122 lines
2.2 KiB
C++
122 lines
2.2 KiB
C++
#pragma once
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#include <cstdint>
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namespace matar {
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enum class Mode {
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/* M[4:0] in PSR */
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User = 0b10000,
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Fiq = 0b10001,
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Irq = 0b10010,
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Supervisor = 0b10011,
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Abort = 0b10111,
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Undefined = 0b11011,
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System = 0b11111,
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};
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enum class State {
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Arm = 0,
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Thumb = 1
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};
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enum class Condition {
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EQ = 0b0000,
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NE = 0b0001,
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CS = 0b0010,
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CC = 0b0011,
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MI = 0b0100,
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PL = 0b0101,
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VS = 0b0110,
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VC = 0b0111,
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HI = 0b1000,
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LS = 0b1001,
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GE = 0b1010,
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LT = 0b1011,
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GT = 0b1100,
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LE = 0b1101,
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AL = 0b1110
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};
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constexpr auto
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stringify(Condition cond) {
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#define CASE(cond) \
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case Condition::cond: \
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return #cond;
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switch (cond) {
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CASE(EQ)
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CASE(NE)
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CASE(CS)
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CASE(CC)
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CASE(MI)
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CASE(PL)
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CASE(VS)
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CASE(VC)
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CASE(HI)
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CASE(LS)
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CASE(GE)
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CASE(LT)
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CASE(GT)
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CASE(LE)
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case Condition::AL: {
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return "";
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}
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}
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#undef CASE
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return "";
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}
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class Psr {
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public:
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Psr() = default;
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Psr(uint32_t raw);
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uint32_t raw() const;
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void set_all(uint32_t raw);
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// Mode : [4:0]
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Mode mode() const;
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void set_mode(Mode mode);
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// State : [5]
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State state() const;
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void set_state(State state);
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#define GET_SET_NTH_BIT_FUNCTIONS(name) \
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bool name() const; \
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void set_##name(bool val);
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// FIQ disable : [6]
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GET_SET_NTH_BIT_FUNCTIONS(fiq_disabled)
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// IRQ disable : [7]
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GET_SET_NTH_BIT_FUNCTIONS(irq_disabled)
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// Reserved bits : [27:8]
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// Overflow flag : [28]
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GET_SET_NTH_BIT_FUNCTIONS(v)
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// Carry flag : [29]
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GET_SET_NTH_BIT_FUNCTIONS(c)
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// Zero flag : [30]
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GET_SET_NTH_BIT_FUNCTIONS(z)
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// Negative flag : [30]
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GET_SET_NTH_BIT_FUNCTIONS(n)
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#undef GET_SET_NTH_BIT_FUNCTIONS
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bool condition(Condition cond) const;
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private:
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static constexpr uint32_t PSR_CLEAR_RESERVED = 0xF00000FF;
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uint32_t psr;
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};
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}
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