Panda3DS/include/arm_defs.hpp

#pragma once
#include <cstdint>

// Status register definitions
namespace CPSR {
    enum : std::uint32_t {
        // Privilege modes
        UserMode = 16,
        FIQMode = 17,
        IRQMode = 18,
        SVCMode = 19,
        AbortMode = 23,
        UndefMode = 27,
        SystemMode = 31,

        // CPSR flag fields
        Thumb = 1 << 5,
        FIQDisable = 1 << 6,
        IRQDisable = 1 << 7,
        StickyOverflow = 1 << 27,
        Overflow = 1 << 28,
        Carry = 1 << 29,
        Zero = 1 << 30,
        Sign = 1U << 31U
	};
}

namespace FPSCR {
    // FPSCR Flags
    enum : std::uint32_t {
        Sign = 1U << 31U, // Negative condition flag
        Zero = 1 << 30,   // Zero condition flag
        Carry = 1 << 29,   // Carry condition flag
        Overflow = 1 << 28,   // Overflow condition flag

        QC = 1 << 27,   // Cumulative saturation bit
        AHP = 1 << 26,   // Alternative half-precision control bit
        DefaultNan = 1 << 25,   // Default NaN mode control bit
        FlushToZero = 1 << 24,   // Flush abnormals to 0 control bit
        RmodeMask = 3 << 22,   // Rounding Mode bit mask
        StrideMask = 3 << 20,   // Vector stride bit mask
        LengthMask = 7 << 16,   // Vector length bit mask

        IDE = 1 << 15, // Input Denormal exception trap enable.
        IXE = 1 << 12, // Inexact exception trap enable
        UFE = 1 << 11, // Undeflow exception trap enable
        OFE = 1 << 10, // Overflow exception trap enable
        DZE = 1 << 9,  // Division by Zero exception trap enable
        IOE = 1 << 8,  // Invalid Operation exception trap enable

        IDC = 1 << 7, // Input Denormal cumulative exception bit
        IXC = 1 << 4, // Inexact cumulative exception bit
        UFC = 1 << 3, // Undeflow cumulative exception bit
        OFC = 1 << 2, // Overflow cumulative exception bit
        DZC = 1 << 1, // Division by Zero cumulative exception bit
        IOC = 1 << 0, // Invalid Operation cumulative exception bit

        // VFP rounding modes
        RoundNearest = 0 << 22,
        RoundPlusInf = 1 << 22,
        RoundMinusInf = 2 << 22,
        RoundToZero = 3 << 22,

        // Default FPSCR value for threads
        ThreadDefault = DefaultNan | FlushToZero | RoundToZero,
        MainThreadDefault = ThreadDefault | IXC
    };
}