diff options
| author | bd <bdunahu@operationnull.com> | 2025-03-28 18:10:14 -0400 |
|---|---|---|
| committer | bd <bdunahu@operationnull.com> | 2025-03-28 18:10:14 -0400 |
| commit | 136417edd709f0e2d30931d222b658ff7dd9a5a8 (patch) | |
| tree | 7ecf0837278e46146360134bb43252357acfe494 /src/utils/utils.cc | |
| parent | ab6d02361b04a18b7823aef0ff1cb0ff2a215ec2 (diff) | |
add get_instr_fields func to parse instruction fields from raw bits
Diffstat (limited to 'src/utils/utils.cc')
| -rw-r--r-- | src/utils/utils.cc | 59 |
1 files changed, 54 insertions, 5 deletions
diff --git a/src/utils/utils.cc b/src/utils/utils.cc index 3a11c2c..3b140e0 100644 --- a/src/utils/utils.cc +++ b/src/utils/utils.cc @@ -4,14 +4,62 @@ #include <string> #include <vector> -void get_bit_fields(int address, int *tag, int *index, int *offset) +static Logger *global_log = Logger::getInstance(); + +void get_cache_fields(int address, int *tag, int *index, int *offset) { - *tag = GET_MID_BITS( - address, L1_CACHE_LINE_SPEC + LINE_SPEC, MEM_WORD_SPEC); + *tag = GET_MID_BITS(address, L1_CACHE_LINE_SPEC + LINE_SPEC, MEM_WORD_SPEC); *index = GET_MID_BITS(address, LINE_SPEC, L1_CACHE_LINE_SPEC + LINE_SPEC); *offset = GET_LS_BITS(address, LINE_SPEC); } +void get_instr_fields( + signed int &s1, + signed int &s2, + signed int &s3, + unsigned int &type, + unsigned int &opcode) +{ + type = GET_LS_BITS(s1, TYPE_SIZE); + switch (type) { + case 0: + // R-TYPE + opcode = GET_MID_BITS(s1, TYPE_SIZE, TYPE_SIZE + R_OPCODE_SIZE); + s3 = GET_MID_BITS( + s1, TYPE_SIZE + R_OPCODE_SIZE + (REG_SIZE * 2), + TYPE_SIZE + R_OPCODE_SIZE + (REG_SIZE * 3)); + s2 = GET_MID_BITS( + s1, TYPE_SIZE + R_OPCODE_SIZE + REG_SIZE, + TYPE_SIZE + R_OPCODE_SIZE + (REG_SIZE * 2)); + s1 = GET_MID_BITS( + s1, TYPE_SIZE + R_OPCODE_SIZE, + TYPE_SIZE + R_OPCODE_SIZE + REG_SIZE); + break; + case 1: + // I-TYPE + opcode = GET_MID_BITS(s1, TYPE_SIZE, TYPE_SIZE + OPCODE_SIZE); + s3 = GET_MID_BITS( + s1, TYPE_SIZE + OPCODE_SIZE + (REG_SIZE * 2), WORD_SPEC); + s2 = GET_MID_BITS( + s1, TYPE_SIZE + OPCODE_SIZE + REG_SIZE, + TYPE_SIZE + OPCODE_SIZE + (REG_SIZE * 2)); + s1 = GET_MID_BITS( + s1, TYPE_SIZE + OPCODE_SIZE, TYPE_SIZE + OPCODE_SIZE + REG_SIZE); + break; + case 2: + // J-TYPE + opcode = GET_MID_BITS(s1, TYPE_SIZE, TYPE_SIZE + OPCODE_SIZE); + s2 = GET_MID_BITS(s1, TYPE_SIZE + OPCODE_SIZE + REG_SIZE, WORD_SPEC); + s1 = GET_MID_BITS( + s1, TYPE_SIZE + OPCODE_SIZE, TYPE_SIZE + OPCODE_SIZE + REG_SIZE); + break; + default: + global_log->log( + DEBUG, + string_format("%s returning invalid type: %d", __FUNCTION__, type)); + } +} + const std::string string_format(const char *const zcFormat, ...) { va_list vaArgs; @@ -28,8 +76,9 @@ const std::string string_format(const char *const zcFormat, ...) return std::string(zc.data(), iLen); } -int wrap_address(int address) { - if (address < 0){ +int wrap_address(int address) +{ + if (address < 0) { return ((address % MEM_WORDS) + MEM_WORDS) % MEM_WORDS; } return address % MEM_WORDS; |