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Diffstat (limited to 'media/libtheora/lib/x86/mmxidct.c')
-rw-r--r-- | media/libtheora/lib/x86/mmxidct.c | 558 |
1 files changed, 558 insertions, 0 deletions
diff --git a/media/libtheora/lib/x86/mmxidct.c b/media/libtheora/lib/x86/mmxidct.c new file mode 100644 index 0000000000..b8e3077066 --- /dev/null +++ b/media/libtheora/lib/x86/mmxidct.c @@ -0,0 +1,558 @@ +/******************************************************************** + * * + * 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: $Id$ + + ********************************************************************/ + +/*MMX acceleration of Theora's iDCT. + Originally written by Rudolf Marek, based on code from On2's VP3.*/ +#include "x86int.h" +#include "../dct.h" + +#if defined(OC_X86_ASM) + +/*These are offsets into the table of constants below.*/ +/*7 rows of cosines, in order: pi/16 * (1 ... 7).*/ +#define OC_COSINE_OFFSET (0) +/*A row of 8's.*/ +#define OC_EIGHT_OFFSET (56) + + + +/*38 cycles*/ +#define OC_IDCT_BEGIN(_y,_x) \ + "#OC_IDCT_BEGIN\n\t" \ + "movq "OC_I(3,_x)",%%mm2\n\t" \ + "movq "OC_MEM_OFFS(0x30,c)",%%mm6\n\t" \ + "movq %%mm2,%%mm4\n\t" \ + "movq "OC_J(5,_x)",%%mm7\n\t" \ + "pmulhw %%mm6,%%mm4\n\t" \ + "movq "OC_MEM_OFFS(0x50,c)",%%mm1\n\t" \ + "pmulhw %%mm7,%%mm6\n\t" \ + "movq %%mm1,%%mm5\n\t" \ + "pmulhw %%mm2,%%mm1\n\t" \ + "movq "OC_I(1,_x)",%%mm3\n\t" \ + "pmulhw %%mm7,%%mm5\n\t" \ + "movq "OC_MEM_OFFS(0x10,c)",%%mm0\n\t" \ + "paddw %%mm2,%%mm4\n\t" \ + "paddw %%mm7,%%mm6\n\t" \ + "paddw %%mm1,%%mm2\n\t" \ + "movq "OC_J(7,_x)",%%mm1\n\t" \ + "paddw %%mm5,%%mm7\n\t" \ + "movq %%mm0,%%mm5\n\t" \ + "pmulhw %%mm3,%%mm0\n\t" \ + "paddw %%mm7,%%mm4\n\t" \ + "pmulhw %%mm1,%%mm5\n\t" \ + "movq "OC_MEM_OFFS(0x70,c)",%%mm7\n\t" \ + "psubw %%mm2,%%mm6\n\t" \ + "paddw %%mm3,%%mm0\n\t" \ + "pmulhw %%mm7,%%mm3\n\t" \ + "movq "OC_I(2,_x)",%%mm2\n\t" \ + "pmulhw %%mm1,%%mm7\n\t" \ + "paddw %%mm1,%%mm5\n\t" \ + "movq %%mm2,%%mm1\n\t" \ + "pmulhw "OC_MEM_OFFS(0x20,c)",%%mm2\n\t" \ + "psubw %%mm5,%%mm3\n\t" \ + "movq "OC_J(6,_x)",%%mm5\n\t" \ + "paddw %%mm7,%%mm0\n\t" \ + "movq %%mm5,%%mm7\n\t" \ + "psubw %%mm4,%%mm0\n\t" \ + "pmulhw "OC_MEM_OFFS(0x20,c)",%%mm5\n\t" \ + "paddw %%mm1,%%mm2\n\t" \ + "pmulhw "OC_MEM_OFFS(0x60,c)",%%mm1\n\t" \ + "paddw %%mm4,%%mm4\n\t" \ + "paddw %%mm0,%%mm4\n\t" \ + "psubw %%mm6,%%mm3\n\t" \ + "paddw %%mm7,%%mm5\n\t" \ + "paddw %%mm6,%%mm6\n\t" \ + "pmulhw "OC_MEM_OFFS(0x60,c)",%%mm7\n\t" \ + "paddw %%mm3,%%mm6\n\t" \ + "movq %%mm4,"OC_I(1,_y)"\n\t" \ + "psubw %%mm5,%%mm1\n\t" \ + "movq "OC_MEM_OFFS(0x40,c)",%%mm4\n\t" \ + "movq %%mm3,%%mm5\n\t" \ + "pmulhw %%mm4,%%mm3\n\t" \ + "paddw %%mm2,%%mm7\n\t" \ + "movq %%mm6,"OC_I(2,_y)"\n\t" \ + "movq %%mm0,%%mm2\n\t" \ + "movq "OC_I(0,_x)",%%mm6\n\t" \ + "pmulhw %%mm4,%%mm0\n\t" \ + "paddw %%mm3,%%mm5\n\t" \ + "movq "OC_J(4,_x)",%%mm3\n\t" \ + "psubw %%mm1,%%mm5\n\t" \ + "paddw %%mm0,%%mm2\n\t" \ + "psubw %%mm3,%%mm6\n\t" \ + "movq %%mm6,%%mm0\n\t" \ + "pmulhw %%mm4,%%mm6\n\t" \ + "paddw %%mm3,%%mm3\n\t" \ + "paddw %%mm1,%%mm1\n\t" \ + "paddw %%mm0,%%mm3\n\t" \ + "paddw %%mm5,%%mm1\n\t" \ + "pmulhw %%mm3,%%mm4\n\t" \ + "paddw %%mm0,%%mm6\n\t" \ + "psubw %%mm2,%%mm6\n\t" \ + "paddw %%mm2,%%mm2\n\t" \ + "movq "OC_I(1,_y)",%%mm0\n\t" \ + "paddw %%mm6,%%mm2\n\t" \ + "paddw %%mm3,%%mm4\n\t" \ + "psubw %%mm1,%%mm2\n\t" \ + "#end OC_IDCT_BEGIN\n\t" \ + +/*38+8=46 cycles.*/ +#define OC_ROW_IDCT(_y,_x) \ + "#OC_ROW_IDCT\n" \ + OC_IDCT_BEGIN(_y,_x) \ + /*r3=D'*/ \ + "movq "OC_I(2,_y)",%%mm3\n\t" \ + /*r4=E'=E-G*/ \ + "psubw %%mm7,%%mm4\n\t" \ + /*r1=H'+H'*/ \ + "paddw %%mm1,%%mm1\n\t" \ + /*r7=G+G*/ \ + "paddw %%mm7,%%mm7\n\t" \ + /*r1=R1=A''+H'*/ \ + "paddw %%mm2,%%mm1\n\t" \ + /*r7=G'=E+G*/ \ + "paddw %%mm4,%%mm7\n\t" \ + /*r4=R4=E'-D'*/ \ + "psubw %%mm3,%%mm4\n\t" \ + "paddw %%mm3,%%mm3\n\t" \ + /*r6=R6=F'-B''*/ \ + "psubw %%mm5,%%mm6\n\t" \ + "paddw %%mm5,%%mm5\n\t" \ + /*r3=R3=E'+D'*/ \ + "paddw %%mm4,%%mm3\n\t" \ + /*r5=R5=F'+B''*/ \ + "paddw %%mm6,%%mm5\n\t" \ + /*r7=R7=G'-C'*/ \ + "psubw %%mm0,%%mm7\n\t" \ + "paddw %%mm0,%%mm0\n\t" \ + /*Save R1.