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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Franz.Sirl-kernel@lauterbach.com (Franz Sirl)
* beard@netscape.com (Patrick Beard)
* waterson@netscape.com (Chris Waterson)
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
// Platform specific code to invoke XPCOM methods on native objects
// The purpose of XPTC_InvokeByIndex() is to map a platform
// indepenpent call to the platform ABI. To do that,
// XPTC_InvokeByIndex() has to determine the method to call via vtable
// access. The parameters for the method are read from the
// nsXPTCVariant* and prepared for th native ABI. For the Linux/PPC
// ABI this means that the first 8 integral and floating point
// parameters are passed in registers.
#include "xptcprivate.h"
// 8 integral parameters are passed in registers
#define GPR_COUNT 8
// 8 floating point parameters are passed in registers, floats are
// promoted to doubles when passed in registers
#define FPR_COUNT 8
extern "C" PRUint32
invoke_count_words(PRUint32 paramCount, nsXPTCVariant* s)
{
return PRUint32(((paramCount * 2) + 3) & ~3);
}
extern "C" void
invoke_copy_to_stack(PRUint32* d,
PRUint32 paramCount,
nsXPTCVariant* s,
PRUint32* gpregs,
double* fpregs)
{
PRUint32 gpr = 1; // skip one GP reg for 'that'
PRUint32 fpr = 0;
PRUint32 tempu32;
PRUint64 tempu64;
for(uint32 i = 0; i < paramCount; i++, s++) {
if(s->IsPtrData())
tempu32 = (PRUint32) s->ptr;
else {
switch(s->type) {
case nsXPTType::T_FLOAT: break;
case nsXPTType::T_DOUBLE: break;
case nsXPTType::T_I8: tempu32 = s->val.i8; break;
case nsXPTType::T_I16: tempu32 = s->val.i16; break;
case nsXPTType::T_I32: tempu32 = s->val.i32; break;
case nsXPTType::T_I64: tempu64 = s->val.i64; break;
case nsXPTType::T_U8: tempu32 = s->val.u8; break;
case nsXPTType::T_U16: tempu32 = s->val.u16; break;
case nsXPTType::T_U32: tempu32 = s->val.u32; break;
case nsXPTType::T_U64: tempu64 = s->val.u64; break;
case nsXPTType::T_BOOL: tempu32 = s->val.b; break;
case nsXPTType::T_CHAR: tempu32 = s->val.c; break;
case nsXPTType::T_WCHAR: tempu32 = s->val.wc; break;
default: tempu32 = (PRUint32) s->val.p; break;
}
}
if (!s->IsPtrData() && s->type == nsXPTType::T_DOUBLE) {
if (fpr < FPR_COUNT)
fpregs[fpr++] = s->val.d;
else {
if ((PRUint32) d & 4) d++; // doubles are 8-byte aligned on stack
*((double*) d) = s->val.d;
d += 2;
}
}
else if (!s->IsPtrData() && s->type == nsXPTType::T_FLOAT) {
if (fpr < FPR_COUNT)
fpregs[fpr++] = s->val.f; // if passed in registers, floats are promoted to doubles
else
*((float*) d++) = s->val.f;
}
else if (!s->IsPtrData() && (s->type == nsXPTType::T_I64
|| s->type == nsXPTType::T_U64)) {
if ((gpr + 1) < GPR_COUNT) {
if (gpr & 1) gpr++; // longlongs are aligned in odd/even register pairs, eg. r5/r6
*((PRUint64*) &gpregs[gpr]) = tempu64;
gpr += 2;
}
else {
if ((PRUint32) d & 4) d++; // longlongs are 8-byte aligned on stack
*((PRUint64*) d) = tempu64;
d += 2;
}
}
else {
if (gpr < GPR_COUNT)
gpregs[gpr++] = tempu32;
else
*d++ = tempu32;
}
}
}
extern "C"
XPTC_PUBLIC_API(nsresult)
XPTC_InvokeByIndex(nsISupports* that, PRUint32 methodIndex,
PRUint32 paramCount, nsXPTCVariant* params);
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