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|
/*
** $Id: lfunc.c,v 2.12.1.2 2007/12/28 14:58:43 roberto Exp $
** Auxiliary functions to manipulate prototypes and closures
** See Copyright Notice in lua.h
*/
#include <stddef.h>
#define lfunc_c
#define LUA_CORE
#include "lua.h"
#include "lfunc.h"
#include "lgc.h"
#include "lmem.h"
#include "lobject.h"
#include "lstate.h"
Closure *luaF_newCclosure (lua_State *L, int nelems, Table *e) {
Closure *c = cast(Closure *, luaM_malloc(L, sizeCclosure(nelems)));
luaC_link(L, obj2gco(c), LUA_TFUNCTION);
c->c.isC = 1;
c->c.env = e;
c->c.nupvalues = cast_byte(nelems);
return c;
}
Closure *luaF_newLclosure (lua_State *L, int nelems, Table *e) {
Closure *c = cast(Closure *, luaM_malloc(L, sizeLclosure(nelems)));
luaC_link(L, obj2gco(c), LUA_TFUNCTION);
c->l.isC = 0;
c->l.env = e;
c->l.nupvalues = cast_byte(nelems);
while (nelems--) c->l.upvals[nelems] = NULL;
return c;
}
UpVal *luaF_newupval (lua_State *L) {
UpVal *uv = luaM_new(L, UpVal);
luaC_link(L, obj2gco(uv), LUA_TUPVAL);
uv->v = &uv->u.value;
setnilvalue(uv->v);
return uv;
}
UpVal *luaF_findupval (lua_State *L, StkId level) {
global_State *g = G(L);
GCObject **pp = &L->openupval;
UpVal *p;
UpVal *uv;
while (*pp != NULL && (p = ngcotouv(*pp))->v >= level) {
lua_assert(p->v != &p->u.value);
if (p->v == level) { /* found a corresponding upvalue? */
if (isdead(g, obj2gco(p))) /* is it dead? */
changewhite(obj2gco(p)); /* ressurect it */
return p;
}
pp = &p->next;
}
uv = luaM_new(L, UpVal); /* not found: create a new one */
uv->tt = LUA_TUPVAL;
uv->marked = luaC_white(g);
uv->v = level; /* current value lives in the stack */
uv->next = *pp; /* chain it in the proper position */
*pp = obj2gco(uv);
uv->u.l.prev = &g->uvhead; /* double link it in `uvhead' list */
uv->u.l.next = g->uvhead.u.l.next;
uv->u.l.next->u.l.prev = uv;
g->uvhead.u.l.next = uv;
lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv);
return uv;
}
static void unlinkupval (UpVal *uv) {
lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv);
uv->u.l.next->u.l.prev = uv->u.l.prev; /* remove from `uvhead' list */
uv->u.l.prev->u.l.next = uv->u.l.next;
}
void luaF_freeupval (lua_State *L, UpVal *uv) {
if (uv->v != &uv->u.value) /* is it open? */
unlinkupval(uv); /* remove from open list */
luaM_free(L, uv); /* free upvalue */
}
void luaF_close (lua_State *L, StkId level) {
UpVal *uv;
global_State *g = G(L);
while (L->openupval != NULL && (uv = ngcotouv(L->openupval))->v >= level) {
GCObject *o = obj2gco(uv);
lua_assert(!isblack(o) && uv->v != &uv->u.value);
L->openupval = uv->next; /* remove from `open' list */
if (isdead(g, o))
