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1651 lines
50 KiB
C
1651 lines
50 KiB
C
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/*
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* jidctfst.c
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*
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* Copyright (C) 1994-1998, Thomas G. Lane.
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* This file is part of the Independent JPEG Group's software.
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* For conditions of distribution and use, see the accompanying README file.
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*
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* This file contains a fast, not so accurate integer implementation of the
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* inverse DCT (Discrete Cosine Transform). In the IJG code, this routine
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* must also perform dequantization of the input coefficients.
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*
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* A 2-D IDCT can be done by 1-D IDCT on each column followed by 1-D IDCT
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* on each row (or vice versa, but it's more convenient to emit a row at
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* a time). Direct algorithms are also available, but they are much more
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* complex and seem not to be any faster when reduced to code.
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*
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* This implementation is based on Arai, Agui, and Nakajima's algorithm for
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* scaled DCT. Their original paper (Trans. IEICE E-71(11):1095) is in
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* Japanese, but the algorithm is described in the Pennebaker & Mitchell
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* JPEG textbook (see REFERENCES section in file README). The following code
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* is based directly on figure 4-8 in P&M.
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* While an 8-point DCT cannot be done in less than 11 multiplies, it is
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* possible to arrange the computation so that many of the multiplies are
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* simple scalings of the final outputs. These multiplies can then be
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* folded into the multiplications or divisions by the JPEG quantization
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* table entries. The AA&N method leaves only 5 multiplies and 29 adds
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* to be done in the DCT itself.
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* The primary disadvantage of this method is that with fixed-point math,
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* accuracy is lost due to imprecise representation of the scaled
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* quantization values. The smaller the quantization table entry, the less
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* precise the scaled value, so this implementation does worse with high-
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* quality-setting files than with low-quality ones.
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*/
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#define JPEG_INTERNALS
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#include "jinclude.h"
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#include "jpeglib.h"
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#include "jdct.h" /* Private declarations for DCT subsystem */
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#ifdef DCT_IFAST_SUPPORTED
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/*
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* This module is specialized to the case DCTSIZE = 8.
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*/
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#if DCTSIZE != 8
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Sorry, this code only copes with 8x8 DCTs. /* deliberate syntax err */
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#endif
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/* Scaling decisions are generally the same as in the LL&M algorithm;
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* see jidctint.c for more details. However, we choose to descale
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* (right shift) multiplication products as soon as they are formed,
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* rather than carrying additional fractional bits into subsequent additions.
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* This compromises accuracy slightly, but it lets us save a few shifts.
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* More importantly, 16-bit arithmetic is then adequate (for 8-bit samples)
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* everywhere except in the multiplications proper; this saves a good deal
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* of work on 16-bit-int machines.
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*
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* The dequantized coefficients are not integers because the AA&N scaling
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* factors have been incorporated. We represent them scaled up by PASS1_BITS,
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* so that the first and second IDCT rounds have the same input scaling.
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* For 8-bit JSAMPLEs, we choose IFAST_SCALE_BITS = PASS1_BITS so as to
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* avoid a descaling shift; this compromises accuracy rather drastically
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* for small quantization table entries, but it saves a lot of shifts.
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* For 12-bit JSAMPLEs, there's no hope of using 16x16 multiplies anyway,
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* so we use a much larger scaling factor to preserve accuracy.
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*
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* A final compromise is to represent the multiplicative constants to only
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* 8 fractional bits, rather than 13. This saves some shifting work on some
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* machines, and may also reduce the cost of multiplication (since there
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* are fewer one-bits in the constants).
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*/
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#if BITS_IN_JSAMPLE == 8
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#define CONST_BITS 8
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#define PASS1_BITS 2
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#else
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#define CONST_BITS 8
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#define PASS1_BITS 1 /* lose a little precision to avoid overflow */
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#endif
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/* Some C compilers fail to reduce "FIX(constant)" at compile time, thus
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* causing a lot of useless floating-point operations at run time.
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* To get around this we use the following pre-calculated constants.
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* If you change CONST_BITS you may want to add appropriate values.
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* (With a reasonable C compiler, you can just rely on the FIX() macro...)
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*/
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#if CONST_BITS == 8
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#define FIX_1_082392200 ((INT32) 277) /* FIX(1.082392200) */
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#define FIX_1_414213562 ((INT32) 362) /* FIX(1.414213562) */
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#define FIX_1_847759065 ((INT32) 473) /* FIX(1.847759065) */
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#define FIX_2_613125930 ((INT32) 669) /* FIX(2.613125930) */
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#else
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#define FIX_1_082392200 FIX(1.082392200)
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#define FIX_1_414213562 FIX(1.414213562)
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#define FIX_1_847759065 FIX(1.847759065)
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#define FIX_2_613125930 FIX(2.613125930)
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#endif
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/* We can gain a little more speed, with a further compromise in accuracy,
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* by omitting the addition in a descaling shift. This yields an incorrectly
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* rounded result half the time...
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*/
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#ifndef USE_ACCURATE_ROUNDING
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#undef DESCALE
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#define DESCALE(x,n) RIGHT_SHIFT(x, n)
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#endif
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/* Multiply a DCTELEM variable by an INT32 constant, and immediately
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* descale to yield a DCTELEM result.
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*/
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#define MULTIPLY(var,const) ((DCTELEM) DESCALE((var) * (const), CONST_BITS))
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/* Dequantize a coefficient by multiplying it by the multiplier-table
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* entry; produce a DCTELEM result. For 8-bit data a 16x16->16
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* multiplication will do. For 12-bit data, the multiplier table is
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* declared INT32, so a 32-bit multiply will be used.
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*/
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#if BITS_IN_JSAMPLE == 8
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#define DEQUANTIZE(coef,quantval) (((IFAST_MULT_TYPE) (coef)) * (quantval))
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#else
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#define DEQUANTIZE(coef,quantval) \
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DESCALE((coef)*(quantval), IFAST_SCALE_BITS-PASS1_BITS)
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#endif
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/* Like DESCALE, but applies to a DCTELEM and produces an int.
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* We assume that int right shift is unsigned if INT32 right shift is.
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*/
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#ifdef RIGHT_SHIFT_IS_UNSIGNED
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#define ISHIFT_TEMPS DCTELEM ishift_temp;
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#if BITS_IN_JSAMPLE == 8
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#define DCTELEMBITS 16 /* DCTELEM may be 16 or 32 bits */
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#else
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#define DCTELEMBITS 32 /* DCTELEM must be 32 bits */
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#endif
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#define IRIGHT_SHIFT(x,shft) \
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((ishift_temp = (x)) < 0 ? \
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(ishift_temp >> (shft)) | ((~((DCTELEM) 0)) << (DCTELEMBITS-(shft))) : \
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(ishift_temp >> (shft)))
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#else
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#define ISHIFT_TEMPS
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#define IRIGHT_SHIFT(x,shft) ((x) >> (shft))
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#endif
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#ifdef USE_ACCURATE_ROUNDING
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#define IDESCALE(x,n) ((int) IRIGHT_SHIFT((x) + (1 << ((n)-1)), n))
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#else
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#define IDESCALE(x,n) ((int) IRIGHT_SHIFT(x, n))
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#endif
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#ifdef HAVE_MMX_INTEL_MNEMONICS
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__inline GLOBAL(void)
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jpeg_idct_ifast_mmx (j_decompress_ptr cinfo, jpeg_component_info * compptr,
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JCOEFPTR coef_block,
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JSAMPARRAY output_buf, JDIMENSION output_col);
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__inline GLOBAL(void)
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jpeg_idct_ifast_orig (j_decompress_ptr cinfo, jpeg_component_info * compptr,
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JCOEFPTR coef_block,
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JSAMPARRAY output_buf, JDIMENSION output_col);
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#endif
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GLOBAL(void)
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jpeg_idct_ifast(j_decompress_ptr cinfo, jpeg_component_info * compptr,
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JCOEFPTR coef_block,
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JSAMPARRAY output_buf, JDIMENSION output_col);
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#ifdef HAVE_MMX_INTEL_MNEMONICS
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GLOBAL(void)
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jpeg_idct_ifast (j_decompress_ptr cinfo, jpeg_component_info * compptr,
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JCOEFPTR coef_block,
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JSAMPARRAY output_buf, JDIMENSION output_col)
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{
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if (MMXAvailable)
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jpeg_idct_ifast_mmx(cinfo, compptr, coef_block, output_buf, output_col);
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else
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jpeg_idct_ifast_orig(cinfo, compptr, coef_block, output_buf, output_col);
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}
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#else
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/*
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* Perform dequantization and inverse DCT on one block of coefficients.
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*/
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GLOBAL (void)
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jpeg_idct_ifast (j_decompress_ptr cinfo, jpeg_component_info * compptr,
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JCOEFPTR coef_block,
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JSAMPARRAY output_buf, JDIMENSION output_col)
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{
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DCTELEM tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
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DCTELEM tmp10, tmp11, tmp12, tmp13;
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DCTELEM z5, z10, z11, z12, z13;
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JCOEFPTR inptr;
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IFAST_MULT_TYPE * quantptr;
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int * wsptr;
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JSAMPROW outptr;
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JSAMPLE *range_limit = IDCT_range_limit(cinfo);
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int ctr;
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int workspace[DCTSIZE2]; /* buffers data between passes */
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SHIFT_TEMPS /* for DESCALE */
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ISHIFT_TEMPS /* for IDESCALE */
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/* Pass 1: process columns from input, store into work array. */
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inptr = coef_block;
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quantptr = (IFAST_MULT_TYPE *) compptr->dct_table;
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wsptr = workspace;
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for (ctr = DCTSIZE; ctr > 0; ctr--) {
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/* Due to quantization, we will usually find that many of the input
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* coefficients are zero, especially the AC terms. We can exploit this
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* by short-circuiting the IDCT calculation for any column in which all
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* the AC terms are zero. In that case each output is equal to the
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* DC coefficient (with scale factor as needed).
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* With typical images and quantization tables, half or more of the
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* column DCT calculations can be simplified this way.