*/ \ + "movq %%mm1,"OC_I(1,_y)"\n\t" \ + /*r0=R0=G.+C.*/ \ + "paddw %%mm7,%%mm0\n\t" \ + "#end OC_ROW_IDCT\n\t" \ + +/*The following macro does two 4x4 transposes in place. + At entry, we assume: + r0 = a3 a2 a1 a0 + I(1) = b3 b2 b1 b0 + r2 = c3 c2 c1 c0 + r3 = d3 d2 d1 d0 + + r4 = e3 e2 e1 e0 + r5 = f3 f2 f1 f0 + r6 = g3 g2 g1 g0 + r7 = h3 h2 h1 h0 + + At exit, we have: + I(0) = d0 c0 b0 a0 + I(1) = d1 c1 b1 a1 + I(2) = d2 c2 b2 a2 + I(3) = d3 c3 b3 a3 + + J(4) = h0 g0 f0 e0 + J(5) = h1 g1 f1 e1 + J(6) = h2 g2 f2 e2 + J(7) = h3 g3 f3 e3 + + I(0) I(1) I(2) I(3) is the transpose of r0 I(1) r2 r3. + J(4) J(5) J(6) J(7) is the transpose of r4 r5 r6 r7. + + Since r1 is free at entry, we calculate the Js first.*/ +/*19 cycles.*/ +#define OC_TRANSPOSE(_y) \ + "#OC_TRANSPOSE\n\t" \ + "movq %%mm4,%%mm1\n\t" \ + "punpcklwd %%mm5,%%mm4\n\t" \ + "movq %%mm0,"OC_I(0,_y)"\n\t" \ + "punpckhwd %%mm5,%%mm1\n\t" \ + "movq %%mm6,%%mm0\n\t" \ + "punpcklwd %%mm7,%%mm6\n\t" \ + "movq %%mm4,%%mm5\n\t" \ + "punpckldq %%mm6,%%mm4\n\t" \ + "punpckhdq %%mm6,%%mm5\n\t" \ + "movq %%mm1,%%mm6\n\t" \ + "movq %%mm4,"OC_J(4,_y)"\n\t" \ + "punpckhwd %%mm7,%%mm0\n\t" \ + "movq %%mm5,"OC_J(5,_y)"\n\t" \ + "punpckhdq %%mm0,%%mm6\n\t" \ + "movq "OC_I(0,_y)",%%mm4\n\t" \ + "punpckldq %%mm0,%%mm1\n\t" \ + "movq "OC_I(1,_y)",%%mm5\n\t" \ + "movq %%mm4,%%mm0\n\t" \ + "movq %%mm6,"OC_J(7,_y)"\n\t" \ + "punpcklwd %%mm5,%%mm0\n\t" \ + "movq %%mm1,"OC_J(6,_y)"\n\t" \ + "punpckhwd %%mm5,%%mm4\n\t" \ + "movq %%mm2,%%mm5\n\t" \ + "punpcklwd %%mm3,%%mm2\n\t" \ + "movq %%mm0,%%mm1\n\t" \ + "punpckldq %%mm2,%%mm0\n\t" \ + "punpckhdq %%mm2,%%mm1\n\t" \ + "movq %%mm4,%%mm2\n\t" \ + "movq %%mm0,"OC_I(0,_y)"\n\t" \ + "punpckhwd %%mm3,%%mm5\n\t" \ + "movq %%mm1,"OC_I(1,_y)"\n\t" \ + "punpckhdq %%mm5,%%mm4\n\t" \ + "punpckldq %%mm5,%%mm2\n\t" \ + "movq %%mm4,"OC_I(3,_y)"\n\t" \ + "movq %%mm2,"OC_I(2,_y)"\n\t" \ + "#end OC_TRANSPOSE\n\t" \ + +/*38+19=57 cycles.