/********************************************************************
* *
* 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/ *
* *
********************************************************************/
/*SSE2 fDCT implementation for x86_64.*/
/*$Id: fdct_ses2.c 14579 2008-03-12 06:42:40Z xiphmont $*/
#include <stddef.h>
#include "x86enc.h"
#include "x86zigzag.h"
#include "sse2trans.h"
#if defined(OC_X86_64_ASM)
# define OC_FDCT_8x8 \
/*Note: xmm15={0}x8 and xmm14={-1}x8.*/ \
"#OC_FDCT_8x8\n\t" \
/*Stage 1:*/ \
"movdqa %%xmm0,%%xmm11\n\t" \
"movdqa %%xmm1,%%xmm10\n\t" \
"movdqa %%xmm2,%%xmm9\n\t" \
"movdqa %%xmm3,%%xmm8\n\t" \
/*xmm11=t7'=t0-t7*/ \
"psubw %%xmm7,%%xmm11\n\t" \
/*xmm10=t6'=t1-t6*/ \
"psubw %%xmm6,%%xmm10\n\t" \
/*xmm9=t5'=t2-t5*/ \
"psubw %%xmm5,%%xmm9\n\t" \
/*xmm8=t4'=t3-t4*/ \
"psubw %%xmm4,%%xmm8\n\t" \
/*xmm0=t0'=t0+t7*/ \
"paddw %%xmm7,%%xmm0\n\t" \
/*xmm1=t1'=t1+t6*/ \
"paddw %%xmm6,%%xmm1\n\t" \
/*xmm5=t2'=t2+t5*/ \
"paddw %%xmm2,%%xmm5\n\t" \
/*xmm4=t3'=t3+t4*/ \
"paddw %%xmm3,%%xmm4\n\t" \
/*xmm2,3,6,7 are now free.*/ \
/*Stage 2:*/ \
"movdqa %%xmm0,%%xmm3\n\t" \
"mov $0x5A806A0A,%[a]\n\t" \
"movdqa %%xmm1,%%xmm2\n\t" \
"movd %[a],%%xmm13\n\t" \
"movdqa %%xmm10,%%xmm6\n\t" \
"pshufd $00,%%xmm13,%%xmm13\n\t" \
/*xmm2=t2''=t1'-t2'*/ \
"psubw %%xmm5,%%xmm2\n\t" \
"pxor %%xmm12,%%xmm12\n\t" \
/*xmm3=t3''=t0'-t3'*/ \
"psubw %%xmm4,%%xmm3\n\t" \
"psubw %%xmm14,%%xmm12\n\t" \
/*xmm10=t5''=t6'-t5'*/ \
"psubw %%xmm9,%%xmm10\n\t" \
"paddw %%xmm12,%%xmm12\n\t" \
/*xmm4=t0''=t0'+t3'*/ \
"paddw %%xmm0,%%xmm4\n\t" \
/*xmm1=t1''=t1'+t2'*/ \
"paddw %%xmm5,%%xmm1\n\t" \
/*xmm6=t6''=t6'+t5'*/ \
"paddw %%xmm9,%%xmm6\n\t" \
/*xmm0,xmm5,xmm9 are now free.*/ \
/*Stage 3:*/ \
/*xmm10:xmm5=t5''*27146+0xB500 \
xmm0=t5''*/ \
"movdqa %%xmm10,%%xmm5\n\t" \
"movdqa %%xmm10,%%xmm0\n\t" \
"punpckhwd %%xmm12,%%xmm10\n\t" \
"pmaddwd %%xmm13,%%xmm10\n\t" \
"punpcklwd %%xmm12,%%xmm5\n\t" \
"pmaddwd %%xmm13,%%xmm5\n\t" \
/*xmm5=(t5''*27146+0xB500>>16)+t5''*/ \
"psrad $16,%%xmm10\n\t" \
"psrad $16,%%xmm5\n\t" \
"packssdw %%xmm10,%%xmm5\n\t" \
"paddw %%xmm0,%%xmm5\n\t" \
/*xmm0=s=(t5''*27146+0xB500>>16)+t5''+(t5''!=0)>>1*/ \
"pcmpeqw %%xmm15,%%xmm0\n\t" \
"psubw %%xmm14,%%xmm0\n\t" \
"paddw %%xmm5,%%xmm0\n\t" \
"movdqa %%xmm8,%%xmm5\n\t" \
"psraw $1,%%xmm0\n\t" \
/*xmm5=t5'''=t4'-s*/ \
"psubw %%xmm0,%%xmm5\n\t" \
/*xmm8=t4''=t4'+s*/ \
"paddw %%xmm0,%%xmm8\n\t" \
/*xmm0,xmm7,xmm9,xmm10 are free.*/ \
/*xmm7:xmm9=t6''*27146+0xB500*/ \
"movdqa %%xmm6,%%xmm7\n\t" \
"movdqa %%xmm6,%%xmm9\n\t" \
"punpckhwd %%xmm12,%%xmm7\n\t" \
"pmaddwd %%xmm13,%%xmm7\n\t" \
"punpcklwd %%xmm12,%%xmm9\n\t" \
"pmaddwd %%xmm13,%%xmm9\n\t" \
/*xmm9=(t6''*27146+0xB500>>16)+t6''*/ \
"psrad $16,%%xmm7\n\t" \
"psrad $16,%%xmm9\n\t" \
"packssdw %%xmm7,%%xmm9\n\t" \
"paddw %%xmm6,%%xmm9\n\t" \
/*xmm9=s=(t6''*27146+0xB500>>16)+t6''+(t6''!=0)>>1*/ \
"pcmpeqw %%xmm15,%%xmm6\n\t" \
"psubw %%xmm14,%%xmm6\n\t" \
"paddw %%xmm6,%%xmm9\n\t" \
"movdqa %%xmm11,%%xmm7\n\t" \
"psraw $1,%%xmm9\n\t" \
/*xmm7=t6'''=t7'-s*/ \
"psubw %%xmm9,%%xmm7\n\t" \
/*xmm9=t7''=t7'+s*/ \
"paddw %%xmm11,%%xmm9\n\t" \
/*xmm0,xmm6,xmm10,xmm11 are free.*/ \
/*Stage 4:*/ \
/*xmm10:xmm0=t1''*27146+0xB500*/ \
"movdqa %%xmm1,%%xmm0\n\t" \
"movdqa %%xmm1,%%xmm10\n\t" \
"punpcklwd %%xmm12,%%xmm0\n\t" \
"pmaddwd %%xmm13,%%xmm0\n\t" \
"punpckhwd %%xmm12,%%xmm10\n\t" \
"pmaddwd %%xmm13,%%xmm10\n\t" \
/*xmm0=(t1''*27146+0xB500>>16)+t1''*/ \
"psrad $16,%%xmm0\n\t" \
"psrad $16,%%xmm10\n\t" \
"mov $0x20006A0A,%[a]\n\t" \
"packssdw %%xmm10,%%xmm0\n\t" \
"movd %[a],%%xmm13\n\t" \
"paddw %%xmm1,%%xmm0\n\t" \
/*xmm0=s=(t1''*27146+0xB500>>16)+t1''+(t1''!=0)*/ \
"pcmpeqw %%xmm15,%%xmm1\n\t" \
"pshufd $00,%%xmm13,%%xmm13\n\t" \
"psubw %%xmm14,%%xmm1\n\t" \
"paddw %%xmm1,%%xmm0\n\t" \
/*xmm10:xmm4=t0''*27146+0x4000*/ \
"movdqa %%xmm4,%%xmm1\n\t" \
"movdqa %%xmm4,%%xmm10\n\t" \
"punpcklwd %%xmm12,%%xmm4\n\t" \
"pmaddwd %%xmm13,%%xmm4\n\t" \
"punpckhwd %%xmm12,%%xmm10\n\t" \
"pmaddwd %%xmm13,%%xmm10\n\t" \
/*xmm4=(t0''*27146+0x4000>>16)+t0''*/ \
"psrad $16,%%xmm4\n\t" \
"psrad $16,%%xmm10\n\t" \
"mov $0x6CB7,%[a]\n\t" \
"packssdw %%xmm10,%%xmm4\n\t" \
"movd %[a],%%xmm12\n\t" \
"paddw %%xmm1,%%xmm4\n\t" \
