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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2011 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#if (__GNUC__ > 2) && defined(__i386__) && __OPTIMIZE__ && SDL_ASSEMBLY_ROUTINES
#include "SDL_stdinc.h"
#include "mmx.h"
/* *INDENT-OFF* */
static mmx_t MMX_0080w = { .ud = {0x00800080, 0x00800080} };
static mmx_t MMX_00FFw = { .ud = {0x00ff00ff, 0x00ff00ff} };
static mmx_t MMX_FF00w = { .ud = {0xff00ff00, 0xff00ff00} };
static mmx_t MMX_Ycoeff = { .uw = {0x004a, 0x004a, 0x004a, 0x004a} };
static mmx_t MMX_UbluRGB = { .uw = {0x0072, 0x0072, 0x0072, 0x0072} };
static mmx_t MMX_VredRGB = { .uw = {0x0059, 0x0059, 0x0059, 0x0059} };
static mmx_t MMX_UgrnRGB = { .uw = {0xffea, 0xffea, 0xffea, 0xffea} };
static mmx_t MMX_VgrnRGB = { .uw = {0xffd2, 0xffd2, 0xffd2, 0xffd2} };
static mmx_t MMX_Ublu5x5 = { .uw = {0x0081, 0x0081, 0x0081, 0x0081} };
static mmx_t MMX_Vred5x5 = { .uw = {0x0066, 0x0066, 0x0066, 0x0066} };
static mmx_t MMX_Ugrn565 = { .uw = {0xffe8, 0xffe8, 0xffe8, 0xffe8} };
static mmx_t MMX_Vgrn565 = { .uw = {0xffcd, 0xffcd, 0xffcd, 0xffcd} };
static mmx_t MMX_red565 = { .uw = {0xf800, 0xf800, 0xf800, 0xf800} };
static mmx_t MMX_grn565 = { .uw = {0x07e0, 0x07e0, 0x07e0, 0x07e0} };
/**
This MMX assembler is my first assembler/MMX program ever.
Thus it maybe buggy.
Send patches to:
mvogt@rhrk.uni-kl.de
After it worked fine I have "obfuscated" the code a bit to have
more parallism in the MMX units. This means I moved
initilisation around and delayed other instruction.
Performance measurement did not show that this brought any advantage
but in theory it _should_ be faster this way.
The overall performanve gain to the C based dither was 30%-40%.
The MMX routine calculates 256bit=8RGB values in each cycle
(4 for row1 & 4 for row2)
The red/green/blue.. coefficents are taken from the mpeg_play
player. They look nice, but I dont know if you can have
better values, to avoid integer rounding errors.
IMPORTANT:
==========
It is a requirement that the cr/cb/lum are 8 byte aligned and
the out are 16byte aligned or you will/may get segfaults
*/
void ColorRGBDitherYV12MMX1X( int *colortab, Uint32 *rgb_2_pix,
unsigned char *lum, unsigned char *cr,
unsigned char *cb, unsigned char *out,
int rows, int cols, int mod )
{
Uint32 *row1;
Uint32 *row2;
unsigned char* y = lum +cols*rows; // Pointer to the end
int x = 0;
row1 = (Uint32 *)out; // 32 bit target
row2 = (Uint32 *)out+cols+mod; // start of second row
mod = (mod+cols+mod)*4; // increment for row1 in byte
__asm__ __volatile__ (
// tap dance to workaround the inability to use %%ebx at will...
// move one thing to the stack...
"pushl $0\n" // save a slot on the stack.
"pushl %%ebx\n" // save %%ebx.
"movl %0, %%ebx\n" // put the thing in ebx.
"movl %%ebx,4(%%esp)\n" // put the thing in the stack slot.
"popl %%ebx\n" // get back %%ebx (the PIC register).
