mirror of
https://github.com/dingusdev/dingusppc.git
synced 2024-08-29 12:29:02 +00:00
630 lines
16 KiB
C++
630 lines
16 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-21 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef PPCEMU_H
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#define PPCEMU_H
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#include <devices/memctrl/memctrlbase.h>
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#include <endianswap.h>
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#include <cinttypes>
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#include <functional>
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#include <setjmp.h>
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#include <string>
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// Uncomment this to help debug the emulator further
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//#define EXHAUSTIVE_DEBUG 1
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// Uncomment this to have a more graceful approach to illegal opcodes
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//#define ILLEGAL_OP_SAFE 1
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// Uncomment this to use GCC built-in functions.
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#define USE_GCC_BUILTINS 1
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// Uncomment this to use Visual Studio built-in functions.
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//#define USE_VS_BUILTINS 1
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//#define CPU_PROFILING // enable CPU profiling
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enum endian_switch { big_end = 0, little_end = 1 };
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typedef void (*PPCOpcode)(void);
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union FPR_storage {
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double dbl64_r; // double floating-point representation
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uint64_t int64_r; // double integer representation
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};
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/**
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Except for the floating-point registers, all registers require
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32 bits for representation. Floating-point registers need 64 bits.
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gpr = General Purpose Register
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fpr = Floating Point (FP) Register
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cr = Condition Register
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tbr = Time Base Register
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fpscr = FP Status and Condition Register
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spr = Special Register
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msr = Machine State Register
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sr = Segment Register
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**/
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typedef struct struct_ppc_state {
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FPR_storage fpr[32];
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uint32_t pc; // Referred as the CIA in the PPC manual
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uint32_t gpr[32];
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uint32_t cr;
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uint32_t fpscr;
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uint32_t tbr[2];
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uint32_t spr[1024];
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uint32_t msr;
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uint32_t sr[16];
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bool reserve; // reserve bit used for lwarx and stcwx
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} SetPRS;
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extern SetPRS ppc_state;
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/** symbolic names for frequently used SPRs */
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enum SPR : int {
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MQ = 0,
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XER = 1,
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LR = 8,
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CTR = 9,
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DSISR = 18,
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DAR = 19,
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DEC = 22,
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SDR1 = 25,
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SRR0 = 26,
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SRR1 = 27,
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PVR = 287
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};
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/** symbolic names for frequently used SPRs */
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enum TBR : int { TBL = 0, TBU = 1 };
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/** symbolic names for common PPC processors */
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enum PPC_VER : uint32_t {
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MPC601 = 0x00010001,
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MPC603 = 0x00030001,
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MPC604 = 0x00040001,
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MPC603E = 0x00060101,
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MPC750 = 0x00080200
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};
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/**
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typedef struct struct_ppc64_state {
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FPR_storage fpr [32];
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uint64_t pc; //Referred as the CIA in the PPC manual
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uint64_t gpr [32];
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uint32_t cr;
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uint32_t fpscr;
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uint32_t tbr [2];
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uint64_t spr [1024];
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uint32_t msr;
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uint32_t sr [16];
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bool reserve; //reserve bit used for lwarx and stcwx
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} SetPRS64;
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extern SetPRS64 ppc_state64;
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**/
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/**
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Specific SPRS to be weary of:
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USER MODEL
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SPR 1 - XER
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SPR 8 - Link Register / Branch
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b0 - Summary Overflow
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b1 - Overflow
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b2 - Carry
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b25-31 - Number of bytes to transfer
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SPR 9 - Count
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SUPERVISOR MODEL
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19 is the Data Address Register
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22 is the Decrementer
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26, 27 are the Save and Restore Registers (SRR0, SRR1)
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272 - 275 are the SPRGs
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284 - 285 for writing to the TBR's.
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528 - 535 are the Instruction BAT registers
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536 - 543 are the Data BAT registers
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**/
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extern uint32_t opcode_value; // used for interpreting opcodes
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extern uint64_t timebase_counter; // used for storing time base value
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// Additional steps to prevent overflow?
