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godot/thirdparty/libtheora/x86/mmxfdct.c

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/********************************************************************
* *
* THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE Theora SOURCE CODE IS COPYRIGHT (C) 1999-2006 *
* by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************/
/*MMX fDCT implementation for x86_32*/
/*$Id: fdct_ses2.c 14579 2008-03-12 06:42:40Z xiphmont $*/
#include "x86enc.h"
#include "x86zigzag.h"
#if defined(OC_X86_ASM)
# define OC_FDCT_STAGE1_8x4 \
"#OC_FDCT_STAGE1_8x4\n\t" \
/*Stage 1:*/ \
/*mm0=t7'=t0-t7*/ \
"psubw %%mm7,%%mm0\n\t" \
"paddw %%mm7,%%mm7\n\t" \
/*mm1=t6'=t1-t6*/ \
"psubw %%mm6,%%mm1\n\t" \
"paddw %%mm6,%%mm6\n\t" \
/*mm2=t5'=t2-t5*/ \
"psubw %%mm5,%%mm2\n\t" \
"paddw %%mm5,%%mm5\n\t" \
/*mm3=t4'=t3-t4*/ \
"psubw %%mm4,%%mm3\n\t" \
"paddw %%mm4,%%mm4\n\t" \
/*mm7=t0'=t0+t7*/ \
"paddw %%mm0,%%mm7\n\t" \
/*mm6=t1'=t1+t6*/ \
"paddw %%mm1,%%mm6\n\t" \
/*mm5=t2'=t2+t5*/ \
"paddw %%mm2,%%mm5\n\t" \
/*mm4=t3'=t3+t4*/ \
"paddw %%mm3,%%mm4\n\t" \
# define OC_FDCT8x4(_r0,_r1,_r2,_r3,_r4,_r5,_r6,_r7) \
"#OC_FDCT8x4\n\t" \
/*Stage 2:*/ \
/*mm7=t3''=t0'-t3'*/ \
"psubw %%mm4,%%mm7\n\t" \
"paddw %%mm4,%%mm4\n\t" \
/*mm6=t2''=t1'-t2'*/ \
"psubw %%mm5,%%mm6\n\t" \
"movq %%mm7,"_r6"(%[y])\n\t" \
"paddw %%mm5,%%mm5\n\t" \
/*mm1=t5''=t6'-t5'*/ \
"psubw %%mm2,%%mm1\n\t" \
"movq %%mm6,"_r2"(%[y])\n\t" \
/*mm4=t0''=t0'+t3'*/ \
"paddw %%mm7,%%mm4\n\t" \
"paddw %%mm2,%%mm2\n\t" \
/*mm5=t1''=t1'+t2'*/ \
"movq %%mm4,"_r0"(%[y])\n\t" \
"paddw %%mm6,%%mm5\n\t" \
/*mm2=t6''=t6'+t5'*/ \
"paddw %%mm1,%%mm2\n\t" \
"movq %%mm5,"_r4"(%[y])\n\t" \
/*mm0=t7', mm1=t5'', mm2=t6'', mm3=t4'.*/ \
/*mm4, mm5, mm6, mm7 are free.*/ \
/*Stage 3:*/ \
/*mm6={2}x4, mm7={27146,0xB500>>1}x2*/ \
"mov $0x5A806A0A,%[a]\n\t" \
"pcmpeqb %%mm6,%%mm6\n\t" \
"movd %[a],%%mm7\n\t" \
"psrlw $15,%%mm6\n\t" \
"punpckldq %%mm7,%%mm7\n\t" \
"paddw %%mm6,%%mm6\n\t" \
/*mm0=0, m2={-1}x4 \
mm5:mm4=t5''*27146+0xB500*/ \
"movq %%mm1,%%mm4\n\t" \
"movq %%mm1,%%mm5\n\t" \
"punpcklwd %%mm6,%%mm4\n\t" \
"movq %%mm2,"_r3"(%[y])\n\t" \
"pmaddwd %%mm7,%%mm4\n\t" \
"movq %%mm0,"_r7"(%[y])\n\t" \
"punpckhwd %%mm6,%%mm5\n\t" \
"pxor %%mm0,%%mm0\n\t" \
"pmaddwd %%mm7,%%mm5\n\t" \