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*/
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if (inptr[DCTSIZE*1] == 0 && inptr[DCTSIZE*2] == 0 &&
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inptr[DCTSIZE*3] == 0 && inptr[DCTSIZE*4] == 0 &&
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inptr[DCTSIZE*5] == 0 && inptr[DCTSIZE*6] == 0 &&
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inptr[DCTSIZE*7] == 0) {
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/* AC terms all zero */
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int dcval = (int) DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
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wsptr[DCTSIZE*0] = dcval;
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wsptr[DCTSIZE*1] = dcval;
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wsptr[DCTSIZE*2] = dcval;
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wsptr[DCTSIZE*3] = dcval;
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wsptr[DCTSIZE*4] = dcval;
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wsptr[DCTSIZE*5] = dcval;
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wsptr[DCTSIZE*6] = dcval;
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wsptr[DCTSIZE*7] = dcval;
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inptr++; /* advance pointers to next column */
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quantptr++;
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wsptr++;
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continue;
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}
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/* Even part */
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tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
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tmp1 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
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tmp2 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
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tmp3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
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tmp10 = tmp0 + tmp2; /* phase 3 */
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tmp11 = tmp0 - tmp2;
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tmp13 = tmp1 + tmp3; /* phases 5-3 */
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tmp12 = MULTIPLY(tmp1 - tmp3, FIX_1_414213562) - tmp13; /* 2*c4 */
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tmp0 = tmp10 + tmp13; /* phase 2 */
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tmp3 = tmp10 - tmp13;
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tmp1 = tmp11 + tmp12;
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tmp2 = tmp11 - tmp12;
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/* Odd part */
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tmp4 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
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tmp5 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
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tmp6 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
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tmp7 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
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z13 = tmp6 + tmp5; /* phase 6 */
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z10 = tmp6 - tmp5;
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z11 = tmp4 + tmp7;
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z12 = tmp4 - tmp7;
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tmp7 = z11 + z13; /* phase 5 */
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tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); /* 2*c4 */
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z5 = MULTIPLY(z10 + z12, FIX_1_847759065); /* 2*c2 */
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tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5; /* 2*(c2-c6) */
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tmp12 = MULTIPLY(z10, - FIX_2_613125930) + z5; /* -2*(c2+c6) */
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tmp6 = tmp12 - tmp7; /* phase 2 */
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tmp5 = tmp11 - tmp6;
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tmp4 = tmp10 + tmp5;
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wsptr[DCTSIZE*0] = (int) (tmp0 + tmp7);
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wsptr[DCTSIZE*7] = (int) (tmp0 - tmp7);
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wsptr[DCTSIZE*1] = (int) (tmp1 + tmp6);
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wsptr[DCTSIZE*6] = (int) (tmp1 - tmp6);
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wsptr[DCTSIZE*2] = (int) (tmp2 + tmp5);
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wsptr[DCTSIZE*5] = (int) (tmp2 - tmp5);
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wsptr[DCTSIZE*4] = (int) (tmp3 + tmp4);
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wsptr[DCTSIZE*3] = (int) (tmp3 - tmp4);
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inptr++; /* advance pointers to next column */
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quantptr++;
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wsptr++;
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}
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/* Pass 2: process rows from work array, store into output array. */
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/* Note that we must descale the results by a factor of 8 == 2**3, */
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/* and also undo the PASS1_BITS scaling. */
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wsptr = workspace;
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for (ctr = 0; ctr < DCTSIZE; ctr++) {
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outptr = output_buf[ctr] + output_col;
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/* Rows of zeroes can be exploited in the same way as we did with columns.
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* However, the column calculation has created many nonzero AC terms, so
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* the simplification applies less often (typically 5% to 10% of the time).
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* On machines with very fast multiplication, it's possible that the
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* test takes more time than it's worth. In that case this section
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* may be commented out.
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*/
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#ifndef NO_ZERO_ROW_TEST
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if (wsptr[1] == 0 && wsptr[2] == 0 && wsptr[3] == 0 && wsptr[4] == 0 &&
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wsptr[5] == 0 && wsptr[6] == 0 && wsptr[7] == 0) {
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/* AC terms all zero */
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JSAMPLE dcval = range_limit[IDESCALE(wsptr[0], PASS1_BITS+3)
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& RANGE_MASK];
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outptr[0] = dcval;
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outptr[1] = dcval;
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outptr[2] = dcval;
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outptr[3] = dcval;
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outptr[4] = dcval;
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outptr[5] = dcval;
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outptr[6] = dcval;
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outptr[7] = dcval;
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wsptr += DCTSIZE; /* advance pointer to next row */
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continue;
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}
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#endif
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/* Even part */
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tmp10 = ((DCTELEM) wsptr[0] + (DCTELEM) wsptr[4]);
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tmp11 = ((DCTELEM) wsptr[0] - (DCTELEM) wsptr[4]);
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tmp13 = ((DCTELEM) wsptr[2] + (DCTELEM) wsptr[6]);
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tmp12 = MULTIPLY((DCTELEM) wsptr[2] - (DCTELEM) wsptr[6], FIX_1_414213562)
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- tmp13;
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tmp0 = tmp10 + tmp13;
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tmp3 = tmp10 - tmp13;
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tmp1 = tmp11 + tmp12;
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tmp2 = tmp11 - tmp12;
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/* Odd part */
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z13 = (DCTELEM) wsptr[5] + (DCTELEM) wsptr[3];
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z10 = (DCTELEM) wsptr[5] - (DCTELEM) wsptr[3];
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z11 = (DCTELEM) wsptr[1] + (DCTELEM) wsptr[7];
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z12 = (DCTELEM) wsptr[1] - (DCTELEM) wsptr[7];
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tmp7 = z11 + z13; /* phase 5 */
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tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); /* 2*c4 */
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z5 = MULTIPLY(z10 + z12, FIX_1_847759065); /* 2*c2 */
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tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5; /* 2*(c2-c6) */
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||
|
tmp12 = MULTIPLY(z10, - FIX_2_613125930) + z5; /* -2*(c2+c6) */
|
||
|
|
||
|
tmp6 = tmp12 - tmp7; /* phase 2 */
|
||
|
tmp5 = tmp11 - tmp6;
|
||
|
tmp4 = tmp10 + tmp5;
|
||
|
|
||
|
/* Final output stage: scale down by a factor of 8 and range-limit */
|
||
|
|
||
|
outptr[0] = range_limit[IDESCALE(tmp0 + tmp7, PASS1_BITS+3)
|
||
|
& RANGE_MASK];
|
||
|
outptr[7] = range_limit[IDESCALE(tmp0 - tmp7, PASS1_BITS+3)
|
||
|
& RANGE_MASK];
|
||
|
outptr[1] = range_limit[IDESCALE(tmp1 + tmp6, PASS1_BITS+3)
|
||
|
& RANGE_MASK];
|
||
|
outptr[6] = range_limit[IDESCALE(tmp1 - tmp6, PASS1_BITS+3)
|
||
|
& RANGE_MASK];
|
||
|
outptr[2] = range_limit[IDESCALE(tmp2 + tmp5, PASS1_BITS+3)
|
||
|
& RANGE_MASK];
|
||
|
outptr[5] = range_limit[IDESCALE(tmp2 - tmp5, PASS1_BITS+3)
|
||
|
& RANGE_MASK];
|
||
|
outptr[4] = range_limit[IDESCALE(tmp3 + tmp4, PASS1_BITS+3)
|
||
|
& RANGE_MASK];
|
||
|
outptr[3] = range_limit[IDESCALE(tmp3 - tmp4, PASS1_BITS+3)
|
||
|
& RANGE_MASK];
|
||
|
|
||
|
wsptr += DCTSIZE; /* advance pointer to next row */
|
||
|
}
|
||
|
}
|
||
|
|
||
|
#endif
|
||
|
|
||
|
#ifdef HAVE_MMX_INTEL_MNEMONICS
|
||
|
|
||
|
|
||
|
_inline GLOBAL(void)
|
||
|
jpeg_idct_ifast_orig (j_decompress_ptr cinfo, jpeg_component_info * compptr,
|
||
|
JCOEFPTR coef_block,
|
||
|
JSAMPARRAY output_buf, JDIMENSION output_col)
|
||
|
{
|
||
|
DCTELEM tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
|
||
|
DCTELEM tmp10, tmp11, tmp12, tmp13;
|
||
|
DCTELEM z5, z10, z11, z12, z13;
|
||
|
JCOEFPTR inptr;
|
||
|
IFAST_MULT_TYPE * quantptr;
|
||
|
int * wsptr;
|
||
|
JSAMPROW outptr;
|
||
|
JSAMPLE *range_limit = IDCT_range_limit(cinfo);
|
||
|
int ctr;
|
||
|
int workspace[DCTSIZE2]; /* buffers data between passes */
|
||
|
SHIFT_TEMPS /* for DESCALE */
|
||
|
ISHIFT_TEMPS /* for IDESCALE */
|
||
|
|
||
|
/* Pass 1: process columns from input, store into work array. */
|
||
|
|
||
|
inptr = coef_block;
|
||
|
quantptr = (IFAST_MULT_TYPE *) compptr->dct_table;
|
||
|
wsptr = workspace;
|
||
|
for (ctr = DCTSIZE; ctr > 0; ctr--) {
|
||
|
/* Due to quantization, we will usually find that many of the input
|
||
|
* coefficients are zero, especially the AC terms. We can exploit this
|
||
|
* by short-circuiting the IDCT calculation for any column in which all
|
||
|
* the AC terms are zero. In that case each output is equal to the
|
||
|
* DC coefficient (with scale factor as needed).
|
||
|
* With typical images and quantization tables, half or more of the
|
||
|
* column DCT calculations can be simplified this way.
|
||
|
*/
|
||
|
|
||
|
if ((inptr[DCTSIZE*1] | inptr[DCTSIZE*2] | inptr[DCTSIZE*3] |
|
||
|
inptr[DCTSIZE*4] | inptr[DCTSIZE*5] | inptr[DCTSIZE*6] |
|
||
|
inptr[DCTSIZE*7]) == 0) {
|
||
|
/* AC terms all zero */
|
||
|
int dcval = (int) DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
|
||
|
|
||
|
wsptr[DCTSIZE*0] = dcval;
|
||
|
wsptr[DCTSIZE*1] = dcval;
|
||
|
wsptr[DCTSIZE*2] = dcval;
|
||
|
wsptr[DCTSIZE*3] = dcval;
|
||
|
wsptr[DCTSIZE*4] = dcval;
|
||
|
wsptr[DCTSIZE*5] = dcval;
|
||
|
wsptr[DCTSIZE*6] = dcval;
|
||
|
wsptr[DCTSIZE*7] = dcval;
|
||
|
|
||
|
inptr++; /* advance pointers to next column */
|
||
|
quantptr++;
|
||
|
wsptr++;
|
||
|
continue;
|
||
|
}
|
||
|
|
||
|
/* Even part */
|
||
|
|
||
|
tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
|
||
|
tmp1 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
|
||
|
tmp2 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
|
||
|
tmp3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
|
||
|
|
||
|
tmp10 = tmp0 + tmp2; /* phase 3 */
|
||
|
tmp11 = tmp0 - tmp2;
|
||
|
|
||
|
tmp13 = tmp1 + tmp3; /* phases 5-3 */
|
||
|
tmp12 = MULTIPLY(tmp1 - tmp3, FIX_1_414213562) - tmp13; /* 2*c4 */
|
||
|
|
||
|
tmp0 = tmp10 + tmp13; /* phase 2 */
|
||
|
tmp3 = tmp10 - tmp13;
|
||
|
tmp1 = tmp11 + tmp12;
|
||
|
tmp2 = tmp11 - tmp12;
|
||
|
|
||
|
/* Odd part */
|
||
|
|
||
|
tmp4 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
|
||
|
tmp5 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
|
||
|
tmp6 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
|
||
|
tmp7 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
|
||
|
|
||
|
z13 = tmp6 + tmp5; /* phase 6 */
|
||
|
z10 = tmp6 - tmp5;
|
||
|
z11 = tmp4 + tmp7;
|
||
|
z12 = tmp4 - tmp7;
|
||
|
|
||
|
tmp7 = z11 + z13; /* phase 5 */
|
||
|
tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); /* 2*c4 */
|
||
|
|
||
|
z5 = MULTIPLY(z10 + z12, FIX_1_847759065); /* 2*c2 */
|
||
|
tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5; /* 2*(c2-c6) */
|
||
|
tmp12 = MULTIPLY(z10, - FIX_2_613125930) + z5; /* -2*(c2+c6) */
|
||
|
|
||
|
tmp6 = tmp12 - tmp7; /* phase 2 */
|
||
|
tmp5 = tmp11 - tmp6;
|
||
|
tmp4 = tmp10 + tmp5;
|
||
|
|
||
|
wsptr[DCTSIZE*0] = (int) (tmp0 + tmp7);
|
||
|
wsptr[DCTSIZE*7] = (int) (tmp0 - tmp7);
|
||
|
wsptr[DCTSIZE*1] = (int) (tmp1 + tmp6);
|
||
|
wsptr[DCTSIZE*6] = (int) (tmp1 - tmp6);
|
||
|
wsptr[DCTSIZE*2] = (int) (tmp2 + tmp5);
|
||
|
wsptr[DCTSIZE*5] = (int) (tmp2 - tmp5);
|
||
|
wsptr[DCTSIZE*4] = (int) (tmp3 + tmp4);
|
||
|
wsptr[DCTSIZE*3] = (int) (tmp3 - tmp4);
|
||
|
|
||
|
inptr++; /* advance pointers to next column */
|
||
|
quantptr++;
|
||
|
wsptr++;
|
||
|
}
|
||
|
|
||
|
/* Pass 2: process rows from work array, store into output array. */
|
||
|
/* Note that we must descale the results by a factor of 8 == 2**3, */
|
||
|
/* and also undo the PASS1_BITS scaling. */
|
||
|
|
||
|
wsptr = workspace;
|
||
|
for (ctr = 0; ctr < DCTSIZE; ctr++) {
|
||
|
outptr = output_buf[ctr] + output_col;
|
||
|
/* Rows of zeroes can be exploited in the same way as we did with columns.
