xinyangli
2824efad33
NJU-ProjectN/nemu eb63cf3568dbf4e0c3c6ef462e6ec685550fabbc Merge pull request #76 from rijuyuezhu/master
102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
/***************************************************************************************
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* Copyright (c) 2014-2022 Zihao Yu, Nanjing University
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*
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* NEMU is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan PSL v2.
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* You may obtain a copy of Mulan PSL v2 at:
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* http://license.coscl.org.cn/MulanPSL2
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*
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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*
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* See the Mulan PSL v2 for more details.
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***************************************************************************************/
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#ifndef __CPU_DECODE_H__
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#define __CPU_DECODE_H__
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#include <isa.h>
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typedef struct Decode {
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vaddr_t pc;
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vaddr_t snpc; // static next pc
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vaddr_t dnpc; // dynamic next pc
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ISADecodeInfo isa;
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IFDEF(CONFIG_ITRACE, char logbuf[128]);
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} Decode;
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// --- pattern matching mechanism ---
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__attribute__((always_inline))
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static inline void pattern_decode(const char *str, int len,
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uint64_t *key, uint64_t *mask, uint64_t *shift) {
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uint64_t __key = 0, __mask = 0, __shift = 0;
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#define macro(i) \
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if ((i) >= len) goto finish; \
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else { \
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char c = str[i]; \
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if (c != ' ') { \
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Assert(c == '0' || c == '1' || c == '?', \
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"invalid character '%c' in pattern string", c); \
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__key = (__key << 1) | (c == '1' ? 1 : 0); \
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__mask = (__mask << 1) | (c == '?' ? 0 : 1); \
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__shift = (c == '?' ? __shift + 1 : 0); \
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} \
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}
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#define macro2(i) macro(i); macro((i) + 1)
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#define macro4(i) macro2(i); macro2((i) + 2)
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#define macro8(i) macro4(i); macro4((i) + 4)
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#define macro16(i) macro8(i); macro8((i) + 8)
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#define macro32(i) macro16(i); macro16((i) + 16)
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#define macro64(i) macro32(i); macro32((i) + 32)
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macro64(0);
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panic("pattern too long");
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#undef macro
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finish:
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*key = __key >> __shift;
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*mask = __mask >> __shift;
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*shift = __shift;
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}
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__attribute__((always_inline))
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static inline void pattern_decode_hex(const char *str, int len,
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uint64_t *key, uint64_t *mask, uint64_t *shift) {
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uint64_t __key = 0, __mask = 0, __shift = 0;
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#define macro(i) \
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if ((i) >= len) goto finish; \
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else { \
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char c = str[i]; \
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if (c != ' ') { \
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Assert((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || c == '?', \
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"invalid character '%c' in pattern string", c); \
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__key = (__key << 4) | (c == '?' ? 0 : (c >= '0' && c <= '9') ? c - '0' : c - 'a' + 10); \
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__mask = (__mask << 4) | (c == '?' ? 0 : 0xf); \
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__shift = (c == '?' ? __shift + 4 : 0); \
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} \
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}
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macro16(0);
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panic("pattern too long");
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#undef macro
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finish:
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*key = __key >> __shift;
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*mask = __mask >> __shift;
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*shift = __shift;
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}
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// --- pattern matching wrappers for decode ---
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#define INSTPAT(pattern, ...) do { \
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uint64_t key, mask, shift; \
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pattern_decode(pattern, STRLEN(pattern), &key, &mask, &shift); \
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if ((((uint64_t)INSTPAT_INST(s) >> shift) & mask) == key) { \
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INSTPAT_MATCH(s, ##__VA_ARGS__); \
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goto *(__instpat_end); \
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} \
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} while (0)
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#define INSTPAT_START(name) { const void ** __instpat_end = &&concat(__instpat_end_, name);
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#define INSTPAT_END(name) concat(__instpat_end_, name): ; }
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#endif
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