74e6ea45e3
The GNU builtin function __builtin_clzl() accepts an unsigned long argument, which is 8 bytes wide on LP64 systems (most Un*x systems, including Mac) but 4 bytes wide on LLP64 systems (Windows.) This caused the Neon intrinsics implementation of Huffman encoding to produce mathematically incorrect results when compiled using Visual Studio with Clang. This commit changes all invocations of __builtin_clzl() in the Neon SIMD extensions to __builtin_clzll(), which accepts an unsigned long long argument that is guaranteed to be 8 bytes wide on all systems. Fixes #480 Closes #490
592 lines
24 KiB
C
592 lines
24 KiB
C
/*
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* jcphuff-neon.c - prepare data for progressive Huffman encoding (Arm Neon)
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*
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* Copyright (C) 2020-2021, Arm Limited. All Rights Reserved.
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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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 "../../jsimd.h"
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#include "../../jdct.h"
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#include "../../jsimddct.h"
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#include "../jsimd.h"
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#include "neon-compat.h"
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#include <arm_neon.h>
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/* Data preparation for encode_mcu_AC_first().
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*
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* The equivalent scalar C function (encode_mcu_AC_first_prepare()) can be
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* found in jcphuff.c.
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*/
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void jsimd_encode_mcu_AC_first_prepare_neon
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(const JCOEF *block, const int *jpeg_natural_order_start, int Sl, int Al,
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JCOEF *values, size_t *zerobits)
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{
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JCOEF *values_ptr = values;
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JCOEF *diff_values_ptr = values + DCTSIZE2;
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/* Rows of coefficients to zero (since they haven't been processed) */
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int i, rows_to_zero = 8;
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for (i = 0; i < Sl / 16; i++) {
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int16x8_t coefs1 = vld1q_dup_s16(block + jpeg_natural_order_start[0]);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[1], coefs1, 1);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[2], coefs1, 2);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[3], coefs1, 3);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[4], coefs1, 4);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[5], coefs1, 5);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[6], coefs1, 6);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[7], coefs1, 7);
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int16x8_t coefs2 = vld1q_dup_s16(block + jpeg_natural_order_start[8]);
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[9], coefs2, 1);
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[10], coefs2, 2);
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[11], coefs2, 3);
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[12], coefs2, 4);
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[13], coefs2, 5);
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[14], coefs2, 6);
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[15], coefs2, 7);
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/* Isolate sign of coefficients. */
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int16x8_t sign_coefs1 = vshrq_n_s16(coefs1, 15);
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int16x8_t sign_coefs2 = vshrq_n_s16(coefs2, 15);
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/* Compute absolute value of coefficients and apply point transform Al. */
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int16x8_t abs_coefs1 = vabsq_s16(coefs1);
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int16x8_t abs_coefs2 = vabsq_s16(coefs2);
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coefs1 = vshlq_s16(abs_coefs1, vdupq_n_s16(-Al));
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coefs2 = vshlq_s16(abs_coefs2, vdupq_n_s16(-Al));
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/* Compute diff values. */
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int16x8_t diff1 = veorq_s16(coefs1, sign_coefs1);
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int16x8_t diff2 = veorq_s16(coefs2, sign_coefs2);
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/* Store transformed coefficients and diff values. */
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vst1q_s16(values_ptr, coefs1);
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vst1q_s16(values_ptr + DCTSIZE, coefs2);
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vst1q_s16(diff_values_ptr, diff1);
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vst1q_s16(diff_values_ptr + DCTSIZE, diff2);
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values_ptr += 16;
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diff_values_ptr += 16;
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jpeg_natural_order_start += 16;
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rows_to_zero -= 2;
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}
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/* Same operation but for remaining partial vector */
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int remaining_coefs = Sl % 16;
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if (remaining_coefs > 8) {
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int16x8_t coefs1 = vld1q_dup_s16(block + jpeg_natural_order_start[0]);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[1], coefs1, 1);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[2], coefs1, 2);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[3], coefs1, 3);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[4], coefs1, 4);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[5], coefs1, 5);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[6], coefs1, 6);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[7], coefs1, 7);
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int16x8_t coefs2 = vdupq_n_s16(0);
