384 static Code java_code (Code code) { check(code); return _java_code [code]; }
385 static bool can_rewrite (Code code) { check(code); return has_all_flags(code, _bc_can_rewrite, false); }
386 static bool must_rewrite(Bytecodes::Code code) { return can_rewrite(code) && check_must_rewrite(code); }
387 static bool native_byte_order(Code code) { check(code); return has_all_flags(code, _fmt_has_nbo, false); }
388 static bool uses_cp_cache (Code code) { check(code); return has_all_flags(code, _fmt_has_j, false); }
389 // if 'end' is provided, it indicates the end of the code buffer which
390 // should not be read past when parsing.
391 static int special_length_at(Bytecodes::Code code, address bcp, address end = NULL);
392 static int special_length_at(Method* method, address bcp, address end = NULL) { return special_length_at(code_at(method, bcp), bcp, end); }
393 static int raw_special_length_at(address bcp, address end = NULL);
394 static int length_for_code_at(Bytecodes::Code code, address bcp) { int l = length_for(code); return l > 0 ? l : special_length_at(code, bcp); }
395 static int length_at (Method* method, address bcp) { return length_for_code_at(code_at(method, bcp), bcp); }
396 static int java_length_at (Method* method, address bcp) { return length_for_code_at(java_code_at(method, bcp), bcp); }
397 static bool is_java_code (Code code) { return 0 <= code && code < number_of_java_codes; }
398
399 static bool is_aload (Code code) { return (code == _aload || code == _aload_0 || code == _aload_1
400 || code == _aload_2 || code == _aload_3); }
401 static bool is_astore (Code code) { return (code == _astore || code == _astore_0 || code == _astore_1
402 || code == _astore_2 || code == _astore_3); }
403
404 static bool is_zero_const (Code code) { return (code == _aconst_null || code == _iconst_0
405 || code == _fconst_0 || code == _dconst_0); }
406 static bool is_invoke (Code code) { return (_invokevirtual <= code && code <= _invokedynamic); }
407 static bool has_receiver (Code code) { assert(is_invoke(code), ""); return code == _invokevirtual ||
408 code == _invokespecial ||
409 code == _invokeinterface; }
410 static bool has_optional_appendix(Code code) { return code == _invokedynamic || code == _invokehandle; }
411
412 static int compute_flags (const char* format, int more_flags = 0); // compute the flags
413 static int flags (int code, bool is_wide) {
414 assert(code == (u_char)code, "must be a byte");
415 return _flags[code + (is_wide ? (1<<BitsPerByte) : 0)];
416 }
417 static int format_bits (Code code, bool is_wide) { return flags(code, is_wide) & _all_fmt_bits; }
418 static bool has_all_flags (Code code, int test_flags, bool is_wide) {
419 return (flags(code, is_wide) & test_flags) == test_flags;
420 }
421
422 // Initialization
423 static void initialize ();
424 };
425
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384 static Code java_code (Code code) { check(code); return _java_code [code]; }
385 static bool can_rewrite (Code code) { check(code); return has_all_flags(code, _bc_can_rewrite, false); }
386 static bool must_rewrite(Bytecodes::Code code) { return can_rewrite(code) && check_must_rewrite(code); }
387 static bool native_byte_order(Code code) { check(code); return has_all_flags(code, _fmt_has_nbo, false); }
388 static bool uses_cp_cache (Code code) { check(code); return has_all_flags(code, _fmt_has_j, false); }
389 // if 'end' is provided, it indicates the end of the code buffer which
390 // should not be read past when parsing.
391 static int special_length_at(Bytecodes::Code code, address bcp, address end = NULL);
392 static int special_length_at(Method* method, address bcp, address end = NULL) { return special_length_at(code_at(method, bcp), bcp, end); }
393 static int raw_special_length_at(address bcp, address end = NULL);
394 static int length_for_code_at(Bytecodes::Code code, address bcp) { int l = length_for(code); return l > 0 ? l : special_length_at(code, bcp); }
395 static int length_at (Method* method, address bcp) { return length_for_code_at(code_at(method, bcp), bcp); }
396 static int java_length_at (Method* method, address bcp) { return length_for_code_at(java_code_at(method, bcp), bcp); }
397 static bool is_java_code (Code code) { return 0 <= code && code < number_of_java_codes; }
398
399 static bool is_aload (Code code) { return (code == _aload || code == _aload_0 || code == _aload_1
400 || code == _aload_2 || code == _aload_3); }
401 static bool is_astore (Code code) { return (code == _astore || code == _astore_0 || code == _astore_1
402 || code == _astore_2 || code == _astore_3); }
403
404 static bool is_const (Code code) { return (_aconst_null <= code && code <= _ldc2_w); }
405 static bool is_zero_const (Code code) { return (code == _aconst_null || code == _iconst_0
406 || code == _fconst_0 || code == _dconst_0); }
407 static bool is_return (Code code) { return (_ireturn <= code && code <= _return); }
408 static bool is_invoke (Code code) { return (_invokevirtual <= code && code <= _invokedynamic); }
409 static bool has_receiver (Code code) { assert(is_invoke(code), ""); return code == _invokevirtual ||
410 code == _invokespecial ||
411 code == _invokeinterface; }
412 static bool has_optional_appendix(Code code) { return code == _invokedynamic || code == _invokehandle; }
413
414 static int compute_flags (const char* format, int more_flags = 0); // compute the flags
415 static int flags (int code, bool is_wide) {
416 assert(code == (u_char)code, "must be a byte");
417 return _flags[code + (is_wide ? (1<<BitsPerByte) : 0)];
418 }
419 static int format_bits (Code code, bool is_wide) { return flags(code, is_wide) & _all_fmt_bits; }
420 static bool has_all_flags (Code code, int test_flags, bool is_wide) {
421 return (flags(code, is_wide) & test_flags) == test_flags;
422 }
423
424 // Initialization
425 static void initialize ();
426 };
427
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