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22 lines
915 B
22 lines
915 B
#include <vm_lifters.hpp>
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// https://lists.llvm.org/pipermail/llvm-dev/2014-July/074685.html
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// credit to James Courtier-Dutton for asking this question in 2014...
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namespace vm
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{
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lifters_t::lifter_callback_t lifters_t::imulq =
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[ & ]( vm::devirt_t *rtn, const vm::instrs::code_block_t &vm_code_block, const vm::instrs::virt_instr_t &vinstr,
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llvm::IRBuilder<> *ir_builder ) {
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auto t1 = rtn->pop( 8 );
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auto t2 = rtn->pop( 8 );
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auto t3 = ir_builder->CreateMul( t1, t2 );
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auto t4 = ir_builder->CreateAShr( t3, llvm::APInt( 64, 32 ) );
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auto t5 = ir_builder->CreateAnd( t3, 0xFFFFFFFF00000000 );
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rtn->push( 8, t4 );
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rtn->push( 8, t5 );
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// TODO: compute flags for IMULQ
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auto &vmp_rtn = rtn->vmp_rtns.back();
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rtn->push( 8, rtn->load_value( 8, vmp_rtn->flags ) );
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};
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} |