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FACT_vm.c
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FACT_vm.c
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/* This file is part of FACT.
*
* FACT 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 3 of the License, or
* (at your option) any later version.
*
* FACT 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 FACT. If not, see <http://www.gnu.org/licenses/>.
*/
#include "FACT.h"
#include "FACT_vm.h"
#include "FACT_opcodes.h"
#include "FACT_types.h"
#include "FACT_hash.h"
#include "FACT_alloc.h"
#include "FACT_var.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <gmp.h>
static void *Furlow_thread_mask(void *);
static inline size_t get_seg_addr(char *);
/* Threading and stacks: */
size_t num_threads; /* Number of threads. */
FACT_thread_t threads; /* Thread data. */
__thread FACT_thread_t curr_thread; /* Specific data to thread. */
/* Locks: */
pthread_mutex_t progm_lock = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t threads_lock = PTHREAD_MUTEX_INITIALIZER;
/* Error recovery: */
__thread jmp_buf handle_err; /* Jump to the error handler. */
__thread jmp_buf recover; /* When there are no other options. */
/* The machine: */
static char **progm; /* Program being run. */
static char **next_inst; /* Next available instruction. */
static void print_var_stack ();
/* Global variables: */
FACT_table_t Furlow_globals = {
.buckets = NULL,
.num_buckets = 0,
.num_entries = 0,
};
void Furlow_add_instruction (char *new) /* Add an instruction to the progm. */
{
size_t nsize;
static char halt_nowrite[1] = { HALT };
if (progm == NULL) { /* No program yet. */
next_inst = progm = FACT_malloc (sizeof (char *) * 2);
*progm = new;
*++next_inst = halt_nowrite;
} else {
*next_inst = new;
nsize = next_inst - progm + 1;
progm = FACT_realloc (progm, sizeof (char *) * (nsize + 1));
next_inst = progm + nsize;
*next_inst = halt_nowrite;
}
}
inline void
Furlow_lock_program(void) /* Lock progm. */
{
pthread_mutex_lock(&progm_lock);
}
inline void
Furlow_lock_threads(void) /* Lock threads, not the individual threads. */
{
pthread_mutex_lock(&threads_lock);
}
inline void
Furlow_unlock_program(void) /* Unlock progm. */
{
pthread_mutex_unlock(&progm_lock);
}
inline void
Furlow_unlock_threads(void) /* Unlock threads. */
{
pthread_mutex_unlock(&threads_lock);
}
inline size_t
Furlow_offset(void) /* Get the instruction offset. */
{
/* Return the number of instructions there are, minus the terminating HALT. */
return (((next_inst - progm) == 0)
? 0
: (next_inst - progm));
}
FACT_t
pop_v() /* Pop the variable stack. */
{
FACT_t res;
size_t diff;
#ifdef SAFE
if (curr_thread->vstackp < curr_thread->vstack)
FACT_throw_error(CURR_THIS, "illegal POP on empty var stack");
#endif /* SAFE */
diff = curr_thread->vstackp - curr_thread->vstack;
if (diff > 0 &&
curr_thread->vstack_size % diff == 0 &&
curr_thread->vstack_size / diff == 4) {
curr_thread->vstack_size >>= 1; /* Divide by two. */
curr_thread->vstack = FACT_realloc(curr_thread->vstack, sizeof(FACT_t) * curr_thread->vstack_size);
curr_thread->vstackp = curr_thread->vstack + diff;
}
res = *curr_thread->vstackp;
curr_thread->vstackp->ap = NULL;
