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rcornwell.sims/IBM360/ibm360_sys.c
Richard Cornwell 8a6ea8889e IBM360: Fixes to better handle storage modification bits.
2024-02-15 14:13:15 -05:00

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/* ibm360_sys.c: IBM 360 Simulator system interface.
Copyright (c) 2017-2020, Richard Cornwell
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.
*/
#include "ibm360_defs.h"
#include <ctype.h>
#include "sim_card.h"
extern DEVICE cpu_dev;
extern REG cpu_reg[];
extern uint32 M[MAXMEMSIZE];
/* SCP data structures and interface routines
sim_name simulator name string
sim_PC pointer to saved PC register descriptor
sim_emax number of words for examine
sim_devices array of pointers to simulated devices
sim_stop_messages array of pointers to stop messages
sim_load binary loader
*/
char sim_name[] = "IBM 360";
REG *sim_PC = &cpu_reg[0];
int32 sim_emax = 16;
DEVICE *sim_devices[] = {
&cpu_dev,
&chan_dev,
#ifdef NUM_DEVS_CON
&con_dev,
#endif
#ifdef NUM_DEVS_SCON
&scon_dev,
#endif
#ifdef NUM_DEVS_CDR
&cdr_dev,
#endif
#ifdef NUM_DEVS_CDP
&cdp_dev,
#endif
#ifdef NUM_DEVS_LPR
&lpr_dev,
#endif
#ifdef NUM_DEVS_MT
&mta_dev,
#if NUM_DEVS_MT > 1
&mtb_dev,
#endif
#endif
#ifdef NUM_DEVS_DASD
&dda_dev,
#if NUM_DEVS_DASD > 1
&ddb_dev,
#if NUM_DEVS_DASD > 2
&ddc_dev,
#if NUM_DEVS_DASD > 3
&ddd_dev,
#endif
#endif
#endif
#endif
#ifdef NUM_DEVS_COM
&coml_dev,
&com_dev,
#endif
#ifdef NUM_DEVS_SCOM
&scoml_dev,
&scom_dev,
#endif
NULL };
/* Simulator debug controls */
DEBTAB dev_debug[] = {
{"CMD", DEBUG_CMD, "Show command execution to devices"},
{"DATA", DEBUG_DATA, "Show data transfers"},
{"DETAIL", DEBUG_DETAIL, "Show details about device"},
{"EXP", DEBUG_EXP, "Show exception information"},
{"POS", DEBUG_POS, "Dasd positioning information"},
{0, 0}
};
/* Simulator debug controls */
DEBTAB cpu_debug[] = {
{"CMD", DEBUG_CMD, "Show command execution to devices"},
{"DATA", DEBUG_DATA, "Show data transfers"},
{"DETAIL", DEBUG_DETAIL, "Show details about device"},
{"EXP", DEBUG_EXP, "Show exception information"},
{"INST", DEBUG_INST, "Show instruction execution"},
{"CDATA", DEBUG_CDATA, "Show channel data"},
{"TRACE", DEBUG_TRACE, "Show instruction history"},
{"VMA", DEBUG_VMA, "Show assist history"},
{0, 0}
};
/* Simulator debug controls */
DEBTAB crd_debug[] = {
{"CMD", DEBUG_CMD, "Show command execution to devices"},
{"DATA", DEBUG_DATA, "Show data transfers"},
{"DETAIL", DEBUG_DETAIL, "Show details about device"},
