text: /*
   * jidctint.c
   *
   * This file was part of the Independent JPEG Group's software.
   * Copyright (C) 1991-1998, Thomas G. Lane.
   * Modification developed 2002-2009 by Guido Vollbeding.
   * libjpeg-turbo Modifications:
   * Copyright (C) 2015, D. R. Commander
   * For conditions of distribution and use, see the accompanying README.ijg
   * file.
   *
   * This file contains a slow-but-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 an algorithm described in
   *   C. Loeffler, A. Ligtenberg and G. Moschytz, "Practical Fast 1-D DCT
   *   Algorithms with 11 Multiplications", Proc. Int'l. Conf. on Acoustics,
   *   Speech, and Signal Processing 1989 (ICASSP '89), pp. 988-991.
   * The primary algorithm described there uses 11 multiplies and 29 adds.
   * We use their alternate method with 12 multiplies and 32 adds.
   * The advantage of this method is that no data path contains more than one
   * multiplication; this allows a very simple and accurate implementation in
   * scaled fixed-point arithmetic, with a minimal number of shifts.
   *
   * We also provide IDCT routines with various output sample block sizes for
   * direct resolution reduction or enlargement without additional resampling:
   * NxN (N=1...16) pixels for one 8x8 input DCT block.
   *
   * For N<8 we simply take the corresponding low-frequency coefficients of
   * the 8x8 input DCT block and apply an NxN point IDCT on the sub-block
   * to yield the downscaled outputs.
   * This can be seen as direct low-pass downsampling from the DCT domain
   * point of view rather than the usual spatial domain point of view,
   * yielding significant computational savings and results at least
   * as good as common bilinear (averaging) spatial downsampling.
   *
   * For N>8 we apply a partial NxN IDCT on the 8 input coefficients as
   * lower frequencies and higher frequencies assumed to be zero.
   * It turns out that the computational effort is similar to the 8x8 IDCT
   * regarding the output size.
   * Furthermore, the scaling and descaling is the same for all IDCT sizes.
   *
   * CAUTION: We rely on the FIX() macro except for the N=1,2,4,8 cases
   * since there would be too many additional constants to pre-calculate.
   */
  
  #define JPEG_INTERNALS
  #include "jinclude.h"
  #include "jpeglib.h"
  #include "jdct.h"               /* Private declarations for DCT subsystem */
  
  #ifdef DCT_ISLOW_SUPPORTED
  
  
  /*
   * This module is specialized to the case DCTSIZE = 8.
   */
  
  #if DCTSIZE != 8
    Sorry, this code only copes with 8x8 DCT blocks. /* deliberate syntax err */
  #endif
  
  
  /*
   * The poop on this scaling stuff is as follows:
   *
   * Each 1-D IDCT step produces outputs which are a factor of sqrt(N)
   * larger than the true IDCT outputs.  The final outputs are therefore
   * a factor of N larger than desired; since N=8 this can be cured by
   * a simple right shift at the end of the algorithm.  The advantage of
   * this arrangement is that we save two multiplications per 1-D IDCT,
   * because the y0 and y4 inputs need not be divided by sqrt(N).
   *
   * We have to do addition and subtraction of the integer inputs, which
   * is no problem, and multiplication by fractional constants, which is
   * a problem to do in integer arithmetic.  We multiply all the constants
   * by CONST_SCALE and convert them to integer constants (thus retaining
   * CONST_BITS bits of precision in the constants).  After doing a
   * multiplication we have to divide the product by CONST_SCALE, with proper
   * rounding, to produce the correct output.  This division can be done
   * cheaply as a right shift of CONST_BITS bits.  We postpone shifting
   * as long as possible so that partial sums can be added together with
   * full fractional precision.
   *
   * The outputs of the first pass are scaled up by PASS1_BITS bits so that
   * they are represented to better-than-integral precision.  These outputs
   * require BITS_IN_JSAMPLE + PASS1_BITS + 3 bits; this fits in a 16-bit word
   * with the recommended scaling.  (To scale up 12-bit sample data further, an
   * intermediate JLONG array would be needed.)
   *
   * To avoid overflow of the 32-bit intermediate results in pass 2, we must
   * have BITS_IN_JSAMPLE + CONST_BITS + PASS1_BITS <= 26.  Error analysis
   * shows that the values given below are the most effective.
   */
  
  #if BITS_IN_JSAMPLE == 8
  #define CONST_BITS  13
  #define PASS1_BITS  2
  #else
  #define CONST_BITS  13
  #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 == 13
  #define FIX_0_298631336  ((JLONG)  2446)        /* FIX(0.298631336) */
  #define FIX_0_390180644  ((JLONG)  3196)        /* FIX(0.390180644) */
  #define FIX_0_541196100  ((JLONG)  4433)        /* FIX(0.541196100) */
  #define FIX_0_765366865  ((JLONG)  6270)        /* FIX(0.765366865) */
  #define FIX_0_899976223  ((JLONG)  7373)        /* FIX(0.899976223) */
  #define FIX_1_175875602  ((JLONG)  9633)        /* FIX(1.175875602) */
  #define FIX_1_501321110  ((JLONG)  12299)       /* FIX(1.501321110) */
  #define FIX_1_847759065  ((JLONG)  15137)       /* FIX(1.847759065) */
  #define FIX_1_961570560  ((JLONG)  16069)       /* FIX(1.961570560) */
  #define FIX_2_053119869  ((JLONG)  16819)       /* FIX(2.053119869) */
  #define FIX_2_562915447  ((JLONG)  20995)       /* FIX(2.562915447) */
  #define FIX_3_072711026  ((JLONG)  25172)       /* FIX(3.072711026) */
  #else
  #define FIX_0_298631336  FIX(0.298631336)
  #define FIX_0_390180644  FIX(0.390180644)
  #define FIX_0_541196100  FIX(0.541196100)
  #define FIX_0_765366865  FIX(0.765366865)
  #define FIX_0_899976223  FIX(0.899976223)
  #define FIX_1_175875602  FIX(1.175875602)
  #define FIX_1_501321110  FIX(1.501321110)
  #define FIX_1_847759065  FIX(1.847759065)
  #define FIX_1_961570560  FIX(1.961570560)
  #define FIX_2_053119869  FIX(2.053119869)
  #define FIX_2_562915447  FIX(2.562915447)
  #define FIX_3_072711026  FIX(3.072711026)
  #endif
  
  
  /* Multiply an JLONG variable by an JLONG constant to yield an JLONG result.
   * For 8-bit samples with the recommended scaling, all the variable
   * and constant values involved are no more than 16 bits wide, so a
   * 16x16->32 bit multiply can be used instead of a full 32x32 multiply.
   * For 12-bit samples, a full 32-bit multiplication will be needed.
   */
  
  #if BITS_IN_JSAMPLE == 8
  #define MULTIPLY(var,const)  MULTIPLY16C16(var,const)
  #else
  #define MULTIPLY(var,const)  ((var) * (const))
  #endif
  
  
  /* Dequantize a coefficient by multiplying it by the multiplier-table
   * entry; produce an int result.  In this module, both inputs and result
   * are 16 bits or less, so either int or short multiply will work.
   */
  
  #define DEQUANTIZE(coef,quantval)  (((ISLOW_MULT_TYPE) (coef)) * (quantval))
  
  
  /*
   * Perform dequantization and inverse DCT on one block of coefficients.
   */
  
  GLOBAL(void)
  jpeg_idct_islow (j_decompress_ptr cinfo, jpeg_component_info * compptr,
                   JCOEFPTR coef_block,
                   JSAMPARRAY output_buf, JDIMENSION output_col)
  {
    JLONG tmp0, tmp1, tmp2, tmp3;
    JLONG tmp10, tmp11, tmp12, tmp13;
    JLONG z1, z2, z3, z4, z5;
    JCOEFPTR inptr;
    ISLOW_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
  
    /* Pass 1: process columns from input, store into work array. */
    /* Note results are scaled up by sqrt(8) compared to a true IDCT; */
    /* furthermore, we scale the results by 2**PASS1_BITS. */
  
    inptr = coef_block;
    quantptr = (ISLOW_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 = LEFT_SHIFT(DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]),
                               PASS1_BITS);
  
        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: reverse the even part of the forward DCT. */
      /* The rotator is sqrt(2)*c(-6). */
  
      z2 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
      z3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
  
      z1 = MULTIPLY(z2 + z3, FIX_0_541196100);
      tmp2 = z1 + MULTIPLY(z3, - FIX_1_847759065);
      tmp3 = z1 + MULTIPLY(z2, FIX_0_765366865);
  
      z2 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
      z3 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
  
      tmp0 = LEFT_SHIFT(z2 + z3, CONST_BITS);
      tmp1 = LEFT_SHIFT(z2 - z3, CONST_BITS);
  
      tmp10 = tmp0 + tmp3;
      tmp13 = tmp0 - tmp3;
      tmp11 = tmp1 + tmp2;
      tmp12 = tmp1 - tmp2;
  
      /* Odd part per figure 8; the matrix is unitary and hence its
       * transpose is its inverse.  i0..i3 are y7,y5,y3,y1 respectively.
       */
  
      tmp0 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
      tmp1 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
      tmp2 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
      tmp3 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
  
      z1 = tmp0 + tmp3;
      z2 = tmp1 + tmp2;
      z3 = tmp0 + tmp2;
      z4 = tmp1 + tmp3;
      z5 = MULTIPLY(z3 + z4, FIX_1_175875602); /* sqrt(2) * c3 */
  
      tmp0 = MULTIPLY(tmp0, FIX_0_298631336); /* sqrt(2) * (-c1+c3+c5-c7) */
      tmp1 = MULTIPLY(tmp1, FIX_2_053119869); /* sqrt(2) * ( c1+c3-c5+c7) */
      tmp2 = MULTIPLY(tmp2, FIX_3_072711026); /* sqrt(2) * ( c1+c3+c5-c7) */
      tmp3 = MULTIPLY(tmp3, FIX_1_501321110); /* sqrt(2) * ( c1+c3-c5-c7) */
      z1 = MULTIPLY(z1, - FIX_0_899976223); /* sqrt(2) * (c7-c3) */
      z2 = MULTIPLY(z2, - FIX_2_562915447); /* sqrt(2) * (-c1-c3) */
      z3 = MULTIPLY(z3, - FIX_1_961570560); /* sqrt(2) * (-c3-c5) */
      z4 = MULTIPLY(z4, - FIX_0_390180644); /* sqrt(2) * (c5-c3) */
  
      z3 += z5;
      z4 += z5;
  
      tmp0 += z1 + z3;
      tmp1 += z2 + z4;
      tmp2 += z2 + z3;
      tmp3 += z1 + z4;
  
      /* Final output stage: inputs are tmp10..tmp13, tmp0..tmp3 */
  
      wsptr[DCTSIZE*0] = (int) DESCALE(tmp10 + tmp3, CONST_BITS-PASS1_BITS);
      wsptr[DCTSIZE*7] = (int) DESCALE(tmp10 - tmp3, CONST_BITS-PASS1_BITS);
      wsptr[DCTSIZE*1] = (int) DESCALE(tmp11 + tmp2, CONST_BITS-PASS1_BITS);
      wsptr[DCTSIZE*6] = (int) DESCALE(tmp11 - tmp2, CONST_BITS-PASS1_BITS);
      wsptr[DCTSIZE*2] = (int) DESCALE(tmp12 + tmp1, CONST_BITS-PASS1_BITS);
      wsptr[DCTSIZE*5] = (int) DESCALE(tmp12 - tmp1, CONST_BITS-PASS1_BITS);
      wsptr[DCTSIZE*3] = (int) DESCALE(tmp13 + tmp0, CONST_BITS-PASS1_BITS);
      wsptr[DCTSIZE*4] = (int) DESCALE(tmp13 - tmp0, CONST_BITS-PASS1_BITS);
  
      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[(int) DESCALE((JLONG) 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: reverse the even part of the forward DCT. */
      /* The rotator is sqrt(2)*c(-6). */
  
      z2 = (JLONG) wsptr[2];
      z3 = (JLONG) wsptr[6];
  
      z1 = MULTIPLY(z2 + z3, FIX_0_541196100);
      tmp2 = z1 + MULTIPLY(z3, - FIX_1_847759065);
      tmp3 = z1 + MULTIPLY(z2, FIX_0_765366865);
  
      tmp0 = LEFT_SHIFT((JLONG) wsptr[0] + (JLONG) wsptr[4], CONST_BITS);
      tmp1 = LEFT_SHIFT((JLONG) wsptr[0] - (JLONG) wsptr[4], CONST_BITS);
  
      tmp10 = tmp0 + tmp3;
      tmp13 = tmp0 - tmp3;
      tmp11 = tmp1 + tmp2;
      tmp12 = tmp1 - tmp2;
  
      /* Odd part per figure 8; the matrix is unitary and hence its
       * transpose is its inverse.  i0..i3 are y7,y5,y3,y1 respectively.
       */
  
      tmp0 = (JLONG) wsptr[7];
      tmp1 = (JLONG) wsptr[5];
      tmp2 = (JLONG) wsptr[3];
      tmp3 = (JLONG) wsptr[1];
  
      z1 = tmp0 + tmp3;
      z2 = tmp1 + tmp2;
      z3 = tmp0 + tmp2;
      z4 = tmp1 + tmp3;
      z5 = MULTIPLY(z3 + z4, FIX_1_175875602); /* sqrt(2) * c3 */
  
      tmp0 = MULTIPLY(tmp0, FIX_0_298631336); /* sqrt(2) * (-c1+c3+c5-c7) */
      tmp1 = MULTIPLY(tmp1, FIX_2_053119869); /* sqrt(2) * ( c1+c3-c5+c7) */
      tmp2 = MULTIPLY(tmp2, FIX_3_072711026); /* sqrt(2) * ( c1+c3+c5-c7) */
      tmp3 = MULTIPLY(tmp3, FIX_1_501321110); /* sqrt(2) * ( c1+c3-c5-c7) */
      z1 = MULTIPLY(z1, - FIX_0_899976223); /* sqrt(2) * (c7-c3) */
      z2 = MULTIPLY(z2, - FIX_2_562915447); /* sqrt(2) * (-c1-c3) */
      z3 = MULTIPLY(z3, - FIX_1_961570560); /* sqrt(2) * (-c3-c5) */
      z4 = MULTIPLY(z4, - FIX_0_390180644); /* sqrt(2) * (c5-c3) */
  
      z3 += z5;
      z4 += z5;
  
      tmp0 += z1 + z3;
      tmp1 += z2 + z4;
      tmp2 += z2 + z3;
      tmp3 += z1 + z4;
  
      /* Final output stage: inputs are tmp10..tmp13, tmp0..tmp3 */
  
      outptr[0] = range_limit[(int) DESCALE(tmp10 + tmp3,
                                            CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[7] = range_limit[(int) DESCALE(tmp10 - tmp3,
                                            CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[1] = range_limit[(int) DESCALE(tmp11 + tmp2,
                                            CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[6] = range_limit[(int) DESCALE(tmp11 - tmp2,
                                            CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[2] = range_limit[(int) DESCALE(tmp12 + tmp1,
                                            CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[5] = range_limit[(int) DESCALE(tmp12 - tmp1,
                                            CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[3] = range_limit[(int) DESCALE(tmp13 + tmp0,
                                            CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[4] = range_limit[(int) DESCALE(tmp13 - tmp0,
                                            CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
  
      wsptr += DCTSIZE;           /* advance pointer to next row */
    }
  }
  
  #ifdef IDCT_SCALING_SUPPORTED
  
  
  /*
   * Perform dequantization and inverse DCT on one block of coefficients,
   * producing a 7x7 output block.
   *
   * Optimized algorithm with 12 multiplications in the 1-D kernel.
   * cK represents sqrt(2) * cos(K*pi/14).
   */
  
