diff options
Diffstat (limited to 'contrib/llvm/lib/Target/Sparc/SparcJITInfo.cpp')
| -rw-r--r-- | contrib/llvm/lib/Target/Sparc/SparcJITInfo.cpp | 229 |
1 files changed, 194 insertions, 35 deletions
diff --git a/contrib/llvm/lib/Target/Sparc/SparcJITInfo.cpp b/contrib/llvm/lib/Target/Sparc/SparcJITInfo.cpp index 6493c7d..959d12f 100644 --- a/contrib/llvm/lib/Target/Sparc/SparcJITInfo.cpp +++ b/contrib/llvm/lib/Target/Sparc/SparcJITInfo.cpp @@ -12,8 +12,9 @@ //===----------------------------------------------------------------------===// #define DEBUG_TYPE "jit" #include "SparcJITInfo.h" +#include "Sparc.h" #include "SparcRelocations.h" - +#include "llvm/ADT/SmallVector.h" #include "llvm/CodeGen/JITCodeEmitter.h" #include "llvm/Support/Memory.h" @@ -27,26 +28,67 @@ extern "C" void SparcCompilationCallback(); extern "C" { #if defined (__sparc__) + +#if defined(__arch64__) +#define FRAME_PTR(X) #X "+2047" +#else +#define FRAME_PTR(X) #X +#endif + asm( ".text\n" "\t.align 4\n" "\t.global SparcCompilationCallback\n" "\t.type SparcCompilationCallback, #function\n" "SparcCompilationCallback:\n" - // Save current register window. - "\tsave %sp, -192, %sp\n" - // stubaddr+4 is in %g1. + // Save current register window and create stack. + // 128 (save area) + 6*8 (for arguments) + 16*8 (for float regfile) = 304 + "\tsave %sp, -304, %sp\n" + // save float regfile to the stack. + "\tstd %f0, [" FRAME_PTR(%fp) "-0]\n" + "\tstd %f2, [" FRAME_PTR(%fp) "-8]\n" + "\tstd %f4, [" FRAME_PTR(%fp) "-16]\n" + "\tstd %f6, [" FRAME_PTR(%fp) "-24]\n" + "\tstd %f8, [" FRAME_PTR(%fp) "-32]\n" + "\tstd %f10, [" FRAME_PTR(%fp) "-40]\n" + "\tstd %f12, [" FRAME_PTR(%fp) "-48]\n" + "\tstd %f14, [" FRAME_PTR(%fp) "-56]\n" + "\tstd %f16, [" FRAME_PTR(%fp) "-64]\n" + "\tstd %f18, [" FRAME_PTR(%fp) "-72]\n" + "\tstd %f20, [" FRAME_PTR(%fp) "-80]\n" + "\tstd %f22, [" FRAME_PTR(%fp) "-88]\n" + "\tstd %f24, [" FRAME_PTR(%fp) "-96]\n" + "\tstd %f26, [" FRAME_PTR(%fp) "-104]\n" + "\tstd %f28, [" FRAME_PTR(%fp) "-112]\n" + "\tstd %f30, [" FRAME_PTR(%fp) "-120]\n" + // stubaddr is in %g1. "\tcall SparcCompilationCallbackC\n" - "\t sub %g1, 4, %o0\n" + "\t mov %g1, %o0\n" + // restore float regfile from the stack. + "\tldd [" FRAME_PTR(%fp) "-0], %f0\n" + "\tldd [" FRAME_PTR(%fp) "-8], %f2\n" + "\tldd [" FRAME_PTR(%fp) "-16], %f4\n" + "\tldd [" FRAME_PTR(%fp) "-24], %f6\n" + "\tldd [" FRAME_PTR(%fp) "-32], %f8\n" + "\tldd [" FRAME_PTR(%fp) "-40], %f10\n" + "\tldd [" FRAME_PTR(%fp) "-48], %f12\n" + "\tldd [" FRAME_PTR(%fp) "-56], %f14\n" + "\tldd [" FRAME_PTR(%fp) "-64], %f16\n" + "\tldd [" FRAME_PTR(%fp) "-72], %f18\n" + "\tldd [" FRAME_PTR(%fp) "-80], %f20\n" + "\tldd [" FRAME_PTR(%fp) "-88], %f22\n" + "\tldd [" FRAME_PTR(%fp) "-96], %f24\n" + "\tldd [" FRAME_PTR(%fp) "-104], %f26\n" + "\tldd [" FRAME_PTR(%fp) "-112], %f28\n" + "\tldd [" FRAME_PTR(%fp) "-120], %f30\n" // restore original register window and // copy %o0 to %g1 - "\t restore %o0, 0, %g1\n" + "\trestore %o0, 0, %g1\n" // call the new stub "\tjmp %g1\n" "\t nop\n" "\t.size SparcCompilationCallback, .