diff options
Diffstat (limited to 'src/sim/instr.cc')
| -rw-r--r-- | src/sim/instr.cc | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/src/sim/instr.cc b/src/sim/instr.cc new file mode 100644 index 0000000..08edf5e --- /dev/null +++ b/src/sim/instr.cc @@ -0,0 +1,53 @@ +#include "instr.h" +#include <functional> +#include <map> +#include <unordered_map> + +// clang-format off +#define INIT_INSTRUCTION(mnemonic, body) \ + {mnemonic, [](signed int &s1, signed int &s2, signed int &s3) { \ + body; \ + }} +// clang-format on + +namespace instr +{ +// clang-format off +const std::unordered_map<Mnemonic, std::function<void(signed int &s1, signed int &s2, signed int &s3)>> + // clang-format on + instr_map = { + + /* R type instructions */ + // TODO these need to be WRAPPED with a function that sets overflow. + // future note to self, if these are more than 2 lines each, you're + // doing it wrong + INIT_INSTRUCTION(ADD, s3 = s1 + s2;), + INIT_INSTRUCTION(SUB, s3 = s1 - s2;), + + /* I type instructions */ + + /* J type instructions */ + + /* NOP */ + INIT_INSTRUCTION(NOP, (void)s3; (void)s2; (void)s1;), + +}; + +const std::unordered_map<unsigned int, Mnemonic> mnemonic_map = { + {0b0000100, ADD}, {0b0001000, SUB}, {0b0001100, MUL}, + {0b0010000, QUOT}, {0b0010100, REM}, {0b0011000, SFTR}, + {0b0011100, SFTL}, {0b0100000, AND}, {0b0100100, OR}, + {0b0101000, NOT}, {0b0101100, XOR}, {0b0110000, ADDV}, + {0b0110100, SUBV}, {0b0111000, MULV}, {0b0111100, DIVV}, + {0b1000000, CMP}, {0b1000100, CEV}, {0b000101, LOAD}, + {0b001001, LOADV}, {0b0001101, ADDI}, {0b0010001, SUBI}, + {0b0010101, SFTRI}, {0b0011101, SFTLI}, {0b0100001, ANDI}, + {0b0100101, ORI}, {0b0101001, XORI}, {0b0101101, STORE}, + {0b0110001, STOREV}, {0b0000101, CEV}, {0b0000101, LOAD}, + {0b0001001, LOADV}, {0b0001001, LOADV}, {0b0000110, JMP}, + {0b0001010, JRL}, {0b0001110, JAL}, {0b0010010, BEQ}, + {0b0010110, BGT}, {0b0011010, BUF}, {0b0011110, BOF}, + {0b0100010, PUSH}, {0b0100110, POP}, + +}; +} // namespace instr |