/*xmm4=r=(t0''*27146+0x4000>>16)+t0''+(t0''!=0)*/ \
"pcmpeqw %%xmm15,%%xmm1\n\t" \
"pshufd $00,%%xmm12,%%xmm12\n\t" \
"psubw %%xmm14,%%xmm1\n\t" \
"mov $0x7FFF6C84,%[a]\n\t" \
"paddw %%xmm1,%%xmm4\n\t" \
/*xmm0=_y[0]=u=r+s>>1 \
The naive implementation could cause overflow, so we use \
u=(r&s)+((r^s)>>1).*/ \
"movdqa %%xmm0,%%xmm6\n\t" \
"pxor %%xmm4,%%xmm0\n\t" \
"pand %%xmm4,%%xmm6\n\t" \
"psraw $1,%%xmm0\n\t" \
"movd %[a],%%xmm13\n\t" \
"paddw %%xmm6,%%xmm0\n\t" \
/*xmm4=_y[4]=v=r-u*/ \
"pshufd $00,%%xmm13,%%xmm13\n\t" \
"psubw %%xmm0,%%xmm4\n\t" \
/*xmm1,xmm6,xmm10,xmm11 are free.*/ \
/*xmm6:xmm10=60547*t3''+0x6CB7*/ \
"movdqa %%xmm3,%%xmm10\n\t" \
"movdqa %%xmm3,%%xmm6\n\t" \
"punpcklwd %%xmm3,%%xmm10\n\t" \
"pmaddwd %%xmm13,%%xmm10\n\t" \
"mov $0x61F861F8,%[a]\n\t" \
"punpckhwd %%xmm3,%%xmm6\n\t" \
"pmaddwd %%xmm13,%%xmm6\n\t" \
"movd %[a],%%xmm13\n\t" \
"paddd %%xmm12,%%xmm10\n\t" \
"pshufd $00,%%xmm13,%%xmm13\n\t" \
"paddd %%xmm12,%%xmm6\n\t" \
/*xmm1:xmm2=25080*t2'' \
xmm12=t2''*/ \
"movdqa %%xmm2,%%xmm11\n\t" \
"movdqa %%xmm2,%%xmm12\n\t" \
"pmullw %%xmm13,%%xmm2\n\t" \
"pmulhw %%xmm13,%%xmm11\n\t" \
"movdqa %%xmm2,%%xmm1\n\t" \
"punpcklwd %%xmm11,%%xmm2\n\t" \
"punpckhwd %%xmm11,%%xmm1\n\t" \
/*xmm10=u=(25080*t2''+60547*t3''+0x6CB7>>16)+(t3''!=0)*/ \
"paddd %%xmm2,%%xmm10\n\t" \
"paddd %%xmm1,%%xmm6\n\t" \
"psrad $16,%%xmm10\n\t" \
"pcmpeqw %%xmm15,%%xmm3\n\t" \
"psrad $16,%%xmm6\n\t" \
"psubw %%xmm14,%%xmm3\n\t" \
"packssdw %%xmm6,%%xmm10\n\t" \
"paddw %%xmm3,%%xmm10\n\t" \
/*xmm2=_y[2]=u \
xmm10=s=(25080*u>>16)-t2''*/ \
"movdqa %%xmm10,%%xmm2\n\t" \
"pmulhw %%xmm13,%%xmm10\n\t" \
"psubw %%xmm12,%%xmm10\n\t" \
/*xmm1:xmm6=s*21600+0x2800*/ \
"pxor %%xmm12,%%xmm12\n\t" \
"psubw %%xmm14,%%xmm12\n\t" \
"mov $0x28005460,%[a]\n\t" \
"movd %[a],%%xmm13\n\t" \
"pshufd $00,%%xmm13,%%xmm13\n\t" \
"movdqa %%xmm10,%%xmm6\n\t" \
"movdqa %%xmm10,%%xmm1\n\t" \
"punpcklwd %%xmm12,%%xmm6\n\t" \
"pmaddwd %%xmm13,%%xmm6\n\t" \
"mov $0x0E3D,%[a]\n\t" \
"punpckhwd %%xmm12,%%xmm1\n\t" \
"pmaddwd %%xmm13,%%xmm1\n\t" \
/*xmm6=(s*21600+0x2800>>18)+s*/ \
