2008-02-13  Thiago Jung Bauermann  <bauerman@br.ibm.com>

	* amd64-tdep.c (amd64_classify): Add support for decimal float
	types.
	* i386-tdep.c (i386_return_value): Make 128-bit decimal float
	use the struct return convention.

diff -r 4210c09bccd5 -r ada730f9adc3 gdb/amd64-tdep.c
--- a/gdb/amd64-tdep.c	Mon Feb 11 03:15:07 2008 -0800
+++ b/gdb/amd64-tdep.c	Wed Feb 13 14:03:14 2008 -0200
@@ -364,15 +364,19 @@ amd64_classify (struct type *type, enum 
       && (len == 1 || len == 2 || len == 4 || len == 8))
     class[0] = AMD64_INTEGER;
 
-  /* Arguments of types float, double and __m64 are in class SSE.  */
-  else if (code == TYPE_CODE_FLT && (len == 4 || len == 8))
+  /* Arguments of types float, double, _Decimal32, _Decimal64 and __m64
+     are in class SSE.  */
+  else if ((code == TYPE_CODE_FLT || code == TYPE_CODE_DECFLOAT)
+	   && (len == 4 || len == 8))
     /* FIXME: __m64 .  */
     class[0] = AMD64_SSE;
 
-  /* Arguments of types __float128 and __m128 are split into two
-     halves.  The least significant ones belong to class SSE, the most
+  /* Arguments of types __float128, _Decimal128 and __m128 are split into
+     two halves.  The least significant ones belong to class SSE, the most
      significant one to class SSEUP.  */
-  /* FIXME: __float128, __m128.  */
+  else if (code == TYPE_CODE_DECFLOAT && len == 16)
+    /* FIXME: __float128, __m128.  */
+    class[0] = AMD64_SSE, class[1] = AMD64_SSEUP;
 
   /* The 64-bit mantissa of arguments of type long double belongs to
      class X87, the 16-bit exponent plus 6 bytes of padding belongs to
diff -r 4210c09bccd5 -r ada730f9adc3 gdb/i386-tdep.c
--- a/gdb/i386-tdep.c	Mon Feb 11 03:15:07 2008 -0800
+++ b/gdb/i386-tdep.c	Wed Feb 13 14:03:14 2008 -0200
@@ -1579,10 +1579,12 @@ i386_return_value (struct gdbarch *gdbar
 {
   enum type_code code = TYPE_CODE (type);
 
-  if ((code == TYPE_CODE_STRUCT
-       || code == TYPE_CODE_UNION
-       || code == TYPE_CODE_ARRAY)
-      && !i386_reg_struct_return_p (gdbarch, type))
+  if (((code == TYPE_CODE_STRUCT
+	|| code == TYPE_CODE_UNION
+	|| code == TYPE_CODE_ARRAY)
+       && !i386_reg_struct_return_p (gdbarch, type))
+      /* 128-bit decimal float uses the struct return convention.  */
+      || (code == TYPE_CODE_DECFLOAT && TYPE_LENGTH (type) == 16))
     {
       /* The System V ABI says that: