| /* id32_cpu.c: Interdata 32b CPU simulator | |
| Copyright (c) 2000-2008, Robert M. Supnik | |
| Permission is hereby granted, free of charge, to any person obtaining a | |
| copy of this software and associated documentation files (the "Software"), | |
| to deal in the Software without restriction, including without limitation | |
| the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
| and/or sell copies of the Software, and to permit persons to whom the | |
| Software is furnished to do so, subject to the following conditions: | |
| The above copyright notice and this permission notice shall be included in | |
| all copies or substantial portions of the Software. | |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
| ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER | |
| IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
| CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
| Except as contained in this notice, the name of Robert M Supnik shall not be | |
| used in advertising or otherwise to promote the sale, use or other dealings | |
| in this Software without prior written authorization from Robert M Supnik. | |
| cpu Interdata 32b CPU | |
| 28-Apr-07 RMS Removed clock initialization | |
| 27-Oct-06 RMS Added idle support | |
| Removed separate PASLA clock | |
| 09-Mar-06 RMS Added 8 register bank support for 8/32 | |
| 06-Feb-06 RMS Fixed bug in DH (Mark Hittinger) | |
| 22-Sep-05 RMS Fixed declarations (Sterling Garwood) | |
| 16-Aug-05 RMS Fixed C++ declaration and cast problems | |
| 10-Mar-05 RMS Fixed bug in initial memory allocation | |
| RMS Fixed bug in show history routine (Mark Hittinger) | |
| RMS Revised examine/deposit to do words rather than bytes | |
| 18-Feb-05 RMS Fixed branches to mask new PC (Greg Johnson) | |
| 06-Nov-04 RMS Added =n to SHOW HISTORY | |
| 25-Jan-04 RMS Revised for device debug support | |
| 31-Dec-03 RMS Fixed bug in cpu_set_hist | |
| 22-Sep-03 RMS Added additional instruction decode types | |
| Added instruction history | |
| The register state for an Interdata 32b CPU is: | |
| REG[0:F][2]<0:31> general register sets | |
| F[0:7]<0:31> single precision floating point registers | |
| D[0:7]<0:63> double precision floating point registers | |
| PSW<0:63> processor status word, including | |
| STAT<0:11> status flags | |
| CC<0:3> condition codes | |
| PC<0:31> program counter | |
| int_req[n]<0:31> interrupt requests | |
| int_enb[n]<0:31> interrupt enables | |
| The Interdata 32b systems have seven instruction formats: register to | |
| register, short format, register and memory (three formats), and register | |
| and immediate (two formats). The formats are: | |
| 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| | op | R1 | R2 | register-register | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| | op | R1 | N | short format | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| | op | R1 | RX | register-memory 1 | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ (absolute 14b) | |
| | 0| 0| address | | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| | op | R1 | RX | register-memory 2 | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ (relative) | |
| | 1| address | | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| | op | R1 | RX | register-memory 3 | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ (double index) | |
| | 0| 1| 0| 0| RX2 | address hi | | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| | address lo | | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| | op | R1 | RX | register-immediate 1 | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| | immediate | | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| | op | R1 | RX | register-immediate 2 | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| | immediate hi | | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| | immediate lo | | |
| +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | |
| For register-memory 1 and register-immediate 1 and 2 an instructions, an | |
| effective address is calculated as follows: | |
| effective addr = address + RX (if RX > 0) | |
| For register-memory 2, an effective address is calculated as follows: | |
| effective addr = address + PC + RX (if RX > 0) | |
| For register-memory 3, an effective address is calculated as follows: | |
| effective addr = address + RX (if RX > 0) + RX2 (if RX2 > 0) | |
| Register-memory instructions can access an address space of 16M bytes. | |
| This routine is the instruction decode routine for the Interdata CPU. | |
| It is called from the simulator control program to execute | |
| instructions in simulated memory, starting at the simulated PC. | |
| It runs until 'reason' is set non-zero. | |
| General notes: | |
| 1. Reasons to stop. The simulator can be stopped by: | |
| HALT instruction | |
| breakpoint encountered | |
| wait state and no I/O outstanding | |
| invalid instruction | |
| I/O error in I/O simulator | |
| 2. Interrupts. Each device has an interrupt armed flag, an interrupt | |
| request flag, and an interrupt enabled flag. To facilitate evaluation, | |
| all interrupt requests are kept in int_req, and all enables in int_enb. | |
| Interrupt armed flags are local to devices. If external interrupts are | |
| enabled in the PSW, and a request is pending, an interrupt occurs. | |
| 3. Non-existent memory. On the Interdata 32b, reads to non-existent | |
| memory return zero, and writes are ignored. In the simulator, the | |
| largest possible memory is instantiated and initialized to zero. | |
| Thus, only writes need be checked against actual memory size. | |
| 4. Adding I/O devices. These modules must be modified: | |
| id_defs.h add device interrupt definitions | |
| id32_sys.c add sim_devices table entry | |
| */ | |
| #include "id_defs.h" | |
| #include <setjmp.h> | |
| #define PCQ_SIZE 64 /* must be 2**n */ | |
| #define PCQ_MASK (PCQ_SIZE - 1) | |
| #define PCQ_ENTRY pcq[pcq_p = (pcq_p - 1) & PCQ_MASK] = oPC | |
| #define VAMASK VAMASK32 | |
| #define NRSETS 8 /* up to 8 reg sets */ | |
| #define PSW_MASK PSW_x32 | |
| #define ABORT(val) longjmp (save_env, (val)) | |
| #define MPRO (-1) | |
| #define UNIT_V_MSIZE (UNIT_V_UF + 0) /* dummy mask */ | |
| #define UNIT_V_DPFP (UNIT_V_UF + 1) | |
| #define UNIT_V_832 (UNIT_V_UF + 2) | |
| #define UNIT_V_8RS (UNIT_V_UF + 3) | |
| #define UNIT_MSIZE (1 << UNIT_V_MSIZE) | |
| #define UNIT_DPFP (1 << UNIT_V_DPFP) | |
| #define UNIT_832 (1 << UNIT_V_832) | |
| #define UNIT_8RS (1 << UNIT_V_8RS) | |
| #define UNIT_TYPE (UNIT_DPFP | UNIT_832) | |
| #define HIST_PC 0x40000000 | |
| #define HIST_MIN 64 | |
| #define HIST_MAX 65536 | |
| typedef struct { | |
| uint32 pc; | |
| uint32 ir1; | |
| uint32 ir2; | |
| uint32 ir3; | |
| uint32 r1; | |
| uint32 ea; | |
| uint32 opnd; | |
| } InstHistory; | |
| #define PSW_GETREG(x) (((x) >> PSW_V_REG) & psw_reg_mask) | |
| #define SEXT32(x) (((x) & SIGN32)? ((int32) ((x) | ~0x7FFFFFFF)): \ | |
| ((int32) ((x) & 0x7FFFFFFF))) | |
| #define SEXT16(x) (((x) & SIGN16)? ((int32) ((x) | ~0x7FFF)): \ | |
| ((int32) ((x) & 0x7FFF))) | |
| #define SEXT15(x) (((x) & 0x4000)? ((int32) ((x) | ~0x3FFF)): \ | |
| ((int32) ((x) & 0x3FFF))) | |
| #define CC_GL_16(x) if ((x) & SIGN16) \ | |
| cc = CC_L; \ | |
| else if (x) \ | |
| cc = CC_G; \ | |
| else cc = 0 | |
| #define CC_GL_32(x) if ((x) & SIGN32) \ | |
| cc = CC_L; \ | |
| else if (x) \ | |
| cc = CC_G; \ | |
| else cc = 0 | |
| #define BUILD_PSW(x) (((PSW & ~CC_MASK) | (x)) & PSW_MASK) | |
| #define NEG(x) ((~(x) + 1) & DMASK32) | |
| #define ABS(x) (((x) & SIGN32)? NEG (x): (x)) | |
| #define DNEG(x,y) y = NEG (y); \ | |
| x = (~(x) + (y == 0)) & DMASK32 | |
| /* Logging */ | |
| #define LOG_CPU_I 0x0001 /* intr/exception */ | |
| #define LOG_CPU_C 0x0002 /* context change */ | |
| uint32 GREG[16 * NRSETS] = { 0 }; /* general registers */ | |
| uint32 *M = NULL; /* memory */ | |
| uint32 *R = &GREG[0]; /* working reg set */ | |
| uint32 F[8] = { 0 }; /* sp fp registers */ | |
| dpr_t D[8] = { {0} }; /* dp fp registers */ | |
| uint32 PSW = 0; /* processor status word */ | |
| uint32 PC = 0; /* program counter */ | |
| uint32 oPC = 0; /* PC at inst start */ | |
| uint32 SR = 0; /* switch register */ | |
| uint32 DR = 0; /* display register */ | |
| uint32 DRX = 0; /* display extension */ | |
| uint32 drmod = 0; /* mode */ | |
| uint32 srpos = 0; /* switch register pos */ | |
| uint32 drpos = 0; /* display register pos */ | |
| uint32 mac_reg[MAC_LNT] = { 0 }; /* mac registers */ | |
| uint32 mac_sta = 0; /* mac status */ | |
| uint32 int_req[INTSZ] = { 0 }; /* interrupt requests */ | |
| uint32 int_enb[INTSZ] = { 0 }; /* interrupt enables */ | |
| uint32 qevent = 0; /* events */ | |
| uint32 stop_inst = 0; /* stop on ill inst */ | |
| uint32 stop_wait = 0; /* stop on wait */ | |
| uint32 pcq[PCQ_SIZE] = { 0 }; /* PC queue */ | |
| int32 pcq_p = 0; /* PC queue ptr */ | |
| REG *pcq_r = NULL; /* PC queue reg ptr */ | |
| uint32 dec_flgs = 0; /* decode flags */ | |
| uint32 fp_in_hwre = 0; /* ucode vs hwre fp */ | |
| uint32 pawidth = PAWIDTH32; /* addr mask */ | |
| uint32 hst_p = 0; /* history pointer */ | |
| uint32 hst_lnt = 0; /* history length */ | |
| uint32 psw_reg_mask = 1; /* PSW reg mask */ | |
| InstHistory *hst = NULL; /* instruction history */ | |
| jmp_buf save_env; /* abort handler */ | |
| struct BlockIO blk_io; /* block I/O status */ | |
| uint32 (*dev_tab[DEVNO])(uint32 dev, uint32 op, uint32 datout) = { NULL }; | |
