Allow different output type than input type when dispatching

dpnp/backend/extensions/vm/abs.hpp

@@ -48,7 +48,8 @@ sycl::event abs_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::AbsOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::abs(exec_q,
                        n, // number of elements to be calculated

dpnp/backend/extensions/vm/acos.hpp

@@ -48,7 +48,8 @@ sycl::event acos_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::AcosOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::acos(exec_q,
                         n, // number of elements to be calculated

dpnp/backend/extensions/vm/acosh.hpp

@@ -48,7 +48,8 @@ sycl::event acosh_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::AcoshOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::acosh(exec_q,
                          n, // number of elements to be calculated

dpnp/backend/extensions/vm/add.hpp

@@ -50,7 +50,8 @@ sycl::event add_contig_impl(sycl::queue exec_q,
 
     const T *a = reinterpret_cast<const T *>(in_a);
     const T *b = reinterpret_cast<const T *>(in_b);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::AddOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::add(exec_q,
                        n, // number of elements to be calculated

dpnp/backend/extensions/vm/asin.hpp

@@ -48,7 +48,8 @@ sycl::event asin_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::AsinOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::asin(exec_q,
                         n, // number of elements to be calculated

dpnp/backend/extensions/vm/asinh.hpp

@@ -48,7 +48,8 @@ sycl::event asinh_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::AsinhOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::asinh(exec_q,
                          n, // number of elements to be calculated

dpnp/backend/extensions/vm/atan.hpp

@@ -48,7 +48,8 @@ sycl::event atan_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::AtanOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::atan(exec_q,
                         n, // number of elements to be calculated

dpnp/backend/extensions/vm/atan2.hpp

@@ -50,7 +50,8 @@ sycl::event atan2_contig_impl(sycl::queue exec_q,
 
     const T *a = reinterpret_cast<const T *>(in_a);
     const T *b = reinterpret_cast<const T *>(in_b);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::Atan2OutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::atan2(exec_q,
                          n, // number of elements to be calculated

dpnp/backend/extensions/vm/atanh.hpp

@@ -48,7 +48,8 @@ sycl::event atanh_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::AtanhOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::atanh(exec_q,
                          n, // number of elements to be calculated

dpnp/backend/extensions/vm/ceil.hpp

@@ -48,7 +48,8 @@ sycl::event ceil_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::CeilOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::ceil(exec_q,
                         n, // number of elements to be calculated

dpnp/backend/extensions/vm/common.hpp

@@ -82,15 +82,8 @@ std::pair<sycl::event, sycl::event>
 {
     // check type_nums
     int src_typenum = src.get_typenum();
-    int dst_typenum = dst.get_typenum();
-
     auto array_types = dpctl_td_ns::usm_ndarray_types();
     int src_typeid = array_types.typenum_to_lookup_id(src_typenum);
-    int dst_typeid = array_types.typenum_to_lookup_id(dst_typenum);
-
-    if (src_typeid != dst_typeid) {
-        throw py::value_error("Input and output arrays have different types.");
-    }
 
     // check that queues are compatible
     if (!dpctl::utils::queues_are_compatible(exec_q, {src, dst})) {
@@ -155,7 +148,7 @@ std::pair<sycl::event, sycl::event>
         throw py::value_error("Input and outpur arrays must be C-contiguous.");
     }
 
-    auto dispatch_fn = dispatch_vector[dst_typeid];
+    auto dispatch_fn = dispatch_vector[src_typeid];
     if (dispatch_fn == nullptr) {
         throw py::value_error("No implementation is defined for ufunc.");
     }
@@ -179,16 +172,13 @@ std::pair<sycl::event, sycl::event> binary_ufunc(
     // check type_nums
     int src1_typenum = src1.get_typenum();
     int src2_typenum = src2.get_typenum();
-    int dst_typenum = dst.get_typenum();
 
     auto array_types = dpctl_td_ns::usm_ndarray_types();
     int src1_typeid = array_types.typenum_to_lookup_id(src1_typenum);
     int src2_typeid = array_types.typenum_to_lookup_id(src2_typenum);
-    int dst_typeid = array_types.typenum_to_lookup_id(dst_typenum);
 