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extern int32_t add_result;
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extern int32_t simult_result;
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extern uint32_t uiadd_result;
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extern uint32_t uimult_result;
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extern uint32_t crf_d;
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extern uint32_t crf_s;
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extern uint32_t reg_s;
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extern uint32_t reg_d;
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extern uint32_t reg_a;
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extern uint32_t reg_b;
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extern uint32_t reg_c;
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extern uint32_t xercon;
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extern uint32_t cmp_c;
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extern uint32_t crm;
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extern uint32_t br_bo;
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extern uint32_t br_bi;
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extern uint32_t rot_sh;
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extern uint32_t rot_mb;
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extern uint32_t rot_me;
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extern uint32_t uimm;
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extern uint32_t grab_sr;
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extern uint32_t grab_inb; // This is for grabbing the number of immediate bytes for loading and storing
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extern uint32_t ppc_to;
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extern int32_t simm;
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extern int32_t adr_li;
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extern int32_t br_bd;
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// Used for GP calcs
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extern uint32_t ppc_result_a;
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extern uint32_t ppc_result_b;
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extern uint32_t ppc_result_c;
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extern uint32_t ppc_result_d;
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// Used for FP calcs
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extern uint64_t ppc_result64_a;
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extern uint64_t ppc_result64_b;
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extern uint64_t ppc_result64_c;
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extern uint64_t ppc_result64_d;
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/* The precise end of a basic block. */
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enum class BB_end_kind {
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BB_NONE = 0, /* no basic block end is reached */
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BB_BRANCH = 1, /* a branch instruction is encountered */
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BB_EXCEPTION, /* an exception is occured */
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BB_RFI /* the rfi instruction is encountered */
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};
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enum CR_select : int32_t {
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CR0_field = (0xF << 28),
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CR1_field = (0xF << 24),
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};
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enum CRx_bit : uint32_t {
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CR_SO = 28,
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CR_EQ = 29,
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CR_GT = 30,
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CR_LT = 31 };
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enum CR1_bit : uint32_t {
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CR1_OX = 24,
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CR1_VX,
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CR1_FEX,
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CR1_FX,
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};
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enum FPSCR : uint32_t {
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RN = 0x3,
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NI = 0x4,
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XE = 0x8,
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ZE = 0x10,
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UE = 0x20,
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OE = 0x40,
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VE = 0x80,
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VXCVI = 0x100,
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VXSQRT = 0x200,
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VXSOFT = 0x400,
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FPRF = 0x1F000,
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FPCC_FUNAN = 0x10000,
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FPCC_NEG = 0x8000,
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FPCC_POS = 0x4000,
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FPCC_ZERO = 0x2000,
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FPCC_FPRCD = 0x1000,
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FI = 0x20000,
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FR = 0x40000,
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VXVC = 0x80000,
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VXIMZ = 0x100000,
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VXZDZ = 0x200000,
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VXIDI = 0x400000,
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VXISI = 0x800000,
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VXSNAN = 0x1000000,
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XX = 0x2000000,
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ZX = 0x4000000,
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UX = 0x8000000,
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OX = 0x10000000,
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VX = 0x20000000,
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FEX = 0x40000000,
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FX = 0x80000000
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};
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//for inf and nan checks
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enum FPOP : int {
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DIV = 0x12,
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SUB = 0x14,
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ADD = 0x15,
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MUL = 0x19,
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FMSUB = 0x1C,
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FMADD = 0x1D,
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FNMSUB = 0x1E,
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FNMADD = 0x1F,
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};
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/** PowerPC exception types. */
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enum class Except_Type {
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EXC_SYSTEM_RESET = 1,
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EXC_MACHINE_CHECK,
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EXC_DSI,
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EXC_ISI,
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EXC_EXT_INT,
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EXC_ALIGNMENT,
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EXC_PROGRAM,
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EXC_NO_FPU,
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EXC_DECR,
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EXC_SYSCALL = 12,
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EXC_TRACE = 13
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};
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/** Programm Exception subclasses. */
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enum Exc_Cause : uint32_t {
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FPU_OFF = 1 << (31 - 11),
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ILLEGAL_OP = 1 << (31 - 12),
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NOT_ALLOWED = 1 << (31 - 13),
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TRAP = 1 << (31 - 14),
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};
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// extern bool bb_end;
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extern BB_end_kind bb_kind;
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extern jmp_buf exc_env;
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extern bool grab_exception;
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extern bool grab_return;
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extern bool power_on;
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extern bool is_601; // For PowerPC 601 Emulation
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extern bool is_altivec; // For Altivec Emulation
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extern bool is_64bit; // For PowerPC G5 Emulation
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extern bool rc_flag; // Record flag
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extern bool oe_flag; // Overflow flag
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// Important Addressing Integers
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extern uint32_t ppc_cur_instruction;
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extern uint32_t ppc_effective_address;
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extern uint32_t ppc_next_instruction_address;
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// Profiling Stats
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#ifdef CPU_PROFILING
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extern uint64_t num_executed_instrs;
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extern uint64_t num_supervisor_instrs;
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extern uint64_t num_int_loads;
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extern uint64_t num_int_stores;
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extern uint64_t exceptions_processed;
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#endif
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// Function prototypes