{"EXP", DEBUG_EXP, "Show exception information"},
{"CARD", DEBUG_CARD, "Show Card read/punches"},
{"CDATA", DEBUG_CDATA, "Show channel data"},
{0, 0}
};
const char *sim_stop_messages[SCPE_BASE] = {
"Unknown error",
"Uninterruptable wait",
"Breakpoint"
};
const uint8 ascii_to_ebcdic[128] = {
/* Control */
0x01,0x02,0x03,0xFF,0x00,0x00,0x00,0x00, /*0-37*/
/*Control*/
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
/*Control*/
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
/*Control*/
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
/* sp ! " # $ % & ' */
0x40, 0x5a, 0x7f, 0x7b, 0x5b, 0x6c, 0x50, 0x7d, /* 40 - 77 */
/* ( ) * + , - . / */
0x4d, 0x5d, 0x5c, 0x4e, 0x6b, 0x60, 0x4b, 0x61,
/* 0 1 2 3 4 5 6 7 */
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
/* 8 9 : ; < = > ? */
0xf8, 0xf9, 0x7a, 0x5e, 0x4c, 0x7e, 0x6e, 0x6f,
/* @ A B C D E F G */
0x7c, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 100 - 137 */
/* H I J K L M N O */
0xc8, 0xc9, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6,
/* P Q R S T U V W */
0xd7, 0xd8, 0xd9, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6,
/* X Y Z [ \ ] ^ _ */
0xe7, 0xe8, 0xe9, 0xff, 0xe0, 0xff, 0x5f, 0x6d,
/* ` a b c d e f g */
0x79, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 140 - 177 */
/* h i j k l m n o */
0x88, 0x89, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96,
/* p q r s t u v w */
0x97, 0x98, 0x99, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6,
/* x y z { | } ~ del */
0xa7, 0xa8, 0xa9, 0xc0, 0x47, 0xd0, 0xa1, 0x6d,
};
const uint8 ebcdic_to_ascii[256] = {
/* 0 1 2 3 4 5 6 7 */
0x00, 0x01, 0x02, 0x03, 0xFF, 0x09, 0x00, 0x7f, /* 0x */
0xff, 0xff, 0xff, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
0x10, 0x11, 0x12, 0x19, 0x0a, 0x08, 0x08, 0xff, /* 1x */
0x18, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0x1c, 0xff, 0xff, 0x0a, 0xff, 0xff, /* 2x */
0xff, 0xff, 0xff, 0xff, 0xff, 0x05, 0x06, 0x07,
0xff, 0xff, 0xff, 0xff, 0xff, 0x1e, 0x00, 0xff, /* 3x */
0xff, 0xff, 0xff, 0xff, 0x14, 0x15, 0xff, 0xff,
' ', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 4x */
0xff, 0xff, '[', '.', '<', '(', '+', '|',
'&', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 5x */
0xff, 0xff, '!', '$', '*', ')', ';', '^',
'-', '/', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 6x */
0xff, 0xff, 0xff, ',', '%', '_', '>', '?',
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 7x */
0xff, '`', ':', '#', '@', '\'', '=', '"',
0xff, 'a', 'b', 'c', 'd', 'e', 'f', 'g', /* 8x */
