206 lines
3.4 KiB
C
206 lines
3.4 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(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(movb, 2) { SRCP(p2); *r1 = (ulong)(long)(char)p2->val; return 1; }
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IMPL_START(movw, 2) { SRCP(p2); *r1 = (ulong)(long)(short)p2->val; return 1; }
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IMPL_START(movd, 2) { SRCP(p2); *r1 = (ulong)(long)(int)p2->val; return 1; }
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IMPL_START(nul, 1) { *r1 = 0; return 1; }
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IMPL_START(nul, 2) { *r1 = 0; *r2 = 0; return 2; }
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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(ESP) -= 8;
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writemem(p1->val, R(ESP), 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(ESP) -= 16;
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writemem(p1->val, R(ESP) + 8, 8);
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writemem(p2->val, R(ESP) + 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(ESP) -= 24;
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writemem(p1->val, R(ESP) + 16, 8);
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writemem(p2->val, R(ESP) + 8, 8);
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writemem(p3->val, R(ESP) + 0, 8);
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return 0;
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}
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//----------------------------------------------------------------------------//
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IMPL_START(pop, 0)
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{
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R(ESP) += 8;
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return 0;
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}
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IMPL_START(pop, 1)
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{
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*r1 = readmemzx(R(ESP), 8);
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R(ESP) += 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(ESP) + 0, 8);
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*r2 = readmemzx(R(ESP) + 8, 8);
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R(ESP) += 16;
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return 2;
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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(ESP) -= 8;
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writemem(R(EIP), R(ESP), 8);
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R(EIP) = 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(ESP) -= 8;
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writemem(R(EIP), R(ESP), 8);
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R(EIP) = 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(ESP) -= 8;
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writemem(R(EIP), R(ESP), 8);
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R(EIP) = 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(EIP) = readmemzx(R(ESP), 8);
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R(ESP) += 8;
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return 0;
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}
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IMPL_START(ret, 1)
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{
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R(EIP) = readmemzx(R(ESP), 8);
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R(ESP) += 8 + (p1->val * 8);
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return 0;
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}
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//----------------------------------------------------------------------------//
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IMPL_START(enter, 0)
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{
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R(ESP) -= 8;
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writemem(R(EBP), R(ESP), 8);
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R(EBP) = R(ESP);
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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(EBP), R(ESP) - 8, 8);
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R(EBP) = R(ESP) - 8;
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R(ESP) -= (p1->val + 1) * 8;
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return 0;
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}
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IMPL_START(enter, 2)
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{
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ulong i, tmp;
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R(ESP) -= 8;
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tmp = R(ESP);
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writemem(R(EBP), R(ESP), 8);
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for (i = 0; i < p2->val; i++)
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{
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R(EBP) -= 8;
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R(ESP) -= 8;
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writemem(R(EBP), R(ESP), 8);
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}
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R(EBP) = tmp;
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R(ESP) = tmp - (p1->val * 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(ESP) = R(EBP) + 8;
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R(EBP) = readmemzx(R(EBP), 8);
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return 0;
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}
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//----------------------------------------------------------------------------//
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