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Diffstat (limited to 'media/libtheora/lib/x86/sse2idct.c')
| -rw-r--r-- | media/libtheora/lib/x86/sse2idct.c | 456 |
1 files changed, 456 insertions, 0 deletions
diff --git a/media/libtheora/lib/x86/sse2idct.c b/media/libtheora/lib/x86/sse2idct.c new file mode 100644 index 0000000000..4597ab074f --- /dev/null +++ b/media/libtheora/lib/x86/sse2idct.c @@ -0,0 +1,456 @@ +/******************************************************************** + * * + * 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) 2002-2009 * + * by the Xiph.Org Foundation and contributors http://www.xiph.org/ * + * * + ******************************************************************** + + function: + last mod: $Id: mmxidct.c 16503 2009-08-22 18:14:02Z giles $ + + ********************************************************************/ + +/*SSE2 acceleration of Theora's iDCT.*/ +#include "x86int.h" +#include "sse2trans.h" +#include "../dct.h" + +#if defined(OC_X86_ASM) + +/*A table of constants used by the MMX routines.*/ +const unsigned short __attribute__((aligned(16),used)) OC_IDCT_CONSTS[64]={ + 8, 8, 8, 8, 8, 8, 8, 8, + OC_C1S7,OC_C1S7,OC_C1S7,OC_C1S7,OC_C1S7,OC_C1S7,OC_C1S7,OC_C1S7, + OC_C2S6,OC_C2S6,OC_C2S6,OC_C2S6,OC_C2S6,OC_C2S6,OC_C2S6,OC_C2S6, + OC_C3S5,OC_C3S5,OC_C3S5,OC_C3S5,OC_C3S5,OC_C3S5,OC_C3S5,OC_C3S5, + OC_C4S4,OC_C4S4,OC_C4S4,OC_C4S4,OC_C4S4,OC_C4S4,OC_C4S4,OC_C4S4, + OC_C5S3,OC_C5S3,OC_C5S3,OC_C5S3,OC_C5S3,OC_C5S3,OC_C5S3,OC_C5S3, + OC_C6S2,OC_C6S2,OC_C6S2,OC_C6S2,OC_C6S2,OC_C6S2,OC_C6S2,OC_C6S2, + OC_C7S1,OC_C7S1,OC_C7S1,OC_C7S1,OC_C7S1,OC_C7S1,OC_C7S1,OC_C7S1 +}; + + +/*Performs the first three stages of the iDCT. + xmm2, xmm6, xmm3, and xmm5 must contain the corresponding rows of the input + (accessed in that order). + The remaining rows must be in _x at their corresponding locations. + On output, xmm7 down to xmm4 contain rows 0 through 3, and xmm0 up to xmm3 + contain rows 4 through 7.*/ +#define OC_IDCT_8x8_ABC(_x) \ + "#OC_IDCT_8x8_ABC\n\t" \ + /*Stage 1:*/ \ + /*2-3 rotation by 6pi/16. \ + xmm4=xmm7=C6, xmm0=xmm1=C2, xmm2=X2, xmm6=X6.