[llvm] r209803 - Restore getInvertedCondCode() from the phased-out backend, fixing disassembly for NV

[Artyom Skrobov]

Author: askrobov
Date: Thu May 29 06:34:50 2014
New Revision: 209803

URL: http://llvm.org/viewvc/llvm-project?rev=209803&view=rev
Log:
Restore getInvertedCondCode() from the phased-out backend, fixing disassembly for NV

Modified:
    llvm/trunk/lib/Target/AArch64/Utils/AArch64BaseInfo.h
    llvm/trunk/test/MC/Disassembler/AArch64/basic-a64-instructions.txt

Modified: llvm/trunk/lib/Target/AArch64/Utils/AArch64BaseInfo.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AArch64/Utils/AArch64BaseInfo.h?rev=209803&r1=209802&r2=209803&view=diff
==============================================================================
--- llvm/trunk/lib/Target/AArch64/Utils/AArch64BaseInfo.h (original)
+++ llvm/trunk/lib/Target/AArch64/Utils/AArch64BaseInfo.h Thu May 29 06:34:50 2014
@@ -233,23 +233,9 @@ inline static const char *getCondCodeNam
 }
 
 inline static CondCode getInvertedCondCode(CondCode Code) {
-  switch (Code) {
-  default: llvm_unreachable("Unknown condition code");
-  case EQ:  return NE;
-  case NE:  return EQ;
-  case HS:  return LO;
-  case LO:  return HS;
-  case MI:  return PL;
-  case PL:  return MI;
-  case VS:  return VC;
-  case VC:  return VS;
-  case HI:  return LS;
-  case LS:  return HI;
-  case GE:  return LT;
-  case LT:  return GE;
-  case GT:  return LE;
-  case LE:  return GT;
-  }
+  // To reverse a condition it's necessary to only invert the low bit:
+
+  return static_cast<CondCode>(static_cast<unsigned>(Code) ^ 0x1);
 }
 
 /// Given a condition code, return NZCV flags that would satisfy that condition.

Modified: llvm/trunk/test/MC/Disassembler/AArch64/basic-a64-instructions.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/Disassembler/AArch64/basic-a64-instructions.txt?rev=209803&r1=209802&r2=209803&view=diff
==============================================================================
--- llvm/trunk/test/MC/Disassembler/AArch64/basic-a64-instructions.txt (original)
+++ llvm/trunk/test/MC/Disassembler/AArch64/basic-a64-instructions.txt Thu May 29 06:34:50 2014
@@ -965,16 +965,18 @@
 
 # CHECK: cinv    w3, w5, gt
 # CHECK: cinv    wzr, w4, le
-# CHECK: csetm    w9, lt
+# CHECK: csetm   w9, lt
 # CHECK: cinv    x3, x5, gt
 # CHECK: cinv    xzr, x4, le
-# CHECK: csetm    x9, lt
+# CHECK: csetm   x9, lt
+# CHECK: cinv    x0, x0, nv
 0xa3 0xd0 0x85 0x5a
 0x9f 0xc0 0x84 0x5a
 0xe9 0xa3 0x9f 0x5a
 0xa3 0xd0 0x85 0xda
 0x9f 0xc0 0x84 0xda
 0xe9 0xa3 0x9f 0xda
+0x00 0xe0 0x80 0xda 
 
 # CHECK: cneg     w3, w5, gt
 # CHECK: cneg     wzr, w4, le