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20 lines
983 B
20 lines
983 B
3 years ago
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#include <vm_lifters.hpp>
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namespace vmp2::lifters
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{
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lifter_callback_t pushvsp = [ & ]( vm::vmp_rtn_t *rtn, const vm::instrs::code_block_t &vm_code_block,
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const vm::instrs::virt_instr_t &vinstr, llvm::IRBuilder<> *ir_builder ) {
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// Load the current stack index into a temporary variable
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auto current_stack_index =
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ir_builder->CreateLoad( llvm::IntegerType::get( *rtn->llvm_ctx, 64 ), rtn->stack_ptr, false );
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// Get a pointer to the top byte of the stack
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llvm::Value *i64_zero = llvm::ConstantInt::get( *rtn->llvm_ctx, llvm::APInt( 64, 0 ) );
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llvm::Value *indices[ 2 ] = { i64_zero, current_stack_index };
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auto stack_ptr =
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ir_builder->CreateInBoundsGEP( rtn->virtual_stack, llvm::ArrayRef< llvm::Value * >( indices, 2 ) );
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auto stack_ptr_val = ir_builder->CreatePtrToInt( stack_ptr, ir_builder->getInt64Ty() );
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rtn->push( 8, stack_ptr_val );
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};
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}
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