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tests: complete disassembler tests

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Signed-off-by: Amneesh Singh <natto@weirdnatto.in>
This commit is contained in:
Amneesh Singh
2023-09-17 09:50:32 +05:30
parent be7deb349a
commit dd9dd5f116
17 changed files with 389 additions and 90 deletions
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16
src/cpu/utility.cc
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@@ -69,6 +69,8 @@ operator<<(std::ostream& os, const OpCode opcode) {
uint32_t
eval_shift(ShiftType shift_type, uint32_t value, uint8_t amount, bool& carry) {
uint32_t eval = 0;
switch (shift_type) {
case ShiftType::LSL:
@@ -77,7 +79,8 @@ eval_shift(ShiftType shift_type, uint32_t value, uint8_t amount, bool& carry) {
else if (amount > 32)
carry = 0;
return value << amount;
eval = value << amount;
break;
case ShiftType::LSR:
if (amount > 0 && amount <= 32)
@@ -87,7 +90,8 @@ eval_shift(ShiftType shift_type, uint32_t value, uint8_t amount, bool& carry) {
else
carry = get_bit(value, 31);
return value >> amount;
eval = value >> amount;
break;
case ShiftType::ASR:
if (amount > 0 && amount <= 32)
carry = get_bit(value, amount - 1);
@@ -95,17 +99,21 @@ eval_shift(ShiftType shift_type, uint32_t value, uint8_t amount, bool& carry) {
carry = get_bit(value, 31);
return static_cast<int32_t>(value) >> amount;
break;
case ShiftType::ROR:
if (amount == 0) {
bool old_carry = carry;
carry = get_bit(value, 0);
return (value >> 1) | (old_carry << 31);
eval = (value >> 1) | (old_carry << 31);
} else {
carry = get_bit(value, (amount % 32 + 31) % 32);
return std::rotr(value, amount);
eval = std::rotr(value, amount);
}
break;
}
return eval;
}
std::ostream&