"psrad $18,%%xmm6\n\t" \
"psrad $18,%%xmm1\n\t" \
"movd %[a],%%xmm12\n\t" \
"packssdw %%xmm1,%%xmm6\n\t" \
"pshufd $00,%%xmm12,%%xmm12\n\t" \
"paddw %%xmm10,%%xmm6\n\t" \
/*xmm6=_y[6]=v=(s*21600+0x2800>>18)+s+(s!=0)*/ \
"mov $0x7FFF54DC,%[a]\n\t" \
"pcmpeqw %%xmm15,%%xmm10\n\t" \
"movd %[a],%%xmm13\n\t" \
"psubw %%xmm14,%%xmm10\n\t" \
"pshufd $00,%%xmm13,%%xmm13\n\t" \
"paddw %%xmm10,%%xmm6\n\t " \
/*xmm1,xmm3,xmm10,xmm11 are free.*/ \
/*xmm11:xmm10=54491*t5'''+0x0E3D*/ \
"movdqa %%xmm5,%%xmm10\n\t" \
"movdqa %%xmm5,%%xmm11\n\t" \
"punpcklwd %%xmm5,%%xmm10\n\t" \
"pmaddwd %%xmm13,%%xmm10\n\t" \
"mov $0x8E3A8E3A,%[a]\n\t" \
"punpckhwd %%xmm5,%%xmm11\n\t" \
"pmaddwd %%xmm13,%%xmm11\n\t" \
"movd %[a],%%xmm13\n\t" \
"paddd %%xmm12,%%xmm10\n\t" \
"pshufd $00,%%xmm13,%%xmm13\n\t" \
"paddd %%xmm12,%%xmm11\n\t" \
/*xmm7:xmm12=36410*t6''' \
xmm1=t6'''*/ \
"movdqa %%xmm7,%%xmm3\n\t" \
"movdqa %%xmm7,%%xmm1\n\t" \
"pmulhw %%xmm13,%%xmm3\n\t" \
"pmullw %%xmm13,%%xmm7\n\t" \
"paddw %%xmm1,%%xmm3\n\t" \
"movdqa %%xmm7,%%xmm12\n\t" \
"punpckhwd %%xmm3,%%xmm7\n\t" \
"punpcklwd %%xmm3,%%xmm12\n\t" \
/*xmm10=u=(54491*t5'''+36410*t6'''+0x0E3D>>16)+(t5'''!=0)*/ \
"paddd %%xmm12,%%xmm10\n\t" \
"paddd %%xmm7,%%xmm11\n\t" \
"psrad $16,%%xmm10\n\t" \
"pcmpeqw %%xmm15,%%xmm5\n\t" \
"psrad $16,%%xmm11\n\t" \
"psubw %%xmm14,%%xmm5\n\t" \
"packssdw %%xmm11,%%xmm10\n\t" \
"pxor %%xmm12,%%xmm12\n\t" \
"paddw %%xmm5,%%xmm10\n\t" \
/*xmm5=_y[5]=u \
xmm1=s=t6'''-(36410*u>>16)*/ \
"psubw %%xmm14,%%xmm12\n\t" \
"movdqa %%xmm10,%%xmm5\n\t" \
"mov $0x340067C8,%[a]\n\t" \
"pmulhw %%xmm13,%%xmm10\n\t" \
"movd %[a],%%xmm13\n\t" \
"paddw %%xmm5,%%xmm10\n\t" \
"pshufd $00,%%xmm13,%%xmm13\n\t" \
"psubw %%xmm10,%%xmm1\n\t" \
/*xmm11:xmm3=s*26568+0x3400*/ \
"movdqa %%xmm1,%%xmm3\n\t" \
"movdqa %%xmm1,%%xmm11\n\t" \
"punpcklwd %%xmm12,%%xmm3\n\t" \
"pmaddwd %%xmm13,%%xmm3\n\t" \
"mov $0x7B1B,%[a]\n\t" \
"punpckhwd %%xmm12,%%xmm11\n\t" \
"pmaddwd %%xmm13,%%xmm11\n\t" \
/*xmm3=(s*26568+0x3400>>17)+s*/ \
"psrad $17,%%xmm3\n\t" \
"psrad $17,%%xmm11\n\t" \
"movd %[a],%%xmm12\n\t" \
"packssdw %%xmm11,%%xmm3\n\t" \
