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altera.c
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altera.c
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/*
* altera.c
*
* altera FPGA driver
*
* Copyright (C) Altera Corporation 1998-2001
* Copyright (C) 2010,2011 NetUP Inc.
* Copyright (C) 2010,2011 Igor M. Liplianin <liplianin@netup.ru>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
*
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include "altera.h"
#include "altera-jtag.h"
enum altera_fpga_opcode {
OP_NOP = 0,
OP_DUP,
OP_SWP,
OP_ADD,
OP_SUB,
OP_MULT,
OP_DIV,
OP_MOD,
OP_SHL,
OP_SHR,
OP_NOT,
OP_AND,
OP_OR,
OP_XOR,
OP_INV,
OP_GT,
OP_LT,
OP_RET,
OP_CMPS,
OP_PINT,
OP_PRNT,
OP_DSS,
OP_DSSC,
OP_ISS,
OP_ISSC,
OP_DPR = 0x1c,
OP_DPRL,
OP_DPO,
OP_DPOL,
OP_IPR,
OP_IPRL,
OP_IPO,
OP_IPOL,
OP_PCHR,
OP_EXIT,
OP_EQU,
OP_POPT,
OP_ABS = 0x2c,
OP_BCH0,
OP_PSH0 = 0x2f,
OP_PSHL = 0x40,
OP_PSHV,
OP_JMP,
OP_CALL,
OP_NEXT,
OP_PSTR,
OP_SINT = 0x47,
OP_ST,
OP_ISTP,
OP_DSTP,
OP_SWPN,
OP_DUPN,
OP_POPV,
OP_POPE,
OP_POPA,
OP_JMPZ,
OP_DS,
OP_IS,
OP_DPRA,
OP_DPOA,
OP_IPRA,
OP_IPOA,
OP_EXPT,
OP_PSHE,
OP_PSHA,
OP_DYNA,
OP_EXPV = 0x5c,
OP_COPY = 0x80,
OP_REVA,
OP_DSC,
OP_ISC,
OP_WAIT,
OP_VS,
OP_CMPA = 0xc0,
OP_VSC,
};
#define S(x) [x] = #x
const char *op_str[] = {
S(OP_NOP),
S(OP_DUP),
S(OP_SWP),
S(OP_ADD),
S(OP_SUB),
S(OP_MULT),
S(OP_DIV),
S(OP_MOD),
S(OP_SHL),
S(OP_SHR),
S(OP_NOT),
S(OP_AND),
S(OP_OR),
S(OP_XOR),
S(OP_INV),
S(OP_GT),
S(OP_LT),
S(OP_RET),
S(OP_CMPS),
S(OP_PINT),
S(OP_PRNT),
S(OP_DSS),
S(OP_DSSC),
S(OP_ISS),
S(OP_ISSC),
S(OP_DPR),
S(OP_DPRL),
S(OP_DPO),
S(OP_DPOL),
S(OP_IPR),
S(OP_IPRL),
S(OP_IPO),
S(OP_IPOL),
S(OP_PCHR),
S(OP_EXIT),
S(OP_EQU),
S(OP_POPT),
S(OP_ABS),
S(OP_BCH0),
S(OP_PSH0),
S(OP_PSHL),
S(OP_PSHV),
S(OP_JMP),
S(OP_CALL),
S(OP_NEXT),
S(OP_PSTR),
S(OP_SINT),
S(OP_ST),
S(OP_ISTP),
S(OP_DSTP),
S(OP_SWPN),
S(OP_DUPN),
S(OP_POPV),
S(OP_POPE),
S(OP_POPA),
S(OP_JMPZ),
S(OP_DS),
S(OP_IS),
S(OP_DPRA),
S(OP_DPOA),
S(OP_IPRA),
S(OP_IPOA),
S(OP_EXPT),
S(OP_PSHE),
S(OP_PSHA),
S(OP_DYNA),
S(OP_EXPV),
S(OP_COPY),
S(OP_REVA),
S(OP_DSC),
S(OP_ISC),
S(OP_WAIT),
S(OP_VS),
S(OP_CMPA),
S(OP_VSC),
};
#undef S
static inline uint16_t get_unaligned_be16(const uint8_t *p)
{
return p[0] << 8 | p[1];
}
static inline uint32_t get_unaligned_be32(const uint8_t *p)
{
return p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
}
static inline uint16_t get_unaligned_le16(const uint8_t *p)
{
return p[0] | p[1] << 8;
}
static inline uint32_t get_unaligned_le32(const uint8_t *p)
{
return p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24;
}
