mirror of https://github.com/ZDoom/raze-gles.git
338 lines
10 KiB
C++
338 lines
10 KiB
C++
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#include "jit.h"
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#include "types.h"
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#include "stats.h"
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// To do: get cmake to define these..
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#define ASMJIT_BUILD_EMBED
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#define ASMJIT_STATIC
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#include <asmjit/asmjit.h>
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#include <asmjit/x86.h>
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#include <functional>
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#include <vector>
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extern cycle_t VMCycles[10];
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extern int VMCalls[10];
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#define A (pc[0].a)
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#define B (pc[0].b)
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#define C (pc[0].c)
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#define Cs (pc[0].cs)
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#define BC (pc[0].i16u)
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#define BCs (pc[0].i16)
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#define ABCs (pc[0].i24)
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#define JMPOFS(x) ((x)->i24)
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struct JitLineInfo
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{
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ptrdiff_t InstructionIndex = 0;
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int32_t LineNumber = -1;
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asmjit::Label Label;
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};
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class JitCompiler
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{
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public:
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JitCompiler(asmjit::CodeHolder *code, VMScriptFunction *sfunc) : cc(code), sfunc(sfunc) { }
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asmjit::CCFunc *Codegen();
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VMScriptFunction *GetScriptFunction() { return sfunc; }
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TArray<JitLineInfo> LineInfo;
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private:
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// Declare EmitXX functions for the opcodes:
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#define xx(op, name, mode, alt, kreg, ktype) void Emit##op();
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#include "vmops.h"
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#undef xx
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asmjit::FuncSignature CreateFuncSignature();
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void Setup();
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void CreateRegisters();
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void IncrementVMCalls();
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void SetupFrame();
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void SetupSimpleFrame();
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void SetupFullVMFrame();
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void BindLabels();
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void EmitOpcode();
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void EmitPopFrame();
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void EmitNativeCall(VMNativeFunction *target);
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void EmitVMCall(asmjit::X86Gp ptr, VMFunction *target);
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void EmitVtbl(const VMOP *op);
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int StoreCallParams();
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void LoadInOuts();
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void LoadReturns(const VMOP *retval, int numret);
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void FillReturns(const VMOP *retval, int numret);
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void LoadCallResult(int type, int regnum, bool addrof);
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template <typename Func>
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void EmitComparisonOpcode(Func jmpFunc)
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{
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using namespace asmjit;
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int i = (int)(ptrdiff_t)(pc - sfunc->Code);
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auto successLabel = cc.newLabel();
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auto failLabel = GetLabel(i + 2 + JMPOFS(pc + 1));
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jmpFunc(static_cast<bool>(A & CMP_CHECK), failLabel, successLabel);
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cc.bind(successLabel);
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pc++; // This instruction uses two instruction slots - skip the next one
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}
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template<int N>
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void EmitVectorComparison(bool check, asmjit::Label& fail, asmjit::Label& success)
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{
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bool approx = static_cast<bool>(A & CMP_APPROX);
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if (!approx)
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{
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for (int i = 0; i < N; i++)
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{
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cc.ucomisd(regF[B + i], regF[C + i]);
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if (check)
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{
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cc.jp(success);
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if (i == (N - 1))
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{
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cc.je(fail);
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}
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else
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{
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cc.jne(success);
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}
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}
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else
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{
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cc.jp(fail);
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cc.jne(fail);
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}
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}
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}
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else
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{
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auto tmp = newTempXmmSd();
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const int64_t absMaskInt = 0x7FFFFFFFFFFFFFFF;
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auto absMask = cc.newDoubleConst(asmjit::kConstScopeLocal, reinterpret_cast<const double&>(absMaskInt));
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auto absMaskXmm = newTempXmmPd();
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auto epsilon = cc.newDoubleConst(asmjit::kConstScopeLocal, VM_EPSILON);
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auto epsilonXmm = newTempXmmSd();
