gstreamer/subprojects/gst-plugins-good/gst/goom/mmx.c

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/* mmx.c
MultiMedia eXtensions GCC interface library for IA32.
To use this library, simply include this header file
and compile with GCC. You MUST have inlining enabled
in order for mmx_ok() to work; this can be done by
simply using -O on the GCC command line.
Compiling with -DMMX_TRACE will cause detailed trace
output to be sent to stderr for each mmx operation.
This adds lots of code, and obviously slows execution to
a crawl, but can be very useful for debugging.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR ANY PARTICULAR PURPOSE.
1997-99 by H. Dietz and R. Fisher
Notes:
It appears that the latest gas has the pand problem fixed, therefore
I'll undefine BROKEN_PAND by default.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "goom_config.h"
#ifdef HAVE_MMX
#define BUFFPOINTNB 16
#define BUFFPOINTMASK 0xffff
#define BUFFINCR 0xff
#include "mmx.h"
#include "goom_graphic.h"
#define sqrtperte 16
// faire : a % sqrtperte <=> a & pertemask
#define PERTEMASK 0xf
// faire : a / sqrtperte <=> a >> PERTEDEC
#define PERTEDEC 4
int
mmx_supported (void)
{
return (mm_support () & 0x1);
}
void
zoom_filter_mmx (int prevX, int prevY,
Pixel * expix1, Pixel * expix2,
int *brutS, int *brutD, int buffratio, int precalCoef[16][16])
{
unsigned int ax = (prevX - 1) << PERTEDEC, ay = (prevY - 1) << PERTEDEC;
int bufsize = prevX * prevY;
int loop;
__asm__ __volatile__ ("pxor %mm7,%mm7");
for (loop = 0; loop < bufsize; loop++) {
/* int couleur; */
int px, py;
int pos;
int coeffs;
int myPos = loop << 1, myPos2 = myPos + 1;
int brutSmypos = brutS[myPos];
px = brutSmypos + (((brutD[myPos] -
brutSmypos) * buffratio) >> BUFFPOINTNB);
brutSmypos = brutS[myPos2];
py = brutSmypos + (((brutD[myPos2] -
brutSmypos) * buffratio) >> BUFFPOINTNB);
if ((py >= ay) || (px >= ax)) {
pos = coeffs = 0;
} else {
pos = ((px >> PERTEDEC) + prevX * (py >> PERTEDEC));
// coef en modulo 15
coeffs = precalCoef[px & PERTEMASK][py & PERTEMASK];
}
__asm__ __volatile__ ("movd %2, %%mm6 \n\t"
/* recuperation des deux premiers pixels dans mm0 et mm1 */
"movq (%3,%1,4), %%mm0 \n\t" /* b1-v1-r1-a1-b2-v2-r2-a2 */
"movq %%mm0, %%mm1 \n\t" /* b1-v1-r1-a1-b2-v2-r2-a2 */
/* depackage du premier pixel */
"punpcklbw %%mm7, %%mm0 \n\t" /* 00-b2-00-v2-00-r2-00-a2 */
"movq %%mm6, %%mm5 \n\t" /* ??-??-??-??-c4-c3-c2-c1 */
/* depackage du 2ieme pixel */
"punpckhbw %%mm7, %%mm1 \n\t" /* 00-b1-00-v1-00-r1-00-a1 */
/* extraction des coefficients... */
"punpcklbw %%mm5, %%mm6 \n\t" /* c4-c4-c3-c3-c2-c2-c1-c1 */
"movq %%mm6, %%mm4 \n\t" /* c4-c4-c3-c3-c2-c2-c1-c1 */
"movq %%mm6, %%mm5 \n\t" /* c4-c4-c3-c3-c2-c2-c1-c1 */
"punpcklbw %%mm5, %%mm6 \n\t" /* c2-c2-c2-c2-c1-c1-c1-c1 */
"punpckhbw %%mm5, %%mm4 \n\t" /* c4-c4-c4-c4-c3-c3-c3-c3 */
"movq %%mm6, %%mm3 \n\t" /* c2-c2-c2-c2-c1-c1-c1-c1 */
"punpcklbw %%mm7, %%mm6 \n\t" /* 00-c1-00-c1-00-c1-00-c1 */
"punpckhbw %%mm7, %%mm3 \n\t" /* 00-c2-00-c2-00-c2-00-c2 */
/* multiplication des pixels par les coefficients */
"pmullw %%mm6, %%mm0 \n\t" /* c1*b2-c1*v2-c1*r2-c1*a2 */
"pmullw %%mm3, %%mm1 \n\t" /* c2*b1-c2*v1-c2*r1-c2*a1 */
