MIPS: Improved checking target ranges for J and JAL instructions.

src/mips/assembler-mips.cc

Index: src/mips/assembler-mips.cc
diff --git a/src/mips/assembler-mips.cc b/src/mips/assembler-mips.cc
index 971e17b995c3f0c299dc234fc941fe34c49bdbb1..f907fe77d13411eab04c199c42cac37d186977cd 100644
--- a/src/mips/assembler-mips.cc
+++ b/src/mips/assembler-mips.cc
@@ -1406,11 +1406,11 @@ void Assembler::j(int32_t target) {
 #if DEBUG
   // Get pc of delay slot.
   uint32_t ipc = reinterpret_cast<uint32_t>(pc_ + 1 * kInstrSize);
-  bool in_range = (ipc ^ static_cast<uint32_t>(target) >>
-                  (kImm26Bits + kImmFieldShift)) == 0;
+  bool in_range = ((ipc ^ static_cast<uint32_t>(target)) >>
+                   (kImm26Bits + kImmFieldShift)) == 0;
   DCHECK(in_range && ((target & 3) == 0));
 #endif
-  GenInstrJump(J, target >> 2);
+  GenInstrJump(J, (target >> 2) & kImm26Mask);
 }
 
 
@@ -1432,12 +1432,12 @@ void Assembler::jal(int32_t target) {
 #ifdef DEBUG
   // Get pc of delay slot.
   uint32_t ipc = reinterpret_cast<uint32_t>(pc_ + 1 * kInstrSize);
-  bool in_range = (ipc ^ static_cast<uint32_t>(target) >>
-                  (kImm26Bits + kImmFieldShift)) == 0;
+  bool in_range = ((ipc ^ static_cast<uint32_t>(target)) >>
+                   (kImm26Bits + kImmFieldShift)) == 0;
   DCHECK(in_range && ((target & 3) == 0));
 #endif
   positions_recorder()->WriteRecordedPositions();
-  GenInstrJump(JAL, target >> 2);
+  GenInstrJump(JAL, (target >> 2) & kImm26Mask);
 }