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switch (remaining_coefs) {
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case 15:
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[14], coefs2, 6);
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case 14:
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[13], coefs2, 5);
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case 13:
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[12], coefs2, 4);
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case 12:
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[11], coefs2, 3);
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case 11:
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[10], coefs2, 2);
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case 10:
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[9], coefs2, 1);
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case 9:
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[8], coefs2, 0);
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default:
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break;
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}
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/* Isolate sign of coefficients. */
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int16x8_t sign_coefs1 = vshrq_n_s16(coefs1, 15);
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int16x8_t sign_coefs2 = vshrq_n_s16(coefs2, 15);
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/* Compute absolute value of coefficients and apply point transform Al. */
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int16x8_t abs_coefs1 = vabsq_s16(coefs1);
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int16x8_t abs_coefs2 = vabsq_s16(coefs2);
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coefs1 = vshlq_s16(abs_coefs1, vdupq_n_s16(-Al));
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coefs2 = vshlq_s16(abs_coefs2, vdupq_n_s16(-Al));
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/* Compute diff values. */
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int16x8_t diff1 = veorq_s16(coefs1, sign_coefs1);
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int16x8_t diff2 = veorq_s16(coefs2, sign_coefs2);
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/* Store transformed coefficients and diff values. */
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vst1q_s16(values_ptr, coefs1);
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vst1q_s16(values_ptr + DCTSIZE, coefs2);
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vst1q_s16(diff_values_ptr, diff1);
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vst1q_s16(diff_values_ptr + DCTSIZE, diff2);
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values_ptr += 16;
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diff_values_ptr += 16;
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rows_to_zero -= 2;
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} else if (remaining_coefs > 0) {
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int16x8_t coefs = vdupq_n_s16(0);
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switch (remaining_coefs) {
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case 8:
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coefs = vld1q_lane_s16(block + jpeg_natural_order_start[7], coefs, 7);
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case 7:
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coefs = vld1q_lane_s16(block + jpeg_natural_order_start[6], coefs, 6);
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case 6:
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coefs = vld1q_lane_s16(block + jpeg_natural_order_start[5], coefs, 5);
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case 5:
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coefs = vld1q_lane_s16(block + jpeg_natural_order_start[4], coefs, 4);
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case 4:
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coefs = vld1q_lane_s16(block + jpeg_natural_order_start[3], coefs, 3);
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case 3:
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coefs = vld1q_lane_s16(block + jpeg_natural_order_start[2], coefs, 2);
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case 2:
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coefs = vld1q_lane_s16(block + jpeg_natural_order_start[1], coefs, 1);
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case 1:
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coefs = vld1q_lane_s16(block + jpeg_natural_order_start[0], coefs, 0);
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default:
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break;
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}
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/* Isolate sign of coefficients. */
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int16x8_t sign_coefs = vshrq_n_s16(coefs, 15);
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/* Compute absolute value of coefficients and apply point transform Al. */
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int16x8_t abs_coefs = vabsq_s16(coefs);
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coefs = vshlq_s16(abs_coefs, vdupq_n_s16(-Al));
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/* Compute diff values. */
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int16x8_t diff = veorq_s16(coefs, sign_coefs);
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/* Store transformed coefficients and diff values. */
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vst1q_s16(values_ptr, coefs);
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vst1q_s16(diff_values_ptr, diff);
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values_ptr += 8;
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diff_values_ptr += 8;
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rows_to_zero--;
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}
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/* Zero remaining memory in the values and diff_values blocks. */
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for (i = 0; i < rows_to_zero; i++) {
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vst1q_s16(values_ptr, vdupq_n_s16(0));
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vst1q_s16(diff_values_ptr, vdupq_n_s16(0));
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values_ptr += 8;
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diff_values_ptr += 8;
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}
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/* Construct zerobits bitmap. A set bit means that the corresponding
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* coefficient != 0.