".align 8\n"
"1:\n"
// create Cr (result in mm1)
"pushl %%ebx\n"
"movl 4(%%esp),%%ebx\n"
"movd (%%ebx),%%mm1\n" // 0 0 0 0 v3 v2 v1 v0
"popl %%ebx\n"
"pxor %%mm7,%%mm7\n" // 00 00 00 00 00 00 00 00
"movd (%2), %%mm2\n" // 0 0 0 0 l3 l2 l1 l0
"punpcklbw %%mm7,%%mm1\n" // 0 v3 0 v2 00 v1 00 v0
"punpckldq %%mm1,%%mm1\n" // 00 v1 00 v0 00 v1 00 v0
"psubw %9,%%mm1\n" // mm1-128:r1 r1 r0 r0 r1 r1 r0 r0
// create Cr_g (result in mm0)
"movq %%mm1,%%mm0\n" // r1 r1 r0 r0 r1 r1 r0 r0
"pmullw %10,%%mm0\n" // red*-46dec=0.7136*64
"pmullw %11,%%mm1\n" // red*89dec=1.4013*64
"psraw $6, %%mm0\n" // red=red/64
"psraw $6, %%mm1\n" // red=red/64
// create L1 L2 (result in mm2,mm4)
// L2=lum+cols
"movq (%2,%4),%%mm3\n" // 0 0 0 0 L3 L2 L1 L0
"punpckldq %%mm3,%%mm2\n" // L3 L2 L1 L0 l3 l2 l1 l0
"movq %%mm2,%%mm4\n" // L3 L2 L1 L0 l3 l2 l1 l0
"pand %12,%%mm2\n" // L3 0 L1 0 l3 0 l1 0
"pand %13,%%mm4\n" // 0 L2 0 L0 0 l2 0 l0
"psrlw $8,%%mm2\n" // 0 L3 0 L1 0 l3 0 l1
// create R (result in mm6)
"movq %%mm2,%%mm5\n" // 0 L3 0 L1 0 l3 0 l1
"movq %%mm4,%%mm6\n" // 0 L2 0 L0 0 l2 0 l0
"paddsw %%mm1, %%mm5\n" // lum1+red:x R3 x R1 x r3 x r1
"paddsw %%mm1, %%mm6\n" // lum1+red:x R2 x R0 x r2 x r0
"packuswb %%mm5,%%mm5\n" // R3 R1 r3 r1 R3 R1 r3 r1
"packuswb %%mm6,%%mm6\n" // R2 R0 r2 r0 R2 R0 r2 r0
"pxor %%mm7,%%mm7\n" // 00 00 00 00 00 00 00 00
"punpcklbw %%mm5,%%mm6\n" // R3 R2 R1 R0 r3 r2 r1 r0
// create Cb (result in mm1)
"movd (%1), %%mm1\n" // 0 0 0 0 u3 u2 u1 u0
"punpcklbw %%mm7,%%mm1\n" // 0 u3 0 u2 00 u1 00 u0
"punpckldq %%mm1,%%mm1\n" // 00 u1 00 u0 00 u1 00 u0
"psubw %9,%%mm1\n" // mm1-128:u1 u1 u0 u0 u1 u1 u0 u0
// create Cb_g (result in mm5)
"movq %%mm1,%%mm5\n" // u1 u1 u0 u0 u1 u1 u0 u0
"pmullw %14,%%mm5\n" // blue*-109dec=1.7129*64
"pmullw %15,%%mm1\n" // blue*114dec=1.78125*64
"psraw $6, %%mm5\n" // blue=red/64
"psraw $6, %%mm1\n" // blue=blue/64
// create G (result in mm7)
"movq %%mm2,%%mm3\n" // 0 L3 0 L1 0 l3 0 l1
"movq %%mm4,%%mm7\n" // 0 L2 0 L0 0 l2 0 l1
"paddsw %%mm5, %%mm3\n" // lum1+Cb_g:x G3t x G1t x g3t x g1t
"paddsw %%mm5, %%mm7\n" // lum1+Cb_g:x G2t x G0t x g2t x g0t
"paddsw %%mm0, %%mm3\n" // lum1+Cr_g:x G3 x G1 x g3 x g1
"paddsw %%mm0, %%mm7\n" // lum1+blue:x G2 x G0 x g2 x g0
"packuswb %%mm3,%%mm3\n" // G3 G1 g3 g1 G3 G1 g3 g1
"packuswb %%mm7,%%mm7\n" // G2 G0 g2 g0 G2 G0 g2 g0
"punpcklbw %%mm3,%%mm7\n" // G3 G2 G1 G0 g3 g2 g1 g0
// create B (result in mm5)
"movq %%mm2,%%mm3\n" // 0 L3 0 L1 0 l3 0 l1
"movq %%mm4,%%mm5\n" // 0 L2 0 L0 0 l2 0 l1
"paddsw %%mm1, %%mm3\n" // lum1+blue:x B3 x B1 x b3 x b1
"paddsw %%mm1, %%mm5\n" // lum1+blue:x B2 x B0 x b2 x b0
"packuswb %%mm3,%%mm3\n" // B3 B1 b3 b1 B3 B1 b3 b1
"packuswb %%mm5,%%mm5\n" // B2 B0 b2 b0 B2 B0 b2 b0