-SparcCompilationCallback" ); - #else void SparcCompilationCallback() { llvm_unreachable( @@ -55,75 +97,171 @@ extern "C" { #endif } -#define HI(Val) (((unsigned)(Val)) >> 10) -#define LO(Val) (((unsigned)(Val)) & 0x3FF) #define SETHI_INST(imm, rd) (0x01000000 | ((rd) << 25) | ((imm) & 0x3FFFFF)) #define JMP_INST(rs1, imm, rd) (0x80000000 | ((rd) << 25) | (0x38 << 19) \ | ((rs1) << 14) | (1 << 13) | ((imm) & 0x1FFF)) #define NOP_INST SETHI_INST(0, 0) +#define OR_INST_I(rs1, imm, rd) (0x80000000 | ((rd) << 25) | (0x02 << 19) \ + | ((rs1) << 14) | (1 << 13) | ((imm) & 0x1FFF)) +#define OR_INST_R(rs1, rs2, rd) (0x80000000 | ((rd) << 25) | (0x02 << 19) \ + | ((rs1) << 14) | (0 << 13) | ((rs2) & 0x1F)) +#define RDPC_INST(rd) (0x80000000 | ((rd) << 25) | (0x28 << 19) \ + | (5 << 14)) +#define LDX_INST(rs1, imm, rd) (0xC0000000 | ((rd) << 25) | (0x0B << 19) \ + | ((rs1) << 14) | (1 << 13) | ((imm) & 0x1FFF)) +#define SLLX_INST(rs1, imm, rd) (0x80000000 | ((rd) << 25) | (0x25 << 19) \ + | ((rs1) << 14) | (3 << 12) | ((imm) & 0x3F)) +#define SUB_INST(rs1, imm, rd) (0x80000000 | ((rd) << 25) | (0x04 << 19) \ + | ((rs1) << 14) | (1 << 13) | ((imm) & 0x1FFF)) +#define XOR_INST(rs1, imm, rd) (0x80000000 | ((rd) << 25) | (0x03 << 19) \ + | ((rs1) << 14) | (1 << 13) | ((imm) & 0x1FFF)) +#define BA_INST(tgt) (0x10800000 | ((tgt) & 0x3FFFFF)) + +// Emit instructions to jump to Addr and store the starting address of +// the instructions emitted in the scratch register. +static void emitInstrForIndirectJump(intptr_t Addr, + unsigned scratch, + SmallVectorImpl<uint32_t> &Insts) { + + if (isInt<13>(Addr)) { + // Emit: jmpl %g0+Addr, <scratch> + // nop + Insts.push_back(JMP_INST(0, LO10(Addr), scratch)); + Insts.push_back(NOP_INST); + return; + } + + if (isUInt<32>(Addr)) { + // Emit: sethi %hi(Addr), scratch + // jmpl scratch+%lo(Addr), scratch + // sub scratch, 4, scratch + Insts.push_back(SETHI_INST(HI22(Addr), scratch)); + Insts.push_back(JMP_INST(scratch, LO10(Addr), scratch)); + Insts.push_back(SUB_INST(scratch, 4, scratch)); + return; + } + + if (Addr < 0 && isInt<33>(Addr)) { + // Emit: sethi %hix(Addr), scratch) + // xor scratch, %lox(Addr), scratch + // jmpl scratch+0, scratch + // sub scratch, 8, scratch + Insts.push_back(SETHI_INST(HIX22(Addr), scratch)); + Insts.push_back(XOR_INST(scratch, LOX10(Addr), scratch)); + Insts.push_back(JMP_INST(scratch, 