[MIPS GlobalISel] Select floor and ceil

Select G_FFLOOR and G_FCEIL for MIPS32.

Differential Revision: https://reviews.llvm.org/D62901

llvm-svn: 362688

2 files changed, 12 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index f9e8c835662..bb10291b6e7 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -274,6 +274,12 @@ static RTLIB::Libcall getRTLibDesc(unsigned Opcode, unsigned Size) {
     assert((Size == 32 || Size == 64 || Size == 128) && "Unsupported size");
     return Size == 128 ? RTLIB::LOG2_F128
                        : Size == 64 ? RTLIB::LOG2_F64 : RTLIB::LOG2_F32;
+  case TargetOpcode::G_FCEIL:
+    assert((Size == 32 || Size == 64) && "Unsupported size");
+    return Size == 64 ? RTLIB::CEIL_F64 : RTLIB::CEIL_F32;
+  case TargetOpcode::G_FFLOOR:
+    assert((Size == 32 || Size == 64) && "Unsupported size");
+    return Size == 64 ? RTLIB::FLOOR_F64 : RTLIB::FLOOR_F32;
   }
   llvm_unreachable("Unknown libcall function");
 }
@@ -372,7 +378,9 @@ LegalizerHelper::libcall(MachineInstr &MI) {
   case TargetOpcode::G_FLOG:
   case TargetOpcode::G_FLOG2:
   case TargetOpcode::G_FEXP:
-  case TargetOpcode::G_FEXP2: {
+  case TargetOpcode::G_FEXP2:
+  case TargetOpcode::G_FCEIL:
+  case TargetOpcode::G_FFLOOR: {
     if (Size > 64) {
       LLVM_DEBUG(dbgs() << "Size " << Size << " too large to legalize.\n");
       return UnableToLegalize;
diff --git a/llvm/lib/Target/Mips/MipsLegalizerInfo.cpp b/llvm/lib/Target/Mips/MipsLegalizerInfo.cpp
index cabaed8e303..4fb61ce457d 100644
--- a/llvm/lib/Target/Mips/MipsLegalizerInfo.cpp
+++ b/llvm/lib/Target/Mips/MipsLegalizerInfo.cpp
@@ -101,6 +101,9 @@ MipsLegalizerInfo::MipsLegalizerInfo(const MipsSubtarget &ST) {
       .legalFor({{s32, s32}, {s32, s64}})
       .minScalar(0, s32);
 
+  getActionDefinitionsBuilder({G_FCEIL, G_FFLOOR})
+      .libcallFor({s32, s64});
+
   computeTables();
   verify(*ST.getInstrInfo());
 }