[PATCH] D51225: Add R_HEX_11 support

[Sid Manning via Phabricator via llvm-commits]

sidneym created this revision.
sidneym added reviewers: ruiu, kparzysz, shankare, bcain.
sidneym added a project: lld.
Herald added subscribers: MaskRay, arichardson, emaste.
Herald added a reviewer: espindola.

Since this is always extended it has just 6 effective bits.


Repository:
  rLLD LLVM Linker

https://reviews.llvm.org/D51225

Files:
  ELF/Arch/Hexagon.cpp
  test/ELF/hexagon.s


Index: test/ELF/hexagon.s
===================================================================
--- test/ELF/hexagon.s
+++ test/ELF/hexagon.s
@@ -194,3 +194,10 @@
 # 0xb0000000
 r0 = add(r1, ##_start)
 # CHECK: b001c000   r0 = add(r1,##69632) }
+
+# R_HEX_11_X
+r0 = memw(r1+##_start)
+# CHECK: r0 = memw(r1+##69632)
+
+memw(r0+##_start) = r1
+# CHECK: memw(r0+##69632) = r1
Index: ELF/Arch/Hexagon.cpp
===================================================================
--- ELF/Arch/Hexagon.cpp
+++ ELF/Arch/Hexagon.cpp
@@ -112,6 +112,12 @@
   return 0x00001fe0;
 }
 
+static uint32_t findMaskR11(uint32_t Insn) {
+  if ((0xff000000 & Insn) == 0xa1000000)
+    return 0x060020ff;
+  return 0x06003fe0;
+}
+
 static uint32_t findMaskR16(uint32_t Insn) {
   if ((0xff000000 & Insn) == 0x48000000)
     return 0x061f20ff;
@@ -140,6 +146,9 @@
   case R_HEX_8_X:
     or32le(Loc, applyMask(findMaskR8(read32le(Loc)), Val));
     break;
+  case R_HEX_11_X:
+    or32le(Loc, applyMask(findMaskR11(read32le(Loc)), Val & 0x3f));
+    break;
   case R_HEX_12_X:
     or32le(Loc, applyMask(0x000007e0, Val));
     break;


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