curr_thread->vstackp--;
return res;
}
struct cstack_t
pop_c() /* Pop the current call stack. */
{
size_t diff;
struct cstack_t res;
#ifdef SAFE
if (curr_thread->cstackp < curr_thread->cstack)
FACT_throw_error(CURR_THIS, "illegal POP on empty call stack");
#endif /* SAFE */
diff = curr_thread->cstackp - curr_thread->cstack;
if (diff > 0 &&
curr_thread->cstack_size % diff == 0 &&
curr_thread->cstack_size / diff == 4) {
curr_thread->cstack_size >>= 1;
curr_thread->cstack = FACT_realloc(curr_thread->cstack, sizeof(struct cstack_t) * curr_thread->cstack_size);
curr_thread->cstackp = curr_thread->cstack + diff;
}
res = *curr_thread->cstackp;
curr_thread->cstackp->this = NULL;
curr_thread->cstackp--;
return res;
}
size_t *
pop_t() /* Pop the trap stack. */
{
size_t *res;
#ifdef SAFE
if (curr_thread->traps == NULL)
FACT_throw_error(CURR_THIS, "no traps currently set.");
#endif /* SAFE */
res = FACT_malloc(sizeof(size_t) * 2);
curr_thread->num_traps--;
memcpy (res, curr_thread->traps[curr_thread->num_traps], sizeof(size_t [2]));
if (curr_thread->num_traps)
curr_thread->traps = FACT_realloc(curr_thread->traps, sizeof(size_t [2]) * curr_thread->num_traps);
else {
FACT_free(curr_thread->traps);
curr_thread->traps = NULL;
}
return res;
}
void
push_v(FACT_t n) /* Push to the variable stack. */
{
size_t diff;
curr_thread->vstackp++;
diff = curr_thread->vstackp - curr_thread->vstack;
if (diff >= curr_thread->vstack_size) {
if (curr_thread->vstack_size == 0) {
curr_thread->vstack_size = 1;
diff = 0;
} else
curr_thread->vstack_size <<= 1; /* Square the size of the var stack. */
curr_thread->vstack = FACT_realloc(curr_thread->vstack, sizeof(FACT_t) * (curr_thread->vstack_size));
curr_thread->vstackp = curr_thread->vstack + diff;
}
*curr_thread->vstackp = n;
}
void push_c (size_t nip, FACT_scope_t nthis) /* Push to the call stack. */
{
size_t diff;
curr_thread->cstackp++;
diff = curr_thread->cstackp - curr_thread->cstack;
if (diff >= curr_thread->cstack_size) {
/* Square the size of the call stack. The call stack should never be NULL. */
// printf ("ALLOCATION: %zu >= %zu\n", diff, curr_thread->cstack_size);
curr_thread->cstack_size <<= 1;
curr_thread->cstack = FACT_realloc (curr_thread->cstack, sizeof (struct cstack_t) * (curr_thread->cstack_size));
curr_thread->cstackp = curr_thread->cstack + diff;
}
curr_thread->cstackp->ip = nip;
curr_thread->cstackp->this = nthis;
}
void push_t (size_t n1, size_t n2) /* Push to the trap stack. */
{
curr_thread->num_traps++;
curr_thread->traps = FACT_realloc (curr_thread->traps, sizeof (size_t [2]) * (curr_thread->num_traps));
curr_thread->traps[curr_thread->num_traps - 1][0] = n1;
curr_thread->traps[curr_thread->num_traps - 1][1] = n2;
}
FACT_t *Furlow_register (int reg_number) /* Access a Furlow machine register. */
{
static const void *jmp_table[] = {
&&h_rPOP,
&&h_rTOP,
&&h_rTID,
&&h_rGEN
};
goto *jmp_table[Min (reg_number, R_I)]; /* R_I is the first general register. */
h_rPOP:
curr_thread->registers[R_POP] = pop_v ();
return &curr_thread->registers[R_POP];
h_rTOP:
if (curr_thread->vstackp < curr_thread->vstack)
FACT_throw_error (CURR_THIS, "illegal TOP on empty stack");
return curr_thread->vstackp;
