-/*
- * jidctfst.c
- *
- * Copyright (C) 1994-1998, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains a fast, not so accurate integer implementation of the
- * inverse DCT (Discrete Cosine Transform). In the IJG code, this routine
- * must also perform dequantization of the input coefficients.
- *
- * A 2-D IDCT can be done by 1-D IDCT on each column followed by 1-D IDCT
- * on each row (or vice versa, but it's more convenient to emit a row at
- * a time). Direct algorithms are also available, but they are much more
- * complex and seem not to be any faster when reduced to code.
- *
- * This implementation is based on Arai, Agui, and Nakajima's algorithm for
- * scaled DCT. Their original paper (Trans. IEICE E-71(11):1095) is in
- * Japanese, but the algorithm is described in the Pennebaker & Mitchell
- * JPEG textbook (see REFERENCES section in file README). The following code
- * is based directly on figure 4-8 in P&M.
- * While an 8-point DCT cannot be done in less than 11 multiplies, it is
- * possible to arrange the computation so that many of the multiplies are
- * simple scalings of the final outputs. These multiplies can then be
- * folded into the multiplications or divisions by the JPEG quantization
- * table entries. The AA&N method leaves only 5 multiplies and 29 adds
- * to be done in the DCT itself.
- * The primary disadvantage of this method is that with fixed-point math,
- * accuracy is lost due to imprecise representation of the scaled
- * quantization values. The smaller the quantization table entry, the less
- * precise the scaled value, so this implementation does worse with high-
- * quality-setting files than with low-quality ones.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jdct.h" /* Private declarations for DCT subsystem */
-
-
-#ifdef DCT_IFAST_SUPPORTED
-
-
-/*
- * This module is specialized to the case DCTSIZE = 8.
- */
-
-#if DCTSIZE != 8
- Sorry, this code only copes with 8x8 DCTs. /* deliberate syntax err */
-#endif
-
-
-/* Scaling decisions are generally the same as in the LL&M algorithm;
- * see jidctint.c for more details. However, we choose to descale
- * (right shift) multiplication products as soon as they are formed,
- * rather than carrying additional fractional bits into subsequent additions.
- * This compromises accuracy slightly, but it lets us save a few shifts.
- * More importantly, 16-bit arithmetic is then adequate (for 8-bit samples)
- * everywhere except in the multiplications proper; this saves a good deal
- * of work on 16-bit-int machines.
- *
- * The dequantized coefficients are not integers because the AA&N scaling
- * factors have been incorporated. We represent them scaled up by PASS1_BITS,
- * so that the first and second IDCT rounds have the same input scaling.
- * For 8-bit JSAMPLEs, we choose IFAST_SCALE_BITS = PASS1_BITS so as to
- * avoid a descaling shift; this compromises accuracy rather drastically
- * for small quantization table entries, but it saves a lot of shifts.
- * For 12-bit JSAMPLEs, there's no hope of using 16x16 multiplies anyway,
- * so we use a much larger scaling factor to preserve accuracy.
- *
- * A final compromise is to represent the multiplicative constants to only
- * 8 fractional bits, rather than 13. This saves some shifting work on some
- * machines, and may also reduce the cost of multiplication (since there
- * are fewer one-bits in the constants).
- */
-
-#if BITS_IN_JSAMPLE == 8
-#define CONST_BITS 8
-#define PASS1_BITS 2
-#else
-#define CONST_BITS 8
-#define PASS1_BITS 1 /* lose a little precision to avoid overflow */
-#endif
-
-/* Some C compilers fail to reduce "FIX(constant)" at compile time, thus
- * causing a lot of useless floating-point operations at run time.
- * To get around this we use the following pre-calculated constants.
- * If you change CONST_BITS you may want to add appropriate values.
- * (With a reasonable C compiler, you can just rely on the FIX() macro...)
- */
-
-#if CONST_BITS == 8
-#define FIX_1_082392200 ((INT32) 277) /* FIX(1.082392200) */
-#define FIX_1_414213562 ((INT32) 362) /* FIX(1.414213562) */
-#define FIX_1_847759065 ((INT32) 473) /* FIX(1.847759065) */
-#define FIX_2_613125930 ((INT32) 669) /* FIX(2.613125930) */
-#else
-#define FIX_1_082392200 FIX(1.082392200)
-#define FIX_1_414213562 FIX(1.414213562)
-#define FIX_1_847759065 FIX(1.847759065)
-#define FIX_2_613125930 FIX(2.613125930)
-#endif
-
-
-/* We can gain a little more speed, with a further compromise in accuracy,
- * by omitting the addition in a descaling shift. This yields an incorrectly
- * rounded result half the time...
- */
-
-#ifndef USE_ACCURATE_ROUNDING
-#undef DESCALE
-#define DESCALE(x,n) RIGHT_SHIFT(x, n)
-#endif
-
-
-/* Multiply a DCTELEM variable by an INT32 constant, and immediately
- * descale to yield a DCTELEM result.
- */
-
-#define MULTIPLY(var,const) ((DCTELEM) DESCALE((var) * (const), CONST_BITS))
-
-
-/* Dequantize a coefficient by multiplying it by the multiplier-table
- * entry; produce a DCTELEM result. For 8-bit data a 16x16->16
- * multiplication will do. For 12-bit data, the multiplier table is
- * declared INT32, so a 32-bit multiply will be used.
- */
-
-#if BITS_IN_JSAMPLE == 8
-#define DEQUANTIZE(coef,quantval) (((IFAST_MULT_TYPE) (coef)) * (quantval))
-#else
-#define DEQUANTIZE(coef,quantval) \
- DESCALE((coef)*(quantval), IFAST_SCALE_BITS-PASS1_BITS)
-#endif
-
-
-/* Like DESCALE, but applies to a DCTELEM and produces an int.
- * We assume that int right shift is unsigned if INT32 right shift is.
- */
-
-#ifdef RIGHT_SHIFT_IS_UNSIGNED
-#define ISHIFT_TEMPS DCTELEM ishift_temp;
-#if BITS_IN_JSAMPLE == 8
-#define DCTELEMBITS 16 /* DCTELEM may be 16 or 32 bits */
-#else
-#define DCTELEMBITS 32 /* DCTELEM must be 32 bits */
-#endif
-#define IRIGHT_SHIFT(x,shft) \
- ((ishift_temp = (x)) < 0 ? \
- (ishift_temp >> (shft)) | ((~((DCTELEM) 0)) << (DCTELEMBITS-(shft))) : \
- (ishift_temp >> (shft)))
-#else
-#define ISHIFT_TEMPS
-#define IRIGHT_SHIFT(x,shft) ((x) >> (shft))
-#endif
-
-#ifdef USE_ACCURATE_ROUNDING
-#define IDESCALE(x,n) ((int) IRIGHT_SHIFT((x) + (1 << ((n)-1)), n))
-#else
-#define IDESCALE(x,n) ((int) IRIGHT_SHIFT(x, n))
-#endif
-
-#ifdef HAVE_MMX_INTEL_MNEMONICS
-__inline GLOBAL(void)
-jpeg_idct_ifast_mmx (j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block,
- JSAMPARRAY output_buf, JDIMENSION output_col);
-__inline GLOBAL(void)
-jpeg_idct_ifast_orig (j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block,
- JSAMPARRAY output_buf, JDIMENSION output_col);
-#endif
-
-GLOBAL(void)
-jpeg_idct_ifast(j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block,
- JSAMPARRAY output_buf, JDIMENSION output_col);
-
-
-#ifdef HAVE_MMX_INTEL_MNEMONICS
-GLOBAL(void)
-jpeg_idct_ifast (j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block,
- JSAMPARRAY output_buf, JDIMENSION output_col)
-{
-if (MMXAvailable)
- jpeg_idct_ifast_mmx(cinfo, compptr, coef_block, output_buf, output_col);
-else
- jpeg_idct_ifast_orig(cinfo, compptr, coef_block, output_buf, output_col);
-}
-#else
-
-/*
- * Perform dequantization and inverse DCT on one block of coefficients.
- */
-
-GLOBAL (void)
-jpeg_idct_ifast (j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block,
- JSAMPARRAY output_buf, JDIMENSION output_col)
-{
- DCTELEM tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
- DCTELEM tmp10, tmp11, tmp12, tmp13;
- DCTELEM z5, z10, z11, z12, z13;
- JCOEFPTR inptr;
- IFAST_MULT_TYPE * quantptr;
- int * wsptr;
- JSAMPROW outptr;
- JSAMPLE *range_limit = IDCT_range_limit(cinfo);
- int ctr;
- int workspace[DCTSIZE2]; /* buffers data between passes */
- SHIFT_TEMPS /* for DESCALE */
- ISHIFT_TEMPS /* for IDESCALE */
-
- /* Pass 1: process columns from input, store into work array. */
-
- inptr = coef_block;
- quantptr = (IFAST_MULT_TYPE *) compptr->dct_table;
- wsptr = workspace;
- for (ctr = DCTSIZE; ctr > 0; ctr--) {
- /* Due to quantization, we will usually find that many of the input
- * coefficients are zero, especially the AC terms. We can exploit this
- * by short-circuiting the IDCT calculation for any column in which all
- * the AC terms are zero. In that case each output is equal to the
- * DC coefficient (with scale factor as needed).
- * With typical images and quantization tables, half or more of the
- * column DCT calculations can be simplified this way.
