[PATCH] D138016: [Object] Add some more LoongArch support

[WÁNG Xuěruì via Phabricator via llvm-commits]

xen0n created this revision.
xen0n added reviewers: MaskRay, SixWeining, wangleiat, xry111, gonglingqin.
Herald added subscribers: StephenFan, hiraditya.
Herald added a project: All.
xen0n requested review of this revision.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.

Add ELFObjectFileBase::getLoongArchFeatures, and return the proper ELF
relative reloc type for LoongArch.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D138016

Files:
  llvm/include/llvm/Object/ELFObjectFile.h
  llvm/lib/Object/ELF.cpp
  llvm/lib/Object/ELFObjectFile.cpp


Index: llvm/lib/Object/ELFObjectFile.cpp
===================================================================
--- llvm/lib/Object/ELFObjectFile.cpp
+++ llvm/lib/Object/ELFObjectFile.cpp
@@ -341,6 +341,26 @@
   return Features;
 }
 
+SubtargetFeatures ELFObjectFileBase::getLoongArchFeatures() const {
+  SubtargetFeatures Features;
+
+  switch (getPlatformFlags() & ELF::EF_LOONGARCH_ABI_MODIFIER_MASK) {
+  case ELF::EF_LOONGARCH_ABI_SOFT_FLOAT:
+    break;
+  case ELF::EF_LOONGARCH_ABI_DOUBLE_FLOAT:
+    Features.AddFeature("d");
+    // D implies F according to LoongArch ISA spec.
+    // It's only two features so don't bother with [[fallthrough]] at present.
+    Features.AddFeature("f");
+    break;
+  case ELF::EF_LOONGARCH_ABI_SINGLE_FLOAT:
+    Features.AddFeature("f");
+    break;
+  }
+
+  return Features;
+}
+
 SubtargetFeatures ELFObjectFileBase::getFeatures() const {
   switch (getEMachine()) {
   case ELF::EM_MIPS:
@@ -349,6 +369,8 @@
     return getARMFeatures();
   case ELF::EM_RISCV:
     return getRISCVFeatures();
+  case ELF::EM_LOONGARCH:
+    return getLoongArchFeatures();
   default:
     return SubtargetFeatures();
   }
Index: llvm/lib/Object/ELF.cpp
===================================================================
--- llvm/lib/Object/ELF.cpp
+++ llvm/lib/Object/ELF.cpp
@@ -223,6 +223,8 @@
     break;
   case ELF::EM_BPF:
     break;
+  case ELF::EM_LOONGARCH:
+    return ELF::R_LARCH_RELATIVE;
   default:
     break;
   }
Index: llvm/include/llvm/Object/ELFObjectFile.h
===================================================================
--- llvm/include/llvm/Object/ELFObjectFile.h
+++ llvm/include/llvm/Object/ELFObjectFile.h
@@ -56,6 +56,7 @@
   SubtargetFeatures getMIPSFeatures() const;
   SubtargetFeatures getARMFeatures() const;
   SubtargetFeatures getRISCVFeatures() const;
+  SubtargetFeatures getLoongArchFeatures() const;
 
   StringRef getAMDGPUCPUName() const;
 


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D138016.475395.patch
Type: text/x-patch
Size: 1923 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20221115/99772806/attachment.bin>