--- /dev/null
+/*
+ * Note: For libavcodec, this code can also be used under the LGPL license
+ */
+/*
+ * idct_mmx.c
+ * Copyright (C) 1999-2001 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
+ *
+ * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
+ *
+ * mpeg2dec is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * mpeg2dec is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "../common.h"
+
+#include "mmx.h"
+
+#define ATTR_ALIGN(align) __attribute__ ((__aligned__ (align)))
+
+#define ROW_SHIFT 11
+#define COL_SHIFT 6
+
+#define round(bias) ((int)(((bias)+0.5) * (1<<ROW_SHIFT)))
+#define rounder(bias) {round (bias), round (bias)}
+
+#if 0
+/* C row IDCT - its just here to document the MMXEXT and MMX versions */
+static inline void idct_row (int16_t * row, int offset,
+ int16_t * table, int32_t * rounder)
+{
+ int C1, C2, C3, C4, C5, C6, C7;
+ int a0, a1, a2, a3, b0, b1, b2, b3;
+
+ row += offset;
+
+ C1 = table[1];
+ C2 = table[2];
+ C3 = table[3];
+ C4 = table[4];
+ C5 = table[5];
+ C6 = table[6];
+ C7 = table[7];
+
+ a0 = C4*row[0] + C2*row[2] + C4*row[4] + C6*row[6] + *rounder;
+ a1 = C4*row[0] + C6*row[2] - C4*row[4] - C2*row[6] + *rounder;
+ a2 = C4*row[0] - C6*row[2] - C4*row[4] + C2*row[6] + *rounder;
+ a3 = C4*row[0] - C2*row[2] + C4*row[4] - C6*row[6] + *rounder;
+
+ b0 = C1*row[1] + C3*row[3] + C5*row[5] + C7*row[7];
+ b1 = C3*row[1] - C7*row[3] - C1*row[5] - C5*row[7];
+ b2 = C5*row[1] - C1*row[3] + C7*row[5] + C3*row[7];
+ b3 = C7*row[1] - C5*row[3] + C3*row[5] - C1*row[7];
+
+ row[0] = (a0 + b0) >> ROW_SHIFT;
+ row[1] = (a1 + b1) >> ROW_SHIFT;
+ row[2] = (a2 + b2) >> ROW_SHIFT;
+ row[3] = (a3 + b3) >> ROW_SHIFT;
+ row[4] = (a3 - b3) >> ROW_SHIFT;
+ row[5] = (a2 - b2) >> ROW_SHIFT;
+ row[6] = (a1 - b1) >> ROW_SHIFT;
+ row[7] = (a0 - b0) >> ROW_SHIFT;
+}
+#endif
+
+
+/* MMXEXT row IDCT */
+
+#define mmxext_table(c1,c2,c3,c4,c5,c6,c7) { c4, c2, -c4, -c2, \
+ c4, c6, c4, c6, \
+ c1, c3, -c1, -c5, \
+ c5, c7, c3, -c7, \
+ c4, -c6, c4, -c6, \
+ -c4, c2, c4, -c2, \
+ c5, -c1, c3, -c1, \
+ c7, c3, c7, -c5 }
+
+static inline void mmxext_row_head (int16_t * row, int offset, int16_t * table)
+{
+ movq_m2r (*(row+offset), mm2); // mm2 = x6 x4 x2 x0
+
+ movq_m2r (*(row+offset+4), mm5); // mm5 = x7 x5 x3 x1
+ movq_r2r (mm2, mm0); // mm0 = x6 x4 x2 x0
+
+ movq_m2r (*table, mm3); // mm3 = -C2 -C4 C2 C4
+ movq_r2r (mm5, mm6); // mm6 = x7 x5 x3 x1
+