'h', 'i', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 'j', 'k', 'l', 'm', 'n', 'o', 'p', /* 9x */
'q', 'r', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, '~', 's', 't', 'u', 'v', 'w', 'x', /* Ax */
'y', 'z', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* Bx */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
'{', 'A', 'B', 'C', 'D', 'E', 'F', 'G', /* Cx */
'H', 'I', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
'}', 'J', 'K', 'L', 'M', 'N', 'O', 'P', /* Dx */
'Q', 'R', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
'\\', 0xff, 'S', 'T', 'U', 'V', 'W', 'X', /* Ex */
'Y', 'Z', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
'0', '1', '2', '3', '4', '5', '6', '7', /* Fx */
'8', '9', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
};
/* Load a card image file into memory. */
t_stat sim_load (FILE *fileref, CONST char *cptr, CONST char *fnam, int flag)
{
return SCPE_NOFNC;
}
/* Symbol tables */
typedef struct _opcode {
uint8 opbase;
const char *name;
uint8 type;
} t_opcode;
#define RR 01
#define RX 02
#define RS 03
#define SI 04
#define SS 05
#define XX 06
#define LNMSK 07
#define ONEOP 010
#define IMDOP 020
#define TWOOP 030
#define ZEROOP 040
#define OPMSK 070
t_opcode optab[] = {
{ OP_SPM, "SPM", RR|ONEOP },
{ OP_BALR, "BALR", RR },
{ OP_BCTR, "BCTR", RR },
{ OP_BCR, "BCR", RR },
{ OP_SSK, "SSK", RR },
{ OP_ISK, "ISK", RR },
{ OP_SVC, "SVC", RR|IMDOP },
{ OP_BASR, "BASR", RR },
{ OP_LPR, "LPR", RR },
{ OP_LNR, "LNR", RR },
{ OP_LTR, "LTR", RR },
{ OP_LCR, "LCR", RR },
{ OP_NR, "NR", RR },
{ OP_OR, "OR", RR },
{ OP_XR, "XR", RR },
{ OP_CLR, "CLR", RR },
{ OP_CR, "CR", RR },
{ OP_LR, "LR", RR },
{ OP_AR, "AR", RR },
{ OP_SR, "SR", RR },
{ OP_MR, "MR", RR },
{ OP_DR, "DR", RR },
{ OP_ALR, "ALR", RR },
{ OP_SLR, "SLR", RR },
{ OP_LPDR, "LPDR", RR },
{ OP_LNDR, "LNDR", RR },
{ OP_LTDR, "LTDR", RR },
{ OP_LCDR, "LCDR", RR },
{ OP_HDR, "HDR", RR },
{ OP_LRDR, "LRDR", RR },
{ OP_MXR, "MXR", RR },
{ OP_MXDR, "MXDR", RR },
{ OP_LDR, "LDR", RR },
{ OP_CDR, "CDR", RR },
{ OP_ADR, "ADR", RR },
{ OP_SDR, "SDR", RR },
{ OP_MDR, "MDR", RR },
{ OP_DDR, "DDR", RR },
{ OP_AWR, "AWR", RR },
{ OP_SWR, "SWR", RR },
{ OP_LPER, "LPER", RR },
{ OP_LNER, "LNER", RR },
{ OP_LTER, "LTER", RR },
{ OP_LCER, "LCER", RR },
{ OP_HER, "HER", RR },
{ OP_LRER, "LRER", RR },
{ OP_AXR, "AXR", RR },
{ OP_SXR, "SXR", RR },
{ OP_LER, "LER", RR },
{ OP_CER, "CER", RR },
{ OP_AER, "AER", RR },
{ OP_SER, "SER", RR },
{ OP_MER, "MER", RR },
