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/*[
xor.c
LOCAL CHAR SccsID[]="@(#)xor.c 1.5 02/09/94";
XOR 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 <xor.h>
/*
=====================================================================
EXTERNAL FUNCTIONS START HERE.
=====================================================================
*/
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
/* Generic - one size fits all 'xor'. */
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
GLOBAL VOID
XOR
IFN3(
IU32 *, pop1, /* pntr to dst/lsrc operand */
IU32, op2, /* rsrc operand */
IUM8, op_sz /* 8, 16 or 32-bit */
)
{
IU32 result;
result = *pop1 ^ op2; /* Do operation */
SET_CF(0); /* Determine flags */
SET_OF(0);
SET_AF(0);
SET_PF(pf_table[result & BYTE_MASK]);
SET_ZF(result == 0);
SET_SF((result & SZ2MSB(op_sz)) != 0); /* SF = MSB */
*pop1 = result; /* Return answer */
}
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