rename sign function in slogdet kernel

Author: co63oc

paddle/phi/kernels/gpu/slogdeterminant_kernel.cu

@@ -389,7 +389,7 @@ struct SlogDeterminantV2Functor {
       VLOG(2) << "det value: " << matrix.determinant();
       VLOG(2) << "matrix val: " << matrix;
       auto det_val = matrix.determinant();
-      sign_vec.push_back(phi::sign(det_val));
+      sign_vec.push_back(slogdet_sign(det_val));
       det_val >= 0
           ? log_vec.push_back(std::log(det_val))
           : log_vec.push_back(std::log(std::abs(
@@ -557,7 +557,7 @@ struct SlogDeterminantV2Functor<phi::dtype::complex<T>, Context> {
       std::complex<T> det_val = matrix.determinant();
       T abs_det_val = std::abs(det_val);
       sign_vec.push_back(static_cast<phi::dtype::complex<T>>(
-          phi::sign(det_val, static_cast<std::complex<T>>(abs_det_val))));
+          slogdet_sign(det_val, static_cast<std::complex<T>>(abs_det_val))));
       log_vec.push_back(std::log(abs_det_val));
     }
     TensorFromVector(sign_vec, dev_ctx, sign);

paddle/phi/kernels/impl/slogdeterminant_kernel_impl.h

@@ -30,13 +30,13 @@ namespace phi {
 
 // T is not complex
 template <typename T>
-T sign(T val) {
+T slogdet_sign(T val) {
   return static_cast<T>(T(0) < val) - (val < T(0));
 }
 
 // T is complex
 template <typename T>
-T sign(T det, T modulus) {
+T slogdet_sign(T det, T modulus) {
   return det / modulus;
 }
 
@@ -209,7 +209,7 @@ struct SlogDeterminantV2Functor {
       VLOG(2) << "det value: " << matrix.determinant();
       VLOG(2) << "matrix val: " << matrix;
       T det_val = matrix.determinant();
-      sign_data[i] = phi::sign(det_val);
+      sign_data[i] = slogdet_sign(det_val);
       det_val >= 0
           ? logdet_data[i] = std::log(det_val)
           : logdet_data[i] = std::log(std::abs(
@@ -270,7 +270,7 @@ struct SlogDeterminantV2Functor<dtype::complex<T>, Context> {
         logdet_data[i] = -std::numeric_limits<T>::infinity();
       } else {
         sign_data[i] = static_cast<Complex_T>(
-            phi::sign(det_val, static_cast<std::complex<T>>(abs_det_val)));
+            slogdet_sign(det_val, static_cast<std::complex<T>>(abs_det_val)));
         logdet_data[i] = std::log(abs_det_val);
       }
     }