- */
-
- if (inptr[DCTSIZE*1] == 0 && inptr[DCTSIZE*2] == 0 &&
- inptr[DCTSIZE*3] == 0 && inptr[DCTSIZE*4] == 0 &&
- inptr[DCTSIZE*5] == 0 && inptr[DCTSIZE*6] == 0 &&
- inptr[DCTSIZE*7] == 0) {
- /* AC terms all zero */
- int dcval = (int) DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
-
- wsptr[DCTSIZE*0] = dcval;
- wsptr[DCTSIZE*1] = dcval;
- wsptr[DCTSIZE*2] = dcval;
- wsptr[DCTSIZE*3] = dcval;
- wsptr[DCTSIZE*4] = dcval;
- wsptr[DCTSIZE*5] = dcval;
- wsptr[DCTSIZE*6] = dcval;
- wsptr[DCTSIZE*7] = dcval;
-
- inptr++; /* advance pointers to next column */
- quantptr++;
- wsptr++;
- continue;
- }
-
- /* Even part */
-
- tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
- tmp1 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
- tmp2 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
- tmp3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
-
- tmp10 = tmp0 + tmp2; /* phase 3 */
- tmp11 = tmp0 - tmp2;
-
- tmp13 = tmp1 + tmp3; /* phases 5-3 */
- tmp12 = MULTIPLY(tmp1 - tmp3, FIX_1_414213562) - tmp13; /* 2*c4 */
-
- tmp0 = tmp10 + tmp13; /* phase 2 */
- tmp3 = tmp10 - tmp13;
- tmp1 = tmp11 + tmp12;
- tmp2 = tmp11 - tmp12;
-
- /* Odd part */
-
- tmp4 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
- tmp5 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
- tmp6 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
- tmp7 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
-
- z13 = tmp6 + tmp5; /* phase 6 */
- z10 = tmp6 - tmp5;
- z11 = tmp4 + tmp7;
- z12 = tmp4 - tmp7;
-
- tmp7 = z11 + z13; /* phase 5 */
- tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); /* 2*c4 */
-
- z5 = MULTIPLY(z10 + z12, FIX_1_847759065); /* 2*c2 */
- tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5; /* 2*(c2-c6) */
- tmp12 = MULTIPLY(z10, - FIX_2_613125930) + z5; /* -2*(c2+c6) */
-
- tmp6 = tmp12 - tmp7; /* phase 2 */
- tmp5 = tmp11 - tmp6;
- tmp4 = tmp10 + tmp5;
-
- wsptr[DCTSIZE*0] = (int) (tmp0 + tmp7);
- wsptr[DCTSIZE*7] = (int) (tmp0 - tmp7);
- wsptr[DCTSIZE*1] = (int) (tmp1 + tmp6);
- wsptr[DCTSIZE*6] = (int) (tmp1 - tmp6);
- wsptr[DCTSIZE*2] = (int) (tmp2 + tmp5);
- wsptr[DCTSIZE*5] = (int) (tmp2 - tmp5);
- wsptr[DCTSIZE*4] = (int) (tmp3 + tmp4);
- wsptr[DCTSIZE*3] = (int) (tmp3 - tmp4);
-
- inptr++; /* advance pointers to next column */
- quantptr++;
- wsptr++;
- }
-
- /* Pass 2: process rows from work array, store into output array. */
- /* Note that we must descale the results by a factor of 8 == 2**3, */
- /* and also undo the PASS1_BITS scaling. */
-
- wsptr = workspace;
- for (ctr = 0; ctr < DCTSIZE; ctr++) {
- outptr = output_buf[ctr] + output_col;
- /* Rows of zeroes can be exploited in the same way as we did with columns.
- * However, the column calculation has created many nonzero AC terms, so
- * the simplification applies less often (typically 5% to 10% of the time).
- * On machines with very fast multiplication, it's possible that the
- * test takes more time than it's worth. In that case this section
- * may be commented out.
- */
-
-#ifndef NO_ZERO_ROW_TEST
- if (wsptr[1] == 0 && wsptr[2] == 0 && wsptr[3] == 0 && wsptr[4] == 0 &&
- wsptr[5] == 0 && wsptr[6] == 0 && wsptr[7] == 0) {
- /* AC terms all zero */
- JSAMPLE dcval = range_limit[IDESCALE(wsptr[0], PASS1_BITS+3)
- & RANGE_MASK];
-
- outptr[0] = dcval;
- outptr[1] = dcval;
- outptr[2] = dcval;
- outptr[3] = dcval;
- outptr[4] = dcval;
- outptr[5] = dcval;
- outptr[6] = dcval;
- outptr[7] = dcval;
-
- wsptr += DCTSIZE; /* advance pointer to next row */
- continue;
- }
-#endif
-
- /* Even part */
-
- tmp10 = ((DCTELEM) wsptr[0] + (DCTELEM) wsptr[4]);
- tmp11 = ((DCTELEM) wsptr[0] - (DCTELEM) wsptr[4]);
-
- tmp13 = ((DCTELEM) wsptr[2] + (DCTELEM) wsptr[6]);
- tmp12 = MULTIPLY((DCTELEM) wsptr[2] - (DCTELEM) wsptr[6], FIX_1_414213562)
- - tmp13;
-
- tmp0 = tmp10 + tmp13;
- tmp3 = tmp10 - tmp13;
- tmp1 = tmp11 + tmp12;
- tmp2 = tmp11 - tmp12;
-
- /* Odd part */
-
- z13 = (DCTELEM) wsptr[5] + (DCTELEM) wsptr[3];
- z10 = (DCTELEM) wsptr[5] - (DCTELEM) wsptr[3];
- z11 = (DCTELEM) wsptr[1] + (DCTELEM) wsptr[7];
- z12 = (DCTELEM) wsptr[1] - (DCTELEM) wsptr[7];
-
- tmp7 = z11 + z13; /* phase 5 */
- tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); /* 2*c4 */
-
- z5 = MULTIPLY(z10 + z12, FIX_1_847759065); /* 2*c2 */
- tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5; /* 2*(c2-c6) */
- tmp12 = MULTIPLY(z10, - FIX_2_613125930) + z5; /* -2*(c2+c6) */
-
- tmp6 = tmp12 - tmp7; /* phase 2 */
- tmp5 = tmp11 - tmp6;
- tmp4 = tmp10 + tmp5;
-
- /* Final output stage: scale down by a factor of 8 and range-limit */
-
- outptr[0] = range_limit[IDESCALE(tmp0 + tmp7, PASS1_BITS+3)
- & RANGE_MASK];
- outptr[7] = range_limit[IDESCALE(tmp0 - tmp7, PASS1_BITS+3)
- & RANGE_MASK];
- outptr[1] = range_limit[IDESCALE(tmp1 + tmp6, PASS1_BITS+3)
- & RANGE_MASK];
- outptr[6] = range_limit[IDESCALE(tmp1 - tmp6, PASS1_BITS+3)
- & RANGE_MASK];
- outptr[2] = range_limit[IDESCALE(tmp2 + tmp5, PASS1_BITS+3)
- & RANGE_MASK];
- outptr[5] = range_limit[IDESCALE(tmp2 - tmp5, PASS1_BITS+3)
- & RANGE_MASK];
- outptr[4] = range_limit[IDESCALE(tmp3 + tmp4, PASS1_BITS+3)
- & RANGE_MASK];
- outptr[3] = range_limit[IDESCALE(tmp3 - tmp4, PASS1_BITS+3)
- & RANGE_MASK];
-
- wsptr += DCTSIZE; /* advance pointer to next row */
- }
-}
-
-#endif
-
-#ifdef HAVE_MMX_INTEL_MNEMONICS
-
-
-_inline GLOBAL(void)
-jpeg_idct_ifast_orig (j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR coef_block,
- JSAMPARRAY output_buf, JDIMENSION output_col)
-{
- DCTELEM tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
- DCTELEM tmp10, tmp11, tmp12, tmp13;
- DCTELEM z5, z10, z11, z12, z13;
- JCOEFPTR inptr;
- IFAST_MULT_TYPE * quantptr;
- int * wsptr;
- JSAMPROW outptr;
- JSAMPLE *range_limit = IDCT_range_limit(cinfo);
- int ctr;
- int workspace[DCTSIZE2]; /* buffers data between passes */
- SHIFT_TEMPS /* for DESCALE */
- ISHIFT_TEMPS /* for IDESCALE */
-
- /* Pass 1: process columns from input, store into work array. */
-
- inptr = coef_block;
- quantptr = (IFAST_MULT_TYPE *) compptr->dct_table;
- wsptr = workspace;
- for (ctr = DCTSIZE; ctr > 0; ctr--) {
- /* Due to quantization, we will usually find that many of the input
- * coefficients are zero, especially the AC terms. We can exploit this
- * by short-circuiting the IDCT calculation for any column in which all
- * the AC terms are zero. In that case each output is equal to the
- * DC coefficient (with scale factor as needed).
- * With typical images and quantization tables, half or more of the
- * column DCT calculations can be simplified this way.
