/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 */

/* Platform specific code to invoke XPCOM methods on native objects */

#include "xptcprivate.h"

#if !defined(__sparc64__) && !defined(_LP64)
#error "This code is for Sparc64 only"
#endif

extern "C" PRUint32
invoke_copy_to_stack(PRUint64* d, PRUint32 paramCount, nsXPTCVariant* s)
{
  /*
    We need to copy the parameters for this function to locals and use them
    from there since the parameters occupy the same stack space as the stack
    we're trying to populate.
  */
  PRUint64 *l_d = d;
  nsXPTCVariant *l_s = s;
  PRUint64 l_paramCount = paramCount;
  PRUint64 regCount = 0;  // return the number of registers to load from the stack

  for(PRUint64 i = 0; i < l_paramCount; i++, l_d++, l_s++)
  {
    if (regCount < 5) regCount++;

    if (l_s->IsPtrData())
    {
      *l_d = (PRUint64)l_s->ptr;
      continue;
    }
    switch (l_s->type)
    {
      case nsXPTType::T_I8    : *((PRInt64*)l_d)     = l_s->val.i8;    break;
      case nsXPTType::T_I16   : *((PRInt64*)l_d)     = l_s->val.i16;   break;
      case nsXPTType::T_I32   : *((PRInt64*)l_d)     = l_s->val.i32;   break;
      case nsXPTType::T_I64   : *((PRInt64*)l_d)     = l_s->val.i64;   break;
      
      case nsXPTType::T_U8    : *((PRUint64*)l_d)    = l_s->val.u8;    break;
      case nsXPTType::T_U16   : *((PRUint64*)l_d)    = l_s->val.u16;   break;
      case nsXPTType::T_U32   : *((PRUint64*)l_d)    = l_s->val.u32;   break;
      case nsXPTType::T_U64   : *((PRUint64*)l_d)    = l_s->val.u64;   break;

      /* in the case of floats, we want to put the bits in to the
         64bit space right justified... floats in the paramter array on
         sparcv9 use odd numbered registers.. %f1, %f3, so we have to skip
         the space that would be occupied by %f0, %f2, etc.
      */
      case nsXPTType::T_FLOAT : *(((float*)l_d) + 1) = l_s->val.f;     break;
      case nsXPTType::T_DOUBLE: *((double*)l_d)      = l_s->val.d;     break;
      case nsXPTType::T_BOOL  : *((PRInt64*)l_d)      = l_s->val.b;     break;
      case nsXPTType::T_CHAR  : *((PRUint64*)l_d)    = l_s->val.c;     break;
      case nsXPTType::T_WCHAR : *((PRInt64*)l_d)     = l_s->val.wc;    break;

      default:
        // all the others are plain pointer types
        *((void**)l_d) = l_s->val.p;
        break;
    }
  }
  
  return regCount;
}