*/ +#define OC_COLUMN_IDCT(_y) \ + "#OC_COLUMN_IDCT\n" \ + OC_IDCT_BEGIN(_y,_y) \ + "paddw "OC_MEM_OFFS(0x00,c)",%%mm2\n\t" \ + /*r1=H'+H'*/ \ + "paddw %%mm1,%%mm1\n\t" \ + /*r1=R1=A''+H'*/ \ + "paddw %%mm2,%%mm1\n\t" \ + /*r2=NR2*/ \ + "psraw $4,%%mm2\n\t" \ + /*r4=E'=E-G*/ \ + "psubw %%mm7,%%mm4\n\t" \ + /*r1=NR1*/ \ + "psraw $4,%%mm1\n\t" \ + /*r3=D'*/ \ + "movq "OC_I(2,_y)",%%mm3\n\t" \ + /*r7=G+G*/ \ + "paddw %%mm7,%%mm7\n\t" \ + /*Store NR2 at I(2).*/ \ + "movq %%mm2,"OC_I(2,_y)"\n\t" \ + /*r7=G'=E+G*/ \ + "paddw %%mm4,%%mm7\n\t" \ + /*Store NR1 at I(1).*/ \ + "movq %%mm1,"OC_I(1,_y)"\n\t" \ + /*r4=R4=E'-D'*/ \ + "psubw %%mm3,%%mm4\n\t" \ + "paddw "OC_MEM_OFFS(0x00,c)",%%mm4\n\t" \ + /*r3=D'+D'*/ \ + "paddw %%mm3,%%mm3\n\t" \ + /*r3=R3=E'+D'*/ \ + "paddw %%mm4,%%mm3\n\t" \ + /*r4=NR4*/ \ + "psraw $4,%%mm4\n\t" \ + /*r6=R6=F'-B''*/ \ + "psubw %%mm5,%%mm6\n\t" \ + /*r3=NR3*/ \ + "psraw $4,%%mm3\n\t" \ + "paddw "OC_MEM_OFFS(0x00,c)",%%mm6\n\t" \ + /*r5=B''+B''*/ \ + "paddw %%mm5,%%mm5\n\t" \ + /*r5=R5=F'+B''*/ \ + "paddw %%mm6,%%mm5\n\t" \ + /*r6=NR6*/ \ + "psraw $4,%%mm6\n\t" \ + /*Store NR4 at J(4).*/ \ + "movq %%mm4,"OC_J(4,_y)"\n\t" \ + /*r5=NR5*/ \ + "psraw $4,%%mm5\n\t" \ + /*Store NR3 at I(3).*/ \ + "movq %%mm3,"OC_I(3,_y)"\n\t" \ + /*r7=R7=G'-C'*/ \ + "psubw %%mm0,%%mm7\n\t" \ + "paddw "OC_MEM_OFFS(0x00,c)",%%mm7\n\t" \ + /*r0=C'+C'*/ \ + "paddw %%mm0,%%mm0\n\t" \ + /*r0=R0=G'+C'*/ \ + "paddw %%mm7,%%mm0\n\t" \ + /*r7=NR7*/ \ + "psraw $4,%%mm7\n\t" \ + /*Store NR6 at J(6).*/ \ + "movq %%mm6,"OC_J(6,_y)"\n\t" \ + /*r0=NR0*/ \ + "psraw $4,%%mm0\n\t" \ + /*Store NR5 at J(5).*/ \ + "movq %%mm5,"OC_J(5,_y)"\n\t" \ + /*Store NR7 at J(7).*/ \ + "movq %%mm7,"OC_J(7,_y)"\n\t" \ + /*Store NR0 at I(0).*/ \ + "movq %%mm0,"OC_I(0,_y)"\n\t" \ + "#end OC_COLUMN_IDCT\n\t" \ + +static void oc_idct8x8_slow_mmx(ogg_int16_t _y[64],ogg_int16_t _x[64]){ + int i; + /*This routine accepts an 8x8 matrix, but in partially transposed form. + Every 4x4 block is transposed.