|
||
|
* However, the column calculation has created many nonzero AC terms, so
|
||
|
* the simplification applies less often (typically 5% to 10% of the time).
|
||
|
* On machines with very fast multiplication, it's possible that the
|
||
|
* test takes more time than it's worth. In that case this section
|
||
|
* may be commented out.
|
||
|
*/
|
||
|
|
||
|
#ifndef NO_ZERO_ROW_TEST
|
||
|
if ((wsptr[1] | wsptr[2] | wsptr[3] | wsptr[4] | wsptr[5] | wsptr[6] |
|
||
|
wsptr[7]) == 0) {
|
||
|
/* AC terms all zero */
|
||
|
JSAMPLE dcval = range_limit[IDESCALE(wsptr[0], PASS1_BITS+3)
|
||
|
& RANGE_MASK];
|
||
|
|
||
|
outptr[0] = dcval;
|
||
|
outptr[1] = dcval;
|
||
|
outptr[2] = dcval;
|
||
|
outptr[3] = dcval;
|
||
|
outptr[4] = dcval;
|
||
|
outptr[5] = dcval;
|
||
|
outptr[6] = dcval;
|
||
|
outptr[7] = dcval;
|
||
|
|
||
|
wsptr += DCTSIZE; /* advance pointer to next row */
|
||
|
continue;
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
/* Even part */
|
||
|
|
||
|
tmp10 = ((DCTELEM) wsptr[0] + (DCTELEM) wsptr[4]);
|
||
|
tmp11 = ((DCTELEM) wsptr[0] - (DCTELEM) wsptr[4]);
|
||
|
|
||
|
tmp13 = ((DCTELEM) wsptr[2] + (DCTELEM) wsptr[6]);
|
||
|
tmp12 = MULTIPLY((DCTELEM) wsptr[2] - (DCTELEM) wsptr[6], FIX_1_414213562)
|
||
|
- tmp13;
|
||
|
|
||
|
tmp0 = tmp10 + tmp13;
|
||
|
tmp3 = tmp10 - tmp13;
|
||
|
tmp1 = tmp11 + tmp12;
|
||
|
tmp2 = tmp11 - tmp12;
|
||
|
|
||
|
/* Odd part */
|
||
|
|
||
|
z13 = (DCTELEM) wsptr[5] + (DCTELEM) wsptr[3];
|
||
|
z10 = (DCTELEM) wsptr[5] - (DCTELEM) wsptr[3];
|
||
|
z11 = (DCTELEM) wsptr[1] + (DCTELEM) wsptr[7];
|
||
|
z12 = (DCTELEM) wsptr[1] - (DCTELEM) wsptr[7];
|
||
|
|
||
|
tmp7 = z11 + z13; /* phase 5 */
|
||
|
tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); /* 2*c4 */
|
||
|
|
||
|
z5 = MULTIPLY(z10 + z12, FIX_1_847759065); /* 2*c2 */
|
||
|
tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5; /* 2*(c2-c6) */
|
||
|
tmp12 = MULTIPLY(z10, - FIX_2_613125930) + z5; /* -2*(c2+c6) */
|
||
|
|
||
|
tmp6 = tmp12 - tmp7; /* phase 2 */
|
||
|
tmp5 = tmp11 - tmp6;
|
||
|
tmp4 = tmp10 + tmp5;
|
||
|
|
||
|
/* Final output stage: scale down by a factor of 8 and range-limit */
|
||
|
|
||
|
outptr[0] = range_limit[IDESCALE(tmp0 + tmp7, PASS1_BITS+3)
|
||
|
& RANGE_MASK];
|
||
|
outptr[7] = range_limit[IDESCALE(tmp0 - tmp7, PASS1_BITS+3)
|
||
|
& RANGE_MASK];
|
||
|
outptr[1] = range_limit[IDESCALE(tmp1 + tmp6, PASS1_BITS+3)
|
||
|
& RANGE_MASK];
|
||
|
outptr[6] = range_limit[IDESCALE(tmp1 - tmp6, PASS1_BITS+3)
|
||
|
& RANGE_MASK];
|
||
|
outptr[2] = range_limit[IDESCALE(tmp2 + tmp5, PASS1_BITS+3)
|
||
|
& RANGE_MASK];
|
||
|
outptr[5] = range_limit[IDESCALE(tmp2 - tmp5, PASS1_BITS+3)
|
||
|
& RANGE_MASK];
|
||
|
outptr[4] = range_limit[IDESCALE(tmp3 + tmp4, PASS1_BITS+3)
|
||
|
& RANGE_MASK];
|
||
|
outptr[3] = range_limit[IDESCALE(tmp3 - tmp4, PASS1_BITS+3)
|
||
|
& RANGE_MASK];
|
||
|
|
||
|
wsptr += DCTSIZE; /* advance pointer to next row */
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
static __int64 fix_141 = 0x5a825a825a825a82;
|
||
|
static __int64 fix_184n261 = 0xcf04cf04cf04cf04;
|
||
|
static __int64 fix_184 = 0x7641764176417641;
|
||
|
static __int64 fix_n184 = 0x896f896f896f896f;
|
||
|
static __int64 fix_108n184 = 0xcf04cf04cf04cf04;
|
||
|
static __int64 const_0x0080 = 0x0080008000800080;
|
||
|
|
||
|
|
||
|
__inline GLOBAL(void)
|
||
|
jpeg_idct_ifast_mmx (j_decompress_ptr cinfo, jpeg_component_info * compptr,
|
||
|
JCOEFPTR inptr,
|
||
|
JSAMPARRAY outptr, JDIMENSION output_col)
|
||
|
{
|
||
|
|
||
|
int16 workspace[DCTSIZE2 + 4]; /* buffers data between passes */
|
||
|
int16 *wsptr=workspace;
|
||
|
int16 *quantptr=compptr->dct_table;
|
||
|
|
||
|
__asm{
|
||
|
|
||
|
mov edi, quantptr
|
||
|
mov ebx, inptr
|
||
|
mov esi, wsptr
|
||
|
add esi, 0x07 ;align wsptr to qword
|
||
|
and esi, 0xfffffff8 ;align wsptr to qword
|
||
|
|
||
|
mov eax, esi
|
||
|
|
||
|
/* Odd part */
|
||
|
|
||
|
|
||
|
movq mm1, [ebx + 8*10] ;load inptr[DCTSIZE*5]
|
||
|
|
||
|
pmullw mm1, [edi + 8*10] ;tmp6 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
|
||
|
|
||
|
movq mm0, [ebx + 8*6] ;load inptr[DCTSIZE*3]
|
||
|
|
||
|
pmullw mm0, [edi + 8*6] ;tmp5 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
|
||
|
|
||
|
movq mm3, [ebx + 8*2] ;load inptr[DCTSIZE*1]
|
||
|
movq mm2, mm1 ;copy tmp6 /* phase 6 */
|
||
|
|
||
|
pmullw mm3, [edi + 8*2] ;tmp4 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
|
||
|
|
||
|
movq mm4, [ebx + 8*14] ;load inptr[DCTSIZE*1]
|
||
|
paddw mm1, mm0 ;z13 = tmp6 + tmp5;
|
||
|
|
||
|
pmullw mm4, [edi + 8*14] ;tmp7 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
|
||
|
psubw mm2, mm0 ;z10 = tmp6 - tmp5
|
||
|
|
||
|
psllw mm2, 2 ;shift z10
|
||
|
movq mm0, mm2 ;copy z10
|
||
|
|
||
|
pmulhw mm2, fix_184n261 ;MULTIPLY( z12, FIX_1_847759065); /* 2*c2 */
|
||
|
movq mm5, mm3 ;copy tmp4
|
||
|
|
||
|
pmulhw mm0, fix_n184 ;MULTIPLY(z10, -FIX_1_847759065); /* 2*c2 */
|
||
|
paddw mm3, mm4 ;z11 = tmp4 + tmp7;
|
||
|
|
||
|
movq mm6, mm3 ;copy z11 /* phase 5 */
|
||
|
psubw mm5, mm4 ;z12 = tmp4 - tmp7;
|
||
|
|
||
|
psubw mm6, mm1 ;z11-z13
|
||
|
psllw mm5, 2 ;shift z12
|
||
|
|
||
|
movq mm4, [ebx + 8*12] ;load inptr[DCTSIZE*6], even part
|
||
|
movq mm7, mm5 ;copy z12
|
||
|
|
||
|
pmulhw mm5, fix_108n184 ;MULT(z12, (FIX_1_08-FIX_1_84)) //- z5; /* 2*(c2-c6) */ even part
|
||
|
paddw mm3, mm1 ;tmp7 = z11 + z13;
|
||
|
|
||
|
|
||
|
/* Even part */
|
||
|
pmulhw mm7, fix_184 ;MULTIPLY(z10,(FIX_1_847759065 - FIX_2_613125930)) //+ z5; /* -2*(c2+c6) */
|
||
|
psllw mm6, 2
|
||
|
|
||
|
movq mm1, [ebx + 8*4] ;load inptr[DCTSIZE*2]
|
||
|
|
||
|
pmullw mm1, [edi + 8*4] ;tmp1 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
|
||
|
paddw mm0, mm5 ;tmp10
|
||
|
|
||
|
pmullw mm4, [edi + 8*12] ;tmp3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
|
||
|
paddw mm2, mm7 ;tmp12
|
||
|
|
||
|
pmulhw mm6, fix_141 ;tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); /* 2*c4 */
|
||
|
psubw mm2, mm3 ;tmp6 = tmp12 - tmp7
|
||
|
|
||
|
movq mm5, mm1 ;copy tmp1
|
||
|
paddw mm1, mm4 ;tmp13= tmp1 + tmp3; /* phases 5-3 */
|
||
|
|
||
|
psubw mm5, mm4 ;tmp1-tmp3
|
||
|
psubw mm6, mm2 ;tmp5 = tmp11 - tmp6;
|
||
|
|
||
|
movq [esi+8*0], mm1 ;save tmp13 in workspace
|
||
|
psllw mm5, 2 ;shift tmp1-tmp3
|
||
|
|
||
|
movq mm7, [ebx + 8*0] ;load inptr[DCTSIZE*0]