*/ \ + "movdqa "OC_MEM_OFFS(0x20,c)",%%xmm1\n\t" \ + "movdqa "OC_MEM_OFFS(0x60,c)",%%xmm4\n\t" \ + "movdqa %%xmm1,%%xmm0\n\t" \ + "pmulhw %%xmm2,%%xmm1\n\t" \ + "movdqa %%xmm4,%%xmm7\n\t" \ + "pmulhw %%xmm6,%%xmm0\n\t" \ + "pmulhw %%xmm2,%%xmm7\n\t" \ + "pmulhw %%xmm6,%%xmm4\n\t" \ + "paddw %%xmm6,%%xmm0\n\t" \ + "movdqa "OC_MEM_OFFS(0x30,c)",%%xmm6\n\t" \ + "paddw %%xmm1,%%xmm2\n\t" \ + "psubw %%xmm0,%%xmm7\n\t" \ + "movdqa %%xmm7,"OC_MEM_OFFS(0x00,buf)"\n\t" \ + "paddw %%xmm4,%%xmm2\n\t" \ + "movdqa "OC_MEM_OFFS(0x50,c)",%%xmm4\n\t" \ + "movdqa %%xmm2,"OC_MEM_OFFS(0x10,buf)"\n\t" \ + /*5-6 rotation by 3pi/16. \ + xmm4=xmm2=C5, xmm1=xmm6=C3, xmm3=X3, xmm5=X5.*/ \ + "movdqa %%xmm4,%%xmm2\n\t" \ + "movdqa %%xmm6,%%xmm1\n\t" \ + "pmulhw %%xmm3,%%xmm4\n\t" \ + "pmulhw %%xmm5,%%xmm1\n\t" \ + "pmulhw %%xmm3,%%xmm6\n\t" \ + "pmulhw %%xmm5,%%xmm2\n\t" \ + "paddw %%xmm3,%%xmm4\n\t" \ + "paddw %%xmm5,%%xmm3\n\t" \ + "paddw %%xmm6,%%xmm3\n\t" \ + "movdqa "OC_MEM_OFFS(0x70,_x)",%%xmm6\n\t" \ + "paddw %%xmm5,%%xmm1\n\t" \ + "movdqa "OC_MEM_OFFS(0x10,_x)",%%xmm5\n\t" \ + "paddw %%xmm3,%%xmm2\n\t" \ + "movdqa "OC_MEM_OFFS(0x70,c)",%%xmm3\n\t" \ + "psubw %%xmm4,%%xmm1\n\t" \ + "movdqa "OC_MEM_OFFS(0x10,c)",%%xmm4\n\t" \ + /*4-7 rotation by 7pi/16. \ + xmm4=xmm7=C1, xmm3=xmm0=C7, xmm5=X1, xmm6=X7.*/ \ + "movdqa %%xmm3,%%xmm0\n\t" \ + "movdqa %%xmm4,%%xmm7\n\t" \ + "pmulhw %%xmm5,%%xmm3\n\t" \ + "pmulhw %%xmm5,%%xmm7\n\t" \ + "pmulhw %%xmm6,%%xmm4\n\t" \ + "pmulhw %%xmm6,%%xmm0\n\t" \ + "paddw %%xmm6,%%xmm4\n\t" \ + "movdqa "OC_MEM_OFFS(0x40,_x)",%%xmm6\n\t" \ + "paddw %%xmm5,%%xmm7\n\t" \ + "psubw %%xmm4,%%xmm3\n\t" \ + "movdqa "OC_MEM_OFFS(0x40,c)",%%xmm4\n\t" \ + "paddw %%xmm7,%%xmm0\n\t" \ + "movdqa "OC_MEM_OFFS(0x00,_x)",%%xmm7\n\t" \ + /*0-1 butterfly. \ + xmm4=xmm5=C4, xmm7=X0, xmm6=X4.*/ \ + "paddw %%xmm7,%%xmm6\n\t" \ + "movdqa %%xmm4,%%xmm5\n\t" \ + "pmulhw %%xmm6,%%xmm4\n\t" \ + "paddw %%xmm7,%%xmm7\n\t" \ + "psubw %%xmm6,%%xmm7\n\t" \ + "paddw %%xmm6,%%xmm4\n\t" \ + /*Stage 2:*/ \ + /*4-5 butterfly: xmm3=t[4], xmm1=t[5] \ + 7-6 butterfly: xmm2=t[6], xmm0=t[7]*/ \ + "movdqa %%xmm3,%%xmm6\n\t" \ + "paddw %%xmm1,%%xmm3\n\t" \ + "psubw %%xmm1,%%xmm6\n\t" \ + "movdqa %%xmm5,%%xmm1\n\t" \ + "pmulhw %%xmm7,%%xmm5\n\t" \ + "paddw %%xmm7,%%xmm5\n\t" \ + "movdqa %%xmm0,%%xmm7\n\t" \ + "paddw %%xmm2,%%xmm0\n\t" \ + "psubw %%xmm2,%%xmm7\n\t" \ + "movdqa %%xmm1,%%xmm2\n\t" \ + "pmulhw %%xmm6,%%xmm1\n\t" \ + "pmulhw %%xmm7,%%xmm2\n\t" \ + "paddw %%xmm6,%%xmm1\n\t" \ + "movdqa "OC_MEM_OFFS(0x00,buf)",%%xmm6\n\t" \ + "paddw %%xmm7,%%xmm2\n\t" \ + "movdqa "OC_MEM_OFFS(0x10,buf)",%%xmm7\n\t" \ + /*Stage 3: \ + 6-5 butterfly: xmm1=t[5], xmm2=t[6] -> xmm1=t[6]+t[5], xmm2=t[6]-t[5] \ + 0-3 butterfly: xmm4=t[0], xmm7=t[3] -> xmm7=t[0]+t[3], xmm4=t[0]-t[3] \ + 1-2 butterfly: xmm5=t[1], xmm6=t[2] -> xmm6=t[1]+t[2], xmm5=t[1]-t[2]*/ \ + "paddw %%xmm2,%%xmm1\n\t" \ + "paddw %%xmm5,%%xmm6\n\t" \ + "paddw %%xmm4,%%xmm7\n\t" \ + "paddw %%xmm2,%%xmm2\n\t" \ + "paddw %%xmm4,%%xmm4\n\t" \ + "paddw %%xmm5,%%xmm5\n\t" \ + "psubw %%xmm1,%%xmm2\n\t" \ + "psubw %%xmm7,%%xmm4\n\t" \ + "psubw %%xmm6,%%xmm5\n\t" \ + +/*Performs the last stage of the iDCT. + On input, xmm7 down to xmm4 contain rows 0 through 3, and xmm0 up to xmm3 + contain rows 4 through 7. + On output, xmm0 through xmm7 contain the corresponding rows.*/ +#define OC_IDCT_8x8_D \ + "#OC_IDCT_8x8_D\n\t" \ + /*Stage 4: \ + 0-7 butterfly: xmm7=t[0], xmm0=t[7] -> xmm0=t[0]+t[7], xmm7=t[0]-t[7] \ + 1-6 butterfly: xmm6=t[1], xmm1=t[6] -> xmm1=t[1]+t[6], xmm6=t[1]-t[6] \ + 2-5 butterfly: xmm5=t[2], xmm2=t[5] -> xmm2=t[2]+t[5], xmm5=t[2]-t[5] \ + 3-4 butterfly: xmm4=t[3], xmm3=t[4] -> xmm3=t[3]+t[4], xmm4=t[3]-t[4]*/ \ + "psubw %%xmm0,%%xmm7\n\t" \ + "psubw %%xmm1,%%xmm6\n\t" \ + "psubw %%xmm2,%%xmm5\n\t" \ + "psubw %%xmm3,%%xmm4\n\t" \ + "paddw %%xmm0,%%xmm0\n\t" \ + "paddw %%xmm1,%%xmm1\n\t" \ + "paddw %%xmm2,%%xmm2\n\t" \ + "paddw %%xmm3,%%xmm3\n\t" \ + "paddw %%xmm7,%%xmm0\n\t" \ + "paddw %%xmm6,%%xmm1\n\t" \ + "paddw %%xmm5,%%xmm2\n\t" \ + "paddw %%xmm4,%%xmm3\n\t" \ + +/*Performs the last stage of the iDCT. + On input, xmm7 down to xmm4 contain rows 0 through 3, and xmm0 up to xmm3 + contain rows 4 through 7. + On output, xmm0 through xmm7 contain the corresponding rows.