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for (int i = 0; i < N; i++)
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{
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cc.movsd(tmp, regF[B + i]);
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cc.subsd(tmp, regF[C + i]);
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cc.movsd(absMaskXmm, absMask);
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cc.andpd(tmp, absMaskXmm);
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cc.movsd(epsilonXmm, epsilon);
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cc.ucomisd(epsilonXmm, tmp);
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if (check)
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{
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cc.jp(success);
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if (i == (N - 1))
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{
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cc.ja(fail);
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}
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else
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{
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cc.jna(success);
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}
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}
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else
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{
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cc.jp(fail);
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cc.jna(fail);
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}
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}
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}
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}
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static uint64_t ToMemAddress(const void *d)
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{
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return (uint64_t)(ptrdiff_t)d;
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}
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void CallSqrt(const asmjit::X86Xmm &a, const asmjit::X86Xmm &b);
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static void CallAssignString(FString* to, FString* from) {
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*to = *from;
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}
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template<typename RetType, typename P1>
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asmjit::CCFuncCall *CreateCall(RetType(*func)(P1 p1)) { return cc.call(asmjit::imm_ptr(reinterpret_cast<void*>(static_cast<RetType(*)(P1)>(func))), asmjit::FuncSignature1<RetType, P1>()); }
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template<typename RetType, typename P1, typename P2>
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asmjit::CCFuncCall *CreateCall(RetType(*func)(P1 p1, P2 p2)) { return cc.call(asmjit::imm_ptr(reinterpret_cast<void*>(static_cast<RetType(*)(P1, P2)>(func))), asmjit::FuncSignature2<RetType, P1, P2>()); }
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template<typename RetType, typename P1, typename P2, typename P3>
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asmjit::CCFuncCall *CreateCall(RetType(*func)(P1 p1, P2 p2, P3 p3)) { return cc.call(asmjit::imm_ptr(reinterpret_cast<void*>(static_cast<RetType(*)(P1, P2, P3)>(func))), asmjit::FuncSignature3<RetType, P1, P2, P3>()); }
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template<typename RetType, typename P1, typename P2, typename P3, typename P4>
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asmjit::CCFuncCall *CreateCall(RetType(*func)(P1 p1, P2 p2, P3 p3, P4 p4)) { return cc.call(asmjit::imm_ptr(reinterpret_cast<void*>(static_cast<RetType(*)(P1, P2, P3, P4)>(func))), asmjit::FuncSignature4<RetType, P1, P2, P3, P4>()); }
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template<typename RetType, typename P1, typename P2, typename P3, typename P4, typename P5>
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asmjit::CCFuncCall *CreateCall(RetType(*func)(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5)) { return cc.call(asmjit::imm_ptr(reinterpret_cast<void*>(static_cast<RetType(*)(P1, P2, P3, P4, P5)>(func))), asmjit::FuncSignature5<RetType, P1, P2, P3, P4, P5>()); }
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template<typename RetType, typename P1, typename P2, typename P3, typename P4, typename P5, typename P6>
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asmjit::CCFuncCall *CreateCall(RetType(*func)(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6)) { return cc.call(asmjit::imm_ptr(reinterpret_cast<void*>(static_cast<RetType(*)(P1, P2, P3, P4, P5, P6)>(func))), asmjit::FuncSignature6<RetType, P1, P2, P3, P4, P5, P6>()); }
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template<typename RetType, typename P1, typename P2, typename P3, typename P4, typename P5, typename P6, typename P7>
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asmjit::CCFuncCall *CreateCall(RetType(*func)(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6, P7 p7)) { return cc.call(asmjit::imm_ptr(reinterpret_cast<void*>(static_cast<RetType(*)(P1, P2, P3, P4, P5, P6, P7)>(func))), asmjit::FuncSignature7<RetType, P1, P2, P3, P4, P5, P6, P7>()); }
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FString regname;
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size_t tmpPosInt32, tmpPosInt64, tmpPosIntPtr, tmpPosXmmSd, tmpPosXmmSs, tmpPosXmmPd, resultPosInt32, resultPosIntPtr, resultPosXmmSd;
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std::vector<asmjit::X86Gp> regTmpInt32, regTmpInt64, regTmpIntPtr, regResultInt32, regResultIntPtr;
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std::vector<asmjit::X86Xmm> regTmpXmmSd, regTmpXmmSs, regTmpXmmPd, regResultXmmSd;
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void ResetTemp()
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{
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tmpPosInt32 = 0;
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tmpPosInt64 = 0;
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tmpPosIntPtr = 0;
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tmpPosXmmSd = 0;
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tmpPosXmmSs = 0;
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tmpPosXmmPd = 0;
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resultPosInt32 = 0;
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resultPosIntPtr = 0;
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resultPosXmmSd = 0;
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}
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template<typename T, typename NewFunc>
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T newTempRegister(std::vector<T> &tmpVector, size_t &tmpPos, const char *name, NewFunc newCallback)
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{
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if (tmpPos == tmpVector.size())
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{
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regname.Format("%s%d", name, (int)tmpVector.size());
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tmpVector.push_back(newCallback(regname.GetChars()));
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}
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return tmpVector[tmpPos++];
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}
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asmjit::X86Gp newTempInt32() { return newTempRegister(regTmpInt32, tmpPosInt32, "tmpDword", [&](const char *name) { return cc.newInt32(name); }); }
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asmjit::X86Gp newTempInt64() { return newTempRegister(regTmpInt64, tmpPosInt64, "tmpQword", [&](const char *name) { return cc.newInt64(name); }); }
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asmjit::X86Gp newTempIntPtr() { return newTempRegister(regTmpIntPtr, tmpPosIntPtr, "tmpPtr", [&](const char *name) { return cc.newIntPtr(name); }); }