0, scratch)); + Insts.push_back(SUB_INST(scratch, 8, scratch)); + return; + } + + // Emit: rd %pc, scratch + // ldx [scratch+16], scratch + // jmpl scratch+0, scratch + // sub scratch, 8, scratch + // <Addr: 8 byte> + Insts.push_back(RDPC_INST(scratch)); + Insts.push_back(LDX_INST(scratch, 16, scratch)); + Insts.push_back(JMP_INST(scratch, 0, scratch)); + Insts.push_back(SUB_INST(scratch, 8, scratch)); + Insts.push_back((uint32_t)(((int64_t)Addr) >> 32) & 0xffffffff); + Insts.push_back((uint32_t)(Addr & 0xffffffff)); + + // Instruction sequence without rdpc instruction + // 7 instruction and 2 scratch register + // Emit: sethi %hh(Addr), scratch + // or scratch, %hm(Addr), scratch + // sllx scratch, 32, scratch + // sethi %hi(Addr), scratch2 + // or scratch, scratch2, scratch + // jmpl scratch+%lo(Addr), scratch + // sub scratch, 20, scratch + // Insts.push_back(SETHI_INST(HH22(Addr), scratch)); + // Insts.push_back(OR_INST_I(scratch, HM10(Addr), scratch)); + // Insts.push_back(SLLX_INST(scratch, 32, scratch)); + // Insts.push_back(SETHI_INST(HI22(Addr), scratch2)); + // Insts.push_back(OR_INST_R(scratch, scratch2, scratch)); + // Insts.push_back(JMP_INST(scratch, LO10(Addr), scratch)); + // Insts.push_back(SUB_INST(scratch, 20, scratch)); +} extern "C" void *SparcCompilationCallbackC(intptr_t StubAddr) { // Get the address of the compiled code for this function. intptr_t NewVal = (intptr_t) JITCompilerFunction((void*) StubAddr); // Rewrite the function stub so that we don't end up here every time we - // execute the call. We're replacing the first three instructions of the - // stub with code that jumps to the compiled function: - // sethi %hi(NewVal), %g1 - // jmp %g1+%lo(NewVal) - // nop + // execute the call. We're replacing the stub instructions with code + // that jumps to the compiled function: + + SmallVector<uint32_t, 8> Insts; + intptr_t diff = (NewVal - StubAddr) >> 2; + if (isInt<22>(diff)) { + // Use branch instruction to jump + Insts.push_back(BA_INST(diff)); + Insts.push_back(NOP_INST); + } else { + // Otherwise, use indirect jump to the compiled function + emitInstrForIndirectJump(NewVal, 1, Insts); + } - *(intptr_t *)(StubAddr) = SETHI_INST(HI(NewVal), 1); - *(intptr_t *)(StubAddr + 4) = JMP_INST(1, LO(NewVal), 0); - *(intptr_t *)(StubAddr + 8) = NOP_INST; + for (unsigned i = 0, e = Insts.size(); i != e; ++i) + *(uint32_t *)(StubAddr + i*4) = Insts[i]; - sys::Memory::InvalidateInstructionCache((void*) StubAddr, 12); + sys::Memory::InvalidateInstructionCache((void*) StubAddr, Insts.size() * 4); return (void*)StubAddr; } + void SparcJITInfo::replaceMachineCodeForFunction(void *Old, void *New) { assert(0 && "FIXME: Implement SparcJITInfo::replaceMachineCodeForFunction"); } TargetJITInfo::StubLayout