"pcmpeqb %%mm2,%%mm2\n\t" \
/*mm2=t6'', mm1=t5''+(t5''!=0) \
mm4=(t5''*27146+0xB500>>16)*/ \
"pcmpeqw %%mm1,%%mm0\n\t" \
"psrad $16,%%mm4\n\t" \
"psubw %%mm2,%%mm0\n\t" \
"movq "_r3"(%[y]),%%mm2\n\t" \
"psrad $16,%%mm5\n\t" \
"paddw %%mm0,%%mm1\n\t" \
"packssdw %%mm5,%%mm4\n\t" \
/*mm4=s=(t5''*27146+0xB500>>16)+t5''+(t5''!=0)>>1*/ \
"paddw %%mm1,%%mm4\n\t" \
"movq "_r7"(%[y]),%%mm0\n\t" \
"psraw $1,%%mm4\n\t" \
"movq %%mm3,%%mm1\n\t" \
/*mm3=t4''=t4'+s*/ \
"paddw %%mm4,%%mm3\n\t" \
/*mm1=t5'''=t4'-s*/ \
"psubw %%mm4,%%mm1\n\t" \
/*mm1=0, mm3={-1}x4 \
mm5:mm4=t6''*27146+0xB500*/ \
"movq %%mm2,%%mm4\n\t" \
"movq %%mm2,%%mm5\n\t" \
"punpcklwd %%mm6,%%mm4\n\t" \
"movq %%mm1,"_r5"(%[y])\n\t" \
"pmaddwd %%mm7,%%mm4\n\t" \
"movq %%mm3,"_r1"(%[y])\n\t" \
"punpckhwd %%mm6,%%mm5\n\t" \
"pxor %%mm1,%%mm1\n\t" \
"pmaddwd %%mm7,%%mm5\n\t" \
"pcmpeqb %%mm3,%%mm3\n\t" \
/*mm2=t6''+(t6''!=0), mm4=(t6''*27146+0xB500>>16)*/ \
"psrad $16,%%mm4\n\t" \
"pcmpeqw %%mm2,%%mm1\n\t" \
"psrad $16,%%mm5\n\t" \
"psubw %%mm3,%%mm1\n\t" \
"packssdw %%mm5,%%mm4\n\t" \
"paddw %%mm1,%%mm2\n\t" \
/*mm1=t1'' \
mm4=s=(t6''*27146+0xB500>>16)+t6''+(t6''!=0)>>1*/ \
"paddw %%mm2,%%mm4\n\t" \
"movq "_r4"(%[y]),%%mm1\n\t" \
"psraw $1,%%mm4\n\t" \
"movq %%mm0,%%mm2\n\t" \
/*mm7={54491-0x7FFF,0x7FFF}x2 \
mm0=t7''=t7'+s*/ \
"paddw %%mm4,%%mm0\n\t" \
/*mm2=t6'''=t7'-s*/ \
"psubw %%mm4,%%mm2\n\t" \
/*Stage 4:*/ \
/*mm0=0, mm2=t0'' \
mm5:mm4=t1''*27146+0xB500*/ \
"movq %%mm1,%%mm4\n\t" \
"movq %%mm1,%%mm5\n\t" \
"punpcklwd %%mm6,%%mm4\n\t" \
"movq %%mm2,"_r3"(%[y])\n\t" \
"pmaddwd %%mm7,%%mm4\n\t" \
"movq "_r0"(%[y]),%%mm2\n\t" \
"punpckhwd %%mm6,%%mm5\n\t" \
"movq %%mm0,"_r7"(%[y])\n\t" \
"pmaddwd %%mm7,%%mm5\n\t" \
"pxor %%mm0,%%mm0\n\t" \
/*mm7={27146,0x4000>>1}x2 \
mm0=s=(t1''*27146+0xB500>>16)+t1''+(t1''!=0)*/ \
"psrad $16,%%mm4\n\t" \
"mov $0x20006A0A,%[a]\n\t" \
"pcmpeqw %%mm1,%%mm0\n\t" \
"movd %[a],%%mm7\n\t" \
"psrad $16,%%mm5\n\t" \
"psubw %%mm3,%%mm0\n\t" \
"packssdw %%mm5,%%mm4\n\t" \
"paddw %%mm1,%%mm0\n\t" \
"punpckldq %%mm7,%%mm7\n\t" \
"paddw %%mm4,%%mm0\n\t" \
/*mm6={0x00000E3D}x2 \
mm1=-(t0''==0), mm5:mm4=t0''*27146+0x4000*/ \
"movq %%mm2,%%mm4\n\t" \
"movq %%mm2,%%mm5\n\t" \
"punpcklwd %%mm6,%%mm4\n\t" \
"mov $0x0E3D,%[a]\n\t" \
"pmaddwd %%mm7,%%mm4\n\t" \
"punpckhwd %%mm6,%%mm5\n\t" \
