ARM add some pre-UAL VFP mnemonics for convenience when porting old code.

llvm-svn: 146296

3 files changed, 31 insertions, 6 deletions

diff --git a/llvm/lib/Target/ARM/ARMInstrNEON.td b/llvm/lib/Target/ARM/ARMInstrNEON.td
index c546ad9bf27..f0fa3d26200 100644
--- a/llvm/lib/Target/ARM/ARMInstrNEON.td
+++ b/llvm/lib/Target/ARM/ARMInstrNEON.td
@@ -5308,6 +5308,11 @@ def : Pat<(v2f64 (bitconvert (v4f32 QPR:$src))), (v2f64 QPR:$src)>;
 //===----------------------------------------------------------------------===//
 // Assembler aliases
 //
+def : VFP2InstAlias<"fmdhr${p} $Dd, $Rn",
+                    (VSETLNi32 DPR:$Dd, GPR:$Rn, 1, pred:$p)>;
+def : VFP2InstAlias<"fmdlr${p} $Dd, $Rn",
+                    (VSETLNi32 DPR:$Dd, GPR:$Rn, 0, pred:$p)>;
+
 
 // VADD two-operand aliases.
 def : NEONInstAlias<"vadd${p}.i8 $Vdn, $Vm",
diff --git a/llvm/lib/Target/ARM/ARMInstrVFP.td b/llvm/lib/Target/ARM/ARMInstrVFP.td
index 828b9a2bb34..9839ccd770e 100644
--- a/llvm/lib/Target/ARM/ARMInstrVFP.td
+++ b/llvm/lib/Target/ARM/ARMInstrVFP.td
@@ -1161,15 +1161,26 @@ def FCONSTS : VFPAI<(outs SPR:$Sd), (ins vfp_f32imm:$imm),
 // Assembler aliases.
 //
 
+class VFP2MnemonicAlias<string src, string dst> : MnemonicAlias<src, dst>,
+          Requires<[HasVFP2]>;
 // A few mnemnoic aliases for pre-unifixed syntax. We don't guarantee to
 // support them all, but supporting at least some of the basics is
 // good to be friendly.
-def : MnemonicAlias<"flds", "vldr">;
-def : MnemonicAlias<"fldd", "vldr">;
-def : MnemonicAlias<"fmrs", "vmov">;
-def : MnemonicAlias<"fmsr", "vmov">;
-def : MnemonicAlias<"fsqrts", "vsqrt">;
-def : MnemonicAlias<"fsqrtd", "vsqrt">;
+def : VFP2MnemonicAlias<"flds", "vldr">;
+def : VFP2MnemonicAlias<"fldd", "vldr">;
+def : VFP2MnemonicAlias<"fmrs", "vmov">;
+def : VFP2MnemonicAlias<"fmsr", "vmov">;
+def : VFP2MnemonicAlias<"fsqrts", "vsqrt">;
+def : VFP2MnemonicAlias<"fsqrtd", "vsqrt">;
+def : VFP2MnemonicAlias<"fadds", "vadd.f32">;
+def : VFP2MnemonicAlias<"faddd", "vadd.f64">;
+def : VFP2MnemonicAlias<"fmrdd", "vmov">;
+def : VFP2MnemonicAlias<"fmrds", "vmov">;
+def : VFP2MnemonicAlias<"fmrrd", "vmov">;
+def : VFP2MnemonicAlias<"fmdrr", "vmov">;
+def : VFP2MnemonicAlias<"fmuld", "vmul.f64">;
+def : VFP2MnemonicAlias<"fnegs", "vneg.f32">;
+def : VFP2MnemonicAlias<"fnegd", "vneg.f64">;
 
 def : VFP2InstAlias<"fmstat${p}", (FMSTAT pred:$p)>;
 
diff --git a/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index f616bea190f..19706e95c8e 100644
--- a/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -4523,9 +4523,18 @@ static bool doesIgnoreDataTypeSuffix(StringRef Mnemonic, StringRef DT) {
   return Mnemonic.startswith("vldm") || Mnemonic.startswith("vstm");
 }
 
+static void applyMnemonicAliases(StringRef &Mnemonic, unsigned Features);
 /// Parse an arm instruction mnemonic followed by its operands.
 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
                                SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
+  // Apply mnemonic aliases before doing anything else, as the destination
+  // mnemnonic may include suffices and we want to handle them normally.
+  // The generic tblgen'erated code does this later, at the start of
+  // MatchInstructionImpl(), but that's too late for aliases that include
+  // any sort of suffix.
+  unsigned AvailableFeatures = getAvailableFeatures();
+  applyMnemonicAliases(Name, AvailableFeatures);
+
   // Create the leading tokens for the mnemonic, split by '.' characters.
   size_t Start = 0, Next = Name.find('.');
   StringRef Mnemonic = Name.slice(Start, Next);