| uint32 ReadB (uint32 loc, uint32 rel); | |
| uint32 ReadH (uint32 loc, uint32 rel); | |
| void WriteB (uint32 loc, uint32 val, uint32 rel); | |
| void WriteH (uint32 loc, uint32 val, uint32 rel); | |
| uint32 RelocT (uint32 va, uint32 base, uint32 rel, uint32 *pa); | |
| uint32 int_auto (uint32 dev, uint32 cc); | |
| uint32 addtoq (uint32 ea, uint32 val, uint32 flg); | |
| uint32 remfmq (uint32 ea, uint32 r1, uint32 flg); | |
| uint32 exception (uint32 loc, uint32 cc, uint32 flg); | |
| uint32 newPSW (uint32 val); | |
| uint32 testsysq (uint32 cc); | |
| uint32 display (uint32 dev, uint32 op, uint32 dat); | |
| t_stat cpu_ex (t_value *vptr, t_addr addr, UNIT *uptr, int32 sw); | |
| t_stat cpu_dep (t_value val, t_addr addr, UNIT *uptr, int32 sw); | |
| t_stat cpu_reset (DEVICE *dptr); | |
| t_stat cpu_set_size (UNIT *uptr, int32 val, char *cptr, void *desc); | |
| t_stat cpu_set_consint (UNIT *uptr, int32 val, char *cptr, void *desc); | |
| t_stat cpu_set_hist (UNIT *uptr, int32 val, char *cptr, void *desc); | |
| t_stat cpu_show_hist (FILE *st, UNIT *uptr, int32 val, void *desc); | |
| void set_r_display (uint32 *rbase); | |
| extern t_bool devtab_init (void); | |
| extern void int_eval (void); | |
| extern uint32 int_getdev (void); | |
| extern void sch_cycle (uint32 ch); | |
| extern t_bool sch_blk (uint32 dev); | |
| extern uint32 f_l (uint32 op, uint32 r1, uint32 r2, uint32 ea); | |
| extern uint32 f_c (uint32 op, uint32 r1, uint32 r2, uint32 ea); | |
| extern uint32 f_as (uint32 op, uint32 r1, uint32 r2, uint32 ea); | |
| extern uint32 f_m (uint32 op, uint32 r1, uint32 r2, uint32 ea); | |
| extern uint32 f_d (uint32 op, uint32 r1, uint32 r2, uint32 ea); | |
| extern uint32 f_fix32 (uint32 op, uint32 r1, uint32 r2); | |
| extern uint32 f_flt32 (uint32 op, uint32 r1, uint32 r2); | |
| /* Instruction decoding table */ | |
| const uint16 decrom[256] = { | |
| 0, /* 00 */ | |
| OP_RR, /* BALR */ | |
| OP_RR, /* BTCR */ | |
| OP_RR, /* BFCR */ | |
| OP_RR, /* NR */ | |
| OP_RR, /* CLR */ | |
| OP_RR, /* OR */ | |
| OP_RR, /* XR */ | |
| OP_RR, /* LR */ | |
| OP_RR, /* CR */ | |
| OP_RR, /* AR */ | |
| OP_RR, /* SR */ | |
| OP_RR, /* MHR */ | |
| OP_RR, /* DHR */ | |
| 0, 0, /* 0E:0F */ | |
| OP_NO, /* SRLS */ | |
| OP_NO, /* SLLS */ | |
| OP_RR, /* CHVR */ | |
| 0, 0, 0, 0, 0, /* 13:17 */ | |
| OP_RR | OP_PRV, /* LPSWR */ | |
| 0, 0, 0, /* 19:1B */ | |
| OP_RR, /* MR */ | |
| OP_RR, /* DR */ | |
| 0, 0, /* 1E:1F */ | |
| OP_NO, /* BTBS */ | |
| OP_NO, /* BTFS */ | |
| OP_NO, /* BFBS */ | |
| OP_NO, /* BFFS */ | |
| OP_NO, /* LIS */ | |
| OP_NO, /* LCS */ | |
| OP_NO, /* AIS */ | |
| OP_NO, /* SIS */ | |
| OP_NO, /* LER */ | |
| OP_NO, /* CER */ | |
| OP_NO, /* AER */ | |
| OP_NO, /* SER */ | |
| OP_NO, /* MER */ | |
| OP_NO, /* DER */ | |
| OP_NO, /* FXR */ | |
| OP_NO, /* FLR */ | |
| 0, /* MPBSR - 8/32C */ | |
| 0, /* 31 */ | |
| 0, /* PBR - 8/32C */ | |
| 0, /* 33 */ | |
| OP_RR, /* EXHR */ | |
| 0, 0, 0, /* 35:37 */ | |
| OP_NO | OP_DPF, /* LDR */ | |
| OP_NO | OP_DPF, /* CDR */ | |
| OP_NO | OP_DPF, /* ADR */ | |
| OP_NO | OP_DPF, /* SDR */ | |
| OP_NO | OP_DPF, /* MDR */ | |
| OP_NO | OP_DPF, /* DDR */ | |
| OP_NO | OP_DPF, /* FXDR */ | |
| OP_NO | OP_DPF, /* FLDR */ | |
| OP_RX, /* STH */ | |
| OP_RX, /* BAL */ | |
| OP_RX, /* BTC */ | |
| OP_RX, /* BFC */ | |
| OP_RXH, /* NH */ | |
| OP_RXH, /* CLH */ | |
| OP_RXH, /* OH */ | |
| OP_RXH, /* XH */ | |
| OP_RXH, /* LH */ | |
| OP_RXH, /* CH */ | |
| OP_RXH, /* AH */ | |
| OP_RXH, /* SH */ | |
| OP_RXH, /* MH */ | |
| OP_RXH, /* DH */ | |
| 0, 0, /* 4E:4F */ | |
| OP_RX, /* ST */ | |
| OP_RXF, /* AM */ | |
| 0, 0, /* 52:53 */ | |
| OP_RXF, /* N */ | |
| OP_RXF, /* CL */ | |
| OP_RXF, /* O */ | |
| OP_RXF, /* X */ | |
| OP_RXF, /* L */ | |
| OP_RXF, /* C */ | |
| OP_RXF, /* A */ | |
| OP_RXF, /* S */ | |
| OP_RXF, /* M */ | |
| OP_RXF, /* D */ | |
| OP_RXH, /* CRC12 */ | |
| OP_RXH, /* CRC16 */ | |
| OP_RX, /* STE */ | |
| OP_RXH, /* AHM */ | |
| 0, /* PB - 8/32C */ | |
| OP_RX, /* LRA */ | |
| OP_RX, /* ATL */ | |
| OP_RX, /* ABL */ | |
| OP_RX, /* RTL */ | |
| OP_RX, /* RBL */ | |
| OP_RX, /* LE */ | |
| OP_RX, /* CE */ | |
| OP_RX, /* AE */ | |
| OP_RX, /* SE */ | |
| OP_RX, /* ME */ | |
| OP_RX, /* DE */ | |
| 0, 0, /* 6E:6F */ | |
| OP_RX | OP_DPF, /* STD */ | |
| OP_RX, /* SME */ | |
| OP_RX, /* LME */ | |
| OP_RXH, /* LHL */ | |
| OP_RX, /* TBT */ | |
| OP_RX, /* SBT */ | |
| OP_RX, /* RBT */ | |
| OP_RX, /* CBT */ | |
| OP_RX | OP_DPF, /* LD */ | |
| OP_RX | OP_DPF, /* CD */ | |
| OP_RX | OP_DPF, /* AD */ | |
| OP_RX | OP_DPF, /* SD */ | |
| OP_RX | OP_DPF, /* MD */ | |
| OP_RX | OP_DPF, /* DD */ | |
| OP_RX | OP_DPF, /* STMD */ | |
| OP_RX | OP_DPF, /* LMD */ | |
| 0, 0, 0, 0, 0, 0, 0, 0, /* 80:8F */ | |
| 0, 0, 0, 0, 0, 0, 0, 0, | |
| OP_NO, /* SRHLS */ | |
| OP_NO, /* SLHLS */ | |
| OP_NO, /* STBR */ | |
| OP_RR, /* LDBR */ | |
| OP_RR, /* EXBR */ | |
| OP_NO | OP_PRV, /* EPSR */ | |
| OP_RR | OP_PRV, /* WBR */ | |
| OP_RR | OP_PRV, /* RBR */ | |
| OP_RR | OP_PRV, /* WHR */ | |
| OP_RR | OP_PRV, /* RHR */ | |
| OP_RR | OP_PRV, /* WDR */ | |
| OP_RR | OP_PRV, /* RDR */ | |
| 0, /* 9C */ | |
| OP_RR | OP_PRV, /* SSR */ | |
| OP_RR | OP_PRV, /* OCR */ | |
| 0, /* 9F */ | |
| 0, 0, 0, 0, 0, 0, 0, 0, /* A0:AF */ | |
| 0, 0, 0, 0, 0, 0, 0, 0, | |
| 0, 0, 0, 0, 0, 0, 0, 0, /* B0:BF */ | |
| 0, 0, 0, 0, 0, 0, 0, 0, | |
| OP_RX, /* BXH */ | |
| OP_RX, /* BXLE */ | |
| OP_RXF | OP_PRV, /* LPSW */ | |
| OP_RI1, /* THI */ | |
| OP_RI1, /* NHI */ | |
| OP_RI1, /* CLHI */ | |
| OP_RI1, /* OHI */ | |
| OP_RI1, /* XHI */ | |
| OP_RI1, /* LHI */ | |
| OP_RI1, /* CHI */ | |
| OP_RI1, /* AHI */ | |
| OP_RI1, /* SHI */ | |
| OP_RI1, /* SRHL */ | |
| OP_RI1, /* SLHL */ | |
| OP_RI1, /* SRHA */ | |
| OP_RI1, /* SLHA */ | |
| OP_RX, /* STM */ | |
| OP_RX, /* LM */ | |
| OP_RX, /* STB */ | |
| OP_RXB, /* LDB */ | |
| OP_RXB, /* CLB */ | |
| OP_RX | OP_PRV, /* AL */ | |
| OP_RXF | OP_PRV, /* WB */ | |
| OP_RXF | OP_PRV, /* RB */ | |
| OP_RX | OP_PRV, /* WH */ | |
| OP_RX | OP_PRV, /* RH */ | |
| OP_RX | OP_PRV, /* WD */ | |
| OP_RX | OP_PRV, /* RD */ | |
| 0, /* DC */ | |
| OP_RX | OP_PRV, /* SS */ | |
| OP_RX | OP_PRV, /* OC */ | |
| 0, /* DF */ | |
| OP_RXH, /* TS */ | |
| OP_RX, /* SVC */ | |
| OP_RI1 | OP_PRV, /* SINT */ | |
| OP_RXH | OP_PRV, /* SCP */ | |
| 0, 0, /* E4:E5 */ | |
| OP_RX, /* LA */ | |
| OP_RXF, /* TLATE */ | |
| 0, 0, /* E8:E9 */ | |
| OP_RI1, /* RRL */ | |
| OP_RI1, /* RLL */ | |
| OP_RI1, /* SRL */ | |
| OP_RI1, /* SLL */ | |
| OP_RI1, /* SRA */ | |
| OP_RI1, /* SLA */ | |
| 0, 0, 0, /* F0:F2 */ | |
| OP_RI2, /* TI */ | |
| OP_RI2, /* NI */ | |
| OP_RI2, /* CLI */ | |
| OP_RI2, /* OI */ | |
| OP_RI2, /* XI */ | |
| OP_RI2, /* LI */ | |
| OP_RI2, /* CI */ | |
| OP_RI2, /* AI */ | |
| OP_RI2, /* SI */ | |
| 0, 0, 0, 0 /* FC:FF */ | |
| }; | |
| /* CPU data structures | |
| cpu_dev CPU device descriptor | |
| cpu_unit CPU unit descriptor | |
| cpu_reg CPU register list | |
| cpu_mod CPU modifiers list | |
| */ | |
| DIB cpu_dib = { d_DS, -1, v_DS, NULL, &display }; | |
| UNIT cpu_unit = { UDATA (NULL, UNIT_FIX | UNIT_BINK, MAXMEMSIZE32) }; | |
| REG cpu_reg[] = { | |
| { HRDATA (PC, PC, 20) }, | |
| { HRDATA (OPC, oPC, 20), REG_HRO }, | |
| { HRDATA (R0, GREG[0], 32) }, | |
| { HRDATA (R1, GREG[1], 32) }, | |
| { HRDATA (R2, GREG[2], 32) }, | |
| { HRDATA (R3, GREG[3], 32) }, | |
| { HRDATA (R4, GREG[4], 32) }, | |
| { HRDATA (R5, GREG[5], 32) }, | |
| { HRDATA (R6, GREG[6], 32) }, | |
| { HRDATA (R7, GREG[7], 32) }, | |
| { HRDATA (R8, GREG[8], 32) }, | |
| { HRDATA (R9, GREG[9], 32) }, | |
| { HRDATA (R10, GREG[10], 32) }, | |
| { HRDATA (R11, GREG[11], 32) }, | |
| { HRDATA (R12, GREG[12], 32) }, | |
| { HRDATA (R13, GREG[13], 32) }, | |
| { HRDATA (R14, GREG[14], 32) }, | |
| { HRDATA (R15, GREG[15], 32) }, | |
| { HRDATA (FR0, F[0], 32) }, | |
| { HRDATA (FR2, F[1], 32) }, | |
| { HRDATA (FR4, F[2], 32) }, | |
| { HRDATA (FR6, F[3], 32) }, | |
| { HRDATA (FR8, F[4], 32) }, | |
| { HRDATA (FR10, F[5], 32) }, | |
| { HRDATA (FR12, F[6], 32) }, | |
| { HRDATA (FR14, F[7], 32) }, | |
| { HRDATA (D0H, D[0].h, 32) }, | |
| { HRDATA (D0L, D[0].l, 32) }, | |
| { HRDATA (D2H, D[1].h, 32) }, | |
| { HRDATA (D2L, D[1].l, 32) }, | |
| { HRDATA (D4H, D[2].h, 32) }, | |
| { HRDATA (D4L, D[2].l, 32) }, | |
| { HRDATA (D6H, D[3].h, 32) }, | |
| { HRDATA (D6L, D[3].l, 32) }, | |
| { HRDATA (D8H, D[4].h, 32) }, | |
| { HRDATA (D8L, D[4].l, 32) }, | |
| { HRDATA (D10H, D[5].h, 32) }, | |
| { HRDATA (D10L, D[5].l, 32) }, | |
| { HRDATA (D12L, D[6].l, 32) }, | |
| { HRDATA (D12H, D[6].h, 32) }, | |
| { HRDATA (D14H, D[7].h, 32) }, | |
| { HRDATA (D14L, D[7].l, 32) }, | |
| { HRDATA (PSW, PSW, 16) }, | |
| { HRDATA (CC, PSW, 4) }, | |
| { HRDATA (SR, SR, 32) }, | |
| { HRDATA (DR, DR, 32) }, | |
| { HRDATA (DRX, DRX, 8) }, | |
| { FLDATA (DRMOD, drmod, 0) }, | |
| { FLDATA (SRPOS, srpos, 0) }, | |
| { HRDATA (DRPOS, drpos, 3) }, | |
| { BRDATA (IRQ, int_req, 16, 32, INTSZ) }, | |
| { BRDATA (IEN, int_enb, 16, 32, INTSZ) }, | |
| { BRDATA (MACREG, mac_reg, 16, 32, MAC_LNT) }, | |
| { HRDATA (MACSTA, mac_sta, 5) }, | |
| { HRDATA (QEVENT, qevent, 4), REG_HRO }, | |
| { FLDATA (STOP_INST, stop_inst, 0) }, | |
| { FLDATA (STOP_WAIT, stop_wait, 0) }, | |
| { BRDATA (PCQ, pcq, 16, 20, PCQ_SIZE), REG_RO+REG_CIRC }, | |
| { HRDATA (PCQP, pcq_p, 6), REG_HRO }, | |
| { HRDATA (WRU, sim_int_char, 8) }, | |
| { HRDATA (BLKIOD, blk_io.dfl, 16), REG_HRO }, | |
| { HRDATA (BLKIOC, blk_io.cur, 20), REG_HRO }, | |
