[PowerPC] Support @higher et.al. modifiers

This adds support for the @higher, @highera, @highest, and @highesta
modifers, including some missing relocation types.

llvm-svn: 184550

4 files changed, 58 insertions, 2 deletions

diff --git a/llvm/lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp b/llvm/lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp
index 964f2722833..6318d416f5e 100644
--- a/llvm/lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp
+++ b/llvm/lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp
@@ -575,6 +575,18 @@ ExtractModifierFromExpr(const MCExpr *E,
     case MCSymbolRefExpr::VK_PPC_HA:
       Variant = PPCMCExpr::VK_PPC_HA;
       break;
+    case MCSymbolRefExpr::VK_PPC_HIGHER:
+      Variant = PPCMCExpr::VK_PPC_HIGHER;
+      break;
+    case MCSymbolRefExpr::VK_PPC_HIGHERA:
+      Variant = PPCMCExpr::VK_PPC_HIGHERA;
+      break;
+    case MCSymbolRefExpr::VK_PPC_HIGHEST:
+      Variant = PPCMCExpr::VK_PPC_HIGHEST;
+      break;
+    case MCSymbolRefExpr::VK_PPC_HIGHESTA:
+      Variant = PPCMCExpr::VK_PPC_HIGHESTA;
+      break;
     default:
       return 0;
     }
diff --git a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCELFObjectWriter.cpp b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCELFObjectWriter.cpp
index ed775295492..7a95bcc00be 100644
--- a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCELFObjectWriter.cpp
+++ b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCELFObjectWriter.cpp
@@ -96,6 +96,18 @@ unsigned PPCELFObjectWriter::getRelocTypeInner(const MCValue &Target,
       case MCSymbolRefExpr::VK_PPC_HA:
         Type = ELF::R_PPC_ADDR16_HA;
         break;
+      case MCSymbolRefExpr::VK_PPC_HIGHER:
+        Type = ELF::R_PPC64_ADDR16_HIGHER;
+        break;
+      case MCSymbolRefExpr::VK_PPC_HIGHERA:
+        Type = ELF::R_PPC64_ADDR16_HIGHERA;
+        break;
+      case MCSymbolRefExpr::VK_PPC_HIGHEST:
+        Type = ELF::R_PPC64_ADDR16_HIGHEST;
+        break;
+      case MCSymbolRefExpr::VK_PPC_HIGHESTA:
+        Type = ELF::R_PPC64_ADDR16_HIGHESTA;
+        break;
       case MCSymbolRefExpr::VK_PPC_TOC:
         Type = ELF::R_PPC64_TOC16;
         break;
diff --git a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.cpp b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.cpp
index 8a346b422d2..db0f57dfb3a 100644
--- a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.cpp
+++ b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.cpp
@@ -42,6 +42,10 @@ void PPCMCExpr::PrintImpl(raw_ostream &OS) const {
     case VK_PPC_LO: OS << "@l"; break;
     case VK_PPC_HI: OS << "@h"; break;
     case VK_PPC_HA: OS << "@ha"; break;
+    case VK_PPC_HIGHER: OS << "@higher"; break;
+    case VK_PPC_HIGHERA: OS << "@highera"; break;
+    case VK_PPC_HIGHEST: OS << "@highest"; break;
+    case VK_PPC_HIGHESTA: OS << "@highesta"; break;
     }
   }
 }
@@ -66,7 +70,19 @@ PPCMCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
         Result = (Result >> 16) & 0xffff;
         break;
       case VK_PPC_HA:
-        Result = ((Result >> 16) + ((Result & 0x8000) ? 1 : 0)) & 0xffff;
+        Result = ((Result + 0x8000) >> 16) & 0xffff;
+        break;
+      case VK_PPC_HIGHER:
+        Result = (Result >> 32) & 0xffff;
+        break;
+      case VK_PPC_HIGHERA:
+        Result = ((Result + 0x8000) >> 32) & 0xffff;
+        break;
+      case VK_PPC_HIGHEST:
+        Result = (Result >> 48) & 0xffff;
+        break;
+      case VK_PPC_HIGHESTA:
+        Result = ((Result + 0x8000) >> 48) & 0xffff;
         break;
     }
     Res = MCValue::get(Result);
@@ -88,6 +104,18 @@ PPCMCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
       case VK_PPC_HA:
         Modifier = MCSymbolRefExpr::VK_PPC_HA;
         break;
+      case VK_PPC_HIGHERA:
+        Modifier = MCSymbolRefExpr::VK_PPC_HIGHERA;
+        break;
+      case VK_PPC_HIGHER:
+        Modifier = MCSymbolRefExpr::VK_PPC_HIGHER;
+        break;
+      case VK_PPC_HIGHEST:
+        Modifier = MCSymbolRefExpr::VK_PPC_HIGHEST;
+        break;
+      case VK_PPC_HIGHESTA:
+        Modifier = MCSymbolRefExpr::VK_PPC_HIGHESTA;
+        break;
     }
     Sym = MCSymbolRefExpr::Create(&Sym->getSymbol(), Modifier, Context);
     Res = MCValue::get(Sym, Value.getSymB(), Value.getConstant());
diff --git a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.h b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.h
index 150acf60529..3cbb493bc6b 100644
--- a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.h
+++ b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCExpr.h
@@ -22,7 +22,11 @@ public:
     VK_PPC_None,
     VK_PPC_LO,
     VK_PPC_HI,
-    VK_PPC_HA
+    VK_PPC_HA,
+    VK_PPC_HIGHER,
+    VK_PPC_HIGHERA,
+    VK_PPC_HIGHEST,
+    VK_PPC_HIGHESTA
   };
 
 private: