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77 lines
1.8 KiB
C
77 lines
1.8 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_1(jmp) { R(RIP) = v1; } IMPL_END;
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IMPL_START_1(loop) {
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if (R(RCX) > 0) {
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R(RCX)--;
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R(RIP) = v1;
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}
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}
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IMPL_END;
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IMPL_START_3(b) {
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COMPARE(v1, v2);
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if (eval_cond(ctx, ctx->cond))
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R(RIP) = v3;
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}
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IMPL_END;
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//----------------------------------------------------------------------------//
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IMPL_START_X_NOIN(lea) { v1 = p2->addr; } IMPL_OUT;
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IMPL_START_2_ONLY(mov) { v1 = v2; } IMPL_OUT;
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IMPL_START_2_ONLY(movsxb) { v1 = (ulong)(long)(char)(v2 & 0xFF); }IMPL_OUT;
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IMPL_START_2_ONLY(movsxw) { v1 = (ulong)(long)(short)(v2 & 0xFFFF); }IMPL_OUT;
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IMPL_START_2_ONLY(movsxl) { v1 = (ulong)(long)(int)(v2 & 0xFFFFFFFF); }IMPL_OUT;
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IMPL_START_X_NOIN(movzx) { DECVZX(v2, p2); v1 = v2; } IMPL_OUT;
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IMPL_START_2(xchg) { ulong t = v1; v1 = v2; v2 = t; } IMPL_OUT_2;
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//----------------------------------------------------------------------------//
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//
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// Stack manipulation instructions
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//
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IMPL_START_1(push) {
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R(RSP) -= 8;
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writemem(ctx, v1, R(RSP), 8);
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} IMPL_END;
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IMPL_START_1(pop) {
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v1 = readmem(ctx, R(RSP), 8);
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R(RSP) += 8;
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} IMPL_OUT;
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IMPL_START_1(call) {
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R(RSP) -= 8;
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writemem(ctx, R(RIP), R(RSP), 8);
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R(RIP) = v1;
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} IMPL_END;
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IMPL_START_0(ret) {
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R(RIP) = readmem(ctx, R(RSP), 8); R(RSP) += 8;
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} IMPL_END;
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IMPL_START_1(enter) {
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writemem(ctx, R(RBP), R(RSP) - 8, 8);
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R(RBP) = R(RSP) - 8;
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R(RSP) -= (v1 + 1) * 8;
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} IMPL_END;
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IMPL_START_0(leave) {
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R(RSP) = R(RBP) + 8;
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R(RBP) = readmem(ctx, R(RBP), 8);
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} IMPL_END;
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//----------------------------------------------------------------------------//
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