"pshufd $00,%%xmm12,%%xmm12\n\t" \
"paddw %%xmm1,%%xmm3\n\t" \
/*xmm3=_y[3]=v=(s*26568+0x3400>>17)+s+(s!=0)*/ \
"mov $0x7FFF7B16,%[a]\n\t" \
"pcmpeqw %%xmm15,%%xmm1\n\t" \
"movd %[a],%%xmm13\n\t" \
"psubw %%xmm14,%%xmm1\n\t" \
"pshufd $00,%%xmm13,%%xmm13\n\t" \
"paddw %%xmm1,%%xmm3\n\t " \
/*xmm1,xmm7,xmm10,xmm11 are free.*/ \
/*xmm11:xmm10=64277*t7''+0x7B1B*/ \
"movdqa %%xmm9,%%xmm10\n\t" \
"movdqa %%xmm9,%%xmm11\n\t" \
"punpcklwd %%xmm9,%%xmm10\n\t" \
"pmaddwd %%xmm13,%%xmm10\n\t" \
"mov $0x31F131F1,%[a]\n\t" \
"punpckhwd %%xmm9,%%xmm11\n\t" \
"pmaddwd %%xmm13,%%xmm11\n\t" \
"movd %[a],%%xmm13\n\t" \
"paddd %%xmm12,%%xmm10\n\t" \
"pshufd $00,%%xmm13,%%xmm13\n\t" \
"paddd %%xmm12,%%xmm11\n\t" \
/*xmm12:xmm7=12785*t4''*/ \
"movdqa %%xmm8,%%xmm7\n\t" \
"movdqa %%xmm8,%%xmm1\n\t" \
"pmullw %%xmm13,%%xmm7\n\t" \
"pmulhw %%xmm13,%%xmm1\n\t" \
"movdqa %%xmm7,%%xmm12\n\t" \
"punpcklwd %%xmm1,%%xmm7\n\t" \
"punpckhwd %%xmm1,%%xmm12\n\t" \
/*xmm10=u=(12785*t4''+64277*t7''+0x7B1B>>16)+(t7''!=0)*/ \
"paddd %%xmm7,%%xmm10\n\t" \
"paddd %%xmm12,%%xmm11\n\t" \
"psrad $16,%%xmm10\n\t" \
"pcmpeqw %%xmm15,%%xmm9\n\t" \
"psrad $16,%%xmm11\n\t" \
"psubw %%xmm14,%%xmm9\n\t" \
"packssdw %%xmm11,%%xmm10\n\t" \
"pxor %%xmm12,%%xmm12\n\t" \
"paddw %%xmm9,%%xmm10\n\t" \
/*xmm1=_y[1]=u \
xmm10=s=(12785*u>>16)-t4''*/ \
"psubw %%xmm14,%%xmm12\n\t" \
"movdqa %%xmm10,%%xmm1\n\t" \
"mov $0x3000503B,%[a]\n\t" \
"pmulhw %%xmm13,%%xmm10\n\t" \
"movd %[a],%%xmm13\n\t" \
"psubw %%xmm8,%%xmm10\n\t" \
"pshufd $00,%%xmm13,%%xmm13\n\t" \
/*xmm8:xmm7=s*20539+0x3000*/ \
"movdqa %%xmm10,%%xmm7\n\t" \
"movdqa %%xmm10,%%xmm8\n\t" \
"punpcklwd %%xmm12,%%xmm7\n\t" \
"pmaddwd %%xmm13,%%xmm7\n\t" \
"punpckhwd %%xmm12,%%xmm8\n\t" \
"pmaddwd %%xmm13,%%xmm8\n\t" \
/*xmm7=(s*20539+0x3000>>20)+s*/ \
"psrad $20,%%xmm7\n\t" \
"psrad $20,%%xmm8\n\t" \
"packssdw %%xmm8,%%xmm7\n\t" \
"paddw %%xmm10,%%xmm7\n\t" \
/*xmm7=_y[7]=v=(s*20539+0x3000>>20)+s+(s!=0)*/ \
"pcmpeqw %%xmm15,%%xmm10\n\t" \
"psubw %%xmm14,%%xmm10\n\t" \
"paddw %%xmm10,%%xmm7\n\t " \
/*SSE2 implementation of the fDCT for x86-64 only.