- */
-
- if ((inptr[DCTSIZE*1] | inptr[DCTSIZE*2] | inptr[DCTSIZE*3] |
- inptr[DCTSIZE*4] | inptr[DCTSIZE*5] | inptr[DCTSIZE*6] |
- inptr[DCTSIZE*7]) == 0) {
- /* AC terms all zero */
- int dcval = (int) DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
-
- wsptr[DCTSIZE*0] = dcval;
- wsptr[DCTSIZE*1] = dcval;
- wsptr[DCTSIZE*2] = dcval;
- wsptr[DCTSIZE*3] = dcval;
- wsptr[DCTSIZE*4] = dcval;
- wsptr[DCTSIZE*5] = dcval;
- wsptr[DCTSIZE*6] = dcval;
- wsptr[DCTSIZE*7] = dcval;
-
- inptr++; /* advance pointers to next column */
- quantptr++;
- wsptr++;
- continue;
- }
-
- /* Even part */
-
- tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
- tmp1 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
- tmp2 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
- tmp3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
-
- tmp10 = tmp0 + tmp2; /* phase 3 */
- tmp11 = tmp0 - tmp2;
-
- tmp13 = tmp1 + tmp3; /* phases 5-3 */
- tmp12 = MULTIPLY(tmp1 - tmp3, FIX_1_414213562) - tmp13; /* 2*c4 */
-
- tmp0 = tmp10 + tmp13; /* phase 2 */
- tmp3 = tmp10 - tmp13;
- tmp1 = tmp11 + tmp12;
- tmp2 = tmp11 - tmp12;
-
- /* Odd part */
-
- tmp4 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
- tmp5 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
- tmp6 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
- tmp7 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
-
- z13 = tmp6 + tmp5; /* phase 6 */
- z10 = tmp6 - tmp5;
- z11 = tmp4 + tmp7;
- z12 = tmp4 - tmp7;
-
- tmp7 = z11 + z13; /* phase 5 */
- tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); /* 2*c4 */
-
- z5 = MULTIPLY(z10 + z12, FIX_1_847759065); /* 2*c2 */
- tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5; /* 2*(c2-c6) */
- tmp12 = MULTIPLY(z10, - FIX_2_613125930) + z5; /* -2*(c2+c6) */
-
- tmp6 = tmp12 - tmp7; /* phase 2 */
- tmp5 = tmp11 - tmp6;
- tmp4 = tmp10 + tmp5;
-
- wsptr[DCTSIZE*0] = (int) (tmp0 + tmp7);
- wsptr[DCTSIZE*7] = (int) (tmp0 - tmp7);
- wsptr[DCTSIZE*1] = (int) (tmp1 + tmp6);
- wsptr[DCTSIZE*6] = (int) (tmp1 - tmp6);
- wsptr[DCTSIZE*2] = (int) (tmp2 + tmp5);
- wsptr[DCTSIZE*5] = (int) (tmp2 - tmp5);
- wsptr[DCTSIZE*4] = (int) (tmp3 + tmp4);
- wsptr[DCTSIZE*3] = (int) (tmp3 - tmp4);
-
- inptr++; /* advance pointers to next column */
- quantptr++;
- wsptr++;
- }
-
- /* Pass 2: process rows from work array, store into output array. */
- /* Note that we must descale the results by a factor of 8 == 2**3, */
- /* and also undo the PASS1_BITS scaling. */
-
- wsptr = workspace;
- for (ctr = 0; ctr < DCTSIZE; ctr++) {
- outptr = output_buf[ctr] + output_col;
- /* Rows of zeroes can be exploited in the same way as we did with columns.
- * However, the column calculation has created many nonzero AC terms, so
- * the simplification applies less often (typically 5% to 10% of the time).
- * On machines with very fast multiplication, it's possible that the
- * test takes more time than it's worth. In that case this section
- * may be commented out.
- */
-
-#ifndef NO_ZERO_ROW_TEST
- if ((wsptr[1] | wsptr[2] | wsptr[3] | wsptr[4] | wsptr[5] | wsptr[6] |
- wsptr[7]) == 0) {
- /* AC terms all zero */
- JSAMPLE dcval = range_limit[IDESCALE(wsptr[0], PASS1_BITS+3)
- & RANGE_MASK];
-
- outptr[0] = dcval;
- outptr[1] = dcval;
- outptr[2] = dcval;
- outptr[3] = dcval;
- outptr[4] = dcval;
- outptr[5] = dcval;
- outptr[6] = dcval;
- outptr[7] = dcval;
-
- wsptr += DCTSIZE; /* advance pointer to next row */
- continue;
- }
-#endif
-
- /* Even part */
-
- tmp10 = ((DCTELEM) wsptr[0] + (DCTELEM) wsptr[4]);
- tmp11 = ((DCTELEM) wsptr[0] - (DCTELEM) wsptr[4]);
-
- tmp13 = ((DCTELEM) wsptr[2] + (DCTELEM) wsptr[6]);
- tmp12 = MULTIPLY((DCTELEM) wsptr[2] - (DCTELEM) wsptr[6], FIX_1_414213562)
- - tmp13;
-
- tmp0 = tmp10 + tmp13;
- tmp3 = tmp10 - tmp13;
- tmp1 = tmp11 + tmp12;
- tmp2 = tmp11 - tmp12;
-
- /* Odd part */
-
- z13 = (DCTELEM) wsptr[5] + (DCTELEM) wsptr[3];
- z10 = (DCTELEM) wsptr[5] - (DCTELEM) wsptr[3];
- z11 = (DCTELEM) wsptr[1] + (DCTELEM) wsptr[7];
- z12 = (DCTELEM) wsptr[1] - (DCTELEM) wsptr[7];
-
- tmp7 = z11 + z13; /* phase 5 */
- tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); /* 2*c4 */
-
- z5 = MULTIPLY(z10 + z12, FIX_1_847759065); /* 2*c2 */
- tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5; /* 2*(c2-c6) */
- tmp12 = MULTIPLY(z10, - FIX_2_613125930) + z5; /* -2*(c2+c6) */
-
- tmp6 = tmp12 - tmp7; /* phase 2 */
- tmp5 = tmp11 - tmp6;
- tmp4 = tmp10 + tmp5;
-
- /* Final output stage: scale down by a factor of 8 and range-limit */
-
- outptr[0] = range_limit[IDESCALE(tmp0 + tmp7, PASS1_BITS+3)
- & RANGE_MASK];
- outptr[7] = range_limit[IDESCALE(tmp0 - tmp7, PASS1_BITS+3)
- & RANGE_MASK];
- outptr[1] = range_limit[IDESCALE(tmp1 + tmp6, PASS1_BITS+3)
- & RANGE_MASK];
- outptr[6] = range_limit[IDESCALE(tmp1 - tmp6, PASS1_BITS+3)
- & RANGE_MASK];
- outptr[2] = range_limit[IDESCALE(tmp2 + tmp5, PASS1_BITS+3)
- & RANGE_MASK];
- outptr[5] = range_limit[IDESCALE(tmp2 - tmp5, PASS1_BITS+3)
- & RANGE_MASK];
- outptr[4] = range_limit[IDESCALE(tmp3 + tmp4, PASS1_BITS+3)
- & RANGE_MASK];
- outptr[3] = range_limit[IDESCALE(tmp3 - tmp4, PASS1_BITS+3)
- & RANGE_MASK];
-
- wsptr += DCTSIZE; /* advance pointer to next row */
- }
-}
-
-
- static __int64 fix_141 = 0x5a825a825a825a82;
- static __int64 fix_184n261 = 0xcf04cf04cf04cf04;
- static __int64 fix_184 = 0x7641764176417641;
- static __int64 fix_n184 = 0x896f896f896f896f;
- static __int64 fix_108n184 = 0xcf04cf04cf04cf04;
- static __int64 const_0x0080 = 0x0080008000800080;
-
-
-__inline GLOBAL(void)
-jpeg_idct_ifast_mmx (j_decompress_ptr cinfo, jpeg_component_info * compptr,
- JCOEFPTR inptr,
- JSAMPARRAY outptr, JDIMENSION output_col)
-{
-
- int16 workspace[DCTSIZE2 + 4]; /* buffers data between passes */
- int16 *wsptr=workspace;
- int16 *quantptr=compptr->dct_table;
-
- __asm{
