diff src/audio/SDL_mixer_MMX.c @ 1662:782fd950bd46 SDL-1.3

Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. WARNING: None of the video drivers have been updated for the new API yet! The API is still under design and very fluid. The code is now run through a consistent indent format: indent -i4 -nut -nsc -br -ce The headers are being converted to automatically generate doxygen documentation.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 28 May 2006 13:04:16 +0000
parents 97d0966f4bf7
children 4da1ee79c9af
line wrap: on
line diff
--- a/src/audio/SDL_mixer_MMX.c	Sun May 21 17:27:13 2006 +0000
+++ b/src/audio/SDL_mixer_MMX.c	Sun May 28 13:04:16 2006 +0000
@@ -36,100 +36,50 @@
 ***********************************************/
 
 #if defined(__GNUC__) && defined(__i386__) && defined(SDL_ASSEMBLY_ROUTINES)
-void SDL_MixAudio_MMX_S16(char* dst,char* src,unsigned int size,int volume)
+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"
-	 );
+    __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");
 }
 
 
@@ -138,69 +88,33 @@
 /* Mixing for 8 bit signed buffers */
 /*////////////////////////////////////////////// */
 
-void SDL_MixAudio_MMX_S8(char* dst,char* src,unsigned int size,int volume)
+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"
-	 );
+    __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
-
+/* vi: set ts=4 sw=4 expandtab: */