LoongArch: define preprocessing macros "__loongarch_{arch,tune}"

These are exported according to the LoongArch Toolchain Conventions[1]
as a replacement of the obsolete "_LOONGARCH_{ARCH,TUNE}" macros,
which are expanded to strings representing the actual architecture
and microarchitecture of the target.

[1] currently relased at https://github.com/loongson/LoongArch-Documentation
    /blob/main/docs/LoongArch-toolchain-conventions-EN.adoc

gcc/ChangeLog:

	* config/loongarch/loongarch-c.cc: Export macros
	"__loongarch_{arch,tune}" in the preprocessor.

diff --git a/gcc/config/loongarch/loongarch-c.cc b/gcc/config/loongarch/loongarch-c.cc
index f5a966a1d1c7b7a8b93f5536bc7af4fe710220bb..fbc33a10351f9c7ed7f31daccaf8fc8685738a67 100644 (file)
--- a/gcc/config/loongarch/loongarch-c.cc
+++ b/gcc/config/loongarch/loongarch-c.cc
@@ -64,6 +64,9 @@ loongarch_cpu_cpp_builtins (cpp_reader *pfile)
   LARCH_CPP_SET_PROCESSOR ("_LOONGARCH_ARCH", la_target.cpu_arch);
   LARCH_CPP_SET_PROCESSOR ("_LOONGARCH_TUNE", la_target.cpu_tune);
 
+  LARCH_CPP_SET_PROCESSOR ("__loongarch_arch", la_target.cpu_arch);
+  LARCH_CPP_SET_PROCESSOR ("__loongarch_tune", la_target.cpu_tune);
+
   /* Base architecture / ABI.  */
   if (TARGET_64BIT)
     {