+ movq_m2r (*(table+4), mm4); // mm4 = C6 C4 C6 C4
+ pmaddwd_r2r (mm0, mm3); // mm3 = -C4*x4-C2*x6 C4*x0+C2*x2
+
+ pshufw_r2r (mm2, mm2, 0x4e); // mm2 = x2 x0 x6 x4
+}
+
+static inline void mmxext_row (int16_t * table, int32_t * rounder)
+{
+ movq_m2r (*(table+8), mm1); // mm1 = -C5 -C1 C3 C1
+ pmaddwd_r2r (mm2, mm4); // mm4 = C4*x0+C6*x2 C4*x4+C6*x6
+
+ pmaddwd_m2r (*(table+16), mm0); // mm0 = C4*x4-C6*x6 C4*x0-C6*x2
+ pshufw_r2r (mm6, mm6, 0x4e); // mm6 = x3 x1 x7 x5
+
+ movq_m2r (*(table+12), mm7); // mm7 = -C7 C3 C7 C5
+ pmaddwd_r2r (mm5, mm1); // mm1 = -C1*x5-C5*x7 C1*x1+C3*x3
+
+ paddd_m2r (*rounder, mm3); // mm3 += rounder
+ pmaddwd_r2r (mm6, mm7); // mm7 = C3*x1-C7*x3 C5*x5+C7*x7
+
+ pmaddwd_m2r (*(table+20), mm2); // mm2 = C4*x0-C2*x2 -C4*x4+C2*x6
+ paddd_r2r (mm4, mm3); // mm3 = a1 a0 + rounder
+
+ pmaddwd_m2r (*(table+24), mm5); // mm5 = C3*x5-C1*x7 C5*x1-C1*x3
+ movq_r2r (mm3, mm4); // mm4 = a1 a0 + rounder
+
+ pmaddwd_m2r (*(table+28), mm6); // mm6 = C7*x1-C5*x3 C7*x5+C3*x7
+ paddd_r2r (mm7, mm1); // mm1 = b1 b0
+
+ paddd_m2r (*rounder, mm0); // mm0 += rounder
+ psubd_r2r (mm1, mm3); // mm3 = a1-b1 a0-b0 + rounder
+
+ psrad_i2r (ROW_SHIFT, mm3); // mm3 = y6 y7
+ paddd_r2r (mm4, mm1); // mm1 = a1+b1 a0+b0 + rounder
+
+ paddd_r2r (mm2, mm0); // mm0 = a3 a2 + rounder
+ psrad_i2r (ROW_SHIFT, mm1); // mm1 = y1 y0
+
+ paddd_r2r (mm6, mm5); // mm5 = b3 b2
+ movq_r2r (mm0, mm4); // mm4 = a3 a2 + rounder
+
+ paddd_r2r (mm5, mm0); // mm0 = a3+b3 a2+b2 + rounder
+ psubd_r2r (mm5, mm4); // mm4 = a3-b3 a2-b2 + rounder
+}
+
+static inline void mmxext_row_tail (int16_t * row, int store)
+{
+ psrad_i2r (ROW_SHIFT, mm0); // mm0 = y3 y2
+
+ psrad_i2r (ROW_SHIFT, mm4); // mm4 = y4 y5
+
+ packssdw_r2r (mm0, mm1); // mm1 = y3 y2 y1 y0
+
+ packssdw_r2r (mm3, mm4); // mm4 = y6 y7 y4 y5
+
+ movq_r2m (mm1, *(row+store)); // save y3 y2 y1 y0
+ pshufw_r2r (mm4, mm4, 0xb1); // mm4 = y7 y6 y5 y4
+
+ /* slot */
+
+ movq_r2m (mm4, *(row+store+4)); // save y7 y6 y5 y4
+}
+
+static inline void mmxext_row_mid (int16_t * row, int store,
+ int offset, int16_t * table)
+{
+ movq_m2r (*(row+offset), mm2); // mm2 = x6 x4 x2 x0
+ psrad_i2r (ROW_SHIFT, mm0); // mm0 = y3 y2
+
+ movq_m2r (*(row+offset+4), mm5); // mm5 = x7 x5 x3 x1
+ psrad_i2r (ROW_SHIFT, mm4); // mm4 = y4 y5
+
+ packssdw_r2r (mm0, mm1); // mm1 = y3 y2 y1 y0
+ movq_r2r (mm5, mm6); // mm6 = x7 x5 x3 x1
+
+ packssdw_r2r (mm3, mm4); // mm4 = y6 y7 y4 y5