*/ +#define OC_IDCT_8x8_D_STORE \ + "#OC_IDCT_8x8_D_STORE\n\t" \ + /*Stage 4: \ + 0-7 butterfly: xmm7=t[0], xmm0=t[7] -> xmm0=t[0]+t[7], xmm7=t[0]-t[7] \ + 1-6 butterfly: xmm6=t[1], xmm1=t[6] -> xmm1=t[1]+t[6], xmm6=t[1]-t[6] \ + 2-5 butterfly: xmm5=t[2], xmm2=t[5] -> xmm2=t[2]+t[5], xmm5=t[2]-t[5] \ + 3-4 butterfly: xmm4=t[3], xmm3=t[4] -> xmm3=t[3]+t[4], xmm4=t[3]-t[4]*/ \ + "psubw %%xmm3,%%xmm4\n\t" \ + "movdqa %%xmm4,"OC_MEM_OFFS(0x40,y)"\n\t" \ + "movdqa "OC_MEM_OFFS(0x00,c)",%%xmm4\n\t" \ + "psubw %%xmm0,%%xmm7\n\t" \ + "psubw %%xmm1,%%xmm6\n\t" \ + "psubw %%xmm2,%%xmm5\n\t" \ + "paddw %%xmm4,%%xmm7\n\t" \ + "paddw %%xmm4,%%xmm6\n\t" \ + "paddw %%xmm4,%%xmm5\n\t" \ + "paddw "OC_MEM_OFFS(0x40,y)",%%xmm4\n\t" \ + "paddw %%xmm0,%%xmm0\n\t" \ + "paddw %%xmm1,%%xmm1\n\t" \ + "paddw %%xmm2,%%xmm2\n\t" \ + "paddw %%xmm3,%%xmm3\n\t" \ + "paddw %%xmm7,%%xmm0\n\t" \ + "paddw %%xmm6,%%xmm1\n\t" \ + "psraw $4,%%xmm0\n\t" \ + "paddw %%xmm5,%%xmm2\n\t" \ + "movdqa %%xmm0,"OC_MEM_OFFS(0x00,y)"\n\t" \ + "psraw $4,%%xmm1\n\t" \ + "paddw %%xmm4,%%xmm3\n\t" \ + "movdqa %%xmm1,"OC_MEM_OFFS(0x10,y)"\n\t" \ + "psraw $4,%%xmm2\n\t" \ + "movdqa %%xmm2,"OC_MEM_OFFS(0x20,y)"\n\t" \ + "psraw $4,%%xmm3\n\t" \ + "movdqa %%xmm3,"OC_MEM_OFFS(0x30,y)"\n\t" \ + "psraw $4,%%xmm4\n\t" \ + "movdqa %%xmm4,"OC_MEM_OFFS(0x40,y)"\n\t" \ + "psraw $4,%%xmm5\n\t" \ + "movdqa %%xmm5,"OC_MEM_OFFS(0x50,y)"\n\t" \ + "psraw $4,%%xmm6\n\t" \ + "movdqa %%xmm6,"OC_MEM_OFFS(0x60,y)"\n\t" \ + "psraw $4,%%xmm7\n\t" \ + "movdqa %%xmm7,"OC_MEM_OFFS(0x70,y)"\n\t" \ + +static void oc_idct8x8_slow_sse2(ogg_int16_t _y[64],ogg_int16_t _x[64]){ + OC_ALIGN16(ogg_int16_t buf[16]); + int i; + /*This routine accepts an 8x8 matrix pre-transposed.*/ + __asm__ __volatile__( + /*Load rows 2, 3, 5, and 6 for the first stage of the iDCT.*/ + "movdqa "OC_MEM_OFFS(0x20,x)",%%xmm2\n\t" + "movdqa "OC_MEM_OFFS(0x60,x)",%%xmm6\n\t" + "movdqa "OC_MEM_OFFS(0x30,x)",%%xmm3\n\t" + "movdqa "OC_MEM_OFFS(0x50,x)",%%xmm5\n\t" + OC_IDCT_8x8_ABC(x) + OC_IDCT_8x8_D + OC_TRANSPOSE_8x8 + /*Clear out rows 0, 1, 4, and 7 for the first stage of the iDCT.