-
- mov edi, quantptr
- mov ebx, inptr
- mov esi, wsptr
- add esi, 0x07 ;align wsptr to qword
- and esi, 0xfffffff8 ;align wsptr to qword
-
- mov eax, esi
-
- /* Odd part */
-
-
- movq mm1, [ebx + 8*10] ;load inptr[DCTSIZE*5]
-
- pmullw mm1, [edi + 8*10] ;tmp6 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
-
- movq mm0, [ebx + 8*6] ;load inptr[DCTSIZE*3]
-
- pmullw mm0, [edi + 8*6] ;tmp5 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
-
- movq mm3, [ebx + 8*2] ;load inptr[DCTSIZE*1]
- movq mm2, mm1 ;copy tmp6 /* phase 6 */
-
- pmullw mm3, [edi + 8*2] ;tmp4 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
-
- movq mm4, [ebx + 8*14] ;load inptr[DCTSIZE*1]
- paddw mm1, mm0 ;z13 = tmp6 + tmp5;
-
- pmullw mm4, [edi + 8*14] ;tmp7 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
- psubw mm2, mm0 ;z10 = tmp6 - tmp5
-
- psllw mm2, 2 ;shift z10
- movq mm0, mm2 ;copy z10
-
- pmulhw mm2, fix_184n261 ;MULTIPLY( z12, FIX_1_847759065); /* 2*c2 */
- movq mm5, mm3 ;copy tmp4
-
- pmulhw mm0, fix_n184 ;MULTIPLY(z10, -FIX_1_847759065); /* 2*c2 */
- paddw mm3, mm4 ;z11 = tmp4 + tmp7;
-
- movq mm6, mm3 ;copy z11 /* phase 5 */
- psubw mm5, mm4 ;z12 = tmp4 - tmp7;
-
- psubw mm6, mm1 ;z11-z13
- psllw mm5, 2 ;shift z12
-
- movq mm4, [ebx + 8*12] ;load inptr[DCTSIZE*6], even part
- movq mm7, mm5 ;copy z12
-
- pmulhw mm5, fix_108n184 ;MULT(z12, (FIX_1_08-FIX_1_84)) //- z5; /* 2*(c2-c6) */ even part
- paddw mm3, mm1 ;tmp7 = z11 + z13;
-
-
- /* Even part */
- pmulhw mm7, fix_184 ;MULTIPLY(z10,(FIX_1_847759065 - FIX_2_613125930)) //+ z5; /* -2*(c2+c6) */
- psllw mm6, 2
-
- movq mm1, [ebx + 8*4] ;load inptr[DCTSIZE*2]
-
- pmullw mm1, [edi + 8*4] ;tmp1 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
- paddw mm0, mm5 ;tmp10
-
- pmullw mm4, [edi + 8*12] ;tmp3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
- paddw mm2, mm7 ;tmp12
-
- pmulhw mm6, fix_141 ;tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); /* 2*c4 */
- psubw mm2, mm3 ;tmp6 = tmp12 - tmp7
-
- movq mm5, mm1 ;copy tmp1
- paddw mm1, mm4 ;tmp13= tmp1 + tmp3; /* phases 5-3 */
-
- psubw mm5, mm4 ;tmp1-tmp3
- psubw mm6, mm2 ;tmp5 = tmp11 - tmp6;
-
- movq [esi+8*0], mm1 ;save tmp13 in workspace
- psllw mm5, 2 ;shift tmp1-tmp3
-
- movq mm7, [ebx + 8*0] ;load inptr[DCTSIZE*0]
-
- pmulhw mm5, fix_141 ;MULTIPLY(tmp1 - tmp3, FIX_1_414213562)
- paddw mm0, mm6 ;tmp4 = tmp10 + tmp5;
-
- pmullw mm7, [edi + 8*0] ;tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
-
- movq mm4, [ebx + 8*8] ;load inptr[DCTSIZE*4]
-
- pmullw mm4, [edi + 8*8] ;tmp2 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
- psubw mm5, mm1 ;tmp12 = MULTIPLY(tmp1 - tmp3, FIX_1_414213562) - tmp13; /* 2*c4 */
-
- movq [esi+8*4], mm0 ;save tmp4 in workspace
- movq mm1, mm7 ;copy tmp0 /* phase 3 */
-
- movq [esi+8*2], mm5 ;save tmp12 in workspace
- psubw mm1, mm4 ;tmp11 = tmp0 - tmp2;
-
- paddw mm7, mm4 ;tmp10 = tmp0 + tmp2;
- movq mm5, mm1 ;copy tmp11
-
- paddw mm1, [esi+8*2] ;tmp1 = tmp11 + tmp12;
- movq mm4, mm7 ;copy tmp10 /* phase 2 */
-
- paddw mm7, [esi+8*0] ;tmp0 = tmp10 + tmp13;
-
- psubw mm4, [esi+8*0] ;tmp3 = tmp10 - tmp13;
- movq mm0, mm7 ;copy tmp0
-
- psubw mm5, [esi+8*2] ;tmp2 = tmp11 - tmp12;
- paddw mm7, mm3 ;wsptr[DCTSIZE*0] = (int) (tmp0 + tmp7);
-
- psubw mm0, mm3 ;wsptr[DCTSIZE*7] = (int) (tmp0 - tmp7);
-
- movq [esi + 8*0], mm7 ;wsptr[DCTSIZE*0]
- movq mm3, mm1 ;copy tmp1
-
- movq [esi + 8*14], mm0 ;wsptr[DCTSIZE*7]
- paddw mm1, mm2 ;wsptr[DCTSIZE*1] = (int) (tmp1 + tmp6);
-
- psubw mm3, mm2 ;wsptr[DCTSIZE*6] = (int) (tmp1 - tmp6);
-
- movq [esi + 8*2], mm1 ;wsptr[DCTSIZE*1]
- movq mm1, mm4 ;copy tmp3
-
- movq [esi + 8*12], mm3 ;wsptr[DCTSIZE*6]
-
- paddw mm4, [esi+8*4] ;wsptr[DCTSIZE*4] = (int) (tmp3 + tmp4);
-
- psubw mm1, [esi+8*4] ;wsptr[DCTSIZE*3] = (int) (tmp3 - tmp4);
-
- movq [esi + 8*8], mm4
- movq mm7, mm5 ;copy tmp2
-
- paddw mm5, mm6 ;wsptr[DCTSIZE*2] = (int) (tmp2 + tmp5)
-
- movq [esi+8*6], mm1 ;
- psubw mm7, mm6 ;wsptr[DCTSIZE*5] = (int) (tmp2 - tmp5);
-
- movq [esi + 8*4], mm5
-
- movq [esi + 8*10], mm7
-
-
-
-/*****************************************************************/
- add edi, 8
- add ebx, 8
- add esi, 8
-
-/*****************************************************************/
-
-
-
-
- movq mm1, [ebx + 8*10] ;load inptr[DCTSIZE*5]
-
- pmullw mm1, [edi + 8*10] ;tmp6 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
-
- movq mm0, [ebx + 8*6] ;load inptr[DCTSIZE*3]
-
- pmullw mm0, [edi + 8*6] ;tmp5 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
-
- movq mm3, [ebx + 8*2] ;load inptr[DCTSIZE*1]
- movq mm2, mm1 ;copy tmp6 /* phase 6 */
-
- pmullw mm3, [edi + 8*2] ;tmp4 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
-
- movq mm4, [ebx + 8*14] ;load inptr[DCTSIZE*1]
- paddw mm1, mm0 ;z13 = tmp6 + tmp5;
-
- pmullw mm4, [edi + 8*14] ;tmp7 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
- psubw mm2, mm0 ;z10 = tmp6 - tmp5
-
- psllw mm2, 2 ;shift z10
- movq mm0, mm2 ;copy z10
-
- pmulhw mm2, fix_184n261 ;MULTIPLY( z12, FIX_1_847759065); /* 2*c2 */
- movq mm5, mm3 ;copy tmp4
-
- pmulhw mm0, fix_n184 ;MULTIPLY(z10, -FIX_1_847759065); /* 2*c2 */
- paddw mm3, mm4 ;z11 = tmp4 + tmp7;
-
- movq mm6, mm3 ;copy z11 /* phase 5 */
- psubw mm5, mm4 ;z12 = tmp4 - tmp7;
-
- psubw mm6, mm1 ;z11-z13
- psllw mm5, 2 ;shift z12
-
- movq mm4, [ebx + 8*12] ;load inptr[DCTSIZE*6], even part
- movq mm7, mm5 ;copy z12
-
- pmulhw mm5, fix_108n184 ;MULT(z12, (FIX_1_08-FIX_1_84)) //- z5; /* 2*(c2-c6) */ even part
- paddw mm3, mm1 ;tmp7 = z11 + z13;
-
-
- /* Even part */
- pmulhw mm7, fix_184 ;MULTIPLY(z10,(FIX_1_847759065 - FIX_2_613125930)) //+ z5; /* -2*(c2+c6) */
- psllw mm6, 2
-
- movq mm1, [ebx + 8*4] ;load inptr[DCTSIZE*2]
-
- pmullw mm1, [edi + 8*4] ;tmp1 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
- paddw mm0, mm5 ;tmp10
-