+ movq_r2r (mm2, mm0); // mm0 = x6 x4 x2 x0
+
+ movq_r2m (mm1, *(row+store)); // save y3 y2 y1 y0
+ pshufw_r2r (mm4, mm4, 0xb1); // mm4 = y7 y6 y5 y4
+
+ movq_m2r (*table, mm3); // mm3 = -C2 -C4 C2 C4
+ movq_r2m (mm4, *(row+store+4)); // save y7 y6 y5 y4
+
+ pmaddwd_r2r (mm0, mm3); // mm3 = -C4*x4-C2*x6 C4*x0+C2*x2
+
+ movq_m2r (*(table+4), mm4); // mm4 = C6 C4 C6 C4
+ pshufw_r2r (mm2, mm2, 0x4e); // mm2 = x2 x0 x6 x4
+}
+
+
+/* MMX row IDCT */
+
+#define mmx_table(c1,c2,c3,c4,c5,c6,c7) { c4, c2, c4, c6, \
+ c4, c6, -c4, -c2, \
+ c1, c3, c3, -c7, \
+ c5, c7, -c1, -c5, \
+ c4, -c6, c4, -c2, \
+ -c4, c2, c4, -c6, \
+ c5, -c1, c7, -c5, \
+ c7, c3, c3, -c1 }
+
+static inline void mmx_row_head (int16_t * row, int offset, int16_t * table)
+{
+ movq_m2r (*(row+offset), mm2); // mm2 = x6 x4 x2 x0
+
+ movq_m2r (*(row+offset+4), mm5); // mm5 = x7 x5 x3 x1
+ movq_r2r (mm2, mm0); // mm0 = x6 x4 x2 x0
+
+ movq_m2r (*table, mm3); // mm3 = C6 C4 C2 C4
+ movq_r2r (mm5, mm6); // mm6 = x7 x5 x3 x1
+
+ punpckldq_r2r (mm0, mm0); // mm0 = x2 x0 x2 x0
+
+ movq_m2r (*(table+4), mm4); // mm4 = -C2 -C4 C6 C4
+ pmaddwd_r2r (mm0, mm3); // mm3 = C4*x0+C6*x2 C4*x0+C2*x2
+
+ movq_m2r (*(table+8), mm1); // mm1 = -C7 C3 C3 C1
+ punpckhdq_r2r (mm2, mm2); // mm2 = x6 x4 x6 x4
+}
+
+static inline void mmx_row (int16_t * table, int32_t * rounder)
+{
+ pmaddwd_r2r (mm2, mm4); // mm4 = -C4*x4-C2*x6 C4*x4+C6*x6
+ punpckldq_r2r (mm5, mm5); // mm5 = x3 x1 x3 x1
+
+ pmaddwd_m2r (*(table+16), mm0); // mm0 = C4*x0-C2*x2 C4*x0-C6*x2
+ punpckhdq_r2r (mm6, mm6); // mm6 = x7 x5 x7 x5
+
+ movq_m2r (*(table+12), mm7); // mm7 = -C5 -C1 C7 C5
+ pmaddwd_r2r (mm5, mm1); // mm1 = C3*x1-C7*x3 C1*x1+C3*x3
+
+ paddd_m2r (*rounder, mm3); // mm3 += rounder
+ pmaddwd_r2r (mm6, mm7); // mm7 = -C1*x5-C5*x7 C5*x5+C7*x7
+
+ pmaddwd_m2r (*(table+20), mm2); // mm2 = C4*x4-C6*x6 -C4*x4+C2*x6
+ paddd_r2r (mm4, mm3); // mm3 = a1 a0 + rounder
+
+ pmaddwd_m2r (*(table+24), mm5); // mm5 = C7*x1-C5*x3 C5*x1-C1*x3
+ movq_r2r (mm3, mm4); // mm4 = a1 a0 + rounder
+
+ pmaddwd_m2r (*(table+28), mm6); // mm6 = C3*x5-C1*x7 C7*x5+C3*x7
+ paddd_r2r (mm7, mm1); // mm1 = b1 b0
+
+ paddd_m2r (*rounder, mm0); // mm0 += rounder
+ psubd_r2r (mm1, mm3); // mm3 = a1-b1 a0-b0 + rounder
+
+ psrad_i2r (ROW_SHIFT, mm3); // mm3 = y6 y7
+ paddd_r2r (mm4, mm1); // mm1 = a1+b1 a0+b0 + rounder
+
+ paddd_r2r (mm2, mm0); // mm0 = a3 a2 + rounder
+ psrad_i2r (ROW_SHIFT, mm1); // mm1 = y1 y0
+
