fix build on win, fix use condition of crf decoding and layer norm and

enhance test precision

test=develop

paddle/fluid/operators/jit/CMakeLists.txt

@@ -20,4 +20,6 @@ endif()
 
 cc_library(jit_kernel_helper SRCS ${jit_kernel_cc_srcs} DEPS ${JIT_KERNEL_DEPS})
 cc_test(jit_kernel_test SRCS test.cc DEPS jit_kernel_helper)
-cc_binary(jit_kernel_benchmark SRCS benchmark.cc DEPS jit_kernel_helper)
+if(NOT WIN32)
+    cc_binary(jit_kernel_benchmark SRCS benchmark.cc DEPS jit_kernel_helper)
+endif()

paddle/fluid/operators/jit/more/intrinsic/crf_decoding.cc

@@ -22,11 +22,16 @@ namespace operators {
 namespace jit {
 namespace more {
 namespace intrinsic {
+// Note: intrinsic code is not runtime build.
+// For example, if you build code on AVX, and run on AVX512 it can only use AVX
 
 void CRFDecoding(const int seq_len, const float* x, const float* w,
                  float* alpha, int* track, int tag_num) {
-  const int step_size =
-      platform::MayIUse(platform::avx512f) ? ZMM_FLOAT_BLOCK : YMM_FLOAT_BLOCK;
+#ifdef __AVX512F__
+  const int step_size = ZMM_FLOAT_BLOCK;
+#else
+  const int step_size = YMM_FLOAT_BLOCK;
+#endif
   const int end = tag_num / step_size;
   const int rest = tag_num % step_size;
   /* Setup the alpha initial value.*/
@@ -157,7 +162,12 @@ void CRFDecoding(const int seq_len, const float* x, const float* w,
 }
 
 bool CRFDecodingKernel::UseMe(const int& d) const {
-  return platform::MayIUse(platform::avx);
+#ifdef __AVX512F__
+  constexpr int block = ZMM_FLOAT_BLOCK;
+#else
+  constexpr int block = YMM_FLOAT_BLOCK;
+#endif
+  return platform::MayIUse(platform::avx) && d >= block;
 }
 
 }  // namespace intrinsic

paddle/fluid/operators/jit/more/intrinsic/layer_norm.cc

@@ -154,7 +154,7 @@ void LayerNorm(float* x, float* out, float* mean, float* var,
 }
 
 bool LayerNormKernel::UseMe(const int& d) const {
-  return platform::MayIUse(platform::avx);
+  return platform::MayIUse(platform::avx) && d >= YMM_FLOAT_BLOCK;
 }
 
 }  // namespace intrinsic

paddle/fluid/operators/jit/test.cc

@@ -37,7 +37,7 @@ template <typename T>
 void ExpectEQ(const T* target, const T* refer, int n) {
   if (std::is_floating_point<T>::value) {
     for (int i = 0; i < n; ++i) {
-      EXPECT_NEAR(target[i], refer[i], 1e-3);
+      EXPECT_NEAR(target[i], refer[i], 1e-5);
     }
   } else {
     for (int i = 0; i < n; ++i) {