  GLOBAL(void)
  jpeg_idct_7x7 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
                 JCOEFPTR coef_block,
                 JSAMPARRAY output_buf, JDIMENSION output_col)
  {
    JLONG tmp0, tmp1, tmp2, tmp10, tmp11, tmp12, tmp13;
    JLONG z1, z2, z3;
    JCOEFPTR inptr;
    ISLOW_MULT_TYPE * quantptr;
    int * wsptr;
    JSAMPROW outptr;
    JSAMPLE *range_limit = IDCT_range_limit(cinfo);
    int ctr;
    int workspace[7*7];   /* buffers data between passes */
    SHIFT_TEMPS
  
    /* Pass 1: process columns from input, store into work array. */
  
    inptr = coef_block;
    quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
    wsptr = workspace;
    for (ctr = 0; ctr < 7; ctr++, inptr++, quantptr++, wsptr++) {
      /* Even part */
  
      tmp13 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
      tmp13 = LEFT_SHIFT(tmp13, CONST_BITS);
      /* Add fudge factor here for final descale. */
      tmp13 += ONE << (CONST_BITS-PASS1_BITS-1);
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
      z2 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
      z3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
  
      tmp10 = MULTIPLY(z2 - z3, FIX(0.881747734));     /* c4 */
      tmp12 = MULTIPLY(z1 - z2, FIX(0.314692123));     /* c6 */
      tmp11 = tmp10 + tmp12 + tmp13 - MULTIPLY(z2, FIX(1.841218003)); /* c2+c4-c6 */
      tmp0 = z1 + z3;
      z2 -= tmp0;
      tmp0 = MULTIPLY(tmp0, FIX(1.274162392)) + tmp13; /* c2 */
      tmp10 += tmp0 - MULTIPLY(z3, FIX(0.077722536));  /* c2-c4-c6 */
      tmp12 += tmp0 - MULTIPLY(z1, FIX(2.470602249));  /* c2+c4+c6 */
      tmp13 += MULTIPLY(z2, FIX(1.414213562));         /* c0 */
  
      /* Odd part */
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
      z2 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
      z3 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
  
      tmp1 = MULTIPLY(z1 + z2, FIX(0.935414347));      /* (c3+c1-c5)/2 */
      tmp2 = MULTIPLY(z1 - z2, FIX(0.170262339));      /* (c3+c5-c1)/2 */
      tmp0 = tmp1 - tmp2;
      tmp1 += tmp2;
      tmp2 = MULTIPLY(z2 + z3, - FIX(1.378756276));    /* -c1 */
      tmp1 += tmp2;
      z2 = MULTIPLY(z1 + z3, FIX(0.613604268));        /* c5 */
      tmp0 += z2;
      tmp2 += z2 + MULTIPLY(z3, FIX(1.870828693));     /* c3+c1-c5 */
  
      /* Final output stage */
  
      wsptr[7*0] = (int) RIGHT_SHIFT(tmp10 + tmp0, CONST_BITS-PASS1_BITS);
      wsptr[7*6] = (int) RIGHT_SHIFT(tmp10 - tmp0, CONST_BITS-PASS1_BITS);
      wsptr[7*1] = (int) RIGHT_SHIFT(tmp11 + tmp1, CONST_BITS-PASS1_BITS);
      wsptr[7*5] = (int) RIGHT_SHIFT(tmp11 - tmp1, CONST_BITS-PASS1_BITS);
      wsptr[7*2] = (int) RIGHT_SHIFT(tmp12 + tmp2, CONST_BITS-PASS1_BITS);
      wsptr[7*4] = (int) RIGHT_SHIFT(tmp12 - tmp2, CONST_BITS-PASS1_BITS);
      wsptr[7*3] = (int) RIGHT_SHIFT(tmp13, CONST_BITS-PASS1_BITS);
    }
  
    /* Pass 2: process 7 rows from work array, store into output array. */
  
    wsptr = workspace;
    for (ctr = 0; ctr < 7; ctr++) {
      outptr = output_buf[ctr] + output_col;
  
      /* Even part */
  
      /* Add fudge factor here for final descale. */
      tmp13 = (JLONG) wsptr[0] + (ONE << (PASS1_BITS+2));
      tmp13 = LEFT_SHIFT(tmp13, CONST_BITS);
  
      z1 = (JLONG) wsptr[2];
      z2 = (JLONG) wsptr[4];
      z3 = (JLONG) wsptr[6];
  
      tmp10 = MULTIPLY(z2 - z3, FIX(0.881747734));     /* c4 */
      tmp12 = MULTIPLY(z1 - z2, FIX(0.314692123));     /* c6 */
      tmp11 = tmp10 + tmp12 + tmp13 - MULTIPLY(z2, FIX(1.841218003)); /* c2+c4-c6 */
      tmp0 = z1 + z3;
      z2 -= tmp0;
      tmp0 = MULTIPLY(tmp0, FIX(1.274162392)) + tmp13; /* c2 */
      tmp10 += tmp0 - MULTIPLY(z3, FIX(0.077722536));  /* c2-c4-c6 */
      tmp12 += tmp0 - MULTIPLY(z1, FIX(2.470602249));  /* c2+c4+c6 */
      tmp13 += MULTIPLY(z2, FIX(1.414213562));         /* c0 */
  
      /* Odd part */
  
      z1 = (JLONG) wsptr[1];
      z2 = (JLONG) wsptr[3];
      z3 = (JLONG) wsptr[5];
  
      tmp1 = MULTIPLY(z1 + z2, FIX(0.935414347));      /* (c3+c1-c5)/2 */
      tmp2 = MULTIPLY(z1 - z2, FIX(0.170262339));      /* (c3+c5-c1)/2 */
      tmp0 = tmp1 - tmp2;
      tmp1 += tmp2;
      tmp2 = MULTIPLY(z2 + z3, - FIX(1.378756276));    /* -c1 */
      tmp1 += tmp2;
      z2 = MULTIPLY(z1 + z3, FIX(0.613604268));        /* c5 */
      tmp0 += z2;
      tmp2 += z2 + MULTIPLY(z3, FIX(1.870828693));     /* c3+c1-c5 */
  
      /* Final output stage */
  
      outptr[0] = range_limit[(int) RIGHT_SHIFT(tmp10 + tmp0,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[6] = range_limit[(int) RIGHT_SHIFT(tmp10 - tmp0,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[1] = range_limit[(int) RIGHT_SHIFT(tmp11 + tmp1,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[5] = range_limit[(int) RIGHT_SHIFT(tmp11 - tmp1,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[2] = range_limit[(int) RIGHT_SHIFT(tmp12 + tmp2,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[4] = range_limit[(int) RIGHT_SHIFT(tmp12 - tmp2,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[3] = range_limit[(int) RIGHT_SHIFT(tmp13,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
  
      wsptr += 7;         /* advance pointer to next row */
    }
  }
  
  
  /*
   * Perform dequantization and inverse DCT on one block of coefficients,
   * producing a reduced-size 6x6 output block.
   *
   * Optimized algorithm with 3 multiplications in the 1-D kernel.
   * cK represents sqrt(2) * cos(K*pi/12).
   */
  
  GLOBAL(void)
  jpeg_idct_6x6 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
                 JCOEFPTR coef_block,
                 JSAMPARRAY output_buf, JDIMENSION output_col)
  {
    JLONG tmp0, tmp1, tmp2, tmp10, tmp11, tmp12;
    JLONG z1, z2, z3;
    JCOEFPTR inptr;
    ISLOW_MULT_TYPE * quantptr;
    int * wsptr;
    JSAMPROW outptr;
    JSAMPLE *range_limit = IDCT_range_limit(cinfo);
    int ctr;
    int workspace[6*6];   /* buffers data between passes */
    SHIFT_TEMPS
  
    /* Pass 1: process columns from input, store into work array. */
  
    inptr = coef_block;
    quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
    wsptr = workspace;
    for (ctr = 0; ctr < 6; ctr++, inptr++, quantptr++, wsptr++) {
      /* Even part */
  
      tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
      tmp0 = LEFT_SHIFT(tmp0, CONST_BITS);
      /* Add fudge factor here for final descale. */
      tmp0 += ONE << (CONST_BITS-PASS1_BITS-1);
      tmp2 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
      tmp10 = MULTIPLY(tmp2, FIX(0.707106781));   /* c4 */
      tmp1 = tmp0 + tmp10;
      tmp11 = RIGHT_SHIFT(tmp0 - tmp10 - tmp10, CONST_BITS-PASS1_BITS);
      tmp10 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
      tmp0 = MULTIPLY(tmp10, FIX(1.224744871));   /* c2 */
      tmp10 = tmp1 + tmp0;
      tmp12 = tmp1 - tmp0;
  
      /* Odd part */
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
      z2 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
      z3 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
      tmp1 = MULTIPLY(z1 + z3, FIX(0.366025404)); /* c5 */
      tmp0 = tmp1 + LEFT_SHIFT(z1 + z2, CONST_BITS);
      tmp2 = tmp1 + LEFT_SHIFT(z3 - z2, CONST_BITS);
      tmp1 = LEFT_SHIFT(z1 - z2 - z3, PASS1_BITS);
  
      /* Final output stage */
  
      wsptr[6*0] = (int) RIGHT_SHIFT(tmp10 + tmp0, CONST_BITS-PASS1_BITS);
      wsptr[6*5] = (int) RIGHT_SHIFT(tmp10 - tmp0, CONST_BITS-PASS1_BITS);
      wsptr[6*1] = (int) (tmp11 + tmp1);
      wsptr[6*4] = (int) (tmp11 - tmp1);
      wsptr[6*2] = (int) RIGHT_SHIFT(tmp12 + tmp2, CONST_BITS-PASS1_BITS);
      wsptr[6*3] = (int) RIGHT_SHIFT(tmp12 - tmp2, CONST_BITS-PASS1_BITS);
    }
  
    /* Pass 2: process 6 rows from work array, store into output array. */
  
    wsptr = workspace;
    for (ctr = 0; ctr < 6; ctr++) {
      outptr = output_buf[ctr] + output_col;
  
      /* Even part */
  
      /* Add fudge factor here for final descale. */
      tmp0 = (JLONG) wsptr[0] + (ONE << (PASS1_BITS+2));
      tmp0 = LEFT_SHIFT(tmp0, CONST_BITS);
      tmp2 = (JLONG) wsptr[4];
      tmp10 = MULTIPLY(tmp2, FIX(0.707106781));   /* c4 */
      tmp1 = tmp0 + tmp10;
      tmp11 = tmp0 - tmp10 - tmp10;
      tmp10 = (JLONG) wsptr[2];
      tmp0 = MULTIPLY(tmp10, FIX(1.224744871));   /* c2 */
      tmp10 = tmp1 + tmp0;
      tmp12 = tmp1 - tmp0;
  
      /* Odd part */
  
      z1 = (JLONG) wsptr[1];
      z2 = (JLONG) wsptr[3];
      z3 = (JLONG) wsptr[5];
      tmp1 = MULTIPLY(z1 + z3, FIX(0.366025404)); /* c5 */
      tmp0 = tmp1 + LEFT_SHIFT(z1 + z2, CONST_BITS);
      tmp2 = tmp1 + LEFT_SHIFT(z3 - z2, CONST_BITS);
      tmp1 = LEFT_SHIFT(z1 - z2 - z3, CONST_BITS);
  
      /* Final output stage */
  
      outptr[0] = range_limit[(int) RIGHT_SHIFT(tmp10 + tmp0,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[5] = range_limit[(int) RIGHT_SHIFT(tmp10 - tmp0,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[1] = range_limit[(int) RIGHT_SHIFT(tmp11 + tmp1,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[4] = range_limit[(int) RIGHT_SHIFT(tmp11 - tmp1,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[2] = range_limit[(int) RIGHT_SHIFT(tmp12 + tmp2,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[3] = range_limit[(int) RIGHT_SHIFT(tmp12 - tmp2,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
  
      wsptr += 6;         /* advance pointer to next row */
    }
  }
  
  
  /*
   * Perform dequantization and inverse DCT on one block of coefficients,
   * producing a reduced-size 5x5 output block.
   *
   * Optimized algorithm with 5 multiplications in the 1-D kernel.
   * cK represents sqrt(2) * cos(K*pi/10).
   */
  
  GLOBAL(void)
  jpeg_idct_5x5 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
                 JCOEFPTR coef_block,
                 JSAMPARRAY output_buf, JDIMENSION output_col)
  {
    JLONG tmp0, tmp1, tmp10, tmp11, tmp12;
    JLONG z1, z2, z3;
    JCOEFPTR inptr;
    ISLOW_MULT_TYPE * quantptr;
    int * wsptr;
    JSAMPROW outptr;
    JSAMPLE *range_limit = IDCT_range_limit(cinfo);
    int ctr;
    int workspace[5*5];   /* buffers data between passes */
    SHIFT_TEMPS
  
    /* Pass 1: process columns from input, store into work array. */
  
    inptr = coef_block;
    quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
    wsptr = workspace;
    for (ctr = 0; ctr < 5; ctr++, inptr++, quantptr++, wsptr++) {
      /* Even part */
  
      tmp12 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
      tmp12 = LEFT_SHIFT(tmp12, CONST_BITS);
      /* Add fudge factor here for final descale. */
      tmp12 += ONE << (CONST_BITS-PASS1_BITS-1);
      tmp0 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
      tmp1 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
      z1 = MULTIPLY(tmp0 + tmp1, FIX(0.790569415)); /* (c2+c4)/2 */
      z2 = MULTIPLY(tmp0 - tmp1, FIX(0.353553391)); /* (c2-c4)/2 */
      z3 = tmp12 + z2;
      tmp10 = z3 + z1;
      tmp11 = z3 - z1;
      tmp12 -= LEFT_SHIFT(z2, 2);
  
      /* Odd part */
  
      z2 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
      z3 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
  
      z1 = MULTIPLY(z2 + z3, FIX(0.831253876));     /* c3 */
      tmp0 = z1 + MULTIPLY(z2, FIX(0.513743148));   /* c1-c3 */
      tmp1 = z1 - MULTIPLY(z3, FIX(2.176250899));   /* c1+c3 */
  
      /* Final output stage */
  
      wsptr[5*0] = (int) RIGHT_SHIFT(tmp10 + tmp0, CONST_BITS-PASS1_BITS);
      wsptr[5*4] = (int) RIGHT_SHIFT(tmp10 - tmp0, CONST_BITS-PASS1_BITS);
      wsptr[5*1] = (int) RIGHT_SHIFT(tmp11 + tmp1, CONST_BITS-PASS1_BITS);
      wsptr[5*3] = (int) RIGHT_SHIFT(tmp11 - tmp1, CONST_BITS-PASS1_BITS);
      wsptr[5*2] = (int) RIGHT_SHIFT(tmp12, CONST_BITS-PASS1_BITS);
    }
  
    /* Pass 2: process 5 rows from work array, store into output array. */
  
    wsptr = workspace;
    for (ctr = 0; ctr < 5; ctr++) {
      outptr = output_buf[ctr] + output_col;
  
