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/* vacall function for alpha CPU */
/*
* Copyright 1995-2017 Bruno Haible <bruno@clisp.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "vacall-internal.h"
#ifdef REENTRANT
#define vacall_receiver callback_receiver
register struct { void (*vacall_function) (void*,va_alist); void* arg; }
* env __asm__("$1");
#endif
register long arg1 __asm__("$16");
register long arg2 __asm__("$17");
register long arg3 __asm__("$18");
register long arg4 __asm__("$19");
register long arg5 __asm__("$20");
register long arg6 __asm__("$21");
register double farg1 __asm__("$f16");
register double farg2 __asm__("$f17");
register double farg3 __asm__("$f18");
register double farg4 __asm__("$f19");
register double farg5 __asm__("$f20");
register double farg6 __asm__("$f21");
register __vaword iret __asm__("$0");
register __vaword iret2 __asm__("$1");
register float fret __asm__("$f0");
register double dret __asm__("$f0");
/* The ABI requires that the first 6 general-purpose argument words are
being passed in registers, even if these words belong to a struct. No room
is allocated for these register words on the stack by the caller, but the
callee allocates room for them - at the right place in the stack frame,
that is, above the usual {fp, retaddr} combo - if and only if they are part
of a larger struct that extends to the stack and the address of this struct
is taken. */
struct gpargsequence {
__vaword word1; /* $16 */
__vaword word2; /* $17 */
__vaword word3; /* $18 */
__vaword word4; /* $19 */
__vaword word5; /* $20 */
__vaword word6; /* $21 */
__vaword firststackword;
};
#ifdef REENTRANT
static
#endif
void /* the return type is variable, not void! */
vacall_receiver (struct gpargsequence gpargs)
{
__va_alist list;
/* Move the arguments passed in registers to their stack locations. */
list.farg[0] = farg1;
list.farg[1] = farg2;
list.farg[2] = farg3;
list.farg[3] = farg4;
list.farg[4] = farg5;
list.farg[5] = farg6;
/* Prepare the va_alist. */
list.flags = 0;
list.aptr = (long)&gpargs;
list.raddr = (void*)0;
list.rtype = __VAvoid;
list.memargptr = (long)&gpargs.firststackword;
list.farg_offset = (long)&list.farg[0] - list.aptr;
/* Call vacall_function. The macros do all the rest. */
#ifndef REENTRANT
(*vacall_function) (&list);
#else /* REENTRANT */
(*env->vacall_function) (env->arg,&list);
#endif
/* Put return value into proper register. */
if (list.rtype == __VAvoid) {
} else
if (list.rtype == __VAchar) {
iret = list.tmp._char;
} else
if (list.rtype == __VAschar) {
iret = list.tmp._schar;
} else
if (list.rtype == __VAuchar) {
iret = list.tmp._uchar;
} else
if (list.rtype == __VAshort) {
iret = list.tmp._short;
} else
if (list.rtype == __VAushort) {
iret = list.tmp._ushort;
} else
if (list.rtype == __VAint) {
iret = list.tmp._int;
} else
if (list.rtype == __VAuint) {
iret = list.tmp._uint;
} else
if (list.rtype == __VAlong) {
iret = list.tmp._long;
} else
if (list.rtype == __VAulong) {
iret = list.tmp._ulong;
} else
if (list.rtype == __VAlonglong) {
iret = list.tmp._long;
} else
if (list.rtype == __VAulonglong) {
iret = list.tmp._ulong;
} else
if (list.rtype == __VAfloat) {
fret = list.tmp._float;
} else
if (list.rtype == __VAdouble) {
dret = list.tmp._double;
} else
if (list.rtype == __VAvoidp) {
iret = (long)list.tmp._ptr;
} else
if (list.rtype == __VAstruct) {
if (list.flags & __VA_REGISTER_STRUCT_RETURN) {
if (list.rsize == sizeof(char)) {
iret = *(unsigned char *) list.raddr;
} else
if (list.rsize == sizeof(short)) {
iret = *(unsigned short *) list.raddr;
} else
if (list.rsize == sizeof(int)) {
iret = *(unsigned int *) list.raddr;
} else
if (list.rsize == sizeof(long)) {
iret = *(unsigned long *) list.raddr;
} else
if (list.rsize == 2*sizeof(__vaword)) {
iret = ((__vaword *) list.raddr)[0];
iret2 = ((__vaword *) list.raddr)[1];
}
}
}
}
#ifdef REENTRANT
__vacall_r_t
callback_get_receiver (void)
{
return (__vacall_r_t)(void*)&callback_receiver;
}
#endif
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