+ paddd_r2r (mm6, mm5); // mm5 = b3 b2
+ movq_r2r (mm0, mm7); // mm7 = a3 a2 + rounder
+
+ paddd_r2r (mm5, mm0); // mm0 = a3+b3 a2+b2 + rounder
+ psubd_r2r (mm5, mm7); // mm7 = a3-b3 a2-b2 + rounder
+}
+
+static inline void mmx_row_tail (int16_t * row, int store)
+{
+ psrad_i2r (ROW_SHIFT, mm0); // mm0 = y3 y2
+
+ psrad_i2r (ROW_SHIFT, mm7); // mm7 = y4 y5
+
+ packssdw_r2r (mm0, mm1); // mm1 = y3 y2 y1 y0
+
+ packssdw_r2r (mm3, mm7); // mm7 = y6 y7 y4 y5
+
+ movq_r2m (mm1, *(row+store)); // save y3 y2 y1 y0
+ movq_r2r (mm7, mm4); // mm4 = y6 y7 y4 y5
+
+ pslld_i2r (16, mm7); // mm7 = y7 0 y5 0
+
+ psrld_i2r (16, mm4); // mm4 = 0 y6 0 y4
+
+ por_r2r (mm4, mm7); // mm7 = y7 y6 y5 y4
+
+ /* slot */
+
+ movq_r2m (mm7, *(row+store+4)); // save y7 y6 y5 y4
+}
+
+static inline void mmx_row_mid (int16_t * row, int store,
+ int offset, int16_t * table)
+{
+ movq_m2r (*(row+offset), mm2); // mm2 = x6 x4 x2 x0
+ psrad_i2r (ROW_SHIFT, mm0); // mm0 = y3 y2
+
+ movq_m2r (*(row+offset+4), mm5); // mm5 = x7 x5 x3 x1
+ psrad_i2r (ROW_SHIFT, mm7); // mm7 = y4 y5
+
+ packssdw_r2r (mm0, mm1); // mm1 = y3 y2 y1 y0
+ movq_r2r (mm5, mm6); // mm6 = x7 x5 x3 x1
+
+ packssdw_r2r (mm3, mm7); // mm7 = y6 y7 y4 y5
+ movq_r2r (mm2, mm0); // mm0 = x6 x4 x2 x0
+
+ movq_r2m (mm1, *(row+store)); // save y3 y2 y1 y0
+ movq_r2r (mm7, mm1); // mm1 = y6 y7 y4 y5
+
+ punpckldq_r2r (mm0, mm0); // mm0 = x2 x0 x2 x0
+ psrld_i2r (16, mm7); // mm7 = 0 y6 0 y4
+
+ movq_m2r (*table, mm3); // mm3 = C6 C4 C2 C4
+ pslld_i2r (16, mm1); // mm1 = y7 0 y5 0
+
+ movq_m2r (*(table+4), mm4); // mm4 = -C2 -C4 C6 C4
+ por_r2r (mm1, mm7); // mm7 = y7 y6 y5 y4
+
+ movq_m2r (*(table+8), mm1); // mm1 = -C7 C3 C3 C1
+ punpckhdq_r2r (mm2, mm2); // mm2 = x6 x4 x6 x4
+
+ movq_r2m (mm7, *(row+store+4)); // save y7 y6 y5 y4
+ pmaddwd_r2r (mm0, mm3); // mm3 = C4*x0+C6*x2 C4*x0+C2*x2
+}
+
+
+#if 0
+// C column IDCT - its just here to document the MMXEXT and MMX versions
+static inline void idct_col (int16_t * col, int offset)
+{
+/* multiplication - as implemented on mmx */
+#define F(c,x) (((c) * (x)) >> 16)
+
+/* saturation - it helps us handle torture test cases */
+#define S(x) (((x)>32767) ? 32767 : ((x)<-32768) ? -32768 : (x))
+
+ int16_t x0, x1, x2, x3, x4, x5, x6, x7;
+ int16_t y0, y1, y2, y3, y4, y5, y6, y7;
+ int16_t a0, a1, a2, a3, b0, b1, b2, b3;
+ int16_t u04, v04, u26, v26, u17, v17, u35, v35, u12, v12;
+
+ col += offset;
+
+ x0 = col[0*8];