{ OP_DER, "DER", RR },
{ OP_AUR, "AUR", RR },
{ OP_SUR, "SUR", RR },
{ OP_STH, "STH", RX },
{ OP_LA, "LA", RX },
{ OP_STC, "STC", RX },
{ OP_IC, "IC", RX },
{ OP_EX, "EX", RX },
{ OP_BAL, "BAL", RX },
{ OP_BCT, "BCT", RX },
{ OP_BC, "BC", RX },
{ OP_LH, "LH", RX },
{ OP_CH, "CH", RX },
{ OP_AH, "AH", RX },
{ OP_SH, "SH", RX },
{ OP_MH, "MH", RX },
{ OP_BAS, "BAS", RX },
{ OP_CVD, "CVD", RX },
{ OP_CVB, "CVB", RX },
{ OP_ST, "ST", RX },
{ OP_N, "N", RX },
{ OP_CL, "CL", RX },
{ OP_O, "O", RX },
{ OP_X, "X", RX },
{ OP_L, "L", RX },
{ OP_C, "C", RX },
{ OP_A, "A", RX },
{ OP_S, "S", RX },
{ OP_M, "M", RX },
{ OP_D, "D", RX },
{ OP_AL, "AL", RX },
{ OP_SL, "SL", RX },
{ OP_STD, "STD", RX },
{ OP_MXD, "MXD", RX },
{ OP_LD, "LD", RX },
{ OP_CD, "CD", RX },
{ OP_AD, "AD", RX },
{ OP_SD, "SD", RX },
{ OP_MD, "MD", RX },
{ OP_DD, "DD", RX },
{ OP_AW, "AW", RX },
{ OP_SW, "SW", RX },
{ OP_STE, "STE", RX },
{ OP_LE, "LE", RX },
{ OP_CE, "CE", RX },
{ OP_AE, "AE", RX },
{ OP_SE, "SE", RX },
{ OP_ME, "ME", RX },
{ OP_DE, "DE", RX },
{ OP_AU, "AU", RX },
{ OP_SU, "SU", RX },
{ OP_SSM, "SSM", SI|ZEROOP },
{ OP_LPSW, "LPSW", SI|ZEROOP },
{ OP_DIAG, "DIAG", SI },
{ OP_BXH, "BXH", RS|TWOOP },
{ OP_BXLE, "BXLE", RS|TWOOP },
{ OP_SRL, "SRL", RS|ZEROOP },
{ OP_SLL, "SLL", RS|ZEROOP },
{ OP_SRA, "SRA", RS|ZEROOP },
{ OP_SLA, "SLA", RS|ZEROOP },
{ OP_SRDL, "SRDL", RS|ZEROOP },
{ OP_SLDL, "SLDL", RS|ZEROOP },
{ OP_SRDA, "SRDA", RS|ZEROOP },
{ OP_SLDA, "SLDA", RS|ZEROOP },
{ OP_STM, "STM", RS|TWOOP },
{ OP_TM, "TM", SI },
{ OP_MVI, "MVI", SI },
{ OP_TS, "TS", SI|ZEROOP },
{ OP_NI, "NI", SI },
{ OP_CLI, "CLI", SI },
{ OP_OI, "OI", SI },
{ OP_XI, "XI", SI },
{ OP_LM, "LM", RS|TWOOP },
{ OP_SIO, "SIO", SI|ZEROOP },
{ OP_TIO, "TIO", SI|ZEROOP },
{ OP_HIO, "HIO", SI|ZEROOP },
{ OP_TCH, "TCH", SI|ZEROOP },
{ OP_STMC, "STMC", RS|TWOOP },
{ OP_LRA, "LRA", RX },
{ OP_LMC, "LMC", RS|TWOOP },
{ OP_MVN, "MVN", SS },
{ OP_MVC, "MVC", SS },
{ OP_MVZ, "MVZ", SS },
{ OP_NC, "NC", SS },
{ OP_CLC, "CLC", SS },
{ OP_OC, "OC", SS },
{ OP_XC, "XC", SS },
{ OP_TR, "TR", SS },
{ OP_TRT, "TRT", SS },
{ OP_ED, "ED", SS },
{ OP_EDMK, "EDMK", SS },
{ OP_MVCIN, "MVCIN", SS },
{ OP_MVO, "MVO", SS|TWOOP },
{ OP_PACK, "PACK", SS|TWOOP },
{ OP_UNPK, "UNPK", SS|TWOOP },
{ OP_ZAP, "ZAP", SS|TWOOP },
{ OP_CP, "CP", SS|TWOOP },
{ OP_AP, "AP", SS|TWOOP },
{ OP_SP, "SP", SS|TWOOP },
{ OP_MP, "MP", SS|TWOOP },
{ OP_DP, "DP", SS|TWOOP },
{ OP_MVCL, "MVCL", RR },
{ OP_CLCL, "CLCL", RR },
{ OP_STNSM, "STNSM", SI },