*/ + "movdqa %%xmm7,"OC_MEM_OFFS(0x70,y)"\n\t" + "movdqa %%xmm4,"OC_MEM_OFFS(0x40,y)"\n\t" + "movdqa %%xmm1,"OC_MEM_OFFS(0x10,y)"\n\t" + "movdqa %%xmm0,"OC_MEM_OFFS(0x00,y)"\n\t" + OC_IDCT_8x8_ABC(y) + OC_IDCT_8x8_D_STORE + :[buf]"=m"(OC_ARRAY_OPERAND(ogg_int16_t,buf,16)), + [y]"=m"(OC_ARRAY_OPERAND(ogg_int16_t,_y,64)) + :[x]"m"(OC_CONST_ARRAY_OPERAND(ogg_int16_t,_x,64)), + [c]"m"(OC_CONST_ARRAY_OPERAND(ogg_int16_t,OC_IDCT_CONSTS,128)) + ); + __asm__ __volatile__("pxor %%xmm0,%%xmm0\n\t"::); + /*Clear input data for next block (decoder only).*/ + for(i=0;i<2;i++){ + __asm__ __volatile__( + "movdqa %%xmm0,"OC_MEM_OFFS(0x00,x)"\n\t" + "movdqa %%xmm0,"OC_MEM_OFFS(0x10,x)"\n\t" + "movdqa %%xmm0,"OC_MEM_OFFS(0x20,x)"\n\t" + "movdqa %%xmm0,"OC_MEM_OFFS(0x30,x)"\n\t" + :[x]"=m"(OC_ARRAY_OPERAND(ogg_int16_t,_x+i*32,32)) + ); + } +} + +/*For the first step of the 10-coefficient version of the 8x8 iDCT, we only + need to work with four columns at a time. + Doing this in MMX is faster on processors with a 64-bit data path.*/ +#define OC_IDCT_8x8_10_MMX \ + "#OC_IDCT_8x8_10_MMX\n\t" \ + /*Stage 1:*/ \ + /*2-3 rotation by 6pi/16. \ + mm7=C6, mm6=C2, mm2=X2, X6=0.*/ \ + "movq "OC_MEM_OFFS(0x60,c)",%%mm7\n\t" \ + "movq "OC_MEM_OFFS(0x20,c)",%%mm6\n\t" \ + "pmulhw %%mm2,%%mm6\n\t" \ + "pmulhw %%mm2,%%mm7\n\t" \ + "movq "OC_MEM_OFFS(0x50,c)",%%mm5\n\t" \ + "paddw %%mm6,%%mm2\n\t" \ + "movq %%mm2,"OC_MEM_OFFS(0x10,buf)"\n\t" \ + "movq "OC_MEM_OFFS(0x30,c)",%%mm2\n\t" \ + "movq %%mm7,"OC_MEM_OFFS(0x00,buf)"\n\t" \ + /*5-6 rotation by 3pi/16. \ + mm5=C5, mm2=C3, mm3=X3, X5=0.*/ \ + "pmulhw %%mm3,%%mm5\n\t" \ + "pmulhw %%mm3,%%mm2\n\t" \ + "movq "OC_MEM_OFFS(0x10,c)",%%mm7\n\t" \ + "paddw %%mm3,%%mm5\n\t" \ + "paddw %%mm3,%%mm2\n\t" \ + "movq "OC_MEM_OFFS(0x70,c)",%%mm3\n\t" \ + /*4-7 rotation by 7pi/16. \ + mm7=C1, mm3=C7, mm1=X1, X7=0.*/ \ + "pmulhw %%mm1,%%mm3\n\t" \ + "pmulhw %%mm1,%%mm7\n\t" \ + "movq "OC_MEM_OFFS(0x40,c)",%%mm4\n\t" \ + "movq %%mm3,%%mm6\n\t" \ + "paddw %%mm1,%%mm7\n\t" \ + /*0-1 butterfly. \ + mm4=C4, mm0=X0, X4=0.