Update default stride (#1576)

* Update default stride value to -1

* Fix format

* Revert "Fix format"

This reverts commit ae0c3649

.

---------
Co-authored-by: Harisankar Sadasivan <135730918+hsadasiv@users.noreply.github.com>

example/01_gemm/common.hpp

@@ -29,9 +29,9 @@ struct ProblemSize final
     ck::index_t N = 4096;
     ck::index_t K = 4096;
 
-    ck::index_t StrideA = 0;
-    ck::index_t StrideB = 0;
-    ck::index_t StrideC = 0;
+    ck::index_t StrideA = -1;
+    ck::index_t StrideB = -1;
+    ck::index_t StrideC = -1;
 };
 
 struct ProblemSizeStreamK final
@@ -40,9 +40,9 @@ struct ProblemSizeStreamK final
     ck::index_t N = 4096;
     ck::index_t K = 4096;
 
-    ck::index_t StrideA = 0;
-    ck::index_t StrideB = 0;
-    ck::index_t StrideC = 0;
+    ck::index_t StrideA = -1;
+    ck::index_t StrideB = -1;
+    ck::index_t StrideC = -1;
 
     ck::index_t NumSKBlocks = -1;
 };
@@ -52,9 +52,9 @@ struct ProblemSizeStreamK_universal final
     ck::index_t N = 4096;
     ck::index_t K = 4096;
 
-    ck::index_t StrideA = 0;
-    ck::index_t StrideB = 0;
-    ck::index_t StrideC = 0;
+    ck::index_t StrideA = -1;
+    ck::index_t StrideB = -1;
+    ck::index_t StrideC = -1;
 
     ck::index_t Grid_size   = -1; // defaults to max occupancy
     ck::index_t Streamk_sel = 1;  // defaults to 1-tile SK
@@ -66,9 +66,9 @@ struct ProblemSizeSplitK final
     ck::index_t N = 4096;
     ck::index_t K = 4096;
 
-    ck::index_t StrideA = 0;
-    ck::index_t StrideB = 0;
-    ck::index_t StrideC = 0;
+    ck::index_t StrideA = -1;
+    ck::index_t StrideB = -1;
+    ck::index_t StrideC = -1;
 
     ck::index_t KBatch = 1;
 };

example/01_gemm/run_gemm_example.inc

@@ -116,21 +116,21 @@ bool run_gemm(const ProblemType& problem_size, const ExecutionConfig& config)
         };
 
     auto f_get_default_stride =
-        [](std::size_t row, std::size_t col, std::size_t stride, auto layout) {
-            if(stride == 0)
+        [](std::size_t row, std::size_t col, ck::index_t stride, auto layout) {
+            if(stride == -1)
             {
-                // give a chance if stride is zero, return a default packed stride
+                // give a chance if stride is -1, return a default packed stride
                 if constexpr(std::is_same_v<decltype(layout), ck::tensor_layout::gemm::RowMajor>)
                 {
-                    return col;
+                    return static_cast<std::size_t>(col);
                 }
                 else
                 {
-                    return row;
+                    return static_cast<std::size_t>(row);
                 }
             }
             else
-                return stride;
+                return static_cast<std::size_t>(stride);
         };
 
     StrideA = f_get_default_stride(M, K, StrideA, ALayout{});

example/01_gemm/run_gemm_example_streamk_v2.inc

@@ -117,9 +117,9 @@ bool run_gemm(const ProblemType& problem_size, const ExecutionConfig& config)
 
     auto f_get_default_stride =
         [](std::size_t row, std::size_t col, ck::index_t stride, auto layout) {
-            if(stride == 0)
+            if(stride == -1)
             {
-                // give a chance if stride is 0, return a default packed stride
+                // give a chance if stride is -1, return a default packed stride
                 if constexpr(std::is_same_v<decltype(layout), ck::tensor_layout::gemm::RowMajor>)
                 {
                     return static_cast<std::size_t>(col);

example/01_gemm/run_gemm_example_v2.inc

@@ -115,21 +115,21 @@ bool run_gemm(const ProblemType& problem_size, const ExecutionConfig& config)
         };
 
     auto f_get_default_stride =
-        [](std::size_t row, std::size_t col, std::size_t stride, auto layout) {
-            if(stride == 0)
+        [](std::size_t row, std::size_t col, ck::index_t stride, auto layout) {
+            if(stride == -1)
             {
-                // give a chance if stride is zero, return a default packed stride
+                // give a chance if stride is -1, return a default packed stride
                 if constexpr(std::is_same_v<decltype(layout), ck::tensor_layout::gemm::RowMajor>)
                 {
-                    return col;
+                    return static_cast<std::size_t>(col);
                 }
                 else
                 {
-                    return row;
+                    return static_cast<std::size_t>(row);
                 }
             }
             else
-                return stride;
+                return static_cast<std::size_t>(stride);
         };
 
     StrideA = f_get_default_stride(M, K, StrideA, ALayout{});