Add support for the PPC isel instruction.

[oota-llvm.git] / lib / Target / PowerPC / InstPrinter / PPCInstPrinter.cpp

diff --git a/lib/Target/PowerPC/InstPrinter/PPCInstPrinter.cpp b/lib/Target/PowerPC/InstPrinter/PPCInstPrinter.cpp
index c8037b3b6ad785927d061a22d33232f4b55879d8..79af9a74983048ccd471c762aae32a6c964a101a 100644 (file)
--- a/lib/Target/PowerPC/InstPrinter/PPCInstPrinter.cpp
+++ b/lib/Target/PowerPC/InstPrinter/PPCInstPrinter.cpp
@@ -13,21 +13,22 @@
 
 #define DEBUG_TYPE "asm-printer"
 #include "PPCInstPrinter.h"
-#include "PPCPredicates.h"
+#include "MCTargetDesc/PPCBaseInfo.h"
+#include "MCTargetDesc/PPCPredicates.h"
 #include "llvm/MC/MCExpr.h"
 #include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCInstrInfo.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
-#define GET_INSTRUCTION_NAME
 #include "PPCGenAsmWriter.inc"
 
-StringRef PPCInstPrinter::getOpcodeName(unsigned Opcode) const {
-  return getInstructionName(Opcode);
+void PPCInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const {
+  OS << getRegisterName(RegNo);
 }
 
-
-void PPCInstPrinter::printInst(const MCInst *MI, raw_ostream &O) {
+void PPCInstPrinter::printInst(const MCInst *MI, raw_ostream &O,
+                               StringRef Annot) {
   // Check for slwi/srwi mnemonics.
   if (MI->getOpcode() == PPC::RLWINM) {
     unsigned char SH = MI->getOperand(2).getImm();
@@ -46,6 +47,8 @@ void PPCInstPrinter::printInst(const MCInst *MI, raw_ostream &O) {
       O << ", ";
       printOperand(MI, 1, O);
       O << ", " << (unsigned int)SH;
+
+      printAnnotation(O, Annot);
       return;
     }
   }
@@ -56,6 +59,7 @@ void PPCInstPrinter::printInst(const MCInst *MI, raw_ostream &O) {
     printOperand(MI, 0, O);
     O << ", ";
     printOperand(MI, 1, O);
+    printAnnotation(O, Annot);
     return;
   }
   
@@ -69,22 +73,48 @@ void PPCInstPrinter::printInst(const MCInst *MI, raw_ostream &O) {
       O << ", ";
       printOperand(MI, 1, O);
       O << ", " << (unsigned int)SH;
+      printAnnotation(O, Annot);
       return;
     }
   }
   
   printInstruction(MI, O);
+  printAnnotation(O, Annot);
 }
 
 
 void PPCInstPrinter::printPredicateOperand(const MCInst *MI, unsigned OpNo,
                                            raw_ostream &O, 
                                            const char *Modifier) {
-  assert(Modifier && "Must specify 'cc' or 'reg' as predicate op modifier!");
   unsigned Code = MI->getOperand(OpNo).getImm();
+  if (!Modifier) {
+    unsigned CCReg = MI->getOperand(OpNo+1).getReg();
+    unsigned RegNo;
+    switch (CCReg) {
+    default: llvm_unreachable("Unknown CR register");
+    case PPC::CR0: RegNo = 0; break;
+    case PPC::CR1: RegNo = 1; break;
+    case PPC::CR2: RegNo = 2; break;
+    case PPC::CR3: RegNo = 3; break;
+    case PPC::CR4: RegNo = 4; break;
+    case PPC::CR5: RegNo = 5; break;
+    case PPC::CR6: RegNo = 6; break;
+    case PPC::CR7: RegNo = 7; break;
+    }
+
+    // Print the CR bit number. The Code is ((BI << 5) | BO) for a
+    // BCC, but we must have the positive form here (BO == 12)
+    unsigned BO = Code & 0xF;
+    unsigned BI = Code >> 5;
+    assert(BO == 12 && "BO in predicate bit must have the positive form");
+
+    unsigned Value = 4*RegNo + BI;
+    O << Value;
+    return;
+  }
+
   if (StringRef(Modifier) == "cc") {
     switch ((PPC::Predicate)Code) {
-    default: assert(0 && "Invalid predicate");
     case PPC::PRED_ALWAYS: return; // Don't print anything for always.
     case PPC::PRED_LT: O << "lt"; return;
     case PPC::PRED_LE: O << "le"; return;
@@ -165,7 +195,7 @@ void PPCInstPrinter::printcrbitm(const MCInst *MI, unsigned OpNo,
   unsigned CCReg = MI->getOperand(OpNo).getReg();
   unsigned RegNo;
   switch (CCReg) {
-  default: assert(0 && "Unknown CR register");
+  default: llvm_unreachable("Unknown CR register");
   case PPC::CR0: RegNo = 0; break;
   case PPC::CR1: RegNo = 1; break;
   case PPC::CR2: RegNo = 2; break;
@@ -222,7 +252,7 @@ void PPCInstPrinter::printMemRegReg(const MCInst *MI, unsigned OpNo,
 
 /// stripRegisterPrefix - This method strips the character prefix from a
 /// register name so that only the number is left.  Used by for linux asm.
-const char *stripRegisterPrefix(const char *RegName) {
+static const char *stripRegisterPrefix(const char *RegName) {
   switch (RegName[0]) {
   case 'r':
   case 'f':