- pmullw mm4, [edi + 8*12] ;tmp3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
- paddw mm2, mm7 ;tmp12
-
- pmulhw mm6, fix_141 ;tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); /* 2*c4 */
- psubw mm2, mm3 ;tmp6 = tmp12 - tmp7
-
- movq mm5, mm1 ;copy tmp1
- paddw mm1, mm4 ;tmp13= tmp1 + tmp3; /* phases 5-3 */
-
- psubw mm5, mm4 ;tmp1-tmp3
- psubw mm6, mm2 ;tmp5 = tmp11 - tmp6;
-
- movq [esi+8*0], mm1 ;save tmp13 in workspace
- psllw mm5, 2 ;shift tmp1-tmp3
-
- movq mm7, [ebx + 8*0] ;load inptr[DCTSIZE*0]
- paddw mm0, mm6 ;tmp4 = tmp10 + tmp5;
-
- pmulhw mm5, fix_141 ;MULTIPLY(tmp1 - tmp3, FIX_1_414213562)
-
- pmullw mm7, [edi + 8*0] ;tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
-
- movq mm4, [ebx + 8*8] ;load inptr[DCTSIZE*4]
-
- pmullw mm4, [edi + 8*8] ;tmp2 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
- psubw mm5, mm1 ;tmp12 = MULTIPLY(tmp1 - tmp3, FIX_1_414213562) - tmp13; /* 2*c4 */
-
- movq [esi+8*4], mm0 ;save tmp4 in workspace
- movq mm1, mm7 ;copy tmp0 /* phase 3 */
-
- movq [esi+8*2], mm5 ;save tmp12 in workspace
- psubw mm1, mm4 ;tmp11 = tmp0 - tmp2;
-
- paddw mm7, mm4 ;tmp10 = tmp0 + tmp2;
- movq mm5, mm1 ;copy tmp11
-
- paddw mm1, [esi+8*2] ;tmp1 = tmp11 + tmp12;
- movq mm4, mm7 ;copy tmp10 /* phase 2 */
-
- paddw mm7, [esi+8*0] ;tmp0 = tmp10 + tmp13;
-
- psubw mm4, [esi+8*0] ;tmp3 = tmp10 - tmp13;
- movq mm0, mm7 ;copy tmp0
-
- psubw mm5, [esi+8*2] ;tmp2 = tmp11 - tmp12;
- paddw mm7, mm3 ;wsptr[DCTSIZE*0] = (int) (tmp0 + tmp7);
-
- psubw mm0, mm3 ;wsptr[DCTSIZE*7] = (int) (tmp0 - tmp7);
-
- movq [esi + 8*0], mm7 ;wsptr[DCTSIZE*0]
- movq mm3, mm1 ;copy tmp1
-
- movq [esi + 8*14], mm0 ;wsptr[DCTSIZE*7]
- paddw mm1, mm2 ;wsptr[DCTSIZE*1] = (int) (tmp1 + tmp6);
-
- psubw mm3, mm2 ;wsptr[DCTSIZE*6] = (int) (tmp1 - tmp6);
-
- movq [esi + 8*2], mm1 ;wsptr[DCTSIZE*1]
- movq mm1, mm4 ;copy tmp3
-
- movq [esi + 8*12], mm3 ;wsptr[DCTSIZE*6]
-
- paddw mm4, [esi+8*4] ;wsptr[DCTSIZE*4] = (int) (tmp3 + tmp4);
-
- psubw mm1, [esi+8*4] ;wsptr[DCTSIZE*3] = (int) (tmp3 - tmp4);
-
- movq [esi + 8*8], mm4
- movq mm7, mm5 ;copy tmp2
-
- paddw mm5, mm6 ;wsptr[DCTSIZE*2] = (int) (tmp2 + tmp5)
-
- movq [esi+8*6], mm1 ;
- psubw mm7, mm6 ;wsptr[DCTSIZE*5] = (int) (tmp2 - tmp5);
-
- movq [esi + 8*4], mm5
-
- movq [esi + 8*10], mm7
-
-
-
-
-/*****************************************************************/
-
- /* Pass 2: process rows from work array, store into output array. */
- /* Note that we must descale the results by a factor of 8 == 2**3, */
- /* and also undo the PASS1_BITS scaling. */
-
-/*****************************************************************/
- /* Even part */
-
- mov esi, eax
- mov eax, outptr
-
-// tmp10 = ((DCTELEM) wsptr[0] + (DCTELEM) wsptr[4]);
-// tmp13 = ((DCTELEM) wsptr[2] + (DCTELEM) wsptr[6]);
-// tmp11 = ((DCTELEM) wsptr[0] - (DCTELEM) wsptr[4]);
-// tmp14 = ((DCTELEM) wsptr[2] - (DCTELEM) wsptr[6]);
- movq mm0, [esi+8*0] ;wsptr[0,0],[0,1],[0,2],[0,3]
-
- movq mm1, [esi+8*1] ;wsptr[0,4],[0,5],[0,6],[0,7]
- movq mm2, mm0
-
- movq mm3, [esi+8*2] ;wsptr[1,0],[1,1],[1,2],[1,3]
- paddw mm0, mm1 ;wsptr[0,tmp10],[xxx],[0,tmp13],[xxx]
-
- movq mm4, [esi+8*3] ;wsptr[1,4],[1,5],[1,6],[1,7]
- psubw mm2, mm1 ;wsptr[0,tmp11],[xxx],[0,tmp14],[xxx]
-
- movq mm6, mm0
- movq mm5, mm3
-
- paddw mm3, mm4 ;wsptr[1,tmp10],[xxx],[1,tmp13],[xxx]
- movq mm1, mm2
-
- psubw mm5, mm4 ;wsptr[1,tmp11],[xxx],[1,tmp14],[xxx]
- punpcklwd mm0, mm3 ;wsptr[0,tmp10],[1,tmp10],[xxx],[xxx]
-
- movq mm7, [esi+8*7] ;wsptr[3,4],[3,5],[3,6],[3,7]
- punpckhwd mm6, mm3 ;wsptr[0,tmp13],[1,tmp13],[xxx],[xxx]
-
- movq mm3, [esi+8*4] ;wsptr[2,0],[2,1],[2,2],[2,3]
- punpckldq mm0, mm6 ;wsptr[0,tmp10],[1,tmp10],[0,tmp13],[1,tmp13]
-
- punpcklwd mm1, mm5 ;wsptr[0,tmp11],[1,tmp11],[xxx],[xxx]
- movq mm4, mm3
-
- movq mm6, [esi+8*6] ;wsptr[3,0],[3,1],[3,2],[3,3]
- punpckhwd mm2, mm5 ;wsptr[0,tmp14],[1,tmp14],[xxx],[xxx]
-
- movq mm5, [esi+8*5] ;wsptr[2,4],[2,5],[2,6],[2,7]
- punpckldq mm1, mm2 ;wsptr[0,tmp11],[1,tmp11],[0,tmp14],[1,tmp14]
-
-
- paddw mm3, mm5 ;wsptr[2,tmp10],[xxx],[2,tmp13],[xxx]
- movq mm2, mm6
-
- psubw mm4, mm5 ;wsptr[2,tmp11],[xxx],[2,tmp14],[xxx]
- paddw mm6, mm7 ;wsptr[3,tmp10],[xxx],[3,tmp13],[xxx]
-
- movq mm5, mm3
- punpcklwd mm3, mm6 ;wsptr[2,tmp10],[3,tmp10],[xxx],[xxx]
-
- psubw mm2, mm7 ;wsptr[3,tmp11],[xxx],[3,tmp14],[xxx]
- punpckhwd mm5, mm6 ;wsptr[2,tmp13],[3,tmp13],[xxx],[xxx]
-
- movq mm7, mm4
- punpckldq mm3, mm5 ;wsptr[2,tmp10],[3,tmp10],[2,tmp13],[3,tmp13]
-
- punpcklwd mm4, mm2 ;wsptr[2,tmp11],[3,tmp11],[xxx],[xxx]
-
- punpckhwd mm7, mm2 ;wsptr[2,tmp14],[3,tmp14],[xxx],[xxx]
-
- punpckldq mm4, mm7 ;wsptr[2,tmp11],[3,tmp11],[2,tmp14],[3,tmp14]
- movq mm6, mm1
-
-// mm0 = ;wsptr[0,tmp10],[1,tmp10],[0,tmp13],[1,tmp13]
-// mm1 = ;wsptr[0,tmp11],[1,tmp11],[0,tmp14],[1,tmp14]
-
-
- movq mm2, mm0
- punpckhdq mm6, mm4 ;wsptr[0,tmp14],[1,tmp14],[2,tmp14],[3,tmp14]
-
- punpckldq mm1, mm4 ;wsptr[0,tmp11],[1,tmp11],[2,tmp11],[3,tmp11]
- psllw mm6, 2
-
- pmulhw mm6, fix_141
- punpckldq mm0, mm3 ;wsptr[0,tmp10],[1,tmp10],[2,tmp10],[3,tmp10]
-
- punpckhdq mm2, mm3 ;wsptr[0,tmp13],[1,tmp13],[2,tmp13],[3,tmp13]
- movq mm7, mm0
-
-// tmp0 = tmp10 + tmp13;
-// tmp3 = tmp10 - tmp13;
- paddw mm0, mm2 ;[0,tmp0],[1,tmp0],[2,tmp0],[3,tmp0]
- psubw mm7, mm2 ;[0,tmp3],[1,tmp3],[2,tmp3],[3,tmp3]
-
-// tmp12 = MULTIPLY(tmp14, FIX_1_414213562) - tmp13;
- psubw mm6, mm2 ;wsptr[0,tmp12],[1,tmp12],[2,tmp12],[3,tmp12]
-// tmp1 = tmp11 + tmp12;
-// tmp2 = tmp11 - tmp12;
- movq mm5, mm1
-
-
-
- /* Odd part */
-
-// z13 = (DCTELEM) wsptr[5] + (DCTELEM) wsptr[3];
-// z10 = (DCTELEM) wsptr[5] - (DCTELEM) wsptr[3];
-// z11 = (DCTELEM) wsptr[1] + (DCTELEM) wsptr[7];
-// z12 = (DCTELEM) wsptr[1] - (DCTELEM) wsptr[7];
- movq mm3, [esi+8*0] ;wsptr[0,0],[0,1],[0,2],[0,3]
- paddw mm1, mm6 ;[0,tmp1],[1,tmp1],[2,tmp1],[3,tmp1]
-