*/ + __asm__ __volatile__( +#define OC_I(_k,_y) OC_MEM_OFFS((_k)*16,_y) +#define OC_J(_k,_y) OC_MEM_OFFS(((_k)-4)*16+8,_y) + OC_ROW_IDCT(y,x) + OC_TRANSPOSE(y) +#undef OC_I +#undef OC_J +#define OC_I(_k,_y) OC_MEM_OFFS((_k)*16+64,_y) +#define OC_J(_k,_y) OC_MEM_OFFS(((_k)-4)*16+72,_y) + OC_ROW_IDCT(y,x) + OC_TRANSPOSE(y) +#undef OC_I +#undef OC_J +#define OC_I(_k,_y) OC_MEM_OFFS((_k)*16,_y) +#define OC_J(_k,_y) OC_I(_k,_y) + OC_COLUMN_IDCT(y) +#undef OC_I +#undef OC_J +#define OC_I(_k,_y) OC_MEM_OFFS((_k)*16+8,_y) +#define OC_J(_k,_y) OC_I(_k,_y) + OC_COLUMN_IDCT(y) +#undef OC_I +#undef OC_J + :[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 %%mm0,%%mm0\n\t"::); + for(i=0;i<4;i++){ + __asm__ __volatile__( + "movq %%mm0,"OC_MEM_OFFS(0x00,x)"\n\t" + "movq %%mm0,"OC_MEM_OFFS(0x08,x)"\n\t" + "movq %%mm0,"OC_MEM_OFFS(0x10,x)"\n\t" + "movq %%mm0,"OC_MEM_OFFS(0x18,x)"\n\t" + :[x]"=m"OC_ARRAY_OPERAND(ogg_int16_t,_x+16*i,16) + ); + } +} + +/*25 cycles.*/ +#define OC_IDCT_BEGIN_10(_y,_x) \ + "#OC_IDCT_BEGIN_10\n\t" \ + "movq "OC_I(3,_x)",%%mm2\n\t" \ + "nop\n\t" \ + "movq "OC_MEM_OFFS(0x30,c)",%%mm6\n\t" \ + "movq %%mm2,%%mm4\n\t" \ + "movq "OC_MEM_OFFS(0x50,c)",%%mm1\n\t" \ + "pmulhw %%mm6,%%mm4\n\t" \ + "movq "OC_I(1,_x)",%%mm3\n\t" \ + "pmulhw %%mm2,%%mm1\n\t" \ + "movq "OC_MEM_OFFS(0x10,c)",%%mm0\n\t" \ + "paddw %%mm2,%%mm4\n\t" \ + "pxor %%mm6,%%mm6\n\t" \ + "paddw %%mm1,%%mm2\n\t" \ + "movq "OC_I(2,_x)",%%mm5\n\t" \ + "pmulhw %%mm3,%%mm0\n\t" \ + "movq %%mm5,%%mm1\n\t" \ + "paddw %%mm3,%%mm0\n\t" \ + "pmulhw "OC_MEM_OFFS(0x70,c)",%%mm3\n\t" \ + "psubw %%mm2,%%mm6\n\t" \ + "pmulhw "OC_MEM_OFFS(0x20,c)",%%mm5\n\t" \ + "psubw %%mm4,%%mm0\n\t" \ + "movq "OC_I(2,_x)",%%mm7\n\t" \ + "paddw %%mm4,%%mm4\n\t" \ + "paddw %%mm5,%%mm7\n\t" \ + "paddw %%mm0,%%mm4\n\t" \ + "pmulhw "OC_MEM_OFFS(0x60,c)",%%mm1\n\t" \ + "psubw %%mm6,%%mm3\n\t" \ + "movq %%mm4,"OC_I(1,_y)"\n\t" \ + "paddw %%mm6,%%mm6\n\t" \ + "movq "OC_MEM_OFFS(0x40,c)",%%mm4\n\t" \ + "paddw %%mm3,%%mm6\n\t" \ + "movq %%mm3,%%mm5\n\t" \ + "pmulhw %%mm4,%%mm3\n\t" \ + "movq %%mm6,"OC_I(2,_y)"\n\t" \ + "movq %%mm0,%%mm2\n\t" \ + "movq "OC_I(0,_x)",%%mm6\n\t" \ + "pmulhw %%mm4,%%mm0\n\t" \ + "paddw %%mm3,%%mm5\n\t" \ + "paddw %%mm0,%%mm2\n\t" \ + "psubw %%mm1,%%mm5\n\t" \ + "pmulhw %%mm4,%%mm6\n\t" \ + "paddw "OC_I(0,_x)",%%mm6\n\t" \ + "paddw %%mm1,%%mm1\n\t" \ + "movq %%mm6,%%mm4\n\t" \ + "paddw %%mm5,%%mm1\n\t" \ + "psubw %%mm2,%%mm6\n\t" \ + "paddw %%mm2,%%mm2\n\t" \ + "movq "OC_I(1,_y)",%%mm0\n\t" \ + "paddw %%mm6,%%mm2\n\t" \ + "psubw %%mm1,%%mm2\n\t" \ + "nop\n\t" \ + "#end OC_IDCT_BEGIN_10\n\t" \ + +/*25+8=33 cycles.*/ +#define OC_ROW_IDCT_10(_y,_x) \ + "#OC_ROW_IDCT_10\n\t" \ + OC_IDCT_BEGIN_10(_y,_x) \ + /*r3=D'*/ \ + "movq "OC_I(2,_y)",%%mm3\n\t" \ + /*r4=E'=E-G*/ \ + "psubw %%mm7,%%mm4\n\t" \ + /*r1=H'+H'*/ \ + "paddw %%mm1,%%mm1\n\t" \ + /*r7=G+G*/ \ + "paddw %%mm7,%%mm7\n\t" \ + /*r1=R1=A''+H'*/ \ + "paddw %%mm2,%%mm1\n\t" \ + /*r7=G'=E+G*/ \ + "paddw %%mm4,%%mm7\n\t" \ + /*r4=R4=E'-D'*/ \ + "psubw %%mm3,%%mm4\n\t" \ + "paddw %%mm3,%%mm3\n\t" \ + /*r6=R6=F'-B''*/ \ + "psubw %%mm5,%%mm6\n\t" \ + "paddw %%mm5,%%mm5\n\t" \ + /*r3=R3=E'+D'*/ \ + "paddw %%mm4,%%mm3\n\t" \ + /*r5=R5=F'+B''*/ \ + "paddw %%mm6,%%mm5\n\t" \ + /*r7=R7=G'-C'*/ \ + "psubw %%mm0,%%mm7\n\t" \ + "paddw %%mm0,%%mm0\n\t" \ + /*Save R1.*/ \ + "movq %%mm1,"OC_I(1,_y)"\n\t" \ + /*r0=R0=G'+C'*/ \ + "paddw %%mm7,%%mm0\n\t" \ + "#end OC_ROW_IDCT_10\n\t" \ + +/*25+19=44 cycles'*/ +#define OC_COLUMN_IDCT_10(_y) \ + "#OC_COLUMN_IDCT_10\n\t" \ + OC_IDCT_BEGIN_10(_y,_y) \ + "paddw "OC_MEM_OFFS(0x00,c)",%%mm2\n\t" \ + /*r1=H'+H'*/ \ + "paddw %%mm1,%%mm1\n\t" \ + /*r1=R1=A''+H'*/ \ + "paddw %%mm2,%%mm1\n\t" \ + /*r2=NR2*/ \ + "psraw $4,%%mm2\n\t" \ + /*r4=E'=E-G*/ \ + "psubw %%mm7,%%mm4\n\t" \ + /*r1=NR1*/ \ + "psraw $4,%%mm1\n\t" \ + /*r3=D'*/ \ + "movq "OC_I(2,_y)",%%mm3\n\t" \ + /*r7=G+G*/ \ + "paddw %%mm7,%%mm7\n\t" \ + /*Store NR2 at I(2).*/ \ + "movq %%mm2,"OC_I(2,_y)"\n\t" \ + /*r7=G'=E+G*/ \ + "paddw %%mm4,%%mm7\n\t" \ + /*Store NR1 at I(1).