"punpcklbw %%mm3,%%mm5\n" // B3 B2 B1 B0 b3 b2 b1 b0
// fill destination row1 (needed are mm6=Rr,mm7=Gg,mm5=Bb)
"pxor %%mm2,%%mm2\n" // 0 0 0 0 0 0 0 0
"pxor %%mm4,%%mm4\n" // 0 0 0 0 0 0 0 0
"movq %%mm6,%%mm1\n" // R3 R2 R1 R0 r3 r2 r1 r0
"movq %%mm5,%%mm3\n" // B3 B2 B1 B0 b3 b2 b1 b0
// process lower lum
"punpcklbw %%mm4,%%mm1\n" // 0 r3 0 r2 0 r1 0 r0
"punpcklbw %%mm4,%%mm3\n" // 0 b3 0 b2 0 b1 0 b0
"movq %%mm1,%%mm2\n" // 0 r3 0 r2 0 r1 0 r0
"movq %%mm3,%%mm0\n" // 0 b3 0 b2 0 b1 0 b0
"punpcklwd %%mm1,%%mm3\n" // 0 r1 0 b1 0 r0 0 b0
"punpckhwd %%mm2,%%mm0\n" // 0 r3 0 b3 0 r2 0 b2
"pxor %%mm2,%%mm2\n" // 0 0 0 0 0 0 0 0
"movq %%mm7,%%mm1\n" // G3 G2 G1 G0 g3 g2 g1 g0
"punpcklbw %%mm1,%%mm2\n" // g3 0 g2 0 g1 0 g0 0
"punpcklwd %%mm4,%%mm2\n" // 0 0 g1 0 0 0 g0 0
"por %%mm3, %%mm2\n" // 0 r1 g1 b1 0 r0 g0 b0
"movq %%mm2,(%3)\n" // wrote out ! row1
"pxor %%mm2,%%mm2\n" // 0 0 0 0 0 0 0 0
"punpcklbw %%mm1,%%mm4\n" // g3 0 g2 0 g1 0 g0 0
"punpckhwd %%mm2,%%mm4\n" // 0 0 g3 0 0 0 g2 0
"por %%mm0, %%mm4\n" // 0 r3 g3 b3 0 r2 g2 b2
"movq %%mm4,8(%3)\n" // wrote out ! row1
// fill destination row2 (needed are mm6=Rr,mm7=Gg,mm5=Bb)
// this can be done "destructive"
"pxor %%mm2,%%mm2\n" // 0 0 0 0 0 0 0 0
"punpckhbw %%mm2,%%mm6\n" // 0 R3 0 R2 0 R1 0 R0
"punpckhbw %%mm1,%%mm5\n" // G3 B3 G2 B2 G1 B1 G0 B0
"movq %%mm5,%%mm1\n" // G3 B3 G2 B2 G1 B1 G0 B0
"punpcklwd %%mm6,%%mm1\n" // 0 R1 G1 B1 0 R0 G0 B0
"movq %%mm1,(%5)\n" // wrote out ! row2
"punpckhwd %%mm6,%%mm5\n" // 0 R3 G3 B3 0 R2 G2 B2
"movq %%mm5,8(%5)\n" // wrote out ! row2
"addl $4,%2\n" // lum+4
"leal 16(%3),%3\n" // row1+16
"leal 16(%5),%5\n" // row2+16
"addl $2,(%%esp)\n" // cr+2
"addl $2,%1\n" // cb+2
"addl $4,%6\n" // x+4
"cmpl %4,%6\n"
"jl 1b\n"
"addl %4,%2\n" // lum += cols
"addl %8,%3\n" // row1+= mod
"addl %8,%5\n" // row2+= mod
"movl $0,%6\n" // x=0
"cmpl %7,%2\n"
"jl 1b\n"
"addl $4,%%esp\n" // get rid of the stack slot we reserved.
"emms\n" // reset MMX registers.
:
: "m" (cr), "r"(cb),"r"(lum),
"r"(row1),"r"(cols),"r"(row2),"m"(x),"m"(y),"m"(mod),
"m"(MMX_0080w),"m"(MMX_VgrnRGB),"m"(MMX_VredRGB),
"m"(MMX_FF00w),"m"(MMX_00FFw),"m"(MMX_UgrnRGB),
"m"(MMX_UbluRGB)
);
}
void Color565DitherYV12MMX1X( int *colortab, Uint32 *rgb_2_pix,
unsigned char *lum, unsigned char *cr,
unsigned char *cb, unsigned char *out,
int rows, int cols, int mod )
{
Uint16 *row1;
Uint16 *row2;
unsigned char* y = lum +cols*rows; /* Pointer to the end */
int x = 0;
row1 = (Uint16 *)out; /* 16 bit target */
row2 = (Uint16 *)out+cols+mod; /* start of second row */
mod = (mod+cols+mod)*2; /* increment for row1 in byte */
__asm__ __volatile__(
// tap dance to workaround the inability to use %%ebx at will...
