mirror of https://github.com/janet-lang/janet
948 lines
32 KiB
C
948 lines
32 KiB
C
/*
|
|
* Copyright (c) 2018 Calvin Rose
|
|
*
|
|
* 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 THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS 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 <setjmp.h>
|
|
#include <janet/janet.h>
|
|
#include "util.h"
|
|
|
|
/* Conditionally compile this file */
|
|
#ifdef JANET_ASSEMBLER
|
|
|
|
/* Definition for an instruction in the assembler */
|
|
typedef struct JanetInstructionDef JanetInstructionDef;
|
|
struct JanetInstructionDef {
|
|
const char *name;
|
|
enum JanetOpCode opcode;
|
|
};
|
|
|
|
/* Hold all state needed during assembly */
|
|
typedef struct JanetAssembler JanetAssembler;
|
|
struct JanetAssembler {
|
|
JanetAssembler *parent;
|
|
JanetFuncDef *def;
|
|
jmp_buf on_error;
|
|
const uint8_t *errmessage;
|
|
int32_t errindex;
|
|
|
|
int32_t environments_capacity;
|
|
int32_t defs_capacity;
|
|
int32_t bytecode_count; /* Used for calculating labels */
|
|
|
|
Janet name;
|
|
JanetTable labels; /* symbol -> bytecode index */
|
|
JanetTable constants; /* symbol -> constant index */
|
|
JanetTable slots; /* symbol -> slot index */
|
|
JanetTable envs; /* symbol -> environment index */
|
|
JanetTable defs; /* symbol -> funcdefs index */
|
|
};
|
|
|
|
/* Janet opcode descriptions in lexographic order. This
|
|
* allows a binary search over the elements to find the
|
|
* correct opcode given a name. This works in reasonable
|
|
* time and is easier to setup statically than a hash table or
|
|
* prefix tree. */
|
|
static const JanetInstructionDef janet_ops[] = {
|
|
{"add", JOP_ADD},
|
|
{"addim", JOP_ADD_IMMEDIATE},
|
|
{"band", JOP_BAND},
|
|
{"bnot", JOP_BNOT},
|
|
{"bor", JOP_BOR},
|
|
{"bxor", JOP_BXOR},
|
|
{"call", JOP_CALL},
|
|
{"clo", JOP_CLOSURE},
|
|
{"cmp", JOP_COMPARE},
|
|
{"div", JOP_DIVIDE},
|
|
{"divim", JOP_DIVIDE_IMMEDIATE},
|
|
{"eq", JOP_EQUALS},
|
|
{"eqim", JOP_EQUALS_IMMEDIATE},
|
|
{"eqn", JOP_NUMERIC_EQUAL},
|
|
{"err", JOP_ERROR},
|
|
{"get", JOP_GET},
|
|
{"geti", JOP_GET_INDEX},
|
|
{"gt", JOP_GREATER_THAN},
|
|
{"gtim", JOP_GREATER_THAN_IMMEDIATE},
|
|
{"gtn", JOP_NUMERIC_GREATER_THAN},
|
|
{"gten", JOP_NUMERIC_GREATER_THAN_EQUAL},
|
|
{"jmp", JOP_JUMP},
|
|
{"jmpif", JOP_JUMP_IF},
|
|
{"jmpno", JOP_JUMP_IF_NOT},
|
|
{"ldc", JOP_LOAD_CONSTANT},
|
|
{"ldf", JOP_LOAD_FALSE},
|
|
{"ldi", JOP_LOAD_INTEGER},
|
|
{"ldn", JOP_LOAD_NIL},
|
|
{"lds", JOP_LOAD_SELF},
|
|
{"ldt", JOP_LOAD_TRUE},
|
|
{"ldu", JOP_LOAD_UPVALUE},
|
|
{"len", JOP_LENGTH},
|
|
{"lt", JOP_LESS_THAN},
|
|
{"lten", JOP_NUMERIC_LESS_THAN_EQUAL},
|
|
{"ltim", JOP_LESS_THAN_IMMEDIATE},
|
|
{"ltn", JOP_NUMERIC_LESS_THAN},
|
|
{"mkarr", JOP_MAKE_ARRAY},
|
|
{"mkbuf", JOP_MAKE_BUFFER},
|
|
{"mkstr", JOP_MAKE_STRING},
|
|
{"mkstu", JOP_MAKE_STRUCT},
|
|
{"mktab", JOP_MAKE_TABLE},
|
|
{"mktup", JOP_MAKE_TUPLE},
|
|
{"movf", JOP_MOVE_FAR},
|
|
{"movn", JOP_MOVE_NEAR},
|
|
{"mul", JOP_MULTIPLY},
|
|
{"mulim", JOP_MULTIPLY_IMMEDIATE},
|
|
{"noop", JOP_NOOP},
|
|
{"push", JOP_PUSH},
|
|
{"push2", JOP_PUSH_2},
|
|
{"push3", JOP_PUSH_3},
|
|
{"pusha", JOP_PUSH_ARRAY},
|
|
{"put", JOP_PUT},
|
|
{"puti", JOP_PUT_INDEX},
|
|
{"res", JOP_RESUME},
|
|
{"ret", JOP_RETURN},
|
|
{"retn", JOP_RETURN_NIL},
|
|
{"setu", JOP_SET_UPVALUE},
|
|
{"sig", JOP_SIGNAL},
|
|
{"sl", JOP_SHIFT_LEFT},
|
|
{"slim", JOP_SHIFT_LEFT_IMMEDIATE},
|
|
{"sr", JOP_SHIFT_RIGHT},
|
|
{"srim", JOP_SHIFT_RIGHT_IMMEDIATE},
|
|
{"sru", JOP_SHIFT_RIGHT_UNSIGNED},
|
|
{"sruim", JOP_SHIFT_RIGHT_UNSIGNED_IMMEDIATE},
|
|
{"sub", JOP_SUBTRACT},
|
|
{"tcall", JOP_TAILCALL},
|
|
