* config/rs6000/rs6000.c (rs6000_arg_partial_bytes): Update comments.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@97242 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 69af480..0a63204 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,7 @@
 2005-03-30  Alan Modra  <amodra@bigpond.net.au>
 
+       * config/rs6000/rs6000.c (rs6000_arg_partial_bytes): Update comments.
+
        * calls.c (struct arg_data): Update "partial" comment.
        (load_register_parameters): Update "nregs" comment.
 

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 3ac7c83..831b8c2 100644 (file)
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -4957,10 +4957,10 @@ function_arg (CUMULATIVE_ARGS *cum, enum machine_mode mode,
 }
 \f
 /* For an arg passed partly in registers and partly in memory, this is
-   the number of registers used.  For args passed entirely in registers
-   or entirely in memory, zero.  When an arg is described by a PARALLEL,
-   perhaps using more than one register type, this function returns the
-   number of bytes of registers used by the PARALLEL.  */
+   the number of bytes passed in registers.  For args passed entirely in
+   registers or entirely in memory, zero.  When an arg is described by a
+   PARALLEL, perhaps using more than one register type, this function
+   returns the number of bytes used by the first element of the PARALLEL.  */
 
 static int
 rs6000_arg_partial_bytes (CUMULATIVE_ARGS *cum, enum machine_mode mode,
@@ -4985,9 +4985,10 @@ rs6000_arg_partial_bytes (CUMULATIVE_ARGS *cum, enum machine_mode mode,
   align_words = rs6000_parm_start (mode, type, cum->words);
 
   if (USE_FP_FOR_ARG_P (cum, mode, type)
-      /* If we are passing this arg in gprs as well, then this function
-        should return the number of gprs (or memory) partially passed,
-        *not* the number of fprs.  */
+      /* If we are passing this arg in the fixed parameter save area
+        (gprs or memory) as well as fprs, then this function should
+        return the number of bytes passed in the parameter save area
+        rather than bytes passed in fprs.  */ 
       && !(type
           && (cum->nargs_prototype <= 0
               || (DEFAULT_ABI == ABI_AIX