// move one thing to the stack...
"pushl $0\n" // save a slot on the stack.
"pushl %%ebx\n" // save %%ebx.
"movl %0, %%ebx\n" // put the thing in ebx.
"movl %%ebx, 4(%%esp)\n" // put the thing in the stack slot.
"popl %%ebx\n" // get back %%ebx (the PIC register).
".align 8\n"
"1:\n"
"movd (%1), %%mm0\n" // 4 Cb 0 0 0 0 u3 u2 u1 u0
"pxor %%mm7, %%mm7\n"
"pushl %%ebx\n"
"movl 4(%%esp), %%ebx\n"
"movd (%%ebx), %%mm1\n" // 4 Cr 0 0 0 0 v3 v2 v1 v0
"popl %%ebx\n"
"punpcklbw %%mm7, %%mm0\n" // 4 W cb 0 u3 0 u2 0 u1 0 u0
"punpcklbw %%mm7, %%mm1\n" // 4 W cr 0 v3 0 v2 0 v1 0 v0
"psubw %9, %%mm0\n"
"psubw %9, %%mm1\n"
"movq %%mm0, %%mm2\n" // Cb 0 u3 0 u2 0 u1 0 u0
"movq %%mm1, %%mm3\n" // Cr
"pmullw %10, %%mm2\n" // Cb2green 0 R3 0 R2 0 R1 0 R0
"movq (%2), %%mm6\n" // L1 l7 L6 L5 L4 L3 L2 L1 L0
"pmullw %11, %%mm0\n" // Cb2blue
"pand %12, %%mm6\n" // L1 00 L6 00 L4 00 L2 00 L0
"pmullw %13, %%mm3\n" // Cr2green
"movq (%2), %%mm7\n" // L2
"pmullw %14, %%mm1\n" // Cr2red
"psrlw $8, %%mm7\n" // L2 00 L7 00 L5 00 L3 00 L1
"pmullw %15, %%mm6\n" // lum1
"paddw %%mm3, %%mm2\n" // Cb2green + Cr2green == green
"pmullw %15, %%mm7\n" // lum2
"movq %%mm6, %%mm4\n" // lum1
"paddw %%mm0, %%mm6\n" // lum1 +blue 00 B6 00 B4 00 B2 00 B0
"movq %%mm4, %%mm5\n" // lum1
"paddw %%mm1, %%mm4\n" // lum1 +red 00 R6 00 R4 00 R2 00 R0
"paddw %%mm2, %%mm5\n" // lum1 +green 00 G6 00 G4 00 G2 00 G0
"psraw $6, %%mm4\n" // R1 0 .. 64
"movq %%mm7, %%mm3\n" // lum2 00 L7 00 L5 00 L3 00 L1
"psraw $6, %%mm5\n" // G1 - .. +
"paddw %%mm0, %%mm7\n" // Lum2 +blue 00 B7 00 B5 00 B3 00 B1
"psraw $6, %%mm6\n" // B1 0 .. 64
"packuswb %%mm4, %%mm4\n" // R1 R1
"packuswb %%mm5, %%mm5\n" // G1 G1
"packuswb %%mm6, %%mm6\n" // B1 B1
"punpcklbw %%mm4, %%mm4\n"
"punpcklbw %%mm5, %%mm5\n"
"pand %16, %%mm4\n"
"psllw $3, %%mm5\n" // GREEN 1
"punpcklbw %%mm6, %%mm6\n"
"pand %17, %%mm5\n"
"pand %16, %%mm6\n"
"por %%mm5, %%mm4\n" //
"psrlw $11, %%mm6\n" // BLUE 1
"movq %%mm3, %%mm5\n" // lum2
"paddw %%mm1, %%mm3\n" // lum2 +red 00 R7 00 R5 00 R3 00 R1
"paddw %%mm2, %%mm5\n" // lum2 +green 00 G7 00 G5 00 G3 00 G1
"psraw $6, %%mm3\n" // R2
"por %%mm6, %%mm4\n" // MM4
"psraw $6, %%mm5\n" // G2
"movq (%2, %4), %%mm6\n" // L3 load lum2
"psraw $6, %%mm7\n"
"packuswb %%mm3, %%mm3\n"
"packuswb %%mm5, %%mm5\n"
"packuswb %%mm7, %%mm7\n"
"pand %12, %%mm6\n" // L3
"punpcklbw %%mm3, %%mm3\n"
"punpcklbw %%mm5, %%mm5\n"