"movd %[a],%%mm6\n\t" \
"pmaddwd %%mm7,%%mm5\n\t" \
"pxor %%mm1,%%mm1\n\t" \
"punpckldq %%mm6,%%mm6\n\t" \
"pcmpeqw %%mm2,%%mm1\n\t" \
/*mm4=r=(t0''*27146+0x4000>>16)+t0''+(t0''!=0)*/ \
"psrad $16,%%mm4\n\t" \
"psubw %%mm3,%%mm1\n\t" \
"psrad $16,%%mm5\n\t" \
"paddw %%mm1,%%mm2\n\t" \
"packssdw %%mm5,%%mm4\n\t" \
"movq "_r5"(%[y]),%%mm1\n\t" \
"paddw %%mm2,%%mm4\n\t" \
/*mm2=t6'', mm0=_y[0]=u=r+s>>1 \
The naive implementation could cause overflow, so we use \
u=(r&s)+((r^s)>>1).*/ \
"movq "_r3"(%[y]),%%mm2\n\t" \
"movq %%mm0,%%mm7\n\t" \
"pxor %%mm4,%%mm0\n\t" \
"pand %%mm4,%%mm7\n\t" \
"psraw $1,%%mm0\n\t" \
"mov $0x7FFF54DC,%[a]\n\t" \
"paddw %%mm7,%%mm0\n\t" \
"movd %[a],%%mm7\n\t" \
/*mm7={54491-0x7FFF,0x7FFF}x2 \
mm4=_y[4]=v=r-u*/ \
"psubw %%mm0,%%mm4\n\t" \
"punpckldq %%mm7,%%mm7\n\t" \
"movq %%mm4,"_r4"(%[y])\n\t" \
/*mm0=0, mm7={36410}x4 \
mm1=(t5'''!=0), mm5:mm4=54491*t5'''+0x0E3D*/ \
"movq %%mm1,%%mm4\n\t" \
"movq %%mm1,%%mm5\n\t" \
"punpcklwd %%mm1,%%mm4\n\t" \
"mov $0x8E3A8E3A,%[a]\n\t" \
"pmaddwd %%mm7,%%mm4\n\t" \
"movq %%mm0,"_r0"(%[y])\n\t" \
"punpckhwd %%mm1,%%mm5\n\t" \
"pxor %%mm0,%%mm0\n\t" \
"pmaddwd %%mm7,%%mm5\n\t" \
"pcmpeqw %%mm0,%%mm1\n\t" \
"movd %[a],%%mm7\n\t" \
"psubw %%mm3,%%mm1\n\t" \
"punpckldq %%mm7,%%mm7\n\t" \
"paddd %%mm6,%%mm4\n\t" \
"paddd %%mm6,%%mm5\n\t" \
/*mm0=0 \
mm3:mm1=36410*t6'''+((t5'''!=0)<<16)*/ \
"movq %%mm2,%%mm6\n\t" \
"movq %%mm2,%%mm3\n\t" \
"pmulhw %%mm7,%%mm6\n\t" \
"paddw %%mm2,%%mm1\n\t" \
"pmullw %%mm7,%%mm3\n\t" \
"pxor %%mm0,%%mm0\n\t" \
"paddw %%mm1,%%mm6\n\t" \
"movq %%mm3,%%mm1\n\t" \
"punpckhwd %%mm6,%%mm3\n\t" \
"punpcklwd %%mm6,%%mm1\n\t" \
/*mm3={-1}x4, mm6={1}x4 \
mm4=_y[5]=u=(54491*t5'''+36410*t6'''+0x0E3D>>16)+(t5'''!=0)*/ \
"paddd %%mm3,%%mm5\n\t" \
"paddd %%mm1,%%mm4\n\t" \
"psrad $16,%%mm5\n\t" \
"pxor %%mm6,%%mm6\n\t" \
"psrad $16,%%mm4\n\t" \
"pcmpeqb %%mm3,%%mm3\n\t" \
"packssdw %%mm5,%%mm4\n\t" \
"psubw %%mm3,%%mm6\n\t" \
/*mm1=t7'', mm7={26568,0x3400}x2 \
mm2=s=t6'''-(36410*u>>16)*/ \
"movq %%mm4,%%mm1\n\t" \
"mov $0x340067C8,%[a]\n\t" \
"pmulhw %%mm7,%%mm4\n\t" \
"movd %[a],%%mm7\n\t" \
"movq %%mm1,"_r5"(%[y])\n\t" \
"punpckldq %%mm7,%%mm7\n\t" \
"paddw %%mm1,%%mm4\n\t" \
"movq "_r7"(%[y]),%%mm1\n\t" \
"psubw %%mm4,%%mm2\n\t" \
/*mm6={0x00007B1B}x2 \
