* alpha-tdep.c (alpha_push_dummy_call): Handle COMPLEX types.

        (alpha_extract_return_value): Likewise.
        (alpha_store_return_value): Likewise.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 2460477..2f337d9 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,9 @@
 2003-06-02  Richard Henderson  <rth@redhat.com>
 
+        * alpha-tdep.c (alpha_push_dummy_call): Handle COMPLEX types.
+        (alpha_extract_return_value): Likewise.
+        (alpha_store_return_value): Likewise.
+
         * alpha-tdep.c (alpha_extract_return_value): Handle IEEE Quad floats.
         (alpha_store_return_value): Error on IEEE Quad floats.
 

diff --git a/gdb/alpha-tdep.c b/gdb/alpha-tdep.c
index e97ff30..ff5fe7a 100644 (file)
--- a/gdb/alpha-tdep.c
+++ b/gdb/alpha-tdep.c
@@ -282,6 +282,7 @@ alpha_push_dummy_call (struct gdbarch *gdbarch, CORE_ADDR func_addr,
              arg = value_cast (arg_type, arg);
            }
          break;
+
        case TYPE_CODE_FLT:
          /* "float" arguments loaded in registers must be passed in
             register format, aka "double".  */
@@ -306,6 +307,28 @@ alpha_push_dummy_call (struct gdbarch *gdbarch, CORE_ADDR func_addr,
              arg = value_from_pointer (arg_type, sp);
            }
          break;
+
+       case TYPE_CODE_COMPLEX:
+         /* ??? The ABI says that complex values are passed as two
+            separate scalar values.  This distinction only matters
+            for complex float.  However, GCC does not implement this.  */
+
+         /* Tru64 5.1 has a 128-bit long double, and passes this by
+            invisible reference.  */
+         if (TYPE_LENGTH (arg_type) == 32)
+           {
+             /* Allocate aligned storage.  */
+             sp = (sp & -16) - 16;
+
+             /* Write the real data into the stack.  */
+             write_memory (sp, VALUE_CONTENTS (arg), 32);
+
+             /* Construct the indirection.  */
+             arg_type = lookup_pointer_type (arg_type);
+             arg = value_from_pointer (arg_type, sp);
+           }
+         break;
+
        default:
          break;
        }
@@ -384,13 +407,14 @@ static void
 alpha_extract_return_value (struct type *valtype, struct regcache *regcache,
                            void *valbuf)
 {
+  int length = TYPE_LENGTH (valtype);
   char raw_buffer[ALPHA_REGISTER_SIZE];
   ULONGEST l;
 
   switch (TYPE_CODE (valtype))
     {
     case TYPE_CODE_FLT:
-      switch (TYPE_LENGTH (valtype))
+      switch (length)
        {
        case 4:
          regcache_cooked_read (regcache, ALPHA_FP0_REGNUM, raw_buffer);
@@ -411,10 +435,34 @@ alpha_extract_return_value (struct type *valtype, struct regcache *regcache,
        }
       break;
 
+    case TYPE_CODE_COMPLEX:
+      switch (length)
+       {
+       case 8:
+         /* ??? This isn't correct wrt the ABI, but it's what GCC does.  */
+         regcache_cooked_read (regcache, ALPHA_FP0_REGNUM, valbuf);
+         break;
+
+       case 16:
+         regcache_cooked_read (regcache, ALPHA_FP0_REGNUM, valbuf);
+         regcache_cooked_read (regcache, ALPHA_FP0_REGNUM+1,
+                               (char *)valbuf + 8);
+         break;
+
+       case 32:
+         regcache_cooked_read_signed (regcache, ALPHA_V0_REGNUM, &l);
+         read_memory (l, valbuf, 32);
+         break;
+
+       default:
+         abort ();
+       }
+      break;
+
     default:
       /* Assume everything else degenerates to an integer.  */
       regcache_cooked_read_unsigned (regcache, ALPHA_V0_REGNUM, &l);
-      store_unsigned_integer (valbuf, TYPE_LENGTH (valtype), l);
+      store_unsigned_integer (valbuf, length, l);
       break;
     }
 }
@@ -466,6 +514,31 @@ alpha_store_return_value (struct type *valtype, struct regcache *regcache,
        }
       break;
 
+    case TYPE_CODE_COMPLEX:
+      switch (length)
+       {
+       case 8:
+         /* ??? This isn't correct wrt the ABI, but it's what GCC does.  */
+         regcache_cooked_write (regcache, ALPHA_FP0_REGNUM, valbuf);
+         break;
+
+       case 16:
+         regcache_cooked_write (regcache, ALPHA_FP0_REGNUM, valbuf);
+         regcache_cooked_write (regcache, ALPHA_FP0_REGNUM+1,
+                                (const char *)valbuf + 8);
+         break;
+
+       case 32:
+         /* FIXME: 128-bit long doubles are returned like structures:
+            by writing into indirect storage provided by the caller
+            as the first argument.  */
+         error ("Cannot set a 128-bit long double return value.");
+
+       default:
+         abort ();
+       }
+      break;
+
     default:
       /* Assume everything else degenerates to an integer.  */
       l = unpack_long (valtype, valbuf);