luaF_freeupval(L, uv); /* free upvalue */
else {
unlinkupval(uv);
setobj(L, &uv->u.value, uv->v);
uv->v = &uv->u.value; /* now current value lives here */
luaC_linkupval(L, uv); /* link upvalue into `gcroot' list */
}
}
}
Proto *luaF_newproto (lua_State *L) {
Proto *f = luaM_new(L, Proto);
luaC_link(L, obj2gco(f), LUA_TPROTO);an class="hl str"> tst.l %d0
jeq .exit | zero samples to process, exit
moveq.l #10, %d3
cmp.l %d3, %d2
jgt .default | order is over 10, jump to default case
jmp.l (2, %pc, %d2.l*4) | jump to loop corresponding to pred_order
| jumptable:
bra.w .exit | zero order filter isn't possible, exit function
bra.w .order1
bra.w .order2
bra.w .order3
bra.w .order4
bra.w .order5
bra.w .order6
bra.w .order7
bra.w .order8
bra.w .order9
| last jump table entry coincides with target, so leave it out
.order10:
movem.l (%a1), %d3-%d7/%a1-%a5 | load lpc coefs
move.l (%a0)+, %a6 | load first history sample
1:
mac.l %a6, %a5, (%a0)+, %a6, %acc0
mac.l %a6, %a4, (%a0)+, %a6, %acc0
mac.l %a6, %a3, (%a0)+, %a6, %acc0
mac.l %a6, %a2, (%a0)+, %a6, %acc0
mac.l %a6, %a1, (%a0)+, %a6, %acc0
mac.l %a6, %d7, (%a0)+, %a6, %acc0
mac.l %a6, %d6, (%a0)+, %a6, %acc0
mac.l %a6, %d5, (%a0)+, %a6, %acc0
mac.l %a6, %d4, (%a0)+, %a6, %acc0
mac.l %a6, %d3, (-9*4, %a0), %a6, %acc0 | load for the next iteration
movclr.l %acc0, %d2 | get sum
asr.l %d1, %d2 | shift sum by qlevel bits
add.l %d2, (%a0) | add residual and save
lea.l (-8*4, %a0), %a0 | point history back at second element
subq.l #1, %d0 | decrement sample count
jne 1b | are we done?
jra .exit
.order9:
movem.l (%a1), %d4-%d7/%a1-%a5
move.l (%a0)+, %a6
1:
mac.l %a6, %a5, (%a0)+, %a6, %acc0
mac.l %a6, %a4, (%a0)+, %a6, %acc0
mac.l %a6, %a3, (%a0)+, %a6, %acc0
mac.l %a6, %a2, (%a0)+, %a6, %acc0
mac.l %a6, %a1, (%a0)+, %a6, %acc0
mac.l %a6, %d7, (%a0)+, %a6, %acc0
mac.l %a6, %d6, (%a0)+, %a6, %acc0
mac.l %a6, %d5, (%a0)+, %a6, %acc0
mac.l %a6, %d4, (-8*4, %a0), %a6, %acc0
movclr.l %acc0, %d2
asr.l %d1, %d2
add.l %d2, (%a0)
lea.l (-7*4, %a0), %a0
subq.l #1, %d0
jne 1b
jra .exit
.order8:
movem.l (%a1), %d5-%d7/%a1-%a5
move.l (%a0)+, %a6
1:
mac.l %a6, %a5, (%a0)+, %a6, %acc0
mac.l %a6, %a4, (%a0)+, %a6, %acc0
mac.l %a6, %a3, (%a0)+, %a6, %acc0
mac.l %a6, %a2, (%a0)+, %a6, %acc0
mac.l %a6, %a1, (%a0)+, %a6, %acc0
mac.l %a6, %d7, (%a0)+, %a6, %acc0
mac.l %a6, %d6, (%a0)+, %a6, %acc0
mac.l %a6, %d5, (-7*4, %a0), %a6, %acc0
movclr.l %acc0, %d2
asr.l %d1, %d2
add.l %d2, (%a0)
lea.l (-6*4, %a0), %a0
subq.l #1, %d0
jne 1b
jra .exit
.order7:
movem.l (%a1), %d6-%d7/%a1-%a5
move.l (%a0)+, %a6
1:
mac.l %a6, %a5, (%a0)+, %a6, %acc0
mac.l %a6, %a4, (%a0)+, %a6, %acc0