| { HRDATA (BLKIOE, blk_io.end, 20), REG_HRO }, | |
| { BRDATA (GREG, GREG, 16, 32, 16 * NRSETS) }, | |
| { NULL } | |
| }; | |
| MTAB cpu_mod[] = { | |
| { UNIT_8RS|UNIT_TYPE, 0, NULL, "732", NULL }, | |
| { UNIT_DPFP, UNIT_DPFP, NULL, "DPFP", NULL }, | |
| { UNIT_TYPE, 0, "7/32, single precision fp", "732", NULL }, | |
| { UNIT_TYPE, UNIT_DPFP, "7/32, double precision fp", NULL, NULL }, | |
| { UNIT_8RS|UNIT_TYPE, UNIT_8RS|UNIT_DPFP|UNIT_832, NULL, "832", NULL }, | |
| { UNIT_8RS, 0, NULL, "2RS", NULL }, | |
| { UNIT_8RS|UNIT_TYPE, UNIT_8RS|UNIT_DPFP|UNIT_832, "832, 8 register sets", NULL, NULL }, | |
| { UNIT_8RS|UNIT_TYPE, UNIT_DPFP|UNIT_832, "832, 2 register sets", NULL, NULL }, | |
| { MTAB_XTD|MTAB_VDV, 0, "IDLE", "IDLE", &sim_set_idle, &sim_show_idle }, | |
| { MTAB_XTD|MTAB_VDV, 0, NULL, "NOIDLE", &sim_clr_idle, NULL }, | |
| { UNIT_MSIZE, 65536, NULL, "64K", &cpu_set_size }, | |
| { UNIT_MSIZE, 131072, NULL, "128K", &cpu_set_size }, | |
| { UNIT_MSIZE, 262144, NULL, "256K", &cpu_set_size }, | |
| { UNIT_MSIZE, 524288, NULL, "512K", &cpu_set_size }, | |
| { UNIT_MSIZE, 1048756, NULL, "1M", &cpu_set_size }, | |
| { MTAB_XTD|MTAB_VDV|MTAB_NMO, 0, NULL, "CONSINT", | |
| &cpu_set_consint, NULL, NULL }, | |
| { MTAB_XTD|MTAB_VDV|MTAB_NMO|MTAB_SHP, 0, "HISTORY", "HISTORY", | |
| &cpu_set_hist, &cpu_show_hist }, | |
| { 0 } | |
| }; | |
| DEBTAB cpu_deb[] = { | |
| { "INTEXC", LOG_CPU_I }, | |
| { "CONTEXT", LOG_CPU_C }, | |
| { NULL, 0 } | |
| }; | |
| DEVICE cpu_dev = { | |
| "CPU", &cpu_unit, cpu_reg, cpu_mod, | |
| 1, 16, 20, 2, 16, 16, | |
| &cpu_ex, &cpu_dep, &cpu_reset, | |
| NULL, NULL, NULL, | |
| &cpu_dib, DEV_DEBUG, 0, | |
| cpu_deb, NULL, NULL | |
| }; | |
| t_stat sim_instr (void) | |
| { | |
| volatile uint32 cc; /* set before setjmp */ | |
| t_stat reason; /* set after setjmp */ | |
| int abortval; | |
| /* Restore register state */ | |
| if (devtab_init ()) /* check conflicts */ | |
| return SCPE_STOP; | |
| if (cpu_unit.flags & (UNIT_DPFP | UNIT_832)) { | |
| fp_in_hwre = 1; /* fp in hwre */ | |
| dec_flgs = 0; /* all instr ok */ | |
| } | |
| else { | |
| fp_in_hwre = 0; /* fp in ucode */ | |
| dec_flgs = OP_DPF; /* sp only */ | |
| } | |
| if (cpu_unit.flags & UNIT_8RS) /* 8 register sets */ | |
| psw_reg_mask = 7; | |
| else psw_reg_mask = 1; /* 2 register sets */ | |
| int_eval (); /* eval interrupts */ | |
| cc = newPSW (PSW & PSW_MASK); /* split PSW, eval wait */ | |
| reason = 0; | |
| /* Abort handling | |
| If an abort occurs in memory protection, the relocation routine | |
| executes a longjmp to this area OUTSIDE the main simulation loop. | |
| Memory protection errors are the only sources of aborts in the | |
| Interdata 32b systems. All referenced variables must be globals, | |
| and all sim_instr scoped automatic variables must be volatile or | |
| set after the call on setjmp. | |
| */ | |
| abortval = setjmp (save_env); /* set abort hdlr */ | |
| if (abortval != 0) { /* mem mgt abort? */ | |
| qevent = qevent | EV_MAC; /* set MAC intr */ | |
| if (cpu_unit.flags & UNIT_832) /* 832? restore PC */ | |
| PC = oPC; | |
| } | |
| /* Event handling */ | |
| while (reason == 0) { /* loop until halted */ | |
| uint32 dev, drom, opnd, inc, lim, bufa; | |
| uint32 op, r1, r1p1, r2, rx2, ea; | |
| uint32 mpy, mpc, dvr; | |
| uint32 i, rslt, rlo, t; | |
| uint32 ir1, ir2, ir3, ityp; | |
| int32 sr, st; | |
| if (sim_interval <= 0) { /* check clock queue */ | |
| if ((reason = sim_process_event ())) | |
| break; | |
| int_eval (); | |
| } | |
| if (qevent) { /* any events? */ | |
| if (qevent & EV_MAC) { /* MAC interrupt? */ | |
| qevent = 0; /* clr all events */ | |
| cc = exception (MPRPSW, cc, 0); /* take exception */ | |
| int_eval (); /* re-eval intr */ | |
| continue; | |
| } | |
| if (qevent & EV_BLK) { /* block I/O in prog? */ | |
| dev = blk_io.dfl & DEV_MAX; /* get device */ | |
| cc = dev_tab[dev] (dev, IO_SS, 0) & 0xF; /* sense status */ | |
| if (cc == STA_BSY) { /* just busy? */ | |
| sim_interval = 0; /* force I/O event */ | |
| continue; | |
| } | |
| else if (cc == 0) { /* ready, no err? */ | |
| if (blk_io.dfl & BL_RD) { /* read? */ | |
| t = dev_tab[dev] (dev, IO_RD, 0); /* get byte */ | |
| if ((t == 0) && (blk_io.dfl & BL_LZ)) | |
| continue; | |
| blk_io.dfl = blk_io.dfl & ~BL_LZ; /* non-zero seen */ | |
| WriteB (blk_io.cur, t, VW); /* write mem */ | |
| } | |
| else { /* write */ | |
| t = ReadB (blk_io.cur, VR); /* read mem */ | |
| dev_tab[dev] (dev, IO_WD, t); /* put byte */ | |
| } | |
| if (blk_io.cur != blk_io.end) { /* more to do? */ | |
| blk_io.cur = (blk_io.cur + 1) & VAMASK; /* incr addr */ | |
| continue; | |
| } | |
| } | |
| qevent = qevent & ~EV_BLK; /* clr blk I/O flag */ | |
| int_eval (); /* re-eval intr */ | |
| continue; | |
| } | |
| if ((qevent & EV_INT) && (PSW & PSW_EXI)) { /* interrupt? */ | |
| dev = int_getdev (); /* get int dev */ | |
| cc = int_auto (dev, cc); /* do auto intr */ | |
| int_eval (); /* re-eval intr */ | |
| continue; | |
| } | |
| if (PSW & PSW_WAIT) { /* wait state? */ | |
| if (sim_idle_enab) /* idling enabled? */ | |
| sim_idle (TMR_LFC, TRUE); | |
| else sim_interval = sim_interval - 1; /* no, count cycle */ | |
| continue; | |
| } | |
| qevent = 0; /* no events */ | |
| } | |
| /* Instruction fetch and decode */ | |
| if (sim_brk_summ && sim_brk_test (PC, SWMASK ('E'))) { /* breakpoint? */ | |
| reason = STOP_IBKPT; /* stop simulation */ | |
| break; | |
| } | |
| sim_interval = sim_interval - 1; | |
| ir1 = ReadH (oPC = PC, VE); /* fetch instr */ | |
| op = (ir1 >> 8) & 0xFF; /* extract op,R1,R2 */ | |
| r1 = (ir1 >> 4) & 0xF; | |
| r2 = ir1 & 0xF; | |
| drom = decrom[op]; /* get decode flags */ | |
| ityp = drom & OP_MASK; /* instruction type */ | |
| if ((drom == 0) || (drom & dec_flgs)) { /* not in model? */ | |
| if (stop_inst) /* stop or */ | |
| reason = STOP_RSRV; | |
| else cc = exception (ILOPSW, cc, 0); /* exception */ | |
| continue; | |
| } | |
| if ((drom & OP_PRV) && (PSW & PSW_PRO)) { /* priv & protected? */ | |
| cc = exception (ILOPSW, cc, 0); /* exception */ | |
| continue; | |
| } | |
| switch (ityp) { /* decode instruction */ | |
| case OP_NO: /* no operand */ | |
| opnd = r2; /* assume short */ | |
| PC = (PC + 2) & VAMASK; /* increment PC */ | |
| break; | |
| case OP_RR: /* reg-reg */ | |
| opnd = R[r2]; /* ea/operand is R2 */ | |
| PC = (PC + 2) & VAMASK; /* increment PC */ | |
| break; | |
| case OP_RI1: /* reg-imm 1 */ | |
| ir2 = ReadH ((PC + 2) & VAMASK, VE); /* fetch immed */ | |
| opnd = SEXT16 (ir2); /* sign extend */ | |
| if (r2) /* index calculation */ | |
| opnd = (opnd + R[r2]) & DMASK32; | |
| PC = (PC + 4) & VAMASK; /* increment PC */ | |
| break; | |
| case OP_RI2: /* reg-imm 2 */ | |
| ir2 = ReadH ((PC + 2) & VAMASK, VE); /* fetch imm hi */ | |
| ir3 = ReadH ((PC + 4) & VAMASK, VE); /* fetch imm lo */ | |
| opnd = (ir2 << 16) | ir3; /* 32b immediate */ | |
| if (r2) /* index calculation */ | |
| opnd = (opnd + R[r2]) & DMASK32; | |
| PC = (PC + 6) & VAMASK; /* increment PC */ | |
| break; | |
| case OP_RX: case OP_RXB: case OP_RXH: case OP_RXF: /* reg-mem */ | |
| ir2 = ReadH ((PC + 2) & VAMASK, VE); /* fetch addr */ | |
| if ((ir2 & 0xC000) == 0) { /* displacement? */ | |
| PC = (PC + 4) & VAMASK; /* increment PC */ | |
| ea = ir2; /* abs 14b displ */ | |
| } | |
| else if (ir2 & 0x8000) { /* relative? */ | |
| PC = (PC + 4) & VAMASK; /* increment PC */ | |
| ea = PC + SEXT15 (ir2); /* add to incr PC */ | |
| } | |
| else { /* absolute */ | |
| rx2 = (ir2 >> 8) & 0xF; /* get second index */ | |
| ea = (ir2 & 0xFF) << 16; /* shift to place */ | |
| ir3 = ReadH ((PC + 4) & VAMASK, VE); /* fetch addr lo */ | |
| ea = ea | ir3; /* finish addr */ | |
| if (rx2) /* index calc 2 */ | |
| ea = ea + R[rx2]; | |
| PC = (PC + 6) & VAMASK; /* increment PC */ | |
| } | |
| if (r2) /* index calculation */ | |
| ea = ea + R[r2]; | |
| ea = ea & VAMASK; | |
| if (ityp == OP_RXF) /* get fw operand? */ | |
| opnd = ReadF (ea, VR); | |
| else if (ityp == OP_RXH) { /* get hw operand? */ | |
| t = ReadH (ea, VR); /* read halfword */ | |
| opnd = SEXT16 (t); /* sign extend */ | |
| } | |
| else if (ityp == OP_RXB) /* get byte opnd? */ | |
| opnd = ReadB (ea, VR); | |
| else opnd = ea; /* just address */ | |
| break; | |
| default: | |
| return SCPE_IERR; | |
| } | |
| if (hst_lnt) { /* instruction history? */ | |
| hst[hst_p].pc = oPC | HIST_PC; /* save decode state */ | |
| hst[hst_p].ir1 = ir1; | |
| hst[hst_p].ir2 = ir2; | |
| hst[hst_p].ir3 = ir3; | |
| hst[hst_p].r1 = R[r1]; | |
| hst[hst_p].ea = ea; | |
| hst[hst_p].opnd = opnd; | |
| hst_p = hst_p + 1; | |
| if (hst_p >= hst_lnt) | |
| hst_p = 0; | |
| } | |
| if (qevent & EV_MAC) /* MAC abort on fetch? */ | |
| continue; | |
| switch (op) { /* case on opcode */ | |
| /* Load/store instructions */ | |
| case 0x08: /* LR - RR */ | |
| case 0x24: /* LIS - NO */ | |
| case 0x48: /* LH - RXH */ | |
| case 0x58: /* L - RXF */ | |
| case 0xC8: /* LHI - RI1 */ | |
| case 0xF8: /* LI - RI2 */ | |
| R[r1] = opnd; /* load operand */ | |
| CC_GL_32 (R[r1]); /* set G,L */ | |
| break; | |
| case 0x73: /* LHL - RXH */ | |
| R[r1] = opnd & DMASK16; /* get op, zero ext */ | |
| CC_GL_32 (R[r1]); /* set G, L */ | |
| break; | |
| case 0x25: /* LCS - NO */ | |
| R[r1] = NEG (opnd); /* load complement */ | |
| CC_GL_32 (R[r1]); /* set G,L */ | |
| break; | |
| case 0xE6: /* LA - RX */ | |
| R[r1] = ea; /* load addr */ | |
| break; | |
| case 0x63: /* LRA - RX */ | |