-    if (src1_typeid != src2_typeid || src2_typeid != dst_typeid) {
-        throw py::value_error(
-            "Either any of input arrays or output array have different types.");
+    if (src1_typeid != src2_typeid) {
+        throw py::value_error("Input arrays have different types.");
     }
 
     // check that queues are compatible
@@ -259,7 +249,7 @@ std::pair<sycl::event, sycl::event> binary_ufunc(
         throw py::value_error("Input and outpur arrays must be C-contiguous.");
     }
 
-    auto dispatch_fn = dispatch_vector[dst_typeid];
+    auto dispatch_fn = dispatch_vector[src1_typeid];
     if (dispatch_fn == nullptr) {
         throw py::value_error("No implementation is defined for ufunc.");
     }
@@ -279,16 +269,8 @@ bool need_to_call_unary_ufunc(sycl::queue exec_q,
 {
     // check type_nums
     int src_typenum = src.get_typenum();
-    int dst_typenum = dst.get_typenum();
-
     auto array_types = dpctl_td_ns::usm_ndarray_types();
     int src_typeid = array_types.typenum_to_lookup_id(src_typenum);
-    int dst_typeid = array_types.typenum_to_lookup_id(dst_typenum);
-
-    // types must be the same
-    if (src_typeid != dst_typeid) {
-        return false;
-    }
 
     // OneMKL VM functions perform a copy on host if no double type support
     if (!exec_q.get_device().has(sycl::aspect::fp64)) {
@@ -356,7 +338,7 @@ bool need_to_call_unary_ufunc(sycl::queue exec_q,
     }
 
     // MKL function is not defined for the type
-    if (dispatch_vector[dst_typeid] == nullptr) {
+    if (dispatch_vector[src_typeid] == nullptr) {
         return false;
     }
     return true;
@@ -372,15 +354,13 @@ bool need_to_call_binary_ufunc(sycl::queue exec_q,
     // check type_nums
     int src1_typenum = src1.get_typenum();
     int src2_typenum = src2.get_typenum();
-    int dst_typenum = dst.get_typenum();
 
     auto array_types = dpctl_td_ns::usm_ndarray_types();
     int src1_typeid = array_types.typenum_to_lookup_id(src1_typenum);
     int src2_typeid = array_types.typenum_to_lookup_id(src2_typenum);
-    int dst_typeid = array_types.typenum_to_lookup_id(dst_typenum);
 
     // types must be the same
-    if (src1_typeid != src2_typeid || src2_typeid != dst_typeid) {
+    if (src1_typeid != src2_typeid) {
         return false;
     }
 
@@ -454,7 +434,7 @@ bool need_to_call_binary_ufunc(sycl::queue exec_q,
     }
 
     // MKL function is not defined for the type
-    if (dispatch_vector[dst_typeid] == nullptr) {
+    if (dispatch_vector[src1_typeid] == nullptr) {
         return false;
     }
     return true;

dpnp/backend/extensions/vm/conj.hpp

@@ -48,7 +48,8 @@ sycl::event conj_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::ConjOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::conj(exec_q,
                         n, // number of elements to be calculated

dpnp/backend/extensions/vm/cos.hpp

@@ -48,7 +48,8 @@ sycl::event cos_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::CosOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::cos(exec_q,
                        n, // number of elements to be calculated

dpnp/backend/extensions/vm/cosh.hpp

@@ -48,7 +48,8 @@ sycl::event cosh_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::CoshOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::cosh(exec_q,
                         n, // number of elements to be calculated

dpnp/backend/extensions/vm/div.hpp

@@ -50,7 +50,8 @@ sycl::event div_contig_impl(sycl::queue exec_q,
 
     const T *a = reinterpret_cast<const T *>(in_a);
     const T *b = reinterpret_cast<const T *>(in_b);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::DivOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::div(exec_q,
                        n, // number of elements to be calculated

