src/audio/SDL_mixer_MMX.c
changeset 1612 97d0966f4bf7
parent 1411 efb34e597d21
child 1662 782fd950bd46
child 1895 c121d94672cb
child 4159 a1b03ba2fcd0
--- a/src/audio/SDL_mixer_MMX.c	Fri Mar 24 05:11:51 2006 +0000
+++ b/src/audio/SDL_mixer_MMX.c	Fri Mar 24 06:10:24 2006 +0000
@@ -40,11 +40,11 @@
 {
     __asm__ __volatile__ (
 
-"	movl %3,%%eax\n"	// eax = volume
+"	movl %3,%%eax\n"	/* eax = volume */
 
-"	movl %2,%%edx\n"	// edx = size
+"	movl %2,%%edx\n"	/* edx = size */
 
-"	shrl $4,%%edx\n"	// process 16 bytes per iteration = 8 samples
+"	shrl $4,%%edx\n"	/* process 16 bytes per iteration = 8 samples */
 
 "	jz .endS16\n"
 
@@ -57,62 +57,62 @@
 "	psllq $16,%%mm0\n"
 "	por %%mm1,%%mm0\n"
 "	psllq $16,%%mm0\n"
-"	por %%mm1,%%mm0\n"		// mm0 = vol|vol|vol|vol
+"	por %%mm1,%%mm0\n"		/* mm0 = vol|vol|vol|vol */
 
 ".align 8\n"
 "	.mixloopS16:\n"
 
-"	movq (%1),%%mm1\n" // mm1 = a|b|c|d
+"	movq (%1),%%mm1\n" /* mm1 = a|b|c|d */
 
-"	movq %%mm1,%%mm2\n" // mm2 = a|b|c|d
+"	movq %%mm1,%%mm2\n" /* mm2 = a|b|c|d */
 
-"	movq 8(%1),%%mm4\n" // mm4 = e|f|g|h
+"	movq 8(%1),%%mm4\n" /* mm4 = e|f|g|h */
 
-	// pré charger le buffer dst dans mm7
-"	movq (%0),%%mm7\n" // mm7 = dst[0]"
+	/* 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)
+	/* 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
+"	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)
+"	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)
+"	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
+"	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
+"	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
+"	punpckhwd %%mm5,%%mm4\n" /* mm4 = e*f|f*v */
 
-"	punpcklwd %%mm5,%%mm6\n" // mm6 = g*v|h*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]
+	/* 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
+	/* 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,%%mm3\n" /* mm3 = c*v/128|d*v/128 */
 
-"	psrad $7,%%mm4\n" // mm4 = e*v/128|f*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)
+	/* 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
+"	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)
+	/* 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
+"	paddsw %%mm5,%%mm6\n" /* mm6 = adjust_volume(src)+dst */
 
 "	movq %%mm6,8(%0)\n"
 
@@ -134,15 +134,15 @@
 
 
 
-////////////////////////////////////////////////
-// Mixing for 8 bit signed buffers
-////////////////////////////////////////////////
+/*////////////////////////////////////////////// */
+/* 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
+"	movl %3,%%eax\n"	/* eax = volume */
 
 "	movd %%eax,%%mm0\n"
 "	movq %%mm0,%%mm1\n"
@@ -153,8 +153,8 @@
 "	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
+"	movl %2,%%edx\n"	/* edx = size */
+"	shr $3,%%edx\n"	/* process 8 bytes per iteration = 8 samples */
 
 "	cmp $0,%%edx\n"
 "	je .endS8\n"
@@ -162,32 +162,32 @@
 ".align 8\n"
 "	.mixloopS8:\n"
 
-"	pxor %%mm2,%%mm2\n"		// mm2 = 0
-"	movq (%1),%%mm1\n"	// mm1 = a|b|c|d|e|f|g|h
+"	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
+"	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....
+	/* 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
+"	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
+"	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
+"	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 
+"	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
+"	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
+"	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
+"	paddsb %%mm2,%%mm3\n"	/* add to destination buffer */
 
-"	movq %%mm3,(%0)\n"	// store back to ram
+"	movq %%mm3,(%0)\n"	/* store back to ram */
 "	add $8,%0\n"
 
 "	dec %%edx\n"