| cc = RelocT (R[r1] & VAMASK, ea, VR, &R[r1]); /* test reloc */ | |
| break; | |
| case 0x40: /* STH - RX */ | |
| WriteH (ea, R[r1], VW); /* store register */ | |
| break; | |
| case 0x50: /* ST - RX */ | |
| WriteF (ea, R[r1], VW); /* store register */ | |
| break; | |
| case 0xD1: /* LM - RX */ | |
| for ( ; r1 <= 0xF; r1++) { /* loop thru reg */ | |
| R[r1] = ReadF (ea, VR); /* load register */ | |
| ea = (ea + 4) & VAMASK; /* incr mem addr */ | |
| } | |
| break; | |
| case 0xD0: /* STM - RX */ | |
| for ( ; r1 <= 0xF; r1++) { /* loop thru reg */ | |
| WriteF (ea, R[r1], VW); /* store register */ | |
| ea = (ea + 4) & VAMASK; /* incr mem addr */ | |
| } | |
| break; | |
| case 0xE0: /* TS - RXH */ | |
| CC_GL_16 (opnd); /* set cc's */ | |
| WriteH (ea, opnd | SIGN16, VW); /* set MSB */ | |
| break; | |
| case 0x93: /* LDBR - RR */ | |
| case 0xD3: /* LDB - RXB */ | |
| R[r1] = opnd & DMASK8; /* load byte */ | |
| break; | |
| case 0x92: /* STBR - NO */ | |
| R[r2] = (R[r2] & ~DMASK8) | (R[r1] & DMASK8); /* store byte */ | |
| break; | |
| case 0xD2: /* STB - RX */ | |
| WriteB (ea, R[r1], VW); /* store byte */ | |
| break; | |
| case 0x34: /* EXHR - RR */ | |
| R[r1] = ((opnd >> 16) & DMASK16) | ((opnd & DMASK16) << 16); | |
| break; | |
| case 0x94: /* EXBR - RR */ | |
| R[r1] = (R[r1] & ~DMASK16) | | |
| ((opnd >> 8) & DMASK8) | ((opnd & DMASK8) << 8); | |
| break; | |
| /* Control instructions */ | |
| case 0x01: /* BALR - RR */ | |
| case 0x41: /* BAL - RX */ | |
| PCQ_ENTRY; /* save old PC */ | |
| R[r1] = PC; /* save cur PC */ | |
| PC = opnd & VAMASK; /* branch */ | |
| break; | |
| case 0x02: /* BTCR - RR */ | |
| case 0x42: /* BTC - RX */ | |
| if (cc & r1) { /* test CC's */ | |
| PCQ_ENTRY; /* branch if true */ | |
| PC = opnd & VAMASK; | |
| } | |
| break; | |
| case 0x20: /* BTBS - NO */ | |
| if (cc & r1) { /* test CC's */ | |
| PCQ_ENTRY; /* branch if true */ | |
| PC = (oPC - r2 - r2) & VAMASK; | |
| } | |
| break; | |
| case 0x21: /* BTFS - NO */ | |
| if (cc & r1) { /* test CC's */ | |
| PCQ_ENTRY; /* branch if true */ | |
| PC = (oPC + r2 + r2) & VAMASK; | |
| } | |
| break; | |
| case 0x03: /* BFCR - RR */ | |
| case 0x43: /* BFC - RX */ | |
| if ((cc & r1) == 0) { /* test CC's */ | |
| PCQ_ENTRY; /* branch if false */ | |
| PC = opnd & VAMASK; | |
| } | |
| break; | |
| case 0x22: /* BFBS - NO */ | |
| if ((cc & r1) == 0) { /* test CC's */ | |
| PCQ_ENTRY; /* branch if false */ | |
| PC = (oPC - r2 - r2) & VAMASK; | |
| } | |
| break; | |
| case 0x23: /* BFFS - NO */ | |
| if ((cc & r1) == 0) { /* test CC's */ | |
| PCQ_ENTRY; /* branch if false */ | |
| PC = (oPC + r2 + r2) & VAMASK; | |
| } | |
| break; | |
| case 0xC0: /* BXH - RX */ | |
| inc = R[(r1 + 1) & 0xF]; /* inc = R1 + 1 */ | |
| lim = R[(r1 + 2) & 0xF]; /* lim = R1 + 2 */ | |
| R[r1] = (R[r1] + inc) & DMASK32; /* R1 = R1 + inc */ | |
| if (R[r1] > lim) { /* if R1 > lim */ | |
| PCQ_ENTRY; /* branch */ | |
| PC = opnd & VAMASK; | |
| } | |
| break; | |
| case 0xC1: /* BXLE - RX */ | |
| inc = R[(r1 + 1) & 0xF]; /* inc = R1 + 1 */ | |
| lim = R[(r1 + 2) & 0xF]; /* lim = R1 + 2 */ | |
| R[r1] = (R[r1] + inc) & DMASK32; /* R1 = R1 + inc */ | |
| if (R[r1] <= lim) { /* if R1 <= lim */ | |
| PCQ_ENTRY; /* branch */ | |
| PC = opnd & VAMASK; | |
| } | |
| break; | |
| /* Logical instructions */ | |
| case 0x04: /* NR - RR */ | |
| case 0x44: /* NH - RXH */ | |
| case 0x54: /* N - RXF */ | |
| case 0xC4: /* NHI - RI1 */ | |
| case 0xF4: /* NI - RI2 */ | |
| R[r1] = R[r1] & opnd; /* result */ | |
| CC_GL_32 (R[r1]); /* set G,L */ | |
| break; | |
| case 0x06: /* OR - RR */ | |
| case 0x46: /* OH - RXH */ | |
| case 0x56: /* O - RXF */ | |
| case 0xC6: /* OHI - RI1 */ | |
| case 0xF6: /* OI - RI2 */ | |
| R[r1] = R[r1] | opnd; /* result */ | |
| CC_GL_32 (R[r1]); /* set G,L */ | |
| break; | |
| case 0x07: /* XR - RR */ | |
| case 0x47: /* XH - RXH */ | |
| case 0x57: /* X - RXF */ | |
| case 0xC7: /* XHI - RI1 */ | |
| case 0xF7: /* XI - RI2 */ | |
| R[r1] = R[r1] ^ opnd; /* result */ | |
| CC_GL_32 (R[r1]); /* set G,L */ | |
| break; | |
| case 0xC3: /* THI - RI1 */ | |
| case 0xF3: /* TI - RI2 */ | |
| rslt = R[r1] & opnd; /* result */ | |
| CC_GL_32 (rslt); /* set G, L */ | |
| break; | |
| case 0x05: /* CLR - RR */ | |
| case 0x45: /* CLH - RXH */ | |
| case 0x55: /* CL - RXF */ | |
| case 0xC5: /* CLHI - RI1 */ | |
| case 0xF5: /* CI - RI2 */ | |
| rslt = (R[r1] - opnd) & DMASK32; /* result */ | |
| CC_GL_32 (rslt); /* set G,L */ | |
| if (R[r1] < opnd) /* set C if borrow */ | |
| cc = cc | CC_C; | |
| if (((R[r1] ^ opnd) & (~opnd ^ rslt)) & SIGN32) | |
| cc = cc | CC_V; | |
| break; | |
| case 0xD4: /* CLB - RXB */ | |
| t = R[r1] & DMASK8; | |
| rslt = (t - opnd) & DMASK16; /* result */ | |
| CC_GL_16 (rslt); /* set G,L 16b */ | |
| if (t < opnd) /* set C if borrow */ | |
| cc = cc | CC_C; | |
| break; | |
| case 0x12: /* CHVR - RR */ | |
| t = cc & CC_C; /* save C */ | |
| R[r1] = (SEXT16 (opnd & DMASK16)) & DMASK32; /* result */ | |
| CC_GL_32 (R[r1]); /* set G, L */ | |
| if (R[r1] != opnd) /* wont fit? set V */ | |
| cc = cc | CC_V; | |
| cc = cc | t; /* restore C */ | |
| break; | |
| /* Shift instructions */ | |
| case 0xCC: /* SRHL - RI1 */ | |
| opnd = opnd & 0xF; /* shift count */ | |
| case 0x90: /* SRHLS - NO */ | |
| rslt = (R[r1] & DMASK16) >> opnd; /* result */ | |
| CC_GL_16 (rslt); /* set G,L 16b */ | |
| if (opnd && (((R[r1] & DMASK16) >> (opnd - 1)) & 1)) | |
| cc = cc | CC_C; | |
| R[r1] = (R[r1] & ~DMASK16) | rslt; /* store result */ | |
| break; | |
| case 0xCD: /* SLHL - RI1 */ | |
| opnd = opnd & 0xF; /* shift count */ | |
| case 0x91: /* SLHLS - NO */ | |
| rslt = R[r1] << opnd; /* result */ | |
| CC_GL_16 (rslt & DMASK16); /* set G,L 16b */ | |
| if (opnd && (rslt & 0x10000)) /* set C if shft out */ | |
| cc = cc | CC_C; | |
| R[r1] = (R[r1] & ~DMASK16) | (rslt & DMASK16); /* store result */ | |
| break; | |
| case 0xCE: /* SRHA - RI1 */ | |
| opnd = opnd & 0xF; /* shift count */ | |
| rslt = (SEXT16 (R[r1]) >> opnd) & DMASK16; /* result */ | |
| CC_GL_16 (rslt); /* set G,L 16b */ | |
| if (opnd && ((R[r1] >> (opnd - 1)) & 1)) | |
| cc = cc | CC_C; | |
| R[r1] = (R[r1] & ~DMASK16) | rslt; /* store result */ | |
| break; | |
| case 0xCF: /* SLHA - RI1 */ | |
| opnd = opnd & 0xF; /* shift count */ | |
| rslt = R[r1] << opnd; /* raw result */ | |
| R[r1] = (R[r1] & ~MMASK16) | (rslt & MMASK16); | |
| CC_GL_16 (R[r1] & DMASK16); /* set G,L 16b */ | |
| if (opnd && (rslt & SIGN16)) /* set C if shft out */ | |
| cc = cc | CC_C; | |
| break; | |
| case 0xEC: /* SRL - RI1 */ | |
| opnd = opnd & 0x1F; /* shift count */ | |
| case 0x10: /* SRLS - NO */ | |
| rslt = R[r1] >> opnd; /* result */ | |
| CC_GL_32 (rslt); /* set G,L */ | |
| if (opnd && ((R[r1] >> (opnd - 1)) & 1)) | |
| cc = cc | CC_C; | |
| R[r1] = rslt; /* store result */ | |
| break; | |
| case 0xED: /* SLL - RI1 */ | |
| opnd = opnd & 0x1F; /* shift count */ | |
| case 0x11: /* SLLS - NO */ | |
| rslt = (R[r1] << opnd) & DMASK32; /* result */ | |
| CC_GL_32 (rslt); /* set G,L */ | |
| if (opnd && ((R[r1] << (opnd - 1)) & SIGN32)) | |
| cc = cc | CC_C; | |
| R[r1] = rslt; /* store result */ | |
| break; | |
| case 0xEE: /* SRA - RI1 */ | |
| opnd = opnd & 0x1F; /* shift count */ | |
| rslt = (SEXT32 (R[r1]) >> opnd) & DMASK32; /* result */ | |
| CC_GL_32 (rslt); /* set G,L */ | |
| if (opnd && ((R[r1] >> (opnd - 1)) & 1)) | |
| cc = cc | CC_C; | |
| R[r1] = rslt; /* store result */ | |
| break; | |
| case 0xEF: /* SLA - RI1 */ | |
| opnd = opnd & 0x1F; /* shift count */ | |
| rslt = (R[r1] << opnd) & DMASK32; /* raw result */ | |
| R[r1] = (R[r1] & SIGN32) | (rslt & MMASK32); /* arith result */ | |
| CC_GL_32 (R[r1]); /* set G,L */ | |
| if (opnd && (rslt & SIGN32)) /* set C if shft out */ | |
| cc = cc | CC_C; | |
| break; | |
| case 0xEA: /* RRL - RI1 */ | |
| opnd = opnd & 0x1F; /* shift count */ | |
| if (opnd) /* if cnt > 0 */ | |
| R[r1] = (R[r1] >> opnd) | ((R[r1] << (32 - opnd)) & DMASK32); | |
| CC_GL_32 (R[r1]); /* set G,L */ | |
| break; | |
| case 0xEB: /* RLL - RI1 */ | |
| opnd = opnd & 0x1F; /* shift count */ | |
| if (opnd) | |
| R[r1] = ((R[r1] << opnd) & DMASK32) | (R[r1] >> (32 - opnd)); | |
| CC_GL_32 (R[r1]); /* set G,L */ | |
| break; | |
| /* Bit instructions */ | |
| case 0x74: /* TBT - RX */ | |
| t = 1u << (15 - (R[r1] & 0xF)); /* bit mask in HW */ | |
| ea = (ea + ((R[r1] >> 3) & ~1)) & VAMASK; /* HW location */ | |
| opnd = ReadH (ea, VR); /* read HW */ | |
| if (opnd & t) /* test bit */ | |
| cc = CC_G; | |
| else cc = 0; | |
| break; | |
| case 0x75: /* SBT - RX */ | |
| t = 1u << (15 - (R[r1] & 0xF)); /* bit mask in HW */ | |
| ea = (ea + ((R[r1] >> 3) & ~1)) & VAMASK; /* HW location */ | |
| opnd = ReadH (ea, VR); /* read HW */ | |
| WriteH (ea, opnd | t, VW); /* set bit, rewr */ | |
| if (opnd & t) /* test bit */ | |
| cc = CC_G; | |
| else cc = 0; | |
| break; | |
| case 0x76: /* RBT - RX */ | |
| t = 1u << (15 - (R[r1] & 0xF)); /* bit mask in HW */ | |
| ea = (ea + ((R[r1] >> 3) & ~1)) & VAMASK; /* HW location */ | |
| opnd = ReadH (ea, VR); /* read HW */ | |
| WriteH (ea, opnd & ~t, VW); /* clr bit, rewr */ | |
| if (opnd & t) /* test bit */ | |
| cc = CC_G; | |
| else cc = 0; | |
| break; | |
| case 0x77: /* CBT - RX */ | |
| t = 1u << (15 - (R[r1] & 0xF)); /* bit mask in HW */ | |
| ea = (ea + ((R[r1] >> 3) & ~1)) & VAMASK; /* HW location */ | |
| opnd = ReadH (ea, VR); /* read HW */ | |
| WriteH (ea, opnd ^ t, VW); /* com bit, rewr */ | |