*/ \ + /*Stage 2:*/ \ + /*4-5 butterfly: mm3=t[4], mm5=t[5] \ + 7-6 butterfly: mm2=t[6], mm7=t[7]*/ \ + "psubw %%mm5,%%mm3\n\t" \ + "paddw %%mm5,%%mm6\n\t" \ + "movq %%mm4,%%mm1\n\t" \ + "pmulhw %%mm0,%%mm4\n\t" \ + "paddw %%mm0,%%mm4\n\t" \ + "movq %%mm7,%%mm0\n\t" \ + "movq %%mm4,%%mm5\n\t" \ + "paddw %%mm2,%%mm0\n\t" \ + "psubw %%mm2,%%mm7\n\t" \ + "movq %%mm1,%%mm2\n\t" \ + "pmulhw %%mm6,%%mm1\n\t" \ + "pmulhw %%mm7,%%mm2\n\t" \ + "paddw %%mm6,%%mm1\n\t" \ + "movq "OC_MEM_OFFS(0x00,buf)",%%mm6\n\t" \ + "paddw %%mm7,%%mm2\n\t" \ + "movq "OC_MEM_OFFS(0x10,buf)",%%mm7\n\t" \ + /*Stage 3: \ + 6-5 butterfly: mm1=t[5], mm2=t[6] -> mm1=t[6]+t[5], mm2=t[6]-t[5] \ + 0-3 butterfly: mm4=t[0], mm7=t[3] -> mm7=t[0]+t[3], mm4=t[0]-t[3] \ + 1-2 butterfly: mm5=t[1], mm6=t[2] -> mm6=t[1]+t[2], mm5=t[1]-t[2]*/ \ + "paddw %%mm2,%%mm1\n\t" \ + "paddw %%mm5,%%mm6\n\t" \ + "paddw %%mm4,%%mm7\n\t" \ + "paddw %%mm2,%%mm2\n\t" \ + "paddw %%mm4,%%mm4\n\t" \ + "paddw %%mm5,%%mm5\n\t" \ + "psubw %%mm1,%%mm2\n\t" \ + "psubw %%mm7,%%mm4\n\t" \ + "psubw %%mm6,%%mm5\n\t" \ + /*Stage 4: \ + 0-7 butterfly: mm7=t[0], mm0=t[7] -> mm0=t[0]+t[7], mm7=t[0]-t[7] \ + 1-6 butterfly: mm6=t[1], mm1=t[6] -> mm1=t[1]+t[6], mm6=t[1]-t[6] \ + 2-5 butterfly: mm5=t[2], mm2=t[5] -> mm2=t[2]+t[5], mm5=t[2]-t[5] \ + 3-4 butterfly: mm4=t[3], mm3=t[4] -> mm3=t[3]+t[4], mm4=t[3]-t[4]*/ \ + "psubw %%mm0,%%mm7\n\t" \ + "psubw %%mm1,%%mm6\n\t" \ + "psubw %%mm2,%%mm5\n\t" \ + "psubw %%mm3,%%mm4\n\t" \ + "paddw %%mm0,%%mm0\n\t" \ + "paddw %%mm1,%%mm1\n\t" \ + "paddw %%mm2,%%mm2\n\t" \ + "paddw %%mm3,%%mm3\n\t" \ + "paddw %%mm7,%%mm0\n\t" \ + "paddw %%mm6,%%mm1\n\t" \ + "paddw %%mm5,%%mm2\n\t" \ + "paddw %%mm4,%%mm3\n\t" \ + +#define OC_IDCT_8x8_10_ABC \ + "#OC_IDCT_8x8_10_ABC\n\t" \ + /*Stage 1:*/ \ + /*2-3 rotation by 6pi/16. \ + xmm7=C6, xmm6=C2, xmm2=X2, X6=0.*/ \ + "movdqa "OC_MEM_OFFS(0x60,c)",%%xmm7\n\t" \ + "movdqa "OC_MEM_OFFS(0x20,c)",%%xmm6\n\t" \ + "pmulhw %%xmm2,%%xmm6\n\t" \ + "pmulhw %%xmm2,%%xmm7\n\t" \ + "movdqa "OC_MEM_OFFS(0x50,c)",%%xmm5\n\t" \ + "paddw %%xmm6,%%xmm2\n\t" \ + "movdqa %%xmm2,"OC_MEM_OFFS(0x10,buf)"\n\t" \ + "movdqa "OC_MEM_OFFS(0x30,c)",%%xmm2\n\t" \ + "movdqa %%xmm7,"OC_MEM_OFFS(0x00,buf)"\n\t" \ + /*5-6 rotation by 3pi/16. \ + xmm5=C5, xmm2=C3, xmm3=X3, X5=0.