mac.l %a6, %a3, (%a0)+, %a6, %acc0
mac.l %a6, %a2, (%a0)+, %a6, %acc0
mac.l %a6, %a1, (%a0)+, %a6, %acc0
mac.l %a6, %d7, (%a0)+, %a6, %acc0
mac.l %a6, %d6, (-6*4, %a0), %a6, %acc0
movclr.l %acc0, %d2
asr.l %d1, %d2
add.l %d2, (%a0)
lea.l (-5*4, %a0), %a0
subq.l #1, %d0
jne 1b
jra .exit
.order6:
movem.l (%a1), %d7/%a1-%a5
move.l (%a0)+, %a6
1:
mac.l %a6, %a5, (%a0)+, %a6, %acc0
mac.l %a6, %a4, (%a0)+, %a6, %acc0
mac.l %a6, %a3, (%a0)+, %a6, %acc0
mac.l %a6, %a2, (%a0)+, %a6, %acc0
mac.l %a6, %a1, (%a0)+, %a6, %acc0
mac.l %a6, %d7, (-5*4, %a0), %a6, %acc0
movclr.l %acc0, %d2
asr.l %d1, %d2
add.l %d2, (%a0)
lea.l (-4*4, %a0), %a0
subq.l #1, %d0
jne 1b
jra .exit
.order5:
movem.l (%a1), %a1-%a5
move.l (%a0)+, %a6
1:
mac.l %a6, %a5, (%a0)+, %a6, %acc0
mac.l %a6, %a4, (%a0)+, %a6, %acc0
mac.l %a6, %a3, (%a0)+, %a6, %acc0
mac.l %a6, %a2, (%a0)+, %a6, %acc0
mac.l %a6, %a1, (-4*4, %a0), %a6, %acc0
movclr.l %acc0, %d2
asr.l %d1, %d2
add.l %d2, (%a0)
lea.l (-3*4, %a0), %a0
subq.l #1, %d0
jne 1b
jra .exit
.order4:
movem.l (%a1), %a2-%a5
move.l (%a0)+, %a6
1:
mac.l %a6, %a5, (%a0)+, %a6, %acc0
mac.l %a6, %a4, (%a0)+, %a6, %acc0
mac.l %a6, %a3, (%a0)+, %a6, %acc0
mac.l %a6, %a2, (-3*4, %a0), %a6, %acc0
movclr.l %acc0, %d2
asr.l %d1, %d2
add.l %d2, (%a0)
subq.l #8, %a0
subq.l #1, %d0
jne 1b
jra .exit
.order3:
movem.l (%a1), %a3-%a5
move.l (%a0)+, %a6
1:
mac.l %a6, %a5, (%a0)+, %a6, %acc0
mac.l %a6, %a4, (%a0)+, %a6, %acc0
mac.l %a6, %a3, (-2*4, %a0), %a6, %acc0
movclr.l %acc0, %d2
asr.l %d1, %d2
add.l %d2, (%a0)
subq.l #4, %a0
subq.l #1, %d0
jne 1b
jra .exit
.order2:
movem.l (%a1), %a4-%a5
move.l (%a0)+, %a6
1:
mac.l %a6, %a5, (%a0)+, %a6, %acc0
mac.l %a6, %a4, %acc0 | data for next iteration is already loaded
movclr.l %acc0, %d2
asr.l %d1, %d2
add.l %d2, (%a0)
subq.l #1, %d0
jne 1b
jra .exit
.order1:
| no point in using mac here
move.l (%a1), %a5
1:
move.l %a5, %d2
muls.l (%a0)+, %d2
asr.l %d1, %d2
add.l %d2, (%a0)
subq.l #1, %d0
jne 1b
jra .exit
.default:
/* we do the filtering in an unrolled by 4 loop as far as we can, and then
do the rest by jump table. */
lea.l (%a1, %d2.l*4), %a2 | need to start in the other end of coefs
move.l %a0, %a3 | working copy of history pointer
move.l %d2, %d3
lsr.l #2, %d3 | coefs/4, num of iterations needed in next loop
move.l (%a3)+, %a5 | preload data for loop
1:
lea.l (-4*4, %a2), %a2 | move lpc coef pointer four samples backwards
movem.l (%a2), %d4-%d7 | load four coefs
mac.l %a5, %d7, (%a3)+, %a5, %acc0
mac.l %a5, %d6, (%a3)+, %a5, %acc0
mac.l %a5, %d5, (%a3)+, %a5, %acc0
mac.l %a5, %d4, (%a3)+, %a5, %acc0
subq.l #1, %d3 | any more unrolled loop operations left?