{ OP_STOSM, "STOSM", SI },
{ OP_SIGP, "SIGP", RS },
{ OP_MC, "MC", SI },
{ OP_370, "", XX },
{ OP_STCTL, "STCTL", RS },
{ OP_LCTL, "LCTL", RS },
{ OP_CS, "CS", RS },
{ OP_CDS, "CDS", RS },
{ OP_CLM, "CLM", RS },
{ OP_STCM, "STCM", RS },
{ OP_ICM, "ICM", RS },
{ OP_SRP, "SRP", SS|TWOOP },
{ 0, NULL, 0 }
};
t_opcode soptab[] = {
{ 0x00, "CONCS", RS },
{ 0x01, "DISCS", RS },
{ 0x02, "STIDP", RS },
{ 0x03, "STIDC", RS },
{ 0x04, "SCK", RS },
{ 0x05, "STCK", RS },
{ 0x06, "SCKC", RS },
{ 0x07, "STCKC", RS },
{ 0x08, "SPT", RS },
{ 0x09, "STPT", RS },
{ 0x0A, "SPKA", RS },
{ 0x0B, "IPK", RS },
{ 0x0D, "PTLB", RS|ZEROOP },
{ 0x10, "SPX", RS },
{ 0x11, "STPX", RS },
{ 0x12, "STAP", RS },
{ 0x13, "RRB", RS },
{ 0, NULL, 0}
};
void fprint_inst(FILE *of, uint16 *val) {
uint8 inst = (val[0] >> 8) & 0xff;
t_opcode *tab;
for (tab = optab; tab->name != NULL; tab++) {
if (tab->opbase == inst) {
fputs(tab->name, of);
fputc(' ', of);
switch (tab->type & LNMSK) {
case RR:
if (tab->type & IMDOP) {
fprint_val(of, val[0] & 0xff, 16, 8, PV_RZRO);
} else {
if (tab->type & ONEOP)
fprintf(of, "%d", (val[0] >> 4) & 0xf);
else
fprintf(of, "%d,%d", (val[0] >> 4) & 0xf, val[0] & 0xf);
}
break;
case RX:
fprintf(of, "%d,", (val[0] >> 4) & 0xf);
fprint_val(of, val[1] & 0xfff, 16, 12, PV_RZRO);
fprintf(of, "(%d,%d)", val[0] & 0xf, (val[1] >> 12) & 0xf);
break;
case XX:
inst = val[0] & 0xff;
for (tab = soptab; tab->name != NULL; tab++) {
if (tab->opbase == inst) {
fputs(tab->name, of);
if ((tab->type & ZEROOP) == 0) {
fputc(' ', of);
fprint_val(of, val[1] & 0xfff, 16, 12, PV_RZRO);
if (val[1] & 0xf000)
fprintf(of, "(%d)", (val[1] >> 12) & 0xf);
}
break;
}
}
break;
case RS:
fprintf(of, "%d,", (val[0] >> 4) & 0xf);
if ((tab->type & ZEROOP) == 0)
fprintf(of, "%d,", val[0] & 0xf);
fprint_val(of, val[1] & 0xfff, 16, 12, PV_RZRO);
if (val[1] & 0xf000)
fprintf(of, "(%d)", (val[1] >> 12) & 0xf);
break;
case SI:
fprint_val(of, val[1] & 0xfff, 16, 12, PV_RZRO);
if (val[1] & 0xf000)
fprintf(of, "(%d)", (val[1] >> 12) & 0xf);
if ((tab->type & ZEROOP) == 0)
fprintf(of, ",%02x", val[0] & 0xff);
break;
case SS:
fprint_val(of, val[1] & 0xfff, 16, 12, PV_RZRO);
if (tab->type & TWOOP) {
fprintf(of, "(%d", (val[0] >> 4) & 0xf);
} else {
fprintf(of, "(%d", val[0] & 0xff);
}
if (val[1] & 0xf000)
fprintf(of, ",%d", (val[1] >> 12) & 0xf);
fprintf(of, "),");
fprint_val(of, val[2] & 0xfff, 16, 12, PV_RZRO);
if (tab->type & TWOOP) {
fprintf(of, "(%d,", val[0] & 0xf);
} else {
fprintf(of, "(");
}
