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[TOPI] Bitserial low-precision convolution #1332

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merged 16 commits into from
Jul 23, 2018
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Bitserial low-precision convolution operators for x86 and raspberry pi
Raspberry pi schedules include optimized microkernel

@cowanmeg cowanmeg changed the title Bitserial low-precision convolution [TOPI] Bitserial low-precision convolution Jun 25, 2018
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tqchen commented Jun 25, 2018

please remove change in the submodule and update to the lastest one

@@ -53,6 +53,22 @@ def schedule_conv2d_nhwc(outs):
"""
return _default_schedule(outs, False)

@tvm.target.generic_func
def schedule_qdense(outs):
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qdense->bitserial_dense?

def _intrin_func(ins, outs):
ww, xx = ins
zz = outs[0]
vpadd_id = tvm.const(647, 'uint32')
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Did we develop an intrinsic id query function by name? since this may differ in llvm version

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tqchen commented Jun 25, 2018

Some actionable items to improve the intrinsic id finding

  • Use Intrinsic::ID Function::lookupIntrinsicID to lookup intrinsic ID by name
  • Register PackedFunction codegen.llvm_lookup_intrinsic_id(name: str) -> id: int
  • Add the implementation in intrin.py
    • call_llvm_intrin, with the intrinsic name as the first argument, which looks up things by name, and then uses call extern


@tvm.target.generic_func
def schedule_bitserial_conv2d_nhwc(outs):
"""Schedule for qconv2d_nhwc
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qconv2d -> bitserial, maybe try to do a search for qconv2d and rename

func(a, w, b)
np.testing.assert_allclose(b.asnumpy(), b_np, rtol=1e-5)

def test_bitserial_conv2d():
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Since there is a specialization path for ARM, let us add a testcase up to codegen(but not actually run the code) and quickly checking we have the intrinsic we need

@@ -53,6 +53,22 @@ def schedule_conv2d_nhwc(outs):
"""
return _default_schedule(outs, False)

@tvm.target.generic_func
def schedule_qdense(outs):
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qdense->bitserial_dense

@@ -143,6 +159,41 @@ def schedule_depthwise_conv2d_nhwc(outs):
"""
return _default_schedule(outs, False)

@tvm.target.generic_func
def schedule_bitserial_conv2d_nchw(outs):
"""Schedule for qconv2d_nchw
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qconv2d->bitserial_conv2d, do a search over qconv2d and replace by bitserial_conv2d

@tqchen tqchen added status: review in progress status: need update need update based on feedbacks labels Jul 17, 2018
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tqchen commented Jul 21, 2018

please followup with the naming change and llvm intrinsic id query function

@tqchen tqchen merged commit 2d36f61 into apache:master Jul 23, 2018
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tqchen commented Jul 23, 2018

Thanks @cowanmeg for improving the PR! this is now merged

@tqchen tqchen removed status: need update need update based on feedbacks status: review in progress labels Jul 23, 2018
tqchen pushed a commit to tqchen/tvm that referenced this pull request Aug 4, 2018
sergei-mironov pushed a commit to sergei-mironov/tvm that referenced this pull request Aug 8, 2018
@cowanmeg cowanmeg deleted the lowprec-ops branch April 5, 2019 18:09
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