      /* Even part */
  
      /* Add fudge factor here for final descale. */
      tmp12 = (JLONG) wsptr[0] + (ONE << (PASS1_BITS+2));
      tmp12 = LEFT_SHIFT(tmp12, CONST_BITS);
      tmp0 = (JLONG) wsptr[2];
      tmp1 = (JLONG) wsptr[4];
      z1 = MULTIPLY(tmp0 + tmp1, FIX(0.790569415)); /* (c2+c4)/2 */
      z2 = MULTIPLY(tmp0 - tmp1, FIX(0.353553391)); /* (c2-c4)/2 */
      z3 = tmp12 + z2;
      tmp10 = z3 + z1;
      tmp11 = z3 - z1;
      tmp12 -= LEFT_SHIFT(z2, 2);
  
      /* Odd part */
  
      z2 = (JLONG) wsptr[1];
      z3 = (JLONG) wsptr[3];
  
      z1 = MULTIPLY(z2 + z3, FIX(0.831253876));     /* c3 */
      tmp0 = z1 + MULTIPLY(z2, FIX(0.513743148));   /* c1-c3 */
      tmp1 = z1 - MULTIPLY(z3, FIX(2.176250899));   /* c1+c3 */
  
      /* Final output stage */
  
      outptr[0] = range_limit[(int) RIGHT_SHIFT(tmp10 + tmp0,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[4] = range_limit[(int) RIGHT_SHIFT(tmp10 - tmp0,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[1] = range_limit[(int) RIGHT_SHIFT(tmp11 + tmp1,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[3] = range_limit[(int) RIGHT_SHIFT(tmp11 - tmp1,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[2] = range_limit[(int) RIGHT_SHIFT(tmp12,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
  
      wsptr += 5;         /* advance pointer to next row */
    }
  }
  
  
  /*
   * Perform dequantization and inverse DCT on one block of coefficients,
   * producing a reduced-size 3x3 output block.
   *
   * Optimized algorithm with 2 multiplications in the 1-D kernel.
   * cK represents sqrt(2) * cos(K*pi/6).
   */
  
  GLOBAL(void)
  jpeg_idct_3x3 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
                 JCOEFPTR coef_block,
                 JSAMPARRAY output_buf, JDIMENSION output_col)
  {
    JLONG tmp0, tmp2, tmp10, tmp12;
    JCOEFPTR inptr;
    ISLOW_MULT_TYPE * quantptr;
    int * wsptr;
    JSAMPROW outptr;
    JSAMPLE *range_limit = IDCT_range_limit(cinfo);
    int ctr;
    int workspace[3*3];   /* buffers data between passes */
    SHIFT_TEMPS
  
    /* Pass 1: process columns from input, store into work array. */
  
    inptr = coef_block;
    quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
    wsptr = workspace;
    for (ctr = 0; ctr < 3; ctr++, inptr++, quantptr++, wsptr++) {
      /* Even part */
  
      tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
      tmp0 = LEFT_SHIFT(tmp0, CONST_BITS);
      /* Add fudge factor here for final descale. */
      tmp0 += ONE << (CONST_BITS-PASS1_BITS-1);
      tmp2 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
      tmp12 = MULTIPLY(tmp2, FIX(0.707106781)); /* c2 */
      tmp10 = tmp0 + tmp12;
      tmp2 = tmp0 - tmp12 - tmp12;
  
      /* Odd part */
  
      tmp12 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
      tmp0 = MULTIPLY(tmp12, FIX(1.224744871)); /* c1 */
  
      /* Final output stage */
  
      wsptr[3*0] = (int) RIGHT_SHIFT(tmp10 + tmp0, CONST_BITS-PASS1_BITS);
      wsptr[3*2] = (int) RIGHT_SHIFT(tmp10 - tmp0, CONST_BITS-PASS1_BITS);
      wsptr[3*1] = (int) RIGHT_SHIFT(tmp2, CONST_BITS-PASS1_BITS);
    }
  
    /* Pass 2: process 3 rows from work array, store into output array. */
  
    wsptr = workspace;
    for (ctr = 0; ctr < 3; ctr++) {
      outptr = output_buf[ctr] + output_col;
  
      /* Even part */
  
      /* Add fudge factor here for final descale. */
      tmp0 = (JLONG) wsptr[0] + (ONE << (PASS1_BITS+2));
      tmp0 = LEFT_SHIFT(tmp0, CONST_BITS);
      tmp2 = (JLONG) wsptr[2];
      tmp12 = MULTIPLY(tmp2, FIX(0.707106781)); /* c2 */
      tmp10 = tmp0 + tmp12;
      tmp2 = tmp0 - tmp12 - tmp12;
  
      /* Odd part */
  
      tmp12 = (JLONG) wsptr[1];
      tmp0 = MULTIPLY(tmp12, FIX(1.224744871)); /* c1 */
  
      /* Final output stage */
  
      outptr[0] = range_limit[(int) RIGHT_SHIFT(tmp10 + tmp0,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[2] = range_limit[(int) RIGHT_SHIFT(tmp10 - tmp0,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[1] = range_limit[(int) RIGHT_SHIFT(tmp2,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
  
      wsptr += 3;         /* advance pointer to next row */
    }
  }
  
  
  /*
   * Perform dequantization and inverse DCT on one block of coefficients,
   * producing a 9x9 output block.
   *
   * Optimized algorithm with 10 multiplications in the 1-D kernel.
   * cK represents sqrt(2) * cos(K*pi/18).
   */
  
  GLOBAL(void)
  jpeg_idct_9x9 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
                 JCOEFPTR coef_block,
                 JSAMPARRAY output_buf, JDIMENSION output_col)
  {
    JLONG tmp0, tmp1, tmp2, tmp3, tmp10, tmp11, tmp12, tmp13, tmp14;
    JLONG z1, z2, z3, z4;
    JCOEFPTR inptr;
    ISLOW_MULT_TYPE * quantptr;
    int * wsptr;
    JSAMPROW outptr;
    JSAMPLE *range_limit = IDCT_range_limit(cinfo);
    int ctr;
    int workspace[8*9];   /* buffers data between passes */
    SHIFT_TEMPS
  
    /* Pass 1: process columns from input, store into work array. */
  
    inptr = coef_block;
    quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
    wsptr = workspace;
    for (ctr = 0; ctr < 8; ctr++, inptr++, quantptr++, wsptr++) {
      /* Even part */
  
      tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
      tmp0 = LEFT_SHIFT(tmp0, CONST_BITS);
      /* Add fudge factor here for final descale. */
      tmp0 += ONE << (CONST_BITS-PASS1_BITS-1);
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
      z2 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
      z3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
  
      tmp3 = MULTIPLY(z3, FIX(0.707106781));      /* c6 */
      tmp1 = tmp0 + tmp3;
      tmp2 = tmp0 - tmp3 - tmp3;
  
      tmp0 = MULTIPLY(z1 - z2, FIX(0.707106781)); /* c6 */
      tmp11 = tmp2 + tmp0;
      tmp14 = tmp2 - tmp0 - tmp0;
  
      tmp0 = MULTIPLY(z1 + z2, FIX(1.328926049)); /* c2 */
      tmp2 = MULTIPLY(z1, FIX(1.083350441));      /* c4 */
      tmp3 = MULTIPLY(z2, FIX(0.245575608));      /* c8 */
  
      tmp10 = tmp1 + tmp0 - tmp3;
      tmp12 = tmp1 - tmp0 + tmp2;
      tmp13 = tmp1 - tmp2 + tmp3;
  
      /* Odd part */
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
      z2 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
      z3 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
      z4 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
  
      z2 = MULTIPLY(z2, - FIX(1.224744871));           /* -c3 */
  
      tmp2 = MULTIPLY(z1 + z3, FIX(0.909038955));      /* c5 */
      tmp3 = MULTIPLY(z1 + z4, FIX(0.483689525));      /* c7 */
      tmp0 = tmp2 + tmp3 - z2;
      tmp1 = MULTIPLY(z3 - z4, FIX(1.392728481));      /* c1 */
      tmp2 += z2 - tmp1;
      tmp3 += z2 + tmp1;
      tmp1 = MULTIPLY(z1 - z3 - z4, FIX(1.224744871)); /* c3 */
  
      /* Final output stage */
  
      wsptr[8*0] = (int) RIGHT_SHIFT(tmp10 + tmp0, CONST_BITS-PASS1_BITS);
      wsptr[8*8] = (int) RIGHT_SHIFT(tmp10 - tmp0, CONST_BITS-PASS1_BITS);
      wsptr[8*1] = (int) RIGHT_SHIFT(tmp11 + tmp1, CONST_BITS-PASS1_BITS);
      wsptr[8*7] = (int) RIGHT_SHIFT(tmp11 - tmp1, CONST_BITS-PASS1_BITS);
      wsptr[8*2] = (int) RIGHT_SHIFT(tmp12 + tmp2, CONST_BITS-PASS1_BITS);
      wsptr[8*6] = (int) RIGHT_SHIFT(tmp12 - tmp2, CONST_BITS-PASS1_BITS);
      wsptr[8*3] = (int) RIGHT_SHIFT(tmp13 + tmp3, CONST_BITS-PASS1_BITS);
      wsptr[8*5] = (int) RIGHT_SHIFT(tmp13 - tmp3, CONST_BITS-PASS1_BITS);
      wsptr[8*4] = (int) RIGHT_SHIFT(tmp14, CONST_BITS-PASS1_BITS);
    }
  
    /* Pass 2: process 9 rows from work array, store into output array. */
  
    wsptr = workspace;
    for (ctr = 0; ctr < 9; ctr++) {
      outptr = output_buf[ctr] + output_col;
  
      /* Even part */
  
      /* Add fudge factor here for final descale. */
      tmp0 = (JLONG) wsptr[0] + (ONE << (PASS1_BITS+2));
      tmp0 = LEFT_SHIFT(tmp0, CONST_BITS);
  
      z1 = (JLONG) wsptr[2];
      z2 = (JLONG) wsptr[4];
      z3 = (JLONG) wsptr[6];
  
      tmp3 = MULTIPLY(z3, FIX(0.707106781));      /* c6 */
      tmp1 = tmp0 + tmp3;
      tmp2 = tmp0 - tmp3 - tmp3;
  
      tmp0 = MULTIPLY(z1 - z2, FIX(0.707106781)); /* c6 */
      tmp11 = tmp2 + tmp0;
      tmp14 = tmp2 - tmp0 - tmp0;
  
      tmp0 = MULTIPLY(z1 + z2, FIX(1.328926049)); /* c2 */
      tmp2 = MULTIPLY(z1, FIX(1.083350441));      /* c4 */
      tmp3 = MULTIPLY(z2, FIX(0.245575608));      /* c8 */
  
      tmp10 = tmp1 + tmp0 - tmp3;
      tmp12 = tmp1 - tmp0 + tmp2;
      tmp13 = tmp1 - tmp2 + tmp3;
  
      /* Odd part */
  
      z1 = (JLONG) wsptr[1];
      z2 = (JLONG) wsptr[3];
      z3 = (JLONG) wsptr[5];
      z4 = (JLONG) wsptr[7];
  
      z2 = MULTIPLY(z2, - FIX(1.224744871));           /* -c3 */
  
      tmp2 = MULTIPLY(z1 + z3, FIX(0.909038955));      /* c5 */
      tmp3 = MULTIPLY(z1 + z4, FIX(0.483689525));      /* c7 */
      tmp0 = tmp2 + tmp3 - z2;
      tmp1 = MULTIPLY(z3 - z4, FIX(1.392728481));      /* c1 */
      tmp2 += z2 - tmp1;
      tmp3 += z2 + tmp1;
      tmp1 = MULTIPLY(z1 - z3 - z4, FIX(1.224744871)); /* c3 */
  
      /* Final output stage */
  
      outptr[0] = range_limit[(int) RIGHT_SHIFT(tmp10 + tmp0,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[8] = range_limit[(int) RIGHT_SHIFT(tmp10 - tmp0,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[1] = range_limit[(int) RIGHT_SHIFT(tmp11 + tmp1,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[7] = range_limit[(int) RIGHT_SHIFT(tmp11 - tmp1,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[2] = range_limit[(int) RIGHT_SHIFT(tmp12 + tmp2,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[6] = range_limit[(int) RIGHT_SHIFT(tmp12 - tmp2,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[3] = range_limit[(int) RIGHT_SHIFT(tmp13 + tmp3,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[5] = range_limit[(int) RIGHT_SHIFT(tmp13 - tmp3,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[4] = range_limit[(int) RIGHT_SHIFT(tmp14,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
  
      wsptr += 8;         /* advance pointer to next row */
    }
  }
  
  
  /*
   * Perform dequantization and inverse DCT on one block of coefficients,
   * producing a 10x10 output block.
   *
   * Optimized algorithm with 12 multiplications in the 1-D kernel.
   * cK represents sqrt(2) * cos(K*pi/20).
   */
  
  GLOBAL(void)
  jpeg_idct_10x10 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
                   JCOEFPTR coef_block,
                   JSAMPARRAY output_buf, JDIMENSION output_col)
  {
    JLONG tmp10, tmp11, tmp12, tmp13, tmp14;
    JLONG tmp20, tmp21, tmp22, tmp23, tmp24;
    JLONG z1, z2, z3, z4, z5;
    JCOEFPTR inptr;
    ISLOW_MULT_TYPE * quantptr;
    int * wsptr;
    JSAMPROW outptr;
    JSAMPLE *range_limit = IDCT_range_limit(cinfo);
    int ctr;
    int workspace[8*10];  /* buffers data between passes */
    SHIFT_TEMPS
  
    /* Pass 1: process columns from input, store into work array. */
  
    inptr = coef_block;
    quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
    wsptr = workspace;
    for (ctr = 0; ctr < 8; ctr++, inptr++, quantptr++, wsptr++) {
      /* Even part */
  
      z3 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
      z3 = LEFT_SHIFT(z3, CONST_BITS);
      /* Add fudge factor here for final descale. */
      z3 += ONE << (CONST_BITS-PASS1_BITS-1);
      z4 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
      z1 = MULTIPLY(z4, FIX(1.144122806));         /* c4 */
      z2 = MULTIPLY(z4, FIX(0.437016024));         /* c8 */
      tmp10 = z3 + z1;
      tmp11 = z3 - z2;
  
      tmp22 = RIGHT_SHIFT(z3 - LEFT_SHIFT(z1 - z2, 1),
                          CONST_BITS-PASS1_BITS);  /* c0 = (c4-c8)*2 */
  
      z2 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
      z3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
  
      z1 = MULTIPLY(z2 + z3, FIX(0.831253876));    /* c6 */
      tmp12 = z1 + MULTIPLY(z2, FIX(0.513743148)); /* c2-c6 */
      tmp13 = z1 - MULTIPLY(z3, FIX(2.176250899)); /* c2+c6 */
  
      tmp20 = tmp10 + tmp12;
      tmp24 = tmp10 - tmp12;
      tmp21 = tmp11 + tmp13;
      tmp23 = tmp11 - tmp13;
  