|
||
|
|
||
|
pmulhw mm5, fix_141 ;MULTIPLY(tmp1 - tmp3, FIX_1_414213562)
|
||
|
paddw mm0, mm6 ;tmp4 = tmp10 + tmp5;
|
||
|
|
||
|
pmullw mm7, [edi + 8*0] ;tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
|
||
|
|
||
|
movq mm4, [ebx + 8*8] ;load inptr[DCTSIZE*4]
|
||
|
|
||
|
pmullw mm4, [edi + 8*8] ;tmp2 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
|
||
|
psubw mm5, mm1 ;tmp12 = MULTIPLY(tmp1 - tmp3, FIX_1_414213562) - tmp13; /* 2*c4 */
|
||
|
|
||
|
movq [esi+8*4], mm0 ;save tmp4 in workspace
|
||
|
movq mm1, mm7 ;copy tmp0 /* phase 3 */
|
||
|
|
||
|
movq [esi+8*2], mm5 ;save tmp12 in workspace
|
||
|
psubw mm1, mm4 ;tmp11 = tmp0 - tmp2;
|
||
|
|
||
|
paddw mm7, mm4 ;tmp10 = tmp0 + tmp2;
|
||
|
movq mm5, mm1 ;copy tmp11
|
||
|
|
||
|
paddw mm1, [esi+8*2] ;tmp1 = tmp11 + tmp12;
|
||
|
movq mm4, mm7 ;copy tmp10 /* phase 2 */
|
||
|
|
||
|
paddw mm7, [esi+8*0] ;tmp0 = tmp10 + tmp13;
|
||
|
|
||
|
psubw mm4, [esi+8*0] ;tmp3 = tmp10 - tmp13;
|
||
|
movq mm0, mm7 ;copy tmp0
|
||
|
|
||
|
psubw mm5, [esi+8*2] ;tmp2 = tmp11 - tmp12;
|
||
|
paddw mm7, mm3 ;wsptr[DCTSIZE*0] = (int) (tmp0 + tmp7);
|
||
|
|
||
|
psubw mm0, mm3 ;wsptr[DCTSIZE*7] = (int) (tmp0 - tmp7);
|
||
|
|
||
|
movq [esi + 8*0], mm7 ;wsptr[DCTSIZE*0]
|
||
|
movq mm3, mm1 ;copy tmp1
|
||
|
|
||
|
movq [esi + 8*14], mm0 ;wsptr[DCTSIZE*7]
|
||
|
paddw mm1, mm2 ;wsptr[DCTSIZE*1] = (int) (tmp1 + tmp6);
|
||
|
|
||
|
psubw mm3, mm2 ;wsptr[DCTSIZE*6] = (int) (tmp1 - tmp6);
|
||
|
|
||
|
movq [esi + 8*2], mm1 ;wsptr[DCTSIZE*1]
|
||
|
movq mm1, mm4 ;copy tmp3
|
||
|
|
||
|
movq [esi + 8*12], mm3 ;wsptr[DCTSIZE*6]
|
||
|
|
||
|
paddw mm4, [esi+8*4] ;wsptr[DCTSIZE*4] = (int) (tmp3 + tmp4);
|
||
|
|
||
|
psubw mm1, [esi+8*4] ;wsptr[DCTSIZE*3] = (int) (tmp3 - tmp4);
|
||
|
|
||
|
movq [esi + 8*8], mm4
|
||
|
movq mm7, mm5 ;copy tmp2
|
||
|
|
||
|
paddw mm5, mm6 ;wsptr[DCTSIZE*2] = (int) (tmp2 + tmp5)
|
||
|
|
||
|
movq [esi+8*6], mm1 ;
|
||
|
psubw mm7, mm6 ;wsptr[DCTSIZE*5] = (int) (tmp2 - tmp5);
|
||
|
|
||
|
movq [esi + 8*4], mm5
|
||
|
|
||
|
movq [esi + 8*10], mm7
|
||
|
|
||
|
|
||
|
|
||
|
/*****************************************************************/
|
||
|
add edi, 8
|
||
|
add ebx, 8
|
||
|
add esi, 8
|
||
|
|
||
|
/*****************************************************************/
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
movq mm1, [ebx + 8*10] ;load inptr[DCTSIZE*5]
|
||
|
|
||
|
pmullw mm1, [edi + 8*10] ;tmp6 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
|
||
|
|
||
|
movq mm0, [ebx + 8*6] ;load inptr[DCTSIZE*3]
|
||
|
|
||
|
pmullw mm0, [edi + 8*6] ;tmp5 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
|
||
|
|
||
|
movq mm3, [ebx + 8*2] ;load inptr[DCTSIZE*1]
|
||
|
movq mm2, mm1 ;copy tmp6 /* phase 6 */
|
||
|
|
||
|
pmullw mm3, [edi + 8*2] ;tmp4 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
|
||
|
|
||
|
movq mm4, [ebx + 8*14] ;load inptr[DCTSIZE*1]
|
||
|
paddw mm1, mm0 ;z13 = tmp6 + tmp5;
|
||
|
|
||
|
pmullw mm4, [edi + 8*14] ;tmp7 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
|
||
|
psubw mm2, mm0 ;z10 = tmp6 - tmp5
|
||
|
|
||
|
psllw mm2, 2 ;shift z10
|
||
|
movq mm0, mm2 ;copy z10
|
||
|
|
||
|
pmulhw mm2, fix_184n261 ;MULTIPLY( z12, FIX_1_847759065); /* 2*c2 */
|
||
|
movq mm5, mm3 ;copy tmp4
|
||
|
|
||
|
pmulhw mm0, fix_n184 ;MULTIPLY(z10, -FIX_1_847759065); /* 2*c2 */
|
||
|
paddw mm3, mm4 ;z11 = tmp4 + tmp7;
|
||
|
|
||
|
movq mm6, mm3 ;copy z11 /* phase 5 */
|
||
|
psubw mm5, mm4 ;z12 = tmp4 - tmp7;
|
||
|
|
||
|
psubw mm6, mm1 ;z11-z13
|
||
|
psllw mm5, 2 ;shift z12
|
||
|
|
||
|
movq mm4, [ebx + 8*12] ;load inptr[DCTSIZE*6], even part
|
||
|
movq mm7, mm5 ;copy z12
|
||
|
|
||
|
pmulhw mm5, fix_108n184 ;MULT(z12, (FIX_1_08-FIX_1_84)) //- z5; /* 2*(c2-c6) */ even part
|
||
|
paddw mm3, mm1 ;tmp7 = z11 + z13;
|
||
|
|
||
|
|
||
|
/* Even part */
|
||
|
pmulhw mm7, fix_184 ;MULTIPLY(z10,(FIX_1_847759065 - FIX_2_613125930)) //+ z5; /* -2*(c2+c6) */
|
||
|
psllw mm6, 2
|
||
|
|
||
|
movq mm1, [ebx + 8*4] ;load inptr[DCTSIZE*2]
|
||
|
|
||
|
pmullw mm1, [edi + 8*4] ;tmp1 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
|
||
|
paddw mm0, mm5 ;tmp10
|
||
|
|
||
|
pmullw mm4, [edi + 8*12] ;tmp3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
|
||
|
paddw mm2, mm7 ;tmp12
|
||
|
|
||
|
pmulhw mm6, fix_141 ;tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); /* 2*c4 */
|
||
|
psubw mm2, mm3 ;tmp6 = tmp12 - tmp7
|
||
|
|
||
|
movq mm5, mm1 ;copy tmp1
|
||
|
paddw mm1, mm4 ;tmp13= tmp1 + tmp3; /* phases 5-3 */
|
||
|
|
||
|
psubw mm5, mm4 ;tmp1-tmp3
|
||
|
psubw mm6, mm2 ;tmp5 = tmp11 - tmp6;
|
||
|
|
||
|
movq [esi+8*0], mm1 ;save tmp13 in workspace
|
||
|
psllw mm5, 2 ;shift tmp1-tmp3
|
||
|
|
||
|
movq mm7, [ebx + 8*0] ;load inptr[DCTSIZE*0]
|
||
|
paddw mm0, mm6 ;tmp4 = tmp10 + tmp5;
|
||
|
|
||
|
pmulhw mm5, fix_141 ;MULTIPLY(tmp1 - tmp3, FIX_1_414213562)
|
||
|
|
||
|
pmullw mm7, [edi + 8*0] ;tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
|
||
|
|
||
|
movq mm4, [ebx + 8*8] ;load inptr[DCTSIZE*4]
|
||
|
|
||
|
pmullw mm4, [edi + 8*8] ;tmp2 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
|
||
|
psubw mm5, mm1 ;tmp12 = MULTIPLY(tmp1 - tmp3, FIX_1_414213562) - tmp13; /* 2*c4 */
|
||
|
|
||
|
movq [esi+8*4], mm0 ;save tmp4 in workspace
|
||
|
movq mm1, mm7 ;copy tmp0 /* phase 3 */
|
||
|
|
||
|
movq [esi+8*2], mm5 ;save tmp12 in workspace
|
||
|
psubw mm1, mm4 ;tmp11 = tmp0 - tmp2;
|
||
|
|
||
|
paddw mm7, mm4 ;tmp10 = tmp0 + tmp2;
|
||
|
movq mm5, mm1 ;copy tmp11
|
||
|
|
||
|
paddw mm1, [esi+8*2] ;tmp1 = tmp11 + tmp12;
|
||
|
movq mm4, mm7 ;copy tmp10 /* phase 2 */
|
||
|
|
||
|
paddw mm7, [esi+8*0] ;tmp0 = tmp10 + tmp13;
|
||
|
|
||
|
psubw mm4, [esi+8*0] ;tmp3 = tmp10 - tmp13;
|
||
|
movq mm0, mm7 ;copy tmp0
|
||
|
|
||
|
psubw mm5, [esi+8*2] ;tmp2 = tmp11 - tmp12;
|
||
|
paddw mm7, mm3 ;wsptr[DCTSIZE*0] = (int) (tmp0 + tmp7);
|
||
|
|
||
|
psubw mm0, mm3 ;wsptr[DCTSIZE*7] = (int) (tmp0 - tmp7);
|
||
|
|
||
|
movq [esi + 8*0], mm7 ;wsptr[DCTSIZE*0]
|
||
|
movq mm3, mm1 ;copy tmp1
|
||
|
|
||
|
movq [esi + 8*14], mm0 ;wsptr[DCTSIZE*7]
|
||
|
paddw mm1, mm2 ;wsptr[DCTSIZE*1] = (int) (tmp1 + tmp6);
|
||
|
|
||
|
psubw mm3, mm2 ;wsptr[DCTSIZE*6] = (int) (tmp1 - tmp6);
|
||
|
|
||
|
movq [esi + 8*2], mm1 ;wsptr[DCTSIZE*1]
|
||
|
movq mm1, mm4 ;copy tmp3
|
