From 7d2093c741f929a65f2ae0de261872cb7dc8cdba Mon Sep 17 00:00:00 2001
From: Pawel Wodnicki <pawel@32bitmicro.com>
Date: Tue, 4 Dec 2012 20:23:05 +0000
Subject: Merging MIPS JIT/MCJIT changeset into 3.2 release branch.

Merging r169183:

RuntimeDyld: Fix up r169178. MSVC doesn't like "or".

Merging r169178:

Runtime dynamic linker for MCJIT should support MIPS BigEndian architecture.
This small change adds support for that. It will make all MCJIT tests pass
in make-check on BigEndian platforms.

Patch by Petar Jovanovic.

Merging r169177:

Classic JIT is still being supported by MIPS, along with MCJIT.
This change adds endian-awareness to MipsJITInfo and emitWordLE in
MipsCodeEmitter has become emitWord now to support both endianness.

Patch by Petar Jovanovic.

Merging r169174:

Functions in MipsCodeEmitter.cpp that expand unaligned loads/stores are dead
code. Removing it.

Patch by Petar Jovanovic.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_32@169296 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp    |   2 +-
 lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp |   3 +-
 lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h  |   2 +-
 lib/Target/Mips/MipsCodeEmitter.cpp                | 116 ++-------------------
 lib/Target/Mips/MipsJITInfo.cpp                    |  15 ++-
 lib/Target/Mips/MipsJITInfo.h                      |   7 +-
 6 files changed, 28 insertions(+), 117 deletions(-)

(limited to 'lib')

diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
index f6dccb106d..a180e36e83 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
@@ -346,7 +346,7 @@ uint8_t *RuntimeDyldImpl::createStubFunction(uint8_t *Addr) {
     uint32_t *StubAddr = (uint32_t*)Addr;
     *StubAddr = 0xe51ff004; // ldr pc,<label>
     return (uint8_t*)++StubAddr;
-  } else if (Arch == Triple::mipsel) {
+  } else if (Arch == Triple::mipsel || Arch == Triple::mips) {
     uint32_t *StubAddr = (uint32_t*)Addr;
     // 0:   3c190000        lui     t9,%hi(addr).
     // 4:   27390000        addiu   t9,t9,%lo(addr).
diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
index 1ebcaf7ba8..f7015cdf6b 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
@@ -676,7 +676,8 @@ void RuntimeDyldELF::processRelocationRef(const ObjRelocationInfo &Rel,
                         RelType, 0);
       Section.StubOffset += getMaxStubSize();
     }
-  } else if (Arch == Triple::mipsel && RelType == ELF::R_MIPS_26) {
+  } else if ((Arch == Triple::mipsel || Arch == Triple::mips) &&
+             RelType == ELF::R_MIPS_26) {
     // This is an Mips branch relocation, need to use a stub function.
     DEBUG(dbgs() << "\t\tThis is a Mips branch relocation.");
     SectionEntry &Section = Sections[Rel.SectionID];
diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
index 829fd6c4c9..a292ee1a84 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
@@ -168,7 +168,7 @@ protected:
   inline unsigned getMaxStubSize() {
     if (Arch == Triple::arm || Arch == Triple::thumb)
       return 8; // 32-bit instruction and 32-bit address
-    else if (Arch == Triple::mipsel)
+    else if (Arch == Triple::mipsel || Arch == Triple::mips)
       return 16;
     else if (Arch == Triple::ppc64)
       return 44;
diff --git a/lib/Target/Mips/MipsCodeEmitter.cpp b/lib/Target/Mips/MipsCodeEmitter.cpp
index 4bfccd8fdd..05090b84de 100644
--- a/lib/Target/Mips/MipsCodeEmitter.cpp
+++ b/lib/Target/Mips/MipsCodeEmitter.cpp
@@ -85,7 +85,7 @@ class MipsCodeEmitter : public MachineFunctionPass {
 
   private:
 
-    void emitWordLE(unsigned Word);
+    void emitWord(unsigned Word);
 
     /// Routines that handle operands which add machine relocations which are
     /// fixed up by the relocation stage.
@@ -112,12 +112,6 @@ class MipsCodeEmitter : public MachineFunctionPass {
     unsigned getSizeExtEncoding(const MachineInstr &MI, unsigned OpNo) const;
     unsigned getSizeInsEncoding(const MachineInstr &MI, unsigned OpNo) const;
 
-    int emitULW(const MachineInstr &MI);
-    int emitUSW(const MachineInstr &MI);
-    int emitULH(const MachineInstr &MI);
-    int emitULHu(const MachineInstr &MI);
-    int emitUSH(const MachineInstr &MI);
-
     void emitGlobalAddressUnaligned(const GlobalValue *GV, unsigned Reloc,
                                     int Offset) const;
   };
@@ -133,7 +127,7 @@ bool MipsCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
   MCPEs = &MF.getConstantPool()->getConstants();
   MJTEs = 0;
   if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables();
-  JTI->Initialize(MF, IsPIC);
+  JTI->Initialize(MF, IsPIC, Subtarget->isLittle());
   MCE.setModuleInfo(&getAnalysis<MachineModuleInfo> ());
 
   do {
@@ -271,103 +265,6 @@ void MipsCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB,
                                              Reloc, BB));
 }
 