- movq mm4, [esi+8*1] ;wsptr[0,4],[0,5],[0,6],[0,7]
- psubw mm5, mm6 ;[0,tmp2],[1,tmp2],[2,tmp2],[3,tmp2]
-
- movq mm6, mm3
- punpckldq mm3, mm4 ;wsptr[0,0],[0,1],[0,4],[0,5]
-
- punpckhdq mm4, mm6 ;wsptr[0,6],[0,7],[0,2],[0,3]
- movq mm2, mm3
-
-//Save tmp0 and tmp1 in wsptr
- movq [esi+8*0], mm0 ;save tmp0
- paddw mm2, mm4 ;wsptr[xxx],[0,z11],[xxx],[0,z13]
-
-
-//Continue with z10 --- z13
- movq mm6, [esi+8*2] ;wsptr[1,0],[1,1],[1,2],[1,3]
- psubw mm3, mm4 ;wsptr[xxx],[0,z12],[xxx],[0,z10]
-
- movq mm0, [esi+8*3] ;wsptr[1,4],[1,5],[1,6],[1,7]
- movq mm4, mm6
-
- movq [esi+8*1], mm1 ;save tmp1
- punpckldq mm6, mm0 ;wsptr[1,0],[1,1],[1,4],[1,5]
-
- punpckhdq mm0, mm4 ;wsptr[1,6],[1,7],[1,2],[1,3]
- movq mm1, mm6
-
-//Save tmp2 and tmp3 in wsptr
- paddw mm6, mm0 ;wsptr[xxx],[1,z11],[xxx],[1,z13]
- movq mm4, mm2
-
-//Continue with z10 --- z13
- movq [esi+8*2], mm5 ;save tmp2
- punpcklwd mm2, mm6 ;wsptr[xxx],[xxx],[0,z11],[1,z11]
-
- psubw mm1, mm0 ;wsptr[xxx],[1,z12],[xxx],[1,z10]
- punpckhwd mm4, mm6 ;wsptr[xxx],[xxx],[0,z13],[1,z13]
-
- movq mm0, mm3
- punpcklwd mm3, mm1 ;wsptr[xxx],[xxx],[0,z12],[1,z12]
-
- movq [esi+8*3], mm7 ;save tmp3
- punpckhwd mm0, mm1 ;wsptr[xxx],[xxx],[0,z10],[1,z10]
-
- movq mm6, [esi+8*4] ;wsptr[2,0],[2,1],[2,2],[2,3]
- punpckhdq mm0, mm2 ;wsptr[0,z10],[1,z10],[0,z11],[1,z11]
-
- movq mm7, [esi+8*5] ;wsptr[2,4],[2,5],[2,6],[2,7]
- punpckhdq mm3, mm4 ;wsptr[0,z12],[1,z12],[0,z13],[1,z13]
-
- movq mm1, [esi+8*6] ;wsptr[3,0],[3,1],[3,2],[3,3]
- movq mm4, mm6
-
- punpckldq mm6, mm7 ;wsptr[2,0],[2,1],[2,4],[2,5]
- movq mm5, mm1
-
- punpckhdq mm7, mm4 ;wsptr[2,6],[2,7],[2,2],[2,3]
- movq mm2, mm6
-
- movq mm4, [esi+8*7] ;wsptr[3,4],[3,5],[3,6],[3,7]
- paddw mm6, mm7 ;wsptr[xxx],[2,z11],[xxx],[2,z13]
-
- psubw mm2, mm7 ;wsptr[xxx],[2,z12],[xxx],[2,z10]
- punpckldq mm1, mm4 ;wsptr[3,0],[3,1],[3,4],[3,5]
-
- punpckhdq mm4, mm5 ;wsptr[3,6],[3,7],[3,2],[3,3]
- movq mm7, mm1
-
- paddw mm1, mm4 ;wsptr[xxx],[3,z11],[xxx],[3,z13]
- psubw mm7, mm4 ;wsptr[xxx],[3,z12],[xxx],[3,z10]
-
- movq mm5, mm6
- punpcklwd mm6, mm1 ;wsptr[xxx],[xxx],[2,z11],[3,z11]
-
- punpckhwd mm5, mm1 ;wsptr[xxx],[xxx],[2,z13],[3,z13]
- movq mm4, mm2
-
- punpcklwd mm2, mm7 ;wsptr[xxx],[xxx],[2,z12],[3,z12]
-
- punpckhwd mm4, mm7 ;wsptr[xxx],[xxx],[2,z10],[3,z10]
-
- punpckhdq mm4, mm6 ;wsptr[2,z10],[3,z10],[2,z11],[3,z11]
-
- punpckhdq mm2, mm5 ;wsptr[2,z12],[3,z12],[2,z13],[3,z13]
- movq mm5, mm0
-
- punpckldq mm0, mm4 ;wsptr[0,z10],[1,z10],[2,z10],[3,z10]
-
- punpckhdq mm5, mm4 ;wsptr[0,z11],[1,z11],[2,z11],[3,z11]
- movq mm4, mm3
-
- punpckhdq mm4, mm2 ;wsptr[0,z13],[1,z13],[2,z13],[3,z13]
- movq mm1, mm5
-
- punpckldq mm3, mm2 ;wsptr[0,z12],[1,z12],[2,z12],[3,z12]
-// tmp7 = z11 + z13; /* phase 5 */
-// tmp8 = z11 - z13; /* phase 5 */
- psubw mm1, mm4 ;tmp8
-
- paddw mm5, mm4 ;tmp7
-// tmp21 = MULTIPLY(tmp8, FIX_1_414213562); /* 2*c4 */
- psllw mm1, 2
-
- psllw mm0, 2
-
- pmulhw mm1, fix_141 ;tmp21
-// tmp20 = MULTIPLY(z12, (FIX_1_082392200- FIX_1_847759065)) /* 2*(c2-c6) */
-// + MULTIPLY(z10, - FIX_1_847759065); /* 2*c2 */
- psllw mm3, 2
- movq mm7, mm0
-
- pmulhw mm7, fix_n184
- movq mm6, mm3
-
- movq mm2, [esi+8*0] ;tmp0,final1
-
- pmulhw mm6, fix_108n184
-// tmp22 = MULTIPLY(z10,(FIX_1_847759065 - FIX_2_613125930)) /* -2*(c2+c6) */
-// + MULTIPLY(z12, FIX_1_847759065); /* 2*c2 */
- movq mm4, mm2 ;final1
-
- pmulhw mm0, fix_184n261
- paddw mm2, mm5 ;tmp0+tmp7,final1
-
- pmulhw mm3, fix_184
- psubw mm4, mm5 ;tmp0-tmp7,final1
-
-// tmp6 = tmp22 - tmp7; /* phase 2 */
- psraw mm2, 5 ;outptr[0,0],[1,0],[2,0],[3,0],final1
-
- paddsw mm2, const_0x0080 ;final1
- paddw mm7, mm6 ;tmp20
- psraw mm4, 5 ;outptr[0,7],[1,7],[2,7],[3,7],final1
-
- paddsw mm4, const_0x0080 ;final1
- paddw mm3, mm0 ;tmp22
-
-// tmp5 = tmp21 - tmp6;
- psubw mm3, mm5 ;tmp6
-
-// tmp4 = tmp20 + tmp5;
- movq mm0, [esi+8*1] ;tmp1,final2
- psubw mm1, mm3 ;tmp5
-
- movq mm6, mm0 ;final2
- paddw mm0, mm3 ;tmp1+tmp6,final2
-
- /* Final output stage: scale down by a factor of 8 and range-limit */
-
-
-// outptr[0] = range_limit[IDESCALE(tmp0 + tmp7, PASS1_BITS+3)
-// & RANGE_MASK];
-// outptr[7] = range_limit[IDESCALE(tmp0 - tmp7, PASS1_BITS+3)
-// & RANGE_MASK]; final1
-
-
-// outptr[1] = range_limit[IDESCALE(tmp1 + tmp6, PASS1_BITS+3)
-// & RANGE_MASK];
-// outptr[6] = range_limit[IDESCALE(tmp1 - tmp6, PASS1_BITS+3)
-// & RANGE_MASK]; final2
- psubw mm6, mm3 ;tmp1-tmp6,final2
- psraw mm0, 5 ;outptr[0,1],[1,1],[2,1],[3,1]
-
- paddsw mm0, const_0x0080
- psraw mm6, 5 ;outptr[0,6],[1,6],[2,6],[3,6]
-
- paddsw mm6, const_0x0080 ;need to check this value
- packuswb mm0, mm4 ;out[0,1],[1,1],[2,1],[3,1],[0,7],[1,7],[2,7],[3,7]
-
- movq mm5, [esi+8*2] ;tmp2,final3
- packuswb mm2, mm6 ;out[0,0],[1,0],[2,0],[3,0],[0,6],[1,6],[2,6],[3,6]
-
-// outptr[2] = range_limit[IDESCALE(tmp2 + tmp5, PASS1_BITS+3)
-// & RANGE_MASK];
-// outptr[5] = range_limit[IDESCALE(tmp2 - tmp5, PASS1_BITS+3)
-// & RANGE_MASK]; final3
- paddw mm7, mm1 ;tmp4
- movq mm3, mm5
-
- paddw mm5, mm1 ;tmp2+tmp5
- psubw mm3, mm1 ;tmp2-tmp5
-
- psraw mm5, 5 ;outptr[0,2],[1,2],[2,2],[3,2]
-
- paddsw mm5, const_0x0080
- movq mm4, [esi+8*3] ;tmp3,final4
- psraw mm3, 5 ;outptr[0,5],[1,5],[2,5],[3,5]
-
- paddsw mm3, const_0x0080
-
-
-// outptr[4] = range_limit[IDESCALE(tmp3 + tmp4, PASS1_BITS+3)
-// & RANGE_MASK];
-// outptr[3] = range_limit[IDESCALE(tmp3 - tmp4, PASS1_BITS+3)
-// & RANGE_MASK]; final4
- movq mm6, mm4
- paddw mm4, mm7 ;tmp3+tmp4
-
- psubw mm6, mm7 ;tmp3-tmp4
- psraw mm4, 5 ;outptr[0,4],[1,4],[2,4],[3,4]
- mov ecx, [eax]
-
- paddsw mm4, const_0x0080
- psraw mm6, 5 ;outptr[0,3],[1,3],[2,3],[3,3]
-
- paddsw mm6, const_0x0080
- packuswb mm5, mm4 ;out[0,2],[1,2],[2,2],[3,2],[0,4],[1,4],[2,4],[3,4]
-
- packuswb mm6, mm3 ;out[0,3],[1,3],[2,3],[3,3],[0,5],[1,5],[2,5],[3,5]
- movq mm4, mm2
-
- movq mm7, mm5