static inline void put_unaligned_le32(uint32_t val, uint8_t *p)
{
*p++ = val;
*p++ = val >> 8;
*p++ = val >> 16;
*p++ = val >> 24;
}
__attribute__ ((weak))
size_t strlcpy(char *dest, const char *src, size_t size)
{
size_t ret = strlen(src);
if (size) {
size_t len = (ret >= size) ? size - 1 : ret;
memcpy(dest, src, len);
dest[len] = '\0';
}
return ret;
}
/* This function checks if enough parameters are available on the stack. */
static int altera_check_stack(int stack_ptr, int count, int *status)
{
if (stack_ptr < count) {
*status = ALTERA_STACK_OVERFLOW;
return 0;
}
return 1;
}
int altera_execute(uint8_t *p, int32_t program_size, char *action,
struct altera_varinit *init_list, int32_t *error_address,
int *exit_code, int *format_version)
{
char msg_buff[ALTERA_MESSAGE_LENGTH + 1] = {0};
int32_t stack[ALTERA_STACK_SIZE] = {0};
struct altera_jtag _js, *js = &_js;
int status = 0;
uint32_t first_word = 0;
uint32_t action_table = 0;
uint32_t proc_table = 0;
uint32_t str_table = 0;
uint32_t sym_table = 0;
uint32_t data_sect = 0;
uint32_t code_sect = 0;
uint32_t debug_sect = 0;
uint32_t action_count = 0;
uint32_t proc_count = 0;
uint32_t sym_count = 0;
intptr_t *vars = NULL;
int32_t *var_size = NULL;
char *attrs = NULL;
uint8_t *proc_attributes = NULL;
uint32_t pc;
uint32_t opcode_address;
uint32_t args[3];
uint32_t opcode;
uint32_t name_id;
uint8_t charbuf[4];
int32_t tmp;
uint32_t variable_id;
uint8_t *charptr_tmp;
uint8_t *charptr_tmp2;
int32_t *ptr_tmp;
int version = 0;
int delta = 0;
int stack_ptr = 0;
uint32_t arg_count;
int done = 0;
int bad_opcode = 0;
uint32_t count;
uint32_t idx;
uint32_t idx2;
uint32_t i;
uint32_t uncomp_size;
uint32_t offset;
uint32_t value;
int current_proc = 0;
int reverse;
char *name;
/* Read header information */
if (program_size > 52) {
first_word = get_unaligned_be32(&p[0]);
version = (first_word & 1);
*format_version = version + 1;
delta = version * 8;
action_table = get_unaligned_be32(&p[4]);
proc_table = get_unaligned_be32(&p[8]);
str_table = get_unaligned_be32(&p[4 + delta]);
sym_table = get_unaligned_be32(&p[16 + delta]);
data_sect = get_unaligned_be32(&p[20 + delta]);
code_sect = get_unaligned_be32(&p[24 + delta]);
debug_sect = get_unaligned_be32(&p[28 + delta]);
action_count = get_unaligned_be32(&p[40 + delta]);
proc_count = get_unaligned_be32(&p[44 + delta]);
sym_count = get_unaligned_be32(&p[48 + (2 * delta)]);
}
if ((first_word != 0x4A414D00) && (first_word != 0x4A414D01)) {
done = 1;
status = ALTERA_IO_ERROR;
goto exit_done;
}
if (sym_count <= 0)
goto exit_done;
vars = calloc(1, sym_count * sizeof(intptr_t));