mm0=(s!=0), mm5:mm4=s*26568+0x3400*/ \
"movq %%mm2,%%mm4\n\t" \
"movq %%mm2,%%mm5\n\t" \
"punpcklwd %%mm6,%%mm4\n\t" \
"pcmpeqw %%mm2,%%mm0\n\t" \
"pmaddwd %%mm7,%%mm4\n\t" \
"mov $0x7B1B,%[a]\n\t" \
"punpckhwd %%mm6,%%mm5\n\t" \
"movd %[a],%%mm6\n\t" \
"pmaddwd %%mm7,%%mm5\n\t" \
"psubw %%mm3,%%mm0\n\t" \
"punpckldq %%mm6,%%mm6\n\t" \
/*mm7={64277-0x7FFF,0x7FFF}x2 \
mm2=_y[3]=v=(s*26568+0x3400>>17)+s+(s!=0)*/ \
"psrad $17,%%mm4\n\t" \
"paddw %%mm0,%%mm2\n\t" \
"psrad $17,%%mm5\n\t" \
"mov $0x7FFF7B16,%[a]\n\t" \
"packssdw %%mm5,%%mm4\n\t" \
"movd %[a],%%mm7\n\t" \
"paddw %%mm4,%%mm2\n\t" \
"punpckldq %%mm7,%%mm7\n\t" \
/*mm0=0, mm7={12785}x4 \
mm1=(t7''!=0), mm2=t4'', mm5:mm4=64277*t7''+0x7B1B*/ \
"movq %%mm1,%%mm4\n\t" \
"movq %%mm1,%%mm5\n\t" \
"movq %%mm2,"_r3"(%[y])\n\t" \
"punpcklwd %%mm1,%%mm4\n\t" \
"movq "_r1"(%[y]),%%mm2\n\t" \
"pmaddwd %%mm7,%%mm4\n\t" \
"mov $0x31F131F1,%[a]\n\t" \
"punpckhwd %%mm1,%%mm5\n\t" \
"pxor %%mm0,%%mm0\n\t" \
"pmaddwd %%mm7,%%mm5\n\t" \
"pcmpeqw %%mm0,%%mm1\n\t" \
"movd %[a],%%mm7\n\t" \
"psubw %%mm3,%%mm1\n\t" \
"punpckldq %%mm7,%%mm7\n\t" \
"paddd %%mm6,%%mm4\n\t" \
"paddd %%mm6,%%mm5\n\t" \
/*mm3:mm1=12785*t4'''+((t7''!=0)<<16)*/ \
"movq %%mm2,%%mm6\n\t" \
"movq %%mm2,%%mm3\n\t" \
"pmulhw %%mm7,%%mm6\n\t" \
"pmullw %%mm7,%%mm3\n\t" \
"paddw %%mm1,%%mm6\n\t" \
"movq %%mm3,%%mm1\n\t" \
"punpckhwd %%mm6,%%mm3\n\t" \
"punpcklwd %%mm6,%%mm1\n\t" \
/*mm3={-1}x4, mm6={1}x4 \
mm4=_y[1]=u=(12785*t4'''+64277*t7''+0x7B1B>>16)+(t7''!=0)*/ \
"paddd %%mm3,%%mm5\n\t" \
"paddd %%mm1,%%mm4\n\t" \
"psrad $16,%%mm5\n\t" \
"pxor %%mm6,%%mm6\n\t" \
"psrad $16,%%mm4\n\t" \
"pcmpeqb %%mm3,%%mm3\n\t" \
"packssdw %%mm5,%%mm4\n\t" \
"psubw %%mm3,%%mm6\n\t" \
/*mm1=t3'', mm7={20539,0x3000}x2 \
mm4=s=(12785*u>>16)-t4''*/ \
"movq %%mm4,"_r1"(%[y])\n\t" \
"pmulhw %%mm7,%%mm4\n\t" \
"mov $0x3000503B,%[a]\n\t" \
"movq "_r6"(%[y]),%%mm1\n\t" \
"movd %[a],%%mm7\n\t" \
"psubw %%mm2,%%mm4\n\t" \
"punpckldq %%mm7,%%mm7\n\t" \
/*mm6={0x00006CB7}x2 \
mm0=(s!=0), mm5:mm4=s*20539+0x3000*/ \
"movq %%mm4,%%mm5\n\t" \
"movq %%mm4,%%mm2\n\t" \
"punpcklwd %%mm6,%%mm4\n\t" \
"pcmpeqw %%mm2,%%mm0\n\t" \
"pmaddwd %%mm7,%%mm4\n\t" \
"mov $0x6CB7,%[a]\n\t" \
"punpckhwd %%mm6,%%mm5\n\t" \
"movd %[a],%%mm6\n\t" \
"pmaddwd %%mm7,%%mm5\n\t" \
"psubw %%mm3,%%mm0\n\t" \