h_rTID:
if (curr_thread->registers[R_TID].type != NUM_TYPE) {
curr_thread->registers[R_TID].type = NUM_TYPE;
curr_thread->registers[R_TID].ap = FACT_alloc_num ();
}
mpc_set_ui (((FACT_num_t) curr_thread->registers[R_TID].ap)->value,
curr_thread - threads);
/* Fall through. */
h_rGEN:
return &curr_thread->registers[reg_number];
#if 0
switch (reg_number) {
case R_POP:
curr_thread->registers[R_POP] = pop_v ();
break;
case R_TOP:
if (curr_thread->vstackp < curr_thread->vstack)
FACT_throw_error (CURR_THIS, "illegal TOP on empty stack");
return curr_thread->vstackp;
case R_TID:
if (curr_thread->registers[R_TID].type != NUM_TYPE) {
curr_thread->registers[R_TID].type = NUM_TYPE;
curr_thread->registers[R_TID].ap = FACT_alloc_num ();
}
mpc_set_ui (((FACT_num_t) curr_thread->registers[R_TID].ap)->value,
curr_thread - threads);
break;
default:
break;
}
/* Probably best to add some extra checks here. */
return &curr_thread->registers[reg_number];
#endif
}
void *Furlow_reg_val (int reg_number, FACT_type des) /* Safely access a register's value. */
{
FACT_t *reg;
reg = Furlow_register (reg_number);
if (reg->type == UNSET_TYPE)
FACT_throw_error (CURR_THIS, "unset register, $r%d", reg_number);
/* If des is UNSET_TYPE, just return the register. */
if (des != UNSET_TYPE && reg->type != des)
FACT_throw_error (CURR_THIS, "register $r%d is type %s",
reg_number, des == NUM_TYPE ? "scope, expected number" : "number, expected scope");
return reg->ap;
}
void Furlow_run () /* Run the program until a HALT is reached. */
{
int i;
char *hold_name;
size_t tnum;
FACT_thread_t next;
struct cstack_t cs_arg;
register FACT_t args[4]; /* Maximum of three arguments plus the result per opcode. */
register FACT_t *reg_args[4]; /* For register operations. */
static const void *inst_jump_table[] = { /* Jump table to each instruction. */
#define ENTRY(n) [n] = &&INST_##n
ENTRY (ADD),
ENTRY (AND),
ENTRY (APPEND),
ENTRY (CALL),
ENTRY (CEQ),
ENTRY (CLE),
ENTRY (CLT),
ENTRY (CME),
ENTRY (CMT),
ENTRY (CNE),
ENTRY (CONSTS),
ENTRY (CONSTI),
ENTRY (CONSTU),
ENTRY (DEC),
ENTRY (DEF_N),
ENTRY (DEF_S),
ENTRY (DIE),
ENTRY (DIV),
ENTRY (DROP),
ENTRY (DUP),
ENTRY (ELEM),
ENTRY (EXIT),
ENTRY (GLOBAL),
ENTRY (GOTO),
/* ENTRY (GROUP), */
ENTRY (HALT),
ENTRY (INC),
ENTRY (IOR),
ENTRY (IS_AUTO),
ENTRY (IS_DEF),
ENTRY (JMP),
ENTRY (JMP_PNT),
ENTRY (JIF),
ENTRY (JIN),
ENTRY (JIS),
ENTRY (JIT),
ENTRY (LAMBDA),
ENTRY (LOCK),
ENTRY (MOD),
ENTRY (MUL),
ENTRY (NAME),
ENTRY (NEG),
ENTRY (NEW_N),
ENTRY (NEW_S),
ENTRY (NOP),
ENTRY (PURGE),
ENTRY (REF),
ENTRY (RET),
ENTRY (SET_C),
ENTRY (SET_F),
ENTRY (SPRT),
ENTRY (STO),
ENTRY (SUB),
ENTRY (SWAP),
ENTRY (THIS),
ENTRY (TRAP_B),
ENTRY (TRAP_E),
ENTRY (USE),
ENTRY (VAR),
ENTRY (VA_ADD),
ENTRY (XOR)
};
/* Define an instruction's code segment. */
#define SEG(x) INST_##x: do { 0; } while (0)
#define END_SEG() do { goto *inst_jump_table[progm[++CURR_IP][0]]; } while (0)
#define NEXT_INST() END_SEG()
curr_thread->run_flag = T_LIVE; /* The thread is now live. */
eval:
/* Set the error handler. */
if (setjmp (handle_err)) {
/* An error has been caught. If there are no available traps, jump to
* recover. Otherwise, set the ip to the current trap handler.
