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path: root/recipes/llvm/llvm2.7/r104653-BFC-BFI.patch
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Index: llvm-2.7/lib/Target/ARM/ARMCodeEmitter.cpp
===================================================================
--- llvm-2.7.orig/lib/Target/ARM/ARMCodeEmitter.cpp	2010-07-21 12:28:57.000000000 +0200
+++ llvm-2.7/lib/Target/ARM/ARMCodeEmitter.cpp	2010-07-21 12:36:04.000000000 +0200
@@ -778,10 +778,6 @@
                                                    unsigned ImplicitRn) {
   const TargetInstrDesc &TID = MI.getDesc();
 
-  if (TID.Opcode == ARM::BFC) {
-    llvm_report_error("ARMv6t2 JIT is not yet supported.");
-  }
-
   // Part of binary is determined by TableGn.
   unsigned Binary = getBinaryCodeForInstr(MI);
 
@@ -817,6 +813,15 @@
       Binary |= ((Hi16 >> 12) & 0xF) << 16;
       emitWordLE(Binary);
       return;
+  } else if((TID.Opcode == ARM::BFC) || (TID.Opcode == ARM::BFI)) {
+      uint32_t v = ~MI.getOperand(2).getImm();
+      int32_t lsb = CountTrailingZeros_32(v);
+      int32_t msb = (32 - CountLeadingZeros_32(v)) - 1;
+      // Insts[20-16] = msb, Insts[11-7] = lsb
+      Binary |= (msb & 0x1F) << 16;
+      Binary |= (lsb & 0x1F) << 7;
+      emitWordLE(Binary);
+      return;
   }
 
   // If this is a two-address operand, skip it. e.g. MOVCCr operand 1.