jne 1b
moveq.l #3, %d3 | mask 0x00000003
and.l %d2, %d3 | get the remaining samples to be filtered
jmp.l (2, %pc, %d3*2) | then jump into mac.l chain
| jumptable:
bra.b 3f | none left
bra.b 2f | one left
bra.b 1f | two left
| three left
move.l -(%a2), %d4
mac.l %a5, %d4, (%a3)+, %a5, %acc0
1:
move.l -(%a2), %d4
mac.l %a5, %d4, (%a3)+, %a5, %acc0
2:
move.l -(%a2), %d4
mac.l %a5, %d4, (%a3)+, %a5, %acc0
3:
movclr.l %acc0, %d3 | get result
asr.l %d1, %d3 | shift qlevel bits right
add.l %a5, %d3 | add residual, which is in a5 by now
move.l %d3, -(%a3) | save, a3 is also one past save location
addq.l #4, %a0 | increment history pointer
subq.l #1, %d0 | decrement sample count
jne .default | are we done?
jra .exit | if so, fall through to exit
/* This routine deals with sample widths 24 and lower. All LPC filtering up to
order 8 is done in specially optimised unrolled loops, while every order
above this is handled by a slower default routine.
*/
.global lpc_decode_emac_wide
.align 2
lpc_decode_emac_wide:
lea.l (-44, %sp), %sp
movem.l %d2-%d7/%a2-%a6, (%sp)
movem.l (44+4, %sp), %d0-%d1/%d3/%a0-%a1
/* d0 = blocksize, d1 = qlevel, d3 = pred_order
a0 = data, a1 = coeffs
*/
/* the data pointer always lags behind history pointer by 'pred_order'
samples. since we have one loop for each order, we can hard code this
and free a register by not saving data pointer.
*/
move.l %d3, %d2
neg.l %d2
lea.l (%a0, %d2.l*4), %a0 | history
clr.l %d2
move.l %d2, %macsr | we'll need integer mode for this
tst.l %d0
jeq .exit | zero samples to process, exit
moveq.l #32, %d2
sub.l %d1, %d2 | calculate shift amount for extension byte
moveq.l #8, %d4
cmp.l %d4, %d3
jgt .wdefault | order is over 8, jump to default case
jmp.l (2, %pc, %d3.l*4) | jump to loop corresponding to pred_order
| jumptable:
bra.w .exit | zero order filter isn't possible, exit function
bra.w .worder1
bra.w .worder2
bra.w .worder3
bra.w .worder4
bra.w .worder5
bra.w .worder6
bra.w .worder7
| last jump table entry coincides with target, so leave it out
.worder8:
movem.l (%a1), %d5-%d7/%a1-%a5 | load lpc coefs
move.l (%a0)+, %a6 | load first history sample
1:
mac.l %a6, %a5, (%a0)+, %a6, %acc0
mac.l %a6, %a4, (%a0)+, %a6, %acc0
mac.l %a6, %a3, (%a0)+, %a6, %acc0
mac.l %a6, %a2, (%a0)+, %a6, %acc0
mac.l %a6, %a1, (%a0)+, %a6, %acc0
mac.l %a6, %d7, (%a0)+, %a6, %acc0
mac.l %a6, %d6, (%a0)+, %a6, %acc0
mac.l %a6, %d5, (-7*4, %a0), %a6, %acc0 | load for the next iteration
move.l %accext01, %d4 | get top 8 bits of sum
movclr.l %acc0, %d3 | then botten 32 bits
lsr.l %d1, %d3 | shift bottom bits qlevel bits right
asl.l %d2, %d4 | shift top bits 32 - qlevel bits left
or.l %d4, %d3 | now combine results
add.l %d3, (%a0) | add residual and save
lea.l (-6*4, %a0), %a0 | point history back at second element
subq.l #1, %d0 | decrement sample count
jne 1b | are we done?