Because of the 8 extra XMM registers on x86-64, this version can operate
without any temporary stack access at all.*/
void oc_enc_fdct8x8_x86_64sse2(ogg_int16_t _y[64],const ogg_int16_t _x[64]){
ptrdiff_t a;
__asm__ __volatile__(
/*Load the input.*/
"movdqa 0x00(%[x]),%%xmm0\n\t"
"movdqa 0x10(%[x]),%%xmm1\n\t"
"movdqa 0x20(%[x]),%%xmm2\n\t"
"movdqa 0x30(%[x]),%%xmm3\n\t"
"movdqa 0x40(%[x]),%%xmm4\n\t"
"movdqa 0x50(%[x]),%%xmm5\n\t"
"movdqa 0x60(%[x]),%%xmm6\n\t"
"movdqa 0x70(%[x]),%%xmm7\n\t"
/*Add two extra bits of working precision to improve accuracy; any more and
we could overflow.*/
/*We also add a few biases to correct for some systematic error that
remains in the full fDCT->iDCT round trip.*/
/*xmm15={0}x8*/
"pxor %%xmm15,%%xmm15\n\t"
/*xmm14={-1}x8*/
"pcmpeqb %%xmm14,%%xmm14\n\t"
"psllw $2,%%xmm0\n\t"
/*xmm8=xmm0*/
"movdqa %%xmm0,%%xmm8\n\t"
"psllw $2,%%xmm1\n\t"
/*xmm8={_x[7...0]==0}*/
"pcmpeqw %%xmm15,%%xmm8\n\t"
"psllw $2,%%xmm2\n\t"
/*xmm8={_x[7...0]!=0}*/
"psubw %%xmm14,%%xmm8\n\t"
"psllw $2,%%xmm3\n\t"
/*%[a]=1*/
"mov $1,%[a]\n\t"
/*xmm8={_x[6]!=0,0,_x[4]!=0,0,_x[2]!=0,0,_x[0]!=0,0}*/
"pslld $16,%%xmm8\n\t"
"psllw $2,%%xmm4\n\t"
/*xmm9={0,0,0,0,0,0,0,1}*/
"movd %[a],%%xmm9\n\t"
/*xmm8={0,0,_x[2]!=0,0,_x[0]!=0,0}*/
"pshufhw $0x00,%%xmm8,%%xmm8\n\t"
"psllw $2,%%xmm5\n\t"
/*%[a]={1}x2*/
"mov $0x10001,%[a]\n\t"
/*xmm8={0,0,0,0,0,0,0,_x[0]!=0}*/
"pshuflw $0x01,%%xmm8,%%xmm8\n\t"
"psllw $2,%%xmm6\n\t"
/*xmm10={0,0,0,0,0,0,1,1}*/
"movd %[a],%%xmm10\n\t"
/*xmm0=_x[7...0]+{0,0,0,0,0,0,0,_x[0]!=0}*/
"paddw %%xmm8,%%xmm0\n\t"
"psllw $2,%%xmm7\n\t"
/*xmm0=_x[7...0]+{0,0,0,0,0,0,1,(_x[0]!=0)+1}*/
"paddw %%xmm10,%%xmm0\n\t"
/*xmm1=_x[15...8]-{0,0,0,0,0,0,0,1}*/
"psubw %%xmm9,%%xmm1\n\t"
/*Transform columns.*/
OC_FDCT_8x8
/*Transform rows.*/
OC_TRANSPOSE_8x8
OC_FDCT_8x8
/*xmm14={-2,-2,-2,-2,-2,-2,-2,-2}*/
"paddw %%xmm14,%%xmm14\n\t"
"psubw %%xmm14,%%xmm0\n\t"
"psubw %%xmm14,%%xmm1\n\t"
"psraw $2,%%xmm0\n\t"
"psubw %%xmm14,%%xmm2\n\t"
"psraw $2,%%xmm1\n\t"
"psubw %%xmm14,%%xmm3\n\t"
"psraw $2,%%xmm2\n\t"
"psubw %%xmm14,%%xmm4\n\t"
"psraw $2,%%xmm3\n\t"
"psubw %%xmm14,%%xmm5\n\t"
"psraw $2,%%xmm4\n\t"
"psubw %%xmm14,%%xmm6\n\t"
"psraw $2,%%xmm5\n\t"
"psubw %%xmm14,%%xmm7\n\t"
"psraw $2,%%xmm6\n\t"
"psraw $2,%%xmm7\n\t"
/*Transpose, zig-zag, and store the result.*/
/*We could probably do better using SSSE3's palignr, but re-using MMXEXT
version will do for now.*/
#define OC_ZZ_LOAD_ROW_LO(_row,_reg) \
"movdq2q %%xmm"#_row","_reg"\n\t" \
#define OC_ZZ_LOAD_ROW_HI(_row,_reg) \
"punpckhqdq %%xmm"#_row",%%xmm"#_row"\n\t" \
"movdq2q %%xmm"#_row","_reg"\n\t" \
OC_TRANSPOSE_ZIG_ZAG_MMXEXT
#undef OC_ZZ_LOAD_ROW_LO
#undef OC_ZZ_LOAD_ROW_HI
:[a]"=&r"(a)
:[y]"r"(_y),[x]"r"(_x)
:"memory"
);
}
#endif
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