src/audio/SDL_mixer_MMX_VC.c
branchSDL-1.3
changeset 1662 782fd950bd46
parent 1442 e3242177fe4a
child 1668 4da1ee79c9af
--- a/src/audio/SDL_mixer_MMX_VC.c	Sun May 21 17:27:13 2006 +0000
+++ b/src/audio/SDL_mixer_MMX_VC.c	Sun May 28 13:04:16 2006 +0000
@@ -37,80 +37,63 @@
 // Mixing for 16 bit signed buffers
 ////////////////////////////////////////////////
 
-void SDL_MixAudio_MMX_S16_VC(char* dst,char* src,unsigned int nSize,int volume)
+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
+    __asm {
 
-		#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
-	}
+        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}
 
 }
 
@@ -118,64 +101,49 @@
 // Mixing for 8 bit signed buffers
 ////////////////////////////////////////////////
 
-void SDL_MixAudio_MMX_S8_VC(char* dst,char* src,unsigned int nSize,int volume)
+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
+    _asm {
 
-		#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
-	}
+        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 */
+#endif                          /* SDL_ASSEMBLY_ROUTINES */
+/* vi: set ts=4 sw=4 expandtab: */