Add support for loongarch64

Author: zhaixiaojuan

rustup-init.sh

@@ -370,6 +370,9 @@ get_architecture() {
         riscv64)
             _cputype=riscv64gc
             ;;
+        loongarch64)
+            _cputype=loongarch64
+            ;;
         *)
             err "unknown CPU type: $_cputype"
 

src/dist/triple.rs

@@ -22,6 +22,7 @@ static LIST_ARCHS: &[&str] = &[
     "powerpc64le",
     "riscv64gc",
     "s390x",
+    "loongarch64",
 ];
 static LIST_OSES: &[&str] = &[
     "pc-windows",

src/test.rs

@@ -99,6 +99,8 @@ pub fn this_host_triple() -> String {
         "riscv64gc"
     } else if cfg!(target_arch = "aarch64") {
         "aarch64"
+    } else if cfg!(target_arch = "loongarch64") {
+        "loongarch64"
     } else {
         unimplemented!()
     };