if (vars == NULL)
status = ALTERA_OUT_OF_MEMORY;
if (status == 0) {
var_size = calloc(1, sym_count * sizeof(int32_t));
if (var_size == NULL)
status = ALTERA_OUT_OF_MEMORY;
}
if (status == 0) {
attrs = calloc(1, sym_count);
if (attrs == NULL)
status = ALTERA_OUT_OF_MEMORY;
}
if ((status == 0) && (version > 0)) {
proc_attributes = calloc(1, proc_count);
if (proc_attributes == NULL)
status = ALTERA_OUT_OF_MEMORY;
}
if (status != 0)
goto exit_done;
delta = version * 2;
for (i = 0; i < sym_count; ++i) {
offset = (sym_table + ((11 + delta) * i));
value = get_unaligned_be32(&p[offset + 3 + delta]);
attrs[i] = p[offset];
/*
* use bit 7 of attribute byte to indicate that
* this buffer was dynamically allocated
* and should be freed later
*/
attrs[i] &= 0x7f;
var_size[i] = get_unaligned_be32(&p[offset + 7 + delta]);
/*
* Attribute bits:
* bit 0: 0 = read-only, 1 = read-write
* bit 1: 0 = not compressed, 1 = compressed
* bit 2: 0 = not initialized, 1 = initialized
* bit 3: 0 = scalar, 1 = array
* bit 4: 0 = Boolean, 1 = integer
* bit 5: 0 = declared variable,
* 1 = compiler created temporary variable
*/
if ((attrs[i] & 0x0c) == 0x04)
/* initialized scalar variable */
vars[i] = value;
else if ((attrs[i] & 0x1e) == 0x0e) {
/* initialized compressed Boolean array */
uncomp_size = get_unaligned_le32(&p[data_sect + value]);
/* allocate a buffer for the uncompressed data */
vars[i] = (intptr_t)calloc(1, uncomp_size);
if (vars[i] == 0)
status = ALTERA_OUT_OF_MEMORY;
else {
/* set flag so buffer will be freed later */
attrs[i] |= 0x80;
/* uncompress the data */
if (altera_shrink(&p[data_sect + value],
var_size[i],
(uint8_t *)vars[i],
uncomp_size,
version) != uncomp_size)
/* decompression failed */
status = ALTERA_IO_ERROR;
else
var_size[i] = uncomp_size * 8;
}
} else if ((attrs[i] & 0x1e) == 0x0c) {
/* initialized Boolean array */
vars[i] = value + data_sect + (intptr_t)p;
} else if ((attrs[i] & 0x1c) == 0x1c) {
/* initialized integer array */
vars[i] = value + data_sect;
} else if ((attrs[i] & 0x0c) == 0x08) {
/* uninitialized array */
/* flag attrs so that memory is freed */
attrs[i] |= 0x80;
if (var_size[i] > 0) {
uint32_t size;
if (attrs[i] & 0x10)
/* integer array */
size = (var_size[i] * sizeof(int32_t));
else
/* Boolean array */
size = ((var_size[i] + 7) / 8);
vars[i] = (intptr_t)calloc(1, size);
if (vars[i] == 0) {
status = ALTERA_OUT_OF_MEMORY;
}
} else
vars[i] = 0;
} else
vars[i] = 0;
if (trace) {
name_id = (version == 0)
? get_unaligned_be16(&p[offset + 1])
: get_unaligned_be32(&p[offset + 1]);
name = &p[str_table + name_id];
