mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-31 08:16:47 +00:00
d1d0b61b48
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229494 91177308-0d34-0410-b5e6-96231b3b80d8
127 lines
3.9 KiB
C++
127 lines
3.9 KiB
C++
#include "llvm/ADT/Triple.h"
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#include "llvm/ExecutionEngine/Orc/OrcTargetSupport.h"
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#include <array>
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using namespace llvm;
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namespace {
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std::array<const char *, 12> X86GPRsToSave = {{
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"rbp", "rbx", "r12", "r13", "r14", "r15", // Callee saved.
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"rdi", "rsi", "rdx", "rcx", "r8", "r9", // Int args.
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}};
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std::array<const char *, 8> X86XMMsToSave = {{
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"xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7" // FP args
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}};
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template <typename OStream> unsigned saveX86Regs(OStream &OS) {
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for (const auto &GPR : X86GPRsToSave)
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OS << " pushq %" << GPR << "\n";
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OS << " subq $" << (16 * X86XMMsToSave.size()) << ", %rsp\n";
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for (unsigned i = 0; i < X86XMMsToSave.size(); ++i)
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OS << " movdqu %" << X86XMMsToSave[i] << ", "
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<< (16 * (X86XMMsToSave.size() - i - 1)) << "(%rsp)\n";
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return (8 * X86GPRsToSave.size()) + (16 * X86XMMsToSave.size());
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}
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template <typename OStream> void restoreX86Regs(OStream &OS) {
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for (unsigned i = 0; i < X86XMMsToSave.size(); ++i)
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OS << " movdqu " << (16 * i) << "(%rsp), %"
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<< X86XMMsToSave[(X86XMMsToSave.size() - i - 1)] << "\n";
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OS << " addq $" << (16 * X86XMMsToSave.size()) << ", %rsp\n";
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for (unsigned i = 0; i < X86GPRsToSave.size(); ++i)
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OS << " popq %" << X86GPRsToSave[X86GPRsToSave.size() - i - 1] << "\n";
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}
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template <typename TargetT>
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uint64_t executeCompileCallback(JITCompileCallbackManagerBase<TargetT> *JCBM,
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TargetAddress CallbackID) {
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return JCBM->executeCompileCallback(CallbackID);
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}
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}
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namespace llvm {
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const char* OrcX86_64::ResolverBlockName = "orc_resolver_block";
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void OrcX86_64::insertResolverBlock(
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Module &M, JITCompileCallbackManagerBase<OrcX86_64> &JCBM) {
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auto CallbackPtr = executeCompileCallback<OrcX86_64>;
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uint64_t CallbackAddr =
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static_cast<uint64_t>(reinterpret_cast<uintptr_t>(CallbackPtr));
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std::ostringstream AsmStream;
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Triple TT(M.getTargetTriple());
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if (TT.getOS() == Triple::Darwin)
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AsmStream << ".section __TEXT,__text,regular,pure_instructions\n"
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<< ".align 4, 0x90\n";
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else
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AsmStream << ".text\n"
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<< ".align 16, 0x90\n";
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AsmStream << "jit_callback_manager_addr:\n"
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<< " .quad " << &JCBM << "\n"
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<< ResolverBlockName << ":\n";
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uint64_t ReturnAddrOffset = saveX86Regs(AsmStream);
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// Compute index, load object address, and call JIT.
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AsmStream << " leaq jit_callback_manager_addr(%rip), %rdi\n"
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<< " movq (%rdi), %rdi\n"
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<< " movq " << ReturnAddrOffset << "(%rsp), %rsi\n"
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<< " movabsq $" << CallbackAddr << ", %rax\n"
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<< " callq *%rax\n"
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<< " movq %rax, " << ReturnAddrOffset << "(%rsp)\n";
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restoreX86Regs(AsmStream);
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AsmStream << " retq\n";
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M.appendModuleInlineAsm(AsmStream.str());
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}
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OrcX86_64::LabelNameFtor
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OrcX86_64::insertCompileCallbackTrampolines(Module &M,
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TargetAddress ResolverBlockAddr,
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unsigned NumCalls,
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unsigned StartIndex) {
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const char *ResolverBlockPtrName = "Lorc_resolve_block_addr";
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std::ostringstream AsmStream;
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Triple TT(M.getTargetTriple());
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if (TT.getOS() == Triple::Darwin)
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AsmStream << ".section __TEXT,__text,regular,pure_instructions\n"
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<< ".align 4, 0x90\n";
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else
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AsmStream << ".text\n"
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<< ".align 16, 0x90\n";
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AsmStream << ResolverBlockPtrName << ":\n"
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<< " .quad " << ResolverBlockAddr << "\n";
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auto GetLabelName =
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[=](unsigned I) {
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std::ostringstream LabelStream;
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LabelStream << "orc_jcc_" << (StartIndex + I);
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return LabelStream.str();
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};
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for (unsigned I = 0; I < NumCalls; ++I)
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AsmStream << GetLabelName(I) << ":\n"
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<< " callq *" << ResolverBlockPtrName << "(%rip)\n";
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M.appendModuleInlineAsm(AsmStream.str());
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return GetLabelName;
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}
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}
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