issue/434 nccl support bf16

src/infiniccl/cuda/infiniccl_cuda.cu

@@ -22,6 +22,8 @@ inline ncclDataType_t getNcclDtype(infiniDtype_t datatype) {
         return ncclFloat;
     case INFINI_DTYPE_F16:
         return ncclHalf;
+    case INFINI_DTYPE_BF16:
+        return ncclBfloat16;
     default:
         std::abort();
         return ncclHalf;
@@ -82,9 +84,7 @@ infiniStatus_t allReduce(
     infinicclComm_t comm,
     infinirtStream_t stream) {
 
-    if (datatype != INFINI_DTYPE_F32 && datatype != INFINI_DTYPE_F16) {
-        return INFINI_STATUS_BAD_PARAM;
-    }
+    CHECK_DTYPE(datatype, INFINI_DTYPE_F32, INFINI_DTYPE_F16, INFINI_DTYPE_BF16);
 
     CHECK_NCCL(ncclAllReduce(sendbuf, recvbuf, count, getNcclDtype(datatype),
                              getNcclRedOp(op), getNcclComm(comm), getCudaStream(stream)));