"punpckldq %%mm6,%%mm6\n\t" \
/*mm7={60547-0x7FFF,0x7FFF}x2 \
mm2=_y[7]=v=(s*20539+0x3000>>20)+s+(s!=0)*/ \
"psrad $20,%%mm4\n\t" \
"paddw %%mm0,%%mm2\n\t" \
"psrad $20,%%mm5\n\t" \
"mov $0x7FFF6C84,%[a]\n\t" \
"packssdw %%mm5,%%mm4\n\t" \
"movd %[a],%%mm7\n\t" \
"paddw %%mm4,%%mm2\n\t" \
"punpckldq %%mm7,%%mm7\n\t" \
/*mm0=0, mm7={25080}x4 \
mm2=t2'', mm5:mm4=60547*t3''+0x6CB7*/ \
"movq %%mm1,%%mm4\n\t" \
"movq %%mm1,%%mm5\n\t" \
"movq %%mm2,"_r7"(%[y])\n\t" \
"punpcklwd %%mm1,%%mm4\n\t" \
"movq "_r2"(%[y]),%%mm2\n\t" \
"pmaddwd %%mm7,%%mm4\n\t" \
"mov $0x61F861F8,%[a]\n\t" \
"punpckhwd %%mm1,%%mm5\n\t" \
"pxor %%mm0,%%mm0\n\t" \
"pmaddwd %%mm7,%%mm5\n\t" \
"movd %[a],%%mm7\n\t" \
"pcmpeqw %%mm0,%%mm1\n\t" \
"psubw %%mm3,%%mm1\n\t" \
"punpckldq %%mm7,%%mm7\n\t" \
"paddd %%mm6,%%mm4\n\t" \
"paddd %%mm6,%%mm5\n\t" \
/*mm3:mm1=25080*t2''+((t3''!=0)<<16)*/ \
"movq %%mm2,%%mm6\n\t" \
"movq %%mm2,%%mm3\n\t" \
"pmulhw %%mm7,%%mm6\n\t" \
"pmullw %%mm7,%%mm3\n\t" \
"paddw %%mm1,%%mm6\n\t" \
"movq %%mm3,%%mm1\n\t" \
"punpckhwd %%mm6,%%mm3\n\t" \
"punpcklwd %%mm6,%%mm1\n\t" \
/*mm1={-1}x4 \
mm4=u=(25080*t2''+60547*t3''+0x6CB7>>16)+(t3''!=0)*/ \
"paddd %%mm3,%%mm5\n\t" \
"paddd %%mm1,%%mm4\n\t" \
"psrad $16,%%mm5\n\t" \
"mov $0x28005460,%[a]\n\t" \
"psrad $16,%%mm4\n\t" \
"pcmpeqb %%mm1,%%mm1\n\t" \
"packssdw %%mm5,%%mm4\n\t" \
/*mm5={1}x4, mm6=_y[2]=u, mm7={21600,0x2800}x2 \
mm4=s=(25080*u>>16)-t2''*/ \
"movq %%mm4,%%mm6\n\t" \
"pmulhw %%mm7,%%mm4\n\t" \
"pxor %%mm5,%%mm5\n\t" \
"movd %[a],%%mm7\n\t" \
"psubw %%mm1,%%mm5\n\t" \
"punpckldq %%mm7,%%mm7\n\t" \
"psubw %%mm2,%%mm4\n\t" \
/*mm2=s+(s!=0) \
mm4:mm3=s*21600+0x2800*/ \
"movq %%mm4,%%mm3\n\t" \
"movq %%mm4,%%mm2\n\t" \
"punpckhwd %%mm5,%%mm4\n\t" \
"pcmpeqw %%mm2,%%mm0\n\t" \
"pmaddwd %%mm7,%%mm4\n\t" \
"psubw %%mm1,%%mm0\n\t" \
"punpcklwd %%mm5,%%mm3\n\t" \
"paddw %%mm0,%%mm2\n\t" \
"pmaddwd %%mm7,%%mm3\n\t" \
/*mm0=_y[4], mm1=_y[7], mm4=_y[0], mm5=_y[5] \
mm3=_y[6]=v=(s*21600+0x2800>>18)+s+(s!=0)*/ \
"movq "_r4"(%[y]),%%mm0\n\t" \
"psrad $18,%%mm4\n\t" \
"movq "_r5"(%[y]),%%mm5\n\t" \
"psrad $18,%%mm3\n\t" \
"movq "_r7"(%[y]),%%mm1\n\t" \
"packssdw %%mm4,%%mm3\n\t" \
"movq "_r0"(%[y]),%%mm4\n\t" \
"paddw %%mm2,%%mm3\n\t" \
/*On input, mm4=_y[0], mm6=_y[2], mm0=_y[4], mm5=_y[5], mm3=_y[6], mm1=_y[7].