||
|
|
||
|
movq [esi + 8*12], mm3 ;wsptr[DCTSIZE*6]
|
||
|
|
||
|
paddw mm4, [esi+8*4] ;wsptr[DCTSIZE*4] = (int) (tmp3 + tmp4);
|
||
|
|
||
|
psubw mm1, [esi+8*4] ;wsptr[DCTSIZE*3] = (int) (tmp3 - tmp4);
|
||
|
|
||
|
movq [esi + 8*8], mm4
|
||
|
movq mm7, mm5 ;copy tmp2
|
||
|
|
||
|
paddw mm5, mm6 ;wsptr[DCTSIZE*2] = (int) (tmp2 + tmp5)
|
||
|
|
||
|
movq [esi+8*6], mm1 ;
|
||
|
psubw mm7, mm6 ;wsptr[DCTSIZE*5] = (int) (tmp2 - tmp5);
|
||
|
|
||
|
movq [esi + 8*4], mm5
|
||
|
|
||
|
movq [esi + 8*10], mm7
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
/*****************************************************************/
|
||
|
|
||
|
/* Pass 2: process rows from work array, store into output array. */
|
||
|
/* Note that we must descale the results by a factor of 8 == 2**3, */
|
||
|
/* and also undo the PASS1_BITS scaling. */
|
||
|
|
||
|
/*****************************************************************/
|
||
|
/* Even part */
|
||
|
|
||
|
mov esi, eax
|
||
|
mov eax, outptr
|
||
|
|
||
|
// tmp10 = ((DCTELEM) wsptr[0] + (DCTELEM) wsptr[4]);
|
||
|
// tmp13 = ((DCTELEM) wsptr[2] + (DCTELEM) wsptr[6]);
|
||
|
// tmp11 = ((DCTELEM) wsptr[0] - (DCTELEM) wsptr[4]);
|
||
|
// tmp14 = ((DCTELEM) wsptr[2] - (DCTELEM) wsptr[6]);
|
||
|
movq mm0, [esi+8*0] ;wsptr[0,0],[0,1],[0,2],[0,3]
|
||
|
|
||
|
movq mm1, [esi+8*1] ;wsptr[0,4],[0,5],[0,6],[0,7]
|
||
|
movq mm2, mm0
|
||
|
|
||
|
movq mm3, [esi+8*2] ;wsptr[1,0],[1,1],[1,2],[1,3]
|
||
|
paddw mm0, mm1 ;wsptr[0,tmp10],[xxx],[0,tmp13],[xxx]
|
||
|
|
||
|
movq mm4, [esi+8*3] ;wsptr[1,4],[1,5],[1,6],[1,7]
|
||
|
psubw mm2, mm1 ;wsptr[0,tmp11],[xxx],[0,tmp14],[xxx]
|
||
|
|
||
|
movq mm6, mm0
|
||
|
movq mm5, mm3
|
||
|
|
||
|
paddw mm3, mm4 ;wsptr[1,tmp10],[xxx],[1,tmp13],[xxx]
|
||
|
movq mm1, mm2
|
||
|
|
||
|
psubw mm5, mm4 ;wsptr[1,tmp11],[xxx],[1,tmp14],[xxx]
|
||
|
punpcklwd mm0, mm3 ;wsptr[0,tmp10],[1,tmp10],[xxx],[xxx]
|
||
|
|
||
|
movq mm7, [esi+8*7] ;wsptr[3,4],[3,5],[3,6],[3,7]
|
||
|
punpckhwd mm6, mm3 ;wsptr[0,tmp13],[1,tmp13],[xxx],[xxx]
|
||
|
|
||
|
movq mm3, [esi+8*4] ;wsptr[2,0],[2,1],[2,2],[2,3]
|
||
|
punpckldq mm0, mm6 ;wsptr[0,tmp10],[1,tmp10],[0,tmp13],[1,tmp13]
|
||
|
|
||
|
punpcklwd mm1, mm5 ;wsptr[0,tmp11],[1,tmp11],[xxx],[xxx]
|
||
|
movq mm4, mm3
|
||
|
|
||
|
movq mm6, [esi+8*6] ;wsptr[3,0],[3,1],[3,2],[3,3]
|
||
|
punpckhwd mm2, mm5 ;wsptr[0,tmp14],[1,tmp14],[xxx],[xxx]
|
||
|
|
||
|
movq mm5, [esi+8*5] ;wsptr[2,4],[2,5],[2,6],[2,7]
|
||
|
punpckldq mm1, mm2 ;wsptr[0,tmp11],[1,tmp11],[0,tmp14],[1,tmp14]
|
||
|
|
||
|
|
||
|
paddw mm3, mm5 ;wsptr[2,tmp10],[xxx],[2,tmp13],[xxx]
|
||
|
movq mm2, mm6
|
||
|
|
||
|
psubw mm4, mm5 ;wsptr[2,tmp11],[xxx],[2,tmp14],[xxx]
|
||
|
paddw mm6, mm7 ;wsptr[3,tmp10],[xxx],[3,tmp13],[xxx]
|
||
|
|
||
|
movq mm5, mm3
|
||
|
punpcklwd mm3, mm6 ;wsptr[2,tmp10],[3,tmp10],[xxx],[xxx]
|
||
|
|
||
|
psubw mm2, mm7 ;wsptr[3,tmp11],[xxx],[3,tmp14],[xxx]
|
||
|
punpckhwd mm5, mm6 ;wsptr[2,tmp13],[3,tmp13],[xxx],[xxx]
|
||
|
|
||
|
movq mm7, mm4
|
||
|
punpckldq mm3, mm5 ;wsptr[2,tmp10],[3,tmp10],[2,tmp13],[3,tmp13]
|
||
|
|
||
|
punpcklwd mm4, mm2 ;wsptr[2,tmp11],[3,tmp11],[xxx],[xxx]
|
||
|
|
||
|
punpckhwd mm7, mm2 ;wsptr[2,tmp14],[3,tmp14],[xxx],[xxx]
|
||
|
|
||
|
punpckldq mm4, mm7 ;wsptr[2,tmp11],[3,tmp11],[2,tmp14],[3,tmp14]
|
||
|
movq mm6, mm1
|
||
|
|
||
|
// mm0 = ;wsptr[0,tmp10],[1,tmp10],[0,tmp13],[1,tmp13]
|
||
|
// mm1 = ;wsptr[0,tmp11],[1,tmp11],[0,tmp14],[1,tmp14]
|
||
|
|
||
|
|
||
|
movq mm2, mm0
|
||
|
punpckhdq mm6, mm4 ;wsptr[0,tmp14],[1,tmp14],[2,tmp14],[3,tmp14]
|
||
|
|
||
|
punpckldq mm1, mm4 ;wsptr[0,tmp11],[1,tmp11],[2,tmp11],[3,tmp11]
|
||
|
psllw mm6, 2
|
||
|
|
||
|
pmulhw mm6, fix_141
|
||
|
punpckldq mm0, mm3 ;wsptr[0,tmp10],[1,tmp10],[2,tmp10],[3,tmp10]
|
||
|
|
||
|
punpckhdq mm2, mm3 ;wsptr[0,tmp13],[1,tmp13],[2,tmp13],[3,tmp13]
|
||
|
movq mm7, mm0
|
||
|
|
||
|
// tmp0 = tmp10 + tmp13;
|
||
|
// tmp3 = tmp10 - tmp13;
|
||
|
paddw mm0, mm2 ;[0,tmp0],[1,tmp0],[2,tmp0],[3,tmp0]
|
||
|
psubw mm7, mm2 ;[0,tmp3],[1,tmp3],[2,tmp3],[3,tmp3]
|
||
|
|
||
|
// tmp12 = MULTIPLY(tmp14, FIX_1_414213562) - tmp13;
|
||
|
psubw mm6, mm2 ;wsptr[0,tmp12],[1,tmp12],[2,tmp12],[3,tmp12]
|
||
|
// tmp1 = tmp11 + tmp12;
|
||
|
// tmp2 = tmp11 - tmp12;
|
||
|
movq mm5, mm1
|
||
|
|
||
|
|
||
|
|
||
|
/* Odd part */
|
||
|
|
||
|
// z13 = (DCTELEM) wsptr[5] + (DCTELEM) wsptr[3];
|
||
|
// z10 = (DCTELEM) wsptr[5] - (DCTELEM) wsptr[3];
|
||
|
// z11 = (DCTELEM) wsptr[1] + (DCTELEM) wsptr[7];
|
||
|
// z12 = (DCTELEM) wsptr[1] - (DCTELEM) wsptr[7];
|
||
|
movq mm3, [esi+8*0] ;wsptr[0,0],[0,1],[0,2],[0,3]
|
||
|
paddw mm1, mm6 ;[0,tmp1],[1,tmp1],[2,tmp1],[3,tmp1]
|
||
|
|
||
|
movq mm4, [esi+8*1] ;wsptr[0,4],[0,5],[0,6],[0,7]
|
||
|
psubw mm5, mm6 ;[0,tmp2],[1,tmp2],[2,tmp2],[3,tmp2]
|
||
|
|
||
|
movq mm6, mm3
|
||
|
punpckldq mm3, mm4 ;wsptr[0,0],[0,1],[0,4],[0,5]
|
||
|
|
||
|
punpckhdq mm4, mm6 ;wsptr[0,6],[0,7],[0,2],[0,3]
|
||
|
movq mm2, mm3
|
||
|
|
||
|
//Save tmp0 and tmp1 in wsptr
|
||
|
movq [esi+8*0], mm0 ;save tmp0
|
||
|
paddw mm2, mm4 ;wsptr[xxx],[0,z11],[xxx],[0,z13]
|
||
|
|
||
|
|
||
|
//Continue with z10 --- z13
|
||
|
movq mm6, [esi+8*2] ;wsptr[1,0],[1,1],[1,2],[1,3]
|
||
|
psubw mm3, mm4 ;wsptr[xxx],[0,z12],[xxx],[0,z10]
|
||
|
|
||
|
movq mm0, [esi+8*3] ;wsptr[1,4],[1,5],[1,6],[1,7]
|
||
|
movq mm4, mm6
|
||
|
|
||
|
movq [esi+8*1], mm1 ;save tmp1
|
||
|
punpckldq mm6, mm0 ;wsptr[1,0],[1,1],[1,4],[1,5]
|
||
|
|
||
|
punpckhdq mm0, mm4 ;wsptr[1,6],[1,7],[1,2],[1,3]
|
||
|
movq mm1, mm6
|
||
|
|
||
|
//Save tmp2 and tmp3 in wsptr
|
||
|
paddw mm6, mm0 ;wsptr[xxx],[1,z11],[xxx],[1,z13]
|
||
|
movq mm4, mm2
|
||
|
|
||
|
//Continue with z10 --- z13
|
||
|
movq [esi+8*2], mm5 ;save tmp2
|
||
|
punpcklwd mm2, mm6 ;wsptr[xxx],[xxx],[0,z11],[1,z11]
|
||
|
|
||
|
psubw mm1, mm0 ;wsptr[xxx],[1,z12],[xxx],[1,z10]
|
||
|
punpckhwd mm4, mm6 ;wsptr[xxx],[xxx],[0,z13],[1,z13]
|
||
|
|
||
|
movq mm0, mm3
|
||
|
punpcklwd mm3, mm1 ;wsptr[xxx],[xxx],[0,z12],[1,z12]
|
||
|
|
||
|
movq [esi+8*3], mm7 ;save tmp3
|
||
|
punpckhwd mm0, mm1 ;wsptr[xxx],[xxx],[0,z10],[1,z10]
|
||
|
|
||
|
movq mm6, [esi+8*4] ;wsptr[2,0],[2,1],[2,2],[2,3]
|
||
|
punpckhdq mm0, mm2 ;wsptr[0,z10],[1,z10],[0,z11],[1,z11]
|
||
|
|
||
|
movq mm7, [esi+8*5] ;wsptr[2,4],[2,5],[2,6],[2,7]
|
||
|
punpckhdq mm3, mm4 ;wsptr[0,z12],[1,z12],[0,z13],[1,z13]