SparcJITInfo::getStubLayout() { - // The stub contains 3 4-byte instructions, aligned at 4 bytes. See - // emitFunctionStub for details. - - StubLayout Result = { 3*4, 4 }; + // The stub contains maximum of 4 4-byte instructions and 8 bytes for address, + // aligned at 32 bytes. + // See emitFunctionStub and emitInstrForIndirectJump for details. + StubLayout Result = { 4*4 + 8, 32 }; return Result; } void *SparcJITInfo::emitFunctionStub(const Function *F, void *Fn, JITCodeEmitter &JCE) { - JCE.emitAlignment(4); + JCE.emitAlignment(32); void *Addr = (void*) (JCE.getCurrentPCValue()); - if (!sys::Memory::setRangeWritable(Addr, 12)) - llvm_unreachable("ERROR: Unable to mark stub writable."); + intptr_t CurrentAddr = (intptr_t)Addr; intptr_t EmittedAddr; - if (Fn != (void*)(intptr_t)SparcCompilationCallback) + SmallVector<uint32_t, 8> Insts; + if (Fn != (void*)(intptr_t)SparcCompilationCallback) { EmittedAddr = (intptr_t)Fn; - else + intptr_t diff = (EmittedAddr - CurrentAddr) >> 2; + if (isInt<22>(diff)) { + Insts.push_back(BA_INST(diff)); + Insts.push_back(NOP_INST); + } + } else { EmittedAddr = (intptr_t)SparcCompilationCallback; + } + + if (Insts.size() == 0) + emitInstrForIndirectJump(EmittedAddr, 1, Insts); - // sethi %hi(EmittedAddr), %g1 - // jmp %g1+%lo(EmittedAddr), %g1 - // nop - JCE.emitWordBE(SETHI_INST(HI(EmittedAddr), 1)); - JCE.emitWordBE(JMP_INST(1, LO(EmittedAddr), 1)); - JCE.emitWordBE(NOP_INST); + if (!sys::Memory::setRangeWritable(Addr, 4 * Insts.size())) + llvm_unreachable("ERROR: Unable to mark stub writable."); + + for (unsigned i = 0, e = Insts.size(); i != e; ++i) + JCE.emitWordBE(Insts[i]); - sys::Memory::InvalidateInstructionCache(Addr, 12); - if (!sys::Memory::setRangeExecutable(Addr, 12)) + sys::Memory::InvalidateInstructionCache(Addr, 4 * Insts.size()); + if (!sys::Memory::setRangeExecutable(Addr, 4 * Insts.size())) llvm_unreachable("ERROR: Unable to mark stub executable."); return Addr; } + TargetJITInfo::LazyResolverFn SparcJITInfo::getLazyResolverFunction(JITCompilerFn F) { JITCompilerFunction = F; @@ -159,6 +297,27 @@ void SparcJITInfo::relocate(void *Function, MachineRelocation *MR, case SP::reloc_sparc_pc19: ResultPtr = ((ResultPtr - (intptr_t)RelocPos) >> 2) & 0x7ffff; break; + + case SP::reloc_sparc_h44: + ResultPtr = (ResultPtr >> 22) & 0x3fffff; + break; + + case SP::reloc_sparc_m44: + ResultPtr = (ResultPtr >> 12) & 0x3ff; + break; + + case SP::reloc_sparc_l44: + ResultPtr = (ResultPtr & 0xfff); + break; + + case SP::reloc_sparc_hh: + ResultPtr = (((int64_t)ResultPtr) >> 42) & 0x3fffff; + break; + + case SP::reloc_sparc_hm: + ResultPtr = (((int64_t)ResultPtr) >> 32) & 0x3ff; + break; + } *((unsigned*) RelocPos) |= (unsigned) ResultPtr; } |