*/
if (curr_thread->num_traps == 0)
longjmp (recover, 1);
/* Destroy the unecessary stacks and set the ip. */
while ((curr_thread->cstackp - curr_thread->cstack + 1)
> curr_thread->traps[curr_thread->num_traps - 1][1])
pop_c ();
CURR_IP = curr_thread->traps[curr_thread->num_traps - 1][0];
curr_thread->run_flag = T_LIVE;
goto eval; /* Go back to eval to reset the error handler. */
}
/* Jump to the first instruction. */
goto *inst_jump_table [progm[CURR_IP][0]];
/* Instructions are divided into "segments." Each segment contains the
* code executed by one instruction. The macro SEG (n) creates a goto
* label for the instruction n, and the macro END_SEG jumps to the
* next instruction. Slightly confusing, but decently fast.
*/
SEG (ADD);
{
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], NUM_TYPE);
args[1].ap = Furlow_reg_val (progm[CURR_IP][2], NUM_TYPE);
args[2].ap = Furlow_reg_val (progm[CURR_IP][3], NUM_TYPE);
if (FACT_cast_to_num (args[2])->locked)
FACT_throw_error (CURR_THIS, "cannot set immutable variable");
mpc_add (((FACT_num_t) args[2].ap)->value,
((FACT_num_t) args[1].ap)->value,
((FACT_num_t) args[0].ap)->value);
}
END_SEG ();
SEG (AND);
{
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], NUM_TYPE);
args[1].ap = Furlow_reg_val (progm[CURR_IP][2], NUM_TYPE);
args[2].ap = Furlow_reg_val (progm[CURR_IP][3], NUM_TYPE);
if (FACT_cast_to_num (args[2])->locked)
FACT_throw_error (CURR_THIS, "cannot set immutable variable");
if (mpc_is_float (((FACT_num_t) args[0].ap)->value) ||
mpc_is_float (((FACT_num_t) args[1].ap)->value))
FACT_throw_error (CURR_THIS, "arguments to bitwise operators cannot be floating point");
mpc_and (((FACT_num_t) args[2].ap)->value,
((FACT_num_t) args[1].ap)->value,
((FACT_num_t) args[0].ap)->value);
}
END_SEG ();
SEG (APPEND);
{
args[0] = *Furlow_register (progm[CURR_IP][1]);
args[1] = *Furlow_register (progm[CURR_IP][2]);
if (args[1].type == NUM_TYPE) {
if (args[0].type == SCOPE_TYPE)
FACT_throw_error (CURR_THIS, "cannot append a scope to a number");
FACT_append_num (args[1].ap, args[0].ap);
} else {
if (args[0].type == NUM_TYPE)
FACT_throw_error (CURR_THIS, "cannot append a number to a scope");
FACT_append_scope (args[1].ap, args[0].ap);
}
}
END_SEG ();
SEG (CALL);
{
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], SCOPE_TYPE);
push_c (*(FACT_cast_to_scope (args[0])->code) - 1, args[0].ap);
/* Check if extrn_func is set, and if so call it. */
if (FACT_cast_to_scope (args[0])->extrn_func == NULL)
NEXT_INST ();
FACT_cast_to_scope (args[0])->extrn_func ();
/* Close any open trap regions. */
while (curr_thread->num_traps != 0
&& curr_thread->traps[curr_thread->num_traps][1] == curr_thread->cstack_size)
pop_t ();
/* Pop the call stack. */
pop_c ();
}
END_SEG ();
SEG (CEQ);
{
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], NUM_TYPE);
args[1].ap = Furlow_reg_val (progm[CURR_IP][2], NUM_TYPE);
args[2].ap = Furlow_reg_val (progm[CURR_IP][3], NUM_TYPE);
if (FACT_cast_to_num (args[2])->locked)
FACT_throw_error (CURR_THIS, "cannot set immutable variable");
mpc_set_ui (FACT_cast_to_num (args[2])->value,
(FACT_compare_num (args[1].ap, args[0].ap) == 0