|
||
|
|
||
|
movq mm1, [esi+8*6] ;wsptr[3,0],[3,1],[3,2],[3,3]
|
||
|
movq mm4, mm6
|
||
|
|
||
|
punpckldq mm6, mm7 ;wsptr[2,0],[2,1],[2,4],[2,5]
|
||
|
movq mm5, mm1
|
||
|
|
||
|
punpckhdq mm7, mm4 ;wsptr[2,6],[2,7],[2,2],[2,3]
|
||
|
movq mm2, mm6
|
||
|
|
||
|
movq mm4, [esi+8*7] ;wsptr[3,4],[3,5],[3,6],[3,7]
|
||
|
paddw mm6, mm7 ;wsptr[xxx],[2,z11],[xxx],[2,z13]
|
||
|
|
||
|
psubw mm2, mm7 ;wsptr[xxx],[2,z12],[xxx],[2,z10]
|
||
|
punpckldq mm1, mm4 ;wsptr[3,0],[3,1],[3,4],[3,5]
|
||
|
|
||
|
punpckhdq mm4, mm5 ;wsptr[3,6],[3,7],[3,2],[3,3]
|
||
|
movq mm7, mm1
|
||
|
|
||
|
paddw mm1, mm4 ;wsptr[xxx],[3,z11],[xxx],[3,z13]
|
||
|
psubw mm7, mm4 ;wsptr[xxx],[3,z12],[xxx],[3,z10]
|
||
|
|
||
|
movq mm5, mm6
|
||
|
punpcklwd mm6, mm1 ;wsptr[xxx],[xxx],[2,z11],[3,z11]
|
||
|
|
||
|
punpckhwd mm5, mm1 ;wsptr[xxx],[xxx],[2,z13],[3,z13]
|
||
|
movq mm4, mm2
|
||
|
|
||
|
punpcklwd mm2, mm7 ;wsptr[xxx],[xxx],[2,z12],[3,z12]
|
||
|
|
||
|
punpckhwd mm4, mm7 ;wsptr[xxx],[xxx],[2,z10],[3,z10]
|
||
|
|
||
|
punpckhdq mm4, mm6 ;wsptr[2,z10],[3,z10],[2,z11],[3,z11]
|
||
|
|
||
|
punpckhdq mm2, mm5 ;wsptr[2,z12],[3,z12],[2,z13],[3,z13]
|
||
|
movq mm5, mm0
|
||
|
|
||
|
punpckldq mm0, mm4 ;wsptr[0,z10],[1,z10],[2,z10],[3,z10]
|
||
|
|
||
|
punpckhdq mm5, mm4 ;wsptr[0,z11],[1,z11],[2,z11],[3,z11]
|
||
|
movq mm4, mm3
|
||
|
|
||
|
punpckhdq mm4, mm2 ;wsptr[0,z13],[1,z13],[2,z13],[3,z13]
|
||
|
movq mm1, mm5
|
||
|
|
||
|
punpckldq mm3, mm2 ;wsptr[0,z12],[1,z12],[2,z12],[3,z12]
|
||
|
// tmp7 = z11 + z13; /* phase 5 */
|
||
|
// tmp8 = z11 - z13; /* phase 5 */
|
||
|
psubw mm1, mm4 ;tmp8
|
||
|
|
||
|
paddw mm5, mm4 ;tmp7
|
||
|
// tmp21 = MULTIPLY(tmp8, FIX_1_414213562); /* 2*c4 */
|
||
|
psllw mm1, 2
|
||
|
|
||
|
psllw mm0, 2
|
||
|
|
||
|
pmulhw mm1, fix_141 ;tmp21
|
||
|
// tmp20 = MULTIPLY(z12, (FIX_1_082392200- FIX_1_847759065)) /* 2*(c2-c6) */
|
||
|
// + MULTIPLY(z10, - FIX_1_847759065); /* 2*c2 */
|
||
|
psllw mm3, 2
|
||
|
movq mm7, mm0
|
||
|
|
||
|
pmulhw mm7, fix_n184
|
||
|
movq mm6, mm3
|
||
|
|
||
|
movq mm2, [esi+8*0] ;tmp0,final1
|
||
|
|
||
|
pmulhw mm6, fix_108n184
|
||
|
// tmp22 = MULTIPLY(z10,(FIX_1_847759065 - FIX_2_613125930)) /* -2*(c2+c6) */
|
||
|
// + MULTIPLY(z12, FIX_1_847759065); /* 2*c2 */
|
||
|
movq mm4, mm2 ;final1
|
||
|
|
||
|
pmulhw mm0, fix_184n261
|
||
|
paddw mm2, mm5 ;tmp0+tmp7,final1
|
||
|
|
||
|
pmulhw mm3, fix_184
|
||
|
psubw mm4, mm5 ;tmp0-tmp7,final1
|
||
|
|
||
|
// tmp6 = tmp22 - tmp7; /* phase 2 */
|
||
|
psraw mm2, 5 ;outptr[0,0],[1,0],[2,0],[3,0],final1
|
||
|
|
||
|
paddsw mm2, const_0x0080 ;final1
|
||
|
paddw mm7, mm6 ;tmp20
|
||
|
psraw mm4, 5 ;outptr[0,7],[1,7],[2,7],[3,7],final1
|
||
|
|
||
|
paddsw mm4, const_0x0080 ;final1
|
||
|
paddw mm3, mm0 ;tmp22
|
||
|
|
||
|
// tmp5 = tmp21 - tmp6;
|
||
|
psubw mm3, mm5 ;tmp6
|
||
|
|
||
|
// tmp4 = tmp20 + tmp5;
|
||
|
movq mm0, [esi+8*1] ;tmp1,final2
|
||
|
psubw mm1, mm3 ;tmp5
|
||
|
|
||
|
movq mm6, mm0 ;final2
|
||
|
paddw mm0, mm3 ;tmp1+tmp6,final2
|
||
|
|
||
|
/* Final output stage: scale down by a factor of 8 and range-limit */
|
||
|
|
||
|
|
||
|
// outptr[0] = range_limit[IDESCALE(tmp0 + tmp7, PASS1_BITS+3)
|
||
|
// & RANGE_MASK];
|
||
|
// outptr[7] = range_limit[IDESCALE(tmp0 - tmp7, PASS1_BITS+3)
|
||
|
// & RANGE_MASK]; final1
|
||
|
|
||
|
|
||
|
// outptr[1] = range_limit[IDESCALE(tmp1 + tmp6, PASS1_BITS+3)
|
||
|
// & RANGE_MASK];
|
||
|
// outptr[6] = range_limit[IDESCALE(tmp1 - tmp6, PASS1_BITS+3)
|
||
|
// & RANGE_MASK]; final2
|
||
|
psubw mm6, mm3 ;tmp1-tmp6,final2
|
||
|
psraw mm0, 5 ;outptr[0,1],[1,1],[2,1],[3,1]
|
||
|
|
||
|
paddsw mm0, const_0x0080
|
||
|
psraw mm6, 5 ;outptr[0,6],[1,6],[2,6],[3,6]
|
||
|
|
||
|
paddsw mm6, const_0x0080 ;need to check this value
|
||
|
packuswb mm0, mm4 ;out[0,1],[1,1],[2,1],[3,1],[0,7],[1,7],[2,7],[3,7]
|
||
|
|
||
|
movq mm5, [esi+8*2] ;tmp2,final3
|
||
|
packuswb mm2, mm6 ;out[0,0],[1,0],[2,0],[3,0],[0,6],[1,6],[2,6],[3,6]
|
||
|
|
||
|
// outptr[2] = range_limit[IDESCALE(tmp2 + tmp5, PASS1_BITS+3)
|
||
|
// & RANGE_MASK];
|
||
|
// outptr[5] = range_limit[IDESCALE(tmp2 - tmp5, PASS1_BITS+3)
|
||
|
// & RANGE_MASK]; final3
|
||
|
paddw mm7, mm1 ;tmp4
|
||
|
movq mm3, mm5
|
||
|
|
||
|
paddw mm5, mm1 ;tmp2+tmp5
|
||
|
psubw mm3, mm1 ;tmp2-tmp5
|
||
|
|
||
|
psraw mm5, 5 ;outptr[0,2],[1,2],[2,2],[3,2]
|
||
|
|
||
|
paddsw mm5, const_0x0080
|
||
|
movq mm4, [esi+8*3] ;tmp3,final4
|
||
|
psraw mm3, 5 ;outptr[0,5],[1,5],[2,5],[3,5]
|
||
|
|
||
|
paddsw mm3, const_0x0080
|
||
|
|
||
|
|
||
|
// outptr[4] = range_limit[IDESCALE(tmp3 + tmp4, PASS1_BITS+3)
|
||
|
// & RANGE_MASK];
|
||
|
// outptr[3] = range_limit[IDESCALE(tmp3 - tmp4, PASS1_BITS+3)
|
||
|
// & RANGE_MASK]; final4
|
||
|
movq mm6, mm4
|
||
|
paddw mm4, mm7 ;tmp3+tmp4
|
||
|
|
||
|
psubw mm6, mm7 ;tmp3-tmp4
|
||
|
psraw mm4, 5 ;outptr[0,4],[1,4],[2,4],[3,4]
|
||
|
mov ecx, [eax]
|
||
|
|
||
|
paddsw mm4, const_0x0080
|
||
|
psraw mm6, 5 ;outptr[0,3],[1,3],[2,3],[3,3]
|
||
|
|
||
|
paddsw mm6, const_0x0080
|
||
|
packuswb mm5, mm4 ;out[0,2],[1,2],[2,2],[3,2],[0,4],[1,4],[2,4],[3,4]
|
||
|
|
||
|
packuswb mm6, mm3 ;out[0,3],[1,3],[2,3],[3,3],[0,5],[1,5],[2,5],[3,5]
|
||
|
movq mm4, mm2
|
||
|
|
||
|
movq mm7, mm5
|
||
|
punpcklbw mm2, mm0 ;out[0,0],[0,1],[1,0],[1,1],[2,0],[2,1],[3,0],[3,1]
|
||
|
|
||
|
punpckhbw mm4, mm0 ;out[0,6],[0,7],[1,6],[1,7],[2,6],[2,7],[3,6],[3,7]
|
||
|
movq mm1, mm2
|
||
|
|
||
|
punpcklbw mm5, mm6 ;out[0,2],[0,3],[1,2],[1,3],[2,2],[2,3],[3,2],[3,3]
|
||
|
add eax, 4
|
||
|
|
||
|
punpckhbw mm7, mm6 ;out[0,4],[0,5],[1,4],[1,5],[2,4],[2,5],[3,4],[3,5]
|
||
|
|
||
|
punpcklwd mm2, mm5 ;out[0,0],[0,1],[0,2],[0,3],[1,0],[1,1],[1,2],[1,3]
|
||
|
add ecx, output_col
|
||
|
|
||
|
movq mm6, mm7
|
||
|
punpckhwd mm1, mm5 ;out[2,0],[2,1],[2,2],[2,3],[3,0],[3,1],[3,2],[3,3]
|
||
|
|
||
|
movq mm0, mm2
|
||
|
punpcklwd mm6, mm4 ;out[0,4],[0,5],[0,6],[0,7],[1,4],[1,5],[1,6],[1,7]
|
||
|
|
||
|
mov ebx, [eax]
|
||
|
punpckldq mm2, mm6 ;out[0,0],[0,1],[0,2],[0,3],[0,4],[0,5],[0,6],[0,7]
|
||
|
|
||
|
add eax, 4
|
||
|
movq mm3, mm1
|
||
|
|
||
|
add ebx, output_col
|
||
|
punpckhwd mm7, mm4 ;out[2,4],[2,5],[2,6],[2,7],[3,4],[3,5],[3,6],[3,7]
|
||
|
|
||
|
movq [ecx], mm2
|
||
|
punpckhdq mm0, mm6 ;out[1,0],[1,1],[1,2],[1,3],[1,4],[1,5],[1,6],[1,7]
|
||
|
|
||
|
mov ecx, [eax]
|
||
|
add eax, 4
|
||