- punpcklbw mm2, mm0 ;out[0,0],[0,1],[1,0],[1,1],[2,0],[2,1],[3,0],[3,1]
-
- punpckhbw mm4, mm0 ;out[0,6],[0,7],[1,6],[1,7],[2,6],[2,7],[3,6],[3,7]
- movq mm1, mm2
-
- punpcklbw mm5, mm6 ;out[0,2],[0,3],[1,2],[1,3],[2,2],[2,3],[3,2],[3,3]
- add eax, 4
-
- punpckhbw mm7, mm6 ;out[0,4],[0,5],[1,4],[1,5],[2,4],[2,5],[3,4],[3,5]
-
- punpcklwd mm2, mm5 ;out[0,0],[0,1],[0,2],[0,3],[1,0],[1,1],[1,2],[1,3]
- add ecx, output_col
-
- movq mm6, mm7
- punpckhwd mm1, mm5 ;out[2,0],[2,1],[2,2],[2,3],[3,0],[3,1],[3,2],[3,3]
-
- movq mm0, mm2
- punpcklwd mm6, mm4 ;out[0,4],[0,5],[0,6],[0,7],[1,4],[1,5],[1,6],[1,7]
-
- mov ebx, [eax]
- punpckldq mm2, mm6 ;out[0,0],[0,1],[0,2],[0,3],[0,4],[0,5],[0,6],[0,7]
-
- add eax, 4
- movq mm3, mm1
-
- add ebx, output_col
- punpckhwd mm7, mm4 ;out[2,4],[2,5],[2,6],[2,7],[3,4],[3,5],[3,6],[3,7]
-
- movq [ecx], mm2
- punpckhdq mm0, mm6 ;out[1,0],[1,1],[1,2],[1,3],[1,4],[1,5],[1,6],[1,7]
-
- mov ecx, [eax]
- add eax, 4
- add ecx, output_col
-
- movq [ebx], mm0
- punpckldq mm1, mm7 ;out[2,0],[2,1],[2,2],[2,3],[2,4],[2,5],[2,6],[2,7]
-
- mov ebx, [eax]
-
- add ebx, output_col
- punpckhdq mm3, mm7 ;out[3,0],[3,1],[3,2],[3,3],[3,4],[3,5],[3,6],[3,7]
- movq [ecx], mm1
-
-
- movq [ebx], mm3
-
-
-
-/*******************************************************************/
-
-
- add esi, 64
- add eax, 4
-
-/*******************************************************************/
-
-// tmp10 = ((DCTELEM) wsptr[0] + (DCTELEM) wsptr[4]);
-// tmp13 = ((DCTELEM) wsptr[2] + (DCTELEM) wsptr[6]);
-// tmp11 = ((DCTELEM) wsptr[0] - (DCTELEM) wsptr[4]);
-// tmp14 = ((DCTELEM) wsptr[2] - (DCTELEM) wsptr[6]);
- movq mm0, [esi+8*0] ;wsptr[0,0],[0,1],[0,2],[0,3]
-
- movq mm1, [esi+8*1] ;wsptr[0,4],[0,5],[0,6],[0,7]
- movq mm2, mm0
-
- movq mm3, [esi+8*2] ;wsptr[1,0],[1,1],[1,2],[1,3]
- paddw mm0, mm1 ;wsptr[0,tmp10],[xxx],[0,tmp13],[xxx]
-
- movq mm4, [esi+8*3] ;wsptr[1,4],[1,5],[1,6],[1,7]
- psubw mm2, mm1 ;wsptr[0,tmp11],[xxx],[0,tmp14],[xxx]
-
- movq mm6, mm0
- movq mm5, mm3
-
- paddw mm3, mm4 ;wsptr[1,tmp10],[xxx],[1,tmp13],[xxx]
- movq mm1, mm2
-
- psubw mm5, mm4 ;wsptr[1,tmp11],[xxx],[1,tmp14],[xxx]
- punpcklwd mm0, mm3 ;wsptr[0,tmp10],[1,tmp10],[xxx],[xxx]
-
- movq mm7, [esi+8*7] ;wsptr[3,4],[3,5],[3,6],[3,7]
- punpckhwd mm6, mm3 ;wsptr[0,tmp13],[1,tmp13],[xxx],[xxx]
-
- movq mm3, [esi+8*4] ;wsptr[2,0],[2,1],[2,2],[2,3]
- punpckldq mm0, mm6 ;wsptr[0,tmp10],[1,tmp10],[0,tmp13],[1,tmp13]
-
- punpcklwd mm1, mm5 ;wsptr[0,tmp11],[1,tmp11],[xxx],[xxx]
- movq mm4, mm3
-
- movq mm6, [esi+8*6] ;wsptr[3,0],[3,1],[3,2],[3,3]
- punpckhwd mm2, mm5 ;wsptr[0,tmp14],[1,tmp14],[xxx],[xxx]
-
- movq mm5, [esi+8*5] ;wsptr[2,4],[2,5],[2,6],[2,7]
- punpckldq mm1, mm2 ;wsptr[0,tmp11],[1,tmp11],[0,tmp14],[1,tmp14]
-
-
- paddw mm3, mm5 ;wsptr[2,tmp10],[xxx],[2,tmp13],[xxx]
- movq mm2, mm6
-
- psubw mm4, mm5 ;wsptr[2,tmp11],[xxx],[2,tmp14],[xxx]
- paddw mm6, mm7 ;wsptr[3,tmp10],[xxx],[3,tmp13],[xxx]
-
- movq mm5, mm3
- punpcklwd mm3, mm6 ;wsptr[2,tmp10],[3,tmp10],[xxx],[xxx]
-
- psubw mm2, mm7 ;wsptr[3,tmp11],[xxx],[3,tmp14],[xxx]
- punpckhwd mm5, mm6 ;wsptr[2,tmp13],[3,tmp13],[xxx],[xxx]
-
- movq mm7, mm4
- punpckldq mm3, mm5 ;wsptr[2,tmp10],[3,tmp10],[2,tmp13],[3,tmp13]
-
- punpcklwd mm4, mm2 ;wsptr[2,tmp11],[3,tmp11],[xxx],[xxx]
-
- punpckhwd mm7, mm2 ;wsptr[2,tmp14],[3,tmp14],[xxx],[xxx]
-
- punpckldq mm4, mm7 ;wsptr[2,tmp11],[3,tmp11],[2,tmp14],[3,tmp14]
- movq mm6, mm1
-
-// mm0 = ;wsptr[0,tmp10],[1,tmp10],[0,tmp13],[1,tmp13]
-// mm1 = ;wsptr[0,tmp11],[1,tmp11],[0,tmp14],[1,tmp14]
-
-
- movq mm2, mm0
- punpckhdq mm6, mm4 ;wsptr[0,tmp14],[1,tmp14],[2,tmp14],[3,tmp14]
-
- punpckldq mm1, mm4 ;wsptr[0,tmp11],[1,tmp11],[2,tmp11],[3,tmp11]
- psllw mm6, 2
-
- pmulhw mm6, fix_141
- punpckldq mm0, mm3 ;wsptr[0,tmp10],[1,tmp10],[2,tmp10],[3,tmp10]
-
- punpckhdq mm2, mm3 ;wsptr[0,tmp13],[1,tmp13],[2,tmp13],[3,tmp13]
- movq mm7, mm0
-
-// tmp0 = tmp10 + tmp13;
-// tmp3 = tmp10 - tmp13;
- paddw mm0, mm2 ;[0,tmp0],[1,tmp0],[2,tmp0],[3,tmp0]
- psubw mm7, mm2 ;[0,tmp3],[1,tmp3],[2,tmp3],[3,tmp3]
-
-// tmp12 = MULTIPLY(tmp14, FIX_1_414213562) - tmp13;
- psubw mm6, mm2 ;wsptr[0,tmp12],[1,tmp12],[2,tmp12],[3,tmp12]
-// tmp1 = tmp11 + tmp12;
-// tmp2 = tmp11 - tmp12;
- movq mm5, mm1
-
-
-
- /* Odd part */
-
-// z13 = (DCTELEM) wsptr[5] + (DCTELEM) wsptr[3];
-// z10 = (DCTELEM) wsptr[5] - (DCTELEM) wsptr[3];
-// z11 = (DCTELEM) wsptr[1] + (DCTELEM) wsptr[7];
-// z12 = (DCTELEM) wsptr[1] - (DCTELEM) wsptr[7];
- movq mm3, [esi+8*0] ;wsptr[0,0],[0,1],[0,2],[0,3]
- paddw mm1, mm6 ;[0,tmp1],[1,tmp1],[2,tmp1],[3,tmp1]
-
- movq mm4, [esi+8*1] ;wsptr[0,4],[0,5],[0,6],[0,7]
- psubw mm5, mm6 ;[0,tmp2],[1,tmp2],[2,tmp2],[3,tmp2]
-
- movq mm6, mm3
- punpckldq mm3, mm4 ;wsptr[0,0],[0,1],[0,4],[0,5]
-
- punpckhdq mm4, mm6 ;wsptr[0,6],[0,7],[0,2],[0,3]
- movq mm2, mm3
-
-//Save tmp0 and tmp1 in wsptr
- movq [esi+8*0], mm0 ;save tmp0
- paddw mm2, mm4 ;wsptr[xxx],[0,z11],[xxx],[0,z13]
-
-
-//Continue with z10 --- z13
- movq mm6, [esi+8*2] ;wsptr[1,0],[1,1],[1,2],[1,3]
- psubw mm3, mm4 ;wsptr[xxx],[0,z12],[xxx],[0,z10]
-
- movq mm0, [esi+8*3] ;wsptr[1,4],[1,5],[1,6],[1,7]
- movq mm4, mm6
-
- movq [esi+8*1], mm1 ;save tmp1
- punpckldq mm6, mm0 ;wsptr[1,0],[1,1],[1,4],[1,5]
-
- punpckhdq mm0, mm4 ;wsptr[1,6],[1,7],[1,2],[1,3]
- movq mm1, mm6
-
-//Save tmp2 and tmp3 in wsptr
- paddw mm6, mm0 ;wsptr[xxx],[1,z11],[xxx],[1,z13]
- movq mm4, mm2
-
-//Continue with z10 --- z13
- movq [esi+8*2], mm5 ;save tmp2
- punpcklwd mm2, mm6 ;wsptr[xxx],[xxx],[0,z11],[1,z11]
-
- psubw mm1, mm0 ;wsptr[xxx],[1,z12],[xxx],[1,z10]
- punpckhwd mm4, mm6 ;wsptr[xxx],[xxx],[0,z13],[1,z13]
-
- movq mm0, mm3
- punpcklwd mm3, mm1 ;wsptr[xxx],[xxx],[0,z12],[1,z12]
-
- movq [esi+8*3], mm7 ;save tmp3
- punpckhwd mm0, mm1 ;wsptr[xxx],[xxx],[0,z10],[1,z10]
-
- movq mm6, [esi+8*4] ;wsptr[2,0],[2,1],[2,2],[2,3]
