diff options
Diffstat (limited to 'distrib/sdl-1.2.12/src/audio/SDL_mixer_MMX.c')
| -rw-r--r-- | distrib/sdl-1.2.12/src/audio/SDL_mixer_MMX.c | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/distrib/sdl-1.2.12/src/audio/SDL_mixer_MMX.c b/distrib/sdl-1.2.12/src/audio/SDL_mixer_MMX.c deleted file mode 100644 index 9d24ba0..0000000 --- a/distrib/sdl-1.2.12/src/audio/SDL_mixer_MMX.c +++ /dev/null @@ -1,206 +0,0 @@ -/* - 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 - |