|
add ecx, output_col
|
||
|
|
||
|
movq [ebx], mm0
|
||
|
punpckldq mm1, mm7 ;out[2,0],[2,1],[2,2],[2,3],[2,4],[2,5],[2,6],[2,7]
|
||
|
|
||
|
mov ebx, [eax]
|
||
|
|
||
|
add ebx, output_col
|
||
|
punpckhdq mm3, mm7 ;out[3,0],[3,1],[3,2],[3,3],[3,4],[3,5],[3,6],[3,7]
|
||
|
movq [ecx], mm1
|
||
|
|
||
|
|
||
|
movq [ebx], mm3
|
||
|
|
||
|
|
||
|
|
||
|
/*******************************************************************/
|
||
|
|
||
|
|
||
|
add esi, 64
|
||
|
add eax, 4
|
||
|
|
||
|
/*******************************************************************/
|
||
|
|
||
|
// tmp10 = ((DCTELEM) wsptr[0] + (DCTELEM) wsptr[4]);
|
||
|
// tmp13 = ((DCTELEM) wsptr[2] + (DCTELEM) wsptr[6]);
|
||
|
// tmp11 = ((DCTELEM) wsptr[0] - (DCTELEM) wsptr[4]);
|
||
|
// tmp14 = ((DCTELEM) wsptr[2] - (DCTELEM) wsptr[6]);
|
||
|
movq mm0, [esi+8*0] ;wsptr[0,0],[0,1],[0,2],[0,3]
|
||
|
|
||
|
movq mm1, [esi+8*1] ;wsptr[0,4],[0,5],[0,6],[0,7]
|
||
|
movq mm2, mm0
|
||
|
|
||
|
movq mm3, [esi+8*2] ;wsptr[1,0],[1,1],[1,2],[1,3]
|
||
|
paddw mm0, mm1 ;wsptr[0,tmp10],[xxx],[0,tmp13],[xxx]
|
||
|
|
||
|
movq mm4, [esi+8*3] ;wsptr[1,4],[1,5],[1,6],[1,7]
|
||
|
psubw mm2, mm1 ;wsptr[0,tmp11],[xxx],[0,tmp14],[xxx]
|
||
|
|
||
|
movq mm6, mm0
|
||
|
movq mm5, mm3
|
||
|
|
||
|
paddw mm3, mm4 ;wsptr[1,tmp10],[xxx],[1,tmp13],[xxx]
|
||
|
movq mm1, mm2
|
||
|
|
||
|
psubw mm5, mm4 ;wsptr[1,tmp11],[xxx],[1,tmp14],[xxx]
|
||
|
punpcklwd mm0, mm3 ;wsptr[0,tmp10],[1,tmp10],[xxx],[xxx]
|
||
|
|
||
|
movq mm7, [esi+8*7] ;wsptr[3,4],[3,5],[3,6],[3,7]
|
||
|
punpckhwd mm6, mm3 ;wsptr[0,tmp13],[1,tmp13],[xxx],[xxx]
|
||
|
|
||
|
movq mm3, [esi+8*4] ;wsptr[2,0],[2,1],[2,2],[2,3]
|
||
|
punpckldq mm0, mm6 ;wsptr[0,tmp10],[1,tmp10],[0,tmp13],[1,tmp13]
|
||
|
|
||
|
punpcklwd mm1, mm5 ;wsptr[0,tmp11],[1,tmp11],[xxx],[xxx]
|
||
|
movq mm4, mm3
|
||
|
|
||
|
movq mm6, [esi+8*6] ;wsptr[3,0],[3,1],[3,2],[3,3]
|
||
|
punpckhwd mm2, mm5 ;wsptr[0,tmp14],[1,tmp14],[xxx],[xxx]
|
||
|
|
||
|
movq mm5, [esi+8*5] ;wsptr[2,4],[2,5],[2,6],[2,7]
|
||
|
punpckldq mm1, mm2 ;wsptr[0,tmp11],[1,tmp11],[0,tmp14],[1,tmp14]
|
||
|
|
||
|
|
||
|
paddw mm3, mm5 ;wsptr[2,tmp10],[xxx],[2,tmp13],[xxx]
|
||
|
movq mm2, mm6
|
||
|
|
||
|
psubw mm4, mm5 ;wsptr[2,tmp11],[xxx],[2,tmp14],[xxx]
|
||
|
paddw mm6, mm7 ;wsptr[3,tmp10],[xxx],[3,tmp13],[xxx]
|
||
|
|
||
|
movq mm5, mm3
|
||
|
punpcklwd mm3, mm6 ;wsptr[2,tmp10],[3,tmp10],[xxx],[xxx]
|
||
|
|
||
|
psubw mm2, mm7 ;wsptr[3,tmp11],[xxx],[3,tmp14],[xxx]
|
||
|
punpckhwd mm5, mm6 ;wsptr[2,tmp13],[3,tmp13],[xxx],[xxx]
|
||
|
|
||
|
movq mm7, mm4
|
||
|
punpckldq mm3, mm5 ;wsptr[2,tmp10],[3,tmp10],[2,tmp13],[3,tmp13]
|
||
|
|
||
|
punpcklwd mm4, mm2 ;wsptr[2,tmp11],[3,tmp11],[xxx],[xxx]
|
||
|
|
||
|
punpckhwd mm7, mm2 ;wsptr[2,tmp14],[3,tmp14],[xxx],[xxx]
|
||
|
|
||
|
punpckldq mm4, mm7 ;wsptr[2,tmp11],[3,tmp11],[2,tmp14],[3,tmp14]
|
||
|
movq mm6, mm1
|
||
|
|
||
|
// mm0 = ;wsptr[0,tmp10],[1,tmp10],[0,tmp13],[1,tmp13]
|
||
|
// mm1 = ;wsptr[0,tmp11],[1,tmp11],[0,tmp14],[1,tmp14]
|
||
|
|
||
|
|
||
|
movq mm2, mm0
|
||
|
punpckhdq mm6, mm4 ;wsptr[0,tmp14],[1,tmp14],[2,tmp14],[3,tmp14]
|
||
|
|
||
|
punpckldq mm1, mm4 ;wsptr[0,tmp11],[1,tmp11],[2,tmp11],[3,tmp11]
|
||
|
psllw mm6, 2
|
||
|
|
||
|
pmulhw mm6, fix_141
|
||
|
punpckldq mm0, mm3 ;wsptr[0,tmp10],[1,tmp10],[2,tmp10],[3,tmp10]
|
||
|
|
||
|
punpckhdq mm2, mm3 ;wsptr[0,tmp13],[1,tmp13],[2,tmp13],[3,tmp13]
|
||
|
movq mm7, mm0
|
||
|
|
||
|
// tmp0 = tmp10 + tmp13;
|
||
|
// tmp3 = tmp10 - tmp13;
|
||
|
paddw mm0, mm2 ;[0,tmp0],[1,tmp0],[2,tmp0],[3,tmp0]
|
||
|
psubw mm7, mm2 ;[0,tmp3],[1,tmp3],[2,tmp3],[3,tmp3]
|
||
|
|
||
|
// tmp12 = MULTIPLY(tmp14, FIX_1_414213562) - tmp13;
|
||
|
psubw mm6, mm2 ;wsptr[0,tmp12],[1,tmp12],[2,tmp12],[3,tmp12]
|
||
|
// tmp1 = tmp11 + tmp12;
|
||
|
// tmp2 = tmp11 - tmp12;
|
||
|
movq mm5, mm1
|
||
|
|
||
|
|
||
|
|
||
|
/* Odd part */
|
||
|
|
||
|
// z13 = (DCTELEM) wsptr[5] + (DCTELEM) wsptr[3];
|
||
|
// z10 = (DCTELEM) wsptr[5] - (DCTELEM) wsptr[3];
|
||
|
// z11 = (DCTELEM) wsptr[1] + (DCTELEM) wsptr[7];
|
||
|
// z12 = (DCTELEM) wsptr[1] - (DCTELEM) wsptr[7];
|
||
|
movq mm3, [esi+8*0] ;wsptr[0,0],[0,1],[0,2],[0,3]
|
||
|
paddw mm1, mm6 ;[0,tmp1],[1,tmp1],[2,tmp1],[3,tmp1]
|
||
|
|
||
|
movq mm4, [esi+8*1] ;wsptr[0,4],[0,5],[0,6],[0,7]
|
||
|
psubw mm5, mm6 ;[0,tmp2],[1,tmp2],[2,tmp2],[3,tmp2]
|
||
|
|
||
|
movq mm6, mm3
|
||
|
punpckldq mm3, mm4 ;wsptr[0,0],[0,1],[0,4],[0,5]
|
||
|
|
||
|
punpckhdq mm4, mm6 ;wsptr[0,6],[0,7],[0,2],[0,3]
|
||
|
movq mm2, mm3
|
||
|
|
||
|
//Save tmp0 and tmp1 in wsptr
|
||
|
movq [esi+8*0], mm0 ;save tmp0
|
||
|
paddw mm2, mm4 ;wsptr[xxx],[0,z11],[xxx],[0,z13]
|
||
|
|
||
|
|
||
|
//Continue with z10 --- z13
|
||
|
movq mm6, [esi+8*2] ;wsptr[1,0],[1,1],[1,2],[1,3]
|
||
|
psubw mm3, mm4 ;wsptr[xxx],[0,z12],[xxx],[0,z10]
|
||
|
|
||
|
movq mm0, [esi+8*3] ;wsptr[1,4],[1,5],[1,6],[1,7]
|
||
|
movq mm4, mm6
|
||
|
|
||
|
movq [esi+8*1], mm1 ;save tmp1
|
||
|
punpckldq mm6, mm0 ;wsptr[1,0],[1,1],[1,4],[1,5]
|
||
|
|
||
|
punpckhdq mm0, mm4 ;wsptr[1,6],[1,7],[1,2],[1,3]
|
||
|
movq mm1, mm6
|
||
|
|
||
|
//Save tmp2 and tmp3 in wsptr
|
||
|
paddw mm6, mm0 ;wsptr[xxx],[1,z11],[xxx],[1,z13]
|
||
|
movq mm4, mm2
|
||
|
|
||
|
//Continue with z10 --- z13
|
||
|
movq [esi+8*2], mm5 ;save tmp2
|
||
|
punpcklwd mm2, mm6 ;wsptr[xxx],[xxx],[0,z11],[1,z11]
|
||
|
|
||
|
psubw mm1, mm0 ;wsptr[xxx],[1,z12],[xxx],[1,z10]
|
||
|
punpckhwd mm4, mm6 ;wsptr[xxx],[xxx],[0,z13],[1,z13]
|
||
|
|
||
|
movq mm0, mm3
|
||
|
punpcklwd mm3, mm1 ;wsptr[xxx],[xxx],[0,z12],[1,z12]
|
||
|
|
||
|
movq [esi+8*3], mm7 ;save tmp3
|
||
|
punpckhwd mm0, mm1 ;wsptr[xxx],[xxx],[0,z10],[1,z10]
|
||
|
|
||
|
movq mm6, [esi+8*4] ;wsptr[2,0],[2,1],[2,2],[2,3]
|
||
|
punpckhdq mm0, mm2 ;wsptr[0,z10],[1,z10],[0,z11],[1,z11]
|
||
|
|
||
|
movq mm7, [esi+8*5] ;wsptr[2,4],[2,5],[2,6],[2,7]
|
||
|
punpckhdq mm3, mm4 ;wsptr[0,z12],[1,z12],[0,z13],[1,z13]
|
||
|
|
||
|
movq mm1, [esi+8*6] ;wsptr[3,0],[3,1],[3,2],[3,3]
|
||
|
movq mm4, mm6
|
||
|
|
||
|
punpckldq mm6, mm7 ;wsptr[2,0],[2,1],[2,4],[2,5]
|
||
|
movq mm5, mm1
|
||
|
|
||
|
punpckhdq mm7, mm4 ;wsptr[2,6],[2,7],[2,2],[2,3]
|
||
|
movq mm2, mm6
|
||
|
|
||
|
movq mm4, [esi+8*7] ;wsptr[3,4],[3,5],[3,6],[3,7]
|
||
|
paddw mm6, mm7 ;wsptr[xxx],[2,z11],[xxx],[2,z13]
|
||
|
|
||
|
psubw mm2, mm7 ;wsptr[xxx],[2,z12],[xxx],[2,z10]
