72 lines
1.5 KiB
C++
72 lines
1.5 KiB
C++
namespace factor
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{
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struct jit {
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cell type;
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gc_root<object> owner;
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growable_byte_array code;
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growable_byte_array relocation;
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growable_array literals;
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bool computing_offset_p;
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fixnum position;
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cell offset;
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factor_vm *parent_vm;
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explicit jit(cell jit_type, cell owner, factor_vm *vm);
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void compute_position(cell offset);
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void emit_relocation(cell code_template);
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void emit(cell code_template);
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void literal(cell literal) { literals.add(literal); }
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void emit_with(cell code_template_, cell literal_);
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void push(cell literal) {
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emit_with(parent_vm->userenv[JIT_PUSH_IMMEDIATE],literal);
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}
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void word_jump(cell word) {
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literal(tag_fixnum(xt_tail_pic_offset));
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literal(word);
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emit(parent_vm->userenv[JIT_WORD_JUMP]);
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}
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void word_call(cell word) {
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emit_with(parent_vm->userenv[JIT_WORD_CALL],word);
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}
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void word_special(cell word) {
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emit_with(parent_vm->userenv[JIT_WORD_SPECIAL],word);
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}
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void emit_subprimitive(cell word_) {
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gc_root<word> word(word_,parent_vm);
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gc_root<array> code_pair(word->subprimitive,parent_vm);
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literals.append(parent_vm->untag<array>(array_nth(code_pair.untagged(),0)));
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emit(array_nth(code_pair.untagged(),1));
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}
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void emit_class_lookup(fixnum index, cell type);
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fixnum get_position() {
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if(computing_offset_p)
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{
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/* If this is still on, emit() didn't clear it,
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so the offset was out of bounds */
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return -1;
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}
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else
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return position;
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}
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void set_position(fixnum position_) {
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if(computing_offset_p)
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position = position_;
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}
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code_block *to_code_block();
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};
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}
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