jra .exit
.worder7:
movem.l (%a1), %d6-%d7/%a1-%a5
move.l (%a0)+, %a6
1:
mac.l %a6, %a5, (%a0)+, %a6, %acc0
mac.l %a6, %a4, (%a0)+, %a6, %acc0
mac.l %a6, %a3, (%a0)+, %a6, %acc0
mac.l %a6, %a2, (%a0)+, %a6, %acc0
mac.l %a6, %a1, (%a0)+, %a6, %acc0
mac.l %a6, %d7, (%a0)+, %a6, %acc0
mac.l %a6, %d6, (-6*4, %a0), %a6, %acc0
move.l %accext01, %d4
movclr.l %acc0, %d3
lsr.l %d1, %d3
asl.l %d2, %d4
or.l %d4, %d3
add.l %d3, (%a0)
lea.l (-5*4, %a0), %a0
subq.l #1, %d0
jne 1b
jra .exit
.worder6:
movem.l (%a1), %d7/%a1-%a5
move.l (%a0)+, %a6
1:
mac.l %a6, %a5, (%a0)+, %a6, %acc0
mac.l %a6, %a4, (%a0)+, %a6, %acc0
mac.l %a6, %a3, (%a0)+, %a6, %acc0
mac.l %a6, %a2, (%a0)+, %a6, %acc0
mac.l %a6, %a1, (%a0)+, %a6, %acc0
mac.l %a6, %d7, (-5*4, %a0), %a6, %acc0
move.l %accext01, %d4
movclr.l %acc0, %d3
lsr.l %d1, %d3
asl.l %d2, %d4
or.l %d4, %d3
add.l %d3, (%a0)
lea.l (-4*4, %a0), %a0
subq.l #1, %d0
jne 1b
jra .exit
.worder5:
movem.l (%a1), %a1-%a5
move.l (%a0)+, %a6
1:
mac.l %a6, %a5, (%a0)+, %a6, %acc0
mac.l %a6, %a4, (%a0)+, %a6, %acc0
mac.l %a6, %a3, (%a0)+, %a6, %acc0
mac.l %a6, %a2, (%a0)+, %a6, %acc0
mac.l %a6, %a1, (-4*4, %a0), %a6, %acc0
move.l %accext01, %d4
movclr.l %acc0, %d3
lsr.l %d1, %d3
asl.l %d2, %d4
or.l %d4, %d3
add.l %d3, (%a0)
lea.l (-3*4, %a0), %a0
subq.l #1, %d0
jne 1b
jra .exit
.worder4:
movem.l (%a1), %a2-%a5
move.l (%a0)+, %a6
1:
mac.l %a6, %a5, (%a0)+, %a6, %acc0
mac.l %a6, %a4, (%a0)+, %a6, %acc0
mac.l %a6, %a3, (%a0)+, %a6, %acc0
mac.l %a6, %a2, (-3*4, %a0), %a6, %acc0
move.l %accext01, %d4
movclr.l %acc0, %d3
lsr.l %d1, %d3
asl.l %d2, %d4
or.l %d4, %d3
add.l %d3, (%a0)
subq.l #8, %a0
subq.l #1, %d0
jne 1b
jra .exit
.worder3:
movem.l (%a1), %a3-%a5
move.l (%a0)+, %a6
1:
mac.l %a6, %a5, (%a0)+, %a6, %acc0
mac.l %a6, %a4, (%a0)+, %a6, %acc0
mac.l %a6, %a3, (-2*4, %a0), %a6, %acc0
move.l %accext01, %d4
movclr.l %acc0, %d3
lsr.l %d1, %d3
asl.l %d2, %d4
or.l %d4, %d3
add.l %d3, (%a0)
subq.l #4, %a0
subq.l #1, %d0
jne 1b
jra .exit
.worder2:
movem.l (%a1), %a4-%a5
move.l (%a0)+, %a6
1:
mac.l %a6, %a5, (%a0)+, %a6, %acc0