      /* Odd part */
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
      z2 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
      z3 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
      z4 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
  
      tmp11 = z2 + z4;
      tmp13 = z2 - z4;
  
      tmp12 = MULTIPLY(tmp13, FIX(0.309016994));        /* (c3-c7)/2 */
      z5 = LEFT_SHIFT(z3, CONST_BITS);
  
      z2 = MULTIPLY(tmp11, FIX(0.951056516));           /* (c3+c7)/2 */
      z4 = z5 + tmp12;
  
      tmp10 = MULTIPLY(z1, FIX(1.396802247)) + z2 + z4; /* c1 */
      tmp14 = MULTIPLY(z1, FIX(0.221231742)) - z2 + z4; /* c9 */
  
      z2 = MULTIPLY(tmp11, FIX(0.587785252));           /* (c1-c9)/2 */
      z4 = z5 - tmp12 - LEFT_SHIFT(tmp13, CONST_BITS - 1);
  
      tmp12 = LEFT_SHIFT(z1 - tmp13 - z3, PASS1_BITS);
  
      tmp11 = MULTIPLY(z1, FIX(1.260073511)) - z2 - z4; /* c3 */
      tmp13 = MULTIPLY(z1, FIX(0.642039522)) - z2 + z4; /* c7 */
  
      /* Final output stage */
  
      wsptr[8*0] = (int) RIGHT_SHIFT(tmp20 + tmp10, CONST_BITS-PASS1_BITS);
      wsptr[8*9] = (int) RIGHT_SHIFT(tmp20 - tmp10, CONST_BITS-PASS1_BITS);
      wsptr[8*1] = (int) RIGHT_SHIFT(tmp21 + tmp11, CONST_BITS-PASS1_BITS);
      wsptr[8*8] = (int) RIGHT_SHIFT(tmp21 - tmp11, CONST_BITS-PASS1_BITS);
      wsptr[8*2] = (int) (tmp22 + tmp12);
      wsptr[8*7] = (int) (tmp22 - tmp12);
      wsptr[8*3] = (int) RIGHT_SHIFT(tmp23 + tmp13, CONST_BITS-PASS1_BITS);
      wsptr[8*6] = (int) RIGHT_SHIFT(tmp23 - tmp13, CONST_BITS-PASS1_BITS);
      wsptr[8*4] = (int) RIGHT_SHIFT(tmp24 + tmp14, CONST_BITS-PASS1_BITS);
      wsptr[8*5] = (int) RIGHT_SHIFT(tmp24 - tmp14, CONST_BITS-PASS1_BITS);
    }
  
    /* Pass 2: process 10 rows from work array, store into output array. */
  
    wsptr = workspace;
    for (ctr = 0; ctr < 10; ctr++) {
      outptr = output_buf[ctr] + output_col;
  
      /* Even part */
  
      /* Add fudge factor here for final descale. */
      z3 = (JLONG) wsptr[0] + (ONE << (PASS1_BITS+2));
      z3 = LEFT_SHIFT(z3, CONST_BITS);
      z4 = (JLONG) wsptr[4];
      z1 = MULTIPLY(z4, FIX(1.144122806));         /* c4 */
      z2 = MULTIPLY(z4, FIX(0.437016024));         /* c8 */
      tmp10 = z3 + z1;
      tmp11 = z3 - z2;
  
      tmp22 = z3 - LEFT_SHIFT(z1 - z2, 1);         /* c0 = (c4-c8)*2 */
  
      z2 = (JLONG) wsptr[2];
      z3 = (JLONG) wsptr[6];
  
      z1 = MULTIPLY(z2 + z3, FIX(0.831253876));    /* c6 */
      tmp12 = z1 + MULTIPLY(z2, FIX(0.513743148)); /* c2-c6 */
      tmp13 = z1 - MULTIPLY(z3, FIX(2.176250899)); /* c2+c6 */
  
      tmp20 = tmp10 + tmp12;
      tmp24 = tmp10 - tmp12;
      tmp21 = tmp11 + tmp13;
      tmp23 = tmp11 - tmp13;
  
      /* Odd part */
  
      z1 = (JLONG) wsptr[1];
      z2 = (JLONG) wsptr[3];
      z3 = (JLONG) wsptr[5];
      z3 = LEFT_SHIFT(z3, CONST_BITS);
      z4 = (JLONG) wsptr[7];
  
      tmp11 = z2 + z4;
      tmp13 = z2 - z4;
  
      tmp12 = MULTIPLY(tmp13, FIX(0.309016994));        /* (c3-c7)/2 */
  
      z2 = MULTIPLY(tmp11, FIX(0.951056516));           /* (c3+c7)/2 */
      z4 = z3 + tmp12;
  
      tmp10 = MULTIPLY(z1, FIX(1.396802247)) + z2 + z4; /* c1 */
      tmp14 = MULTIPLY(z1, FIX(0.221231742)) - z2 + z4; /* c9 */
  
      z2 = MULTIPLY(tmp11, FIX(0.587785252));           /* (c1-c9)/2 */
      z4 = z3 - tmp12 - LEFT_SHIFT(tmp13, CONST_BITS - 1);
  
      tmp12 = LEFT_SHIFT(z1 - tmp13, CONST_BITS) - z3;
  
      tmp11 = MULTIPLY(z1, FIX(1.260073511)) - z2 - z4; /* c3 */
      tmp13 = MULTIPLY(z1, FIX(0.642039522)) - z2 + z4; /* c7 */
  
      /* Final output stage */
  
      outptr[0] = range_limit[(int) RIGHT_SHIFT(tmp20 + tmp10,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[9] = range_limit[(int) RIGHT_SHIFT(tmp20 - tmp10,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[1] = range_limit[(int) RIGHT_SHIFT(tmp21 + tmp11,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[8] = range_limit[(int) RIGHT_SHIFT(tmp21 - tmp11,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[2] = range_limit[(int) RIGHT_SHIFT(tmp22 + tmp12,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[7] = range_limit[(int) RIGHT_SHIFT(tmp22 - tmp12,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[3] = range_limit[(int) RIGHT_SHIFT(tmp23 + tmp13,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[6] = range_limit[(int) RIGHT_SHIFT(tmp23 - tmp13,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[4] = range_limit[(int) RIGHT_SHIFT(tmp24 + tmp14,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
      outptr[5] = range_limit[(int) RIGHT_SHIFT(tmp24 - tmp14,
                                                CONST_BITS+PASS1_BITS+3)
                              & RANGE_MASK];
  
      wsptr += 8;         /* advance pointer to next row */
    }
  }
  
  
  /*
   * Perform dequantization and inverse DCT on one block of coefficients,
   * producing a 11x11 output block.
   *
   * Optimized algorithm with 24 multiplications in the 1-D kernel.
   * cK represents sqrt(2) * cos(K*pi/22).
   */
  
  GLOBAL(void)
  jpeg_idct_11x11 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
                   JCOEFPTR coef_block,
                   JSAMPARRAY output_buf, JDIMENSION output_col)
  {
    JLONG tmp10, tmp11, tmp12, tmp13, tmp14;
    JLONG tmp20, tmp21, tmp22, tmp23, tmp24, tmp25;
    JLONG z1, z2, z3, z4;
    JCOEFPTR inptr;
    ISLOW_MULT_TYPE * quantptr;
    int * wsptr;
    JSAMPROW outptr;
    JSAMPLE *range_limit = IDCT_range_limit(cinfo);
    int ctr;
    int workspace[8*11];  /* buffers data between passes */
    SHIFT_TEMPS
  
    /* Pass 1: process columns from input, store into work array. */
  
    inptr = coef_block;
    quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
    wsptr = workspace;
    for (ctr = 0; ctr < 8; ctr++, inptr++, quantptr++, wsptr++) {
      /* Even part */
  
      tmp10 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
      tmp10 = LEFT_SHIFT(tmp10, CONST_BITS);
      /* Add fudge factor here for final descale. */
      tmp10 += ONE << (CONST_BITS-PASS1_BITS-1);
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
      z2 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
      z3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
  
      tmp20 = MULTIPLY(z2 - z3, FIX(2.546640132));     /* c2+c4 */
      tmp23 = MULTIPLY(z2 - z1, FIX(0.430815045));     /* c2-c6 */
      z4 = z1 + z3;
      tmp24 = MULTIPLY(z4, - FIX(1.155664402));        /* -(c2-c10) */
      z4 -= z2;
      tmp25 = tmp10 + MULTIPLY(z4, FIX(1.356927976));  /* c2 */
      tmp21 = tmp20 + tmp23 + tmp25 -
              MULTIPLY(z2, FIX(1.821790775));          /* c2+c4+c10-c6 */
      tmp20 += tmp25 + MULTIPLY(z3, FIX(2.115825087)); /* c4+c6 */
      tmp23 += tmp25 - MULTIPLY(z1, FIX(1.513598477)); /* c6+c8 */
      tmp24 += tmp25;
      tmp22 = tmp24 - MULTIPLY(z3, FIX(0.788749120));  /* c8+c10 */
      tmp24 += MULTIPLY(z2, FIX(1.944413522)) -        /* c2+c8 */
               MULTIPLY(z1, FIX(1.390975730));         /* c4+c10 */
      tmp25 = tmp10 - MULTIPLY(z4, FIX(1.414213562));  /* c0 */
  
      /* Odd part */
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
      z2 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
      z3 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
      z4 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
  
      tmp11 = z1 + z2;
      tmp14 = MULTIPLY(tmp11 + z3 + z4, FIX(0.398430003)); /* c9 */
      tmp11 = MULTIPLY(tmp11, FIX(0.887983902));           /* c3-c9 */
      tmp12 = MULTIPLY(z1 + z3, FIX(0.670361295));         /* c5-c9 */
      tmp13 = tmp14 + MULTIPLY(z1 + z4, FIX(0.366151574)); /* c7-c9 */
      tmp10 = tmp11 + tmp12 + tmp13 -
              MULTIPLY(z1, FIX(0.923107866));              /* c7+c5+c3-c1-2*c9 */
      z1    = tmp14 - MULTIPLY(z2 + z3, FIX(1.163011579)); /* c7+c9 */
      tmp11 += z1 + MULTIPLY(z2, FIX(2.073276588));        /* c1+c7+3*c9-c3 */
      tmp12 += z1 - MULTIPLY(z3, FIX(1.192193623));        /* c3+c5-c7-c9 */
      z1    = MULTIPLY(z2 + z4, - FIX(1.798248910));       /* -(c1+c9) */
      tmp11 += z1;
      tmp13 += z1 + MULTIPLY(z4, FIX(2.102458632));        /* c1+c5+c9-c7 */
      tmp14 += MULTIPLY(z2, - FIX(1.467221301)) +          /* -(c5+c9) */
               MULTIPLY(z3, FIX(1.001388905)) -            /* c1-c9 */
               MULTIPLY(z4, FIX(1.684843907));             /* c3+c9 */
  
      /* Final output stage */
  
      wsptr[8*0]  = (int) RIGHT_SHIFT(tmp20 + tmp10, CONST_BITS-PASS1_BITS);
      wsptr[8*10] = (int) RIGHT_SHIFT(tmp20 - tmp10, CONST_BITS-PASS1_BITS);
      wsptr[8*1]  = (int) RIGHT_SHIFT(tmp21 + tmp11, CONST_BITS-PASS1_BITS);
      wsptr[8*9]  = (int) RIGHT_SHIFT(tmp21 - tmp11, CONST_BITS-PASS1_BITS);
      wsptr[8*2]  = (int) RIGHT_SHIFT(tmp22 + tmp12, CONST_BITS-PASS1_BITS);
      wsptr[8*8]  = (int) RIGHT_SHIFT(tmp22 - tmp12, CONST_BITS-PASS1_BITS);
      wsptr[8*3]  = (int) RIGHT_SHIFT(tmp23 + tmp13, CONST_BITS-PASS1_BITS);
      wsptr[8*7]  = (int) RIGHT_SHIFT(tmp23 - tmp13, CONST_BITS-PASS1_BITS);
      wsptr[8*4]  = (int) RIGHT_SHIFT(tmp24 + tmp14, CONST_BITS-PASS1_BITS);
      wsptr[8*6]  = (int) RIGHT_SHIFT(tmp24 - tmp14, CONST_BITS-PASS1_BITS);
      wsptr[8*5]  = (int) RIGHT_SHIFT(tmp25, CONST_BITS-PASS1_BITS);
    }
  
    /* Pass 2: process 11 rows from work array, store into output array. */
  
    wsptr = workspace;
    for (ctr = 0; ctr < 11; ctr++) {
      outptr = output_buf[ctr] + output_col;
  
      /* Even part */
  
      /* Add fudge factor here for final descale. */
      tmp10 = (JLONG) wsptr[0] + (ONE << (PASS1_BITS+2));
      tmp10 = LEFT_SHIFT(tmp10, CONST_BITS);
  
      z1 = (JLONG) wsptr[2];
      z2 = (JLONG) wsptr[4];
      z3 = (JLONG) wsptr[6];
  
      tmp20 = MULTIPLY(z2 - z3, FIX(2.546640132));     /* c2+c4 */
      tmp23 = MULTIPLY(z2 - z1, FIX(0.430815045));     /* c2-c6 */
      z4 = z1 + z3;
      tmp24 = MULTIPLY(z4, - FIX(1.155664402));        /* -(c2-c10) */
      z4 -= z2;
      tmp25 = tmp10 + MULTIPLY(z4, FIX(1.356927976));  /* c2 */
      tmp21 = tmp20 + tmp23 + tmp25 -
              MULTIPLY(z2, FIX(1.821790775));          /* c2+c4+c10-c6 */
      tmp20 += tmp25 + MULTIPLY(z3, FIX(2.115825087)); /* c4+c6 */
      tmp23 += tmp25 - MULTIPLY(z1, FIX(1.513598477)); /* c6+c8 */
      tmp24 += tmp25;
      tmp22 = tmp24 - MULTIPLY(z3, FIX(0.788749120));  /* c8+c10 */
      tmp24 += MULTIPLY(z2, FIX(1.944413522)) -        /* c2+c8 */
               MULTIPLY(z1, FIX(1.390975730));         /* c4+c10 */
      tmp25 = tmp10 - MULTIPLY(z4, FIX(1.414213562));  /* c0 */
  
      /* Odd part */
  
      z1 = (JLONG) wsptr[1];
      z2 = (JLONG) wsptr[3];
      z3 = (JLONG) wsptr[5];
      z4 = (JLONG) wsptr[7];
  
      tmp11 = z1 + z2;
      tmp14 = MULTIPLY(tmp11 + z3 + z4, FIX(0.398430003)); /* c9 */
      tmp11 = MULTIPLY(tmp11, FIX(0.887983902));           /* c3-c9 */
      tmp12 = MULTIPLY(z1 + z3, FIX(0.670361295));         /* c5-c9 */
      tmp13 = tmp14 + MULTIPLY(z1 + z4, FIX(0.366151574)); /* c7-c9 */
      tmp10 = tmp11 + tmp12 + tmp13 -
              MULTIPLY(z1, FIX(0.923107866));              /* c7+c5+c3-c1-2*c9 */
      z1    = tmp14 - MULTIPLY(z2 + z3, FIX(1.163011579)); /* c7+c9 */
      tmp11 += z1 + MULTIPLY(z2, FIX(2.073276588));        /* c1+c7+3*c9-c3 */
      tmp12 += z1 - MULTIPLY(z3, FIX(1.192193623));        /* c3+c5-c7-c9 */
      z1    = MULTIPLY(z2 + z4, - FIX(1.798248910));       /* -(c1+c9) */
      tmp11 += z1;
      tmp13 += z1 + MULTIPLY(z4, FIX(2.102458632));        /* c1+c5+c9-c7 */
      tmp14 += MULTIPLY(z2, - FIX(1.467221301)) +          /* -(c5+c9) */
               MULTIPLY(z3, FIX(1.001388905)) -            /* c1-c9 */
               MULTIPLY(z4, FIX(1.684843907));             /* c3+c9 */
  