? 1
: 0));
}
END_SEG ();
SEG (CLE);
{
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], NUM_TYPE);
args[1].ap = Furlow_reg_val (progm[CURR_IP][2], NUM_TYPE);
args[2].ap = Furlow_reg_val (progm[CURR_IP][3], NUM_TYPE);
if (FACT_cast_to_num (args[2])->locked)
FACT_throw_error (CURR_THIS, "cannot set immutable variable");
mpc_set_ui (FACT_cast_to_num (args[2])->value,
(FACT_compare_num (args[1].ap, args[0].ap) <= 0
? 1
: 0));
}
END_SEG ();
SEG (CLT);
{
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], NUM_TYPE);
args[1].ap = Furlow_reg_val (progm[CURR_IP][2], NUM_TYPE);
args[2].ap = Furlow_reg_val (progm[CURR_IP][3], NUM_TYPE);
if (FACT_cast_to_num (args[2])->locked)
FACT_throw_error (CURR_THIS, "cannot set immutable variable");
mpc_set_ui (FACT_cast_to_num (args[2])->value,
(FACT_compare_num (args[1].ap, args[0].ap) < 0
? 1
: 0));
}
END_SEG ();
SEG (CME);
{
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], NUM_TYPE);
args[1].ap = Furlow_reg_val (progm[CURR_IP][2], NUM_TYPE);
args[2].ap = Furlow_reg_val (progm[CURR_IP][3], NUM_TYPE);
if (FACT_cast_to_num (args[2])->locked)
FACT_throw_error (CURR_THIS, "cannot set immutable variable");
mpc_set_ui (FACT_cast_to_num (args[2])->value,
(FACT_compare_num (args[1].ap, args[0].ap) >= 0
? 1
: 0));
}
END_SEG ();
SEG (CMT);
{
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], NUM_TYPE);
args[1].ap = Furlow_reg_val (progm[CURR_IP][2], NUM_TYPE);
args[2].ap = Furlow_reg_val (progm[CURR_IP][3], NUM_TYPE);
if (FACT_cast_to_num (args[2])->locked)
FACT_throw_error (CURR_THIS, "cannot set immutable variable");
mpc_set_ui (FACT_cast_to_num (args[2])->value,
(FACT_compare_num (args[1].ap, args[0].ap) > 0
? 1
: 0));
}
END_SEG ();
SEG (CNE);
{
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], NUM_TYPE);
args[1].ap = Furlow_reg_val (progm[CURR_IP][2], NUM_TYPE);
args[2].ap = Furlow_reg_val (progm[CURR_IP][3], NUM_TYPE);
if (FACT_cast_to_num (args[2])->locked)
FACT_throw_error (CURR_THIS, "cannot set immutable variable");
mpc_set_ui (FACT_cast_to_num (args[2])->value,
(FACT_compare_num (args[1].ap, args[0].ap) != 0
? 1
: 0));
}
END_SEG ();
SEG (CONSTS);
{
push_constant_str (progm[CURR_IP] + 1);
}
END_SEG ();
SEG (CONSTI);
{
push_constant_si (get_seg_addr (progm[CURR_IP] + 1));
}
END_SEG ();
SEG (CONSTU);
{
push_constant_ui (get_seg_addr (progm[CURR_IP] + 1));
}
END_SEG ();
SEG (DEC);
{
/* Decrement a register. */
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], NUM_TYPE);
if (FACT_cast_to_num (args[0])->locked)
FACT_throw_error (CURR_THIS, "cannot set immutable variable");
mpc_sub_ui (FACT_cast_to_num (args[0])->value,
FACT_cast_to_num (args[0])->value, 1);
}
END_SEG ();
SEG (DEF_N);
{
/* Declare a number variable. */
FACT_def_num (progm[CURR_IP] + 1, false);
}
END_SEG ();
SEG (DEF_S);
{
/* Declare a scope variable. */
FACT_def_scope (progm[CURR_IP] + 1, false);
}
END_SEG ();
SEG (DIE);
{
curr_thread->run_flag = T_DEAD; /* The thread is dead. */
return; /* Exit. */
}
END_SEG ();
SEG (DIV);
{
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], NUM_TYPE);
args[1].ap = Furlow_reg_val (progm[CURR_IP][2], NUM_TYPE);
