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Fix missing sigmoid intrinsic in C++ #2231

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Merged
tqchen merged 1 commit into from
Dec 7, 2018
Merged

Fix missing sigmoid intrinsic in C++ #2231

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3 changes: 0 additions & 3 deletions python/tvm/intrin.py
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Original file line number Diff line number Diff line change
Expand Up @@ -492,6 +492,3 @@ def _rule_float_direct(op):
register_intrin_rule("opencl", "exp", _rule_float_direct, override=True)
# default pattern for exp
register_intrin_rule("default", "exp", _rule_float_suffix, override=True)

# default pattern for sigmoid
register_intrin_rule("default", "sigmoid", lambda op: 1.0 / (1.0 + exp(-op.args[0])))
10 changes: 10 additions & 0 deletions src/codegen/intrin_rule.cc
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Expand Up @@ -24,6 +24,16 @@ TVM_REGISTER_GLOBAL("tvm.intrin.rule.default.sqrt")
TVM_REGISTER_GLOBAL("tvm.intrin.rule.default.pow")
.set_body(DispatchExtern<FloatSuffix>);

TVM_REGISTER_GLOBAL("tvm.intrin.rule.default.sigmoid")
.set_body([](const TVMArgs& args, TVMRetValue* rv){
Expr e = args[0];
const Call* call = e.as<Call>();
CHECK(call != nullptr);

auto one = make_const(call->args[0].type(), 1);
*rv = one / (one + exp(-call->args[0]));
});

} // namespace intrin
} // namespace codegen
} // namespace tvm