data: complete SGEMM upstream from 3 repos (siboehm+wangzyon+edtallison) + xllm fused_qknorm_rope + xattention kernels

SGEMM repos (upstream_ref/sgemm_cuda/, 41 files):
  siboehm/SGEMM_CUDA: kernel 1-12, runner, CMake, cuBLAS benchmark
  wangzyon/NVIDIA_SGEMM_PRACTICE: kernel 1-7 (Chinese comments), utils
  edtallison/sgemm-cuda: kernel 01-09 (learning notes), Makefile

xllm kernels (ex_engine/xllm_kernels/cuda/):
  fused_qknorm_rope.cu + bind — saves 128 kernel launches/fwd
  xattention/ — 6 files from upstream xllm
  headers: corex_compat_utils.h, topk_last_dim.cuh
  ilu/CMakeLists.txt

SO_BUILD_MANIFEST.md — complete .so inventory and call chain analysis

upstream_ref/sgemm_cuda/utils.cuh

@@ -0,0 +1,42 @@
+#pragma once
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <cuda_runtime.h>
+#include <cublas_v2.h>
+
+/*
+=====================================
+CUDA操作
+=====================================
+*/
+void cudaCheck(cudaError_t error, const char *file, int line); //CUDA错误检查
+void CudaDeviceInfo();                                         // 打印CUDA信息
+
+/*
+=====================================
+矩阵操作
+=====================================
+*/
+void randomize_matrix(float *mat, int N);            // 随机初始化矩阵
+void copy_matrix(float *src, float *dest, int N);    // 复制矩阵
+void print_matrix(const float *A, int M, int N);     // 打印矩阵
+bool verify_matrix(float *mat1, float *mat2, int N); // 验证矩阵
+
+/*
+=====================================
+计时操作
+=====================================
+*/
+float get_current_sec();                        // 获取当前时刻
+float cpu_elapsed_time(float &beg, float &end); // 计算时间差
+
+/*
+=====================================
+kernel操作
+=====================================
+*/
+//调用指定核函数计算矩阵乘法
+void test_kernel(int kernel_num, int m, int n, int k, float alpha, float *A, float *B, float beta, float *C, cublasHandle_t handle);