args[2].ap = Furlow_reg_val (progm[CURR_IP][3], NUM_TYPE);
if (FACT_cast_to_num (args[2])->locked)
FACT_throw_error (CURR_THIS, "cannot set immutable variable");
if (!mpc_cmp_ui (((FACT_num_t) args[0].ap)->value, 0))
FACT_throw_error (CURR_THIS, "division by zero error");
mpc_div (((FACT_num_t) args[2].ap)->value,
((FACT_num_t) args[1].ap)->value,
((FACT_num_t) args[0].ap)->value);
}
END_SEG ();
SEG (DROP);
{
/* Remove the first item on the variable stack. */
if (curr_thread->vstackp >= curr_thread->vstack)
pop_v (); /* Just pop and ignore. */
}
END_SEG ();
SEG (DUP);
{
/* Duplicate the first item on the stack. */
args[0] = *Furlow_register (R_TOP);
if (args[0].type == SCOPE_TYPE)
/* To duplicate a scope we simply push it back onto the stack. */
push_v (args[0]);
else {
/* Copy the number and push it on to the stack. */
args[1].ap = FACT_alloc_num ();
FACT_set_num (args[1].ap, args[0].ap);
args[1].type = NUM_TYPE;
push_v (args[1]);
}
}
END_SEG ();
SEG (ELEM);
{
/* Get an element of an array. */
args[0] = *Furlow_register (progm[CURR_IP][1]);
if (args[0].type == NUM_TYPE)
FACT_get_num_elem (args[0].ap, progm[CURR_IP] + 2);
else
FACT_get_scope_elem (args[0].ap, progm[CURR_IP] + 2);
}
END_SEG ();
SEG (EXIT);
{
/* Close any open trap regions. */
while (curr_thread->num_traps != 0
&& (curr_thread->traps[curr_thread->num_traps][1]
== (curr_thread->cstackp - curr_thread->cstack + 1)))
pop_t ();
/* Exit the current scope. */
cs_arg = pop_c ();
CURR_IP = cs_arg.ip;
args[0].ap = cs_arg.this;
args[0].type = SCOPE_TYPE;
push_v (args[0]);
}
END_SEG ();
SEG (GLOBAL);
{
args[0] = *Furlow_register (progm[CURR_IP][1]);
if (progm[CURR_IP][2] != '\0') {
if (args[0].type == NUM_TYPE)
FACT_cast_to_num (args[0])->name = progm[CURR_IP] + 2;
else
FACT_cast_to_scope (args[0])->name = progm[CURR_IP] + 2;
}
FACT_add_to_table (&Furlow_globals, args[0]);
}
END_SEG ();
SEG (GOTO);
{
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], SCOPE_TYPE);
CURR_IP = *(FACT_cast_to_scope (args[0])->code) - 1;
}
END_SEG ();
SEG (HALT);
{
curr_thread->run_flag = T_HALTED; /* The thread is dead, for now. */
return; /* Exit. */
}
END_SEG ();
SEG (INC);
{
/* Increment a register. */
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], NUM_TYPE);
if (FACT_cast_to_num (args[0])->locked)
FACT_throw_error (CURR_THIS, "cannot set immutable variable");
mpc_add_ui (FACT_cast_to_num (args[0])->value,
FACT_cast_to_num (args[0])->value, 1);
}
END_SEG ();
SEG (IOR);
{
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], NUM_TYPE);
args[1].ap = Furlow_reg_val (progm[CURR_IP][2], NUM_TYPE);
args[2].ap = Furlow_reg_val (progm[CURR_IP][3], NUM_TYPE);
if (FACT_cast_to_num (args[2])->locked)
FACT_throw_error (CURR_THIS, "cannot set immutable variable");
if (mpc_is_float (((FACT_num_t) args[0].ap)->value) ||
mpc_is_float (((FACT_num_t) args[1].ap)->value))
/*
if (((FACT_num_t) args[0].ap)->value->precision
|| ((FACT_num_t) args[1].ap)->value->precision) */
FACT_throw_error (CURR_THIS, "arguments to bitwise operators cannot be floating point");
mpc_ior (((FACT_num_t) args[2].ap)->value,
((FACT_num_t) args[1].ap)->value,