mac.l %a6, %a4, %acc0 | data for next iteration is already loaded
move.l %accext01, %d4
movclr.l %acc0, %d3
lsr.l %d1, %d3
asl.l %d2, %d4
or.l %d4, %d3
add.l %d3, (%a0)
subq.l #1, %d0
jne 1b
jra .exit
.worder1:
move.l (%a1), %a5
move.l (%a0)+, %a6
1:
mac.l %a6, %a5, (%a0), %a6, %acc0
move.l %accext01, %d4
movclr.l %acc0, %d3
lsr.l %d1, %d3
asl.l %d2, %d4
or.l %d4, %d3
add.l %a6, %d3 | residual is already in a6
move.l %d3, (%a0)+
subq.l #1, %d0
jne 1b
jra .exit
.wdefault:
/* we do the filtering in an unrolled by 4 loop as far as we can, and then
do the rest by jump table. */
lea.l (%a1, %d3.l*4), %a2 | need to start in the other end of coefs
move.l %a0, %a3 | working copy of history pointer
move.l %d3, %d4
lsr.l #2, %d4 | coefs/4, num of iterations needed in next loop
move.l (%a3)+, %a5 | preload data for loop
1:
lea.l (-4*4, %a2), %a2 | move lpc coef pointer four samples backwards
movem.l (%a2), %d5-%d7/%a4 | load four coefs
mac.l %a5, %a4, (%a3)+, %a5, %acc0
mac.l %a5, %d7, (%a3)+, %a5, %acc0
mac.l %a5, %d6, (%a3)+, %a5, %acc0
mac.l %a5, %d5, (%a3)+, %a5, %acc0
subq.l #1, %d4 | any more unrolled loop operations left?
jne 1b
moveq.l #3, %d4 | mask 0x00000003
and.l %d3, %d4 | get the remaining samples to be filtered
jmp.l (2, %pc, %d4*2) | then jump into mac.l chain
| jumptable:
bra.b 3f | none left
bra.b 2f | one left
bra.b 1f | two left
| three left
move.l -(%a2), %d4
mac.l %a5, %d4, (%a3)+, %a5, %acc0
1:
move.l -(%a2), %d4
mac.l %a5, %d4, (%a3)+, %a5, %acc0
2:
move.l -(%a2), %d4
mac.l %a5, %d4, (%a3)+, %a5, %acc0
3:
move.l %accext01, %d5 | get high 32 bits of result
movclr.l %acc0, %d4 | get low 32 bits of result
lsr.l %d1, %d4 | shift qlevel bits right
asl.l %d2, %d5 | shift 32 - qlevel bits left
or.l %d5, %d4 | combine top and low bits after shift
add.l %a5, %d4 | add residual, which is in a5 by now
move.l %d4, -(%a3) | save, a3 is also one past save location
addq.l #4, %a0 | increment history pointer
subq.l #1, %d0 | decrement sample count
jne .wdefault | are we done?
| if so, fall through to exit
.exit:
movem.l (%sp), %d2-%d7/%a2-%a6
lea.l (44, %sp), %sp
rts
|