fprintf(stderr, "Variable #%d (%s) attrs=%x value=%" PRIxPTR " var_size=%d orig_value=%08x\n",
i, name, attrs[i], vars[i], var_size[i], value);
}
}
if (status != 0)
goto exit_done;
/* Initialize variables listed in init_list */
if (init_list) {
struct altera_varinit *iter = init_list;
do {
for (i = 0; i < sym_count; ++i) {
offset = (sym_table + ((11 + delta) * i));
name_id = (version == 0)
? get_unaligned_be16(&p[offset + 1])
: get_unaligned_be32(&p[offset + 1]);
name = &p[str_table + name_id];
if (strncasecmp(iter->name, name, strlen(name)) == 0)
vars[i] = iter->value;
}
} while ((iter = iter->next));
}
exit_done:
if (status != 0)
done = 1;
altera_jinit(js);
pc = code_sect;
msg_buff[0] = '\0';
/*
* For JBC version 2, we will execute the procedures corresponding to
* the selected ACTION
*/
if (version > 0) {
if (action == NULL) {
status = ALTERA_ACTION_NOT_FOUND;
done = 1;
} else {
int action_found = 0;
for (i = 0; (i < action_count) && !action_found; ++i) {
name_id = get_unaligned_be32(&p[action_table +
(12 * i)]);
name = &p[str_table + name_id];
if (strncasecmp(action, name, strlen(name)) == 0) {
action_found = 1;
current_proc =
get_unaligned_be32(&p[action_table +
(12 * i) + 8]);
}
}
if (!action_found) {
status = ALTERA_ACTION_NOT_FOUND;
done = 1;
}
}
if (status == 0) {
int first_time = 1;
i = current_proc;
while ((i != 0) || first_time) {
first_time = 0;
/* check procedure attribute byte */
proc_attributes[i] = (p[proc_table + (13 * i) + 8] & 0x03);
/*
* BIT0 - OPTIONAL
* BIT1 - RECOMMENDED
* BIT6 - FORCED OFF
* BIT7 - FORCED ON
*/
if (init_list) {
struct altera_varinit *iter = init_list;
name_id = get_unaligned_be32(&p[proc_table + (13 * i)]);
name = &p[str_table + name_id];
do {
if (strncasecmp(iter->name, name, strlen(name)) == 0)
proc_attributes[i] |= iter->value ? 0x80 : 0x40;
} while ((iter = iter->next));
}
i = get_unaligned_be32(&p[proc_table + (13 * i) + 4]);
}
/*
* Set current_proc to the first procedure
* to be executed
*/
i = current_proc;
while ((i != 0) && ((proc_attributes[i] == 1)
|| ((proc_attributes[i] & 0xc0) == 0x40))) {
i = get_unaligned_be32(&p[proc_table + (13 * i) + 4]);
}
if ((i != 0) || ((i == 0) && (current_proc == 0)
&& ((proc_attributes[0] != 1)
&& ((proc_attributes[0] & 0xc0) != 0x40)))) {
current_proc = i;
pc = code_sect + get_unaligned_be32(&p[proc_table + (13 * i) + 9]);
if ((pc < code_sect) || (pc >= debug_sect))
status = ALTERA_BOUNDS_ERROR;
} else
/* there are no procedures to execute! */
done = 1;
}
}
msg_buff[0] = '\0';
while (!done) {
opcode = (p[pc] & 0xff);
opcode_address = pc;
++pc;
if (trace)
fprintf(stderr, "%06x: %-7s ", pc, op_str[opcode]);