"paddw %%mm1, %%mm0 \n\t"
/* ...extraction des 2 derniers coefficients */
"movq %%mm4, %%mm5 \n\t" /* c4-c4-c4-c4-c3-c3-c3-c3 */
"punpcklbw %%mm7, %%mm4 \n\t" /* 00-c3-00-c3-00-c3-00-c3 */
"punpckhbw %%mm7, %%mm5 \n\t" /* 00-c4-00-c4-00-c4-00-c4 */
/* ajouter la longueur de ligne a esi */
"addl 8(%%ebp),%1 \n\t"
/* recuperation des 2 derniers pixels */
"movq (%3,%1,4), %%mm1 \n\t" "movq %%mm1, %%mm2 \n\t"
/* depackage des pixels */
"punpcklbw %%mm7, %%mm1 \n\t" "punpckhbw %%mm7, %%mm2 \n\t"
/* multiplication pas les coeffs */
"pmullw %%mm4, %%mm1 \n\t" "pmullw %%mm5, %%mm2 \n\t"
/* ajout des valeurs obtenues ? la valeur finale */
"paddw %%mm1, %%mm0 \n\t" "paddw %%mm2, %%mm0 \n\t"
/* division par 256 = 16+16+16+16, puis repackage du pixel final */
"psrlw $8, %%mm0 \n\t"
"packuswb %%mm7, %%mm0 \n\t" "movd %%mm0,%0 \n\t":"=g" (expix2[loop])
:"r" (pos), "r" (coeffs), "r" (expix1)
);
emms ();
}
}
#define DRAWMETHOD_PLUS_MMX(_out,_backbuf,_col) \
{ \
movd_m2r(_backbuf, mm0); \
paddusb_m2r(_col, mm0); \
movd_r2m(mm0, _out); \
}
#define DRAWMETHOD DRAWMETHOD_PLUS_MMX(*p,*p,col)
void
draw_line_mmx (Pixel * data, int x1, int y1, int x2, int y2, int col,
int screenx, int screeny)
{
int x, y, dx, dy, yy, xx;
Pixel *p;
if ((y1 < 0) || (y2 < 0) || (x1 < 0) || (x2 < 0) || (y1 >= screeny)
|| (y2 >= screeny) || (x1 >= screenx) || (x2 >= screenx))
goto end_of_line;
dx = x2 - x1;
dy = y2 - y1;
if (x1 >= x2) {
int tmp;
tmp = x1;
x1 = x2;
x2 = tmp;
tmp = y1;
y1 = y2;
y2 = tmp;
dx = x2 - x1;
dy = y2 - y1;
}
/* vertical line */
if (dx == 0) {
if (y1 < y2) {
p = &(data[(screenx * y1) + x1]);
for (y = y1; y <= y2; y++) {
DRAWMETHOD;
p += screenx;
}
} else {
p = &(data[(screenx * y2) + x1]);
for (y = y2; y <= y1; y++) {
DRAWMETHOD;
p += screenx;
}
}
goto end_of_line;
}
/* horizontal line */
if (dy == 0) {
if (x1 < x2) {
p = &(data[(screenx * y1) + x1]);
for (x = x1; x <= x2; x++) {
DRAWMETHOD;
p++;
}
goto end_of_line;
} else {
p = &(data[(screenx * y1) + x2]);
for (x = x2; x <= x1; x++) {
DRAWMETHOD;
p++;
}
goto end_of_line;
}
}
/* 1 */
/* \ */
/* \ */
/* 2 */
if (y2 > y1) {
/* steep */
if (dy > dx) {
dx = ((dx << 16) / dy);
x = x1 << 16;
for (y = y1; y <= y2; y++) {
xx = x >> 16;
p = &(data[(screenx * y) + xx]);
DRAWMETHOD;
if (xx < (screenx - 1)) {
p++;
/* DRAWMETHOD; */
}
x += dx;
}
goto end_of_line;
}
/* shallow */
else {
dy = ((dy << 16) / dx);
y = y1 << 16;
for (x = x1; x <= x2; x++) {
yy = y >> 16;
p = &(data[(screenx * yy) + x]);
DRAWMETHOD;
if (yy < (screeny - 1)) {
p += screeny;
/* DRAWMETHOD; */
}
y += dy;
}
}
}
/* 2 */
/* / */
/* / */
/* 1 */
else {
/* steep */
if (-dy > dx) {
dx = ((dx << 16) / -dy);
x = (x1 + 1) << 16;
for (y = y1; y >= y2; y--) {
xx = x >> 16;
p = &(data[(screenx * y) + xx]);
DRAWMETHOD;
if (xx < (screenx - 1)) {
p--;
/* DRAWMETHOD; */
}
x += dx;
}
goto end_of_line;
}
/* shallow */
else {
dy = ((dy << 16) / dx);
y = y1 << 16;
for (x = x1; x <= x2; x++) {
yy = y >> 16;
p = &(data[(screenx * yy) + x]);
DRAWMETHOD;
if (yy < (screeny - 1)) {
p += screeny;
/* DRAWMETHOD; */
}
y += dy;
}
goto end_of_line;
}
}
end_of_line:
emms ();
/* __asm__ __volatile__ ("emms"); */
}
#else
int
mmx_supported (void)
{
return (0);
}
#endif /* HAVE_MMX */