88 lines
1.1 KiB
C
88 lines
1.1 KiB
C
// The OS/K Team licenses this file to you under the MIT license.
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// See the LICENSE file in the project root for more information.
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#include "instrs.h"
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#include "arch_i.h"
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//
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// Jump instructions
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//
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IMPL_START_1(jmp)
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{
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JUMP(v1);
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}
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IMPL_END;
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IMPL_START_1(loop)
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{
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if (ctx->r[RCX].val > 0) {
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ctx->r[RCX].val--;
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JUMP(v1);
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}
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}
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IMPL_END;
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IMPL_START_1(jz)
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{
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if (ctx->r[FLG].val & ZF)
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JUMP(v1);
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}
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IMPL_END;
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IMPL_START_1(jnz)
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{
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if (!(ctx->r[FLG].val & ZF))
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JUMP(v1);
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}
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IMPL_END;
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IMPL_START_1(je)
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{
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if (ctx->r[FLG].val & ZF)
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JUMP(v1);
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}
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IMPL_END;
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IMPL_START_1(jne)
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{
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if (!(ctx->r[FLG].val & ZF))
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JUMP(v1);
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}
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IMPL_END;
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IMPL_START_1(ja)
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{
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if (!(ctx->r[FLG].val & ZF) && !(ctx->r[FLG].val & CF))
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JUMP(v1);
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}
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IMPL_END;
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IMPL_START_1(jae)
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{
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if (!(ctx->r[FLG].val & CF))
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JUMP(v1);
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}
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IMPL_END;
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IMPL_START_1(jb)
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{
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if (!(ctx->r[FLG].val & ZF) && ctx->r[FLG].val & CF)
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JUMP(v1);
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}
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IMPL_END;
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IMPL_START_1(jbe)
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{
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if (ctx->r[FLG].val & CF)
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JUMP(v1);
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}
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IMPL_END;
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IMPL_START_1(jcxz)
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{
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if (!ctx->r[RCX].val)
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JUMP(v1);
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}
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IMPL_END;
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