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function.c
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/
function.c
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#include "common.h"
#include "function.h"
#include "generic_list.h"
LIST(funclist, function_t);
funclist_t *funclist;
jit_context_t jit_context;
jit_function_t get_function_by_name(char *name) {
funclistitem_t *cur;
LOGF("Looking for %s", name);
for (cur = funclist->head; cur; cur = cur->next)
if (STREQ(cur->data.name, name))
return cur->data.func;
LOGF("Not found");
return NULL;
}
typedef struct op_t {
enum {
OP_CALL = -1,
OP_NULLARY = 0,
OP_UNARY = 1,
OP_BINARY = 2,
OP_TERNARY = 3
} nargs;
jit_value_t (*insn)();
} op_t;
/*
#define OPS_COUNT 11
static const ops[OPS_COUNT] = {
// nargs func
{ OP_CALL, NULL },
{ OP_BINARY, &jit_insn_add},
{ OP_BINARY, &jit_insn_sub},
{ OP_BINARY, &jit_insn_mul},
{ OP_BINARY, &jit_insn_div},
{ OP_BINARY, &jit_insn_rem},
{ OP_BINARY, &jit_insn_gt},
{ OP_BINARY, &jit_insn_lt},
{ OP_UNARY, &jit_insn_sin},
{ OP_BINARY, &jit_insn_gt},
{ OP_BINARY, &jit_insn_lt}};
*/
static jit_value_t const_rate,
const_pi,
val_freq,
val_sample,
val_length;
static jit_value_t parse_recursive(jit_function_t func) {
jit_value_t arg1, arg2, result;
jit_function_t func1;
double val;
char *t = token();
// Somebody, do something with this!
// It's awful monkeycoding, but I'm too lazy to rewrite it :3
if (STREQ(t, "F"))
result = val_freq;
else if (STREQ(t, "X"))
result = jit_insn_convert(func, val_sample, jit_type_float64, 0);
else if (STREQ(t, "LEN"))
result = jit_insn_convert(func, val_length, jit_type_float64, 0);
else if (STREQ(t, "RATE"))
result = const_rate;
else if (STREQ(t, "PI"))
result = const_pi;
else if (STREQ(t, "+"))
result = jit_insn_add(func, parse_recursive(func), parse_recursive(func));
else if (STREQ(t, "-")) {
arg1 = parse_recursive(func);
arg2 = parse_recursive(func);
result = jit_insn_sub(func, arg1, arg2);
}
else if (STREQ(t, "*"))
result = jit_insn_mul(func, parse_recursive(func), parse_recursive(func));
else if (STREQ(t, "/")) {
arg1 = parse_recursive(func);
arg2 = parse_recursive(func);
result = jit_insn_div(func, arg1, arg2);
}
else if (STREQ(t, "%")) {
arg1 = parse_recursive(func);
arg2 = parse_recursive(func);
result = jit_insn_rem(func, arg1, arg2);
}
else if (STREQ(t, ">")) {
arg1 = parse_recursive(func);
arg2 = parse_recursive(func);
result = jit_insn_gt(func, arg1, arg2);
}
else if (STREQ(t, "<")) {
arg1 = parse_recursive(func);
arg2 = parse_recursive(func);
result = jit_insn_lt(func, arg1, arg2);
}
else if (STREQ(t, "if")) {
jit_value_t tmpval = jit_value_create(func, jit_type_float64);
jit_label_t lb_false = jit_label_undefined,
lb_end = jit_label_undefined;
jit_insn_branch_if_not(func, jit_insn_to_bool(func, parse_recursive(func)), &lb_false);
jit_insn_store(func, tmpval, parse_recursive(func));
jit_insn_branch(func, &lb_end);
jit_insn_label(func, &lb_false);
jit_insn_store(func, tmpval, parse_recursive(func));
jit_insn_label(func, &lb_end);
result = jit_insn_load(func, tmpval);
}
else if (STREQ(t, "sin"))
result = jit_insn_sin(func, parse_recursive(func));
else if (sscanf(t, "%lf", &val) == 1)
result = jit_value_create_float64_constant(func, jit_type_float64, val);
else if ((func1 = get_function_by_name(t)) != NULL) {
arg1 = parse_recursive(func);
arg2 = parse_recursive(func);
jit_value_t args[3] = {arg1, arg2, val_length};
result = jit_insn_call(
func,
t,
func1,
NULL,
args,
3,
0);
}
else {
LOGF("Unexpected token '%s'", t);
result = NULL;
}
free(t);
return result;
}
jit_function_t parse_function() {
jit_type_t params[3] = {jit_type_float64, jit_type_nuint, jit_type_nuint},
signature = jit_type_create_signature(jit_abi_cdecl, jit_type_float64, params, 3, 1);
jit_function_t func = jit_function_create(jit_context, signature);
const_rate = jit_value_create_float64_constant(func, jit_type_float64, (double)RATE),
const_pi = jit_value_create_float64_constant(func, jit_type_float64, (double)M_PI),
val_freq = jit_value_get_param(func, 0);
val_sample = jit_value_get_param(func, 1);
val_length = jit_value_get_param(func, 2);
jit_insn_return(func, parse_recursive(func));
jit_function_compile(func);
return func;
}
void add_function(char *name, jit_function_t func) {
function_t t;
memset(&t, 0, sizeof(function_t));
t.name = name;
t.func = func;
list_add_tail(funclist, funclist, t);
}
void function_init() {
funclist = list_new(funclist);
jit_context = jit_context_create();
jit_context_build_start(jit_context);
}
void function_destroy() {
list_free(funclist, funclist);
jit_context_build_end(jit_context);
jit_context_destroy(jit_context);
}