Use uint for the option and assert it >= 256

Author: limingliu-ampere

src/hotspot/cpu/aarch64/globals_aarch64.hpp

@@ -89,10 +89,10 @@ define_pd_global(intx, InlineSmallCode,          1000);
           "Use CRC32 instructions for CRC32 computation")               \
   product(bool, UseCryptoPmullForCRC32, false,                          \
           "Use Crypto PMULL instructions for CRC32 computation")        \
-  product(intx, CryptoPmullForCRC32LowLimit, 256, DIAGNOSTIC,           \
+  product(uint, CryptoPmullForCRC32LowLimit, 256, DIAGNOSTIC,           \
           "Minimum size in bytes when Crypto PMULL will be used."       \
           "Value must be a multiple of 128.")                           \
-          range(256, max_jint)                                          \
+          range(256, max_juint)                                         \
   product(bool, UseSIMDForMemoryOps, false,                             \
           "Use SIMD instructions in generated memory move code")        \
   product(bool, UseSIMDForArrayEquals, true,                            \

src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp

@@ -4331,6 +4331,7 @@ void MacroAssembler::kernel_crc32_using_crypto_pmull(Register crc, Register buf,
         Register len, Register tmp0, Register tmp1, Register tmp2, Register tmp3) {
     Label CRC_by4_loop, CRC_by1_loop, CRC_less128, CRC_by128_pre, CRC_by32_loop, CRC_less32, L_exit;
     assert_different_registers(crc, buf, len, tmp0, tmp1, tmp2);
+    assert(CryptoPmullForCRC32LowLimit >= 256);
 
     subs(tmp0, len, CryptoPmullForCRC32LowLimit);
     mvnw(crc, crc);
@@ -4696,6 +4697,7 @@ void MacroAssembler::kernel_crc32c_using_crypto_pmull(Register crc, Register buf
         Register len, Register tmp0, Register tmp1, Register tmp2, Register tmp3) {
     Label CRC_by4_loop, CRC_by1_loop, CRC_less128, CRC_by128_pre, CRC_by32_loop, CRC_less32, L_exit;
     assert_different_registers(crc, buf, len, tmp0, tmp1, tmp2);
+    assert(CryptoPmullForCRC32LowLimit >= 256);
 
     subs(tmp0, len, CryptoPmullForCRC32LowLimit);
     br(Assembler::GE, CRC_by128_pre);