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extern void ppc_cpu_init(MemCtrlBase* mem_ctrl, uint32_t cpu_version);
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extern void ppc_mmu_init(uint32_t cpu_version);
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[[noreturn]] void ppc_illegalop();
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[[noreturn]] void ppc_fpu_off();
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//void ppc_opcode4();
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void ppc_opcode16();
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void ppc_opcode18();
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void ppc_opcode19();
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void ppc_opcode31();
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void ppc_opcode59();
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void ppc_opcode63();
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void initialize_ppc_opcode_tables();
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extern double fp_return_double(uint32_t reg);
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extern uint64_t fp_return_uint64(uint32_t reg);
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extern void ppc_grab_regsda();
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extern void ppc_grab_regsdb();
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extern void ppc_grab_regssa();
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extern void ppc_grab_regssb();
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extern void ppc_grab_regsdab();
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extern void ppc_grab_regssab();
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extern void ppc_grab_regsdasimm();
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extern void ppc_grab_regsdauimm();
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extern void ppc_grab_regsasimm();
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extern void ppc_grab_regssauimm();
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extern void ppc_store_result_regd();
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extern void ppc_store_result_rega();
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void ppc_changecrf0(uint32_t set_result);
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void ppc_fp_changecrf1();
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/* Exception handlers. */
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[[noreturn]] void ppc_exception_handler(Except_Type exception_type, uint32_t srr1_bits);
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[[noreturn]] void dbg_exception_handler(Except_Type exception_type, uint32_t srr1_bits);
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// MEMORY DECLARATIONS
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extern MemCtrlBase* mem_ctrl_instance;
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extern void add_ctx_sync_action(const std::function<void()> &);
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extern void do_ctx_sync(void);
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// The functions used by the PowerPC processor
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namespace dppc_interpreter {
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extern void ppc_bcctr();
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extern void ppc_bcctrl();
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extern void ppc_bclr();
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extern void ppc_bclrl();
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extern void ppc_crand();
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extern void ppc_crandc();
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extern void ppc_creqv();
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extern void ppc_crnand();
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extern void ppc_crnor();
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extern void ppc_cror();
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extern void ppc_crorc();
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extern void ppc_crxor();
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extern void ppc_isync();
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extern void ppc_add();
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extern void ppc_addc();
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extern void ppc_adde();
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extern void ppc_addme();
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extern void ppc_addze();
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extern void ppc_and();
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extern void ppc_andc();
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extern void ppc_cmp();
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extern void ppc_cmpl();
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extern void ppc_cntlzw();
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extern void ppc_dcbf();
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extern void ppc_dcbi();
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extern void ppc_dcbst();
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extern void ppc_dcbt();
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extern void ppc_dcbtst();
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extern void ppc_dcbz();
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extern void ppc_divw();
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extern void ppc_divwu();
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extern void ppc_eciwx();
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extern void ppc_ecowx();
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extern void ppc_eieio();
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extern void ppc_eqv();
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extern void ppc_extsb();
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extern void ppc_extsh();
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extern void ppc_icbi();
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extern void ppc_mftb();
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extern void ppc_lhzux();
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extern void ppc_lhzx();
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extern void ppc_lhaux();
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extern void ppc_lhax();
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extern void ppc_lhbrx();
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extern void ppc_lwarx();
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extern void ppc_lbzux();
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extern void ppc_lbzx();
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extern void ppc_lwbrx();
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extern void ppc_lwzux();
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extern void ppc_lwzx();
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extern void ppc_mcrxr();
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extern void ppc_mfcr();
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extern void ppc_mulhwu();
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extern void ppc_mulhw();
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extern void ppc_mullw();
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extern void ppc_nand();
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extern void ppc_neg();
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extern void ppc_nor();
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extern void ppc_or();
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extern void ppc_orc();
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extern void ppc_slw();
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extern void ppc_srw();
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extern void ppc_sraw();
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extern void ppc_srawi();
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extern void ppc_stbx();
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extern void ppc_stbux();
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extern void ppc_stfiwx();
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extern void ppc_sthx();
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extern void ppc_sthux();
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extern void ppc_sthbrx();
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extern void ppc_stwx();
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extern void ppc_stwcx();
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extern void ppc_stwux();
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extern void ppc_stwbrx();
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extern void ppc_subf();
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extern void ppc_subfc();
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extern void ppc_subfe();
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extern void ppc_subfme();
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extern void ppc_subfze();
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extern void ppc_sync();
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extern void ppc_tlbia();
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extern void ppc_tlbie();
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extern void ppc_tlbli();
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extern void ppc_tlbld();
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extern void ppc_tlbsync();
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extern void ppc_tw();
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extern void ppc_xor();
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extern void ppc_lswi();
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extern void ppc_lswx();
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extern void ppc_stswi();
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extern void ppc_stswx();
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extern void ppc_mfsr();
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extern void ppc_mfsrin();
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extern void ppc_mtsr();
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extern void ppc_mtsrin();
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extern void ppc_mcrf();
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extern void ppc_mtcrf();
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extern void ppc_mfmsr();
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extern void ppc_mfspr();
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extern void ppc_mtmsr();
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extern void ppc_mtspr();
