/* vacall function for sparc CPU */
/*
* Copyright 1995-2005 Bruno Haible, <bruno@clisp.org>
*
* This is free software distributed under the GNU General Public Licence
* described in the file COPYING. Contact the author if you don't have this
* or can't live with it. There is ABSOLUTELY NO WARRANTY, explicit or implied,
* on this software.
*/
#ifndef REENTRANT
#include "vacall.h.in"
#else /* REENTRANT */
#include "vacall_r.h.in"
#endif
#ifdef REENTRANT
#define __vacall __vacall_r
register struct { void (*vacall_function) (void*,va_alist); void* arg; }
* env __asm__("%g2");
#endif
register __vaword* fp __asm__("%fp"); /* our %fp, caller's %sp */
register __vaword* ret __asm__("%i7"); /* %i7+8 = return address */
register int iret __asm__("%i0");
register int iret2 __asm__("%i1");
register float fret __asm__("%f0"); /* %f0 */
register double dret __asm__("%f0"); /* %f0,%f1 */
void /* the return type is variable, not void! */
__vacall (__vaword word1, __vaword word2, __vaword word3, __vaword word4,
__vaword word5, __vaword word6,
__vaword firstword)
{
__va_alist list;
/* gcc-2.6.3 source says: When a parameter is passed in a register,
* stack space is still allocated for it.
*/
/* Move the arguments passed in registers to their stack locations. */
(&firstword)[-6] = word1;
(&firstword)[-5] = word2;
(&firstword)[-4] = word3;
(&firstword)[-3] = word4;
(&firstword)[-2] = word5;
(&firstword)[-1] = word6;
/* Prepare the va_alist. */
list.flags = 0;
list.aptr = (long)(&firstword - 6);
list.raddr = (void*)0;
list.rtype = __VAvoid;
list.structraddr = (void*)((&firstword)[-7]); /* = (void*) fp[16] */
/* 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 || list.rtype == __VAulonglong) {
iret = ((__vaword *) &list.tmp._longlong)[0];
iret2 = ((__vaword *) &list.tmp._longlong)[1];
} else
if (list.rtype == __VAfloat) {
if (list.flags & __VA_SUNCC_FLOAT_RETURN) {
dret = (double)list.tmp._float;
} else {
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_SUNPROCC_STRUCT_RETURN) {
/* Sun cc struct return convention. */
/* The desired struct return address was passed in fp[16], later on
* list.raddr = list.structraddr = fp[16]. Now the result has
* already been copied there. No need to copy the result once more.
* The caller expects to receive the struct return address in %o0.
*/
iret = (long) list.raddr;
if ((list.rsize & 0xfff) == ret[2])
ret++; /* skip the "unimp n" instruction at the return address */
/* else the "unimp n" instruction will cause a core dump */
} else {
if (list.flags & __VA_PCC_STRUCT_RETURN) {
/* pcc struct return convention */
iret = (long) list.raddr;
} else {
/* normal struct return convention */
if (list.flags & __VA_SMALL_STRUCT_RETURN) {
if (list.rsize == sizeof(char)) {
iret = *(unsigned char *) list.raddr;
goto done;
} else
if (list.rsize == sizeof(short)) {
iret = *(unsigned short *) list.raddr;
goto done;
} else
if (list.rsize == sizeof(int)) {
iret = *(unsigned int *) list.raddr;
goto done;
}
}
ret++; /* skip the "unimp n" instruction at the return address */
done: ;
}
}
}
}