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/*[
movsx.c
LOCAL CHAR SccsID[]="@(#)movsx.c 1.5 02/09/94";
MOVSX CPU Functions.
--------------------
]*/
#include <insignia.h>
#include <host_def.h>
#include <xt.h>
#include <c_main.h>
#include <c_addr.h>
#include <c_bsic.h>
#include <c_prot.h>
#include <c_seg.h>
#include <c_stack.h>
#include <c_xcptn.h>
#include <c_reg.h>
#include <movsx.h>
/*
=====================================================================
EXTERNAL ROUTINES START HERE
=====================================================================
*/
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
/* Generic - one size fits all 'movsx'. */
/* NB. This function sign extends to 32-bits. */
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
GLOBAL VOID
MOVSX
IFN3(
IU32 *, pop1, /* pntr to dst/lsrc operand */
IU32, op2, /* rsrc operand */
IUM8, op_sz /* 8 or 16-bit (original rsrc operand size) */
)
{
if ( SZ2MSB(op_sz) & op2 ) /* sign bit set? */
{
/* or in sign extension */
op2 = op2 | ~SZ2MASK(op_sz);
}
*pop1 = op2;
}
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