dpnp/backend/extensions/vm/exp.hpp

@@ -48,7 +48,8 @@ sycl::event exp_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::ExpOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::exp(exec_q,
                        n, // number of elements to be calculated

dpnp/backend/extensions/vm/expm1.hpp

@@ -48,7 +48,8 @@ sycl::event expm1_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::Expm1OutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::expm1(exec_q,
                          n, // number of elements to be calculated

dpnp/backend/extensions/vm/floor.hpp

@@ -48,7 +48,8 @@ sycl::event floor_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::FloorOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::floor(exec_q,
                          n, // number of elements to be calculated

dpnp/backend/extensions/vm/hypot.hpp

@@ -50,7 +50,8 @@ sycl::event hypot_contig_impl(sycl::queue exec_q,
 
     const T *a = reinterpret_cast<const T *>(in_a);
     const T *b = reinterpret_cast<const T *>(in_b);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::HypotOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::hypot(exec_q,
                          n, // number of elements to be calculated

dpnp/backend/extensions/vm/ln.hpp

@@ -48,7 +48,8 @@ sycl::event ln_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::LnOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::ln(exec_q,
                       n, // number of elements to be calculated

dpnp/backend/extensions/vm/log10.hpp

@@ -48,7 +48,8 @@ sycl::event log10_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::Log10OutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::log10(exec_q,
                          n, // number of elements to be calculated

dpnp/backend/extensions/vm/log1p.hpp

@@ -48,7 +48,8 @@ sycl::event log1p_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::Log1pOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::log1p(exec_q,
                          n, // number of elements to be calculated

dpnp/backend/extensions/vm/log2.hpp

@@ -48,7 +48,8 @@ sycl::event log2_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::Log2OutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::log2(exec_q,
                         n, // number of elements to be calculated

dpnp/backend/extensions/vm/mul.hpp

@@ -50,7 +50,8 @@ sycl::event mul_contig_impl(sycl::queue exec_q,
 
     const T *a = reinterpret_cast<const T *>(in_a);
     const T *b = reinterpret_cast<const T *>(in_b);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::MulOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::mul(exec_q,
                        n, // number of elements to be calculated

dpnp/backend/extensions/vm/pow.hpp

@@ -50,7 +50,8 @@ sycl::event pow_contig_impl(sycl::queue exec_q,
 
     const T *a = reinterpret_cast<const T *>(in_a);
     const T *b = reinterpret_cast<const T *>(in_b);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::PowOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::pow(exec_q,
                        n, // number of elements to be calculated

dpnp/backend/extensions/vm/round.hpp

@@ -48,7 +48,8 @@ sycl::event round_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::RoundOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::rint(exec_q,
                         n, // number of elements to be calculated

dpnp/backend/extensions/vm/sin.hpp

@@ -48,7 +48,8 @@ sycl::event sin_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::SinOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::sin(exec_q,
                        n, // number of elements to be calculated

dpnp/backend/extensions/vm/sinh.hpp

@@ -48,7 +48,8 @@ sycl::event sinh_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::SinhOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::sinh(exec_q,
                         n, // number of elements to be calculated

dpnp/backend/extensions/vm/sqr.hpp

@@ -48,7 +48,8 @@ sycl::event sqr_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::SqrOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::sqr(exec_q,
                        n, // number of elements to be calculated

dpnp/backend/extensions/vm/sqrt.hpp

@@ -48,7 +48,8 @@ sycl::event sqrt_contig_impl(sycl::queue exec_q,
     type_utils::validate_type_for_device<T>(exec_q);
 
     const T *a = reinterpret_cast<const T *>(in_a);
-    T *y = reinterpret_cast<T *>(out_y);
+    using resTy = typename types::SqrtOutputType<T>::value_type;
+    resTy *y = reinterpret_cast<resTy *>(out_y);
 
     return mkl_vm::sqrt(exec_q,
                         n, // number of elements to be calculated