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kvisc/vm/in/jumps.c
2019-06-05 12:53:09 +02:00

70 lines
812 B
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(jmp);
IMPL_COND(loop);
//
// Jump instructions
//
IMPL_START_1(jmp)
{
JUMP(v1);
}
IMPL_END;
IMPL_START_1(loop)
{
if (rcx > 0) {
rcx--;
JUMP(v1);
}
}
IMPL_END;
IMPL_START_1(cjmpa)
{
if (!(flg & ZF) && !(flg & CF))
JUMP(v1);
}
IMPL_END;
IMPL_START_1(cjmpae)
{
if (!(flg & CF))
JUMP(v1);
}
IMPL_END;
IMPL_START_1(cjmpb)
{
if (!(flg & ZF) && flg & CF)
JUMP(v1);
}
IMPL_END;
IMPL_START_1(cjmpbe)
{
if (flg & CF)
JUMP(v1);
}
IMPL_END;
IMPL_START_1(jcxz)
{
if (!rcx)
JUMP(v1);
}
IMPL_END;
IMPL_START_1(jcxnz)
{
if (rcx)
JUMP(v1);
}
IMPL_END;