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asmjit::X86Xmm newTempXmmSd() { return newTempRegister(regTmpXmmSd, tmpPosXmmSd, "tmpXmmSd", [&](const char *name) { return cc.newXmmSd(name); }); }
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asmjit::X86Xmm newTempXmmSs() { return newTempRegister(regTmpXmmSs, tmpPosXmmSs, "tmpXmmSs", [&](const char *name) { return cc.newXmmSs(name); }); }
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asmjit::X86Xmm newTempXmmPd() { return newTempRegister(regTmpXmmPd, tmpPosXmmPd, "tmpXmmPd", [&](const char *name) { return cc.newXmmPd(name); }); }
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asmjit::X86Gp newResultInt32() { return newTempRegister(regResultInt32, resultPosInt32, "resultDword", [&](const char *name) { return cc.newInt32(name); }); }
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asmjit::X86Gp newResultIntPtr() { return newTempRegister(regResultIntPtr, resultPosIntPtr, "resultPtr", [&](const char *name) { return cc.newIntPtr(name); }); }
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asmjit::X86Xmm newResultXmmSd() { return newTempRegister(regResultXmmSd, resultPosXmmSd, "resultXmmSd", [&](const char *name) { return cc.newXmmSd(name); }); }
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void EmitReadBarrier();
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void EmitNullPointerThrow(int index, EVMAbortException reason);
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void EmitThrowException(EVMAbortException reason);
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asmjit::Label EmitThrowExceptionLabel(EVMAbortException reason);
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static void ThrowArrayOutOfBounds(int index, int size);
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static void ThrowException(int reason);
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asmjit::X86Gp CheckRegD(int r0, int r1);
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asmjit::X86Xmm CheckRegF(int r0, int r1);
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asmjit::X86Xmm CheckRegF(int r0, int r1, int r2);
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asmjit::X86Xmm CheckRegF(int r0, int r1, int r2, int r3);
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asmjit::X86Gp CheckRegS(int r0, int r1);
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asmjit::X86Gp CheckRegA(int r0, int r1);
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asmjit::X86Compiler cc;
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VMScriptFunction *sfunc;
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asmjit::CCFunc *func = nullptr;
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asmjit::X86Gp args;
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asmjit::X86Gp numargs;
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asmjit::X86Gp ret;
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asmjit::X86Gp numret;
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asmjit::X86Gp stack;
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int offsetParams;
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int offsetF;
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int offsetS;
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int offsetA;
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int offsetD;
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int offsetExtra;
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TArray<const VMOP *> ParamOpcodes;
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void CheckVMFrame();
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asmjit::X86Gp GetCallReturns();
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bool vmframeAllocated = false;
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asmjit::CBNode *vmframeCursor = nullptr;
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asmjit::X86Gp vmframe;
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bool callReturnsAllocated = false;
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asmjit::CBNode *callReturnsCursor = nullptr;
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asmjit::X86Gp callReturns;
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const int *konstd;
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const double *konstf;
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const FString *konsts;
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const FVoidObj *konsta;
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TArray<asmjit::X86Gp> regD;
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TArray<asmjit::X86Xmm> regF;
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TArray<asmjit::X86Gp> regA;
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TArray<asmjit::X86Gp> regS;
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struct OpcodeLabel
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{
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asmjit::CBNode *cursor = nullptr;
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asmjit::Label label;
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bool inUse = false;
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};
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asmjit::Label GetLabel(size_t pos)
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{
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auto &label = labels[pos];
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if (!label.inUse)
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{
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label.label = cc.newLabel();
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label.inUse = true;
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}
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return label.label;
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}
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TArray<OpcodeLabel> labels;
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const VMOP *pc;
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VM_UBYTE op;
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};
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class AsmJitException : public std::exception
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{
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public:
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AsmJitException(asmjit::Error error, const char *message) noexcept : error(error), message(message)
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{
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}
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const char* what() const noexcept override
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{
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return message.GetChars();
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}
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asmjit::Error error;
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FString message;
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};
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class ThrowingErrorHandler : public asmjit::ErrorHandler
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{
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public:
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bool handleError(asmjit::Error err, const char *message, asmjit::CodeEmitter *origin) override
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{
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throw AsmJitException(err, message);
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}
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};
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void *AddJitFunction(asmjit::CodeHolder* code, JitCompiler *compiler);
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asmjit::CodeInfo GetHostCodeInfo();
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