On output, {_y[4],mm1,mm2,mm3} contains the transpose of _y[4...7] and
{mm4,mm5,mm6,mm7} contains the transpose of _y[0...3].*/
# define OC_TRANSPOSE8x4(_r0,_r1,_r2,_r3,_r4,_r5,_r6,_r7) \
"#OC_TRANSPOSE8x4\n\t" \
/*First 4x4 transpose:*/ \
/*mm0 = e3 e2 e1 e0 \
mm5 = f3 f2 f1 f0 \
mm3 = g3 g2 g1 g0 \
mm1 = h3 h2 h1 h0*/ \
"movq %%mm0,%%mm2\n\t" \
"punpcklwd %%mm5,%%mm0\n\t" \
"punpckhwd %%mm5,%%mm2\n\t" \
"movq %%mm3,%%mm5\n\t" \
"punpcklwd %%mm1,%%mm3\n\t" \
"punpckhwd %%mm1,%%mm5\n\t" \
/*mm0 = f1 e1 f0 e0 \
mm2 = f3 e3 f2 e2 \
mm3 = h1 g1 h0 g0 \
mm5 = h3 g3 h2 g2*/ \
"movq %%mm0,%%mm1\n\t" \
"punpckldq %%mm3,%%mm0\n\t" \
"movq %%mm0,"_r4"(%[y])\n\t" \
"punpckhdq %%mm3,%%mm1\n\t" \
"movq "_r1"(%[y]),%%mm0\n\t" \
"movq %%mm2,%%mm3\n\t" \
"punpckldq %%mm5,%%mm2\n\t" \
"punpckhdq %%mm5,%%mm3\n\t" \
"movq "_r3"(%[y]),%%mm5\n\t" \
/*_y[4] = h0 g0 f0 e0 \
mm1 = h1 g1 f1 e1 \
mm2 = h2 g2 f2 e2 \
mm3 = h3 g3 f3 e3*/ \
/*Second 4x4 transpose:*/ \
/*mm4 = a3 a2 a1 a0 \
mm0 = b3 b2 b1 b0 \
mm6 = c3 c2 c1 c0 \
mm5 = d3 d2 d1 d0*/ \
"movq %%mm4,%%mm7\n\t" \
"punpcklwd %%mm0,%%mm4\n\t" \
"punpckhwd %%mm0,%%mm7\n\t" \
"movq %%mm6,%%mm0\n\t" \
"punpcklwd %%mm5,%%mm6\n\t" \
"punpckhwd %%mm5,%%mm0\n\t" \
/*mm4 = b1 a1 b0 a0 \
mm7 = b3 a3 b2 a2 \
mm6 = d1 c1 d0 c0 \
mm0 = d3 c3 d2 c2*/ \
"movq %%mm4,%%mm5\n\t" \
"punpckldq %%mm6,%%mm4\n\t" \
"punpckhdq %%mm6,%%mm5\n\t" \
"movq %%mm7,%%mm6\n\t" \
"punpckhdq %%mm0,%%mm7\n\t" \
"punpckldq %%mm0,%%mm6\n\t" \
/*mm4 = d0 c0 b0 a0 \
mm5 = d1 c1 b1 a1 \
mm6 = d2 c2 b2 a2 \
mm7 = d3 c3 b3 a3*/ \
/*MMX implementation of the fDCT.*/
void oc_enc_fdct8x8_mmxext(ogg_int16_t _y[64],const ogg_int16_t _x[64]){
OC_ALIGN8(ogg_int16_t buf[64]);
ptrdiff_t a;
__asm__ __volatile__(
/*Add two extra bits of working precision to improve accuracy; any more and
we could overflow.*/
/*We also add biases to correct for some systematic error that remains in
the full fDCT->iDCT round trip.*/
"movq 0x00(%[x]),%%mm0\n\t"
"movq 0x10(%[x]),%%mm1\n\t"
"movq 0x20(%[x]),%%mm2\n\t"
"movq 0x30(%[x]),%%mm3\n\t"
"pcmpeqb %%mm4,%%mm4\n\t"
"pxor %%mm7,%%mm7\n\t"
"movq %%mm0,%%mm5\n\t"
"psllw $2,%%mm0\n\t"
"pcmpeqw %%mm7,%%mm5\n\t"
"movq 0x70(%[x]),%%mm7\n\t"
"psllw $2,%%mm1\n\t"
"psubw %%mm4,%%mm5\n\t"
"psllw $2,%%mm2\n\t"
"mov $1,%[a]\n\t"
"pslld $16,%%mm5\n\t"
"movd %[a],%%mm6\n\t"
"psllq $16,%%mm5\n\t"
"mov $0x10001,%[a]\n\t"
"psllw $2,%%mm3\n\t"
"movd %[a],%%mm4\n\t"
