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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/. */
// Platform specific code to invoke XPCOM methods on native objects
#include "xptcall.h"
#include "xptinfo.h"
// 6 integral parameters are passed in registers, but 1 is |this| which isn't
// considered here.
const uint32_t GPR_COUNT = 5;
// 8 floating point parameters are passed in SSE registers
const uint32_t FPR_COUNT = 8;
extern "C" void
InvokeCopyToStack(uint64_t * gpregs, double * fpregs,
uint32_t paramCount, nsXPTCVariant * s,
uint64_t* d)
{
uint32_t nr_gpr = 0u;
uint32_t nr_fpr = 0u;
uint64_t value = 0u;
for (uint32_t i = 0; i < paramCount; i++, s++) {
if (s->IsIndirect())
value = (uint64_t) &s->val;
else {
switch (s->type) {
case nsXPTType::T_FLOAT: break;
case nsXPTType::T_DOUBLE: break;
case nsXPTType::T_I8: value = s->val.i8; break;
case nsXPTType::T_I16: value = s->val.i16; break;
case nsXPTType::T_I32: value = s->val.i32; break;
case nsXPTType::T_I64: value = s->val.i64; break;
case nsXPTType::T_U8: value = s->val.u8; break;
case nsXPTType::T_U16: value = s->val.u16; break;
case nsXPTType::T_U32: value = s->val.u32; break;
case nsXPTType::T_U64: value = s->val.u64; break;
case nsXPTType::T_BOOL: value = s->val.b; break;
case nsXPTType::T_CHAR: value = s->val.c; break;
case nsXPTType::T_WCHAR: value = s->val.wc; break;
default: value = (uint64_t) s->val.p; break;
}
}
if (!s->IsIndirect() && s->type == nsXPTType::T_DOUBLE) {
if (nr_fpr < FPR_COUNT)
fpregs[nr_fpr++] = s->val.d;
else {
*((double *)d) = s->val.d;
d++;
}
}
else if (!s->IsIndirect() && s->type == nsXPTType::T_FLOAT) {
if (nr_fpr < FPR_COUNT)
// The value in %xmm register is already prepared to
// be retrieved as a float. Therefore, we pass the
// value verbatim, as a double without conversion.
fpregs[nr_fpr++] = s->val.d;
else {
*((float *)d) = s->val.f;
d++;
}
}
else {
if (nr_gpr < GPR_COUNT)
gpregs[nr_gpr++] = value;
else
*d++ = value;
}
}
}
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