/*
 * 86Box	A hypervisor and IBM PC system emulator that specializes in
 *		running old operating systems and software designed for IBM
 *		PC systems and compatibles from 1981 through fairly recent
 *		system designs based on the PCI bus.
 *
 *		This file is part of the 86Box distribution.
 *
 *		AMD SYSCALL and SYSRET CPU Instructions.
 *
 *
 *
 * Author:	Miran Grca, <mgrca8@gmail.com>
 *		Copyright 2016-2018 Miran Grca.
 */
static int
opSYSCALL(uint32_t fetchdat)
{
    int ret;

    ILLEGAL_ON(!(msr.amd_efer & 0x0000000000000001));

    ret = syscall_op(fetchdat);

    if (ret <= 1) {
	CLOCK_CYCLES(20);
	PREFETCH_RUN(20, 7, -1, 0,0,0,0, 0);
	PREFETCH_FLUSH();
	CPU_BLOCK_END();
    }

    return ret;
}


static int
opSYSRET(uint32_t fetchdat)
{
    int ret;

    ILLEGAL_ON(!(msr.amd_efer & 0x0000000000000001));

    ret = sysret(fetchdat);

    if (ret <= 1) {
	CLOCK_CYCLES(20);
	PREFETCH_RUN(20, 7, -1, 0,0,0,0, 0);
	PREFETCH_FLUSH();
	CPU_BLOCK_END();
    }

    return ret;
}