// 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>

//
// Stack manipulation instructions
//

IMPL_START_1(push)
{
    R(RSP) -= 8;
    writemem(ctx, v1, R(RSP), 8);
}
IMPL_END;

IMPL_START_1(pop)
{
    v1 = readmem(ctx, R(RSP), 8);
    R(RSP) += 8;
}
IMPL_OUT;

IMPL_START_1(call)
{
    R(RSP) -= 8;
    writemem(ctx, R(RIP), R(RSP), 8);

    R(RIP) = v1;
}
IMPL_END;

IMPL_START_0(ret)
{
    R(RIP) = readmem(ctx, R(RSP), 8);
    R(RSP) += 8;
}
IMPL_END;

IMPL_START_0(enter)
{
    writemem(ctx, R(RBP), R(RSP) - 8, 8);
    R(RBP) = R(RSP) - 8;
    R(RSP) -= (p1->val + 1) * 8;
}
IMPL_END;

IMPL_START_0(leave)
{
    R(RSP) = R(RBP) + 8;
    R(RBP) = readmem(ctx, R(RBP), 8);
}
IMPL_END;