"punpckhwd %%mm6,%%mm5\n\t"
"psubw %%mm6,%%mm1\n\t"
"movq 0x60(%[x]),%%mm6\n\t"
"paddw %%mm5,%%mm0\n\t"
"movq 0x50(%[x]),%%mm5\n\t"
"paddw %%mm4,%%mm0\n\t"
"movq 0x40(%[x]),%%mm4\n\t"
/*We inline stage1 of the transform here so we can get better instruction
scheduling with the shifts.*/
/*mm0=t7'=t0-t7*/
"psllw $2,%%mm7\n\t"
"psubw %%mm7,%%mm0\n\t"
"psllw $2,%%mm6\n\t"
"paddw %%mm7,%%mm7\n\t"
/*mm1=t6'=t1-t6*/
"psllw $2,%%mm5\n\t"
"psubw %%mm6,%%mm1\n\t"
"psllw $2,%%mm4\n\t"
"paddw %%mm6,%%mm6\n\t"
/*mm2=t5'=t2-t5*/
"psubw %%mm5,%%mm2\n\t"
"paddw %%mm5,%%mm5\n\t"
/*mm3=t4'=t3-t4*/
"psubw %%mm4,%%mm3\n\t"
"paddw %%mm4,%%mm4\n\t"
/*mm7=t0'=t0+t7*/
"paddw %%mm0,%%mm7\n\t"
/*mm6=t1'=t1+t6*/
"paddw %%mm1,%%mm6\n\t"
/*mm5=t2'=t2+t5*/
"paddw %%mm2,%%mm5\n\t"
/*mm4=t3'=t3+t4*/
"paddw %%mm3,%%mm4\n\t"
OC_FDCT8x4("0x00","0x10","0x20","0x30","0x40","0x50","0x60","0x70")
OC_TRANSPOSE8x4("0x00","0x10","0x20","0x30","0x40","0x50","0x60","0x70")
/*Swap out this 8x4 block for the next one.*/
"movq 0x08(%[x]),%%mm0\n\t"
"movq %%mm7,0x30(%[y])\n\t"
"movq 0x78(%[x]),%%mm7\n\t"
"movq %%mm1,0x50(%[y])\n\t"
"movq 0x18(%[x]),%%mm1\n\t"
"movq %%mm6,0x20(%[y])\n\t"
"movq 0x68(%[x]),%%mm6\n\t"
"movq %%mm2,0x60(%[y])\n\t"
"movq 0x28(%[x]),%%mm2\n\t"
"movq %%mm5,0x10(%[y])\n\t"
"movq 0x58(%[x]),%%mm5\n\t"
"movq %%mm3,0x70(%[y])\n\t"
"movq 0x38(%[x]),%%mm3\n\t"
/*And increase its working precision, too.*/
"psllw $2,%%mm0\n\t"
"movq %%mm4,0x00(%[y])\n\t"
"psllw $2,%%mm7\n\t"
"movq 0x48(%[x]),%%mm4\n\t"
/*We inline stage1 of the transform here so we can get better instruction
scheduling with the shifts.*/
/*mm0=t7'=t0-t7*/
"psubw %%mm7,%%mm0\n\t"
"psllw $2,%%mm1\n\t"
"paddw %%mm7,%%mm7\n\t"
"psllw $2,%%mm6\n\t"
/*mm1=t6'=t1-t6*/
"psubw %%mm6,%%mm1\n\t"
"psllw $2,%%mm2\n\t"
"paddw %%mm6,%%mm6\n\t"
"psllw $2,%%mm5\n\t"
/*mm2=t5'=t2-t5*/
"psubw %%mm5,%%mm2\n\t"
"psllw $2,%%mm3\n\t"
"paddw %%mm5,%%mm5\n\t"
"psllw $2,%%mm4\n\t"
/*mm3=t4'=t3-t4*/
"psubw %%mm4,%%mm3\n\t"
"paddw %%mm4,%%mm4\n\t"
/*mm7=t0'=t0+t7*/
"paddw %%mm0,%%mm7\n\t"
/*mm6=t1'=t1+t6*/
"paddw %%mm1,%%mm6\n\t"
/*mm5=t2'=t2+t5*/
"paddw %%mm2,%%mm5\n\t"
/*mm4=t3'=t3+t4*/
"paddw %%mm3,%%mm4\n\t"
OC_FDCT8x4("0x08","0x18","0x28","0x38","0x48","0x58","0x68","0x78")
OC_TRANSPOSE8x4("0x08","0x18","0x28","0x38","0x48","0x58","0x68","0x78")
/*Here the first 4x4 block of output from the last transpose is the second
4x4 block of input for the next transform.
