tqchen commented on a change in pull request #5601:
URL: https://github.com/apache/incubator-tvm/pull/5601#discussion_r428730836
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File path: src/target/llvm/codegen_llvm.cc
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@@ -555,12 +558,48 @@ void CodeGenLLVM::CreateSerialFor(llvm::Value* begin,
llvm::Value* end, llvm::Va
builder_->SetInsertPoint(for_end);
}
+static llvm::Value* GetInt32VectorOrScalar(
+ llvm::IRBuilder<llvm::ConstantFolder, llvm::IRBuilderDefaultInserter>*
builder, uint32_t v,
+ int lanes) {
+ if (lanes == 1) {
+ return builder->getInt32(v);
+ } else {
+ std::vector<llvm::Constant*> consts;
+ for (int i = 0; i < lanes; i++) {
+ consts.emplace_back(builder->getInt32(v));
+ }
+ return llvm::ConstantVector::get(consts);
+ }
+}
+
// cast operatpr
llvm::Value* CodeGenLLVM::CreateCast(DataType from, DataType to, llvm::Value*
value) {
llvm::Type* target = DTypeToLLVMType(to);
if (value->getType() == target) return value;
if (to.is_handle()) {
return builder_->CreateBitCast(value, target);
+ } else if (to.is_float() && from.is_bfloat()) {
+ CHECK_EQ(from.bits(), 16);
Review comment:
Then we should legalize the cast as well in the TIR to introduce the
actual impl of the cast funtions in TIR, please also refer to
https://tvm.apache.org/2020/05/20/bring-your-own-datatypes for releated
implemenetation
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