+ x1 = col[1*8];
+ x2 = col[2*8];
+ x3 = col[3*8];
+ x4 = col[4*8];
+ x5 = col[5*8];
+ x6 = col[6*8];
+ x7 = col[7*8];
+
+ u04 = S (x0 + x4);
+ v04 = S (x0 - x4);
+ u26 = S (F (T2, x6) + x2);
+ v26 = S (F (T2, x2) - x6);
+
+ a0 = S (u04 + u26);
+ a1 = S (v04 + v26);
+ a2 = S (v04 - v26);
+ a3 = S (u04 - u26);
+
+ u17 = S (F (T1, x7) + x1);
+ v17 = S (F (T1, x1) - x7);
+ u35 = S (F (T3, x5) + x3);
+ v35 = S (F (T3, x3) - x5);
+
+ b0 = S (u17 + u35);
+ b3 = S (v17 - v35);
+ u12 = S (u17 - u35);
+ v12 = S (v17 + v35);
+ u12 = S (2 * F (C4, u12));
+ v12 = S (2 * F (C4, v12));
+ b1 = S (u12 + v12);
+ b2 = S (u12 - v12);
+
+ y0 = S (a0 + b0) >> COL_SHIFT;
+ y1 = S (a1 + b1) >> COL_SHIFT;
+ y2 = S (a2 + b2) >> COL_SHIFT;
+ y3 = S (a3 + b3) >> COL_SHIFT;
+
+ y4 = S (a3 - b3) >> COL_SHIFT;
+ y5 = S (a2 - b2) >> COL_SHIFT;
+ y6 = S (a1 - b1) >> COL_SHIFT;
+ y7 = S (a0 - b0) >> COL_SHIFT;
+
+ col[0*8] = y0;
+ col[1*8] = y1;
+ col[2*8] = y2;
+ col[3*8] = y3;
+ col[4*8] = y4;
+ col[5*8] = y5;
+ col[6*8] = y6;
+ col[7*8] = y7;
+}
+#endif
+
+
+// MMX column IDCT
+static inline void idct_col (int16_t * col, int offset)
+{
+#define T1 13036
+#define T2 27146
+#define T3 43790
+#define C4 23170
+
+ static short _T1[] ATTR_ALIGN(8) = {T1,T1,T1,T1};
+ static short _T2[] ATTR_ALIGN(8) = {T2,T2,T2,T2};
+ static short _T3[] ATTR_ALIGN(8) = {T3,T3,T3,T3};
+ static short _C4[] ATTR_ALIGN(8) = {C4,C4,C4,C4};
+
+ /* column code adapted from peter gubanov */
+ /* http://www.elecard.com/peter/idct.shtml */
+
+ movq_m2r (*_T1, mm0); // mm0 = T1
+
+ movq_m2r (*(col+offset+1*8), mm1); // mm1 = x1
+ movq_r2r (mm0, mm2); // mm2 = T1
+
+ movq_m2r (*(col+offset+7*8), mm4); // mm4 = x7
+ pmulhw_r2r (mm1, mm0); // mm0 = T1*x1
+
+ movq_m2r (*_T3, mm5); // mm5 = T3
+ pmulhw_r2r (mm4, mm2); // mm2 = T1*x7
+
+ movq_m2r (*(col+offset+5*8), mm6); // mm6 = x5
+ movq_r2r (mm5, mm7); // mm7 = T3-1
+
+ movq_m2r (*(col+offset+3*8), mm3); // mm3 = x3
+ psubsw_r2r (mm4, mm0); // mm0 = v17
+
+ movq_m2r (*_T2, mm4); // mm4 = T2
+ pmulhw_r2r (mm3, mm5); // mm5 = (T3-1)*x3
+
+ paddsw_r2r (mm2, mm1); // mm1 = u17
+ pmulhw_r2r (mm6, mm7); // mm7 = (T3-1)*x5
+
+ /* slot */
+
+ movq_r2r (mm4, mm2); // mm2 = T2
+ paddsw_r2r (mm3, mm5); // mm5 = T3*x3
+
+ pmulhw_m2r (*(col+offset+2*8), mm4);// mm4 = T2*x2
+ paddsw_r2r (mm6, mm7); // mm7 = T3*x5
+
+ psubsw_r2r (mm6, mm5); // mm5 = v35
+ paddsw_r2r (mm3, mm7); // mm7 = u35
+
+ movq_m2r (*(col+offset+6*8), mm3); // mm3 = x6
