209 lines
3.5 KiB
C
209 lines
3.5 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 <in/instrs.h>
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//----------------------------------------------------------------------------//
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IMPL_START(jmp, 1) { R(RIP) = p1->val; return 0; }
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IMPL_START(loop, 1) {
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if (R(RCX) > 0) {
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R(RCX)--;
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R(RIP) = p1->val;
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}
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return 0;
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}
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IMPL_START(bch, 3)
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{
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SRCP(p1);
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SRCP(p2);
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COMPARE_SUB(p1->val, p2->val);
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if (eval_cond(ctx->cond))
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R(RIP) = p3->val;
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return 0;
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}
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IMPL_START(cmp, 2)
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{
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SRCP(p1);
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COMPARE_SUB(p1->val, p2->val);
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return 0;
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}
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//----------------------------------------------------------------------------//
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IMPL_START(lea, 2) { *r1 = p2->addr; return 1; }
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IMPL_START(mov, 2) { XSRCP(*r1, p2, sx); return 1; }
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IMPL_START(movzx, 2) { XSRCP(*r1, p2, zx); return 1; }
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IMPL_START(movsxb, 2) { SRCP(p2); *r1 = (ulong)(long)(char)p2->val; return 1; }
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IMPL_START(movsxw, 2) { SRCP(p2); *r1 = (ulong)(long)(short)p2->val; return 1; }
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IMPL_START(movsxd, 2) { SRCP(p2); *r1 = (ulong)(long)(int)p2->val; return 1; }
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IMPL_START(xchg, 2)
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{
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SRCP(p1);
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SRCP(p2);
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*r2 = p1->val;
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*r1 = p2->val;
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return 2;
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}
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//----------------------------------------------------------------------------//
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IMPL_START(push, 1)
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{
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XSRCP(p1->val, p1, zx);
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R(RSP) -= 8;
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writemem(p1->val, R(RSP), 8);
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return 0;
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}
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IMPL_START(push, 2)
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{
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XSRCP(p1->val, p1, zx);
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XSRCP(p2->val, p2, zx);
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R(RSP) -= 16;
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writemem(p1->val, R(RSP) + 8, 8);
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writemem(p2->val, R(RSP) + 0, 8);
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return 0;
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}
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IMPL_START(push, 3)
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{
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XSRCP(p1->val, p1, zx);
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XSRCP(p2->val, p2, zx);
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XSRCP(p3->val, p3, zx);
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R(RSP) -= 24;
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writemem(p1->val, R(RSP) + 16, 8);
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writemem(p2->val, R(RSP) + 8, 8);
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writemem(p3->val, R(RSP) + 0, 8);
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return 0;
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}
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//----------------------------------------------------------------------------//
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IMPL_START(pop, 1)
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{
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*r1 = readmemzx(R(RSP), 8);
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R(RSP) += 8;
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return 1;
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}
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IMPL_START(pop, 2)
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{
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*r1 = readmemzx(R(RSP) + 0, 8);
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*r2 = readmemzx(R(RSP) + 8, 8);
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R(RSP) += 16;
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return 2;
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}
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IMPL_START(pop, 3)
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{
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*r1 = readmemzx(R(RSP) + 0, 8);
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*r2 = readmemzx(R(RSP) + 8, 8);
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*r3 = readmemzx(R(RSP) + 16, 8);
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R(RSP) += 24;
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return 3;
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}
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//----------------------------------------------------------------------------//
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IMPL_START(call, 1)
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{
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SRCP(p1);
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R(RSP) -= 8;
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writemem(R(RIP), R(RSP), 8);
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R(RIP) = p1->val;
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return 0;
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}
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IMPL_START(call, 2)
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{
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SRCP(p1);
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SRCP(p2);
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R(RSP) -= 8;
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writemem(R(RIP), R(RSP), 8);
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R(RIP) = p1->val;
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R(AX0) = p2->val;
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return 0;
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}
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IMPL_START(call, 3)
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{
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SRCP(p1);
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SRCP(p2);
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SRCP(p3);
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R(RSP) -= 8;
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writemem(R(RIP), R(RSP), 8);
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R(RIP) = p1->val;
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R(AX0) = p2->val;
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R(AX1) = p3->val;
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return 0;
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}
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//----------------------------------------------------------------------------//
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IMPL_START(ret, 0)
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{
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R(RIP) = readmemzx(R(RSP), 8);
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R(RSP) += 8;
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return 0;
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}
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IMPL_START(enter, 0)
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{
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R(RSP) -= 8;
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writemem(R(RBP), R(RSP), 8);
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R(RBP) = R(RSP);
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return 0;
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}
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IMPL_START(enter, 1)
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{
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writemem(R(RBP), R(RSP) - 8, 8);
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R(RBP) = R(RSP) - 8;
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R(RSP) -= (p1->val + 1) * 8;
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return 0;
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}
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IMPL_START(leave, 0)
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{
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R(RSP) = R(RBP) + 8;
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R(RBP) = readmemzx(R(RBP), 8);
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return 0;
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}
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//----------------------------------------------------------------------------//
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