*/ \ + "pmulhw %%xmm3,%%xmm5\n\t" \ + "pmulhw %%xmm3,%%xmm2\n\t" \ + "movdqa "OC_MEM_OFFS(0x10,c)",%%xmm7\n\t" \ + "paddw %%xmm3,%%xmm5\n\t" \ + "paddw %%xmm3,%%xmm2\n\t" \ + "movdqa "OC_MEM_OFFS(0x70,c)",%%xmm3\n\t" \ + /*4-7 rotation by 7pi/16. \ + xmm7=C1, xmm3=C7, xmm1=X1, X7=0.*/ \ + "pmulhw %%xmm1,%%xmm3\n\t" \ + "pmulhw %%xmm1,%%xmm7\n\t" \ + "movdqa "OC_MEM_OFFS(0x40,c)",%%xmm4\n\t" \ + "movdqa %%xmm3,%%xmm6\n\t" \ + "paddw %%xmm1,%%xmm7\n\t" \ + /*0-1 butterfly. \ + xmm4=C4, xmm0=X0, X4=0.*/ \ + /*Stage 2:*/ \ + /*4-5 butterfly: xmm3=t[4], xmm5=t[5] \ + 7-6 butterfly: xmm2=t[6], xmm7=t[7]*/ \ + "psubw %%xmm5,%%xmm3\n\t" \ + "paddw %%xmm5,%%xmm6\n\t" \ + "movdqa %%xmm4,%%xmm1\n\t" \ + "pmulhw %%xmm0,%%xmm4\n\t" \ + "paddw %%xmm0,%%xmm4\n\t" \ + "movdqa %%xmm7,%%xmm0\n\t" \ + "movdqa %%xmm4,%%xmm5\n\t" \ + "paddw %%xmm2,%%xmm0\n\t" \ + "psubw %%xmm2,%%xmm7\n\t" \ + "movdqa %%xmm1,%%xmm2\n\t" \ + "pmulhw %%xmm6,%%xmm1\n\t" \ + "pmulhw %%xmm7,%%xmm2\n\t" \ + "paddw %%xmm6,%%xmm1\n\t" \ + "movdqa "OC_MEM_OFFS(0x00,buf)",%%xmm6\n\t" \ + "paddw %%xmm7,%%xmm2\n\t" \ + "movdqa "OC_MEM_OFFS(0x10,buf)",%%xmm7\n\t" \ + /*Stage 3: \ + 6-5 butterfly: xmm1=t[5], xmm2=t[6] -> xmm1=t[6]+t[5], xmm2=t[6]-t[5] \ + 0-3 butterfly: xmm4=t[0], xmm7=t[3] -> xmm7=t[0]+t[3], xmm4=t[0]-t[3] \ + 1-2 butterfly: xmm5=t[1], xmm6=t[2] -> xmm6=t[1]+t[2], xmm5=t[1]-t[2]*/ \ + "paddw %%xmm2,%%xmm1\n\t" \ + "paddw %%xmm5,%%xmm6\n\t" \ + "paddw %%xmm4,%%xmm7\n\t" \ + "paddw %%xmm2,%%xmm2\n\t" \ + "paddw %%xmm4,%%xmm4\n\t" \ + "paddw %%xmm5,%%xmm5\n\t" \ + "psubw %%xmm1,%%xmm2\n\t" \ + "psubw %%xmm7,%%xmm4\n\t" \ + "psubw %%xmm6,%%xmm5\n\t" \ + +static void oc_idct8x8_10_sse2(ogg_int16_t _y[64],ogg_int16_t _x[64]){ + OC_ALIGN16(ogg_int16_t buf[16]); + /*This routine accepts an 8x8 matrix pre-transposed.*/ + __asm__ __volatile__( + "movq "OC_MEM_OFFS(0x20,x)",%%mm2\n\t" + "movq "OC_MEM_OFFS(0x30,x)",%%mm3\n\t" + "movq "OC_MEM_OFFS(0x10,x)",%%mm1\n\t" + "movq "OC_MEM_OFFS(0x00,x)",%%mm0\n\t" + OC_IDCT_8x8_10_MMX + OC_TRANSPOSE_8x4_MMX2SSE + OC_IDCT_8x8_10_ABC + OC_IDCT_8x8_D_STORE + :[buf]"=m"(OC_ARRAY_OPERAND(short,buf,16)), + [y]"=m"(OC_ARRAY_OPERAND(ogg_int16_t,_y,64)) + :[x]"m"OC_CONST_ARRAY_OPERAND(ogg_int16_t,_x,64), + [c]"m"(OC_CONST_ARRAY_OPERAND(ogg_int16_t,OC_IDCT_CONSTS,128)) + ); + /*Clear input data for next block (decoder only).