[clang] [llvm] [X86][AMX] Support AMX-TF32 (PR #115625)

[Phoebe Wang via cfe-commits]

================
@@ -0,0 +1,194 @@
+/*===------------- amxtf32intrin.h - AMX_TF32 intrinsics -*- C++ -*---------===
+ *
+ * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+ * See https://llvm.org/LICENSE.txt for license information.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ *
+ *===------------------------------------------------------------------------===
+ */
+
+#ifndef __IMMINTRIN_H
+#error "Never use <amxtf32intrin.h> directly; include <immintrin.h> instead."
+#endif // __IMMINTRIN_H
+
+#ifndef __AMX_TF32INTRIN_H
+#define __AMX_TF32INTRIN_H
+#ifdef __x86_64__
+
+#define __DEFAULT_FN_ATTRS_TF32                                                \
+  __attribute__((__always_inline__, __nodebug__, __target__("amx-tf32")))
+
+#define __DEFAULT_FN_ATTRS_TF32_TRANSPOSE                                      \
+  __attribute__((__always_inline__, __nodebug__,                               \
+                 __target__("amx-tf32,amx-transpose")))
----------------
phoebewang wrote:

We should split transpose intrinsics to a seperate file with macro
```
#if !defined(__SCE__) || __has_feature(modules) ||
   (defined(__AMX_TF32__) && defined(__AMX_TRANSPOSE__))
#include <amxtf32transposeintrin.h>
#endif
```

https://github.com/llvm/llvm-project/pull/115625