{"tchck", JOP_TYPECHECK}
|
|
};
|
|
|
|
/* Typename aliases for tchck instruction */
|
|
typedef struct TypeAlias {
|
|
const char *name;
|
|
int32_t mask;
|
|
} TypeAlias;
|
|
|
|
static const TypeAlias type_aliases[] = {
|
|
{":abstract", JANET_TFLAG_ABSTRACT},
|
|
{":array", JANET_TFLAG_ARRAY},
|
|
{":boolean", JANET_TFLAG_BOOLEAN},
|
|
{":buffer", JANET_TFLAG_BUFFER},
|
|
{":callable", JANET_TFLAG_CALLABLE},
|
|
{":cfunction", JANET_TFLAG_CFUNCTION},
|
|
{":dictionary", JANET_TFLAG_DICTIONARY},
|
|
{":false", JANET_TFLAG_FALSE},
|
|
{":fiber", JANET_TFLAG_FIBER},
|
|
{":function", JANET_TFLAG_FUNCTION},
|
|
{":indexed", JANET_TFLAG_INDEXED},
|
|
{":nil", JANET_TFLAG_NIL},
|
|
{":number", JANET_TFLAG_NUMBER},
|
|
{":string", JANET_TFLAG_STRING},
|
|
{":struct", JANET_TFLAG_STRUCT},
|
|
{":symbol", JANET_TFLAG_SYMBOL},
|
|
{":table", JANET_TFLAG_BOOLEAN},
|
|
{":true", JANET_TFLAG_TRUE},
|
|
{":tuple", JANET_TFLAG_BOOLEAN}
|
|
};
|
|
|
|
/* Deinitialize an Assembler. Does not deinitialize the parents. */
|
|
static void janet_asm_deinit(JanetAssembler *a) {
|
|
janet_table_deinit(&a->slots);
|
|
janet_table_deinit(&a->labels);
|
|
janet_table_deinit(&a->envs);
|
|
janet_table_deinit(&a->constants);
|
|
janet_table_deinit(&a->defs);
|
|
}
|
|
|
|
/* Throw some kind of assembly error */
|
|
static void janet_asm_error(JanetAssembler *a, const char *message) {
|
|
a->errmessage = janet_formatc("%s, instruction %d", message, a->errindex);
|
|
longjmp(a->on_error, 1);
|
|
}
|
|
#define janet_asm_assert(a, c, m) do { if (!(c)) janet_asm_error((a), (m)); } while (0)
|
|
|
|
/* Throw some kind of assembly error */
|
|
static void janet_asm_errorv(JanetAssembler *a, const uint8_t *m) {
|
|
a->errmessage = m;
|
|
longjmp(a->on_error, 1);
|
|
}
|
|
|
|
/* Add a closure environment to the assembler. Sub funcdefs may need
|
|
* to reference outer function environments, and may change the outer environment.
|
|
* Returns the index of the environment in the assembler's environments, or -1
|
|
* if not found. */
|
|
static int32_t janet_asm_addenv(JanetAssembler *a, Janet envname) {
|
|
Janet check;
|
|
JanetFuncDef *def = a->def;
|
|
int32_t envindex;
|
|
int32_t res;
|
|
if (janet_equals(a->name, envname)) {
|
|
return -1;
|
|
}
|
|
/* Check for memoized value */
|
|
check = janet_table_get(&a->envs, envname);
|
|
if (janet_checktype(check, JANET_NUMBER)) {
|
|
return (int32_t) janet_unwrap_number(check);
|
|
}
|
|
if (NULL == a->parent) return -2;
|
|
res = janet_asm_addenv(a->parent, envname);
|
|
if (res < -1) {
|
|
return res;
|
|
}
|
|
envindex = def->environments_length;
|
|
janet_table_put(&a->envs, envname, janet_wrap_number(envindex));
|
|
if (envindex >= a->environments_capacity) {
|
|
int32_t newcap = 2 * envindex;
|
|
def->environments = realloc(def->environments, newcap * sizeof(int32_t));
|
|
if (NULL == def->environments) {
|
|
JANET_OUT_OF_MEMORY;
|
|
}
|
|
a->environments_capacity = newcap;
|
|
}
|
|
def->environments[envindex] = (int32_t) res;
|
|
def->environments_length = envindex + 1;
|
|
return envindex;
|
|
}
|
|
|
|
/* Parse an argument to an assembly instruction, and return the result as an
|
|
* integer. This integer will need to be bounds checked. */
|
|
static int32_t doarg_1(
|
|
JanetAssembler *a,
|
|
enum JanetOpArgType argtype,
|
|
Janet x) {
|
|
int32_t ret = -1;
|
|
JanetTable *c;
|
|
switch (argtype) {
|
|
default:
|
|
c = NULL;
|
|
break;
|
|
case JANET_OAT_SLOT:
|
|
c = &a->slots;
|
|
break;
|
|
case JANET_OAT_ENVIRONMENT:
|
|
c = &a->envs;
|
|
break;
|
|
case JANET_OAT_CONSTANT:
|
|
c = &a->constants;
|
|
break;
|
|
case JANET_OAT_LABEL:
|
|
c = &a->labels;
|
|
break;
|