arg_count = (opcode >> 6) & 3;
for (i = 0; i < arg_count; ++i) {
args[i] = get_unaligned_be32(&p[pc]);
pc += 4;
}
if (trace)
for (i = 0; i < arg_count; i++)
fprintf(stderr, "arg%d=%08x ", i, (uint32_t)args[i]);
switch (opcode) {
case OP_NOP:
break;
case OP_DUP:
if (altera_check_stack(stack_ptr, 1, &status)) {
stack[stack_ptr] = stack[stack_ptr - 1];
++stack_ptr;
}
break;
case OP_SWP:
if (altera_check_stack(stack_ptr, 2, &status)) {
tmp = stack[stack_ptr - 2];
stack[stack_ptr - 2] = stack[stack_ptr - 1];
stack[stack_ptr - 1] = tmp;
}
break;
case OP_ADD:
if (altera_check_stack(stack_ptr, 2, &status)) {
--stack_ptr;
stack[stack_ptr - 1] += stack[stack_ptr];
}
break;
case OP_SUB:
if (altera_check_stack(stack_ptr, 2, &status)) {
--stack_ptr;
stack[stack_ptr - 1] -= stack[stack_ptr];
}
break;
case OP_MULT:
if (altera_check_stack(stack_ptr, 2, &status)) {
--stack_ptr;
stack[stack_ptr - 1] *= stack[stack_ptr];
}
break;
case OP_DIV:
if (altera_check_stack(stack_ptr, 2, &status)) {
--stack_ptr;
stack[stack_ptr - 1] /= stack[stack_ptr];
}
break;
case OP_MOD:
if (altera_check_stack(stack_ptr, 2, &status)) {
--stack_ptr;
stack[stack_ptr - 1] %= stack[stack_ptr];
}
break;
case OP_SHL:
if (altera_check_stack(stack_ptr, 2, &status)) {
--stack_ptr;
stack[stack_ptr - 1] <<= stack[stack_ptr];
}
break;
case OP_SHR:
if (altera_check_stack(stack_ptr, 2, &status)) {
--stack_ptr;
stack[stack_ptr - 1] >>= stack[stack_ptr];
}
break;
case OP_NOT:
if (altera_check_stack(stack_ptr, 1, &status))
stack[stack_ptr - 1] ^= -1;
break;
case OP_AND:
if (altera_check_stack(stack_ptr, 2, &status)) {
--stack_ptr;
stack[stack_ptr - 1] &= stack[stack_ptr];
}
break;
case OP_OR:
if (altera_check_stack(stack_ptr, 2, &status)) {
--stack_ptr;
stack[stack_ptr - 1] |= stack[stack_ptr];
}
break;
case OP_XOR:
if (altera_check_stack(stack_ptr, 2, &status)) {
--stack_ptr;
stack[stack_ptr - 1] ^= stack[stack_ptr];
}
break;
case OP_INV:
if (!altera_check_stack(stack_ptr, 1, &status))
break;
stack[stack_ptr - 1] = stack[stack_ptr - 1] ? 0 : 1;
break;
case OP_GT:
if (!altera_check_stack(stack_ptr, 2, &status))
break;
--stack_ptr;
stack[stack_ptr - 1] =
(stack[stack_ptr - 1] > stack[stack_ptr]) ?
1 : 0;
break;
case OP_LT:
if (!altera_check_stack(stack_ptr, 2, &status))
break;
--stack_ptr;
stack[stack_ptr - 1] =
(stack[stack_ptr - 1] < stack[stack_ptr]) ?
1 : 0;
break;
case OP_RET:
if ((version > 0) && (stack_ptr == 0)) {
/*
* We completed one of the main procedures
* of an ACTION.
* Find the next procedure
* to be executed and jump to it.
* If there are no more procedures, then EXIT.