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extern void ppc_mtfsb0();
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extern void ppc_mtfsb1();
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extern void ppc_mcrfs();
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extern void ppc_fmr();
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extern void ppc_mffs();
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extern void ppc_mtfsf();
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extern void ppc_mtfsfi();
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extern void ppc_addi();
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extern void ppc_addic();
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extern void ppc_addicdot();
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extern void ppc_addis();
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extern void ppc_andidot();
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extern void ppc_andisdot();
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extern void ppc_b();
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extern void ppc_ba();
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extern void ppc_bl();
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extern void ppc_bla();
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extern void ppc_bc();
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extern void ppc_bca();
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extern void ppc_bcl();
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extern void ppc_bcla();
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extern void ppc_cmpi();
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extern void ppc_cmpli();
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extern void ppc_lbz();
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extern void ppc_lbzu();
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extern void ppc_lha();
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extern void ppc_lhau();
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extern void ppc_lhz();
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extern void ppc_lhzu();
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extern void ppc_lwz();
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extern void ppc_lwzu();
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extern void ppc_lmw();
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extern void ppc_mulli();
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extern void ppc_ori();
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extern void ppc_oris();
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extern void ppc_rfi();
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extern void ppc_rlwimi();
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extern void ppc_rlwinm();
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extern void ppc_rlwnm();
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extern void ppc_sc();
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extern void ppc_stb();
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extern void ppc_stbu();
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extern void ppc_sth();
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extern void ppc_sthu();
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extern void ppc_stw();
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extern void ppc_stwu();
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extern void ppc_stmw();
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extern void ppc_subfic();
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extern void ppc_twi();
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extern void ppc_xori();
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extern void ppc_xoris();
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extern void ppc_lfs();
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extern void ppc_lfsu();
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extern void ppc_lfsx();
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extern void ppc_lfsux();
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extern void ppc_lfd();
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extern void ppc_lfdu();
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extern void ppc_lfdx();
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extern void ppc_lfdux();
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extern void ppc_stfs();
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extern void ppc_stfsu();
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extern void ppc_stfsx();
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extern void ppc_stfsux();
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extern void ppc_stfd();
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extern void ppc_stfdu();
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extern void ppc_stfdx();
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extern void ppc_stfdux();
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extern void ppc_fadd();
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extern void ppc_fsub();
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extern void ppc_fmul();
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extern void ppc_fdiv();
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extern void ppc_fadds();
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extern void ppc_fsubs();
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extern void ppc_fmuls();
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extern void ppc_fdivs();
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extern void ppc_fmadd();
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extern void ppc_fmsub();
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extern void ppc_fnmadd();
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extern void ppc_fnmsub();
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extern void ppc_fmadds();
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extern void ppc_fmsubs();
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extern void ppc_fnmadds();
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extern void ppc_fnmsubs();
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extern void ppc_fabs();
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extern void ppc_fnabs();
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extern void ppc_fneg();
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extern void ppc_fsel();
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extern void ppc_fres();
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extern void ppc_fsqrts();
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extern void ppc_fsqrt();
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extern void ppc_frsqrte();
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extern void ppc_frsp();
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extern void ppc_fctiw();
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extern void ppc_fctiwz();
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extern void ppc_fcmpo();
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extern void ppc_fcmpu();
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// Power-specific instructions
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extern void power_abs();
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extern void power_clcs();
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extern void power_div();
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extern void power_divs();
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extern void power_doz();
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extern void power_dozi();
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extern void power_lscbx();
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extern void power_maskg();
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extern void power_maskir();
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extern void power_mul();
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extern void power_nabs();
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extern void power_rlmi();
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extern void power_rrib();
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extern void power_sle();
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extern void power_sleq();
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extern void power_sliq();
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extern void power_slliq();
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extern void power_sllq();
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extern void power_slq();
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extern void power_sraiq();
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extern void power_sraq();
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extern void power_sre();
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extern void power_srea();
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extern void power_sreq();
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extern void power_sriq();
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extern void power_srliq();
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extern void power_srlq();
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extern void power_srq();
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} // namespace dppc_interpreter
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// AltiVec instructions
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// 64-bit instructions
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// G5+ instructions
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extern void ppc_main_opcode(void);
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extern void ppc_exec(void);
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extern void ppc_exec_single(void);
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extern void ppc_exec_until(uint32_t goal_addr);
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extern void ppc_exec_dbg(uint32_t start_addr, uint32_t size);
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/* debugging support API */
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void print_fprs(void); /* print content of the floating-point registers */
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uint64_t get_reg(std::string& reg_name); /* get content of the register reg_name */
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void set_reg(std::string& reg_name, uint64_t val); /* set reg_name to val */
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#endif /* PPCEMU_H */
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