minix/lib/ack/libm2/store.c

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/*
(c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands.
See the copyright notice in the ACK home directory, in the file "Copyright".
*/
/*
Module: store values from stack, byte by byte
Author: Ceriel J.H. Jacobs
Version: $Header$
*/
#include <m2_traps.h>
#ifndef EM_WSIZE
#define EM_WSIZE _EM_WSIZE
#define EM_PSIZE _EM_PSIZE
#endif
#if EM_WSIZE==EM_PSIZE
typedef unsigned pcnt;
#else
typedef long pcnt;
#endif
store(siz, addr, p)
register char *addr;
register pcnt siz;
{
/* Make sure, that a value with a size that could have been
handled by the LOI instruction is handled as if it was
loaded with the LOI instruction.
*/
register char *q = (char *) &p;
char t[4];
if (siz < EM_WSIZE && EM_WSIZE % siz == 0) {
/* as long as EM_WSIZE <= 4 ... */
if (siz != 2) TRP(M2_INTERNAL); /* internal error */
*((unsigned short *) (&t[0])) = *((unsigned *) q);
q = &t[0];
}
while (siz--) *addr++ = *q++;
}