-int MipsCodeEmitter::emitUSW(const MachineInstr &MI) {
-  unsigned src = getMachineOpValue(MI, MI.getOperand(0));
-  unsigned base = getMachineOpValue(MI, MI.getOperand(1));
-  unsigned offset = getMachineOpValue(MI, MI.getOperand(2));
-  // swr src, offset(base)
-  // swl src, offset+3(base)
-  MCE.emitWordLE(
-    (0x2e << 26) | (base << 21) | (src << 16) | (offset & 0xffff));
-  MCE.emitWordLE(
-    (0x2a << 26) | (base << 21) | (src << 16) | ((offset+3) & 0xffff));
-  return 2;
-}
-
-int MipsCodeEmitter::emitULW(const MachineInstr &MI) {
-  unsigned dst = getMachineOpValue(MI, MI.getOperand(0));
-  unsigned base = getMachineOpValue(MI, MI.getOperand(1));
-  unsigned offset = getMachineOpValue(MI, MI.getOperand(2));
-  unsigned at = 1;
-  if (dst != base) {
-    // lwr dst, offset(base)
-    // lwl dst, offset+3(base)
-    MCE.emitWordLE(
-      (0x26 << 26) | (base << 21) | (dst << 16) | (offset & 0xffff));
-    MCE.emitWordLE(
-      (0x22 << 26) | (base << 21) | (dst << 16) | ((offset+3) & 0xffff));
-    return 2;
-  } else {
-    // lwr at, offset(base)
-    // lwl at, offset+3(base)
-    // addu dst, at, $zero
-    MCE.emitWordLE(
-      (0x26 << 26) | (base << 21) | (at << 16) | (offset & 0xffff));
-    MCE.emitWordLE(
-      (0x22 << 26) | (base << 21) | (at << 16) | ((offset+3) & 0xffff));
-    MCE.emitWordLE(
-      (0x0 << 26) | (at << 21) | (0x0 << 16) | (dst << 11) | (0x0 << 6) | 0x21);
-    return 3;
-  }
-}
-
-int MipsCodeEmitter::emitUSH(const MachineInstr &MI) {
-  unsigned src = getMachineOpValue(MI, MI.getOperand(0));
-  unsigned base = getMachineOpValue(MI, MI.getOperand(1));
-  unsigned offset = getMachineOpValue(MI, MI.getOperand(2));
-  unsigned at = 1;
-  // sb src, offset(base)
-  // srl at,src,8
-  // sb at, offset+1(base)
-  MCE.emitWordLE(
-    (0x28 << 26) | (base << 21) | (src << 16) | (offset & 0xffff));
-  MCE.emitWordLE(
-    (0x0 << 26) | (0x0 << 21) | (src << 16) | (at << 11) | (0x8 << 6) | 0x2);
-  MCE.emitWordLE(
-    (0x28 << 26) | (base << 21) | (at << 16) | ((offset+1) & 0xffff));
-  return 3;
-}
-
-int MipsCodeEmitter::emitULH(const MachineInstr &MI) {
-  unsigned dst = getMachineOpValue(MI, MI.getOperand(0));
-  unsigned base = getMachineOpValue(MI, MI.getOperand(1));
-  unsigned offset = getMachineOpValue(MI, MI.getOperand(2));
-  unsigned at = 1;
-  // lbu at, offset(base)
-  // lb dst, offset+1(base)
-  // sll dst,dst,8
-  // or dst,dst,at
-  MCE.emitWordLE(
-    (0x24 << 26) | (base << 21) | (at << 16) | (offset & 0xffff));
-  MCE.emitWordLE(
-    (0x20 << 26) | (base << 21) | (dst << 16) | ((offset+1) & 0xffff));
-  MCE.emitWordLE(
-    (0x0 << 26) | (0x0 << 21) | (dst << 16) | (dst << 11) | (0x8 << 6) | 0x0);
-  MCE.emitWordLE(
-    (0x0 << 26) | (dst << 21) | (at << 16) | (dst << 11) | (0x0 << 6) | 0x25);
-  return 4;
-}
-
-int MipsCodeEmitter::emitULHu(const MachineInstr &MI) {
-  unsigned dst = getMachineOpValue(MI, MI.getOperand(0));
-  unsigned base = getMachineOpValue(MI, MI.getOperand(1));
-  unsigned offset = getMachineOpValue(MI, MI.getOperand(2));
-  unsigned at = 1;
-  // lbu at, offset(base)
-  // lbu dst, offset+1(base)
-  // sll dst,dst,8
-  // or dst,dst,at
-  MCE.emitWordLE(
-    (0x24 << 26) | (base << 21) | (at << 16) | (offset & 0xffff));
-  MCE.emitWordLE(
-    (0x24 << 26) | (base << 21) | (dst << 16) | ((offset+1) & 0xffff));
-  MCE.emitWordLE(
-    (0x0 << 26) | (0x0 << 21) | (dst << 16) | (dst << 11) | (0x8 << 6) | 0x0);
-  MCE.emitWordLE(
-    (0x0 << 26) | (dst << 21) | (at << 16) | (dst << 11) | (0x0 << 6) | 0x25);
-  return 4;
-}
-
 void MipsCodeEmitter::emitInstruction(const MachineInstr &MI) {
   DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI);
 
