cuda : add F32 sgemm branch

ggml-org · Green-Sky · Oct 31, 2023 · Oct 25, 2023 · Oct 25, 2023 · Oct 25, 2023
commit 16b60dd75c8c89b726da5e9252454791fa1300b7
diff --git a/ggml-cuda.cu b/ggml-cuda.cu
@@ -7252,7 +7252,8 @@ static void ggml_cuda_mul_mat_mat_deq_cublas(const ggml_tensor * src0, const ggm
     ggml_tensor_extra_gpu * dst_extra = (ggml_tensor_extra_gpu *) dst->extra;
     float * dst_ddf = (float *) dst_extra->data_device[g_main_device];
 
-    if (ggml_is_contiguous(src0)) {
+#if 0
+    {
         // convert src0 and src1 to fp16, multiply as fp16, convert dst to fp32
         half * src0_as_f16 = nullptr;
         size_t src0_as = 0;
@@ -7306,9 +7307,40 @@ static void ggml_cuda_mul_mat_mat_deq_cublas(const ggml_tensor * src0, const ggm
         if (src1_as != 0) {
             ggml_cuda_pool_free(src1_as_f16, src1_as);
         }
-    } else {
-        GGML_ASSERT(false && "not implemented");
     }
+#else
+    {
+        // convert src0 to fp32, multiply as fp32
+        float * src0_as_f32 = nullptr;
+        size_t src0_as = 0;
+        if (src0->type != GGML_TYPE_F32) {
+            const to_fp32_cuda_t to_fp32_cuda = ggml_get_to_fp32_cuda(src0->type);
+            GGML_ASSERT(to_fp32_cuda != nullptr);
+            const size_t ne = ne01*ne00;
+            src0_as_f32 = (float *) ggml_cuda_pool_malloc(ne * sizeof(float), &src0_as);
+            to_fp32_cuda(src0_ddq, src0_as_f32, ne, main_stream);
+        }
+
+        const float * src0_ptr = src0->type == GGML_TYPE_F32 ? (const float *) src0_ddq : src0_as_f32;
+
+        const float * src1_ptr = (const float *) src1_ddf;
+
+        const float alpha = 1.0f;
+        const float beta  = 0.0f;
+
+        CUBLAS_CHECK(cublasSetStream(g_cublas_handles[id], main_stream));
+        CUBLAS_CHECK(
+            cublasSgemm(g_cublas_handles[id], CUBLAS_OP_T, CUBLAS_OP_N,
+                    ne01, ne11, ne10,
+                    &alpha, src0_ptr, ne00,
+                            src1_ptr, ne10,
+                    &beta,  dst_ddf,  ne01));
+
+        if (src0_as != 0) {
+            ggml_cuda_pool_free(src0_as_f32, src0_as);
+        }
+    }
+#endif
 }
 
 static void ggml_cuda_mul_mat(const ggml_tensor * src0, const ggml_tensor * src1, ggml_tensor * dst) {