      /* Final output stage */
  
      outptr[0]  = range_limit[(int) RIGHT_SHIFT(tmp20 + tmp10,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[10] = range_limit[(int) RIGHT_SHIFT(tmp20 - tmp10,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[1]  = range_limit[(int) RIGHT_SHIFT(tmp21 + tmp11,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[9]  = range_limit[(int) RIGHT_SHIFT(tmp21 - tmp11,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[2]  = range_limit[(int) RIGHT_SHIFT(tmp22 + tmp12,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[8]  = range_limit[(int) RIGHT_SHIFT(tmp22 - tmp12,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[3]  = range_limit[(int) RIGHT_SHIFT(tmp23 + tmp13,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[7]  = range_limit[(int) RIGHT_SHIFT(tmp23 - tmp13,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[4]  = range_limit[(int) RIGHT_SHIFT(tmp24 + tmp14,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[6]  = range_limit[(int) RIGHT_SHIFT(tmp24 - tmp14,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[5]  = range_limit[(int) RIGHT_SHIFT(tmp25,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
  
      wsptr += 8;         /* advance pointer to next row */
    }
  }
  
  
  /*
   * Perform dequantization and inverse DCT on one block of coefficients,
   * producing a 12x12 output block.
   *
   * Optimized algorithm with 15 multiplications in the 1-D kernel.
   * cK represents sqrt(2) * cos(K*pi/24).
   */
  
  GLOBAL(void)
  jpeg_idct_12x12 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
                   JCOEFPTR coef_block,
                   JSAMPARRAY output_buf, JDIMENSION output_col)
  {
    JLONG tmp10, tmp11, tmp12, tmp13, tmp14, tmp15;
    JLONG tmp20, tmp21, tmp22, tmp23, tmp24, tmp25;
    JLONG z1, z2, z3, z4;
    JCOEFPTR inptr;
    ISLOW_MULT_TYPE * quantptr;
    int * wsptr;
    JSAMPROW outptr;
    JSAMPLE *range_limit = IDCT_range_limit(cinfo);
    int ctr;
    int workspace[8*12];  /* buffers data between passes */
    SHIFT_TEMPS
  
    /* Pass 1: process columns from input, store into work array. */
  
    inptr = coef_block;
    quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
    wsptr = workspace;
    for (ctr = 0; ctr < 8; ctr++, inptr++, quantptr++, wsptr++) {
      /* Even part */
  
      z3 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
      z3 = LEFT_SHIFT(z3, CONST_BITS);
      /* Add fudge factor here for final descale. */
      z3 += ONE << (CONST_BITS-PASS1_BITS-1);
  
      z4 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
      z4 = MULTIPLY(z4, FIX(1.224744871)); /* c4 */
  
      tmp10 = z3 + z4;
      tmp11 = z3 - z4;
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
      z4 = MULTIPLY(z1, FIX(1.366025404)); /* c2 */
      z1 = LEFT_SHIFT(z1, CONST_BITS);
      z2 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
      z2 = LEFT_SHIFT(z2, CONST_BITS);
  
      tmp12 = z1 - z2;
  
      tmp21 = z3 + tmp12;
      tmp24 = z3 - tmp12;
  
      tmp12 = z4 + z2;
  
      tmp20 = tmp10 + tmp12;
      tmp25 = tmp10 - tmp12;
  
      tmp12 = z4 - z1 - z2;
  
      tmp22 = tmp11 + tmp12;
      tmp23 = tmp11 - tmp12;
  
      /* Odd part */
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
      z2 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
      z3 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
      z4 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
  
      tmp11 = MULTIPLY(z2, FIX(1.306562965));                  /* c3 */
      tmp14 = MULTIPLY(z2, - FIX_0_541196100);                 /* -c9 */
  
      tmp10 = z1 + z3;
      tmp15 = MULTIPLY(tmp10 + z4, FIX(0.860918669));          /* c7 */
      tmp12 = tmp15 + MULTIPLY(tmp10, FIX(0.261052384));       /* c5-c7 */
      tmp10 = tmp12 + tmp11 + MULTIPLY(z1, FIX(0.280143716));  /* c1-c5 */
      tmp13 = MULTIPLY(z3 + z4, - FIX(1.045510580));           /* -(c7+c11) */
      tmp12 += tmp13 + tmp14 - MULTIPLY(z3, FIX(1.478575242)); /* c1+c5-c7-c11 */
      tmp13 += tmp15 - tmp11 + MULTIPLY(z4, FIX(1.586706681)); /* c1+c11 */
      tmp15 += tmp14 - MULTIPLY(z1, FIX(0.676326758)) -        /* c7-c11 */
               MULTIPLY(z4, FIX(1.982889723));                 /* c5+c7 */
  
      z1 -= z4;
      z2 -= z3;
      z3 = MULTIPLY(z1 + z2, FIX_0_541196100);                 /* c9 */
      tmp11 = z3 + MULTIPLY(z1, FIX_0_765366865);              /* c3-c9 */
      tmp14 = z3 - MULTIPLY(z2, FIX_1_847759065);              /* c3+c9 */
  
      /* Final output stage */
  
      wsptr[8*0]  = (int) RIGHT_SHIFT(tmp20 + tmp10, CONST_BITS-PASS1_BITS);
      wsptr[8*11] = (int) RIGHT_SHIFT(tmp20 - tmp10, CONST_BITS-PASS1_BITS);
      wsptr[8*1]  = (int) RIGHT_SHIFT(tmp21 + tmp11, CONST_BITS-PASS1_BITS);
      wsptr[8*10] = (int) RIGHT_SHIFT(tmp21 - tmp11, CONST_BITS-PASS1_BITS);
      wsptr[8*2]  = (int) RIGHT_SHIFT(tmp22 + tmp12, CONST_BITS-PASS1_BITS);
      wsptr[8*9]  = (int) RIGHT_SHIFT(tmp22 - tmp12, CONST_BITS-PASS1_BITS);
      wsptr[8*3]  = (int) RIGHT_SHIFT(tmp23 + tmp13, CONST_BITS-PASS1_BITS);
      wsptr[8*8]  = (int) RIGHT_SHIFT(tmp23 - tmp13, CONST_BITS-PASS1_BITS);
      wsptr[8*4]  = (int) RIGHT_SHIFT(tmp24 + tmp14, CONST_BITS-PASS1_BITS);
      wsptr[8*7]  = (int) RIGHT_SHIFT(tmp24 - tmp14, CONST_BITS-PASS1_BITS);
      wsptr[8*5]  = (int) RIGHT_SHIFT(tmp25 + tmp15, CONST_BITS-PASS1_BITS);
      wsptr[8*6]  = (int) RIGHT_SHIFT(tmp25 - tmp15, CONST_BITS-PASS1_BITS);
    }
  
    /* Pass 2: process 12 rows from work array, store into output array. */
  
    wsptr = workspace;
    for (ctr = 0; ctr < 12; ctr++) {
      outptr = output_buf[ctr] + output_col;
  
      /* Even part */
  
      /* Add fudge factor here for final descale. */
      z3 = (JLONG) wsptr[0] + (ONE << (PASS1_BITS+2));
      z3 = LEFT_SHIFT(z3, CONST_BITS);
  
      z4 = (JLONG) wsptr[4];
      z4 = MULTIPLY(z4, FIX(1.224744871)); /* c4 */
  
      tmp10 = z3 + z4;
      tmp11 = z3 - z4;
  
      z1 = (JLONG) wsptr[2];
      z4 = MULTIPLY(z1, FIX(1.366025404)); /* c2 */
      z1 = LEFT_SHIFT(z1, CONST_BITS);
      z2 = (JLONG) wsptr[6];
      z2 = LEFT_SHIFT(z2, CONST_BITS);
  
      tmp12 = z1 - z2;
  
      tmp21 = z3 + tmp12;
      tmp24 = z3 - tmp12;
  
      tmp12 = z4 + z2;
  
      tmp20 = tmp10 + tmp12;
      tmp25 = tmp10 - tmp12;
  
      tmp12 = z4 - z1 - z2;
  
      tmp22 = tmp11 + tmp12;
      tmp23 = tmp11 - tmp12;
  
      /* Odd part */
  
      z1 = (JLONG) wsptr[1];
      z2 = (JLONG) wsptr[3];
      z3 = (JLONG) wsptr[5];
      z4 = (JLONG) wsptr[7];
  
      tmp11 = MULTIPLY(z2, FIX(1.306562965));                  /* c3 */
      tmp14 = MULTIPLY(z2, - FIX_0_541196100);                 /* -c9 */
  
      tmp10 = z1 + z3;
      tmp15 = MULTIPLY(tmp10 + z4, FIX(0.860918669));          /* c7 */
      tmp12 = tmp15 + MULTIPLY(tmp10, FIX(0.261052384));       /* c5-c7 */
      tmp10 = tmp12 + tmp11 + MULTIPLY(z1, FIX(0.280143716));  /* c1-c5 */
      tmp13 = MULTIPLY(z3 + z4, - FIX(1.045510580));           /* -(c7+c11) */
      tmp12 += tmp13 + tmp14 - MULTIPLY(z3, FIX(1.478575242)); /* c1+c5-c7-c11 */
      tmp13 += tmp15 - tmp11 + MULTIPLY(z4, FIX(1.586706681)); /* c1+c11 */
      tmp15 += tmp14 - MULTIPLY(z1, FIX(0.676326758)) -        /* c7-c11 */
               MULTIPLY(z4, FIX(1.982889723));                 /* c5+c7 */
  
      z1 -= z4;
      z2 -= z3;
      z3 = MULTIPLY(z1 + z2, FIX_0_541196100);                 /* c9 */
      tmp11 = z3 + MULTIPLY(z1, FIX_0_765366865);              /* c3-c9 */
      tmp14 = z3 - MULTIPLY(z2, FIX_1_847759065);              /* c3+c9 */
  
      /* Final output stage */
  
      outptr[0]  = range_limit[(int) RIGHT_SHIFT(tmp20 + tmp10,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[11] = range_limit[(int) RIGHT_SHIFT(tmp20 - tmp10,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[1]  = range_limit[(int) RIGHT_SHIFT(tmp21 + tmp11,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[10] = range_limit[(int) RIGHT_SHIFT(tmp21 - tmp11,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[2]  = range_limit[(int) RIGHT_SHIFT(tmp22 + tmp12,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[9]  = range_limit[(int) RIGHT_SHIFT(tmp22 - tmp12,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[3]  = range_limit[(int) RIGHT_SHIFT(tmp23 + tmp13,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[8]  = range_limit[(int) RIGHT_SHIFT(tmp23 - tmp13,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[4]  = range_limit[(int) RIGHT_SHIFT(tmp24 + tmp14,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[7]  = range_limit[(int) RIGHT_SHIFT(tmp24 - tmp14,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[5]  = range_limit[(int) RIGHT_SHIFT(tmp25 + tmp15,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[6]  = range_limit[(int) RIGHT_SHIFT(tmp25 - tmp15,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
  
      wsptr += 8;         /* advance pointer to next row */
    }
  }
  
  
  /*
   * Perform dequantization and inverse DCT on one block of coefficients,
   * producing a 13x13 output block.
   *
   * Optimized algorithm with 29 multiplications in the 1-D kernel.
   * cK represents sqrt(2) * cos(K*pi/26).
   */
  
  GLOBAL(void)
  jpeg_idct_13x13 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
                   JCOEFPTR coef_block,
                   JSAMPARRAY output_buf, JDIMENSION output_col)
  {
    JLONG tmp10, tmp11, tmp12, tmp13, tmp14, tmp15;
    JLONG tmp20, tmp21, tmp22, tmp23, tmp24, tmp25, tmp26;
    JLONG z1, z2, z3, z4;
    JCOEFPTR inptr;
    ISLOW_MULT_TYPE * quantptr;
    int * wsptr;
    JSAMPROW outptr;
    JSAMPLE *range_limit = IDCT_range_limit(cinfo);
    int ctr;
    int workspace[8*13];  /* buffers data between passes */
    SHIFT_TEMPS
  
    /* Pass 1: process columns from input, store into work array. */
  
    inptr = coef_block;
    quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
    wsptr = workspace;
    for (ctr = 0; ctr < 8; ctr++, inptr++, quantptr++, wsptr++) {
      /* Even part */
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
      z1 = LEFT_SHIFT(z1, CONST_BITS);
      /* Add fudge factor here for final descale. */
      z1 += ONE << (CONST_BITS-PASS1_BITS-1);
  
      z2 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
      z3 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
      z4 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
  
      tmp10 = z3 + z4;
      tmp11 = z3 - z4;
  
      tmp12 = MULTIPLY(tmp10, FIX(1.155388986));                /* (c4+c6)/2 */
      tmp13 = MULTIPLY(tmp11, FIX(0.096834934)) + z1;           /* (c4-c6)/2 */
  
      tmp20 = MULTIPLY(z2, FIX(1.373119086)) + tmp12 + tmp13;   /* c2 */
      tmp22 = MULTIPLY(z2, FIX(0.501487041)) - tmp12 + tmp13;   /* c10 */
  
      tmp12 = MULTIPLY(tmp10, FIX(0.316450131));                /* (c8-c12)/2 */
      tmp13 = MULTIPLY(tmp11, FIX(0.486914739)) + z1;           /* (c8+c12)/2 */
  
      tmp21 = MULTIPLY(z2, FIX(1.058554052)) - tmp12 + tmp13;   /* c6 */
      tmp25 = MULTIPLY(z2, - FIX(1.252223920)) + tmp12 + tmp13; /* c4 */
  
      tmp12 = MULTIPLY(tmp10, FIX(0.435816023));                /* (c2-c10)/2 */
      tmp13 = MULTIPLY(tmp11, FIX(0.937303064)) - z1;           /* (c2+c10)/2 */
  
      tmp23 = MULTIPLY(z2, - FIX(0.170464608)) - tmp12 - tmp13; /* c12 */
      tmp24 = MULTIPLY(z2, - FIX(0.803364869)) + tmp12 - tmp13; /* c8 */
  
      tmp26 = MULTIPLY(tmp11 - z2, FIX(1.414213562)) + z1;      /* c0 */
  
      /* Odd part */
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
      z2 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
      z3 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
      z4 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
  
      tmp11 = MULTIPLY(z1 + z2, FIX(1.322312651));     /* c3 */
      tmp12 = MULTIPLY(z1 + z3, FIX(1.163874945));     /* c5 */
      tmp15 = z1 + z4;
      tmp13 = MULTIPLY(tmp15, FIX(0.937797057));       /* c7 */
      tmp10 = tmp11 + tmp12 + tmp13 -
              MULTIPLY(z1, FIX(2.020082300));          /* c7+c5+c3-c1 */
      tmp14 = MULTIPLY(z2 + z3, - FIX(0.338443458));   /* -c11 */
      tmp11 += tmp14 + MULTIPLY(z2, FIX(0.837223564)); /* c5+c9+c11-c3 */
      tmp12 += tmp14 - MULTIPLY(z3, FIX(1.572116027)); /* c1+c5-c9-c11 */
      tmp14 = MULTIPLY(z2 + z4, - FIX(1.163874945));   /* -c5 */
      tmp11 += tmp14;
      tmp13 += tmp14 + MULTIPLY(z4, FIX(2.205608352)); /* c3+c5+c9-c7 */
      tmp14 = MULTIPLY(z3 + z4, - FIX(0.657217813));   /* -c9 */
      tmp12 += tmp14;
      tmp13 += tmp14;
      tmp15 = MULTIPLY(tmp15, FIX(0.338443458));       /* c11 */
      tmp14 = tmp15 + MULTIPLY(z1, FIX(0.318774355)) - /* c9-c11 */
              MULTIPLY(z2, FIX(0.466105296));          /* c1-c7 */
      z1    = MULTIPLY(z3 - z2, FIX(0.937797057));     /* c7 */
      tmp14 += z1;
      tmp15 += z1 + MULTIPLY(z3, FIX(0.384515595)) -   /* c3-c7 */
               MULTIPLY(z4, FIX(1.742345811));         /* c1+c11 */
  