*/ + __asm__ __volatile__( + "pxor %%mm0,%%mm0\n\t" + "movq %%mm0,"OC_MEM_OFFS(0x00,x)"\n\t" + "movq %%mm0,"OC_MEM_OFFS(0x10,x)"\n\t" + "movq %%mm0,"OC_MEM_OFFS(0x20,x)"\n\t" + "movq %%mm0,"OC_MEM_OFFS(0x30,x)"\n\t" + :[x]"+m"(OC_ARRAY_OPERAND(ogg_int16_t,_x,28)) + ); +} + +/*Performs an inverse 8x8 Type-II DCT transform. + The input is assumed to be scaled by a factor of 4 relative to orthonormal + version of the transform.*/ +void oc_idct8x8_sse2(ogg_int16_t _y[64],ogg_int16_t _x[64],int _last_zzi){ + /*_last_zzi is subtly different from an actual count of the number of + coefficients we decoded for this block. + It contains the value of zzi BEFORE the final token in the block was + decoded. + In most cases this is an EOB token (the continuation of an EOB run from a + previous block counts), and so this is the same as the coefficient count. + However, in the case that the last token was NOT an EOB token, but filled + the block up with exactly 64 coefficients, _last_zzi will be less than 64. + Provided the last token was not a pure zero run, the minimum value it can + be is 46, and so that doesn't affect any of the cases in this routine. + However, if the last token WAS a pure zero run of length 63, then _last_zzi + will be 1 while the number of coefficients decoded is 64. + Thus, we will trigger the following special case, where the real + coefficient count would not. + Note also that a zero run of length 64 will give _last_zzi a value of 0, + but we still process the DC coefficient, which might have a non-zero value + due to DC prediction. + Although convoluted, this is arguably the correct behavior: it allows us to + use a smaller transform when the block ends with a long zero run instead + of a normal EOB token. + It could be smarter... multiple separate zero runs at the end of a block + will fool it, but an encoder that generates these really deserves what it + gets. + Needless to say we inherited this approach from VP3.*/ + /*Then perform the iDCT.*/ + if(_last_zzi<=10)oc_idct8x8_10_sse2(_y,_x); + else oc_idct8x8_slow_sse2(_y,_x); +} + +#endif |