| if (opnd & t) /* test bit */ | |
| cc = CC_G; | |
| else cc = 0; | |
| break; | |
| /* Arithmetic instructions */ | |
| case 0x0A: /* AR - RR */ | |
| case 0x26: /* AIS - NO */ | |
| case 0x4A: /* AH - RXH */ | |
| case 0x5A: /* A - RXF */ | |
| case 0xCA: /* AHI - RI1 */ | |
| case 0xFA: /* AI - RI2 */ | |
| rslt = (R[r1] + opnd) & DMASK32; /* result */ | |
| CC_GL_32 (rslt); /* set G,L */ | |
| if (rslt < opnd) /* set C if carry */ | |
| cc = cc | CC_C; | |
| if (((~R[r1] ^ opnd) & (R[r1] ^ rslt)) & SIGN32) | |
| cc = cc | CC_V; | |
| R[r1] = rslt; | |
| break; | |
| case 0x51: /* AM - RXF */ | |
| rslt = (R[r1] + opnd) & DMASK32; /* result */ | |
| WriteF (ea, rslt, VW); /* write result */ | |
| CC_GL_32 (rslt); /* set G,L */ | |
| if (rslt < opnd) /* set C if carry */ | |
| cc = cc | CC_C; | |
| if (((~R[r1] ^ opnd) & (R[r1] ^ rslt)) & SIGN32) | |
| cc = cc | CC_V; | |
| break; | |
| case 0x61: /* AHM - RXH */ | |
| rslt = (R[r1] + opnd) & DMASK16; /* result */ | |
| WriteH (ea, rslt, VW); /* write result */ | |
| CC_GL_16 (rslt); /* set G,L 16b */ | |
| if (rslt < (opnd & DMASK16)) /* set C if carry */ | |
| cc = cc | CC_C; | |
| if (((~R[r1] ^ opnd) & (R[r1] ^ rslt)) & SIGN16) | |
| cc = cc | CC_V; | |
| break; | |
| case 0x0B: /* SR - RR */ | |
| case 0x27: /* SIS - NO */ | |
| case 0x4B: /* SH - RXH */ | |
| case 0x5B: /* S - RXF */ | |
| case 0xCB: /* SHI - RI1 */ | |
| case 0xFB: /* SI - RI2 */ | |
| rslt = (R[r1] - opnd) & DMASK32; /* result */ | |
| CC_GL_32 (rslt); /* set G,L */ | |
| if (R[r1] < opnd) /* set C if borrow */ | |
| cc = cc | CC_C; | |
| if (((R[r1] ^ opnd) & (~opnd ^ rslt)) & SIGN32) | |
| cc = cc | CC_V; | |
| R[r1] = rslt; | |
| break; | |
| case 0x09: /* CR - RR */ | |
| case 0x49: /* CH - RXH */ | |
| case 0x59: /* C - RXF */ | |
| case 0xC9: /* CHI - RI1 */ | |
| case 0xF9: /* CI - RI2 */ | |
| if (R[r1] == opnd) cc = 0; /* =? */ | |
| else if ((R[r1] ^ opnd) & SIGN32) /* unlike signs? */ | |
| cc = (R[r1] & SIGN32)? (CC_C | CC_L): CC_G; | |
| else cc = (R[r1] > opnd)? CC_G: (CC_C | CC_L); /* like signs */ | |
| if (((R[r1] ^ opnd) & (~opnd ^ (R[r1] - opnd))) & SIGN32) | |
| cc = cc | CC_V; | |
| break; | |
| case 0x0C: /* MHR - RR */ | |
| case 0x4C: /* MH - RXH */ | |
| R[r1] = (SEXT16 (R[r1]) * SEXT16 (opnd)) & DMASK32; /* multiply */ | |
| break; | |
| case 0x1C: /* MR - RR */ | |
| case 0x5C: /* M - RXF */ | |
| r1p1 = (r1 + 1) & 0xF; | |
| mpc = ABS (opnd); /* |mpcnd| */ | |
| mpy = ABS (R[r1p1]); /* |mplyr| */ | |
| rslt = rlo = 0; /* clr result */ | |
| for (i = 0; i < 32; i++) { /* develop 32b */ | |
| t = 0; /* no cout */ | |
| if (mpy & 1) { /* cond add */ | |
| rslt = (rslt + mpc) & DMASK32; | |
| if (rslt < mpc) | |
| t = SIGN32; | |
| } | |
| rlo = (rlo >> 1) | ((rslt & 1) << 31); /* shift result */ | |
| rslt = (rslt >> 1) | t; | |
| mpy = mpy >> 1; /* shift mpylr */ | |
| } | |
| if ((opnd ^ R[r1p1]) & SIGN32) { | |
| DNEG (rslt, rlo); | |
| } | |
| R[r1] = rslt; /* store result */ | |
| R[r1p1] = rlo; | |
| break; | |
| case 0x0D: /* DHR - RR */ | |
| case 0x4D: /* DH - RXH */ | |
| opnd = opnd & DMASK16; /* force HW opnd */ | |
| if ((opnd == 0) || /* div by zero? */ | |
| ((R[r1] == 0x80000000) && (opnd == 0xFFFF))) { | |
| if (PSW & PSW_AFI) /* div fault enabled? */ | |
| cc = exception (AFIPSW, cc, 0); /* exception */ | |
| break; | |
| } | |
| r1p1 = (r1 + 1) & 0xF; | |
| st = SEXT32 (R[r1]) / SEXT16 (opnd); /* quotient */ | |
| sr = SEXT32 (R[r1]) % SEXT16 (opnd); /* remainder */ | |
| if ((st < 0x8000) && (st >= -0x8000)) { /* if quo fits */ | |
| R[r1] = sr & DMASK32; /* store remainder */ | |
| R[r1p1] = st & DMASK32; /* store quotient */ | |
| } | |
| else if (PSW & PSW_AFI) /* div fault enabled? */ | |
| cc = exception (AFIPSW, cc, 0); /* exception */ | |
| break; | |
| case 0x1D: /* DR - RR */ | |
| case 0x5D: /* D - RXF */ | |
| r1p1 = (r1 + 1) & 0xF; | |
| rslt = R[r1]; /* get dividend */ | |
| rlo = R[r1p1]; | |
| if (R[r1] & SIGN32) { DNEG (rslt, rlo); } /* |divd| */ | |
| dvr = ABS (opnd); /* |divr| */ | |
| if (rslt < dvr) { /* will div work? */ | |
| uint32 quos = R[r1] ^ opnd; /* expected sign */ | |
| for (i = t = 0; i < 32; i++) { /* 32 iterations */ | |
| rslt = ((rslt << 1) & DMASK32) | /* shift divd */ | |
| ((rlo >> 31) & 1); | |
| rlo = (rlo << 1) & DMASK32; | |
| t = (t << 1) & DMASK32; /* shift quo */ | |
| if (rslt >= dvr) { /* subtract work? */ | |
| rslt = rslt - dvr; /* divd -= divr */ | |
| t = t | 1; /* set quo bit */ | |
| } | |
| } | |
| if (quos & SIGN32) /* res -? neg quo */ | |
| t = NEG (t); | |
| if (R[r1] & SIGN32) /* adj rem sign */ | |
| rslt = NEG (rslt); | |
| if (t && ((t ^ quos) & SIGN32)) { /* res sign wrong? */ | |
| if (PSW & PSW_AFI) /* if enabled, */ | |
| cc = exception (AFIPSW, cc, 0); /* exception */ | |
| break; | |
| } | |
| R[r1] = rslt; /* store rem */ | |
| R[r1p1] = t; /* store quo */ | |
| } | |
| else if (PSW & PSW_AFI) /* div fault enabled? */ | |
| cc = exception (AFIPSW, cc, 0); /* exception */ | |
| break; | |
| /* Floating point instructions */ | |
| case 0x28: /* LER - NO */ | |
| case 0x38: /* LDR - NO */ | |
| case 0x68: /* LE - RX */ | |
| case 0x78: /* LD - RX */ | |
| cc = f_l (op, r1, r2, ea); /* load */ | |
| if ((cc & CC_V) && (PSW & PSW_AFI)) /* V set? */ | |
| cc = exception (AFIPSW, cc, 1); | |
| break; | |
| case 0x29: /* CER - NO */ | |
| case 0x39: /* CDR - NO */ | |
| case 0x69: /* CE - RX */ | |
| case 0x79: /* CD - RX */ | |
| cc = f_c (op, r1, r2, ea); /* compare */ | |
| break; | |
| case 0x2A: /* AER - NO */ | |
| case 0x2B: /* SER - NO */ | |
| case 0x3A: /* ADR - NO */ | |
| case 0x3B: /* SDR - NO */ | |
| case 0x6A: /* AE - RX */ | |
| case 0x6B: /* SE - RX */ | |
| case 0x7A: /* AD - RX */ | |
| case 0x7B: /* SD - RX */ | |
| cc = f_as (op, r1, r2, ea); /* add/sub */ | |
| if ((cc & CC_V) && (PSW & PSW_AFI)) /* V set? */ | |
| cc = exception (AFIPSW, cc, 1); | |
| break; | |
| case 0x2C: /* MER - NO */ | |
| case 0x3C: /* MDR - NO */ | |
| case 0x6C: /* ME - RX */ | |
| case 0x7C: /* MD - RX */ | |
| cc = f_m (op, r1, r2, ea); /* multiply */ | |
| if ((cc & CC_V) && (PSW & PSW_AFI)) /* V set? */ | |
| cc = exception (AFIPSW, cc, 1); | |
| break; | |
| case 0x2D: /* DER - NO */ | |
| case 0x3D: /* DDR - NO */ | |
| case 0x6D: /* DE - RX */ | |
| case 0x7D: /* DD - RX */ | |
| cc = f_d (op, r1, r2, ea); /* perform divide */ | |
| if ((cc & CC_V) && (PSW & PSW_AFI)) /* V set? */ | |
| cc = exception (AFIPSW, cc, 1); | |
| break; | |
| case 0x2E: /* FXR - NO */ | |
| case 0x3E: /* FXDR - NO */ | |
| cc = f_fix32 (op, r1, r2); /* cvt to integer */ | |
| break; | |
| case 0x2F: /* FLR - NO */ | |
| case 0x3F: /* FLDR - NO */ | |
| cc = f_flt32 (op, r1, r2); /* cvt to floating */ | |
| break; | |
| case 0x60: /* STE - RX */ | |
| t = ReadFReg (r1); /* get sp reg */ | |
| WriteF (ea, t, VW); /* write */ | |
| break; | |
| case 0x70: /* STD - RX */ | |
| WriteF (ea, D[r1 >> 1].h, VW); /* write hi */ | |
| WriteF ((ea + 4) & VAMASK, D[r1 >> 1].l, VW); /* write lo */ | |
| break; | |
| case 0x71: /* STME - RX */ | |
| for ( ; r1 <= 0xE; r1 = r1 + 2) { /* loop thru reg */ | |
| t = ReadFReg (r1); /* get sp reg */ | |
| WriteF (ea, t, VW); /* write */ | |
| ea = (ea + 4) & VAMASK; /* incr mem addr */ | |
| } | |
| break; | |
| case 0x72: /* LME - RX */ | |
| for ( ; r1 <= 0xE; r1 = r1 + 2) { /* loop thru reg */ | |
| t = ReadF (ea, VR); /* get value */ | |
| WriteFReg (r1, t); /* write reg */ | |
| ea = (ea + 4) & VAMASK; /* incr mem addr */ | |
| } | |
| break; | |
| case 0x7E: /* STMD - RX */ | |
| for ( ; r1 <= 0xE; r1 = r1 + 2) { /* loop thru reg */ | |
| WriteF (ea, D[r1 >> 1].h, VW); /* write register */ | |
| WriteF ((ea + 4) & VAMASK, D[r1 >> 1].l, VW); | |
| ea = (ea + 8) & VAMASK; /* incr mem addr */ | |
| } | |
| break; | |
| case 0x7F: /* LMD - RX */ | |
| for ( ; r1 <= 0xE; r1 = r1 + 2) { /* loop thru reg */ | |
| D[r1 >> 1].h = ReadF (ea, VR); /* load register */ | |
| D[r1 >> 1].l = ReadF ((ea + 4) & VAMASK, VR); | |
| ea = (ea + 8) & VAMASK; /* incr mem addr */ | |
| } | |
| break; | |
| /* Miscellaneous */ | |
| case 0xE1: /* SVC - RX */ | |
| PCQ_ENTRY; /* effective branch */ | |
| t = BUILD_PSW (cc); /* save PSW */ | |
| cc = newPSW (ReadF (SVNPS32, P)); /* get new PSW */ | |
| R[13] = ea & 0xFFFFFF; /* parameter */ | |
| R[14] = t; /* old PSW */ | |
| R[15] = PC; /* old PC */ | |
| PC = ReadH (SVNPC + r1 + r1, P); /* new PC */ | |
| if (DEBUG_PRI (cpu_dev, LOG_CPU_C)) fprintf (sim_deb, | |
| ">>SVC: oPC = %X, oPSW = %X, nPC = %X, nPSW = %X\n", | |
| pcq[pcq_p], t, PC, PSW); | |
| break; | |
| case 0xE2: /* SINT - RI1 */ | |
| dev = opnd & DEV_MAX; /* get dev */ | |
| cc = int_auto (dev, cc); /* auto int */ | |
| int_eval (); | |
| break; | |
| case 0xE3: /* SCP - RXH */ | |
| opnd = opnd & DMASK16; /* zero ext operand */ | |
| if (opnd & CCW32_B1) /* point to buf */ | |
| t = ea + CCB32_B1C; | |
| else t = ea + CCB32_B0C; | |
| sr = ReadH (t & VAMASK, VR); /* get count */ | |
| sr = SEXT16 (sr); /* sign extend */ | |
| if (sr <= 0) { /* <= 0? */ | |
| bufa = ReadF ((t + 2) & VAMASK, VR); /* get buf end */ | |
| if (opnd & CCW32_WR) /* write? */ | |
| R[r1] = ReadB ((bufa + sr) & VAMASK, VR); /* R1 gets mem */ | |
| else WriteB ((bufa + sr) & VAMASK, R[r1], VW); /* read, R1 to mem */ | |
| sr = sr + 1; /* inc count */ | |
| CC_GL_32 (sr & DMASK32); /* set cc's */ | |
| WriteH (t & VAMASK, sr, VW); /* rewrite */ | |
| if ((sr > 0) && !(opnd & CCW32_FST)) /* buf switch? */ | |