+ movq_r2r (mm0, mm6); // mm6 = v17
+
+ pmulhw_r2r (mm3, mm2); // mm2 = T2*x6
+ psubsw_r2r (mm5, mm0); // mm0 = b3
+
+ psubsw_r2r (mm3, mm4); // mm4 = v26
+ paddsw_r2r (mm6, mm5); // mm5 = v12
+
+ movq_r2m (mm0, *(col+offset+3*8)); // save b3 in scratch0
+ movq_r2r (mm1, mm6); // mm6 = u17
+
+ paddsw_m2r (*(col+offset+2*8), mm2);// mm2 = u26
+ paddsw_r2r (mm7, mm6); // mm6 = b0
+
+ psubsw_r2r (mm7, mm1); // mm1 = u12
+ movq_r2r (mm1, mm7); // mm7 = u12
+
+ movq_m2r (*(col+offset+0*8), mm3); // mm3 = x0
+ paddsw_r2r (mm5, mm1); // mm1 = u12+v12
+
+ movq_m2r (*_C4, mm0); // mm0 = C4/2
+ psubsw_r2r (mm5, mm7); // mm7 = u12-v12
+
+ movq_r2m (mm6, *(col+offset+5*8)); // save b0 in scratch1
+ pmulhw_r2r (mm0, mm1); // mm1 = b1/2
+
+ movq_r2r (mm4, mm6); // mm6 = v26
+ pmulhw_r2r (mm0, mm7); // mm7 = b2/2
+
+ movq_m2r (*(col+offset+4*8), mm5); // mm5 = x4
+ movq_r2r (mm3, mm0); // mm0 = x0
+
+ psubsw_r2r (mm5, mm3); // mm3 = v04
+ paddsw_r2r (mm5, mm0); // mm0 = u04
+
+ paddsw_r2r (mm3, mm4); // mm4 = a1
+ movq_r2r (mm0, mm5); // mm5 = u04
+
+ psubsw_r2r (mm6, mm3); // mm3 = a2
+ paddsw_r2r (mm2, mm5); // mm5 = a0
+
+ paddsw_r2r (mm1, mm1); // mm1 = b1
+ psubsw_r2r (mm2, mm0); // mm0 = a3
+
+ paddsw_r2r (mm7, mm7); // mm7 = b2
+ movq_r2r (mm3, mm2); // mm2 = a2
+
+ movq_r2r (mm4, mm6); // mm6 = a1
+ paddsw_r2r (mm7, mm3); // mm3 = a2+b2
+
+ psraw_i2r (COL_SHIFT, mm3); // mm3 = y2
+ paddsw_r2r (mm1, mm4); // mm4 = a1+b1
+
+ psraw_i2r (COL_SHIFT, mm4); // mm4 = y1
+ psubsw_r2r (mm1, mm6); // mm6 = a1-b1
+
+ movq_m2r (*(col+offset+5*8), mm1); // mm1 = b0
+ psubsw_r2r (mm7, mm2); // mm2 = a2-b2
+
+ psraw_i2r (COL_SHIFT, mm6); // mm6 = y6
+ movq_r2r (mm5, mm7); // mm7 = a0
+
+ movq_r2m (mm4, *(col+offset+1*8)); // save y1
+ psraw_i2r (COL_SHIFT, mm2); // mm2 = y5
+
+ movq_r2m (mm3, *(col+offset+2*8)); // save y2
+ paddsw_r2r (mm1, mm5); // mm5 = a0+b0
+
+ movq_m2r (*(col+offset+3*8), mm4); // mm4 = b3
+ psubsw_r2r (mm1, mm7); // mm7 = a0-b0
+
+ psraw_i2r (COL_SHIFT, mm5); // mm5 = y0
+ movq_r2r (mm0, mm3); // mm3 = a3
+
+ movq_r2m (mm2, *(col+offset+5*8)); // save y5
+ psubsw_r2r (mm4, mm3); // mm3 = a3-b3
+
+ psraw_i2r (COL_SHIFT, mm7); // mm7 = y7
+ paddsw_r2r (mm0, mm4); // mm4 = a3+b3
+
+ movq_r2m (mm5, *(col+offset+0*8)); // save y0
+ psraw_i2r (COL_SHIFT, mm3); // mm3 = y4
+
+ movq_r2m (mm6, *(col+offset+6*8)); // save y6
+ psraw_i2r (COL_SHIFT, mm4); // mm4 = y3
+
