114 lines
3.0 KiB
C++
114 lines
3.0 KiB
C++
#pragma once
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#include <ircolib/types.hpp>
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#include <capstone/capstone.h>
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#include <xbyak/xbyak.h>
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#include <array>
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namespace weee::core {
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struct mem;
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struct broadway {
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broadway();
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void set_pc(ircolib::u32);
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void run(mem &);
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private:
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ircolib::u32 fetch(mem &);
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void print_disasm(ircolib::u32);
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void execute(ircolib::u32, mem &);
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bool disasm_available = true;
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ircolib::u32 pc = 0, lr = 0, ctr = 0, cr = 0, srr0 = 0, fpscr = 0, msr = 0;
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union {
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struct {
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unsigned bytecount : 7;
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unsigned : 22;
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unsigned ca : 1;
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unsigned ov : 1;
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unsigned so : 1;
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};
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ircolib::u32 raw;
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} xer;
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void set_cr(ircolib::u8 value, ircolib::u8 index) {
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cr &= ~(0xffff << index * 4);
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cr |= (value << index * 4);
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}
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bool get_cr_bit(ircolib::u8 index, ircolib::u8 bit) { return (cr >> index * 4) & (1 << (4 - bit)); }
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// bat registers indexes
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static constexpr std::size_t BAT_LOWER_OFFSET = 0;
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static constexpr std::size_t BAT_UPPER_OFFSET = 8;
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std::array<ircolib::u32, 16> ibat, dbat;
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std::array<ircolib::u32, 32> gpr{};
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struct Fgr {
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ircolib::u64 ps0, ps1;
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};
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std::array<Fgr, 32> fgrs{};
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// ircolib::u32 const_gpr_lookup{};
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csh capstone;
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// Xbyak::CodeGenerator code;
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// instructions
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void decode_special1(ircolib::u32, mem &);
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void decode_special2(ircolib::u32, mem &);
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void decode_special3(ircolib::u32, mem &);
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void branch(bool, bool, ircolib::u32);
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bool test_cond_and_ctr(ircolib::u32);
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void andi(ircolib::u32);
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void add(ircolib::u32);
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void addis(ircolib::u32);
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void addi(ircolib::u32);
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void ori(ircolib::u32);
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void oris(ircolib::u32);
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void bx(ircolib::u32);
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void bcx(ircolib::u32);
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void mftspr(bool, ircolib::u32);
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void stw(ircolib::u32, mem &);
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void stwu(ircolib::u32, mem &);
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void stbu(ircolib::u32, mem &);
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void sth(ircolib::u32, mem &);
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void lwz(ircolib::u32, mem &);
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void lfd(ircolib::u32, mem &);
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void bclrx(ircolib::u32);
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void cmpi(ircolib::u32);
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void cmpli(ircolib::u32);
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void cmp(ircolib::u32);
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void cmpl(ircolib::u32);
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void rlwinm(ircolib::u32);
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void lwzu(ircolib::u32, mem &);
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void rfi(ircolib::u32);
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void mtfsf(ircolib::u32);
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void mtfsb1(ircolib::u32);
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void mtfsb0(ircolib::u32);
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void mfmsr(ircolib::u32);
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void nand(ircolib::u32);
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void subf(ircolib::u32);
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void or (ircolib::u32);
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inline void cr0_update(bool condition, ircolib::s32 result) {
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if (condition) {
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const bool b0 = result < 0;
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const bool b1 = result >= 0;
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const bool b2 = result == 0;
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const bool b3 = xer.so;
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set_cr((b0 << 3) | (b1 << 2) | (b2 << 1) | (b3 << 0), 0);
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}
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}
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inline void cr1_update(bool condition) {
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if (condition) {
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const ircolib::u8 field = (fpscr >> 28) & 0xf;
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set_cr(field, 1);
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}
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}
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};
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} // namespace weee::core
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