[Sparc] Emit large negative adjustments to SP/FP with sethi+xor instead of sethi+or. This generates correct code for both sparc32 and sparc64.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195576 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/Sparc/Sparc.h

@@ -105,5 +105,22 @@ namespace llvm {
     }
     llvm_unreachable("Invalid cond code");
   }
+
+  inline static unsigned HI22(int64_t imm) {
+    return (unsigned)((imm >> 10) & ((1 << 22)-1));
+  }
+
+  inline static unsigned LO10(int64_t imm) {
+    return (unsigned)(imm & 0x3FF);
+  }
+
+  inline static unsigned HIX22(int64_t imm) {
+    return HI22(~imm);
+  }
+
+  inline static unsigned LOX10(int64_t imm) {
+    return ~LO10(~imm);
+  }
+
 }  // end namespace llvm
 #endif