aarch64: Always distinguish LONGDOUBLE

Avoid if-deffery by forcing FFI_TYPE_LONGDOUBLE different
from FFI_TYPE_DOUBLE.  This will simply be unused on hosts
that define them identically.

src/aarch64/ffi.c

@@ -20,11 +20,20 @@ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
 
 #include <stdio.h>
-
+#include <stdlib.h>
 #include <ffi.h>
 #include <ffi_common.h>
 
-#include <stdlib.h>
+/* Force FFI_TYPE_LONGDOUBLE to be different than FFI_TYPE_DOUBLE;
+   all further uses in this file will refer to the 128-bit type.  */
+#if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
+# if FFI_TYPE_LONGDOUBLE != 4
+#  error FFI_TYPE_LONGDOUBLE out of date
+# endif
+#else
+# undef FFI_TYPE_LONGDOUBLE
+# define FFI_TYPE_LONGDOUBLE 4
+#endif
 
 /* Stack alignment requirement in bytes */
 #if defined (__APPLE__)
@@ -115,10 +124,8 @@ get_basic_type_addr (unsigned short type, struct call_context *context,
       return get_s_addr (context, n);
     case FFI_TYPE_DOUBLE:
       return get_d_addr (context, n);
-#if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
     case FFI_TYPE_LONGDOUBLE:
       return get_v_addr (context, n);
-#endif
     case FFI_TYPE_UINT8:
     case FFI_TYPE_SINT8:
     case FFI_TYPE_UINT16:
@@ -151,10 +158,8 @@ get_basic_type_alignment (unsigned short type)
 #endif
     case FFI_TYPE_DOUBLE:
       return sizeof (UINT64);
-#if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
     case FFI_TYPE_LONGDOUBLE:
       return sizeof (long double);
-#endif
     case FFI_TYPE_UINT8:
     case FFI_TYPE_SINT8:
 #if defined (__APPLE__)
@@ -193,10 +198,8 @@ get_basic_type_size (unsigned short type)
       return sizeof (UINT32);
     case FFI_TYPE_DOUBLE:
       return sizeof (UINT64);
-#if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
     case FFI_TYPE_LONGDOUBLE:
       return sizeof (long double);
-#endif
     case FFI_TYPE_UINT8:
       return sizeof (UINT8);
     case FFI_TYPE_SINT8:
@@ -390,9 +393,7 @@ is_register_candidate (ffi_type *ty)
     case FFI_TYPE_VOID:
     case FFI_TYPE_FLOAT:
     case FFI_TYPE_DOUBLE:
-#if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
     case FFI_TYPE_LONGDOUBLE:
-#endif
     case FFI_TYPE_UINT8:
     case FFI_TYPE_UINT16:
     case FFI_TYPE_UINT32:
@@ -557,11 +558,9 @@ copy_basic_type (void *dest, void *source, unsigned short type)
     case FFI_TYPE_DOUBLE:
       *(double *) dest = *(double *) source;
       break;
-#if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
     case FFI_TYPE_LONGDOUBLE:
       *(long double *) dest = *(long double *) source;
       break;
-#endif
     case FFI_TYPE_UINT8:
       *(ffi_arg *) dest = *(UINT8 *) source;
       break;
@@ -653,13 +652,11 @@ allocate_to_register_or_stack (struct call_context *context,
 	return allocate_to_d (context, state);
       state->nsrn = N_V_ARG_REG;
       break;
-#if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
     case FFI_TYPE_LONGDOUBLE:
       if (state->nsrn < N_V_ARG_REG)
 	return allocate_to_v (context, state);
       state->nsrn = N_V_ARG_REG;
       break;
-#endif
     case FFI_TYPE_UINT8:
     case FFI_TYPE_SINT8:
     case FFI_TYPE_UINT16:
@@ -722,9 +719,7 @@ aarch64_prep_args (struct call_context *context, unsigned char *stack,
 	   appropriate register, or if none are available, to the stack.  */
 	case FFI_TYPE_FLOAT:
 	case FFI_TYPE_DOUBLE:
-#if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
 	case FFI_TYPE_LONGDOUBLE:
-#endif
 	case FFI_TYPE_UINT8:
 	case FFI_TYPE_SINT8:
 	case FFI_TYPE_UINT16:
@@ -887,9 +882,7 @@ ffi_call (ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
               case FFI_TYPE_VOID:
               case FFI_TYPE_FLOAT:
               case FFI_TYPE_DOUBLE:
-#if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
               case FFI_TYPE_LONGDOUBLE:
-#endif
               case FFI_TYPE_UINT8:
               case FFI_TYPE_SINT8:
               case FFI_TYPE_UINT16:
@@ -1040,14 +1033,12 @@ ffi_closure_SYSV_inner (ffi_closure *closure, struct call_context *context,
 	case FFI_TYPE_POINTER:
 	case FFI_TYPE_UINT64:
 	case FFI_TYPE_SINT64:
-	case  FFI_TYPE_FLOAT:
+	case FFI_TYPE_FLOAT:
-	case  FFI_TYPE_DOUBLE:
+	case FFI_TYPE_DOUBLE:
-#if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
+	case FFI_TYPE_LONGDOUBLE:
-	case  FFI_TYPE_LONGDOUBLE:
 	  avalue[i] = allocate_to_register_or_stack (context, stack,
 						     &state, ty->type);
 	  break;
-#endif
 
 	case FFI_TYPE_STRUCT:
 	  h = is_hfa (ty);
@@ -1106,13 +1097,11 @@ ffi_closure_SYSV_inner (ffi_closure *closure, struct call_context *context,
 			break;
 		      }
 
-#if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
 		    case FFI_TYPE_LONGDOUBLE:
 			  memcpy (&avalue[i],
 				  allocate_to_v (context, &state),
 				  sizeof (*avalue));
 		      break;
-#endif
 
 		    default:
 		      FFI_ASSERT (0);
@@ -1183,9 +1172,7 @@ ffi_closure_SYSV_inner (ffi_closure *closure, struct call_context *context,
         case FFI_TYPE_SINT64:
         case FFI_TYPE_FLOAT:
         case FFI_TYPE_DOUBLE:
-#if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
         case FFI_TYPE_LONGDOUBLE:
-#endif
 	  {
 	    void *addr = get_basic_type_addr (cif->rtype->type, context, 0);
 	    copy_basic_type (addr, rvalue, cif->rtype->type);