*/ \ + "movq %%mm1,"OC_I(1,_y)"\n\t" \ + /*r4=R4=E'-D'*/ \ + "psubw %%mm3,%%mm4\n\t" \ + "paddw "OC_MEM_OFFS(0x00,c)",%%mm4\n\t" \ + /*r3=D'+D'*/ \ + "paddw %%mm3,%%mm3\n\t" \ + /*r3=R3=E'+D'*/ \ + "paddw %%mm4,%%mm3\n\t" \ + /*r4=NR4*/ \ + "psraw $4,%%mm4\n\t" \ + /*r6=R6=F'-B''*/ \ + "psubw %%mm5,%%mm6\n\t" \ + /*r3=NR3*/ \ + "psraw $4,%%mm3\n\t" \ + "paddw "OC_MEM_OFFS(0x00,c)",%%mm6\n\t" \ + /*r5=B''+B''*/ \ + "paddw %%mm5,%%mm5\n\t" \ + /*r5=R5=F'+B''*/ \ + "paddw %%mm6,%%mm5\n\t" \ + /*r6=NR6*/ \ + "psraw $4,%%mm6\n\t" \ + /*Store NR4 at J(4).*/ \ + "movq %%mm4,"OC_J(4,_y)"\n\t" \ + /*r5=NR5*/ \ + "psraw $4,%%mm5\n\t" \ + /*Store NR3 at I(3).*/ \ + "movq %%mm3,"OC_I(3,_y)"\n\t" \ + /*r7=R7=G'-C'*/ \ + "psubw %%mm0,%%mm7\n\t" \ + "paddw "OC_MEM_OFFS(0x00,c)",%%mm7\n\t" \ + /*r0=C'+C'*/ \ + "paddw %%mm0,%%mm0\n\t" \ + /*r0=R0=G'+C'*/ \ + "paddw %%mm7,%%mm0\n\t" \ + /*r7=NR7*/ \ + "psraw $4,%%mm7\n\t" \ + /*Store NR6 at J(6).*/ \ + "movq %%mm6,"OC_J(6,_y)"\n\t" \ + /*r0=NR0*/ \ + "psraw $4,%%mm0\n\t" \ + /*Store NR5 at J(5).*/ \ + "movq %%mm5,"OC_J(5,_y)"\n\t" \ + /*Store NR7 at J(7).*/ \ + "movq %%mm7,"OC_J(7,_y)"\n\t" \ + /*Store NR0 at I(0).*/ \ + "movq %%mm0,"OC_I(0,_y)"\n\t" \ + "#end OC_COLUMN_IDCT_10\n\t" \ + +static void oc_idct8x8_10_mmx(ogg_int16_t _y[64],ogg_int16_t _x[64]){ + __asm__ __volatile__( +#define OC_I(_k,_y) OC_MEM_OFFS((_k)*16,_y) +#define OC_J(_k,_y) OC_MEM_OFFS(((_k)-4)*16+8,_y) + /*Done with dequant, descramble, and partial transpose. + Now do the iDCT itself.*/ + OC_ROW_IDCT_10(y,x) + OC_TRANSPOSE(y) +#undef OC_I +#undef OC_J +#define OC_I(_k,_y) OC_MEM_OFFS((_k)*16,_y) +#define OC_J(_k,_y) OC_I(_k,_y) + OC_COLUMN_IDCT_10(y) +#undef OC_I +#undef OC_J +#define OC_I(_k,_y) OC_MEM_OFFS((_k)*16+8,_y) +#define OC_J(_k,_y) OC_I(_k,_y) + OC_COLUMN_IDCT_10(y) +#undef OC_I +#undef OC_J + :[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 %%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_mmx(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_mmx(_y,_x); + else oc_idct8x8_slow_mmx(_y,_x); +} + +#endif |