add some DMC AArch64 versions to druntime (dlang/dmd!21374)

WalterBright · web-flow · commit d527426b69e4 · 2025-05-14T21:52:54.000-07:00
diff --git a/runtime/druntime/src/core/internal/vararg/sysv_x64.d b/runtime/druntime/src/core/internal/vararg/sysv_x64.d
@@ -17,6 +17,11 @@ version (X86_64)
     version (Windows) { /* different ABI */ }
     else version = SysV_x64;
 }
+version (AArch64)
+{
+    version (Windows) { /* different ABI */ }
+    else version = SysV_x64;
+}
 
 version (SysV_x64):
 
diff --git a/runtime/druntime/src/core/stdc/config.d b/runtime/druntime/src/core/stdc/config.d
@@ -260,6 +260,23 @@ else version (DigitalMars)
         else version (Darwin)
             alias real c_long_double;
     }
+    else version (AArch64)
+    {
+        version (linux)
+            alias real c_long_double;
+        else version (FreeBSD)
+            alias real c_long_double;
+        else version (OpenBSD)
+            alias real c_long_double;
+        else version (NetBSD)
+            alias real c_long_double;
+        else version (DragonFlyBSD)
+            alias real c_long_double;
+        else version (Solaris)
+            alias real c_long_double;
+        else version (Darwin)
+            alias real c_long_double;
+    }
 }
 
 static assert(is(c_long_double), "c_long_double needs to be declared for this platform/architecture.");
diff --git a/runtime/druntime/src/core/stdc/stdarg.d b/runtime/druntime/src/core/stdc/stdarg.d
@@ -20,6 +20,11 @@ version (X86_64)
     version (Windows) { /* different ABI */ }
     else version = SysV_x64;
 }
+version (AArch64)
+{
+    version (Windows) { /* different ABI */ }
+    else version = SysV_x64;
+}
 
 version (GNU)
 {
@@ -31,12 +36,28 @@ else version (SysV_x64)
 
     version (DigitalMars)
     {
-        align(16) struct __va_argsave_t
-        {
-            size_t[6] regs;   // RDI,RSI,RDX,RCX,R8,R9
-            real[8] fpregs;   // XMM0..XMM7
-            __va_list va;
-        }
+        version (X86_64)
+            align(16) struct __va_argsave_t
+            {
+                size_t[6] regs;   // RDI,RSI,RDX,RCX,R8,R9
+                real[8] fpregs;   // XMM0..XMM7
+                __va_list va;
+            }
+        else version (AArch64)
+            align(16) struct __va_argsave_t
+            {
+                ulong[8] regs;
+                real[8] fpregs;
+                struct __va_list_tag
+                {
+                    void* stack;
+                    void* gr_top;
+                    void* vr_top;
+                    int gr_offs;
+                    int vr_offs;
+                }
+                void* stack_args_save;
+            }
     }
 }
 