| WriteH (ea, opnd ^ CCW32_B1, VW); /* flip CCW bit */ | |
| } /* end if */ | |
| else cc = CC_V; | |
| break; | |
| case 0x18: /* LPSWR - RR */ | |
| PCQ_ENTRY; /* effective branch */ | |
| PC = R[(r2 + 1) & 0xF] & VAMASK; /* new PC (old reg set) */ | |
| if (DEBUG_PRI (cpu_dev, LOG_CPU_C)) | |
| fprintf (sim_deb, ">>LPSWR: oPC = %X, oPSW = %X, nPC = %X, nPSW = %X\n", | |
| pcq[pcq_p], BUILD_PSW (cc), PC, opnd); | |
| cc = newPSW (opnd); /* new PSW */ | |
| if (PSW & PSW_SQI) /* test for q */ | |
| cc = testsysq (cc); | |
| break; | |
| case 0xC2: /* LPSW - RXF */ | |
| PCQ_ENTRY; /* effective branch */ | |
| PC = ReadF ((ea + 4) & VAMASK, VR) & VAMASK; /* new PC */ | |
| if (DEBUG_PRI (cpu_dev, LOG_CPU_C)) | |
| fprintf (sim_deb, ">>LPSW: oPC = %X, oPSW = %X, nPC = %X, nPSW = %X\n", | |
| pcq[pcq_p], BUILD_PSW (cc), PC, opnd); | |
| cc = newPSW (opnd); /* new PSW */ | |
| if (PSW & PSW_SQI) /* test for q */ | |
| cc = testsysq (cc); | |
| break; | |
| case 0x95: /* EPSR - NO */ | |
| R[r1] = BUILD_PSW (cc); /* save PSW */ | |
| cc = newPSW (R[r2]); /* load new PSW */ | |
| if (PSW & PSW_SQI) /* test for q */ | |
| cc = testsysq (cc); | |
| break; | |
| case 0x64: /* ATL - RX */ | |
| case 0x65: /* ABL - RX */ | |
| cc = addtoq (ea, R[r1], op & 1); /* add to q */ | |
| break; | |
| case 0x66: /* RTL - RX */ | |
| case 0x67: /* RBL - RX */ | |
| cc = remfmq (ea, r1, op & 1); /* rem from q */ | |
| break; | |
| case 0x5E: /* CRC12 - RXH */ | |
| opnd = opnd & DMASK16; /* zero ext opnd */ | |
| t = (R[r1] & 0x3F) ^ opnd; | |
| for (i = 0; i < 6; i++) { | |
| if (t & 1) | |
| t = (t >> 1) ^ 0x0F01; | |
| else t = t >> 1; | |
| } | |
| WriteH (ea, t, VW); | |
| break; | |
| case 0x5F: /* CRC16 - RXH */ | |
| opnd = opnd & DMASK16; /* zero ext opnd */ | |
| t = (R[r1] & 0xFF) ^ opnd; | |
| for (i = 0; i < 8; i++) { | |
| if (t & 1) | |
| t = (t >> 1) ^ 0xA001; | |
| else t = t >> 1; | |
| } | |
| WriteH (ea, t, VW); | |
| break; | |
| case 0xE7: /* TLATE - RXF */ | |
| t = (opnd + ((R[r1] & DMASK8) << 1)) & VAMASK; /* table entry */ | |
| rslt = ReadH (t, VR); /* get entry */ | |
| if (rslt & SIGN16) /* direct xlate? */ | |
| R[r1] = rslt & DMASK8; | |
| else { | |
| PCQ_ENTRY; /* branch */ | |
| PC = rslt << 1; | |
| } | |
| break; | |
| /* I/O instructions */ | |
| case 0xDE: /* OC - RX */ | |
| opnd = ReadB (ea, VR); /* fetch operand */ | |
| case 0x9E: /* OCR - RR */ | |
| dev = R[r1] & DEV_MAX; | |
| if (DEV_ACC (dev)) { | |
| dev_tab[dev] (dev, IO_ADR, 0); /* select */ | |
| dev_tab[dev] (dev, IO_OC, opnd & DMASK8); /* send command */ | |
| cc = 0; | |
| } | |
| else cc = CC_V; | |
| int_eval (); /* re-eval intr */ | |
| break; | |
| case 0xDA: /* WD - RX */ | |
| opnd = ReadB (ea, VR); /* fetch operand */ | |
| case 0x9A: /* WDR - RR */ | |
| dev = R[r1] & DEV_MAX; | |
| if (DEV_ACC (dev)) { | |
| dev_tab[dev] (dev, IO_ADR, 0); /* select */ | |
| dev_tab[dev] (dev, IO_WD, opnd & DMASK8); /* send data */ | |
| cc = 0; | |
| } | |
| else cc = CC_V; | |
| int_eval (); /* re-eval intr */ | |
| break; | |
| case 0xD8: /* WH - RX */ | |
| opnd = ReadH (ea, VR); /* fetch operand */ | |
| case 0x98: /* WHR - RR */ | |
| dev = R[r1] & DEV_MAX; | |
| if (DEV_ACC (dev)) { | |
| if (dev_tab[dev] (dev, IO_ADR, 0)) /* select; hw ok? */ | |
| dev_tab[dev] (dev, IO_WH, opnd & DMASK16); /* send data */ | |
| else { /* byte only */ | |
| dev_tab[dev] (dev, IO_WD, (opnd >> 8) & DMASK8); /* hi */ | |
| dev_tab[dev] (dev, IO_WD, opnd & DMASK8); /* send lo byte */ | |
| } | |
| cc = 0; | |
| } | |
| else cc = CC_V; | |
| int_eval (); /* re-eval intr */ | |
| break; | |
| case 0x9B: /* RDR - RR */ | |
| case 0xDB: /* RD - RX */ | |
| dev = R[r1] & DEV_MAX; | |
| if (DEV_ACC (dev)) { /* dev exist? */ | |
| dev_tab[dev] (dev, IO_ADR, 0); /* select */ | |
| t = dev_tab[dev] (dev, IO_RD, 0); /* get data */ | |
| cc = 0; | |
| } | |
| else { /* no */ | |
| t = 0; | |
| cc = CC_V; | |
| } | |
| if (OP_TYPE (op) != OP_RR) /* RX or RR? */ | |
| WriteB (ea, t, VW); | |
| else R[r2] = t & DMASK8; | |
| int_eval (); /* re-eval intr */ | |
| break; | |
| case 0x99: /* RHR - RR */ | |
| case 0xD9: /* RH - RX */ | |
| dev = R[r1] & DEV_MAX; | |
| if (DEV_ACC (dev)) { /* dev exist? */ | |
| if (dev_tab[dev] (dev, IO_ADR, 0)) /* select, hw ok? */ | |
| t = dev_tab[dev] (dev, IO_RH, 0); /* get data */ | |
| else { /* byte only */ | |
| rslt = dev_tab[dev] (dev, IO_RD, 0); /* get byte */ | |
| t = dev_tab[dev] (dev, IO_RD, 0); /* get byte */ | |
| t = (rslt << 8) | t; /* merge */ | |
| } | |
| cc = 0; | |
| } | |
| else { /* no */ | |
| t = 0; | |
| cc = CC_V; | |
| } | |
| if (OP_TYPE (op) != OP_RR) /* RX or RR? */ | |
| WriteH (ea, t, VW); | |
| else R[r2] = t & DMASK16; | |
| int_eval (); /* re-eval intr */ | |
| break; | |
| case 0x9D: /* SSR - RR */ | |
| case 0xDD: /* SS - RX */ | |
| dev = R[r1] & DEV_MAX; | |
| if (DEV_ACC (dev)) { /* dev exist? */ | |
| dev_tab[dev] (dev, IO_ADR, 0); /* select */ | |
| t = dev_tab[dev] (dev, IO_SS, 0); /* get status */ | |
| } | |
| else t = STA_EX; /* no */ | |
| if (OP_TYPE (op) != OP_RR) /* RX or RR? */ | |
| WriteB (ea, t, VW); | |
| else R[r2] = t & DMASK8; | |
| cc = t & 0xF; | |
| int_eval (); /* re-eval intr */ | |
| break; | |
| /* Block I/O instructions | |
| On a real Interdata system, the block I/O instructions can't be | |
| interrupted or stopped. To model this behavior, while allowing | |
| the instructions to go back through fetch for I/O processing and | |
| WRU testing, the simulator implements a 'block I/O in progress' | |
| flag and status block. If a block I/O is in progress, normal | |
| interrupts and fetches are suppressed until the block I/O is done. | |
| */ | |
| case 0x96: /* WBR - RR */ | |
| case 0xD6: /* WB - RXF */ | |
| dev = R[r1] & DEV_MAX; | |
| if (DEV_ACC (dev)) { /* dev exist? */ | |
| if (OP_TYPE (op) != OP_RR) | |
| lim = ReadF ((ea + 4) & VAMASK, VR); | |
| else lim = R[(r2 + 1) & 0xF]; | |
| if (opnd > lim) /* start > end? */ | |
| cc = 0; | |
| else { /* no, start I/O */ | |
| dev_tab[dev] (dev, IO_ADR, 0); /* select dev */ | |
| blk_io.dfl = dev; /* set status block */ | |
| blk_io.cur = opnd; | |
| blk_io.end = lim; | |
| qevent = qevent | EV_BLK; /* I/O in prog */ | |
| } | |
| } | |
| else cc = CC_V; /* nx dev */ | |
| break; | |
| case 0x97: /* RBR - RR */ | |
| case 0xD7: /* RB - RXF */ | |
| dev = R[r1] & DEV_MAX; | |
| if (DEV_ACC (dev)) { /* dev exist? */ | |
| if (OP_TYPE (op) != OP_RR) | |
| lim = ReadF ((ea + 4) & VAMASK, VR); | |
| else lim = R[(r2 + 1) & 0xF]; | |
| if (opnd > lim) /* start > end? */ | |
| cc = 0; | |
| else { /* no, start I/O */ | |
| dev_tab[dev] (dev, IO_ADR, 0); /* select dev */ | |
| blk_io.dfl = dev | BL_RD; /* set status block */ | |
| blk_io.cur = opnd; | |
| blk_io.end = lim; | |
| qevent = qevent | EV_BLK; /* I/O in prog */ | |
| } | |
| } | |
| else cc = CC_V; /* nx dev */ | |
| break; | |
| case 0xD5: /* AL - RX */ | |
| dev = ReadB (AL_DEV, P); /* get device */ | |
| t = ReadB (AL_IOC, P); /* get command */ | |
| if (DEV_ACC (dev)) { /* dev exist? */ | |
| if (AL_BUF > ea) /* start > end? */ | |
| cc = 0; | |
| else { /* no, start I/O */ | |
| dev_tab[dev] (dev, IO_ADR, 0); /* select dev */ | |
| dev_tab[dev] (dev, IO_OC, t); /* start dev */ | |
| blk_io.dfl = dev | BL_RD | BL_LZ; /* set status block */ | |
| blk_io.cur = AL_BUF; | |
| blk_io.end = ea; | |
| qevent = qevent | EV_BLK; /* I/O in prog */ | |
| } | |
| } | |
| else cc = CC_V; /* nx dev */ | |
| break; | |
| } /* end switch */ | |
| } /* end while */ | |
| /* Simulation halted */ | |
| PSW = BUILD_PSW (cc); | |
| PC = PC & VAMASK; | |
| set_r_display (R); | |
| pcq_r->qptr = pcq_p; /* update pc q ptr */ | |
| return reason; | |
| } | |
| /* Load new PSW */ | |
| uint32 newPSW (uint32 val) | |
| { | |
| uint32 rs = PSW_GETREG (val); /* register set */ | |
| R = &GREG[rs * 16]; /* set register set */ | |
| PSW = val & PSW_MASK; /* store PSW */ | |
| int_eval (); /* update intreq */ | |
| if (PSW & PSW_WAIT) /* wait state? */ | |
| qevent = qevent | EV_WAIT; | |
| else qevent = qevent & ~EV_WAIT; | |
| if (PSW & PSW_EXI) /* enable/disable */ | |
| SET_ENB (v_DS); | |
| else CLR_ENB (v_DS); /* console intr */ | |
| return PSW & CC_MASK; | |
| } | |
| /* Exception handler - 7/32 always uses register set 0 */ | |
| uint32 exception (uint32 loc, uint32 cc, uint32 flg) | |
| { | |
| int32 oldPSW = BUILD_PSW (cc); /* save old PSW */ | |
| int32 oldPC = PC; /* save old PC */ | |
| cc = newPSW (ReadF (loc, P)); /* new PSW */ | |
| PC = ReadF (loc + 4, P) & VAMASK; /* new PC */ | |
| if (cpu_unit.flags & UNIT_832) { /* 8/32? */ | |
| R[14] = oldPSW; /* PSW to new 14 */ | |
| R[15] = oldPC; /* PC to new 15 */ | |
| } | |
| else { | |
| GREG[14] = oldPSW; /* 7/32, PSW to set 0 14 */ | |
| GREG[15] = oldPC; /* PC to set 0 15 */ | |
| } | |
| if (DEBUG_PRI (cpu_dev, LOG_CPU_I)) | |
| fprintf (sim_deb, ">>Exc %X: oPC = %X, oPSW = %X, nPC = %X, nPSW = %X\n", | |
| loc, oldPC, oldPSW, PC, PSW | cc | flg); | |
| return cc | flg; /* return CC */ | |
| } | |
| /* Test for queue interrupts - system queue addresses are physical */ | |
| uint32 testsysq (uint32 cc) | |
| { | |
| int32 qb = ReadF (SQP, P); /* get sys q addr */ | |
| int32 usd = ReadH (qb + Q32_USD, P); /* get use count */ | |
| if (usd) { /* entries? */ | |
| cc = exception (SQTPSW, cc, 0); /* take sysq exc */ | |
| if (cpu_unit.flags & UNIT_832) /* R13 = sys q addr */ | |
| R[13] = qb; | |
| else GREG[13] = qb; | |
| } | |
| return cc; | |
| } | |
| /* Add to queue */ | |
