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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "xptcprivate.h"
#if _HPUX
#error "This code is for HP-PA RISC 32 bit mode only"
#endif
#include <alloca.h>
typedef unsigned nsXPCVariant;
extern "C" int32_t
invoke_count_bytes(nsISupports* that, const uint32_t methodIndex,
const uint32_t paramCount, const nsXPTCVariant* s)
{
int32_t result = 4; /* variant records do not include self pointer */
/* counts the number of bytes required by the argument stack,
64 bit integer, and double requires 8 bytes. All else requires
4 bytes.
*/
{
uint32_t indx;
for (indx = paramCount; indx > 0; --indx, ++s)
{
if (! s->IsPtrData())
{
if (s->type == nsXPTType::T_I64 || s->type == nsXPTType::T_U64 ||
s->type == nsXPTType::T_DOUBLE)
{
/* 64 bit integer and double aligned on 8 byte boundaries */
result += (result & 4) + 8;
continue;
}
}
result += 4; /* all other cases use 4 bytes */
}
}
result -= 72; /* existing stack buffer is 72 bytes */
if (result < 0)
return 0;
{
/* round up to 64 bytes boundary */
int32_t remainder = result & 63;
return (remainder == 0) ? result : (result + 64 - remainder);
}
}
extern "C" uint32_t
invoke_copy_to_stack(uint32_t* d,
const uint32_t paramCount, nsXPTCVariant* s)
{
typedef struct
{
uint32_t hi;
uint32_t lo;
} DU;
uint32_t* dest = d;
nsXPTCVariant* source = s;
/* we clobber param vars by copying stuff on stack, have to use local var */
uint32_t floatflags = 0;
/* flag indicating which floating point registers to load */
uint32_t regwords = 1; /* register 26 is reserved for ptr to 'that' */
uint32_t indx;
for (indx = paramCount; indx > 0; --indx, --dest, ++source)
{
if (source->IsPtrData())
{
*((void**) dest) = source->ptr;
++regwords;
continue;
}
switch (source->type)
{
case nsXPTType::T_I8 : *((int32_t*) dest) = source->val.i8; break;
case nsXPTType::T_I16 : *((int32_t*) dest) = source->val.i16; break;
case nsXPTType::T_I32 : *((int32_t*) dest) = source->val.i32; break;
case nsXPTType::T_I64 :
case nsXPTType::T_U64 :
if (regwords & 1)
{
/* align on double word boundary */
--dest;
++regwords;
}
*((uint32_t*) dest) = ((DU *) source)->lo;
*((uint32_t*) --dest) = ((DU *) source)->hi;
/* big endian - hi word in low addr */
regwords += 2;
continue;
case nsXPTType::T_DOUBLE :
if (regwords & 1)
{
/* align on double word boundary */
--dest;
++regwords;
}
switch (regwords) /* load double precision float register */
{
case 2:
floatflags |= 1;
}
*((uint32_t*) dest) = ((DU *) source)->lo;
*((uint32_t*) --dest) = ((DU *) source)->hi;
/* big endian - hi word in low addr */
regwords += 2;
continue;
case nsXPTType::T_FLOAT :
switch (regwords) /* load single precision float register */
{
case 1:
floatflags |= 2;
break;
case 2:
floatflags |= 4;
break;
case 3:
floatflags |= 8;
}
*((float*) dest) = source->val.f;
break;
case nsXPTType::T_U8 : *((uint32_t*) (dest)) = source->val.u8; break;
case nsXPTType::T_U16 : *((uint32_t*) (dest)) = source->val.u16; break;
case nsXPTType::T_U32 : *((uint32_t*) (dest)) = source->val.u32; break;
case nsXPTType::T_BOOL : *((uint32_t*) (dest)) = source->val.b; break;
case nsXPTType::T_CHAR : *((uint32_t*) (dest)) = source->val.c; break;
case nsXPTType::T_WCHAR : *((int32_t*) (dest)) = source->val.wc; break;
default:
// all the others are plain pointer types
*((void**) dest) = source->val.p;
}
++regwords;
}
return floatflags;
}
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