|
case JANET_OAT_FUNCDEF:
|
|
c = &a->defs;
|
|
break;
|
|
}
|
|
switch (janet_type(x)) {
|
|
default:
|
|
goto error;
|
|
break;
|
|
case JANET_NUMBER:
|
|
{
|
|
double y = janet_unwrap_number(x);
|
|
if (y >= INT32_MIN && y <= INT32_MAX) {
|
|
ret = y;
|
|
} else {
|
|
goto error;
|
|
}
|
|
break;
|
|
}
|
|
case JANET_TUPLE:
|
|
{
|
|
const Janet *t = janet_unwrap_tuple(x);
|
|
if (argtype == JANET_OAT_TYPE) {
|
|
int32_t i = 0;
|
|
ret = 0;
|
|
for (i = 0; i < janet_tuple_length(t); i++) {
|
|
ret |= doarg_1(a, JANET_OAT_SIMPLETYPE, t[i]);
|
|
}
|
|
} else {
|
|
goto error;
|
|
}
|
|
break;
|
|
}
|
|
case JANET_SYMBOL:
|
|
{
|
|
if (NULL != c) {
|
|
Janet result = janet_table_get(c, x);
|
|
if (janet_checktype(result, JANET_NUMBER)) {
|
|
if (argtype == JANET_OAT_LABEL) {
|
|
ret = janet_unwrap_integer(result) - a->bytecode_count;
|
|
} else {
|
|
ret = (int32_t) janet_unwrap_number(result);
|
|
}
|
|
} else {
|
|
janet_asm_errorv(a, janet_formatc("unknown name %v", x));
|
|
}
|
|
} else if (argtype == JANET_OAT_TYPE || argtype == JANET_OAT_SIMPLETYPE) {
|
|
const TypeAlias *alias = janet_strbinsearch(
|
|
&type_aliases,
|
|
sizeof(type_aliases)/sizeof(TypeAlias),
|
|
sizeof(TypeAlias),
|
|
janet_unwrap_symbol(x));
|
|
if (alias) {
|
|
ret = alias->mask;
|
|
} else {
|
|
janet_asm_errorv(a, janet_formatc("unknown type %v", x));
|
|
}
|
|
} else {
|
|
goto error;
|
|
}
|
|
if (argtype == JANET_OAT_ENVIRONMENT && ret == -1) {
|
|
/* Add a new env */
|
|
ret = janet_asm_addenv(a, x);
|
|
if (ret < -1) {
|
|
janet_asm_errorv(a, janet_formatc("unknown environment %v", x));
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (argtype == JANET_OAT_SLOT && ret >= a->def->slotcount)
|
|
a->def->slotcount = (int32_t) ret + 1;
|
|
return ret;
|
|
|
|
error:
|
|
janet_asm_errorv(a, janet_formatc("error parsing instruction argument %v", x));
|
|
return 0;
|
|
}
|
|
|
|
/* Parse a single argument to an instruction. Trims it as well as
|
|
* try to convert arguments to bit patterns */
|
|
static uint32_t doarg(
|
|
JanetAssembler *a,
|
|
enum JanetOpArgType argtype,
|
|
int nth,
|
|
int nbytes,
|
|
int hassign,
|
|
Janet x) {
|
|
int32_t arg = doarg_1(a, argtype, x);
|
|
/* Calculate the min and max values that can be stored given
|
|
* nbytes, and whether or not the storage is signed */
|
|
int32_t max = (1 << ((nbytes << 3) - hassign)) - 1;
|
|
int32_t min = hassign ? -max - 1 : 0;
|
|
if (arg < min)
|
|
janet_asm_errorv(a, janet_formatc("instruction argument %v is too small, must be %d byte%s",
|
|
x, nbytes, nbytes > 1 ? "s" : ""));
|
|
if (arg > max)
|
|
janet_asm_errorv(a, janet_formatc("instruction argument %v is too large, must be %d byte%s",
|
|
x, nbytes, nbytes > 1 ? "s" : ""));
|
|
return ((uint32_t) arg) << (nth << 3);
|
|
}
|
|
|
|
/* Provide parsing methods for the different kinds of arguments */
|
|
static uint32_t read_instruction(
|
|
JanetAssembler *a,
|
|
const JanetInstructionDef *idef,
|
|
const Janet *argt) {
|
|
uint32_t instr = idef->opcode;
|
|
enum JanetInstructionType type = janet_instructions[idef->opcode];
|
|
switch (type) {
|
|
case JINT_0:
|
|
{
|
|
if (janet_tuple_length(argt) != 1)
|
|
janet_asm_error(a, "expected 0 arguments: (op)");
|
|
break;
|
|
}
|
|
case JINT_S:
|
|
{
|
|
if (janet_tuple_length(argt) != 2)
|
|
janet_asm_error(a, "expected 1 argument: (op, slot)");
|
|
instr |= doarg(a, JANET_OAT_SLOT, 1, 2, 0, argt[1]);
|
|
break;
|
|
}
|
|
case JINT_L:
|
|
{
|
|
if (janet_tuple_length(argt) != 2)
|
|
janet_asm_error(a, "expected 1 argument: (op, label)");
|
|
instr |= doarg(a, JANET_OAT_LABEL, 1, 3, 1, argt[1]);
|
|
break;
|
|
}
|
|
case JINT_SS:
|
|
{
|
|