|
||
|
punpckldq mm1, mm4 ;wsptr[3,0],[3,1],[3,4],[3,5]
|
||
|
|
||
|
punpckhdq mm4, mm5 ;wsptr[3,6],[3,7],[3,2],[3,3]
|
||
|
movq mm7, mm1
|
||
|
|
||
|
paddw mm1, mm4 ;wsptr[xxx],[3,z11],[xxx],[3,z13]
|
||
|
psubw mm7, mm4 ;wsptr[xxx],[3,z12],[xxx],[3,z10]
|
||
|
|
||
|
movq mm5, mm6
|
||
|
punpcklwd mm6, mm1 ;wsptr[xxx],[xxx],[2,z11],[3,z11]
|
||
|
|
||
|
punpckhwd mm5, mm1 ;wsptr[xxx],[xxx],[2,z13],[3,z13]
|
||
|
movq mm4, mm2
|
||
|
|
||
|
punpcklwd mm2, mm7 ;wsptr[xxx],[xxx],[2,z12],[3,z12]
|
||
|
|
||
|
punpckhwd mm4, mm7 ;wsptr[xxx],[xxx],[2,z10],[3,z10]
|
||
|
|
||
|
punpckhdq mm4, mm6 ;wsptr[2,z10],[3,z10],[2,z11],[3,z11]
|
||
|
|
||
|
punpckhdq mm2, mm5 ;wsptr[2,z12],[3,z12],[2,z13],[3,z13]
|
||
|
movq mm5, mm0
|
||
|
|
||
|
punpckldq mm0, mm4 ;wsptr[0,z10],[1,z10],[2,z10],[3,z10]
|
||
|
|
||
|
punpckhdq mm5, mm4 ;wsptr[0,z11],[1,z11],[2,z11],[3,z11]
|
||
|
movq mm4, mm3
|
||
|
|
||
|
punpckhdq mm4, mm2 ;wsptr[0,z13],[1,z13],[2,z13],[3,z13]
|
||
|
movq mm1, mm5
|
||
|
|
||
|
punpckldq mm3, mm2 ;wsptr[0,z12],[1,z12],[2,z12],[3,z12]
|
||
|
// tmp7 = z11 + z13; /* phase 5 */
|
||
|
// tmp8 = z11 - z13; /* phase 5 */
|
||
|
psubw mm1, mm4 ;tmp8
|
||
|
|
||
|
paddw mm5, mm4 ;tmp7
|
||
|
// tmp21 = MULTIPLY(tmp8, FIX_1_414213562); /* 2*c4 */
|
||
|
psllw mm1, 2
|
||
|
|
||
|
psllw mm0, 2
|
||
|
|
||
|
pmulhw mm1, fix_141 ;tmp21
|
||
|
// tmp20 = MULTIPLY(z12, (FIX_1_082392200- FIX_1_847759065)) /* 2*(c2-c6) */
|
||
|
// + MULTIPLY(z10, - FIX_1_847759065); /* 2*c2 */
|
||
|
psllw mm3, 2
|
||
|
movq mm7, mm0
|
||
|
|
||
|
pmulhw mm7, fix_n184
|
||
|
movq mm6, mm3
|
||
|
|
||
|
movq mm2, [esi+8*0] ;tmp0,final1
|
||
|
|
||
|
pmulhw mm6, fix_108n184
|
||
|
// tmp22 = MULTIPLY(z10,(FIX_1_847759065 - FIX_2_613125930)) /* -2*(c2+c6) */
|
||
|
// + MULTIPLY(z12, FIX_1_847759065); /* 2*c2 */
|
||
|
movq mm4, mm2 ;final1
|
||
|
|
||
|
pmulhw mm0, fix_184n261
|
||
|
paddw mm2, mm5 ;tmp0+tmp7,final1
|
||
|
|
||
|
pmulhw mm3, fix_184
|
||
|
psubw mm4, mm5 ;tmp0-tmp7,final1
|
||
|
|
||
|
// tmp6 = tmp22 - tmp7; /* phase 2 */
|
||
|
psraw mm2, 5 ;outptr[0,0],[1,0],[2,0],[3,0],final1
|
||
|
|
||
|
paddsw mm2, const_0x0080 ;final1
|
||
|
paddw mm7, mm6 ;tmp20
|
||
|
psraw mm4, 5 ;outptr[0,7],[1,7],[2,7],[3,7],final1
|
||
|
|
||
|
paddsw mm4, const_0x0080 ;final1
|
||
|
paddw mm3, mm0 ;tmp22
|
||
|
|
||
|
// tmp5 = tmp21 - tmp6;
|
||
|
psubw mm3, mm5 ;tmp6
|
||
|
|
||
|
// tmp4 = tmp20 + tmp5;
|
||
|
movq mm0, [esi+8*1] ;tmp1,final2
|
||
|
psubw mm1, mm3 ;tmp5
|
||
|
|
||
|
movq mm6, mm0 ;final2
|
||
|
paddw mm0, mm3 ;tmp1+tmp6,final2
|
||
|
|
||
|
/* Final output stage: scale down by a factor of 8 and range-limit */
|
||
|
|
||
|
|
||
|
// outptr[0] = range_limit[IDESCALE(tmp0 + tmp7, PASS1_BITS+3)
|
||
|
// & RANGE_MASK];
|
||
|
// outptr[7] = range_limit[IDESCALE(tmp0 - tmp7, PASS1_BITS+3)
|
||
|
// & RANGE_MASK]; final1
|
||
|
|
||
|
|
||
|
// outptr[1] = range_limit[IDESCALE(tmp1 + tmp6, PASS1_BITS+3)
|
||
|
// & RANGE_MASK];
|
||
|
// outptr[6] = range_limit[IDESCALE(tmp1 - tmp6, PASS1_BITS+3)
|
||
|
// & RANGE_MASK]; final2
|
||
|
psubw mm6, mm3 ;tmp1-tmp6,final2
|
||
|
psraw mm0, 5 ;outptr[0,1],[1,1],[2,1],[3,1]
|
||
|
|
||
|
paddsw mm0, const_0x0080
|
||
|
psraw mm6, 5 ;outptr[0,6],[1,6],[2,6],[3,6]
|
||
|
|
||
|
paddsw mm6, const_0x0080 ;need to check this value
|
||
|
packuswb mm0, mm4 ;out[0,1],[1,1],[2,1],[3,1],[0,7],[1,7],[2,7],[3,7]
|
||
|
|
||
|
movq mm5, [esi+8*2] ;tmp2,final3
|
||
|
packuswb mm2, mm6 ;out[0,0],[1,0],[2,0],[3,0],[0,6],[1,6],[2,6],[3,6]
|
||
|
|
||
|
// outptr[2] = range_limit[IDESCALE(tmp2 + tmp5, PASS1_BITS+3)
|
||
|
// & RANGE_MASK];
|
||
|
// outptr[5] = range_limit[IDESCALE(tmp2 - tmp5, PASS1_BITS+3)
|
||
|
// & RANGE_MASK]; final3
|
||
|
paddw mm7, mm1 ;tmp4
|
||
|
movq mm3, mm5
|
||
|
|
||
|
paddw mm5, mm1 ;tmp2+tmp5
|
||
|
psubw mm3, mm1 ;tmp2-tmp5
|
||
|
|
||
|
psraw mm5, 5 ;outptr[0,2],[1,2],[2,2],[3,2]
|
||
|
|
||
|
paddsw mm5, const_0x0080
|
||
|
movq mm4, [esi+8*3] ;tmp3,final4
|
||
|
psraw mm3, 5 ;outptr[0,5],[1,5],[2,5],[3,5]
|
||
|
|
||
|
paddsw mm3, const_0x0080
|
||
|
|
||
|
|
||
|
// outptr[4] = range_limit[IDESCALE(tmp3 + tmp4, PASS1_BITS+3)
|
||
|
// & RANGE_MASK];
|
||
|
// outptr[3] = range_limit[IDESCALE(tmp3 - tmp4, PASS1_BITS+3)
|
||
|
// & RANGE_MASK]; final4
|
||
|
movq mm6, mm4
|
||
|
paddw mm4, mm7 ;tmp3+tmp4
|
||
|
|
||
|
psubw mm6, mm7 ;tmp3-tmp4
|
||
|
psraw mm4, 5 ;outptr[0,4],[1,4],[2,4],[3,4]
|
||
|
mov ecx, [eax]
|
||
|
|
||
|
paddsw mm4, const_0x0080
|
||
|
psraw mm6, 5 ;outptr[0,3],[1,3],[2,3],[3,3]
|
||
|
|
||
|
paddsw mm6, const_0x0080
|
||
|
packuswb mm5, mm4 ;out[0,2],[1,2],[2,2],[3,2],[0,4],[1,4],[2,4],[3,4]
|
||
|
|
||
|
packuswb mm6, mm3 ;out[0,3],[1,3],[2,3],[3,3],[0,5],[1,5],[2,5],[3,5]
|
||
|
movq mm4, mm2
|
||
|
|
||
|
movq mm7, mm5
|
||
|
punpcklbw mm2, mm0 ;out[0,0],[0,1],[1,0],[1,1],[2,0],[2,1],[3,0],[3,1]
|
||
|
|
||
|
punpckhbw mm4, mm0 ;out[0,6],[0,7],[1,6],[1,7],[2,6],[2,7],[3,6],[3,7]
|
||
|
movq mm1, mm2
|
||
|
|
||
|
punpcklbw mm5, mm6 ;out[0,2],[0,3],[1,2],[1,3],[2,2],[2,3],[3,2],[3,3]
|
||
|
add eax, 4
|
||
|
|
||
|
punpckhbw mm7, mm6 ;out[0,4],[0,5],[1,4],[1,5],[2,4],[2,5],[3,4],[3,5]
|
||
|
|
||
|
punpcklwd mm2, mm5 ;out[0,0],[0,1],[0,2],[0,3],[1,0],[1,1],[1,2],[1,3]
|
||
|
add ecx, output_col
|
||
|
|
||
|
movq mm6, mm7
|
||
|
punpckhwd mm1, mm5 ;out[2,0],[2,1],[2,2],[2,3],[3,0],[3,1],[3,2],[3,3]
|
||
|
|
||
|
movq mm0, mm2
|
||
|
punpcklwd mm6, mm4 ;out[0,4],[0,5],[0,6],[0,7],[1,4],[1,5],[1,6],[1,7]
|
||
|
|
||
|
mov ebx, [eax]
|
||
|
punpckldq mm2, mm6 ;out[0,0],[0,1],[0,2],[0,3],[0,4],[0,5],[0,6],[0,7]
|
||
|
|
||
|
add eax, 4
|
||
|
movq mm3, mm1
|
||
|
|
||
|
add ebx, output_col
|
||
|
punpckhwd mm7, mm4 ;out[2,4],[2,5],[2,6],[2,7],[3,4],[3,5],[3,6],[3,7]
|
||
|
|
||
|
movq [ecx], mm2
|
||
|
punpckhdq mm0, mm6 ;out[1,0],[1,1],[1,2],[1,3],[1,4],[1,5],[1,6],[1,7]
|
||
|
|
||
|
mov ecx, [eax]
|
||
|
add eax, 4
|
||
|
add ecx, output_col
|
||
|
|
||
|
movq [ebx], mm0
|
||
|
punpckldq mm1, mm7 ;out[2,0],[2,1],[2,2],[2,3],[2,4],[2,5],[2,6],[2,7]
|
||
|
|
||
|
mov ebx, [eax]
|
||
|
|
||
|
add ebx, output_col
|
||
|
punpckhdq mm3, mm7 ;out[3,0],[3,1],[3,2],[3,3],[3,4],[3,5],[3,6],[3,7]
|
||
|
movq [ecx], mm1
|
||
|
|
||
|
movq [ebx], mm3
|
||
|
|
||
|
emms
|
||
|
}
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
#endif /* DCT_IFAST_SUPPORTED */
|