Modify framebuffer and NGA framebuffer to read screen size from board model dtb file. Optimise memory usuage of frame buffer
Add example minigui application with hooks to profiler (which writes results to S:\). Modified NGA framebuffer to run its own dfc queue at high priority
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 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"
/*
MMX assembler version of SDL_MixAudio for signed little endian 16 bit samples and signed 8 bit samples
Copyright 2002 Stephane Marchesin (stephane.marchesin@wanadoo.fr)
This code is licensed under the LGPL (see COPYING for details)
Assumes buffer size in bytes is a multiple of 16
Assumes SDL_MIX_MAXVOLUME = 128
*/
/***********************************************
* Mixing for 16 bit signed buffers
***********************************************/
#if defined(__GNUC__) && defined(__i386__) && defined(SDL_ASSEMBLY_ROUTINES)
void SDL_MixAudio_MMX_S16(char* dst,char* src,unsigned int size,int volume)
{
__asm__ __volatile__ (
" movl %3,%%eax\n" /* eax = volume */
" movl %2,%%edx\n" /* edx = size */
" shrl $4,%%edx\n" /* process 16 bytes per iteration = 8 samples */
" jz .endS16\n"
" pxor %%mm0,%%mm0\n"
" movd %%eax,%%mm0\n"
" movq %%mm0,%%mm1\n"
" psllq $16,%%mm0\n"
" por %%mm1,%%mm0\n"
" psllq $16,%%mm0\n"
" por %%mm1,%%mm0\n"
" psllq $16,%%mm0\n"
" por %%mm1,%%mm0\n" /* mm0 = vol|vol|vol|vol */
".align 8\n"
" .mixloopS16:\n"
" movq (%1),%%mm1\n" /* mm1 = a|b|c|d */
" movq %%mm1,%%mm2\n" /* mm2 = a|b|c|d */
" movq 8(%1),%%mm4\n" /* mm4 = e|f|g|h */
/* pré charger le buffer dst dans mm7 */
" movq (%0),%%mm7\n" /* mm7 = dst[0] */
/* multiplier par le volume */
" pmullw %%mm0,%%mm1\n" /* mm1 = l(a*v)|l(b*v)|l(c*v)|l(d*v) */
" pmulhw %%mm0,%%mm2\n" /* mm2 = h(a*v)|h(b*v)|h(c*v)|h(d*v) */
" movq %%mm4,%%mm5\n" /* mm5 = e|f|g|h */
" pmullw %%mm0,%%mm4\n" /* mm4 = l(e*v)|l(f*v)|l(g*v)|l(h*v) */
" pmulhw %%mm0,%%mm5\n" /* mm5 = h(e*v)|h(f*v)|h(g*v)|h(h*v) */
" movq %%mm1,%%mm3\n" /* mm3 = l(a*v)|l(b*v)|l(c*v)|l(d*v) */
" punpckhwd %%mm2,%%mm1\n" /* mm1 = a*v|b*v */
" movq %%mm4,%%mm6\n" /* mm6 = l(e*v)|l(f*v)|l(g*v)|l(h*v) */
" punpcklwd %%mm2,%%mm3\n" /* mm3 = c*v|d*v */
" punpckhwd %%mm5,%%mm4\n" /* mm4 = e*f|f*v */
" punpcklwd %%mm5,%%mm6\n" /* mm6 = g*v|h*v */
/* pré charger le buffer dst dans mm5 */
" movq 8(%0),%%mm5\n" /* mm5 = dst[1] */
/* diviser par 128 */
" psrad $7,%%mm1\n" /* mm1 = a*v/128|b*v/128 , 128 = SDL_MIX_MAXVOLUME */
" add $16,%1\n"
" psrad $7,%%mm3\n" /* mm3 = c*v/128|d*v/128 */
" psrad $7,%%mm4\n" /* mm4 = e*v/128|f*v/128 */
/* mm1 = le sample avec le volume modifié */
" packssdw %%mm1,%%mm3\n" /* mm3 = s(a*v|b*v|c*v|d*v) */
" psrad $7,%%mm6\n" /* mm6= g*v/128|h*v/128 */
" paddsw %%mm7,%%mm3\n" /* mm3 = adjust_volume(src)+dst */
/* mm4 = le sample avec le volume modifié */
" packssdw %%mm4,%%mm6\n" /* mm6 = s(e*v|f*v|g*v|h*v) */
" movq %%mm3,(%0)\n"
" paddsw %%mm5,%%mm6\n" /* mm6 = adjust_volume(src)+dst */
" movq %%mm6,8(%0)\n"
" add $16,%0\n"
" dec %%edx\n"
" jnz .mixloopS16\n"
" emms\n"
".endS16:\n"
:
: "r" (dst), "r"(src),"m"(size),
"m"(volume)
: "eax","edx","memory"
);
}
/*////////////////////////////////////////////// */
/* Mixing for 8 bit signed buffers */
/*////////////////////////////////////////////// */
void SDL_MixAudio_MMX_S8(char* dst,char* src,unsigned int size,int volume)
{
__asm__ __volatile__ (
" movl %3,%%eax\n" /* eax = volume */
" movd %%eax,%%mm0\n"
" movq %%mm0,%%mm1\n"
" psllq $16,%%mm0\n"
" por %%mm1,%%mm0\n"
" psllq $16,%%mm0\n"
" por %%mm1,%%mm0\n"
" psllq $16,%%mm0\n"
" por %%mm1,%%mm0\n"
" movl %2,%%edx\n" /* edx = size */
" shr $3,%%edx\n" /* process 8 bytes per iteration = 8 samples */
" cmp $0,%%edx\n"
" je .endS8\n"
".align 8\n"
" .mixloopS8:\n"
" pxor %%mm2,%%mm2\n" /* mm2 = 0 */
" movq (%1),%%mm1\n" /* mm1 = a|b|c|d|e|f|g|h */
" movq %%mm1,%%mm3\n" /* mm3 = a|b|c|d|e|f|g|h */
/* on va faire le "sign extension" en faisant un cmp avec 0 qui retourne 1 si <0, 0 si >0 */
" pcmpgtb %%mm1,%%mm2\n" /* mm2 = 11111111|00000000|00000000.... */
" punpckhbw %%mm2,%%mm1\n" /* mm1 = 0|a|0|b|0|c|0|d */
" punpcklbw %%mm2,%%mm3\n" /* mm3 = 0|e|0|f|0|g|0|h */
" movq (%0),%%mm2\n" /* mm2 = destination */
" pmullw %%mm0,%%mm1\n" /* mm1 = v*a|v*b|v*c|v*d */
" add $8,%1\n"
" pmullw %%mm0,%%mm3\n" /* mm3 = v*e|v*f|v*g|v*h */
" psraw $7,%%mm1\n" /* mm1 = v*a/128|v*b/128|v*c/128|v*d/128 */
" psraw $7,%%mm3\n" /* mm3 = v*e/128|v*f/128|v*g/128|v*h/128 */
" packsswb %%mm1,%%mm3\n" /* mm1 = v*a/128|v*b/128|v*c/128|v*d/128|v*e/128|v*f/128|v*g/128|v*h/128 */
" paddsb %%mm2,%%mm3\n" /* add to destination buffer */
" movq %%mm3,(%0)\n" /* store back to ram */
" add $8,%0\n"
" dec %%edx\n"
" jnz .mixloopS8\n"
".endS8:\n"
" emms\n"
:
: "r" (dst), "r"(src),"m"(size),
"m"(volume)
: "eax","edx","memory"
);
}
#endif