*/
i = get_unaligned_be32(&p[proc_table +
(13 * current_proc) + 4]);
while ((i != 0) &&
((proc_attributes[i] == 1) ||
((proc_attributes[i] & 0xc0) == 0x40)))
i = get_unaligned_be32(&p[proc_table +
(13 * i) + 4]);
if (i == 0) {
/* no procedures to execute! */
done = 1;
*exit_code = 0; /* success */
} else {
if (trace) {
name_id = get_unaligned_be32(&p[proc_table + (13 * i)]);
name = &p[str_table + name_id];
fprintf(stderr, "PROC#%d[%s] ", i, name);
}
current_proc = i;
pc = code_sect + get_unaligned_be32(
&p[proc_table +
(13 * i) + 9]);
if ((pc < code_sect) ||
(pc >= debug_sect))
status = ALTERA_BOUNDS_ERROR;
}
} else
if (altera_check_stack(stack_ptr, 1, &status)) {
pc = stack[--stack_ptr] + code_sect;
if ((pc <= code_sect) ||
(pc >= debug_sect))
status = ALTERA_BOUNDS_ERROR;
}
break;
case OP_CMPS:
/*
* Array short compare
* ...stack 0 is source 1 value
* ...stack 1 is source 2 value
* ...stack 2 is mask value
* ...stack 3 is count
*/
if (altera_check_stack(stack_ptr, 4, &status)) {
int32_t a = stack[--stack_ptr];
int32_t b = stack[--stack_ptr];
tmp = stack[--stack_ptr];
count = stack[stack_ptr - 1];
if ((count < 1) || (count > 32))
status = ALTERA_BOUNDS_ERROR;
else {
tmp &= ((-1) >> (32 - count));
stack[stack_ptr - 1] =
((a & tmp) == (b & tmp))
? 1 : 0;
}
}
break;
case OP_PINT:
/*
* PRINT add integer
* ...stack 0 is integer value
*/
if (!altera_check_stack(stack_ptr, 1, &status))
break;
sprintf(&msg_buff[strlen(msg_buff)],
"%d", stack[--stack_ptr]);
break;
case OP_PRNT:
/* PRINT finish */
altera_message(msg_buff);
msg_buff[0] = '\0';
break;
case OP_DSS:
/*
* DRSCAN short
* ...stack 0 is scan data
* ...stack 1 is count
*/
if (!altera_check_stack(stack_ptr, 2, &status))
break;
tmp = stack[--stack_ptr];
count = stack[--stack_ptr];
put_unaligned_le32(tmp, &charbuf[0]);
status = altera_drscan(js, count, charbuf, 0);
break;
case OP_DSSC:
/*
* DRSCAN short with capture
* ...stack 0 is scan data
* ...stack 1 is count
*/
if (!altera_check_stack(stack_ptr, 2, &status))
break;
tmp = stack[--stack_ptr];
count = stack[stack_ptr - 1];
put_unaligned_le32(tmp, &charbuf[0]);
status = altera_swap_dr(js, count, charbuf,
0, charbuf, 0);
stack[stack_ptr - 1] = get_unaligned_le32(&charbuf[0]);
break;
case OP_ISS:
/*
* IRSCAN short
* ...stack 0 is scan data
* ...stack 1 is count
*/
if (!altera_check_stack(stack_ptr, 2, &status))
break;
tmp = stack[--stack_ptr];
count = stack[--stack_ptr];
put_unaligned_le32(tmp, &charbuf[0]);
status = altera_irscan(js, count, charbuf, 0);
break;
case OP_ISSC:
/*
* IRSCAN short with capture
* ...stack 0 is scan data
* ...stack 1 is count
*/
if (!altera_check_stack(stack_ptr, 2, &status))
break;
tmp = stack[--stack_ptr];
count = stack[stack_ptr - 1];
put_unaligned_le32(tmp, &charbuf[0]);
status = altera_swap_ir(js, count, charbuf,
0, charbuf, 0);
stack[stack_ptr - 1] = get_unaligned_le32(&charbuf[0]);
break;
case OP_DPR:
if (!altera_check_stack(stack_ptr, 1, &status))
break;
count = stack[--stack_ptr];
status = altera_set_dr_pre(js, count, 0, NULL);
break;
case OP_DPRL:
/*
* DRPRE with literal data
* ...stack 0 is count
* ...stack 1 is literal data
