src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.asm.aarch64/src/org/graalvm/compiler/asm/aarch64/AArch64Assembler.java

*** 878,896 ****
       * @param pos Position at which instruction is inserted into buffer. -1 means insert at end.
       */
      protected void tbnz(Register reg, int uimm6, int imm16, int pos) {
          assert reg.getRegisterCategory().equals(CPU);
          assert NumUtil.isUnsignedNbit(6, uimm6);
!         assert NumUtil.isSignedNbit(18, imm16);
!         assert (imm16 & 3) == 0;
          // size bit is overloaded as top bit of uimm6 bit index
          int size = (((uimm6 >> 5) & 1) == 0 ? 32 : 64);
          // remaining 5 bits are encoded lower down
!         int uimm5 = uimm6 >> 1;
!         int offset = (imm16 & NumUtil.getNbitNumberInt(16)) >> 2;
          InstructionType type = generalFromSize(size);
!         int encoding = type.encoding | TBNZ.encoding | (uimm5 << 19) | (offset << 5) | rd(reg);
          if (pos == -1) {
              emitInt(encoding);
          } else {
              emitInt(encoding, pos);
          }
--- 878,896 ----
       * @param pos Position at which instruction is inserted into buffer. -1 means insert at end.
       */
      protected void tbnz(Register reg, int uimm6, int imm16, int pos) {
          assert reg.getRegisterCategory().equals(CPU);
          assert NumUtil.isUnsignedNbit(6, uimm6);
!         assert NumUtil.isSignedNbit(16, imm16) : String.format("Offset value must fit in 16 bits signed: 0x%x", imm16);
!         assert (imm16 & 3) == 0 : String.format("Lower two bits must be zero: 0x%x", imm16 & 3);
          // size bit is overloaded as top bit of uimm6 bit index
          int size = (((uimm6 >> 5) & 1) == 0 ? 32 : 64);
          // remaining 5 bits are encoded lower down
!         int uimm5 = uimm6 & 0x1F;
!         int imm14 = (imm16 & NumUtil.getNbitNumberInt(16)) >> 2;
          InstructionType type = generalFromSize(size);
!         int encoding = type.encoding | TBNZ.encoding | (uimm5 << 19) | (imm14 << 5) | rd(reg);
          if (pos == -1) {
              emitInt(encoding);
          } else {
              emitInt(encoding, pos);
          }
*** 905,923 ****
       * @param pos Position at which instruction is inserted into buffer. -1 means insert at end.
       */
      protected void tbz(Register reg, int uimm6, int imm16, int pos) {
          assert reg.getRegisterCategory().equals(CPU);
          assert NumUtil.isUnsignedNbit(6, uimm6);
!         assert NumUtil.isSignedNbit(18, imm16);
!         assert (imm16 & 3) == 0;
          // size bit is overloaded as top bit of uimm6 bit index
          int size = (((uimm6 >> 5) & 1) == 0 ? 32 : 64);
          // remaining 5 bits are encoded lower down
!         int uimm5 = uimm6 >> 1;
!         int offset = (imm16 & NumUtil.getNbitNumberInt(16)) >> 2;
          InstructionType type = generalFromSize(size);
!         int encoding = type.encoding | TBZ.encoding | (uimm5 << 19) | (offset << 5) | rd(reg);
          if (pos == -1) {
              emitInt(encoding);
          } else {
              emitInt(encoding, pos);
          }
--- 905,923 ----
       * @param pos Position at which instruction is inserted into buffer. -1 means insert at end.
       */
      protected void tbz(Register reg, int uimm6, int imm16, int pos) {
          assert reg.getRegisterCategory().equals(CPU);
          assert NumUtil.isUnsignedNbit(6, uimm6);
!         assert NumUtil.isSignedNbit(16, imm16) : String.format("Offset value must fit in 16 bits signed: 0x%x", imm16);
!         assert (imm16 & 3) == 0 : String.format("Lower two bits must be zero: 0x%x", imm16 & 3);
          // size bit is overloaded as top bit of uimm6 bit index
          int size = (((uimm6 >> 5) & 1) == 0 ? 32 : 64);
          // remaining 5 bits are encoded lower down
!         int uimm5 = uimm6 & 0x1F;
!         int imm14 = (imm16 & NumUtil.getNbitNumberInt(16)) >> 2;
          InstructionType type = generalFromSize(size);
!         int encoding = type.encoding | TBZ.encoding | (uimm5 << 19) | (imm14 << 5) | rd(reg);
          if (pos == -1) {
              emitInt(encoding);
          } else {
              emitInt(encoding, pos);
          }