fprintf(of, "%d)", (val[2] >> 12) & 0xf);
break;
}
break;
}
}
if (tab->name == NULL)
fprintf(of, "?%02x?", inst);
}
/* Symbolic decode
Inputs:
*of = output stream
addr = current PC
*val = pointer to values
*uptr = pointer to unit
sw = switches
Outputs:
return = status code
*/
t_stat fprint_sym (FILE *of, t_addr addr, t_value *val,
UNIT *uptr, int32 sw)
{
uint8 inst = (uint8)(*val & 0xff);
uint16 sval[4];
int i;
int l = 1;
int rdx = 16;
t_opcode *tab;
uint32 num;
if (sw & SWMASK ('D'))
rdx = 10;
else if (sw & SWMASK ('O'))
rdx = 8;
else if (sw & SWMASK ('H'))
rdx = 16;
if (sw & SWMASK ('M')) {
for (tab = optab; tab->name != NULL; tab++) {
if (tab->opbase == inst) {
switch (tab->type & LNMSK) {
case RR:
l = 2;
break;
case XX:
case RX:
case RS:
case SI:
l = 4;
break;
case SS:
l = 6;
}
}
}
sw &= ~ SWMASK('F'); /* Can't do F and M at same time */
} else if (sw & SWMASK('F')) {
l = 4;
} else if (sw & SWMASK('W')) {
l = 2;
} else if (sw & SWMASK('B')) {
l = 1;
}
if (sw & SWMASK ('C')) {
fputc('\'', of);
for(i = 0; i < l; i++) {
uint8 ch = ebcdic_to_ascii[val[i] & 0xff];
if (ch >= 0x20 && ch <= 0x7f)
fprintf(of, "%c", ch);
else
fputc('_', of);
}
fputc('\'', of);
} else if (sw & SWMASK ('M')) {
i = 0;
l = 0;
if ((inst & 0xC0) == 0xC0) {
num = (uint32)(val[i++] << 8);
num |= (uint32)val[i++];
sval[l++] = num;
fprint_val(of, num, 16, 16, PV_RZRO);
fputc(' ', of);
}
if ((inst & 0xC0) != 0) {
num = (uint32)(val[i++] << 8);
num |= (uint32)val[i++];
sval[l++] = num;
fprint_val(of, num, 16, 16, PV_RZRO);
fputc(' ', of);
}
num = (uint32)(val[i++] << 8);
num |= (uint32)val[i++];
sval[l++] = num;
fprint_val(of, num, 16, 16, PV_RZRO);
fputc(' ', of);
l = i;
for(; i < 6; i+=2)
fputs(" ", of);
fputc(' ', of);
fprint_inst(of, sval);
} else {
num = 0;
for (i = 0; i < l && i < 4; i++)
num |= (uint32)val[i] << ((l-i-1) * 8);
fprint_val(of, num, rdx, l*8, PV_RZRO);
}
return -(l-1);
}
/*
* Collect register name.
*/
t_stat get_reg (CONST char *cptr, CONST char **tptr, int *reg)
{
while (sim_isspace (*cptr)) cptr++;
if ((*cptr == 'R') || (*cptr == 'r')) /* Skip R */
cptr++;
if ((*cptr >= '0') && (*cptr <= '9')) {
*reg = *cptr++ - '0';
if ((*cptr >= '0') && (*cptr <= '9'))
*reg = (*reg * 10) + (*cptr++ - '0');
if (*reg > 0xf)
return SCPE_ARG;
} else if ((*cptr >= 'a') && (*cptr <= 'f'))
*reg = (*cptr++ - 'a') + 10;
else if ((*cptr >= 'A') && (*cptr <= 'F'))
*reg = (*cptr++ - 'A') + 10;
else
return SCPE_ARG;
while (sim_isspace (*cptr)) cptr++;
*tptr = cptr;
return SCPE_OK;;
}
/*
* Collect offset in radix.