      /* Final output stage */
  
      wsptr[8*0]  = (int) RIGHT_SHIFT(tmp20 + tmp10, CONST_BITS-PASS1_BITS);
      wsptr[8*12] = (int) RIGHT_SHIFT(tmp20 - tmp10, CONST_BITS-PASS1_BITS);
      wsptr[8*1]  = (int) RIGHT_SHIFT(tmp21 + tmp11, CONST_BITS-PASS1_BITS);
      wsptr[8*11] = (int) RIGHT_SHIFT(tmp21 - tmp11, CONST_BITS-PASS1_BITS);
      wsptr[8*2]  = (int) RIGHT_SHIFT(tmp22 + tmp12, CONST_BITS-PASS1_BITS);
      wsptr[8*10] = (int) RIGHT_SHIFT(tmp22 - tmp12, CONST_BITS-PASS1_BITS);
      wsptr[8*3]  = (int) RIGHT_SHIFT(tmp23 + tmp13, CONST_BITS-PASS1_BITS);
      wsptr[8*9]  = (int) RIGHT_SHIFT(tmp23 - tmp13, CONST_BITS-PASS1_BITS);
      wsptr[8*4]  = (int) RIGHT_SHIFT(tmp24 + tmp14, CONST_BITS-PASS1_BITS);
      wsptr[8*8]  = (int) RIGHT_SHIFT(tmp24 - tmp14, CONST_BITS-PASS1_BITS);
      wsptr[8*5]  = (int) RIGHT_SHIFT(tmp25 + tmp15, CONST_BITS-PASS1_BITS);
      wsptr[8*7]  = (int) RIGHT_SHIFT(tmp25 - tmp15, CONST_BITS-PASS1_BITS);
      wsptr[8*6]  = (int) RIGHT_SHIFT(tmp26, CONST_BITS-PASS1_BITS);
    }
  
    /* Pass 2: process 13 rows from work array, store into output array. */
  
    wsptr = workspace;
    for (ctr = 0; ctr < 13; ctr++) {
      outptr = output_buf[ctr] + output_col;
  
      /* Even part */
  
      /* Add fudge factor here for final descale. */
      z1 = (JLONG) wsptr[0] + (ONE << (PASS1_BITS+2));
      z1 = LEFT_SHIFT(z1, CONST_BITS);
  
      z2 = (JLONG) wsptr[2];
      z3 = (JLONG) wsptr[4];
      z4 = (JLONG) wsptr[6];
  
      tmp10 = z3 + z4;
      tmp11 = z3 - z4;
  
      tmp12 = MULTIPLY(tmp10, FIX(1.155388986));                /* (c4+c6)/2 */
      tmp13 = MULTIPLY(tmp11, FIX(0.096834934)) + z1;           /* (c4-c6)/2 */
  
      tmp20 = MULTIPLY(z2, FIX(1.373119086)) + tmp12 + tmp13;   /* c2 */
      tmp22 = MULTIPLY(z2, FIX(0.501487041)) - tmp12 + tmp13;   /* c10 */
  
      tmp12 = MULTIPLY(tmp10, FIX(0.316450131));                /* (c8-c12)/2 */
      tmp13 = MULTIPLY(tmp11, FIX(0.486914739)) + z1;           /* (c8+c12)/2 */
  
      tmp21 = MULTIPLY(z2, FIX(1.058554052)) - tmp12 + tmp13;   /* c6 */
      tmp25 = MULTIPLY(z2, - FIX(1.252223920)) + tmp12 + tmp13; /* c4 */
  
      tmp12 = MULTIPLY(tmp10, FIX(0.435816023));                /* (c2-c10)/2 */
      tmp13 = MULTIPLY(tmp11, FIX(0.937303064)) - z1;           /* (c2+c10)/2 */
  
      tmp23 = MULTIPLY(z2, - FIX(0.170464608)) - tmp12 - tmp13; /* c12 */
      tmp24 = MULTIPLY(z2, - FIX(0.803364869)) + tmp12 - tmp13; /* c8 */
  
      tmp26 = MULTIPLY(tmp11 - z2, FIX(1.414213562)) + z1;      /* c0 */
  
      /* Odd part */
  
      z1 = (JLONG) wsptr[1];
      z2 = (JLONG) wsptr[3];
      z3 = (JLONG) wsptr[5];
      z4 = (JLONG) wsptr[7];
  
      tmp11 = MULTIPLY(z1 + z2, FIX(1.322312651));     /* c3 */
      tmp12 = MULTIPLY(z1 + z3, FIX(1.163874945));     /* c5 */
      tmp15 = z1 + z4;
      tmp13 = MULTIPLY(tmp15, FIX(0.937797057));       /* c7 */
      tmp10 = tmp11 + tmp12 + tmp13 -
              MULTIPLY(z1, FIX(2.020082300));          /* c7+c5+c3-c1 */
      tmp14 = MULTIPLY(z2 + z3, - FIX(0.338443458));   /* -c11 */
      tmp11 += tmp14 + MULTIPLY(z2, FIX(0.837223564)); /* c5+c9+c11-c3 */
      tmp12 += tmp14 - MULTIPLY(z3, FIX(1.572116027)); /* c1+c5-c9-c11 */
      tmp14 = MULTIPLY(z2 + z4, - FIX(1.163874945));   /* -c5 */
      tmp11 += tmp14;
      tmp13 += tmp14 + MULTIPLY(z4, FIX(2.205608352)); /* c3+c5+c9-c7 */
      tmp14 = MULTIPLY(z3 + z4, - FIX(0.657217813));   /* -c9 */
      tmp12 += tmp14;
      tmp13 += tmp14;
      tmp15 = MULTIPLY(tmp15, FIX(0.338443458));       /* c11 */
      tmp14 = tmp15 + MULTIPLY(z1, FIX(0.318774355)) - /* c9-c11 */
              MULTIPLY(z2, FIX(0.466105296));          /* c1-c7 */
      z1    = MULTIPLY(z3 - z2, FIX(0.937797057));     /* c7 */
      tmp14 += z1;
      tmp15 += z1 + MULTIPLY(z3, FIX(0.384515595)) -   /* c3-c7 */
               MULTIPLY(z4, FIX(1.742345811));         /* c1+c11 */
  
      /* Final output stage */
  
      outptr[0]  = range_limit[(int) RIGHT_SHIFT(tmp20 + tmp10,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[12] = range_limit[(int) RIGHT_SHIFT(tmp20 - tmp10,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[1]  = range_limit[(int) RIGHT_SHIFT(tmp21 + tmp11,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[11] = range_limit[(int) RIGHT_SHIFT(tmp21 - tmp11,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[2]  = range_limit[(int) RIGHT_SHIFT(tmp22 + tmp12,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[10] = range_limit[(int) RIGHT_SHIFT(tmp22 - tmp12,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[3]  = range_limit[(int) RIGHT_SHIFT(tmp23 + tmp13,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[9]  = range_limit[(int) RIGHT_SHIFT(tmp23 - tmp13,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[4]  = range_limit[(int) RIGHT_SHIFT(tmp24 + tmp14,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[8]  = range_limit[(int) RIGHT_SHIFT(tmp24 - tmp14,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[5]  = range_limit[(int) RIGHT_SHIFT(tmp25 + tmp15,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[7]  = range_limit[(int) RIGHT_SHIFT(tmp25 - tmp15,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[6]  = range_limit[(int) RIGHT_SHIFT(tmp26,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
  
      wsptr += 8;         /* advance pointer to next row */
    }
  }
  
  
  /*
   * Perform dequantization and inverse DCT on one block of coefficients,
   * producing a 14x14 output block.
   *
   * Optimized algorithm with 20 multiplications in the 1-D kernel.
   * cK represents sqrt(2) * cos(K*pi/28).
   */
  
  GLOBAL(void)
  jpeg_idct_14x14 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
                   JCOEFPTR coef_block,
                   JSAMPARRAY output_buf, JDIMENSION output_col)
  {
    JLONG tmp10, tmp11, tmp12, tmp13, tmp14, tmp15, tmp16;
    JLONG tmp20, tmp21, tmp22, tmp23, tmp24, tmp25, tmp26;
    JLONG z1, z2, z3, z4;
    JCOEFPTR inptr;
    ISLOW_MULT_TYPE * quantptr;
    int * wsptr;
    JSAMPROW outptr;
    JSAMPLE *range_limit = IDCT_range_limit(cinfo);
    int ctr;
    int workspace[8*14];  /* buffers data between passes */
    SHIFT_TEMPS
  
    /* Pass 1: process columns from input, store into work array. */
  
    inptr = coef_block;
    quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
    wsptr = workspace;
    for (ctr = 0; ctr < 8; ctr++, inptr++, quantptr++, wsptr++) {
      /* Even part */
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
      z1 = LEFT_SHIFT(z1, CONST_BITS);
      /* Add fudge factor here for final descale. */
      z1 += ONE << (CONST_BITS-PASS1_BITS-1);
      z4 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
      z2 = MULTIPLY(z4, FIX(1.274162392));         /* c4 */
      z3 = MULTIPLY(z4, FIX(0.314692123));         /* c12 */
      z4 = MULTIPLY(z4, FIX(0.881747734));         /* c8 */
  
      tmp10 = z1 + z2;
      tmp11 = z1 + z3;
      tmp12 = z1 - z4;
  
      tmp23 = RIGHT_SHIFT(z1 - LEFT_SHIFT(z2 + z3 - z4, 1),
                          CONST_BITS-PASS1_BITS);  /* c0 = (c4+c12-c8)*2 */
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
      z2 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
  
      z3 = MULTIPLY(z1 + z2, FIX(1.105676686));    /* c6 */
  
      tmp13 = z3 + MULTIPLY(z1, FIX(0.273079590)); /* c2-c6 */
      tmp14 = z3 - MULTIPLY(z2, FIX(1.719280954)); /* c6+c10 */
      tmp15 = MULTIPLY(z1, FIX(0.613604268)) -     /* c10 */
              MULTIPLY(z2, FIX(1.378756276));      /* c2 */
  
      tmp20 = tmp10 + tmp13;
      tmp26 = tmp10 - tmp13;
      tmp21 = tmp11 + tmp14;
      tmp25 = tmp11 - tmp14;
      tmp22 = tmp12 + tmp15;
      tmp24 = tmp12 - tmp15;
  
      /* Odd part */
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
      z2 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
      z3 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
      z4 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
      tmp13 = LEFT_SHIFT(z4, CONST_BITS);
  
      tmp14 = z1 + z3;
      tmp11 = MULTIPLY(z1 + z2, FIX(1.334852607));           /* c3 */
      tmp12 = MULTIPLY(tmp14, FIX(1.197448846));             /* c5 */
      tmp10 = tmp11 + tmp12 + tmp13 - MULTIPLY(z1, FIX(1.126980169)); /* c3+c5-c1 */
      tmp14 = MULTIPLY(tmp14, FIX(0.752406978));             /* c9 */
      tmp16 = tmp14 - MULTIPLY(z1, FIX(1.061150426));        /* c9+c11-c13 */
      z1    -= z2;
      tmp15 = MULTIPLY(z1, FIX(0.467085129)) - tmp13;        /* c11 */
      tmp16 += tmp15;
      z1    += z4;
      z4    = MULTIPLY(z2 + z3, - FIX(0.158341681)) - tmp13; /* -c13 */
      tmp11 += z4 - MULTIPLY(z2, FIX(0.424103948));          /* c3-c9-c13 */
      tmp12 += z4 - MULTIPLY(z3, FIX(2.373959773));          /* c3+c5-c13 */
      z4    = MULTIPLY(z3 - z2, FIX(1.405321284));           /* c1 */
      tmp14 += z4 + tmp13 - MULTIPLY(z3, FIX(1.6906431334)); /* c1+c9-c11 */
      tmp15 += z4 + MULTIPLY(z2, FIX(0.674957567));          /* c1+c11-c5 */
  
      tmp13 = LEFT_SHIFT(z1 - z3, PASS1_BITS);
  
      /* Final output stage */
  
      wsptr[8*0]  = (int) RIGHT_SHIFT(tmp20 + tmp10, CONST_BITS-PASS1_BITS);
      wsptr[8*13] = (int) RIGHT_SHIFT(tmp20 - tmp10, CONST_BITS-PASS1_BITS);
      wsptr[8*1]  = (int) RIGHT_SHIFT(tmp21 + tmp11, CONST_BITS-PASS1_BITS);
      wsptr[8*12] = (int) RIGHT_SHIFT(tmp21 - tmp11, CONST_BITS-PASS1_BITS);
      wsptr[8*2]  = (int) RIGHT_SHIFT(tmp22 + tmp12, CONST_BITS-PASS1_BITS);
      wsptr[8*11] = (int) RIGHT_SHIFT(tmp22 - tmp12, CONST_BITS-PASS1_BITS);
      wsptr[8*3]  = (int) (tmp23 + tmp13);
      wsptr[8*10] = (int) (tmp23 - tmp13);
      wsptr[8*4]  = (int) RIGHT_SHIFT(tmp24 + tmp14, CONST_BITS-PASS1_BITS);
      wsptr[8*9]  = (int) RIGHT_SHIFT(tmp24 - tmp14, CONST_BITS-PASS1_BITS);
      wsptr[8*5]  = (int) RIGHT_SHIFT(tmp25 + tmp15, CONST_BITS-PASS1_BITS);
      wsptr[8*8]  = (int) RIGHT_SHIFT(tmp25 - tmp15, CONST_BITS-PASS1_BITS);
      wsptr[8*6]  = (int) RIGHT_SHIFT(tmp26 + tmp16, CONST_BITS-PASS1_BITS);
      wsptr[8*7]  = (int) RIGHT_SHIFT(tmp26 - tmp16, CONST_BITS-PASS1_BITS);
    }
  
    /* Pass 2: process 14 rows from work array, store into output array. */
  
    wsptr = workspace;
    for (ctr = 0; ctr < 14; ctr++) {
      outptr = output_buf[ctr] + output_col;
  
      /* Even part */
  
      /* Add fudge factor here for final descale. */
      z1 = (JLONG) wsptr[0] + (ONE << (PASS1_BITS+2));
      z1 = LEFT_SHIFT(z1, CONST_BITS);
      z4 = (JLONG) wsptr[4];
      z2 = MULTIPLY(z4, FIX(1.274162392));         /* c4 */
      z3 = MULTIPLY(z4, FIX(0.314692123));         /* c12 */
      z4 = MULTIPLY(z4, FIX(0.881747734));         /* c8 */
  
      tmp10 = z1 + z2;
      tmp11 = z1 + z3;
      tmp12 = z1 - z4;
  
      tmp23 = z1 - LEFT_SHIFT(z2 + z3 - z4, 1);    /* c0 = (c4+c12-c8)*2 */
  
      z1 = (JLONG) wsptr[2];
      z2 = (JLONG) wsptr[6];
  
      z3 = MULTIPLY(z1 + z2, FIX(1.105676686));    /* c6 */
  
      tmp13 = z3 + MULTIPLY(z1, FIX(0.273079590)); /* c2-c6 */
      tmp14 = z3 - MULTIPLY(z2, FIX(1.719280954)); /* c6+c10 */
      tmp15 = MULTIPLY(z1, FIX(0.613604268)) -     /* c10 */
              MULTIPLY(z2, FIX(1.378756276));      /* c2 */
  
      tmp20 = tmp10 + tmp13;
      tmp26 = tmp10 - tmp13;
      tmp21 = tmp11 + tmp14;
      tmp25 = tmp11 - tmp14;
      tmp22 = tmp12 + tmp15;
      tmp24 = tmp12 - tmp15;
  
