec53f222391d3bf06b70512e6c3ad1282e4683

* [XPU] Add io_copy kernel for xpu<->arm
test=develop

Change-Id: Iec7ea066f040534285557f9948b73e6a1970aed7

* fix
test=develop

Change-Id: I4db1c93df48e22afbba904ce6c3b0babd9fda4c3

* fix target matching of type_target_cast_pass and remove the unnecessary registration of io_copy kernel
test=develop

Change-Id: I432c10c9d1064e778d43fd0d12d8cf0599252f7a

* [X86] Add the keyword 'template' to avoid the compiling errors
test=develop

Change-Id: I015d5d323adafb3884029c8287ced66c90ad931e

* Fix the build.sh for XPU and x86
test=develop

Change-Id: I7d9575243669ce02af69a8ddbd6421db31902bd6

* [XPU] Add the keyword 'template' to avoid the compiling errors
test=develop

Change-Id: I46d0b3b6861286a73ee2999934b8e185e453e749

* [XPU] Add XTCL compiling option in build.sh
test=develop

Change-Id: I8b3fd998ca5f898d5bd2e665646e3874b3b73c80

* fix namespace conflicts, test=develop

* [API][XPU] Move the XPU related APIs into CxxConfig
test=develop

Change-Id: I75ac35e8bae96bcb835683f413f01b9db45afbf9

* [API][XPU] Remove the LITE_WITH_XPU in paddle_api.h
test=develop

Change-Id: Idbd64013bdf331ad876919511c1c349332d46f93

* [API][XPU] Remove XPUSetWorkspaceL3SizePerThread and XPUSetDevPerThread
test=develop

Change-Id: I515958f56f8e129280bae61c923513cc91fb9728

* [API][Core][XPU] Refine the test case and remove the necessary modifications
test=develop

Change-Id: I1e0e2957a2f9d5f4207b06c0bc98a5ab611fee56

* [Core] Remove useless code
test=develop

Change-Id: I6293faa10424aea2836d09d85ddb6a30f7811678

* [XPU] Refine the test cases
test=develop

Change-Id: I6818fc3addf1bca5b96a7d66ee99263242e3374f

* [XPU] Remove useless scripts and code
test=develop

Change-Id: I965ba6712d3cf881d0038f0473fec27d4c1bc684

* [XPU] Use InferShapeImpl in sequence_unpad, resnet50 and multi_encoder op
test=develop

Change-Id: I5375f524d36836a394d426b4b2bc9fb44be0b59c

* test=develop

Change-Id: I42ee68c8a5e891dd0f3e95d6cfbc498be7cf1519

* test=develop

Change-Id: If679e5aa73e1368e0ee5bd5f286d2e1b4c2f354e

* [XPU] Add __xpu__ prefix to the op and graph pass name of resnet50 and multi_encoder
test=develop

Change-Id: Idb61c99b4b8429cb87665bfd6835ab4d7d263be2

* [XPU] Fix and refine the xpu fuse pass
test=develop

Change-Id: If1c5b6788d994e2809c1a00d9384685a89440907

* test=develop

Change-Id: Icfa333e322fc4351700103692c46cfcb3d4f9a89

* [XPU] Remove the dependency on xpu api for xpu fuse passes
test=develop

Change-Id: I6094b5536f58ae18bab068284b32f9bd10a2ab92

* [XPU] Move unit tests from lite/api to lite/tests/api
test=develop

Change-Id: I7ba27abb23abeffb0c95fdbbefec7ac16cdbd250

* test=develop

Change-Id: I33230c84d6c4e61bf19f46668bae2baa3ef68794

* [XPU] Refine code
test=develop

Change-Id: I37bc5b948b4927e44cd3ea2594ebe3fd7671be06

* [XPU] Add env XPU_ENABLE_XTCL to enable xpu_subgraph_pass
test=develop

Change-Id: Ifb8e07e86f307f562adaca3ce792015a6f2a2204

* [XPU] refine code
test=develop

Change-Id: I1380654b930d51ae704dbc0cd855464d9c3b5b79

* [XPU] Refine code
test=develop

Change-Id: I73285c2718ccd3612490eb2635bef4fd608c9bde

* [XPU] Add comments for the XPU APIs
test=develop

Change-Id: Ieb5015f37984f8869b90c4c625c5894bb26164fd
Co-authored-by: Nmiaotianxiang <miaotianxiang@baidu.com>
Co-authored-by: NShixiaowei02 <39303645+Shixiaowei02@users.noreply.github.com>

* add conv_transpose+bn fusion. test=develop

* delete note, test=develop

* fix format space, test=develop

* fix opt run error, test=develop

* Fix OpenCL kernel of exp, tanh,

* Fix layout pass for opencl backend,

* Add how to debug cl kernel. test=develop.

This reverts commit 670fcc3c.

* [MLU] support resnet50 on MLU

* [MLU] support resnet50 on MLU

* Fix memory_resuse for opencl. test=develop

* remove useless code. test=develop

* [LITE][OPENCL] Support video-sr feature using OpenCL FP16 Image. test=develop

* optimize image2d_to_buffer_with_post255. test=develop

* add def debug in cl kernel. test=develop

* remove conv image code in conv buffer. test=develop

[LITE][OPENCL] support fp16 for cl_image_converter, layout, activation all OpenCL image kernel. test=develop (#2964)

* [LITE][OPENCL] support fp16 for cl_image_converter, layout, activation image kernel. test=develop

* add conv, depthwise and UT. test=develop

* add pool, conv, nearest_interp kernel. test=develop

* support fp16 for scale, reshape, concat, fc buffer opencl kernel. test=develop

* refactor for mul opencl buffer kernel. test=develop

* support fp16 for elementwise_mul opecl image kernel. test=develop

* support fp16 for elementwise_mul opencl image kernel. test=develop

* support fp16 for ele_add, fuse_ele_add_act opencl kernel. test=develop

* rename io_copy. test=develop

* mobilenetv1,v2 passed on 855. test=develop

* fix opt for opencl. test=develop

skip fusing quantized conv2d + relu6 for now

fix fpga lite_tensor compile bug
     add fake quantize_abs_max op
     test=develop

* fix con+relu6/leakyRelu fusion in Fp32, test=develop

* note m=397 in sgemv_int8 ut, test=develop

* fix ios build error. test=develop

* optimize quant_dequant_fuse_pass, test=develop

* update, test=develop

* update, test=develop

* fix bug for accessing the removed node, test=develop

* set the bias of int8 conv as float, test=develop

* support weight quantization, test=develop

* up, test=develop

* up, test=develop

* up, test=develop

1. add conv_5x5s2_dw to support any padding
2. add 1x1s2pooling impl
3. fix conv dw 3x3 s1p01 bug

* Support bitman backend

* temporarily remove x86 fuse test=develop

* remove useless logs test=develop