if (janet_tuple_length(argt) != 3)
|
|
janet_asm_error(a, "expected 2 arguments: (op, slot, slot)");
|
|
instr |= doarg(a, JANET_OAT_SLOT, 1, 1, 0, argt[1]);
|
|
instr |= doarg(a, JANET_OAT_SLOT, 2, 2, 0, argt[2]);
|
|
break;
|
|
}
|
|
case JINT_SL:
|
|
{
|
|
if (janet_tuple_length(argt) != 3)
|
|
janet_asm_error(a, "expected 2 arguments: (op, slot, label)");
|
|
instr |= doarg(a, JANET_OAT_SLOT, 1, 1, 0, argt[1]);
|
|
instr |= doarg(a, JANET_OAT_LABEL, 2, 2, 1, argt[2]);
|
|
break;
|
|
}
|
|
case JINT_ST:
|
|
{
|
|
if (janet_tuple_length(argt) != 3)
|
|
janet_asm_error(a, "expected 2 arguments: (op, slot, type)");
|
|
instr |= doarg(a, JANET_OAT_SLOT, 1, 1, 0, argt[1]);
|
|
instr |= doarg(a, JANET_OAT_TYPE, 2, 2, 0, argt[2]);
|
|
break;
|
|
}
|
|
case JINT_SI:
|
|
case JINT_SU:
|
|
{
|
|
if (janet_tuple_length(argt) != 3)
|
|
janet_asm_error(a, "expected 2 arguments: (op, slot, integer)");
|
|
instr |= doarg(a, JANET_OAT_SLOT, 1, 1, 0, argt[1]);
|
|
instr |= doarg(a, JANET_OAT_INTEGER, 2, 2, type == JINT_SI, argt[2]);
|
|
break;
|
|
}
|
|
case JINT_SD:
|
|
{
|
|
if (janet_tuple_length(argt) != 3)
|
|
janet_asm_error(a, "expected 2 arguments: (op, slot, funcdef)");
|
|
instr |= doarg(a, JANET_OAT_SLOT, 1, 1, 0, argt[1]);
|
|
instr |= doarg(a, JANET_OAT_FUNCDEF, 2, 2, 0, argt[2]);
|
|
break;
|
|
}
|
|
case JINT_SSS:
|
|
{
|
|
if (janet_tuple_length(argt) != 4)
|
|
janet_asm_error(a, "expected 3 arguments: (op, slot, slot, slot)");
|
|
instr |= doarg(a, JANET_OAT_SLOT, 1, 1, 0, argt[1]);
|
|
instr |= doarg(a, JANET_OAT_SLOT, 2, 1, 0, argt[2]);
|
|
instr |= doarg(a, JANET_OAT_SLOT, 3, 1, 0, argt[3]);
|
|
break;
|
|
}
|
|
case JINT_SSI:
|
|
case JINT_SSU:
|
|
{
|
|
if (janet_tuple_length(argt) != 4)
|
|
janet_asm_error(a, "expected 3 arguments: (op, slot, slot, integer)");
|
|
instr |= doarg(a, JANET_OAT_SLOT, 1, 1, 0, argt[1]);
|
|
instr |= doarg(a, JANET_OAT_SLOT, 2, 1, 0, argt[2]);
|
|
instr |= doarg(a, JANET_OAT_INTEGER, 3, 1, type == JINT_SSI, argt[3]);
|
|
break;
|
|
}
|
|
case JINT_SES:
|
|
{
|
|
JanetAssembler *b = a;
|
|
uint32_t env;
|
|
if (janet_tuple_length(argt) != 4)
|
|
janet_asm_error(a, "expected 3 arguments: (op, slot, environment, envslot)");
|
|
instr |= doarg(a, JANET_OAT_SLOT, 1, 1, 0, argt[1]);
|
|
env = doarg(a, JANET_OAT_ENVIRONMENT, 0, 1, 0, argt[2]);
|
|
instr |= env << 16;
|
|
for (env += 1; env > 0; env--) {
|
|
b = b->parent;
|
|
if (NULL == b)
|
|
janet_asm_error(a, "invalid environment index");
|
|
}
|
|
instr |= doarg(b, JANET_OAT_SLOT, 3, 1, 0, argt[3]);
|
|
break;
|
|
}
|
|
case JINT_SC:
|
|
{
|
|
if (janet_tuple_length(argt) != 3)
|
|
janet_asm_error(a, "expected 2 arguments: (op, slot, constant)");
|
|
instr |= doarg(a, JANET_OAT_SLOT, 1, 1, 0, argt[1]);
|
|
instr |= doarg(a, JANET_OAT_CONSTANT, 2, 2, 0, argt[2]);
|
|
break;
|
|
}
|
|
}
|
|
return instr;
|
|
}
|
|
|
|
/* Helper to get from a structure */
|
|
static Janet janet_get1(Janet ds, Janet key) {
|
|
switch (janet_type(ds)) {
|
|
default:
|
|
return janet_wrap_nil();
|
|
case JANET_TABLE:
|
|
return janet_table_get(janet_unwrap_table(ds), key);
|
|
case JANET_STRUCT:
|
|
return janet_struct_get(janet_unwrap_struct(ds), key);
|
|
}
|
|
}
|
|
|
|
/* Helper to assembly. Return the assembly result */
|
|
static JanetAssembleResult janet_asm1(JanetAssembler *parent, Janet source, int flags) {
|
|
JanetAssembleResult result;
|
|
JanetAssembler a;
|
|
Janet s = source;
|
|
JanetFuncDef *def;
|
|
int32_t count, i;
|
|
const Janet *arr;
|
|
Janet x;
|
|
(void) flags;
|
|
|
|
/* Initialize funcdef */
|
|
def = janet_funcdef_alloc();
|
|
|
|
/* Initialize Assembler */
|
|
a.def = def;
|
|
a.parent = parent;
