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/*
Package: dyncall
Library: dyncallback
File: dyncallback/dyncall_args_arm32_arm.c
Description: Callback's Arguments VM - Implementation for ARM32 (ARM mode)
License:
Copyright (c) 2007-2011 Daniel Adler <dadler@uni-goettingen.de>,
Tassilo Philipp <tphilipp@potion-studios.com>
Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "dyncall_args_arm32_arm.h"
static void arm_align_64(DCArgs* args)
{
/* Look at signature to see if current calling convention needs alignment */
/* or not (e.g. EABI has different alignment). If nothing specified, fall */
/* back to default behaviour for this platform. */
/* @@@ check signature string */
int sig =
#if defined(DC__ABI_ARM_EABI)
0; /* EABI */
#else
1; /* ATPCS */
#endif
if(sig == 0) {
if(args->reg_count < 4)
args->reg_count = (args->reg_count+1)&~1;
if(args->reg_count >= 4 && (int)args->stack_ptr & 4)
++args->stack_ptr;
}
}
static void* arm_word(DCArgs* args)
{
if(args->reg_count < 4)
return &args->reg_data[args->reg_count++];
else
return (void*)args->stack_ptr++;
}
static DCdouble arm_double(DCArgs* args)
{
union {
DCdouble d;
DClong l[2];
} d;
arm_align_64(args);
d.l[0] = *(DClong*)arm_word(args);
d.l[1] = *(DClong*)arm_word(args);
return d.d;
}
static DClonglong arm_longlong(DCArgs* args)
{
union {
DClonglong ll;
DClong l[2];
} ll;
arm_align_64(args);
ll.l[0] = *(DClong*)arm_word(args);
ll.l[1] = *(DClong*)arm_word(args);
return ll.ll;
}
// ----------------------------------------------------------------------------
// C API implementation:
// base operations:
DClonglong dcbArgLongLong (DCArgs* p) { return arm_longlong(p); }
DClong dcbArgLong (DCArgs* p) { return *(DClong*)arm_word(p); }
DCint dcbArgInt (DCArgs* p) { return (DCint) dcbArgLong(p); }
DCchar dcbArgChar (DCArgs* p) { return (DCchar) dcbArgLong(p); }
DCshort dcbArgShort (DCArgs* p) { return (DCshort) dcbArgLong(p); }
DCbool dcbArgBool (DCArgs* p) { return (dcbArgLong(p) == 0) ? 0 : 1; }
DCuint dcbArgUInt (DCArgs* p) { return (DCuint) dcbArgInt(p); }
DCuchar dcbArgUChar (DCArgs* p) { return (DCuchar) dcbArgChar(p); }
DCushort dcbArgUShort (DCArgs* p) { return (DCushort) dcbArgShort(p); }
DCulong dcbArgULong (DCArgs* p) { return (DCulong) dcbArgLong(p); }
DCulonglong dcbArgULongLong(DCArgs* p) { return (DCulonglong)dcbArgLongLong(p); }
DCpointer dcbArgPointer (DCArgs* p) { return (DCpointer) dcbArgLong(p); }
DCdouble dcbArgDouble (DCArgs* p) { return arm_double(p); }
DCfloat dcbArgFloat (DCArgs* p) { return *(DCfloat*) arm_word(p); }
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