| uint32 addtoq (uint32 ea, uint32 val, uint32 flg) | |
| { | |
| uint32 slt, usd, wra, t; | |
| t = ReadF (ea, VR); /* slots/used */ | |
| slt = (t >> 16) & DMASK16; /* # slots */ | |
| usd = t & DMASK16; /* # used */ | |
| if (usd >= slt) /* list full? */ | |
| return CC_V; | |
| usd = (usd + 1) & DMASK16; /* inc # used */ | |
| WriteH (ea + Q32_USD, usd, VW); /* rewrite */ | |
| if (flg) { /* ABL? */ | |
| wra = ReadH ((ea + Q32_BOT) & VAMASK, VR); /* get bottom */ | |
| t = wra + 1; /* adv bottom */ | |
| if (t >= slt) /* wrap if necc */ | |
| t = 0; | |
| WriteH ((ea + Q32_BOT) & VAMASK, t, VW); /* rewrite bottom */ | |
| } | |
| else { | |
| wra = ReadH ((ea + Q32_TOP) & VAMASK, VR); /* ATL, get top */ | |
| if (wra == 0) | |
| wra = (slt - 1) & DMASK16; /* wrap if necc */ | |
| else wra = wra - 1; /* dec top */ | |
| WriteH ((ea + Q32_TOP) & VAMASK, wra, VW); /* rewrite top */ | |
| } | |
| WriteF ((ea + Q32_BASE + (wra * Q32_SLNT)) & VAMASK, val, VW); /* write slot */ | |
| return 0; | |
| } | |
| /* Remove from queue */ | |
| uint32 remfmq (uint32 ea, uint32 r1, uint32 flg) | |
| { | |
| uint32 slt, usd, rda, t; | |
| t = ReadF (ea, VR); /* get slots/used */ | |
| slt = (t >> 16) & DMASK16; /* # slots */ | |
| usd = t & DMASK16; /* # used */ | |
| if (usd == 0) /* empty? */ | |
| return CC_V; | |
| usd = usd - 1; /* dec used */ | |
| WriteH (ea + Q32_USD, usd, VW); /* rewrite */ | |
| if (flg) { /* RBL? */ | |
| rda = ReadH ((ea + Q32_BOT) & VAMASK, VR); /* get bottom */ | |
| if (rda == 0) /* wrap if necc */ | |
| rda = (slt - 1) & DMASK16; | |
| else rda = rda - 1; /* dec bottom */ | |
| WriteH ((ea + Q32_BOT) & VAMASK, rda, VW); /* rewrite bottom */ | |
| } | |
| else { | |
| rda = ReadH ((ea + Q32_TOP) & VAMASK, VR); /* RTL, get top */ | |
| t = rda + 1; /* adv top */ | |
| if (t >= slt) /* wrap if necc */ | |
| t = 0; | |
| WriteH ((ea + Q32_TOP) & VAMASK, t, VW); /* rewrite top */ | |
| } | |
| R[r1] = ReadF ((ea + Q32_BASE + (rda * Q32_SLNT)) & VAMASK, VR); /* read slot */ | |
| if (usd) | |
| return CC_G; | |
| else return 0; | |
| } | |
| /* Automatic interrupt processing */ | |
| uint32 int_auto (uint32 dev, uint32 cc) | |
| { | |
| uint32 addr, vec, by, ccw, ccwa, ccwb; | |
| uint32 i, hw, tblad, tblen, bufe, st, t; | |
| int32 bufc; | |
| uint32 oldPSW = BUILD_PSW (cc); | |
| vec = ReadH (INTSVT + dev + dev, P); /* get vector */ | |
| newPSW (0x2800); /* new PSW */ | |
| R[0] = oldPSW; /* save old PSW */ | |
| R[1] = PC; /* save PC */ | |
| R[2] = dev; /* set dev # */ | |
| if (DEBUG_PRI (cpu_dev, LOG_CPU_I)) | |
| fprintf (sim_deb, ">>Int %X: oPC = %X, oPSW = %X, nPC = %X, nPSW = %X\n", | |
| dev, PC, oldPSW, vec, 0x2800); | |
| if (DEV_ACC (dev)) { /* dev exist? */ | |
| hw = dev_tab[dev] (dev, IO_ADR, 0); /* select, get hw */ | |
| R[3] = st = dev_tab[dev] (dev, IO_SS, 0); /* sense status */ | |
| } | |
| else { | |
| hw = 0; | |
| R[3] = CC_V; | |
| } | |
| if ((vec & 1) == 0) { /* immed int? */ | |
| PC = vec; /* new PC */ | |
| return PSW & CC_MASK; /* exit */ | |
| } | |
| R[4] = ccwa = vec & ~1; /* save CCW addr */ | |
| ccw = ReadH (ccwa, VR); /* read CCW */ | |
| if ((ccw & CCW32_EXE) == 0) { /* exec clr? */ | |
| PC = ReadH (ccwa + CCB32_SUB, VR); /* get subr */ | |
| return 0; /* CC = 0 */ | |
| } | |
| if (!DEV_ACC (dev) || (st & CCW32_STA (ccw))) { /* bad status? */ | |
| PC = ReadH (ccwa + CCB32_SUB, VR); /* get subr */ | |
| return CC_L; /* CC = L */ | |
| } | |
| if (ccw & CCW32_FST) { /* fast mode? */ | |
| t = ReadH (ccwa + CCB32_B0C, VR); /* get count */ | |
| bufc = SEXT16 (t); /* sign ext */ | |
| if (bufc <= 0) { /* still valid? */ | |
| bufe = ReadF (ccwa + CCB32_B0E, VR); /* get end addr */ | |
| addr = (bufe + bufc) & VAMASK; | |
| if (hw) { /* halfword? */ | |
| if (ccw & CCW32_WR) { /* write? */ | |
| t = ReadH (addr, VR); /* get hw */ | |
| dev_tab[dev] (dev, IO_WH, t); /* send to dev */ | |
| } | |
| else { /* read */ | |
| t = dev_tab[dev] (dev, IO_RH, 0); /* get hw */ | |
| WriteH (addr, t, VW); /* write to mem */ | |
| } | |
| bufc = bufc + 2; /* adv buf cnt */ | |
| } | |
| else { /* byte */ | |
| if (ccw & CCW32_WR) { /* write? */ | |
| t = ReadB (addr, VR); /* get byte */ | |
| dev_tab[dev] (dev, IO_WD, t); /* send to dev */ | |
| } | |
| else { /* read */ | |
| t = dev_tab[dev] (dev, IO_RD, 0); /* get byte */ | |
| WriteB (addr, t, VW); /* write to mem */ | |
| } | |
| bufc = bufc + 1; /* adv buf cnt */ | |
| } | |
| WriteH (ccwa + CCB32_B0C, bufc, VW); /* rewrite cnt */ | |
| if (bufc > 0) { | |
| PC = ReadH (ccwa + CCB32_SUB, VR); /* get subr */ | |
| return CC_G; /* CC = G */ | |
| } | |
| } /* end if bufc <= 0 */ | |
| } /* end fast */ | |
| else { /* slow mode */ | |
| if (ccw & CCW32_B1) /* which buf? */ | |
| ccwb = ccwa + CCB32_B1C; | |
| else ccwb = ccwa + CCB32_B0C; | |
| t = ReadH (ccwb, VR); /* get count */ | |
| bufc = SEXT16 (t); /* sign ext */ | |
| if (bufc <= 0) { /* still valid? */ | |
| bufe = ReadF (ccwb + 2, VR); /* get end addr */ | |
| addr = (bufe + bufc) & VAMASK; | |
| if (ccw & CCW32_WR) { /* write? */ | |
| by = ReadB (addr, VR); /* byte fm mem */ | |
| if (ccw & CCW32_TL) { /* translate? */ | |
| tblad = ReadF (ccwa + CCB32_TAB, VR); /* get tbl addr */ | |
| tblen = (tblad + (by << 1)) & VAMASK; /* tbl entry addr */ | |
| t = ReadH (tblen, VR); /* get tbl entry */ | |
| if ((t & SIGN16) == 0) { /* special xlate? */ | |
| PC = t << 1; /* change PC */ | |
| R[3] = by; /* untrans char */ | |
| return 0; /* CC = 0 */ | |
| } | |
| by = t & DMASK8; /* replace */ | |
| } | |
| dev_tab[dev] (dev, IO_WD, by); /* write to dev */ | |
| } | |
| else { /* read */ | |
| by = dev_tab[dev] (dev, IO_RD, 0); /* get from dev */ | |
| if (ccw & CCW32_TL) { /* translate? */ | |
| tblad = ReadF (ccwa + CCB32_TAB, VR); /* get tbl addr */ | |
| tblen = (tblad + (by << 1)) & VAMASK; /* tbl entry addr */ | |
| t = ReadH (tblen, VR); /* get tbl entry */ | |
| if ((t & SIGN16) == 0) { /* special xlate? */ | |
| PC = t << 1; /* change PC */ | |
| R[3] = by; /* untrans char */ | |
| return 0; /* CC = 0 */ | |
| } | |
| WriteB (addr, t, VW); /* wr trans */ | |
| } | |
| else WriteB (addr, by, VW); /* wr orig */ | |
| } | |
| t = ReadH (ccwa + CCB32_CHK, VR); /* get check wd */ | |
| t = t ^ by; /* start LRC */ | |
| if (ccw & CCW32_CRC) { /* CRC? */ | |
| for (i = 0; i < 8; i++) { | |
| if (t & 1) | |
| t = (t >> 1) ^ 0xA001; | |
| else t = t >> 1; | |
| } | |
| } | |
| WriteH (ccwa + CCB32_CHK, t, VW); /* rewrite chk wd */ | |
| bufc = bufc + 1; /* adv buf cnt */ | |
| WriteH (ccwb, bufc, VW); /* rewrite cnt */ | |
| if (bufc > 0) { /* cnt pos? */ | |
| ccw = ccw ^ CCW32_B1; /* flip buf */ | |
| WriteH (ccwa, ccw, VW); /* rewrite */ | |
| PC = ReadH (ccwa + CCB32_SUB, VR); /* get subr */ | |
| return CC_G; /* CC = G */ | |
| } | |
| } /* end if bufc */ | |
| } /* end slow */ | |
| PC = R[1]; /* restore PC */ | |
| return newPSW (R[0]); /* restore PSW, CC */ | |
| } | |
| /* Display register device */ | |
| uint32 display (uint32 dev, uint32 op, uint32 dat) | |
| { | |
| int t; | |
| switch (op) { | |
| case IO_ADR: /* select */ | |
| if (!drmod) /* norm mode? clr */ | |
| drpos = srpos = 0; | |
| return BY; /* byte only */ | |
| case IO_OC: /* command */ | |
| op = op & 0xC0; | |
| if (op == 0x40) { /* x40 = inc */ | |
| drmod = 1; | |
| drpos = srpos = 0; /* init cntrs */ | |
| } | |
| else if (op == 0x80) /* x80 = norm */ | |
| drmod = 0; | |
| break; | |
| case IO_WD: /* write */ | |
| if (drpos < 4) | |
| DR = (DR & ~(DMASK8 << (drpos * 8))) | (dat << (drpos * 8)); | |
| else if (drpos == 4) | |
| DRX = dat; | |
| drpos = (drpos + 1) & 0x7; | |
| break; | |
| case IO_RD: /* read */ | |
| t = (SR >> (srpos * 8)) & DMASK8; | |
| srpos = srpos ^ 1; | |
| return t; | |
| case IO_SS: /* status */ | |
| return 0x80; | |
| } | |
| return 0; | |
| } | |
| /* Relocation and protection */ | |
| uint32 Reloc (uint32 va, uint32 rel) | |
| { | |
| uint32 seg, off, mapr, lim; | |
| seg = VA_GETSEG (va); /* get seg num */ | |
| off = VA_GETOFF (va); /* get offset */ | |
| mapr = mac_reg[seg]; /* get seg reg */ | |
| lim = GET_SRL (mapr); /* get limit */ | |
| if (off >= lim) { /* limit viol? */ | |
| mac_sta = MACS_L; /* set status */ | |
| ABORT (MPRO); /* abort */ | |
| } | |
| if ((mapr & SR_PRS) == 0) { /* not present? */ | |
| mac_sta = MACS_NP; /* set status */ | |
| ABORT (MPRO); /* abort */ | |
| } | |
| if ((rel == VE) && (mapr & SR_EXP)) { /* exec, prot? */ | |
| mac_sta = MACS_EX; /* set status */ | |
| qevent = qevent | EV_MAC; /* req intr */ | |
| } | |
| if ((rel == VW) && (mapr & (SR_WPI | SR_WRP))) { /* write, prot? */ | |
| if (mapr & SR_WRP) { /* write abort? */ | |
| mac_sta = MACS_WP; /* set status */ | |
| ABORT (MPRO); /* abort */ | |
| } | |
| else { /* write intr */ | |
| mac_sta = MACS_WI; /* set status */ | |
| qevent = qevent | EV_MAC; /* req intr */ | |
| } | |
| } | |
| return (off + (mapr & SRF_MASK)) & PAMASK32; /* relocate */ | |
| } | |
| uint32 RelocT (uint32 va, uint32 base, uint32 rel, uint32 *pa) | |
| { | |
| uint32 seg, off, mapr, lim; | |
| seg = VA_GETSEG (va); /* get seg num */ | |
| off = VA_GETOFF (va); /* get offset */ | |
| mapr = ReadF ((base + (seg << 2)) & VAMASK, rel); /* get seg reg */ | |
| lim = GET_SRL (mapr); /* get limit */ | |
| if (off >= lim) /* limit viol? */ | |
| return CC_C; | |
| if ((mapr & SR_PRS) == 0) /* not present? */ | |
| return CC_V; | |
| *pa = off + (mapr & SRF_MASK); /* translate */ | |