- punpckhdq mm0, mm2 ;wsptr[0,z10],[1,z10],[0,z11],[1,z11]
-
- movq mm7, [esi+8*5] ;wsptr[2,4],[2,5],[2,6],[2,7]
- punpckhdq mm3, mm4 ;wsptr[0,z12],[1,z12],[0,z13],[1,z13]
-
- movq mm1, [esi+8*6] ;wsptr[3,0],[3,1],[3,2],[3,3]
- movq mm4, mm6
-
- punpckldq mm6, mm7 ;wsptr[2,0],[2,1],[2,4],[2,5]
- movq mm5, mm1
-
- punpckhdq mm7, mm4 ;wsptr[2,6],[2,7],[2,2],[2,3]
- movq mm2, mm6
-
- movq mm4, [esi+8*7] ;wsptr[3,4],[3,5],[3,6],[3,7]
- paddw mm6, mm7 ;wsptr[xxx],[2,z11],[xxx],[2,z13]
-
- psubw mm2, mm7 ;wsptr[xxx],[2,z12],[xxx],[2,z10]
- punpckldq mm1, mm4 ;wsptr[3,0],[3,1],[3,4],[3,5]
-
- punpckhdq mm4, mm5 ;wsptr[3,6],[3,7],[3,2],[3,3]
- movq mm7, mm1
-
- paddw mm1, mm4 ;wsptr[xxx],[3,z11],[xxx],[3,z13]
- psubw mm7, mm4 ;wsptr[xxx],[3,z12],[xxx],[3,z10]
-
- movq mm5, mm6
- punpcklwd mm6, mm1 ;wsptr[xxx],[xxx],[2,z11],[3,z11]
-
- punpckhwd mm5, mm1 ;wsptr[xxx],[xxx],[2,z13],[3,z13]
- movq mm4, mm2
-
- punpcklwd mm2, mm7 ;wsptr[xxx],[xxx],[2,z12],[3,z12]
-
- punpckhwd mm4, mm7 ;wsptr[xxx],[xxx],[2,z10],[3,z10]
-
- punpckhdq mm4, mm6 ;wsptr[2,z10],[3,z10],[2,z11],[3,z11]
-
- punpckhdq mm2, mm5 ;wsptr[2,z12],[3,z12],[2,z13],[3,z13]
- movq mm5, mm0
-
- punpckldq mm0, mm4 ;wsptr[0,z10],[1,z10],[2,z10],[3,z10]
-
- punpckhdq mm5, mm4 ;wsptr[0,z11],[1,z11],[2,z11],[3,z11]
- movq mm4, mm3
-
- punpckhdq mm4, mm2 ;wsptr[0,z13],[1,z13],[2,z13],[3,z13]
- movq mm1, mm5
-
- punpckldq mm3, mm2 ;wsptr[0,z12],[1,z12],[2,z12],[3,z12]
-// tmp7 = z11 + z13; /* phase 5 */
-// tmp8 = z11 - z13; /* phase 5 */
- psubw mm1, mm4 ;tmp8
-
- paddw mm5, mm4 ;tmp7
-// tmp21 = MULTIPLY(tmp8, FIX_1_414213562); /* 2*c4 */
- psllw mm1, 2
-
- psllw mm0, 2
-
- pmulhw mm1, fix_141 ;tmp21
-// tmp20 = MULTIPLY(z12, (FIX_1_082392200- FIX_1_847759065)) /* 2*(c2-c6) */
-// + MULTIPLY(z10, - FIX_1_847759065); /* 2*c2 */
- psllw mm3, 2
- movq mm7, mm0
-
- pmulhw mm7, fix_n184
- movq mm6, mm3
-
- movq mm2, [esi+8*0] ;tmp0,final1
-
- pmulhw mm6, fix_108n184
-// tmp22 = MULTIPLY(z10,(FIX_1_847759065 - FIX_2_613125930)) /* -2*(c2+c6) */
-// + MULTIPLY(z12, FIX_1_847759065); /* 2*c2 */
- movq mm4, mm2 ;final1
-
- pmulhw mm0, fix_184n261
- paddw mm2, mm5 ;tmp0+tmp7,final1
-
- pmulhw mm3, fix_184
- psubw mm4, mm5 ;tmp0-tmp7,final1
-
-// tmp6 = tmp22 - tmp7; /* phase 2 */
- psraw mm2, 5 ;outptr[0,0],[1,0],[2,0],[3,0],final1
-
- paddsw mm2, const_0x0080 ;final1
- paddw mm7, mm6 ;tmp20
- psraw mm4, 5 ;outptr[0,7],[1,7],[2,7],[3,7],final1
-
- paddsw mm4, const_0x0080 ;final1
- paddw mm3, mm0 ;tmp22
-
-// tmp5 = tmp21 - tmp6;
- psubw mm3, mm5 ;tmp6
-
-// tmp4 = tmp20 + tmp5;
- movq mm0, [esi+8*1] ;tmp1,final2
- psubw mm1, mm3 ;tmp5
-
- movq mm6, mm0 ;final2
- paddw mm0, mm3 ;tmp1+tmp6,final2
-
- /* Final output stage: scale down by a factor of 8 and range-limit */
-
-
-// outptr[0] = range_limit[IDESCALE(tmp0 + tmp7, PASS1_BITS+3)
-// & RANGE_MASK];
-// outptr[7] = range_limit[IDESCALE(tmp0 - tmp7, PASS1_BITS+3)
-// & RANGE_MASK]; final1
-
-
-// outptr[1] = range_limit[IDESCALE(tmp1 + tmp6, PASS1_BITS+3)
-// & RANGE_MASK];
-// outptr[6] = range_limit[IDESCALE(tmp1 - tmp6, PASS1_BITS+3)
-// & RANGE_MASK]; final2
- psubw mm6, mm3 ;tmp1-tmp6,final2
- psraw mm0, 5 ;outptr[0,1],[1,1],[2,1],[3,1]
-
- paddsw mm0, const_0x0080
- psraw mm6, 5 ;outptr[0,6],[1,6],[2,6],[3,6]
-
- paddsw mm6, const_0x0080 ;need to check this value
- packuswb mm0, mm4 ;out[0,1],[1,1],[2,1],[3,1],[0,7],[1,7],[2,7],[3,7]
-
- movq mm5, [esi+8*2] ;tmp2,final3
- packuswb mm2, mm6 ;out[0,0],[1,0],[2,0],[3,0],[0,6],[1,6],[2,6],[3,6]
-
-// outptr[2] = range_limit[IDESCALE(tmp2 + tmp5, PASS1_BITS+3)
-// & RANGE_MASK];
-// outptr[5] = range_limit[IDESCALE(tmp2 - tmp5, PASS1_BITS+3)
-// & RANGE_MASK]; final3
- paddw mm7, mm1 ;tmp4
- movq mm3, mm5
-
- paddw mm5, mm1 ;tmp2+tmp5
- psubw mm3, mm1 ;tmp2-tmp5
-
- psraw mm5, 5 ;outptr[0,2],[1,2],[2,2],[3,2]
-
- paddsw mm5, const_0x0080
- movq mm4, [esi+8*3] ;tmp3,final4
- psraw mm3, 5 ;outptr[0,5],[1,5],[2,5],[3,5]
-
- paddsw mm3, const_0x0080
-
-
-// outptr[4] = range_limit[IDESCALE(tmp3 + tmp4, PASS1_BITS+3)
-// & RANGE_MASK];
-// outptr[3] = range_limit[IDESCALE(tmp3 - tmp4, PASS1_BITS+3)
-// & RANGE_MASK]; final4
- movq mm6, mm4
- paddw mm4, mm7 ;tmp3+tmp4
-
- psubw mm6, mm7 ;tmp3-tmp4
- psraw mm4, 5 ;outptr[0,4],[1,4],[2,4],[3,4]
- mov ecx, [eax]
-
- paddsw mm4, const_0x0080
- psraw mm6, 5 ;outptr[0,3],[1,3],[2,3],[3,3]
-
- paddsw mm6, const_0x0080
- packuswb mm5, mm4 ;out[0,2],[1,2],[2,2],[3,2],[0,4],[1,4],[2,4],[3,4]
-
- packuswb mm6, mm3 ;out[0,3],[1,3],[2,3],[3,3],[0,5],[1,5],[2,5],[3,5]
- movq mm4, mm2
-
- movq mm7, mm5
- punpcklbw mm2, mm0 ;out[0,0],[0,1],[1,0],[1,1],[2,0],[2,1],[3,0],[3,1]
-
- punpckhbw mm4, mm0 ;out[0,6],[0,7],[1,6],[1,7],[2,6],[2,7],[3,6],[3,7]
- movq mm1, mm2
-
- punpcklbw mm5, mm6 ;out[0,2],[0,3],[1,2],[1,3],[2,2],[2,3],[3,2],[3,3]
- add eax, 4
-
- punpckhbw mm7, mm6 ;out[0,4],[0,5],[1,4],[1,5],[2,4],[2,5],[3,4],[3,5]
-
- punpcklwd mm2, mm5 ;out[0,0],[0,1],[0,2],[0,3],[1,0],[1,1],[1,2],[1,3]
- add ecx, output_col
-
- movq mm6, mm7
- punpckhwd mm1, mm5 ;out[2,0],[2,1],[2,2],[2,3],[3,0],[3,1],[3,2],[3,3]
-
- movq mm0, mm2
- punpcklwd mm6, mm4 ;out[0,4],[0,5],[0,6],[0,7],[1,4],[1,5],[1,6],[1,7]
-
- mov ebx, [eax]
- punpckldq mm2, mm6 ;out[0,0],[0,1],[0,2],[0,3],[0,4],[0,5],[0,6],[0,7]
-
- add eax, 4
- movq mm3, mm1
-
- add ebx, output_col
- punpckhwd mm7, mm4 ;out[2,4],[2,5],[2,6],[2,7],[3,4],[3,5],[3,6],[3,7]
-
- movq [ecx], mm2
- punpckhdq mm0, mm6 ;out[1,0],[1,1],[1,2],[1,3],[1,4],[1,5],[1,6],[1,7]
-
- mov ecx, [eax]
- add eax, 4
- add ecx, output_col
-
- movq [ebx], mm0
- punpckldq mm1, mm7 ;out[2,0],[2,1],[2,2],[2,3],[2,4],[2,5],[2,6],[2,7]
-
- mov ebx, [eax]
-
- add ebx, output_col
- punpckhdq mm3, mm7 ;out[3,0],[3,1],[3,2],[3,3],[3,4],[3,5],[3,6],[3,7]
- movq [ecx], mm1
-
- movq [ebx], mm3
-
- emms
- }
-}
-#endif
-
-#endif /* DCT_IFAST_SUPPORTED */