Add avx512 core instructions check (#27732)

* Add avx instructions check

* Small fix

* Change function name

* Change uint to unsigned int

paddle/fluid/platform/cpu_info.cc

@@ -164,6 +164,13 @@ bool MayIUse(const cpu_isa_t cpu_isa) {
         // AVX512F: EBX Bit 16
         int avx512f_mask = (1 << 16);
         return (reg[1] & avx512f_mask) != 0;
+      } else if (cpu_isa == avx512_core) {
+        unsigned int avx512f_mask = (1 << 16);
+        unsigned int avx512dq_mask = (1 << 17);
+        unsigned int avx512bw_mask = (1 << 30);
+        unsigned int avx512vl_mask = (1 << 31);
+        return ((reg[1] & avx512f_mask) && (reg[1] & avx512dq_mask) &&
+                (reg[1] & avx512bw_mask) && (reg[1] & avx512vl_mask));
       }
     }
 #endif

paddle/fluid/pybind/pybind.cc

@@ -142,6 +142,17 @@ bool IsCompiledWithMKLDNN() {
 #endif
 }
 
+bool SupportsBfloat16() {
+#ifndef PADDLE_WITH_MKLDNN
+  return false;
+#else
+  if (platform::MayIUse(platform::cpu_isa_t::avx512_core))
+    return true;
+  else
+    return false;
+#endif
+}
+
 bool IsCompiledWithBrpc() {
 #ifndef PADDLE_WITH_DISTRIBUTE
   return false;
@@ -1661,6 +1672,7 @@ All parameter, weight, gradient are variables in Paddle.
   m.def("is_compiled_with_cuda", IsCompiledWithCUDA);
   m.def("is_compiled_with_xpu", IsCompiledWithXPU);
   m.def("is_compiled_with_mkldnn", IsCompiledWithMKLDNN);
+  m.def("supports_bfloat16", SupportsBfloat16);
   m.def("is_compiled_with_brpc", IsCompiledWithBrpc);
   m.def("is_compiled_with_dist", IsCompiledWithDIST);
   m.def("_cuda_synchronize", [](const platform::CUDAPlace &place) {

python/paddle/fluid/tests/unittests/mkldnn/test_conv2d_bf16_mkldnn_op.py

@@ -19,7 +19,7 @@ import numpy as np
 import struct
 
 import paddle.fluid.core as core
-from paddle.fluid.tests.unittests.op_test import OpTest, skip_check_grad_ci, convert_float_to_uint16
+from paddle.fluid.tests.unittests.op_test import OpTest, convert_float_to_uint16
 from paddle.fluid.tests.unittests.test_conv2d_op import conv2d_forward_naive, TestConv2dOp
 
 
@@ -205,4 +205,5 @@ class TestWithInput1x1Filter1x1(TestConv2dBf16Op):
 
 
 if __name__ == '__main__':
-    unittest.main()
+    if core.supports_bfloat16():
+        unittest.main()