*/
t_stat get_off (CONST char *cptr, CONST char **tptr, uint32 radix, uint32 *val, char *m)
{
t_stat r;
r = SCPE_OK;
*m = 0;
*val = (uint32)strtotv (cptr, tptr, radix);
if ((cptr == *tptr) || (*val > 0xfff))
r = SCPE_ARG;
else {
cptr = *tptr;
while (sim_isspace (*cptr)) cptr++;
if (*cptr++ == '(') {
*m = 1;
while (sim_isspace (*cptr)) cptr++;
}
*tptr = cptr;
}
return r;
}
/*
* Collect immediate in radix.
*/
t_stat get_imm (CONST char *cptr, CONST char **tptr, uint32 radix, uint32 *val)
{
t_stat r;
r = SCPE_OK;
*val = (uint32)strtotv (cptr, tptr, radix);
if ((cptr == *tptr) || (*val > 0xff))
r = SCPE_ARG;
else {
cptr = *tptr;
while (sim_isspace (*cptr)) cptr++;
*tptr = cptr;
}
return r;
}
/* Symbolic input
Inputs:
*cptr = pointer to input string
addr = current PC
uptr = pointer to unit
*val = pointer to output values
sw = switches
Outputs:
status = error status
*/
t_stat parse_sym (CONST char *cptr, t_addr addr, UNIT *uptr, t_value *val, int32 sw)
{
int i;
int l = 1;
int rdx = 16;
char mod = 0;
t_opcode *tab;
t_stat r;
uint32 num;
uint32 max[5] = { 0, 0xff, 0xffff, 0, 0xffffffff };
CONST char *tptr;
char gbuf[CBUFSIZE];
if (sw & SWMASK ('D'))
rdx = 10;
else if (sw & SWMASK ('O'))
rdx = 8;
else if (sw & SWMASK ('H'))
rdx = 16;
if (sw & SWMASK('F')) {
l = 4;
} else if (sw & SWMASK('W')) {
l = 2;
}
if (sw & SWMASK ('C')) {
cptr = get_glyph_quoted(cptr, gbuf, 0); /* Get string */
for(i = 0; gbuf[i] != 0; i++) {
val[i] = ascii_to_ebcdic[(int)gbuf[i]];
}
return -(i - 1);
}
if (sw & SWMASK ('M')) {
cptr = get_glyph(cptr, gbuf, 0); /* Get opcode */
for (tab = optab; tab->name != NULL; tab++) {
if (sim_strcasecmp(tab->name, gbuf) == 0)
break;
}
if (tab->name == NULL)
return SCPE_ARG;
val[0] = tab->opbase;
switch (tab->type & LNMSK) {
case RR:
if (tab->type & IMDOP) { /* Op number */
if ((r = get_imm(cptr, &tptr, rdx, &num)) != SCPE_OK)
return r;
val[1] = num;
} else { /* Op r,r or Op r */
if ((r = get_reg(cptr, &tptr, &i)) != SCPE_OK)
return r;
cptr = tptr;
val[1] = i << 4;
if (tab->type & ONEOP)
return -1;
if (*cptr != ',')
return SCPE_ARG;
cptr++;
if ((r = get_reg(cptr, &tptr, &i)) != SCPE_OK)
return r;
val[1] |= i;
}
return -1;
case RX: /* Op r,off(r,r) */
if ((r = get_reg(cptr, &tptr, &i)) != SCPE_OK)
return r;
cptr = tptr;
if (*cptr != ',')
return SCPE_ARG;
cptr++;
val[1] = i << 4;
if ((r = get_off(cptr, &tptr, rdx, &num, &mod)) != SCPE_OK)
return r;
cptr = tptr;
if (mod) {
if ((r = get_reg(cptr, &tptr, &i)) != SCPE_OK)
return r;
cptr = tptr;
val[1] |= i;
if (*cptr == ',') {
cptr++;
while (sim_isspace (*cptr)) cptr++;
if ((r = get_reg(cptr, &tptr, &i)) != SCPE_OK)