|
|
a.errmessage = NULL;
|
|
a.errindex = 0;
|
|
a.environments_capacity = 0;
|
|
a.bytecode_count = 0;
|
|
a.defs_capacity = 0;
|
|
a.name = janet_wrap_nil();
|
|
janet_table_init(&a.labels, 0);
|
|
janet_table_init(&a.constants, 0);
|
|
janet_table_init(&a.slots, 0);
|
|
janet_table_init(&a.envs, 0);
|
|
janet_table_init(&a.defs, 0);
|
|
|
|
/* Set error jump */
|
|
if (setjmp(a.on_error)) {
|
|
if (NULL != a.parent) {
|
|
janet_asm_deinit(&a);
|
|
longjmp(a.parent->on_error, 1);
|
|
}
|
|
result.funcdef = NULL;
|
|
result.error = a.errmessage;
|
|
result.status = JANET_ASSEMBLE_ERROR;
|
|
janet_asm_deinit(&a);
|
|
return result;
|
|
}
|
|
|
|
janet_asm_assert(&a,
|
|
janet_checktype(s, JANET_STRUCT) ||
|
|
janet_checktype(s, JANET_TABLE),
|
|
"expected struct or table for assembly source");
|
|
|
|
/* Check for function name */
|
|
a.name = janet_get1(s, janet_csymbolv("name"));
|
|
if (!janet_checktype(a.name, JANET_NIL)) {
|
|
def->name = janet_to_string(a.name);
|
|
}
|
|
|
|
/* Set function arity */
|
|
x = janet_get1(s, janet_csymbolv("arity"));
|
|
def->arity = janet_checkint(x) ? janet_unwrap_integer(x) : 0;
|
|
|
|
/* Check vararg */
|
|
x = janet_get1(s, janet_csymbolv("vararg"));
|
|
if (janet_truthy(x)) def->flags |= JANET_FUNCDEF_FLAG_VARARG;
|
|
|
|
/* Check strict arity */
|
|
x = janet_get1(s, janet_csymbolv("fix-arity"));
|
|
if (janet_truthy(x)) def->flags |= JANET_FUNCDEF_FLAG_FIXARITY;
|
|
|
|
/* Check source */
|
|
x = janet_get1(s, janet_csymbolv("source"));
|
|
if (janet_checktype(x, JANET_STRING)) def->source = janet_unwrap_string(x);
|
|
|
|
/* Create slot aliases */
|
|
x = janet_get1(s, janet_csymbolv("slots"));
|
|
if (janet_indexed_view(x, &arr, &count)) {
|
|
for (i = 0; i < count; i++) {
|
|
Janet v = arr[i];
|
|
if (janet_checktype(v, JANET_TUPLE)) {
|
|
const Janet *t = janet_unwrap_tuple(v);
|
|
int32_t j;
|
|
for (j = 0; j < janet_tuple_length(t); j++) {
|
|
if (!janet_checktype(t[j], JANET_SYMBOL))
|
|
janet_asm_error(&a, "slot names must be symbols");
|
|
janet_table_put(&a.slots, t[j], janet_wrap_integer(i));
|
|
}
|
|
} else if (janet_checktype(v, JANET_SYMBOL)) {
|
|
janet_table_put(&a.slots, v, janet_wrap_integer(i));
|
|
} else {
|
|
janet_asm_error(&a, "slot names must be symbols or tuple of symbols");
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Parse constants */
|
|
x = janet_get1(s, janet_csymbolv("constants"));
|
|
if (janet_indexed_view(x, &arr, &count)) {
|
|
def->constants_length = count;
|
|
def->constants = malloc(sizeof(Janet) * count);
|
|
if (NULL == def->constants) {
|
|
JANET_OUT_OF_MEMORY;
|
|
}
|
|
for (i = 0; i < count; i++) {
|
|
Janet ct = arr[i];
|
|
if (janet_checktype(ct, JANET_TUPLE) &&
|
|
janet_tuple_length(janet_unwrap_tuple(ct)) > 1 &&
|
|
janet_checktype(janet_unwrap_tuple(ct)[0], JANET_SYMBOL)) {
|
|
const Janet *t = janet_unwrap_tuple(ct);
|
|
int32_t tcount = janet_tuple_length(t);
|
|
const uint8_t *macro = janet_unwrap_symbol(t[0]);
|
|
if (0 == janet_cstrcmp(macro, "quote")) {
|
|
def->constants[i] = t[1];
|
|
} else if (tcount == 3 &&
|
|
janet_checktype(t[1], JANET_SYMBOL) &&
|
|
0 == janet_cstrcmp(macro, "def")) {
|
|
def->constants[i] = t[2];
|
|
janet_table_put(&a.constants, t[1], janet_wrap_integer(i));
|
|
} else {
|
|
janet_asm_errorv(&a, janet_formatc("could not parse constant \"%v\"", ct));
|
|
}
|
|
} else {
|
|
def->constants[i] = ct;
|
|
}
|
|
}
|
|
} else {
|
|
def->constants = NULL;
|
|
def->constants_length = 0;
|
|
}
|
|
|
|
/* Parse sub funcdefs */
|
|
x = janet_get1(s, janet_csymbolv("closures"));
|
|
if (janet_indexed_view(x, &arr, &count)) {
|
|
int32_t i;
|
|
