diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/sim/ex.cc | 173 |
1 files changed, 140 insertions, 33 deletions
diff --git a/src/sim/ex.cc b/src/sim/ex.cc index fbf460f..292337b 100644 --- a/src/sim/ex.cc +++ b/src/sim/ex.cc @@ -8,7 +8,7 @@ // clang-format off #define INIT_INSTRUCTION(mnemonic, body) \ - {mnemonic, [this](signed int &s1, signed int &s2) { \ + {mnemonic, [this](signed int &s1, signed int s2) { \ body; \ }} // clang-format on @@ -22,74 +22,181 @@ EX::EX(Stage *stage) : Stage(stage) INIT_INSTRUCTION( ADD, { - this->overflow_guard(s1, s2); s1 = s1 + s2; + (void)this; }), INIT_INSTRUCTION( SUB, { - this->overflow_guard(s1, -s2); s1 = s1 - s2; + (void)this; }), - INIT_INSTRUCTION(MUL, {}), - INIT_INSTRUCTION(QUOT, {}), - INIT_INSTRUCTION(REM, {}), - INIT_INSTRUCTION(SFTR, {}), - INIT_INSTRUCTION(SFTL, {}), - INIT_INSTRUCTION(AND, {}), - INIT_INSTRUCTION(OR, {}), - INIT_INSTRUCTION(NOT, {}), - INIT_INSTRUCTION(XOR, {}), - INIT_INSTRUCTION(ADDV, {}), - INIT_INSTRUCTION(SUBV, {}), - INIT_INSTRUCTION(MULV, {}), - INIT_INSTRUCTION(DIVV, {}), - INIT_INSTRUCTION(CMP, {}), - INIT_INSTRUCTION(CEV, {}), + INIT_INSTRUCTION( + MUL, + { + s1 = s1 * s2; + (void)this; + }), + + INIT_INSTRUCTION( + QUOT, + { + s1 = s1 / s2; + (void)this; + }), + + INIT_INSTRUCTION( + REM, + { + s1 = s1 % s2; + (void)this; + }), + + INIT_INSTRUCTION( + SFTR, + { + s1 = s1 >> s2; + (void)this; + }), + + INIT_INSTRUCTION( + SFTL, + { + s1 = s1 << s2; + (void)this; + }), + + INIT_INSTRUCTION( + AND, + { + s1 = s1 & s2; + (void)this; + }), + + INIT_INSTRUCTION( + OR, + { + s1 = s1 | s2; + (void)this; + }), + + INIT_INSTRUCTION( + NOT, + { + s1 = ~s1; + (void)s2; + (void)this; + }), + + INIT_INSTRUCTION( + XOR, + { + s1 = s1 ^ s2; + (void)this; + }), + + INIT_INSTRUCTION( + ADDV, + { + (void)s2; + (void)s1; + (void)this; + }), + + INIT_INSTRUCTION( + SUBV, + { + (void)s2; + (void)s1; + (void)this; + }), + + INIT_INSTRUCTION( + MULV, + { + (void)s2; + (void)s1; + (void)this; + }), + + INIT_INSTRUCTION( + DIVV, + { + (void)s2; + (void)s1; + (void)this; + }), + + INIT_INSTRUCTION( + CMP, + { + (s1 > s2) ? this->set_condition(GT, true) + : this->set_condition(GT, false); + (s1 == s2) ? this->set_condition(EQ, true) + : this->set_condition(EQ, false); + }), + + INIT_INSTRUCTION( + CEV, + { + (void)s2; + (void)s1; + (void)this; + }), /* I type instructions */ INIT_INSTRUCTION(LOAD, {}), + INIT_INSTRUCTION(LOADV, {}), + INIT_INSTRUCTION(ADDI, {}), + INIT_INSTRUCTION(SUBI, {}), + INIT_INSTRUCTION(SFTRI, {}), + INIT_INSTRUCTION(SFTL, {}), + INIT_INSTRUCTION(ANDI, {}), + INIT_INSTRUCTION(ORI, {}), + INIT_INSTRUCTION(XORI, {}), + INIT_INSTRUCTION(STORE, {}), + INIT_INSTRUCTION(STOREV, {}), /* J type instructions */ INIT_INSTRUCTION(JMP, {}), + INIT_INSTRUCTION(JRL, {}), + INIT_INSTRUCTION(JAL, {}), + INIT_INSTRUCTION(BEQ, {}), + INIT_INSTRUCTION(BGT, {}), + INIT_INSTRUCTION(BUF, {}), + INIT_INSTRUCTION(BOF, {}), + INIT_INSTRUCTION(PUSH, {}), + INIT_INSTRUCTION(POP, {}), /* NOP */ - INIT_INSTRUCTION(NOP, (void)s2; (void)s1;), + INIT_INSTRUCTION( + NOP, + { + (void)s2; + (void)s1; + (void)this; + }), }; } InstrDTO *EX::advance(Response p) { return nullptr; } - -void EX::overflow_guard(signed int a, signed int b) -{ - if (a >= 0 && b >= 0 && (a > MAX_INT - b)) { - this->set_condition(OF, true); - this->set_condition(UF, false); - } else if (a < 0 && b < 0 && (a < (-MAX_INT) - 1 - b)) { - this->set_condition(OF, false); - this->set_condition(UF, true); - } else { - this->set_condition(OF, false); - this->set_condition(UF, false); - } -} |