*/
if (!altera_check_stack(stack_ptr, 2, &status))
break;
count = stack[--stack_ptr];
tmp = stack[--stack_ptr];
put_unaligned_le32(tmp, &charbuf[0]);
status = altera_set_dr_pre(js, count, 0,
charbuf);
break;
case OP_DPO:
/*
* DRPOST
* ...stack 0 is count
*/
if (altera_check_stack(stack_ptr, 1, &status)) {
count = stack[--stack_ptr];
status = altera_set_dr_post(js, count,
0, NULL);
}
break;
case OP_DPOL:
/*
* DRPOST with literal data
* ...stack 0 is count
* ...stack 1 is literal data
*/
if (!altera_check_stack(stack_ptr, 2, &status))
break;
count = stack[--stack_ptr];
tmp = stack[--stack_ptr];
put_unaligned_le32(tmp, &charbuf[0]);
status = altera_set_dr_post(js, count, 0,
charbuf);
break;
case OP_IPR:
if (altera_check_stack(stack_ptr, 1, &status)) {
count = stack[--stack_ptr];
status = altera_set_ir_pre(js, count,
0, NULL);
}
break;
case OP_IPRL:
/*
* IRPRE with literal data
* ...stack 0 is count
* ...stack 1 is literal data
*/
if (altera_check_stack(stack_ptr, 2, &status)) {
count = stack[--stack_ptr];
tmp = stack[--stack_ptr];
put_unaligned_le32(tmp, &charbuf[0]);
status = altera_set_ir_pre(js, count,
0, charbuf);
}
break;
case OP_IPO:
/*
* IRPOST
* ...stack 0 is count
*/
if (altera_check_stack(stack_ptr, 1, &status)) {
count = stack[--stack_ptr];
status = altera_set_ir_post(js, count,
0, NULL);
}
break;
case OP_IPOL:
/*
* IRPOST with literal data
* ...stack 0 is count
* ...stack 1 is literal data
*/
if (!altera_check_stack(stack_ptr, 2, &status))
break;
count = stack[--stack_ptr];
tmp = stack[--stack_ptr];
put_unaligned_le32(tmp, &charbuf[0]);
status = altera_set_ir_post(js, count, 0,
charbuf);
break;
case OP_PCHR:
if (altera_check_stack(stack_ptr, 1, &status)) {
uint8_t ch;
count = strlen(msg_buff);
ch = (char) stack[--stack_ptr];
if ((ch < 1) || (ch > 127)) {
/*
* character code out of range
* instead of flagging an error,
* force the value to 127
*/
ch = 127;
}
msg_buff[count] = ch;
msg_buff[count + 1] = '\0';
}
break;
case OP_EXIT:
if (altera_check_stack(stack_ptr, 1, &status))
*exit_code = stack[--stack_ptr];
done = 1;
break;
case OP_EQU:
if (!altera_check_stack(stack_ptr, 2, &status))
break;
--stack_ptr;
stack[stack_ptr - 1] =
(stack[stack_ptr - 1] == stack[stack_ptr]) ?
1 : 0;
break;
case OP_POPT:
if (altera_check_stack(stack_ptr, 1, &status))
--stack_ptr;
break;
case OP_ABS:
if (!altera_check_stack(stack_ptr, 1, &status))
break;
if (stack[stack_ptr - 1] < 0)
stack[stack_ptr - 1] = 0 - stack[stack_ptr - 1];
break;
case OP_BCH0:
/*
* Batch operation 0
* SWP
* SWPN 7
* SWP
* SWPN 6
* DUPN 8
* SWPN 2
* SWP
* DUPN 6
* DUPN 6
*/
/* SWP */
if (altera_check_stack(stack_ptr, 2, &status)) {
tmp = stack[stack_ptr - 2];
stack[stack_ptr - 2] = stack[stack_ptr - 1];
stack[stack_ptr - 1] = tmp;
}
/* SWPN 7 */
idx = 7 + 1;
if (altera_check_stack(stack_ptr, idx, &status)) {
tmp = stack[stack_ptr - idx];
stack[stack_ptr - idx] = stack[stack_ptr - 1];
stack[stack_ptr - 1] = tmp;
}
/* SWP */
if (altera_check_stack(stack_ptr, 2, &status)) {
tmp = stack[stack_ptr - 2];
stack[stack_ptr - 2] = stack[stack_ptr - 1];
stack[stack_ptr - 1] = tmp;
}