for (i = 0; i < count; i++) {
|
|
JanetAssembleResult subres;
|
|
Janet subname;
|
|
int32_t newlen;
|
|
subres = janet_asm1(&a, arr[i], flags);
|
|
if (subres.status != JANET_ASSEMBLE_OK) {
|
|
janet_asm_errorv(&a, subres.error);
|
|
}
|
|
subname = janet_get1(arr[i], janet_csymbolv("name"));
|
|
if (!janet_checktype(subname, JANET_NIL)) {
|
|
janet_table_put(&a.defs, subname, janet_wrap_integer(def->defs_length));
|
|
}
|
|
newlen = def->defs_length + 1;
|
|
if (a.defs_capacity < newlen) {
|
|
int32_t newcap = newlen;
|
|
def->defs = realloc(def->defs, newcap * sizeof(JanetFuncDef *));
|
|
if (NULL == def->defs) {
|
|
JANET_OUT_OF_MEMORY;
|
|
}
|
|
a.defs_capacity = newcap;
|
|
}
|
|
def->defs[def->defs_length] = subres.funcdef;
|
|
def->defs_length = newlen;
|
|
}
|
|
}
|
|
|
|
/* Parse bytecode and labels */
|
|
x = janet_get1(s, janet_csymbolv("bytecode"));
|
|
if (janet_indexed_view(x, &arr, &count)) {
|
|
/* Do labels and find length */
|
|
int32_t blength = 0;
|
|
for (i = 0; i < count; ++i) {
|
|
Janet instr = arr[i];
|
|
if (janet_checktype(instr, JANET_SYMBOL)) {
|
|
janet_table_put(&a.labels, instr, janet_wrap_integer(blength));
|
|
} else if (janet_checktype(instr, JANET_TUPLE)) {
|
|
blength++;
|
|
} else {
|
|
a.errindex = i;
|
|
janet_asm_error(&a, "expected assembly instruction");
|
|
}
|
|
}
|
|
/* Allocate bytecode array */
|
|
def->bytecode_length = blength;
|
|
def->bytecode = malloc(sizeof(int32_t) * blength);
|
|
if (NULL == def->bytecode) {
|
|
JANET_OUT_OF_MEMORY;
|
|
}
|
|
/* Do bytecode */
|
|
for (i = 0; i < count; ++i) {
|
|
Janet instr = arr[i];
|
|
if (janet_checktype(instr, JANET_SYMBOL)) {
|
|
continue;
|
|
} else {
|
|
uint32_t op;
|
|
const JanetInstructionDef *idef;
|
|
const Janet *t;
|
|
a.errindex = i;
|
|
janet_asm_assert(&a, janet_checktype(instr, JANET_TUPLE), "expected tuple");
|
|
t = janet_unwrap_tuple(instr);
|
|
if (janet_tuple_length(t) == 0) {
|
|
op = 0;
|
|
} else {
|
|
janet_asm_assert(&a, janet_checktype(t[0], JANET_SYMBOL),
|
|
"expected symbol in assembly instruction");
|
|
idef = janet_strbinsearch(
|
|
&janet_ops,
|
|
sizeof(janet_ops)/sizeof(JanetInstructionDef),
|
|
sizeof(JanetInstructionDef),
|
|
janet_unwrap_symbol(t[0]));
|
|
if (NULL == idef)
|
|
janet_asm_errorv(&a, janet_formatc("unknown instruction %v", t[0]));
|
|
op = read_instruction(&a, idef, t);
|
|
}
|
|
def->bytecode[a.bytecode_count++] = op;
|
|
}
|
|
}
|
|
} else {
|
|
janet_asm_error(&a, "bytecode expected");
|
|
}
|
|
a.errindex = -1;
|
|
|
|
/* Check for source mapping */
|
|
x = janet_get1(s, janet_csymbolv("sourcemap"));
|
|
if (janet_indexed_view(x, &arr, &count)) {
|
|
janet_asm_assert(&a, count == def->bytecode_length, "sourcemap must have the same length as the bytecode");
|
|
def->sourcemap = malloc(sizeof(JanetSourceMapping) * count);
|
|
for (i = 0; i < count; i++) {
|
|
const Janet *tup;
|
|
Janet entry = arr[i];
|
|
JanetSourceMapping mapping;
|
|
if (!janet_checktype(entry, JANET_TUPLE)) {
|
|
janet_asm_error(&a, "expected tuple");
|
|
}
|
|
tup = janet_unwrap_tuple(entry);
|
|
if (!janet_checkint(tup[0])) {
|
|
janet_asm_error(&a, "expected integer");
|
|
}
|
|
if (!janet_checkint(tup[1])) {
|
|
janet_asm_error(&a, "expected integer");
|
|
}
|
|
mapping.start = janet_unwrap_integer(tup[0]);
|
|
mapping.end = janet_unwrap_integer(tup[1]);
|
|
def->sourcemap[i] = mapping;
|
|
}
|
|
}
|
|
|
|
/* Set environments */
|
|
def->environments =
|
|
realloc(def->environments, def->environments_length * sizeof(int32_t));
|
|
|
|
/* Verify the func def */
|
|
if (janet_verify(def)) {
|
|
janet_asm_error(&a, "invalid assembly");
|
|
}
|
|
|
|
/* Finish everything and return funcdef */