((FACT_num_t) args[0].ap)->value);
}
END_SEG ();
SEG (IS_AUTO);
{
push_constant_ui (FACT_get_local (CURR_THIS, progm[CURR_IP] + 1) == NULL
? 0
: 1);
}
END_SEG ();
SEG (IS_DEF);
{
push_constant_ui (FACT_get_global (CURR_THIS, progm[CURR_IP] + 1) == NULL
? 0
: 1);
}
END_SEG ();
SEG (JMP);
{
/* Unconditional jump. */
CURR_IP = get_seg_addr (progm[CURR_IP] + 1) - 1;
}
END_SEG ();
SEG (JMP_PNT);
{
/* Push a scope to the stack with code = to the address. */
args[0].ap = FACT_alloc_scope ();
*FACT_cast_to_scope (args[0])->code = get_seg_addr (progm[CURR_IP] + 1);
args[0].type = SCOPE_TYPE;
push_v (args[0]);
}
END_SEG ();
SEG (JIF);
{
/* Jump on false. */
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], NUM_TYPE);
if (!mpc_cmp_ui (((FACT_num_t) args[0].ap)->value, 0))
CURR_IP = get_seg_addr (progm[CURR_IP] + 2) - 1;
}
END_SEG ();
SEG (JIN);
{
/* Jump on type `number'. */
args[0] = *Furlow_register (progm[CURR_IP][1]);
if (args[0].type == NUM_TYPE)
CURR_IP = get_seg_addr (progm[CURR_IP] + 2) - 1;
}
END_SEG ();
SEG (JIS);
{
/* Jump on type `scope'. */
args[0] = *Furlow_register (progm[CURR_IP][1]);
if (args[0].type == SCOPE_TYPE)
CURR_IP = get_seg_addr (progm[CURR_IP] + 2) - 1;
}
END_SEG ();
SEG (JIT);
{
/* Jump on true. */
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], NUM_TYPE);
if (mpc_cmp_ui (((FACT_num_t) args[0].ap)->value, 0))
CURR_IP = get_seg_addr (progm[CURR_IP] + 2) - 1;
}
END_SEG ();
SEG (LAMBDA);
{
/* Push a lambda scope to the stack. */
args[0].ap = FACT_alloc_scope ();
args[0].type = SCOPE_TYPE;
push_v (args[0]);
}
END_SEG ();
SEG (LOCK);
{
args[0] = *Furlow_register (progm[CURR_IP][1]);
if (args[0].type == NUM_TYPE)
FACT_lock_num (args[0].ap);
else
FACT_cast_to_scope (args[0])->lock_stat = HARD_LOCK;
}
END_SEG ();
SEG (MOD);
{
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], NUM_TYPE);
args[1].ap = Furlow_reg_val (progm[CURR_IP][2], NUM_TYPE);
args[2].ap = Furlow_reg_val (progm[CURR_IP][3], NUM_TYPE);
if (FACT_cast_to_num (args[2])->locked)
FACT_throw_error (CURR_THIS, "cannot set immutable variable");
if (!mpc_cmp_ui (((FACT_num_t) args[0].ap)->value, 0))
FACT_throw_error (CURR_THIS, "mod by zero error");
if (((FACT_num_t) args[0].ap)->value->fp ||
((FACT_num_t) args[1].ap)->value->fp)
FACT_throw_error(CURR_THIS, "cannot mod floating point values");
mpc_mod (((FACT_num_t) args[2].ap)->value,
((FACT_num_t) args[1].ap)->value,
((FACT_num_t) args[0].ap)->value);
}
END_SEG ();
SEG (MUL);
{
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], NUM_TYPE);
args[1].ap = Furlow_reg_val (progm[CURR_IP][2], NUM_TYPE);
args[2].ap = Furlow_reg_val (progm[CURR_IP][3], NUM_TYPE);
if (FACT_cast_to_num (args[2])->locked)
FACT_throw_error (CURR_THIS, "cannot set immutable variable");
mpc_mul (((FACT_num_t) args[2].ap)->value,
((FACT_num_t) args[1].ap)->value,
((FACT_num_t) args[0].ap)->value);
}
END_SEG ();
SEG (NAME);
{
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], SCOPE_TYPE);
args[1].ap = Furlow_reg_val (progm[CURR_IP][2], SCOPE_TYPE);
FACT_cast_to_scope (args[1])->name = FACT_cast_to_scope (args[0])->name;
}
END_SEG ();
SEG (NEG);
{
