10929 } else {
10930 bind(below_threshold);
10931 }
10932
10933 testl(len, len);
10934 jccb(Assembler::zero, done);
10935 lea(src, Address(src, len, Address::times_1));
10936 lea(dst, Address(dst, len, Address::times_2));
10937 negptr(len);
10938
10939 // inflate 1 char per iter
10940 bind(copy_chars_loop);
10941 load_unsigned_byte(tmp2, Address(src, len, Address::times_1)); // load byte char
10942 movw(Address(dst, len, Address::times_2), tmp2); // inflate byte char to word
10943 increment(len);
10944 jcc(Assembler::notZero, copy_chars_loop);
10945
10946 bind(done);
10947 }
10948
10949 Assembler::Condition MacroAssembler::negate_condition(Assembler::Condition cond) {
10950 switch (cond) {
10951 // Note some conditions are synonyms for others
10952 case Assembler::zero: return Assembler::notZero;
10953 case Assembler::notZero: return Assembler::zero;
10954 case Assembler::less: return Assembler::greaterEqual;
10955 case Assembler::lessEqual: return Assembler::greater;
10956 case Assembler::greater: return Assembler::lessEqual;
10957 case Assembler::greaterEqual: return Assembler::less;
10958 case Assembler::below: return Assembler::aboveEqual;
10959 case Assembler::belowEqual: return Assembler::above;
10960 case Assembler::above: return Assembler::belowEqual;
10961 case Assembler::aboveEqual: return Assembler::below;
10962 case Assembler::overflow: return Assembler::noOverflow;
10963 case Assembler::noOverflow: return Assembler::overflow;
10964 case Assembler::negative: return Assembler::positive;
10965 case Assembler::positive: return Assembler::negative;
10966 case Assembler::parity: return Assembler::noParity;
10967 case Assembler::noParity: return Assembler::parity;
10968 }
|
10929 } else {
10930 bind(below_threshold);
10931 }
10932
10933 testl(len, len);
10934 jccb(Assembler::zero, done);
10935 lea(src, Address(src, len, Address::times_1));
10936 lea(dst, Address(dst, len, Address::times_2));
10937 negptr(len);
10938
10939 // inflate 1 char per iter
10940 bind(copy_chars_loop);
10941 load_unsigned_byte(tmp2, Address(src, len, Address::times_1)); // load byte char
10942 movw(Address(dst, len, Address::times_2), tmp2); // inflate byte char to word
10943 increment(len);
10944 jcc(Assembler::notZero, copy_chars_loop);
10945
10946 bind(done);
10947 }
10948
10949 void MacroAssembler::cache_wb(Address line)
10950 {
10951 // 64 bit cpus always support clflush
10952 assert(VM_Version::supports_clflush(), "should not reach here on 32-bit");
10953 bool optimized = VM_Version::supports_clflushopt();
10954 bool no_evict = VM_Version::supports_clwb();
10955
10956 // pick the correct implementation
10957
10958 if (optimized) {
10959 if (no_evict) {
10960 clwb(line);
10961 } else {
10962 clflushopt(line);
10963 }
10964 } else {
10965 // no need for fence when using CLFLUSH
10966 clflush(line);
10967 }
10968 }
10969
10970
10971 void MacroAssembler::cache_wbsync(bool is_pre)
10972 {
10973 assert(VM_Version::supports_clflush(), "should not reach here on 32-bit");
10974 bool optimized = VM_Version::supports_clflushopt();
10975 bool no_evict = VM_Version::supports_clwb();
10976
10977 // pick the correct implementation
10978
10979 if (!is_pre && (optimized || no_evict)) {
10980 // need an sfence for post flush when using clflushopt or clwb
10981 // otherwise no no need for any synchroniaztion
10982
10983 sfence();
10984 }
10985 }
10986
10987 Assembler::Condition MacroAssembler::negate_condition(Assembler::Condition cond) {
10988 switch (cond) {
10989 // Note some conditions are synonyms for others
10990 case Assembler::zero: return Assembler::notZero;
10991 case Assembler::notZero: return Assembler::zero;
10992 case Assembler::less: return Assembler::greaterEqual;
10993 case Assembler::lessEqual: return Assembler::greater;
10994 case Assembler::greater: return Assembler::lessEqual;
10995 case Assembler::greaterEqual: return Assembler::less;
10996 case Assembler::below: return Assembler::aboveEqual;
10997 case Assembler::belowEqual: return Assembler::above;
10998 case Assembler::above: return Assembler::belowEqual;
10999 case Assembler::aboveEqual: return Assembler::below;
11000 case Assembler::overflow: return Assembler::noOverflow;
11001 case Assembler::noOverflow: return Assembler::overflow;
11002 case Assembler::negative: return Assembler::positive;
11003 case Assembler::positive: return Assembler::negative;
11004 case Assembler::parity: return Assembler::noParity;
11005 case Assembler::noParity: return Assembler::parity;
11006 }
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