kvisc/vm/in/mov.c

// The OS/K Team licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

#include <in/instrs.h>

IMPL_COND(lea);
IMPL_COND(mov);
IMPL_COND(movb);
IMPL_COND(movw);
IMPL_COND(movl);
IMPL_COND(movt);
IMPL_COND(xchg);
IMPL_COND(cmpxchg);

/*
IMPL_COND(xchgb);
IMPL_COND(xchgw);
IMPL_COND(xchgl);
IMPL_COND(xchgt);
*/

//
// Movement instructions
//

IMPL_START_2(mov)
{
    v1 = v2;
}
IMPL_OUT;

IMPL_START_2(movb)
{
    v1 = (v1 & 0xFFFFFFFFFFFFFF00)
       | (v2 & 0x00000000000000FF);
}
IMPL_OUT;

IMPL_START_2(movw)
{
    v1 = (v1 & 0xFFFFFFFFFFFF0000)
       | (v2 & 0x000000000000FFFF);
}
IMPL_OUT;

IMPL_START_2(movl)
{
    v1 = (v1 & 0xFFFFFFFF00000000)
       | (v2 & 0x00000000FFFFFFFF);
}
IMPL_OUT;

IMPL_START_2(movt)
{
    v1 = (v1 & 0xFFFF000000000000)
       | (v2 & 0x0000FFFFFFFFFFFF);
}
IMPL_OUT;

IMPL_START_2(xchg)
{
    ulong t = v1;
    v1 = v2;
    v2 = t;
}
IMPL_OUT_2;

IMPL_START_1(lea)
{
    ulong v2 = (p2->type == A_REG ? R(p2->val) : p2->val);

    if (p2->mem) {
        v2 += p2->off + R(p2->offreg);
    }

    v1 = v2;
}
IMPL_OUT;

IMPL_START_1(gcs)
{
    v1 = cr1;
}
IMPL_OUT;

IMPL_START_2(cmpxchg)
{
    if (rax == v1) {
        flg |= ZF;
        v1 = v2;
    }

    else {
        flg &= ~ZF;
        rax = v1;
    }
}
IMPL_OUT;