We have cleverly arranged that it already be in the appropriate place,
so we only have to do half the stores and loads.*/
"movq 0x00(%[y]),%%mm0\n\t"
"movq %%mm1,0x58(%[y])\n\t"
"movq 0x10(%[y]),%%mm1\n\t"
"movq %%mm2,0x68(%[y])\n\t"
"movq 0x20(%[y]),%%mm2\n\t"
"movq %%mm3,0x78(%[y])\n\t"
"movq 0x30(%[y]),%%mm3\n\t"
OC_FDCT_STAGE1_8x4
OC_FDCT8x4("0x00","0x10","0x20","0x30","0x08","0x18","0x28","0x38")
/*mm2={-2}x4*/
"pcmpeqw %%mm2,%%mm2\n\t"
"paddw %%mm2,%%mm2\n\t"
/*Round and store the results (no transpose).*/
"movq 0x10(%[y]),%%mm7\n\t"
"psubw %%mm2,%%mm4\n\t"
"psubw %%mm2,%%mm6\n\t"
"psraw $2,%%mm4\n\t"
"psubw %%mm2,%%mm0\n\t"
"movq %%mm4,"OC_MEM_OFFS(0x00,buf)"\n\t"
"movq 0x30(%[y]),%%mm4\n\t"
"psraw $2,%%mm6\n\t"
"psubw %%mm2,%%mm5\n\t"
"movq %%mm6,"OC_MEM_OFFS(0x20,buf)"\n\t"
"psraw $2,%%mm0\n\t"
"psubw %%mm2,%%mm3\n\t"
"movq %%mm0,"OC_MEM_OFFS(0x40,buf)"\n\t"
"psraw $2,%%mm5\n\t"
"psubw %%mm2,%%mm1\n\t"
"movq %%mm5,"OC_MEM_OFFS(0x50,buf)"\n\t"
"psraw $2,%%mm3\n\t"
"psubw %%mm2,%%mm7\n\t"
"movq %%mm3,"OC_MEM_OFFS(0x60,buf)"\n\t"
"psraw $2,%%mm1\n\t"
"psubw %%mm2,%%mm4\n\t"
"movq %%mm1,"OC_MEM_OFFS(0x70,buf)"\n\t"
"psraw $2,%%mm7\n\t"
"movq %%mm7,"OC_MEM_OFFS(0x10,buf)"\n\t"
"psraw $2,%%mm4\n\t"
"movq %%mm4,"OC_MEM_OFFS(0x30,buf)"\n\t"
/*Load the next block.*/
"movq 0x40(%[y]),%%mm0\n\t"
"movq 0x78(%[y]),%%mm7\n\t"
"movq 0x50(%[y]),%%mm1\n\t"
"movq 0x68(%[y]),%%mm6\n\t"
"movq 0x60(%[y]),%%mm2\n\t"
"movq 0x58(%[y]),%%mm5\n\t"
"movq 0x70(%[y]),%%mm3\n\t"
"movq 0x48(%[y]),%%mm4\n\t"
OC_FDCT_STAGE1_8x4
OC_FDCT8x4("0x40","0x50","0x60","0x70","0x48","0x58","0x68","0x78")
/*mm2={-2}x4*/
"pcmpeqw %%mm2,%%mm2\n\t"
"paddw %%mm2,%%mm2\n\t"
/*Round and store the results (no transpose).*/
"movq 0x50(%[y]),%%mm7\n\t"
"psubw %%mm2,%%mm4\n\t"
"psubw %%mm2,%%mm6\n\t"
"psraw $2,%%mm4\n\t"
"psubw %%mm2,%%mm0\n\t"
"movq %%mm4,"OC_MEM_OFFS(0x08,buf)"\n\t"
"movq 0x70(%[y]),%%mm4\n\t"
"psraw $2,%%mm6\n\t"
"psubw %%mm2,%%mm5\n\t"
"movq %%mm6,"OC_MEM_OFFS(0x28,buf)"\n\t"
"psraw $2,%%mm0\n\t"
"psubw %%mm2,%%mm3\n\t"
"movq %%mm0,"OC_MEM_OFFS(0x48,buf)"\n\t"
"psraw $2,%%mm5\n\t"
"psubw %%mm2,%%mm1\n\t"
"movq %%mm5,"OC_MEM_OFFS(0x58,buf)"\n\t"
"psraw $2,%%mm3\n\t"
"psubw %%mm2,%%mm7\n\t"
"movq %%mm3,"OC_MEM_OFFS(0x68,buf)"\n\t"
"psraw $2,%%mm1\n\t"
"psubw %%mm2,%%mm4\n\t"
"movq %%mm1,"OC_MEM_OFFS(0x78,buf)"\n\t"
"psraw $2,%%mm7\n\t"
"movq %%mm7,"OC_MEM_OFFS(0x18,buf)"\n\t"
"psraw $2,%%mm4\n\t"
"movq %%mm4,"OC_MEM_OFFS(0x38,buf)"\n\t"
/*Final transpose and zig-zag.*/
#define OC_ZZ_LOAD_ROW_LO(_row,_reg) \
"movq "OC_MEM_OFFS(16*_row,buf)","_reg"\n\t" \
#define OC_ZZ_LOAD_ROW_HI(_row,_reg) \
"movq "OC_MEM_OFFS(16*_row+8,buf)","_reg"\n\t" \
OC_TRANSPOSE_ZIG_ZAG_MMXEXT
#undef OC_ZZ_LOAD_ROW_LO
#undef OC_ZZ_LOAD_ROW_HI
:[a]"=&r"(a),[buf]"=m"(OC_ARRAY_OPERAND(ogg_int16_t,buf,64))
:[y]"r"(_y),[x]"r"(_x)
:"memory"
);
}
#endif
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