56 lines
1.0 KiB
C++
56 lines
1.0 KiB
C++
#pragma once
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#include <cstdint>
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namespace matar {
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enum class ShiftType {
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LSL = 0b00,
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LSR = 0b01,
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ASR = 0b10,
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ROR = 0b11
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};
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constexpr auto
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stringify(ShiftType shift_type) {
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#define CASE(type) \
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case ShiftType::type: \
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return #type;
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switch (shift_type) {
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CASE(LSL)
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CASE(LSR)
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CASE(ASR)
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CASE(ROR)
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}
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#undef CASE
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return "";
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}
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struct ShiftData {
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ShiftType type;
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bool immediate;
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uint8_t operand;
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};
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struct Shift {
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uint8_t rm;
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ShiftData data;
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};
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uint32_t
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eval_shift(ShiftType shift_type, uint32_t value, uint32_t amount, bool& carry);
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uint32_t
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sub(uint32_t a, uint32_t b, bool& carry, bool& overflow);
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uint32_t
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add(uint32_t a, uint32_t b, bool& carry, bool& overflow, bool c = 0);
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uint32_t
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sbc(uint32_t a, uint32_t b, bool& carry, bool& overflow, bool c);
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uint8_t
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multiplier_array_cycles(uint32_t x, bool zeroes_only = false);
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}
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