69 lines
954 B
C
69 lines
954 B
C
// The OS/K Team licences 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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#define _NEED_ARCH_I
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#include "arch_i.h"
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IMPL_START_0(nop)
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{
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}
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IMPL_END;
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//
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// Movement instructions
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//
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IMPL_START_2(mov)
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{
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v1 = v2;
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}
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IMPL_OUT;
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IMPL_START_2(xchg)
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{
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ulong t = v1;
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v1 = v2;
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v2 = t;
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}
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IMPL_OUT;
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IMPL_START_1(lea)
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{
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if (!p2->mem) {
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_except(ctx, E_ILL, "Bad LEA format");
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}
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v1 = (p2->type == A_REG ? ctx->r[p2->val].val : p2->val) + p2->off;
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}
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IMPL_OUT;
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IMPL_START_1(gcs)
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{
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v1 = ctx->r[CR1].val;
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}
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IMPL_OUT;
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//
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// Misc. instructions
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//
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IMPL_START_1(prn)
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{
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if (p1->mlen > 1) {
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log("prn warning: large access size\n");
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}
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if (!(v1 >= ' ' && v1 < 128) && v1 != '\t' && v1 != '\n') {
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log("prn on invalid character: %ld\n", v1);
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}
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else {
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putchar((int)v1);
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}
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}
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IMPL_END;
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