From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 02:47:55 +0200
Subject: Adding upstream version 124.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 media/libtheora/lib/x86/mmxidct.c | 558 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 558 insertions(+)
 create mode 100644 media/libtheora/lib/x86/mmxidct.c

(limited to 'media/libtheora/lib/x86/mmxidct.c')

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
-- 
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