|
|
janet_asm_deinit(&a);
|
|
result.error = NULL;
|
|
result.funcdef = def;
|
|
result.status = JANET_ASSEMBLE_OK;
|
|
return result;
|
|
}
|
|
|
|
/* Assemble a function */
|
|
JanetAssembleResult janet_asm(Janet source, int flags) {
|
|
return janet_asm1(NULL, source, flags);
|
|
}
|
|
|
|
/* Disassembly */
|
|
|
|
/* Find the deinfintion of an instruction given the instruction word. Return
|
|
* NULL if not found. */
|
|
static const JanetInstructionDef *janet_asm_reverse_lookup(uint32_t instr) {
|
|
size_t i;
|
|
uint32_t opcode = instr & 0x7F;
|
|
for (i = 0; i < sizeof(janet_ops)/sizeof(JanetInstructionDef); i++) {
|
|
const JanetInstructionDef *def = janet_ops + i;
|
|
if (def->opcode == opcode)
|
|
return def;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* Create some constant sized tuples */
|
|
static Janet tup1(Janet x) {
|
|
Janet *tup = janet_tuple_begin(1);
|
|
tup[0] = x;
|
|
return janet_wrap_tuple(janet_tuple_end(tup));
|
|
}
|
|
static Janet tup2(Janet x, Janet y) {
|
|
Janet *tup = janet_tuple_begin(2);
|
|
tup[0] = x;
|
|
tup[1] = y;
|
|
return janet_wrap_tuple(janet_tuple_end(tup));
|
|
}
|
|
static Janet tup3(Janet x, Janet y, Janet z) {
|
|
Janet *tup = janet_tuple_begin(3);
|
|
tup[0] = x;
|
|
tup[1] = y;
|
|
tup[2] = z;
|
|
return janet_wrap_tuple(janet_tuple_end(tup));
|
|
}
|
|
static Janet tup4(Janet w, Janet x, Janet y, Janet z) {
|
|
Janet *tup = janet_tuple_begin(4);
|
|
tup[0] = w;
|
|
tup[1] = x;
|
|
tup[2] = y;
|
|
tup[3] = z;
|
|
return janet_wrap_tuple(janet_tuple_end(tup));
|
|
}
|
|
|
|
/* Given an argument, convert it to the appriate integer or symbol */
|
|
Janet janet_asm_decode_instruction(uint32_t instr) {
|
|
const JanetInstructionDef *def = janet_asm_reverse_lookup(instr);
|
|
Janet name;
|
|
if (NULL == def) {
|
|
return janet_wrap_integer((int32_t)instr);
|
|
}
|
|
name = janet_csymbolv(def->name);
|
|
#define oparg(shift, mask) ((instr >> ((shift) << 3)) & (mask))
|
|
switch (janet_instructions[def->opcode]) {
|
|
case JINT_0:
|
|
return tup1(name);
|
|
case JINT_S:
|
|
return tup2(name, janet_wrap_integer(oparg(1, 0xFFFFFF)));
|
|
case JINT_L:
|
|
return tup2(name, janet_wrap_integer((int32_t)instr >> 8));
|
|
case JINT_SS:
|
|
case JINT_ST:
|
|
case JINT_SC:
|
|
case JINT_SU:
|
|
case JINT_SD:
|
|
return tup3(name,
|
|
janet_wrap_integer(oparg(1, 0xFF)),
|
|
janet_wrap_integer(oparg(2, 0xFFFF)));
|
|
case JINT_SI:
|
|
case JINT_SL:
|
|
return tup3(name,
|
|
janet_wrap_integer(oparg(1, 0xFF)),
|
|
janet_wrap_integer((int32_t)instr >> 16));
|
|
case JINT_SSS:
|
|
case JINT_SES:
|
|
case JINT_SSU:
|
|
return tup4(name,
|
|
janet_wrap_integer(oparg(1, 0xFF)),
|
|
janet_wrap_integer(oparg(2, 0xFF)),
|
|
janet_wrap_integer(oparg(3, 0xFF)));
|
|
case JINT_SSI:
|
|
return tup4(name,
|
|
janet_wrap_integer(oparg(1, 0xFF)),
|
|
janet_wrap_integer(oparg(2, 0xFF)),
|
|
janet_wrap_integer((int32_t)instr >> 24));
|
|
}
|
|
#undef oparg
|
|
return janet_wrap_nil();
|
|
}
|
|
|
|
Janet janet_disasm(JanetFuncDef *def) {
|
|
int32_t i;
|
|
JanetArray *bcode = janet_array(def->bytecode_length);
|
|
JanetArray *constants;
|
|
JanetTable *ret = janet_table(10);
|
|
janet_table_put(ret, janet_csymbolv("arity"), janet_wrap_integer(def->arity));
|
|
janet_table_put(ret, janet_csymbolv("bytecode"), janet_wrap_array(bcode));
|
|
if (NULL != def->source) {
|
|
janet_table_put(ret, janet_csymbolv("source"), janet_wrap_string(def->source));
|
|
}
|
|
if (def->flags & JANET_FUNCDEF_FLAG_VARARG) {
|
|
janet_table_put(ret, janet_csymbolv("vararg"), janet_wrap_true());
|
|
}
|
|
if (def->flags & JANET_FUNCDEF_FLAG_FIXARITY) {
|
|