return r;
cptr = tptr;
num |= (i << 12);
}
if (*cptr != ')')
return SCPE_ARG;
}
val[2] = (num >> 8) & 0xff;
val[3] = num & 0xff;
return -3;
case RS: /* Op r,r,off(r) or Op r,off(r) */
if ((r = get_reg(cptr, &tptr, &i)) != SCPE_OK)
return r;
cptr = tptr;
val[1] = i << 4;
if (*cptr != ',')
return SCPE_ARG;
cptr++;
if ((tab->type & ZEROOP) == 0) {
if ((r = get_reg(cptr, &tptr, &i)) != SCPE_OK)
return r;
cptr = tptr;
val[1] |= i;
if (*cptr != ',')
return SCPE_ARG;
cptr++;
while (sim_isspace (*cptr)) cptr++;
}
if ((r = get_off(cptr, &tptr, rdx, &num, &mod)) != SCPE_OK)
return r;
cptr = tptr;
if (mod) {
if ((r = get_reg(cptr, &tptr, &i)) != SCPE_OK)
return r;
cptr = tptr;
num |= (i << 12);
if (*cptr != ')')
return SCPE_ARG;
}
val[2] = (num >> 8) & 0xff;
val[3] = num & 0xff;
return -3;
case SI: /* Op off(r),num */
if ((r = get_off(cptr, &tptr, rdx, &num, &mod)) != SCPE_OK)
return r;
cptr = tptr;
val[1] = 0;
if (mod) {
if ((r = get_reg(cptr, &tptr, &i)) != SCPE_OK)
return r;
cptr = tptr;
num |= (i << 12);
if (*cptr != ')')
return SCPE_ARG;
cptr++;
}
if ((tab->type & ZEROOP) == 0) {
if (*cptr != ',')
return SCPE_ARG;
cptr++;
if ((r = get_imm(cptr, &tptr, rdx, &num)) != SCPE_OK)
return r;
val[1] = num;
}
val[2] = (num >> 8) & 0xff;
val[3] = num & 0xff;
return -3;
case SS: /* Op off(l,r),off(l,r) or Op off(l,r),off(r) */
if ((r = get_off(cptr, &tptr, rdx, &num, &mod)) != SCPE_OK)
return r;
cptr = tptr;
if (mod) {
uint32 imm;
if ((r = get_imm(cptr, &tptr, rdx, &imm)) != SCPE_OK)
return r;
cptr = tptr;
if (tab->type & TWOOP) {
if (imm > 0xf)
return SCPE_ARG;
imm <<= 4;
}
val[1] = imm;
if (*cptr == ',') {
cptr++;
if ((r = get_reg(cptr, &tptr, &i)) != SCPE_OK)
return r;
cptr = tptr;
num |= (i << 12);
}
if (*cptr++ != ')')
return SCPE_ARG;
while (sim_isspace (*cptr)) cptr++;
}
if (*cptr++ != ',')
return SCPE_ARG;
val[2] = (num >> 8) & 0xff;
val[3] = num & 0xff;
if ((r = get_off(cptr, &tptr, rdx, &num, &mod)) != SCPE_OK)
return r;
cptr = tptr;
if (mod) {
if (tab->type & TWOOP) {
uint32 imm;
if ((r = get_imm(cptr, &tptr, rdx, &imm)) != SCPE_OK)
return r;
cptr = tptr;
if (imm > 0xf)
return SCPE_ARG;
val[1] |= imm;
if (*cptr++ != ',')
return SCPE_ARG;
}
if (*cptr != ')') {
if ((r = get_reg(cptr, &tptr, &i)) != SCPE_OK)
return r;
cptr = tptr;
num |= (i << 12);
}
if (*cptr != ')')
return SCPE_ARG;
}
val[4] = (num >> 8) & 0xff;
val[5] = num & 0xff;
return -5;
}
}
num = (uint32)(get_uint(cptr, rdx, max[l], &r) & 0xffffffff);
for (i = 0; i < l && i < 4; i++)
val[i] = (num >> (((l - 1) - i) * 8)) & 0xff;
return -(l-1);
}
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