| if (mapr & (SR_WRP | SR_WPI)) /* write prot? */ | |
| return CC_G; | |
| if (mapr & SR_EXP) /* exec prot? */ | |
| return CC_L; | |
| return 0; /* ok */ | |
| } | |
| /* Memory interface routines | |
| ReadB read byte (processor) | |
| ReadH read halfword (processor) | |
| ReadF read fullword (processor) | |
| WriteB write byte (processor) | |
| WriteH write halfword (processor) | |
| WriteF write fullword (processor) | |
| IOReadB read byte (IO) | |
| IOWriteB write byte (IO) | |
| IOReadH read halfword (IO) | |
| IOWriteH write halfword (IO) | |
| */ | |
| uint32 ReadB (uint32 loc, uint32 rel) | |
| { | |
| uint32 val; | |
| uint32 sc = (3 - (loc & 3)) << 3; | |
| if ((PSW & PSW_REL) == 0) { /* reloc off? */ | |
| if ((loc & ~03) == MAC_STA) { /* MAC status? */ | |
| val = mac_sta; /* read it */ | |
| qevent = qevent & ~EV_MAC; /* clr MAC intr */ | |
| } | |
| else val = M[loc >> 2]; /* get mem word */ | |
| } | |
| else if (rel == 0) /* phys ref? */ | |
| val = M[loc >> 2]; | |
| else { | |
| uint32 pa = Reloc (loc, rel); /* relocate */ | |
| val = M[pa >> 2]; | |
| } | |
| return (val >> sc) & DMASK8; | |
| } | |
| uint32 ReadH (uint32 loc, uint32 rel) | |
| { | |
| uint32 val; | |
| if ((PSW & PSW_REL) == 0) { /* reloc off? */ | |
| if ((loc & ~03) == MAC_STA) { /* MAC status? */ | |
| val = mac_sta; /* read it */ | |
| qevent = qevent & ~EV_MAC; /* clr MAC intr */ | |
| } | |
| else val = M[loc >> 2]; /* get mem word */ | |
| } | |
| else if (rel == 0) /* phys ref? */ | |
| val = M[loc >> 2]; | |
| else { | |
| uint32 pa = Reloc (loc, rel); /* relocate */ | |
| val = M[pa >> 2]; | |
| } | |
| return (val >> ((loc & 2)? 0: 16)) & DMASK16; | |
| } | |
| uint32 ReadF (uint32 loc, uint32 rel) | |
| { | |
| uint32 val; | |
| if ((PSW & PSW_REL) == 0) { /* reloc off? */ | |
| if ((loc & ~03) == MAC_STA) { /* MAC status? */ | |
| val = mac_sta; /* read it */ | |
| qevent = qevent & ~EV_MAC; /* clr MAC intr */ | |
| } | |
| else val = M[loc >> 2]; /* get mem word */ | |
| } | |
| else if (rel == 0) /* phys ref? */ | |
| val = M[loc >> 2]; | |
| else { | |
| uint32 pa = Reloc (loc, rel); /* relocate */ | |
| val = M[pa >> 2]; | |
| } | |
| return val; | |
| } | |
| void WriteB (uint32 loc, uint32 val, uint32 rel) | |
| { | |
| uint32 pa = loc; | |
| uint32 sc = (3 - (loc & 3)) << 3; | |
| val = val & DMASK8; | |
| if ((PSW & PSW_REL) == 0) { /* reloc off? */ | |
| uint32 idx = (pa - MAC_BASE) >> 2; /* check for MAC */ | |
| if (idx <= MAC_LNT) { | |
| if (idx < MAC_LNT) mac_reg[idx] = | |
| ((mac_reg[idx] & ~(DMASK8 << sc)) | (val << sc)) & SR_MASK; | |
| else { | |
| mac_sta = 0; | |
| qevent = qevent & ~EV_MAC; | |
| } | |
| } | |
| } | |
| else if (rel != 0) /* !phys? relocate */ | |
| pa = Reloc (loc, rel); | |
| if (MEM_ADDR_OK (pa)) | |
| M[pa >> 2] = (M[pa >> 2] & ~(DMASK8 << sc)) | (val << sc); | |
| return; | |
| } | |
| void WriteH (uint32 loc, uint32 val, uint32 rel) | |
| { | |
| uint32 pa = loc; | |
| val = val & DMASK16; | |
| if ((PSW & PSW_REL) == 0) { /* reloc off? */ | |
| uint32 idx = (pa - MAC_BASE) >> 2; /* check for MAC */ | |
| if (idx <= MAC_LNT) { | |
| if (idx < MAC_LNT) mac_reg[idx] = ((loc & 2)? | |
| ((mac_reg[idx] & ~DMASK16) | val): | |
| ((mac_reg[idx] & DMASK16) | (val << 16))) & SR_MASK; | |
| else { | |
| mac_sta = 0; | |
| qevent = qevent & ~EV_MAC; | |
| } | |
| } | |
| } | |
| else if (rel != 0) /* !phys? relocate */ | |
| pa = Reloc (loc, rel); | |
| if (MEM_ADDR_OK (pa)) | |
| M[pa >> 2] = (loc & 2)? ((M[pa >> 2] & ~DMASK16) | val): | |
| ((M[pa >> 2] & DMASK16) | (val << 16)); | |
| return; | |
| } | |
| void WriteF (uint32 loc, uint32 val, uint32 rel) | |
| { | |
| uint32 pa = loc; | |
| val = val & DMASK32; | |
| if (loc & 2) { | |
| WriteH (loc & VAMASK, (val >> 16) & DMASK16, rel); | |
| WriteH ((loc + 2) & VAMASK, val & DMASK16, rel); | |
| return; | |
| } | |
| if ((PSW & PSW_REL) == 0) { /* reloc off? */ | |
| uint32 idx = (pa - MAC_BASE) >> 2; /* check for MAC */ | |
| if (idx <= MAC_LNT) { | |
| if (idx < MAC_LNT) mac_reg[idx] = val & SR_MASK; | |
| else { | |
| mac_sta = 0; | |
| qevent = qevent & ~EV_MAC; | |
| } | |
| } | |
| } | |
| else if (rel != 0) /* !phys? relocate */ | |
| pa = Reloc (loc, rel); | |
| if (MEM_ADDR_OK (pa)) | |
| M[pa >> 2] = val & DMASK32; | |
| return; | |
| } | |
| uint32 IOReadB (uint32 loc) | |
| { | |
| uint32 sc = (3 - (loc & 3)) << 3; | |
| return (M[loc >> 2] >> sc) & DMASK8; | |
| } | |
| uint32 IOReadH (uint32 loc) | |
| { | |
| return (M[loc >> 2] >> ((loc & 2)? 0: 16)) & DMASK16; | |
| } | |
| void IOWriteB (uint32 loc, uint32 val) | |
| { | |
| uint32 sc = (3 - (loc & 3)) << 3; | |
| val = val & DMASK8; | |
| M[loc >> 2] = (M[loc >> 2] & ~(DMASK8 << sc)) | (val << sc); | |
| return; | |
| } | |
| void IOWriteH (uint32 loc, uint32 val) | |
| { | |
| uint32 sc = (loc & 2)? 0: 16; | |
| val = val & DMASK16; | |
| M[loc >> 2] = (M[loc >> 2] & ~(DMASK16 << sc)) | (val << sc); | |
| return; | |
| } | |
| /* Reset routine */ | |
| t_stat cpu_reset (DEVICE *dptr) | |
| { | |
| qevent = 0; /* no events */ | |
| mac_sta = 0; /* clear MAC */ | |
| newPSW (0); /* PSW = 0 */ | |
| set_r_display (R); | |
| DR = 0; /* clear display */ | |
| drmod = 0; | |
| blk_io.dfl = blk_io.cur = blk_io.end = 0; /* no block I/O */ | |
| sim_brk_types = sim_brk_dflt = SWMASK ('E'); /* init bkpts */ | |
| if (M == NULL) | |
| M = (uint32 *) calloc (MAXMEMSIZE32 >> 2, sizeof (uint32)); | |
| if (M == NULL) | |
| return SCPE_MEM; | |
| pcq_r = find_reg ("PCQ", NULL, dptr); /* init PCQ */ | |
| if (pcq_r) | |
| pcq_r->qptr = 0; | |
| else return SCPE_IERR; | |
| return SCPE_OK; | |
| } | |
| /* Memory examine */ | |
| t_stat cpu_ex (t_value *vptr, t_addr addr, UNIT *uptr, int32 sw) | |
| { | |
| if ((sw & SWMASK ('V')) && (PSW & PSW_REL)) { | |
| int32 cc = RelocT (addr, MAC_BASE, P, &addr); | |
| if (cc & (CC_C | CC_V)) | |
| return SCPE_NXM; | |
| } | |
| if (addr >= MEMSIZE) | |
| return SCPE_NXM; | |
| if (vptr != NULL) | |
| *vptr = IOReadH (addr); | |
| return SCPE_OK; | |
| } | |
| /* Memory deposit */ | |
| t_stat cpu_dep (t_value val, t_addr addr, UNIT *uptr, int32 sw) | |
| { | |
| if ((sw & SWMASK ('V')) && (PSW & PSW_REL)) { | |
| int32 cc = RelocT (addr, MAC_BASE, P, &addr); | |
| if (cc & (CC_C | CC_V)) | |
| return SCPE_NXM; | |
| } | |
| if (addr >= MEMSIZE) | |
| return SCPE_NXM; | |
| IOWriteH (addr, val); | |
| return SCPE_OK; | |
| } | |
| /* Change memory size */ | |
| t_stat cpu_set_size (UNIT *uptr, int32 val, char *cptr, void *desc) | |
| { | |
| uint32 mc = 0; | |
| uint32 i; | |
| if ((val <= 0) || (val > MAXMEMSIZE32) || ((val & 0xFFFF) != 0)) | |
| return SCPE_ARG; | |
| for (i = val; i < MEMSIZE; i = i + 4) | |
| mc = mc | M[i >> 2]; | |
| if ((mc != 0) && (!get_yn ("Really truncate memory [N]?", FALSE))) | |
| return SCPE_OK; | |
| MEMSIZE = val; | |
| for (i = MEMSIZE; i < MAXMEMSIZE32; i = i + 4) | |
| M[i >> 2] = 0; | |
| return SCPE_OK; | |
| } | |
| /* Set current R pointers for SCP */ | |
| void set_r_display (uint32 *rbase) | |
| { | |
| extern REG *find_reg (char *cptr, char **optr, DEVICE *dptr); | |
| REG *rptr; | |
| int32 i; | |
| rptr = find_reg ("R0", NULL, &cpu_dev); | |
| if (rptr == NULL) | |
| return; | |
| for (i = 0; i < 16; i++, rptr++) | |
| rptr->loc = (void *) (rbase + i); | |
| return; | |
| } | |
| /* Set console interrupt */ | |
| t_stat cpu_set_consint (UNIT *uptr, int32 val, char *cptr, void *desc) | |
| { | |
| if (PSW & PSW_EXI) | |
| SET_INT (v_DS); | |
| return SCPE_OK; | |
| } | |
| /* Set history */ | |
| t_stat cpu_set_hist (UNIT *uptr, int32 val, char *cptr, void *desc) | |
| { | |
| uint32 i, lnt; | |
| t_stat r; | |
| if (cptr == NULL) { | |
| for (i = 0; i < hst_lnt; i++) | |
| hst[i].pc = 0; | |
| hst_p = 0; | |
| return SCPE_OK; | |
| } | |
| lnt = (uint32) get_uint (cptr, 10, HIST_MAX, &r); | |
| if ((r != SCPE_OK) || (lnt && (lnt < HIST_MIN))) | |
| return SCPE_ARG; | |
| hst_p = 0; | |
| if (hst_lnt) { | |
| free (hst); | |
| hst_lnt = 0; | |
| hst = NULL; | |
| } | |
| if (lnt) { | |
| hst = (InstHistory *) calloc (lnt, sizeof (InstHistory)); | |
| if (hst == NULL) | |
| return SCPE_MEM; | |
| hst_lnt = lnt; | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Show history */ | |
| t_stat cpu_show_hist (FILE *st, UNIT *uptr, int32 val, void *desc) | |
| { | |
| int32 op, k, di, lnt; | |
| char *cptr = (char *) desc; | |
| t_value sim_eval[3]; | |
| t_stat r; | |
| InstHistory *h; | |
| if (hst_lnt == 0) /* enabled? */ | |
| return SCPE_NOFNC; | |
| if (cptr) { | |
| lnt = (int32) get_uint (cptr, 10, hst_lnt, &r); | |
| if ((r != SCPE_OK) || (lnt == 0)) | |
| return SCPE_ARG; | |
| } | |
| else lnt = hst_lnt; | |
| di = hst_p - lnt; /* work forward */ | |
| if (di < 0) | |
| di = di + hst_lnt; | |
| fprintf (st, "PC r1 operand ea IR\n\n"); | |
| for (k = 0; k < lnt; k++) { /* print specified */ | |
| h = &hst[(di++) % hst_lnt]; /* entry pointer */ | |
| if (h->pc & HIST_PC) { /* instruction? */ | |
| fprintf (st, "%06X %08X %08X ", h->pc & VAMASK32, h->r1, h->opnd); | |
| op = (h->ir1 >> 8) & 0xFF; | |
| if (OP_TYPE (op) >= OP_RX) | |
| fprintf (st, "%06X ", h->ea); | |
| else fprintf (st, " "); | |
| sim_eval[0] = h->ir1; | |
| sim_eval[1] = h->ir2; | |
| sim_eval[2] = h->ir3; | |
| if ((fprint_sym (st, h->pc & VAMASK32, sim_eval, &cpu_unit, SWMASK ('M'))) > 0) | |
| fprintf (st, "(undefined) %04X", h->ir1); | |
| fputc ('\n', st); /* end line */ | |
| } /* end if instruction */ | |
| } /* end for */ | |
| return SCPE_OK; | |
| } |