      /* Odd part */
  
      z1 = (JLONG) wsptr[1];
      z2 = (JLONG) wsptr[3];
      z3 = (JLONG) wsptr[5];
      z4 = (JLONG) wsptr[7];
      z4 = LEFT_SHIFT(z4, CONST_BITS);
  
      tmp14 = z1 + z3;
      tmp11 = MULTIPLY(z1 + z2, FIX(1.334852607));           /* c3 */
      tmp12 = MULTIPLY(tmp14, FIX(1.197448846));             /* c5 */
      tmp10 = tmp11 + tmp12 + z4 - MULTIPLY(z1, FIX(1.126980169)); /* c3+c5-c1 */
      tmp14 = MULTIPLY(tmp14, FIX(0.752406978));             /* c9 */
      tmp16 = tmp14 - MULTIPLY(z1, FIX(1.061150426));        /* c9+c11-c13 */
      z1    -= z2;
      tmp15 = MULTIPLY(z1, FIX(0.467085129)) - z4;           /* c11 */
      tmp16 += tmp15;
      tmp13 = MULTIPLY(z2 + z3, - FIX(0.158341681)) - z4;    /* -c13 */
      tmp11 += tmp13 - MULTIPLY(z2, FIX(0.424103948));       /* c3-c9-c13 */
      tmp12 += tmp13 - MULTIPLY(z3, FIX(2.373959773));       /* c3+c5-c13 */
      tmp13 = MULTIPLY(z3 - z2, FIX(1.405321284));           /* c1 */
      tmp14 += tmp13 + z4 - MULTIPLY(z3, FIX(1.6906431334)); /* c1+c9-c11 */
      tmp15 += tmp13 + MULTIPLY(z2, FIX(0.674957567));       /* c1+c11-c5 */
  
      tmp13 = LEFT_SHIFT(z1 - z3, CONST_BITS) + z4;
  
      /* Final output stage */
  
      outptr[0]  = range_limit[(int) RIGHT_SHIFT(tmp20 + tmp10,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[13] = range_limit[(int) RIGHT_SHIFT(tmp20 - tmp10,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[1]  = range_limit[(int) RIGHT_SHIFT(tmp21 + tmp11,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[12] = range_limit[(int) RIGHT_SHIFT(tmp21 - tmp11,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[2]  = range_limit[(int) RIGHT_SHIFT(tmp22 + tmp12,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[11] = range_limit[(int) RIGHT_SHIFT(tmp22 - tmp12,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[3]  = range_limit[(int) RIGHT_SHIFT(tmp23 + tmp13,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[10] = range_limit[(int) RIGHT_SHIFT(tmp23 - tmp13,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[4]  = range_limit[(int) RIGHT_SHIFT(tmp24 + tmp14,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[9]  = range_limit[(int) RIGHT_SHIFT(tmp24 - tmp14,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[5]  = range_limit[(int) RIGHT_SHIFT(tmp25 + tmp15,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[8]  = range_limit[(int) RIGHT_SHIFT(tmp25 - tmp15,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[6]  = range_limit[(int) RIGHT_SHIFT(tmp26 + tmp16,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[7]  = range_limit[(int) RIGHT_SHIFT(tmp26 - tmp16,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
  
      wsptr += 8;         /* advance pointer to next row */
    }
  }
  
  
  /*
   * Perform dequantization and inverse DCT on one block of coefficients,
   * producing a 15x15 output block.
   *
   * Optimized algorithm with 22 multiplications in the 1-D kernel.
   * cK represents sqrt(2) * cos(K*pi/30).
   */
  
  GLOBAL(void)
  jpeg_idct_15x15 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
                   JCOEFPTR coef_block,
                   JSAMPARRAY output_buf, JDIMENSION output_col)
  {
    JLONG tmp10, tmp11, tmp12, tmp13, tmp14, tmp15, tmp16;
    JLONG tmp20, tmp21, tmp22, tmp23, tmp24, tmp25, tmp26, tmp27;
    JLONG z1, z2, z3, z4;
    JCOEFPTR inptr;
    ISLOW_MULT_TYPE * quantptr;
    int * wsptr;
    JSAMPROW outptr;
    JSAMPLE *range_limit = IDCT_range_limit(cinfo);
    int ctr;
    int workspace[8*15];  /* buffers data between passes */
    SHIFT_TEMPS
  
    /* Pass 1: process columns from input, store into work array. */
  
    inptr = coef_block;
    quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
    wsptr = workspace;
    for (ctr = 0; ctr < 8; ctr++, inptr++, quantptr++, wsptr++) {
      /* Even part */
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
      z1 = LEFT_SHIFT(z1, CONST_BITS);
      /* Add fudge factor here for final descale. */
      z1 += ONE << (CONST_BITS-PASS1_BITS-1);
  
      z2 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
      z3 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
      z4 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
  
      tmp10 = MULTIPLY(z4, FIX(0.437016024)); /* c12 */
      tmp11 = MULTIPLY(z4, FIX(1.144122806)); /* c6 */
  
      tmp12 = z1 - tmp10;
      tmp13 = z1 + tmp11;
      z1 -= LEFT_SHIFT(tmp11 - tmp10, 1);     /* c0 = (c6-c12)*2 */
  
      z4 = z2 - z3;
      z3 += z2;
      tmp10 = MULTIPLY(z3, FIX(1.337628990)); /* (c2+c4)/2 */
      tmp11 = MULTIPLY(z4, FIX(0.045680613)); /* (c2-c4)/2 */
      z2 = MULTIPLY(z2, FIX(1.439773946));    /* c4+c14 */
  
      tmp20 = tmp13 + tmp10 + tmp11;
      tmp23 = tmp12 - tmp10 + tmp11 + z2;
  
      tmp10 = MULTIPLY(z3, FIX(0.547059574)); /* (c8+c14)/2 */
      tmp11 = MULTIPLY(z4, FIX(0.399234004)); /* (c8-c14)/2 */
  
      tmp25 = tmp13 - tmp10 - tmp11;
      tmp26 = tmp12 + tmp10 - tmp11 - z2;
  
      tmp10 = MULTIPLY(z3, FIX(0.790569415)); /* (c6+c12)/2 */
      tmp11 = MULTIPLY(z4, FIX(0.353553391)); /* (c6-c12)/2 */
  
      tmp21 = tmp12 + tmp10 + tmp11;
      tmp24 = tmp13 - tmp10 + tmp11;
      tmp11 += tmp11;
      tmp22 = z1 + tmp11;                     /* c10 = c6-c12 */
      tmp27 = z1 - tmp11 - tmp11;             /* c0 = (c6-c12)*2 */
  
      /* Odd part */
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
      z2 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
      z4 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
      z3 = MULTIPLY(z4, FIX(1.224744871));                    /* c5 */
      z4 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
  
      tmp13 = z2 - z4;
      tmp15 = MULTIPLY(z1 + tmp13, FIX(0.831253876));         /* c9 */
      tmp11 = tmp15 + MULTIPLY(z1, FIX(0.513743148));         /* c3-c9 */
      tmp14 = tmp15 - MULTIPLY(tmp13, FIX(2.176250899));      /* c3+c9 */
  
      tmp13 = MULTIPLY(z2, - FIX(0.831253876));               /* -c9 */
      tmp15 = MULTIPLY(z2, - FIX(1.344997024));               /* -c3 */
      z2 = z1 - z4;
      tmp12 = z3 + MULTIPLY(z2, FIX(1.406466353));            /* c1 */
  
      tmp10 = tmp12 + MULTIPLY(z4, FIX(2.457431844)) - tmp15; /* c1+c7 */
      tmp16 = tmp12 - MULTIPLY(z1, FIX(1.112434820)) + tmp13; /* c1-c13 */
      tmp12 = MULTIPLY(z2, FIX(1.224744871)) - z3;            /* c5 */
      z2 = MULTIPLY(z1 + z4, FIX(0.575212477));               /* c11 */
      tmp13 += z2 + MULTIPLY(z1, FIX(0.475753014)) - z3;      /* c7-c11 */
      tmp15 += z2 - MULTIPLY(z4, FIX(0.869244010)) + z3;      /* c11+c13 */
  
      /* Final output stage */
  
      wsptr[8*0]  = (int) RIGHT_SHIFT(tmp20 + tmp10, CONST_BITS-PASS1_BITS);
      wsptr[8*14] = (int) RIGHT_SHIFT(tmp20 - tmp10, CONST_BITS-PASS1_BITS);
      wsptr[8*1]  = (int) RIGHT_SHIFT(tmp21 + tmp11, CONST_BITS-PASS1_BITS);
      wsptr[8*13] = (int) RIGHT_SHIFT(tmp21 - tmp11, CONST_BITS-PASS1_BITS);
      wsptr[8*2]  = (int) RIGHT_SHIFT(tmp22 + tmp12, CONST_BITS-PASS1_BITS);
      wsptr[8*12] = (int) RIGHT_SHIFT(tmp22 - tmp12, CONST_BITS-PASS1_BITS);
      wsptr[8*3]  = (int) RIGHT_SHIFT(tmp23 + tmp13, CONST_BITS-PASS1_BITS);
      wsptr[8*11] = (int) RIGHT_SHIFT(tmp23 - tmp13, CONST_BITS-PASS1_BITS);
      wsptr[8*4]  = (int) RIGHT_SHIFT(tmp24 + tmp14, CONST_BITS-PASS1_BITS);
      wsptr[8*10] = (int) RIGHT_SHIFT(tmp24 - tmp14, CONST_BITS-PASS1_BITS);
      wsptr[8*5]  = (int) RIGHT_SHIFT(tmp25 + tmp15, CONST_BITS-PASS1_BITS);
      wsptr[8*9]  = (int) RIGHT_SHIFT(tmp25 - tmp15, CONST_BITS-PASS1_BITS);
      wsptr[8*6]  = (int) RIGHT_SHIFT(tmp26 + tmp16, CONST_BITS-PASS1_BITS);
      wsptr[8*8]  = (int) RIGHT_SHIFT(tmp26 - tmp16, CONST_BITS-PASS1_BITS);
      wsptr[8*7]  = (int) RIGHT_SHIFT(tmp27, CONST_BITS-PASS1_BITS);
    }
  
    /* Pass 2: process 15 rows from work array, store into output array. */
  
    wsptr = workspace;
    for (ctr = 0; ctr < 15; ctr++) {
      outptr = output_buf[ctr] + output_col;
  
      /* Even part */
  
      /* Add fudge factor here for final descale. */
      z1 = (JLONG) wsptr[0] + (ONE << (PASS1_BITS+2));
      z1 = LEFT_SHIFT(z1, CONST_BITS);
  
      z2 = (JLONG) wsptr[2];
      z3 = (JLONG) wsptr[4];
      z4 = (JLONG) wsptr[6];
  
      tmp10 = MULTIPLY(z4, FIX(0.437016024)); /* c12 */
      tmp11 = MULTIPLY(z4, FIX(1.144122806)); /* c6 */
  
      tmp12 = z1 - tmp10;
      tmp13 = z1 + tmp11;
      z1 -= LEFT_SHIFT(tmp11 - tmp10, 1);     /* c0 = (c6-c12)*2 */
  
      z4 = z2 - z3;
      z3 += z2;
      tmp10 = MULTIPLY(z3, FIX(1.337628990)); /* (c2+c4)/2 */
      tmp11 = MULTIPLY(z4, FIX(0.045680613)); /* (c2-c4)/2 */
      z2 = MULTIPLY(z2, FIX(1.439773946));    /* c4+c14 */
  
      tmp20 = tmp13 + tmp10 + tmp11;
      tmp23 = tmp12 - tmp10 + tmp11 + z2;
  
      tmp10 = MULTIPLY(z3, FIX(0.547059574)); /* (c8+c14)/2 */
      tmp11 = MULTIPLY(z4, FIX(0.399234004)); /* (c8-c14)/2 */
  
      tmp25 = tmp13 - tmp10 - tmp11;
      tmp26 = tmp12 + tmp10 - tmp11 - z2;
  
      tmp10 = MULTIPLY(z3, FIX(0.790569415)); /* (c6+c12)/2 */
      tmp11 = MULTIPLY(z4, FIX(0.353553391)); /* (c6-c12)/2 */
  
      tmp21 = tmp12 + tmp10 + tmp11;
      tmp24 = tmp13 - tmp10 + tmp11;
      tmp11 += tmp11;
      tmp22 = z1 + tmp11;                     /* c10 = c6-c12 */
      tmp27 = z1 - tmp11 - tmp11;             /* c0 = (c6-c12)*2 */
  
      /* Odd part */
  
      z1 = (JLONG) wsptr[1];
      z2 = (JLONG) wsptr[3];
      z4 = (JLONG) wsptr[5];
      z3 = MULTIPLY(z4, FIX(1.224744871));                    /* c5 */
      z4 = (JLONG) wsptr[7];
  
      tmp13 = z2 - z4;
      tmp15 = MULTIPLY(z1 + tmp13, FIX(0.831253876));         /* c9 */
      tmp11 = tmp15 + MULTIPLY(z1, FIX(0.513743148));         /* c3-c9 */
      tmp14 = tmp15 - MULTIPLY(tmp13, FIX(2.176250899));      /* c3+c9 */
  
      tmp13 = MULTIPLY(z2, - FIX(0.831253876));               /* -c9 */
      tmp15 = MULTIPLY(z2, - FIX(1.344997024));               /* -c3 */
      z2 = z1 - z4;
      tmp12 = z3 + MULTIPLY(z2, FIX(1.406466353));            /* c1 */
  
      tmp10 = tmp12 + MULTIPLY(z4, FIX(2.457431844)) - tmp15; /* c1+c7 */
      tmp16 = tmp12 - MULTIPLY(z1, FIX(1.112434820)) + tmp13; /* c1-c13 */
      tmp12 = MULTIPLY(z2, FIX(1.224744871)) - z3;            /* c5 */
      z2 = MULTIPLY(z1 + z4, FIX(0.575212477));               /* c11 */
      tmp13 += z2 + MULTIPLY(z1, FIX(0.475753014)) - z3;      /* c7-c11 */
      tmp15 += z2 - MULTIPLY(z4, FIX(0.869244010)) + z3;      /* c11+c13 */
  
