[MIPS GlobalISel] Select fpext and fptrunc

Select G_FPEXT and G_FPTRUNC for MIPS32.

Differential Revision: https://reviews.llvm.org/D62902

llvm-svn: 362689

2 files changed, 14 insertions, 0 deletions

diff --git a/llvm/lib/Target/Mips/MipsLegalizerInfo.cpp b/llvm/lib/Target/Mips/MipsLegalizerInfo.cpp
index 4fb61ce457d..146ee754183 100644
--- a/llvm/lib/Target/Mips/MipsLegalizerInfo.cpp
+++ b/llvm/lib/Target/Mips/MipsLegalizerInfo.cpp
@@ -104,6 +104,12 @@ MipsLegalizerInfo::MipsLegalizerInfo(const MipsSubtarget &ST) {
   getActionDefinitionsBuilder({G_FCEIL, G_FFLOOR})
       .libcallFor({s32, s64});
 
+  getActionDefinitionsBuilder(G_FPEXT)
+      .legalFor({{s64, s32}});
+
+  getActionDefinitionsBuilder(G_FPTRUNC)
+      .legalFor({{s32, s64}});
+
   computeTables();
   verify(*ST.getInstrInfo());
 }
diff --git a/llvm/lib/Target/Mips/MipsRegisterBankInfo.cpp b/llvm/lib/Target/Mips/MipsRegisterBankInfo.cpp
index 0f9d1064dda..6a4ffe16a35 100644
--- a/llvm/lib/Target/Mips/MipsRegisterBankInfo.cpp
+++ b/llvm/lib/Target/Mips/MipsRegisterBankInfo.cpp
@@ -160,6 +160,14 @@ MipsRegisterBankInfo::getInstrMapping(const MachineInstr &MI) const {
                             FPRValueMapping, FPRValueMapping});
     break;
   }
+  case G_FPEXT:
+    OperandsMapping = getOperandsMapping({&Mips::ValueMappings[Mips::DPRIdx],
+                                          &Mips::ValueMappings[Mips::SPRIdx]});
+    break;
+  case G_FPTRUNC:
+    OperandsMapping = getOperandsMapping({&Mips::ValueMappings[Mips::SPRIdx],
+                                          &Mips::ValueMappings[Mips::DPRIdx]});
+    break;
   case G_CONSTANT:
   case G_FRAME_INDEX:
   case G_GLOBAL_VALUE: