| // 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" |
| |
| #define BUF_SIZE (4096) |
| #define __ masm-> |
| |
| void GenerateSwap4(MacroAssembler* masm) { |
| // VIXL's macro assembler provides some functions to manipulate the stack. |
| // This example shows some of these functions. |
| __ Claim(16); |
| __ Poke(x0, 0); |
| __ Poke(x1, 8); |
| __ Push(x3, x2); |
| |
| __ Pop(x1, x0); |
| __ Peek(x3, 0); |
| __ Peek(x2, 8); |
| __ Drop(16); |
| |
| __ Ret(); |
| } |
| |
| |
| #ifndef TEST_EXAMPLES |
| #ifdef VIXL_INCLUDE_SIMULATOR |
| int main(void) { |
| // Create and initialize the assembler and the simulator. |
| byte assm_buf[BUF_SIZE]; |
| MacroAssembler masm(assm_buf, BUF_SIZE); |
| Decoder decoder; |
| Simulator simulator(&decoder); |
| |
| // Generate the code for the example function. |
| Label swap4; |
| masm.Bind(&swap4); |
| GenerateSwap4(&masm); |
| masm.FinalizeCode(); |
| |
| // Run the example function. |
| simulator.set_xreg(0, 0x1111111111111111); |
| simulator.set_xreg(1, 0x2222222222222222); |
| simulator.set_xreg(2, 0x3333333333333333); |
| simulator.set_xreg(3, 0x4444444444444444); |
| |
| // clang-format off |
| printf("Before swap4:\n" |
| "x0 = 0x%" PRIx64 "\n" |
| "x1 = 0x%" PRIx64 "\n" |
| "x2 = 0x%" PRIx64 "\n" |
| "x3 = 0x%" PRIx64 "\n", |
| simulator.xreg(0), simulator.xreg(1), |
| simulator.xreg(2), simulator.xreg(3)); |
| // clang-format on |
| |
| simulator.RunFrom(masm.GetLabelAddress<Instruction*>(&swap4)); |
| |
| // clang-format off |
| printf("After swap4:\n" |
| "x0 = 0x%" PRIx64 "\n" |
| "x1 = 0x%" PRIx64 "\n" |
| "x2 = 0x%" PRIx64 "\n" |
| "x3 = 0x%" PRIx64 "\n", |
| simulator.xreg(0), simulator.xreg(1), |
| simulator.xreg(2), simulator.xreg(3)); |
| // clang-format on |
| |
| return 0; |
| } |
| #else |
| // Without the simulator there is nothing to test. |
| int main(void) { return 0; } |
| #endif // VIXL_INCLUDE_SIMULATOR |
| #endif // TEST_EXAMPLES |