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67 lines
2 KiB
C++
67 lines
2 KiB
C++
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/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2013 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#include <alloy/backend/ivm/ivm_function.h>
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#include <alloy/backend/tracing.h>
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#include <alloy/runtime/thread_state.h>
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using namespace alloy;
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using namespace alloy::backend;
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using namespace alloy::backend::ivm;
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using namespace alloy::runtime;
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IVMFunction::IVMFunction(FunctionInfo* symbol_info) :
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register_count_(0), intcode_count_(0), intcodes_(0),
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GuestFunction(symbol_info) {
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}
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IVMFunction::~IVMFunction() {
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xe_free(intcodes_);
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}
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void IVMFunction::Setup(TranslationContext& ctx) {
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register_count_ = ctx.register_count;
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intcode_count_ = ctx.intcode_count;
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intcodes_ = (IntCode*)ctx.intcode_arena->CloneContents();
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}
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int IVMFunction::CallImpl(ThreadState* thread_state) {
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// Setup register file on stack.
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size_t register_file_size = register_count_ * sizeof(Register);
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Register* register_file = (Register*)alloca(register_file_size);
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IntCodeState ics;
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ics.rf = register_file;
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ics.context = (uint8_t*)thread_state->raw_context();
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ics.membase = thread_state->memory()->membase();
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ics.did_carry = 0;
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ics.thread_state = thread_state;
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ics.return_address = 0xBEBEBEBE;
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// TODO(benvanik): DID_CARRY -- need HIR to set a OPCODE_FLAG_SET_CARRY
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// or something so the fns can set an ics flag.
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uint32_t ia = 0;
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while (true) {
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const IntCode* i = &intcodes_[ia];
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uint32_t new_ia = i->intcode_fn(ics, i);
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if (new_ia == IA_NEXT) {
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ia++;
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} else if (new_ia == IA_RETURN) {
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break;
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} else {
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ia = new_ia;
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}
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}
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return 0;
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}
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