@@ -377,16 +274,19 @@ void MipsCodeEmitter::emitInstruction(const MachineInstr &MI) {
   if ((MI.getDesc().TSFlags & MipsII::FormMask) == MipsII::Pseudo)
     return;
 
-  emitWordLE(getBinaryCodeForInstr(MI));
+  emitWord(getBinaryCodeForInstr(MI));
   ++NumEmitted;  // Keep track of the # of mi's emitted
 
   MCE.processDebugLoc(MI.getDebugLoc(), false);
 }
 
-void MipsCodeEmitter::emitWordLE(unsigned Word) {
+void MipsCodeEmitter::emitWord(unsigned Word) {
   DEBUG(errs() << "  0x";
         errs().write_hex(Word) << "\n");
-  MCE.emitWordLE(Word);
+  if (Subtarget->isLittle())
+    MCE.emitWordLE(Word);
+  else
+    MCE.emitWordBE(Word);
 }
 
 /// createMipsJITCodeEmitterPass - Return a pass that emits the collected Mips
diff --git a/lib/Target/Mips/MipsJITInfo.cpp b/lib/Target/Mips/MipsJITInfo.cpp
index 052046a8a4..da1119df8f 100644
--- a/lib/Target/Mips/MipsJITInfo.cpp
+++ b/lib/Target/Mips/MipsJITInfo.cpp
@@ -222,10 +222,17 @@ void *MipsJITInfo::emitFunctionStub(const Function *F, void *Fn,
   // addiu t9, t9, %lo(EmittedAddr)
   // jalr t8, t9
   // nop
-  JCE.emitWordLE(0xf << 26 | 25 << 16 | Hi);
-  JCE.emitWordLE(9 << 26 | 25 << 21 | 25 << 16 | Lo);
-  JCE.emitWordLE(25 << 21 | 24 << 11 | 9);
-  JCE.emitWordLE(0);
+  if (IsLittleEndian) {
+    JCE.emitWordLE(0xf << 26 | 25 << 16 | Hi);
+    JCE.emitWordLE(9 << 26 | 25 << 21 | 25 << 16 | Lo);
+    JCE.emitWordLE(25 << 21 | 24 << 11 | 9);
+    JCE.emitWordLE(0);
+  } else {
+    JCE.emitWordBE(0xf << 26 | 25 << 16 | Hi);
+    JCE.emitWordBE(9 << 26 | 25 << 21 | 25 << 16 | Lo);
+    JCE.emitWordBE(25 << 21 | 24 << 11 | 9);
+    JCE.emitWordBE(0);
+  }
 
   sys::Memory::InvalidateInstructionCache(Addr, 16);
   if (!sys::Memory::setRangeExecutable(Addr, 16))
diff --git a/lib/Target/Mips/MipsJITInfo.h b/lib/Target/Mips/MipsJITInfo.h
index 637a318660..ecda3101a0 100644
--- a/lib/Target/Mips/MipsJITInfo.h
+++ b/lib/Target/Mips/MipsJITInfo.h
@@ -26,10 +26,11 @@ class MipsTargetMachine;
 class MipsJITInfo : public TargetJITInfo {
 
   bool IsPIC;
+  bool IsLittleEndian;
 
   public:
     explicit MipsJITInfo() :
-      IsPIC(false) {}
+      IsPIC(false), IsLittleEndian(true) {}
 
     /// replaceMachineCodeForFunction - Make it so that calling the function
     /// whose machine code is at OLD turns into a call to NEW, perhaps by
@@ -58,8 +59,10 @@ class MipsJITInfo : public TargetJITInfo {
                           unsigned NumRelocs, unsigned char *GOTBase);
 
     /// Initialize - Initialize internal stage for the function being JITted.
-    void Initialize(const MachineFunction &MF, bool isPIC) {
+    void Initialize(const MachineFunction &MF, bool isPIC,
+                    bool isLittleEndian) {
       IsPIC = isPIC;
+      IsLittleEndian = isLittleEndian;
     }
 
 };
-- 
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