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], NUM_TYPE);
if (FACT_cast_to_num (args[0])->locked)
FACT_throw_error (CURR_THIS, "cannot set immutable variable");
mpc_neg (FACT_cast_to_num (args[0])->value,
FACT_cast_to_num (args[0])->value);
}
END_SEG ();
SEG (NEW_N);
{
/* Create a new anonymous number. */
FACT_def_num (progm[CURR_IP] + 1, true);
}
END_SEG ();
SEG (NEW_S);
{
/* Create a new anonymous scope. */
FACT_def_scope (progm[CURR_IP] + 1, true);
}
END_SEG ();
SEG (NOP);
{
/* Do nothing. */
}
END_SEG ();
SEG (PURGE);
{
/* Remove all items from the variable stack. */
if (curr_thread->vstackp >= curr_thread->vstack) {
/* Only purge if there actually are items in the var stack. */
FACT_free (curr_thread->vstack);
curr_thread->vstackp = curr_thread->vstack = NULL;
}
}
END_SEG ();
SEG (REF);
{
/* Set a register to the reference of another. */
reg_args[0] = Furlow_register (progm[CURR_IP][1]);
reg_args[1] = Furlow_register (progm[CURR_IP][2]);
reg_args[1]->type = reg_args[0]->type;
reg_args[1]->ap = reg_args[0]->ap;
reg_args[1]->home = reg_args[0]->home;
}
END_SEG ();
SEG (RET);
{
/* Close any open trap regions. */
while (curr_thread->num_traps != 0
&& (curr_thread->traps[curr_thread->num_traps][1]
== (curr_thread->cstackp - curr_thread->cstack + 1)))
pop_t ();
/* Pop the call stack. */
pop_c ();
}
END_SEG ();
SEG (SET_C);
{
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], SCOPE_TYPE);
*FACT_cast_to_scope (args[0])->code = get_seg_addr (progm[CURR_IP] + 2);
}
END_SEG ();
SEG (SET_F);
{
args[0].ap = Furlow_reg_val (progm[CURR_IP][1], SCOPE_TYPE);
args[1].ap = Furlow_reg_val (progm[CURR_IP][2], SCOPE_TYPE);
FACT_cast_to_scope (args[1])->code = FACT_cast_to_scope (args[0])->code;
FACT_cast_to_scope (args[1])->extrn_func = FACT_cast_to_scope (args[0])->extrn_func;
}
END_SEG ();
SEG (SPRT);
{
FACT_thread_t curr;
/* Gain control of threads. */
Furlow_lock_threads ();
/* Find the next open spot in the linked list. */
for (curr = threads; curr->next != NULL; curr = curr->next);
/* Allocate and initialize the new thread. */
curr->next = FACT_malloc (sizeof (struct FACT_thread));
curr = curr->next;
curr->thread_num = num_threads++;
curr->curr_err.what = DEF_ERR_MSG;
curr->cstack_size = 1;
curr->cstackp = curr->cstack = FACT_malloc (sizeof (struct cstack_t));
curr->root_message = NULL;
curr->num_messages = 0;
pthread_mutex_init (&curr->queue_lock, NULL);
pthread_cond_init (&curr->msg_block, NULL);
/* Set the top scope and the IP of the thread. */
THIS_OF (curr) = FACT_alloc_scope ();
THIS_OF (curr)->name = "main<thread>";
IP_OF (curr) = CURR_IP + 1;
/* Initialize the registers. */
for (i = 0; i < T_REGISTERS; i++)
curr->registers[i].type = UNSET_TYPE;
/* Push the TID of the new thread to the var stack. */
push_constant_ui (curr->thread_num);
/* Run the thread and give up control of threads. */
pthread_create (&curr->thread_id, NULL, Furlow_thread_mask, curr);
Furlow_unlock_threads ();
/* Jump. */
CURR_IP = get_seg_addr (progm[CURR_IP] + 1) - 1;
}
END_SEG ();
SEG (STO);
{
/* STO,$A,$B : $B <- $A */
args[0] = *Furlow_register (progm[CURR_IP][1]);
args[1] = *Furlow_register (progm[CURR_IP][2]);