| // Copyright 2014, ARM Limited |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are met: |
| // |
| // * Redistributions of source code must retain the above copyright notice, |
| // this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above copyright notice, |
| // this list of conditions and the following disclaimer in the documentation |
| // and/or other materials provided with the distribution. |
| // * Neither the name of ARM Limited nor the names of its contributors may be |
| // used to endorse or promote products derived from this software without |
| // specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND |
| // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE |
| // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "examples.h" |
| #include "non-const-visitor.h" |
| |
| #define BUF_SIZE (4096) |
| #define __ masm-> |
| |
| |
| void GenerateNonConstVisitorTestCode(MacroAssembler* masm) { |
| // int64_t foo(int64_t a, int64_t b) |
| // Argument locations: |
| // a -> x0 |
| // b -> x1 |
| __ Sub(x0, x0, x1); |
| // The return value is in x0. |
| __ Ret(); |
| } |
| |
| |
| int64_t RunNonConstVisitorTestGeneratedCode(const Instruction* start_instr) { |
| #ifdef VIXL_INCLUDE_SIMULATOR |
| Decoder simulator_decoder; |
| Simulator simulator(&simulator_decoder); |
| |
| int64_t a = 5; |
| int64_t b = 2; |
| simulator.set_xreg(0, a); |
| simulator.set_xreg(1, b); |
| simulator.RunFrom(start_instr); |
| int64_t res = simulator.xreg(0); |
| printf("foo(%" PRId64", %" PRId64") = %" PRId64"\n", a, b, res); |
| |
| return res; |
| #else |
| // Without the simulator there is nothing to test. |
| USE(start_instr); |
| return 0; |
| #endif |
| } |
| |
| |
| #ifndef TEST_EXAMPLES |
| #ifdef VIXL_INCLUDE_SIMULATOR |
| int main(void) { |
| // Create and initialize the assembler. |
| byte assm_buf[BUF_SIZE]; |
| MacroAssembler masm(assm_buf, BUF_SIZE); |
| |
| // Generate the code. |
| Label code_start, code_end; |
| masm.Bind(&code_start); |
| GenerateNonConstVisitorTestCode(&masm); |
| masm.Bind(&code_end); |
| masm.FinalizeCode(); |
| Instruction* instr_start = masm.GetLabelAddress<Instruction*>(&code_start); |
| Instruction* instr_end = masm.GetLabelAddress<Instruction*>(&code_end); |
| |
| // Run the code a first time. |
| RunNonConstVisitorTestGeneratedCode(instr_start); |
| |
| // Instantiate a decoder, disassembler, and our custom modifying visitor. |
| Decoder decoder; |
| PrintDisassembler disasm(stdout); |
| SwitchAddSubRegisterSources modifying_visitor; |
| |
| // Register visitors in such a way that when visiting instructions, the |
| // decoder will first disassemble the original instruction, modify it, and |
| // then disassemble the modified instruction. |
| decoder.AppendVisitor(&disasm); |
| decoder.AppendVisitor(&modifying_visitor); |
| decoder.AppendVisitor(&disasm); |
| |
| // Iterate through the instructions. |
| Instruction* instr; |
| for (instr = instr_start; instr < instr_end; instr += kInstructionSize) { |
| printf("---\n"); |
| decoder.Decode(instr); |
| } |
| |
| // Run the modified code and observe the different output from before. |
| RunNonConstVisitorTestGeneratedCode(instr_start); |
| |
| return 0; |
| } |
| #else |
| // Without the simulator there is nothing to test. |
| int main(void) { return 0; } |
| #endif // VIXL_INCLUDE_SIMULATOR |
| #endif // TEST_EXAMPLES |
| |
| |
| // This is only used by the testing code. |
| void ModifyNonConstVisitorTestGeneratedCode(Instruction* start, |
| Instruction* end) { |
| Decoder decoder; |
| SwitchAddSubRegisterSources modifying_visitor; |
| decoder.AppendVisitor(&modifying_visitor); |
| |
| Instruction* instr; |
| for (instr = start; instr < end; instr += kInstructionSize) { |
| printf("---\n"); |
| decoder.Decode(instr); |
| } |
| } |