+ movq_r2m (mm7, *(col+offset+7*8)); // save y7
+
+ movq_r2m (mm3, *(col+offset+4*8)); // save y4
+
+ movq_r2m (mm4, *(col+offset+3*8)); // save y3
+
+#undef T1
+#undef T2
+#undef T3
+#undef C4
+}
+
+static int32_t rounder0[] ATTR_ALIGN(8) =
+ rounder ((1 << (COL_SHIFT - 1)) - 0.5);
+static int32_t rounder4[] ATTR_ALIGN(8) = rounder (0);
+static int32_t rounder1[] ATTR_ALIGN(8) =
+ rounder (1.25683487303); /* C1*(C1/C4+C1+C7)/2 */
+static int32_t rounder7[] ATTR_ALIGN(8) =
+ rounder (-0.25); /* C1*(C7/C4+C7-C1)/2 */
+static int32_t rounder2[] ATTR_ALIGN(8) =
+ rounder (0.60355339059); /* C2 * (C6+C2)/2 */
+static int32_t rounder6[] ATTR_ALIGN(8) =
+ rounder (-0.25); /* C2 * (C6-C2)/2 */
+static int32_t rounder3[] ATTR_ALIGN(8) =
+ rounder (0.087788325588); /* C3*(-C3/C4+C3+C5)/2 */
+static int32_t rounder5[] ATTR_ALIGN(8) =
+ rounder (-0.441341716183); /* C3*(-C5/C4+C5-C3)/2 */
+
+#undef COL_SHIFT
+#undef ROW_SHIFT
+
+#define declare_idct(idct,table,idct_row_head,idct_row,idct_row_tail,idct_row_mid) \
+void idct (int16_t * block) \
+{ \
+ static int16_t table04[] ATTR_ALIGN(16) = \
+ table (22725, 21407, 19266, 16384, 12873, 8867, 4520); \
+ static int16_t table17[] ATTR_ALIGN(16) = \
+ table (31521, 29692, 26722, 22725, 17855, 12299, 6270); \
+ static int16_t table26[] ATTR_ALIGN(16) = \
+ table (29692, 27969, 25172, 21407, 16819, 11585, 5906); \
+ static int16_t table35[] ATTR_ALIGN(16) = \
+ table (26722, 25172, 22654, 19266, 15137, 10426, 5315); \
+ \
+ idct_row_head (block, 0*8, table04); \
+ idct_row (table04, rounder0); \
+ idct_row_mid (block, 0*8, 4*8, table04); \
+ idct_row (table04, rounder4); \
+ idct_row_mid (block, 4*8, 1*8, table17); \
+ idct_row (table17, rounder1); \
+ idct_row_mid (block, 1*8, 7*8, table17); \
+ idct_row (table17, rounder7); \
+ idct_row_mid (block, 7*8, 2*8, table26); \
+ idct_row (table26, rounder2); \
+ idct_row_mid (block, 2*8, 6*8, table26); \
+ idct_row (table26, rounder6); \
+ idct_row_mid (block, 6*8, 3*8, table35); \
+ idct_row (table35, rounder3); \
+ idct_row_mid (block, 3*8, 5*8, table35); \
+ idct_row (table35, rounder5); \
+ idct_row_tail (block, 5*8); \
+ \
+ idct_col (block, 0); \
+ idct_col (block, 4); \
+}
+
+
+declare_idct (ff_mmxext_idct, mmxext_table,
+ mmxext_row_head, mmxext_row, mmxext_row_tail, mmxext_row_mid)
+
+declare_idct (ff_mmx_idct, mmx_table,
+ mmx_row_head, mmx_row, mmx_row_tail, mmx_row_mid)
projects / synfig.git / blobdiff