janet_table_put(ret, janet_csymbolv("fix-arity"), janet_wrap_true());
|
|
}
|
|
if (NULL != def->name) {
|
|
janet_table_put(ret, janet_csymbolv("name"), janet_wrap_string(def->name));
|
|
}
|
|
|
|
/* Add constants */
|
|
if (def->constants_length > 0) {
|
|
constants = janet_array(def->constants_length);
|
|
janet_table_put(ret, janet_csymbolv("constants"), janet_wrap_array(constants));
|
|
for (i = 0; i < def->constants_length; i++) {
|
|
Janet src = def->constants[i];
|
|
Janet dest;
|
|
if (janet_checktype(src, JANET_TUPLE)) {
|
|
dest = tup2(janet_csymbolv("quote"), src);
|
|
} else {
|
|
dest = src;
|
|
}
|
|
constants->data[i] = dest;
|
|
}
|
|
constants->count = def->constants_length;
|
|
}
|
|
|
|
/* Add bytecode */
|
|
for (i = 0; i < def->bytecode_length; i++) {
|
|
bcode->data[i] = janet_asm_decode_instruction(def->bytecode[i]);
|
|
}
|
|
bcode->count = def->bytecode_length;
|
|
|
|
/* Add source map */
|
|
if (NULL != def->sourcemap) {
|
|
JanetArray *sourcemap = janet_array(def->bytecode_length);
|
|
for (i = 0; i < def->bytecode_length; i++) {
|
|
Janet *t = janet_tuple_begin(2);
|
|
JanetSourceMapping mapping = def->sourcemap[i];
|
|
t[0] = janet_wrap_integer(mapping.start);
|
|
t[1] = janet_wrap_integer(mapping.end);
|
|
sourcemap->data[i] = janet_wrap_tuple(janet_tuple_end(t));
|
|
}
|
|
sourcemap->count = def->bytecode_length;
|
|
janet_table_put(ret, janet_csymbolv("sourcemap"), janet_wrap_array(sourcemap));
|
|
}
|
|
|
|
/* Add environments */
|
|
if (NULL != def->environments) {
|
|
JanetArray *envs = janet_array(def->environments_length);
|
|
for (i = 0; i < def->environments_length; i++) {
|
|
envs->data[i] = janet_wrap_integer(def->environments[i]);
|
|
}
|
|
envs->count = def->environments_length;
|
|
janet_table_put(ret, janet_csymbolv("environments"), janet_wrap_array(envs));
|
|
}
|
|
|
|
/* Add closures */
|
|
/* Funcdefs cannot be recursive */
|
|
if (NULL != def->defs) {
|
|
JanetArray *defs = janet_array(def->defs_length);
|
|
for (i = 0; i < def->defs_length; i++) {
|
|
defs->data[i] = janet_disasm(def->defs[i]);
|
|
}
|
|
defs->count = def->defs_length;
|
|
janet_table_put(ret, janet_csymbolv("defs"), janet_wrap_array(defs));
|
|
}
|
|
|
|
/* Add slotcount */
|
|
janet_table_put(ret, janet_csymbolv("slotcount"), janet_wrap_integer(def->slotcount));
|
|
|
|
return janet_wrap_struct(janet_table_to_struct(ret));
|
|
}
|
|
|
|
/* C Function for assembly */
|
|
static int cfun_asm(JanetArgs args) {
|
|
JanetAssembleResult res;
|
|
JANET_FIXARITY(args, 1);
|
|
res = janet_asm(args.v[0], 0);
|
|
if (res.status == JANET_ASSEMBLE_OK) {
|
|
JANET_RETURN_FUNCTION(args, janet_thunk(res.funcdef));
|
|
} else {
|
|
JANET_THROWV(args, janet_wrap_string(res.error));
|
|
}
|
|
}
|
|
|
|
static int cfun_disasm(JanetArgs args) {
|
|
JanetFunction *f;
|
|
JANET_FIXARITY(args, 1);
|
|
JANET_ARG_FUNCTION(f, args, 0);
|
|
JANET_RETURN(args, janet_disasm(f->def));
|
|
}
|
|
|
|
static const JanetReg cfuns[] = {
|
|
{"asm", cfun_asm,
|
|
"(asm assembly)\n\n"
|
|
"Returns a new function that is the compiled result of the assembly.\n"
|
|
"The syntax for the assembly can be found on the janet wiki. Will throw an\n"
|
|
"error on invalid assembly."
|
|
},
|
|
{"disasm", cfun_disasm,
|
|
"(disasm func)\n\n"
|
|
"Returns assembly that could be used be compile the given function.\n"
|
|
"func must be a function, not a c function. Will throw on error on a badly\n"
|
|
"typed argument."
|
|
},
|
|
{NULL, NULL, NULL}
|
|
};
|
|
|
|
/* Load the library */
|
|
int janet_lib_asm(JanetArgs args) {
|
|
JanetTable *env = janet_env(args);
|
|
janet_cfuns(env, NULL, cfuns);
|
|
return 0;
|
|
}
|
|
|
|
#endif
|