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kvisc/pc/instrs/instrs.c

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2019-05-29 16:57:22 +02:00
// The OS/K Team licences this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#include "instrs.h"
#include "arch_i.h"
#define _NEED_ARCH_I
#include "arch_i.h"
IMPL_START_0(nop)
{
}
IMPL_END;
//
// Movement instructions
//
IMPL_START_2(mov)
{
v1 = v2;
}
IMPL_OUT;
IMPL_START_2(xchg)
{
ulong t = v1;
v1 = v2;
v2 = t;
}
IMPL_OUT;
IMPL_START_1(lea)
{
assert(p2->mem);
v1 = (p2->type == A_REG ? ctx->r[p2->val].val : p2->val) + p2->off;
}
IMPL_OUT;
IMPL_START_1(gcs)
{
v1 = ctx->r[CR1].val;
}
IMPL_OUT;
//
// Misc. instructions
//
IMPL_START_1(prn)
{
if (p1->mlen > 1) {
log("prn warning: large access size\n");
}
if (!(v1 >= ' ' && v1 < 128) && v1 != '\t') {
if (v1 == '\n') {
log("prn on newline character\n");
}
else
log("prn on invalid character: %ld\n", v1);
}
else {
log("prn instruction with character: '%c'\n", (char)v1);
}
}
IMPL_END;