#ifndef _avcall_convex_c /*-*- C -*-*/
#define _avcall_convex_c
/**
Copyright 1993 Bill Triggs, <Bill.Triggs@inrialpes.fr>
Copyright 1995-1999 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.
**/
/*----------------------------------------------------------------------
!!! THIS ROUTINE MUST BE COMPILED gcc -O !!!
Foreign function interface for a Convex C2 with gcc.
This calls a C function with an argument list built up using macros
defined in av_call.h.
Convex Argument Passing Conventions:
All arguments are passed on the stack with word alignment. Doubles take
two words. Structure args are passed as true structures embedded in the
argument stack. To return a structure, the -fpcc-struct-return convention
is used.
Compile this routine with gcc -O (or -O2 or -g -O) to get the right
register variables, or use the assembler version.
----------------------------------------------------------------------*/
#include "avcall.h.in"
#define RETURN(TYPE,VAL) (*(TYPE*)l->raddr = (TYPE)(VAL))
int
__builtin_avcall(av_alist* l)
{
register __avword* sp __asm__("sp"); /* C names for registers */
register long long llret __asm__("s0");
register float fret __asm__("s0");
register double dret __asm__("s0");
__avword space[__AV_ALIST_WORDS]; /* space for callee's stack frame */
__avword* argframe = sp; /* stack offset for argument list */
int arglen = l->aptr - l->args;
__avword i;
{
int i;
for (i = 0; i < arglen; i++) /* push function args onto stack */
argframe[i] = l->args[i];
}
i = (*l->func)(); /* call function */
/* save return value */
if (l->rtype == __AVvoid) {
} else
if (l->rtype == __AVword) {
RETURN(__avword, i);
} else
if (l->rtype == __AVchar) {
RETURN(char, i);
} else
if (l->rtype == __AVschar) {
RETURN(signed char, i);
} else
if (l->rtype == __AVuchar) {
RETURN(unsigned char, i);
} else
if (l->rtype == __AVshort) {
RETURN(short, i);
} else
if (l->rtype == __AVushort) {
RETURN(unsigned short, i);
} else
if (l->rtype == __AVint) {
RETURN(int, i);
} else
if (l->rtype == __AVuint) {
RETURN(unsigned int, i);
} else
if (l->rtype == __AVlong) {
RETURN(long, i);
} else
if (l->rtype == __AVulong) {
RETURN(unsigned long, i);
} else
if (l->rtype == __AVlonglong) {
RETURN(long long, llret);
} else
if (l->rtype == __AVulonglong) {
RETURN(unsigned long long, llret);
} else
if (l->rtype == __AVfloat) {
RETURN(float, fret);
} else
if (l->rtype == __AVdouble) {
RETURN(double, dret);
} else
if (l->rtype == __AVvoidp) {
RETURN(void*, i);
} else
if (l->rtype == __AVstruct) {
if (l->flags & __AV_PCC_STRUCT_RETURN) {
/* pcc struct return convention: need a *(TYPE*)l->raddr = *(TYPE*)i; */
if (l->rsize == sizeof(char)) {
RETURN(char, *(char*)i);
} else
if (l->rsize == sizeof(short)) {
RETURN(short, *(short*)i);
} else
if (l->rsize == sizeof(int)) {
RETURN(int, *(int*)i);
} else
if (l->rsize == sizeof(double)) {
((int*)l->raddr)[0] = ((int*)i)[0];
((int*)l->raddr)[1] = ((int*)i)[1];
} else {
int n = (l->rsize + sizeof(__avword)-1)/sizeof(__avword);
while (--n >= 0)
((__avword*)l->raddr)[n] = ((__avword*)i)[n];
}
} else {
/* normal struct return convention */
if (l->flags & __AV_REGISTER_STRUCT_RETURN) {
if (l->rsize == sizeof(char)) {
RETURN(char, i);
} else
if (l->rsize == sizeof(short)) {
RETURN(short, i);
} else
if (l->rsize == sizeof(int)) {
RETURN(int, i);
} else
if (l->rsize == 2*sizeof(__avword)) {
RETURN(long long, llret);
}
}
}
}
return 0;
}
#endif /*_avcall_convex_c */