diff options
Diffstat (limited to 'distrib/sdl-1.2.12/src/audio/SDL_mixer_MMX_VC.c')
| -rw-r--r-- | distrib/sdl-1.2.12/src/audio/SDL_mixer_MMX_VC.c | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/distrib/sdl-1.2.12/src/audio/SDL_mixer_MMX_VC.c b/distrib/sdl-1.2.12/src/audio/SDL_mixer_MMX_VC.c deleted file mode 100644 index 89b646a..0000000 --- a/distrib/sdl-1.2.12/src/audio/SDL_mixer_MMX_VC.c +++ /dev/null @@ -1,181 +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" - -#include "SDL_mixer_MMX_VC.h" - -#if ((defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)) && defined(SDL_ASSEMBLY_ROUTINES) -// 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) -// Converted to Intel ASM notation by Cth -// 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 -//////////////////////////////////////////////// - -void SDL_MixAudio_MMX_S16_VC(char* dst,char* src,unsigned int nSize,int volume) -{ - __asm - { - - push edi - push esi - push ebx - - mov edi, dst // edi = dst - mov esi, src // esi = src - mov eax, volume // eax = volume - mov ebx, nSize // ebx = size - shr ebx, 4 // process 16 bytes per iteration = 8 samples - jz endS16 - - pxor mm0, mm0 - movd mm0, eax //%%eax,%%mm0 - movq mm1, mm0 //%%mm0,%%mm1 - psllq mm0, 16 //$16,%%mm0 - por mm0, mm1 //%%mm1,%%mm0 - psllq mm0, 16 //$16,%%mm0 - por mm0, mm1 //%%mm1,%%mm0 - psllq mm0, 16 //$16,%%mm0 - por mm0, mm1 //%%mm1,%%mm0 // mm0 = vol|vol|vol|vol - - #ifndef __WATCOMC__ - align 16 - #endif -mixloopS16: - movq mm1, [esi] //(%%esi),%%mm1\n" // mm1 = a|b|c|d - movq mm2, mm1 //%%mm1,%%mm2\n" // mm2 = a|b|c|d - movq mm4, [esi + 8] //8(%%esi),%%mm4\n" // mm4 = e|f|g|h - // pre charger le buffer dst dans mm7 - movq mm7, [edi] //(%%edi),%%mm7\n" // mm7 = dst[0]" - // multiplier par le volume - pmullw mm1, mm0 //%%mm0,%%mm1\n" // mm1 = l(a*v)|l(b*v)|l(c*v)|l(d*v) - pmulhw mm2, mm0 //%%mm0,%%mm2\n" // mm2 = h(a*v)|h(b*v)|h(c*v)|h(d*v) - movq mm5, mm4 //%%mm4,%%mm5\n" // mm5 = e|f|g|h - pmullw mm4, mm0 //%%mm0,%%mm4\n" // mm4 = l(e*v)|l(f*v)|l(g*v)|l(h*v) - pmulhw mm5, mm0 //%%mm0,%%mm5\n" // mm5 = h(e*v)|h(f*v)|h(g*v)|h(h*v) - movq mm3, mm1 //%%mm1,%%mm3\n" // mm3 = l(a*v)|l(b*v)|l(c*v)|l(d*v) - punpckhwd mm1, mm2 //%%mm2,%%mm1\n" // mm1 = a*v|b*v - movq mm6, mm4 //%%mm4,%%mm6\n" // mm6 = l(e*v)|l(f*v)|l(g*v)|l(h*v) - punpcklwd mm3, mm2 //%%mm2,%%mm3\n" // mm3 = c*v|d*v - punpckhwd mm4, mm5 //%%mm5,%%mm4\n" // mm4 = e*f|f*v - punpcklwd mm6, mm5 //%%mm5,%%mm6\n" // mm6 = g*v|h*v - // pre charger le buffer dst dans mm5 - movq mm5, [edi + 8] //8(%%edi),%%mm5\n" // mm5 = dst[1] - // diviser par 128 - psrad mm1, 7 //$7,%%mm1\n" // mm1 = a*v/128|b*v/128 , 128 = SDL_MIX_MAXVOLUME - add esi, 16 //$16,%%esi\n" - psrad mm3, 7 //$7,%%mm3\n" // mm3 = c*v/128|d*v/128 - psrad mm4, 7 //$7,%%mm4\n" // mm4 = e*v/128|f*v/128 - // mm1 = le sample avec le volume modifie - packssdw mm3, mm1 //%%mm1,%%mm3\n" // mm3 = s(a*v|b*v|c*v|d*v) - psrad mm6, 7 //$7,%%mm6\n" // mm6= g*v/128|h*v/128 - paddsw mm3, mm7 //%%mm7,%%mm3\n" // mm3 = adjust_volume(src)+dst - // mm4 = le sample avec le volume modifie - packssdw mm6, mm4 //%%mm4,%%mm6\n" // mm6 = s(e*v|f*v|g*v|h*v) - movq [edi], mm3 //%%mm3,(%%edi)\n" - paddsw mm6, mm5 //%%mm5,%%mm6\n" // mm6 = adjust_volume(src)+dst - movq [edi + 8], mm6 //%%mm6,8(%%edi)\n" - add edi, 16 //$16,%%edi\n" - dec ebx //%%ebx\n" - jnz mixloopS16 - -ends16: - emms - - pop ebx - pop esi - pop edi - } - -} - -//////////////////////////////////////////////// -// Mixing for 8 bit signed buffers -//////////////////////////////////////////////// - -void SDL_MixAudio_MMX_S8_VC(char* dst,char* src,unsigned int nSize,int volume) -{ - _asm - { - - push edi - push esi - push ebx - - mov edi, dst //movl %0,%%edi // edi = dst - mov esi, src //%1,%%esi // esi = src - mov eax, volume //%3,%%eax // eax = volume - - movd mm0, eax //%%eax,%%mm0 - movq mm1, mm0 //%%mm0,%%mm1 - psllq mm0, 16 //$16,%%mm0 - por mm0, mm1 //%%mm1,%%mm0 - psllq mm0, 16 //$16,%%mm0 - por mm0, mm1 //%%mm1,%%mm0 - psllq mm0, 16 //$16,%%mm0 - por mm0, mm1 //%%mm1,%%mm0 - - mov ebx, nSize //%2,%%ebx // ebx = size - shr ebx, 3 //$3,%%ebx // process 8 bytes per iteration = 8 samples - cmp ebx, 0 //$0,%%ebx - je endS8 - - #ifndef __WATCOMC__ - align 16 - #endif -mixloopS8: - pxor mm2, mm2 //%%mm2,%%mm2 // mm2 = 0 - movq mm1, [esi] //(%%esi),%%mm1 // mm1 = a|b|c|d|e|f|g|h - movq mm3, mm1 //%%mm1,%%mm3 // 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 mm2, mm1 //%%mm1,%%mm2 // mm2 = 11111111|00000000|00000000.... - punpckhbw mm1, mm2 //%%mm2,%%mm1 // mm1 = 0|a|0|b|0|c|0|d - punpcklbw mm3, mm2 //%%mm2,%%mm3 // mm3 = 0|e|0|f|0|g|0|h - movq mm2, [edi] //(%%edi),%%mm2 // mm2 = destination - pmullw mm1, mm0 //%%mm0,%%mm1 // mm1 = v*a|v*b|v*c|v*d - add esi, 8 //$8,%%esi - pmullw mm3, mm0 //%%mm0,%%mm3 // mm3 = v*e|v*f|v*g|v*h - psraw mm1, 7 //$7,%%mm1 // mm1 = v*a/128|v*b/128|v*c/128|v*d/128 - psraw mm3, 7 //$7,%%mm3 // mm3 = v*e/128|v*f/128|v*g/128|v*h/128 - packsswb mm3, mm1 //%%mm1,%%mm3 // 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 mm3, mm2 //%%mm2,%%mm3 // add to destination buffer - movq [edi], mm3 //%%mm3,(%%edi) // store back to ram - add edi, 8 //$8,%%edi - dec ebx //%%ebx - jnz mixloopS8 - -endS8: - emms - - pop ebx - pop esi - pop edi - } -} - -#endif /* SDL_ASSEMBLY_ROUTINES */ |