"pmullw %15, %%mm6\n" // lum3
"punpcklbw %%mm7, %%mm7\n"
"psllw $3, %%mm5\n" // GREEN 2
"pand %16, %%mm7\n"
"pand %16, %%mm3\n"
"psrlw $11, %%mm7\n" // BLUE 2
"pand %17, %%mm5\n"
"por %%mm7, %%mm3\n"
"movq (%2,%4), %%mm7\n" // L4 load lum2
"por %%mm5, %%mm3\n" //
"psrlw $8, %%mm7\n" // L4
"movq %%mm4, %%mm5\n"
"punpcklwd %%mm3, %%mm4\n"
"pmullw %15, %%mm7\n" // lum4
"punpckhwd %%mm3, %%mm5\n"
"movq %%mm4, (%3)\n" // write row1
"movq %%mm5, 8(%3)\n" // write row1
"movq %%mm6, %%mm4\n" // Lum3
"paddw %%mm0, %%mm6\n" // Lum3 +blue
"movq %%mm4, %%mm5\n" // Lum3
"paddw %%mm1, %%mm4\n" // Lum3 +red
"paddw %%mm2, %%mm5\n" // Lum3 +green
"psraw $6, %%mm4\n"
"movq %%mm7, %%mm3\n" // Lum4
"psraw $6, %%mm5\n"
"paddw %%mm0, %%mm7\n" // Lum4 +blue
"psraw $6, %%mm6\n" // Lum3 +blue
"movq %%mm3, %%mm0\n" // Lum4
"packuswb %%mm4, %%mm4\n"
"paddw %%mm1, %%mm3\n" // Lum4 +red
"packuswb %%mm5, %%mm5\n"
"paddw %%mm2, %%mm0\n" // Lum4 +green
"packuswb %%mm6, %%mm6\n"
"punpcklbw %%mm4, %%mm4\n"
"punpcklbw %%mm5, %%mm5\n"
"punpcklbw %%mm6, %%mm6\n"
"psllw $3, %%mm5\n" // GREEN 3
"pand %16, %%mm4\n"
"psraw $6, %%mm3\n" // psr 6
"psraw $6, %%mm0\n"
"pand %16, %%mm6\n" // BLUE
"pand %17, %%mm5\n"
"psrlw $11, %%mm6\n" // BLUE 3
"por %%mm5, %%mm4\n"
"psraw $6, %%mm7\n"
"por %%mm6, %%mm4\n"
"packuswb %%mm3, %%mm3\n"
"packuswb %%mm0, %%mm0\n"
"packuswb %%mm7, %%mm7\n"
"punpcklbw %%mm3, %%mm3\n"
"punpcklbw %%mm0, %%mm0\n"
"punpcklbw %%mm7, %%mm7\n"
"pand %16, %%mm3\n"
"pand %16, %%mm7\n" // BLUE
"psllw $3, %%mm0\n" // GREEN 4
"psrlw $11, %%mm7\n"
"pand %17, %%mm0\n"
"por %%mm7, %%mm3\n"
"por %%mm0, %%mm3\n"
"movq %%mm4, %%mm5\n"
"punpcklwd %%mm3, %%mm4\n"
"punpckhwd %%mm3, %%mm5\n"
"movq %%mm4, (%5)\n"
"movq %%mm5, 8(%5)\n"
"addl $8, %6\n"
"addl $8, %2\n"
"addl $4, (%%esp)\n"
"addl $4, %1\n"
"cmpl %4, %6\n"
"leal 16(%3), %3\n"
"leal 16(%5),%5\n" // row2+16
"jl 1b\n"
"addl %4, %2\n" // lum += cols
"addl %8, %3\n" // row1+= mod
"addl %8, %5\n" // row2+= mod
"movl $0, %6\n" // x=0
"cmpl %7, %2\n"
"jl 1b\n"
"addl $4, %%esp\n" // get rid of the stack slot we reserved.
"emms\n"
:
: "m" (cr), "r"(cb),"r"(lum),
"r"(row1),"r"(cols),"r"(row2),"m"(x),"m"(y),"m"(mod),
"m"(MMX_0080w),"m"(MMX_Ugrn565),"m"(MMX_Ublu5x5),
"m"(MMX_00FFw),"m"(MMX_Vgrn565),"m"(MMX_Vred5x5),
"m"(MMX_Ycoeff),"m"(MMX_red565),"m"(MMX_grn565)
);
}
/* *INDENT-ON* */
#endif /* GCC3 i386 inline assembly */
/* vi: set ts=4 sw=4 expandtab: */