      /* Final output stage */
  
      outptr[0]  = range_limit[(int) RIGHT_SHIFT(tmp20 + tmp10,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[14] = range_limit[(int) RIGHT_SHIFT(tmp20 - tmp10,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[1]  = range_limit[(int) RIGHT_SHIFT(tmp21 + tmp11,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[13] = range_limit[(int) RIGHT_SHIFT(tmp21 - tmp11,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[2]  = range_limit[(int) RIGHT_SHIFT(tmp22 + tmp12,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[12] = range_limit[(int) RIGHT_SHIFT(tmp22 - tmp12,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[3]  = range_limit[(int) RIGHT_SHIFT(tmp23 + tmp13,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[11] = range_limit[(int) RIGHT_SHIFT(tmp23 - tmp13,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[4]  = range_limit[(int) RIGHT_SHIFT(tmp24 + tmp14,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[10] = range_limit[(int) RIGHT_SHIFT(tmp24 - tmp14,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[5]  = range_limit[(int) RIGHT_SHIFT(tmp25 + tmp15,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[9]  = range_limit[(int) RIGHT_SHIFT(tmp25 - tmp15,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[6]  = range_limit[(int) RIGHT_SHIFT(tmp26 + tmp16,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[8]  = range_limit[(int) RIGHT_SHIFT(tmp26 - tmp16,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[7]  = range_limit[(int) RIGHT_SHIFT(tmp27,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
  
      wsptr += 8;         /* advance pointer to next row */
    }
  }
  
  
  /*
   * Perform dequantization and inverse DCT on one block of coefficients,
   * producing a 16x16 output block.
   *
   * Optimized algorithm with 28 multiplications in the 1-D kernel.
   * cK represents sqrt(2) * cos(K*pi/32).
   */
  
  GLOBAL(void)
  jpeg_idct_16x16 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
                   JCOEFPTR coef_block,
                   JSAMPARRAY output_buf, JDIMENSION output_col)
  {
    JLONG tmp0, tmp1, tmp2, tmp3, tmp10, tmp11, tmp12, tmp13;
    JLONG tmp20, tmp21, tmp22, tmp23, tmp24, tmp25, tmp26, tmp27;
    JLONG z1, z2, z3, z4;
    JCOEFPTR inptr;
    ISLOW_MULT_TYPE * quantptr;
    int * wsptr;
    JSAMPROW outptr;
    JSAMPLE *range_limit = IDCT_range_limit(cinfo);
    int ctr;
    int workspace[8*16];  /* buffers data between passes */
    SHIFT_TEMPS
  
    /* Pass 1: process columns from input, store into work array. */
  
    inptr = coef_block;
    quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
    wsptr = workspace;
    for (ctr = 0; ctr < 8; ctr++, inptr++, quantptr++, wsptr++) {
      /* Even part */
  
      tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
      tmp0 = LEFT_SHIFT(tmp0, CONST_BITS);
      /* Add fudge factor here for final descale. */
      tmp0 += 1 << (CONST_BITS-PASS1_BITS-1);
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
      tmp1 = MULTIPLY(z1, FIX(1.306562965));      /* c4[16] = c2[8] */
      tmp2 = MULTIPLY(z1, FIX_0_541196100);       /* c12[16] = c6[8] */
  
      tmp10 = tmp0 + tmp1;
      tmp11 = tmp0 - tmp1;
      tmp12 = tmp0 + tmp2;
      tmp13 = tmp0 - tmp2;
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
      z2 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
      z3 = z1 - z2;
      z4 = MULTIPLY(z3, FIX(0.275899379));        /* c14[16] = c7[8] */
      z3 = MULTIPLY(z3, FIX(1.387039845));        /* c2[16] = c1[8] */
  
      tmp0 = z3 + MULTIPLY(z2, FIX_2_562915447);  /* (c6+c2)[16] = (c3+c1)[8] */
      tmp1 = z4 + MULTIPLY(z1, FIX_0_899976223);  /* (c6-c14)[16] = (c3-c7)[8] */
      tmp2 = z3 - MULTIPLY(z1, FIX(0.601344887)); /* (c2-c10)[16] = (c1-c5)[8] */
      tmp3 = z4 - MULTIPLY(z2, FIX(0.509795579)); /* (c10-c14)[16] = (c5-c7)[8] */
  
      tmp20 = tmp10 + tmp0;
      tmp27 = tmp10 - tmp0;
      tmp21 = tmp12 + tmp1;
      tmp26 = tmp12 - tmp1;
      tmp22 = tmp13 + tmp2;
      tmp25 = tmp13 - tmp2;
      tmp23 = tmp11 + tmp3;
      tmp24 = tmp11 - tmp3;
  
      /* Odd part */
  
      z1 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
      z2 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
      z3 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
      z4 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
  
      tmp11 = z1 + z3;
  
      tmp1  = MULTIPLY(z1 + z2, FIX(1.353318001));   /* c3 */
      tmp2  = MULTIPLY(tmp11,   FIX(1.247225013));   /* c5 */
      tmp3  = MULTIPLY(z1 + z4, FIX(1.093201867));   /* c7 */
      tmp10 = MULTIPLY(z1 - z4, FIX(0.897167586));   /* c9 */
      tmp11 = MULTIPLY(tmp11,   FIX(0.666655658));   /* c11 */
      tmp12 = MULTIPLY(z1 - z2, FIX(0.410524528));   /* c13 */
      tmp0  = tmp1 + tmp2 + tmp3 -
              MULTIPLY(z1, FIX(2.286341144));        /* c7+c5+c3-c1 */
      tmp13 = tmp10 + tmp11 + tmp12 -
              MULTIPLY(z1, FIX(1.835730603));        /* c9+c11+c13-c15 */
      z1    = MULTIPLY(z2 + z3, FIX(0.138617169));   /* c15 */
      tmp1  += z1 + MULTIPLY(z2, FIX(0.071888074));  /* c9+c11-c3-c15 */
      tmp2  += z1 - MULTIPLY(z3, FIX(1.125726048));  /* c5+c7+c15-c3 */
      z1    = MULTIPLY(z3 - z2, FIX(1.407403738));   /* c1 */
      tmp11 += z1 - MULTIPLY(z3, FIX(0.766367282));  /* c1+c11-c9-c13 */
      tmp12 += z1 + MULTIPLY(z2, FIX(1.971951411));  /* c1+c5+c13-c7 */
      z2    += z4;
      z1    = MULTIPLY(z2, - FIX(0.666655658));      /* -c11 */
      tmp1  += z1;
      tmp3  += z1 + MULTIPLY(z4, FIX(1.065388962));  /* c3+c11+c15-c7 */
      z2    = MULTIPLY(z2, - FIX(1.247225013));      /* -c5 */
      tmp10 += z2 + MULTIPLY(z4, FIX(3.141271809));  /* c1+c5+c9-c13 */
      tmp12 += z2;
      z2    = MULTIPLY(z3 + z4, - FIX(1.353318001)); /* -c3 */
      tmp2  += z2;
      tmp3  += z2;
      z2    = MULTIPLY(z4 - z3, FIX(0.410524528));   /* c13 */
      tmp10 += z2;
      tmp11 += z2;
  
      /* Final output stage */
  
      wsptr[8*0]  = (int) RIGHT_SHIFT(tmp20 + tmp0,  CONST_BITS-PASS1_BITS);
      wsptr[8*15] = (int) RIGHT_SHIFT(tmp20 - tmp0,  CONST_BITS-PASS1_BITS);
      wsptr[8*1]  = (int) RIGHT_SHIFT(tmp21 + tmp1,  CONST_BITS-PASS1_BITS);
      wsptr[8*14] = (int) RIGHT_SHIFT(tmp21 - tmp1,  CONST_BITS-PASS1_BITS);
      wsptr[8*2]  = (int) RIGHT_SHIFT(tmp22 + tmp2,  CONST_BITS-PASS1_BITS);
      wsptr[8*13] = (int) RIGHT_SHIFT(tmp22 - tmp2,  CONST_BITS-PASS1_BITS);
      wsptr[8*3]  = (int) RIGHT_SHIFT(tmp23 + tmp3,  CONST_BITS-PASS1_BITS);
      wsptr[8*12] = (int) RIGHT_SHIFT(tmp23 - tmp3,  CONST_BITS-PASS1_BITS);
      wsptr[8*4]  = (int) RIGHT_SHIFT(tmp24 + tmp10, CONST_BITS-PASS1_BITS);
      wsptr[8*11] = (int) RIGHT_SHIFT(tmp24 - tmp10, CONST_BITS-PASS1_BITS);
      wsptr[8*5]  = (int) RIGHT_SHIFT(tmp25 + tmp11, CONST_BITS-PASS1_BITS);
      wsptr[8*10] = (int) RIGHT_SHIFT(tmp25 - tmp11, CONST_BITS-PASS1_BITS);
      wsptr[8*6]  = (int) RIGHT_SHIFT(tmp26 + tmp12, CONST_BITS-PASS1_BITS);
      wsptr[8*9]  = (int) RIGHT_SHIFT(tmp26 - tmp12, CONST_BITS-PASS1_BITS);
      wsptr[8*7]  = (int) RIGHT_SHIFT(tmp27 + tmp13, CONST_BITS-PASS1_BITS);
      wsptr[8*8]  = (int) RIGHT_SHIFT(tmp27 - tmp13, CONST_BITS-PASS1_BITS);
    }
  
    /* Pass 2: process 16 rows from work array, store into output array. */
  
    wsptr = workspace;
    for (ctr = 0; ctr < 16; ctr++) {
      outptr = output_buf[ctr] + output_col;
  
      /* Even part */
  
      /* Add fudge factor here for final descale. */
      tmp0 = (JLONG) wsptr[0] + (ONE << (PASS1_BITS+2));
      tmp0 = LEFT_SHIFT(tmp0, CONST_BITS);
  
      z1 = (JLONG) wsptr[4];
      tmp1 = MULTIPLY(z1, FIX(1.306562965));      /* c4[16] = c2[8] */
      tmp2 = MULTIPLY(z1, FIX_0_541196100);       /* c12[16] = c6[8] */
  
      tmp10 = tmp0 + tmp1;
      tmp11 = tmp0 - tmp1;
      tmp12 = tmp0 + tmp2;
      tmp13 = tmp0 - tmp2;
  
      z1 = (JLONG) wsptr[2];
      z2 = (JLONG) wsptr[6];
      z3 = z1 - z2;
      z4 = MULTIPLY(z3, FIX(0.275899379));        /* c14[16] = c7[8] */
      z3 = MULTIPLY(z3, FIX(1.387039845));        /* c2[16] = c1[8] */
  
      tmp0 = z3 + MULTIPLY(z2, FIX_2_562915447);  /* (c6+c2)[16] = (c3+c1)[8] */
      tmp1 = z4 + MULTIPLY(z1, FIX_0_899976223);  /* (c6-c14)[16] = (c3-c7)[8] */
      tmp2 = z3 - MULTIPLY(z1, FIX(0.601344887)); /* (c2-c10)[16] = (c1-c5)[8] */
      tmp3 = z4 - MULTIPLY(z2, FIX(0.509795579)); /* (c10-c14)[16] = (c5-c7)[8] */
  
      tmp20 = tmp10 + tmp0;
      tmp27 = tmp10 - tmp0;
      tmp21 = tmp12 + tmp1;
      tmp26 = tmp12 - tmp1;
      tmp22 = tmp13 + tmp2;
      tmp25 = tmp13 - tmp2;
      tmp23 = tmp11 + tmp3;
      tmp24 = tmp11 - tmp3;
  
      /* Odd part */
  
      z1 = (JLONG) wsptr[1];
      z2 = (JLONG) wsptr[3];
      z3 = (JLONG) wsptr[5];
      z4 = (JLONG) wsptr[7];
  
      tmp11 = z1 + z3;
  
      tmp1  = MULTIPLY(z1 + z2, FIX(1.353318001));   /* c3 */
      tmp2  = MULTIPLY(tmp11,   FIX(1.247225013));   /* c5 */
      tmp3  = MULTIPLY(z1 + z4, FIX(1.093201867));   /* c7 */
      tmp10 = MULTIPLY(z1 - z4, FIX(0.897167586));   /* c9 */
      tmp11 = MULTIPLY(tmp11,   FIX(0.666655658));   /* c11 */
      tmp12 = MULTIPLY(z1 - z2, FIX(0.410524528));   /* c13 */
      tmp0  = tmp1 + tmp2 + tmp3 -
              MULTIPLY(z1, FIX(2.286341144));        /* c7+c5+c3-c1 */
      tmp13 = tmp10 + tmp11 + tmp12 -
              MULTIPLY(z1, FIX(1.835730603));        /* c9+c11+c13-c15 */
      z1    = MULTIPLY(z2 + z3, FIX(0.138617169));   /* c15 */
      tmp1  += z1 + MULTIPLY(z2, FIX(0.071888074));  /* c9+c11-c3-c15 */
      tmp2  += z1 - MULTIPLY(z3, FIX(1.125726048));  /* c5+c7+c15-c3 */
      z1    = MULTIPLY(z3 - z2, FIX(1.407403738));   /* c1 */
      tmp11 += z1 - MULTIPLY(z3, FIX(0.766367282));  /* c1+c11-c9-c13 */
      tmp12 += z1 + MULTIPLY(z2, FIX(1.971951411));  /* c1+c5+c13-c7 */
      z2    += z4;
      z1    = MULTIPLY(z2, - FIX(0.666655658));      /* -c11 */
      tmp1  += z1;
      tmp3  += z1 + MULTIPLY(z4, FIX(1.065388962));  /* c3+c11+c15-c7 */
      z2    = MULTIPLY(z2, - FIX(1.247225013));      /* -c5 */
      tmp10 += z2 + MULTIPLY(z4, FIX(3.141271809));  /* c1+c5+c9-c13 */
      tmp12 += z2;
      z2    = MULTIPLY(z3 + z4, - FIX(1.353318001)); /* -c3 */
      tmp2  += z2;
      tmp3  += z2;
      z2    = MULTIPLY(z4 - z3, FIX(0.410524528));   /* c13 */
      tmp10 += z2;
      tmp11 += z2;
  
      /* Final output stage */
  
      outptr[0]  = range_limit[(int) RIGHT_SHIFT(tmp20 + tmp0,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[15] = range_limit[(int) RIGHT_SHIFT(tmp20 - tmp0,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[1]  = range_limit[(int) RIGHT_SHIFT(tmp21 + tmp1,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[14] = range_limit[(int) RIGHT_SHIFT(tmp21 - tmp1,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[2]  = range_limit[(int) RIGHT_SHIFT(tmp22 + tmp2,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[13] = range_limit[(int) RIGHT_SHIFT(tmp22 - tmp2,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[3]  = range_limit[(int) RIGHT_SHIFT(tmp23 + tmp3,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[12] = range_limit[(int) RIGHT_SHIFT(tmp23 - tmp3,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[4]  = range_limit[(int) RIGHT_SHIFT(tmp24 + tmp10,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[11] = range_limit[(int) RIGHT_SHIFT(tmp24 - tmp10,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[5]  = range_limit[(int) RIGHT_SHIFT(tmp25 + tmp11,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[10] = range_limit[(int) RIGHT_SHIFT(tmp25 - tmp11,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[6]  = range_limit[(int) RIGHT_SHIFT(tmp26 + tmp12,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[9]  = range_limit[(int) RIGHT_SHIFT(tmp26 - tmp12,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[7]  = range_limit[(int) RIGHT_SHIFT(tmp27 + tmp13,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
      outptr[8]  = range_limit[(int) RIGHT_SHIFT(tmp27 - tmp13,
                                                 CONST_BITS+PASS1_BITS+3)
                               & RANGE_MASK];
  
      wsptr += 8;         /* advance pointer to next row */
    }
  }
  
  #endif /* IDCT_SCALING_SUPPORTED */
  #endif /* DCT_ISLOW_SUPPORTED */
  