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*/
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int16x8_t row0 = vld1q_s16(values + 0 * DCTSIZE);
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int16x8_t row1 = vld1q_s16(values + 1 * DCTSIZE);
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int16x8_t row2 = vld1q_s16(values + 2 * DCTSIZE);
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int16x8_t row3 = vld1q_s16(values + 3 * DCTSIZE);
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int16x8_t row4 = vld1q_s16(values + 4 * DCTSIZE);
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int16x8_t row5 = vld1q_s16(values + 5 * DCTSIZE);
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int16x8_t row6 = vld1q_s16(values + 6 * DCTSIZE);
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int16x8_t row7 = vld1q_s16(values + 7 * DCTSIZE);
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uint8x8_t row0_eq0 = vmovn_u16(vceqq_s16(row0, vdupq_n_s16(0)));
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uint8x8_t row1_eq0 = vmovn_u16(vceqq_s16(row1, vdupq_n_s16(0)));
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uint8x8_t row2_eq0 = vmovn_u16(vceqq_s16(row2, vdupq_n_s16(0)));
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uint8x8_t row3_eq0 = vmovn_u16(vceqq_s16(row3, vdupq_n_s16(0)));
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uint8x8_t row4_eq0 = vmovn_u16(vceqq_s16(row4, vdupq_n_s16(0)));
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uint8x8_t row5_eq0 = vmovn_u16(vceqq_s16(row5, vdupq_n_s16(0)));
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uint8x8_t row6_eq0 = vmovn_u16(vceqq_s16(row6, vdupq_n_s16(0)));
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uint8x8_t row7_eq0 = vmovn_u16(vceqq_s16(row7, vdupq_n_s16(0)));
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/* { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 } */
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const uint8x8_t bitmap_mask =
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vreinterpret_u8_u64(vmov_n_u64(0x8040201008040201));
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row0_eq0 = vand_u8(row0_eq0, bitmap_mask);
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row1_eq0 = vand_u8(row1_eq0, bitmap_mask);
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row2_eq0 = vand_u8(row2_eq0, bitmap_mask);
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row3_eq0 = vand_u8(row3_eq0, bitmap_mask);
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row4_eq0 = vand_u8(row4_eq0, bitmap_mask);
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row5_eq0 = vand_u8(row5_eq0, bitmap_mask);
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row6_eq0 = vand_u8(row6_eq0, bitmap_mask);
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row7_eq0 = vand_u8(row7_eq0, bitmap_mask);
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uint8x8_t bitmap_rows_01 = vpadd_u8(row0_eq0, row1_eq0);
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uint8x8_t bitmap_rows_23 = vpadd_u8(row2_eq0, row3_eq0);
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uint8x8_t bitmap_rows_45 = vpadd_u8(row4_eq0, row5_eq0);
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uint8x8_t bitmap_rows_67 = vpadd_u8(row6_eq0, row7_eq0);
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uint8x8_t bitmap_rows_0123 = vpadd_u8(bitmap_rows_01, bitmap_rows_23);
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uint8x8_t bitmap_rows_4567 = vpadd_u8(bitmap_rows_45, bitmap_rows_67);
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uint8x8_t bitmap_all = vpadd_u8(bitmap_rows_0123, bitmap_rows_4567);
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#if defined(__aarch64__) || defined(_M_ARM64)
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/* Move bitmap to a 64-bit scalar register. */
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uint64_t bitmap = vget_lane_u64(vreinterpret_u64_u8(bitmap_all), 0);
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/* Store zerobits bitmap. */
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*zerobits = ~bitmap;
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#else
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/* Move bitmap to two 32-bit scalar registers. */
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uint32_t bitmap0 = vget_lane_u32(vreinterpret_u32_u8(bitmap_all), 0);
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uint32_t bitmap1 = vget_lane_u32(vreinterpret_u32_u8(bitmap_all), 1);
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/* Store zerobits bitmap. */
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zerobits[0] = ~bitmap0;
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zerobits[1] = ~bitmap1;
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#endif
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}
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/* Data preparation for encode_mcu_AC_refine().
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*
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* The equivalent scalar C function (encode_mcu_AC_refine_prepare()) can be
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* found in jcphuff.c.
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*/
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int jsimd_encode_mcu_AC_refine_prepare_neon
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(const JCOEF *block, const int *jpeg_natural_order_start, int Sl, int Al,
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JCOEF *absvalues, size_t *bits)
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{
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/* Temporary storage buffers for data used to compute the signbits bitmap and
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* the end-of-block (EOB) position
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*/
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uint8_t coef_sign_bits[64];
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uint8_t coef_eq1_bits[64];
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JCOEF *absvalues_ptr = absvalues;
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uint8_t *coef_sign_bits_ptr = coef_sign_bits;
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uint8_t *eq1_bits_ptr = coef_eq1_bits;
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/* Rows of coefficients to zero (since they haven't been processed) */
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int i, rows_to_zero = 8;
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for (i = 0; i < Sl / 16; i++) {
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int16x8_t coefs1 = vld1q_dup_s16(block + jpeg_natural_order_start[0]);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[1], coefs1, 1);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[2], coefs1, 2);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[3], coefs1, 3);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[4], coefs1, 4);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[5], coefs1, 5);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[6], coefs1, 6);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[7], coefs1, 7);
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int16x8_t coefs2 = vld1q_dup_s16(block + jpeg_natural_order_start[8]);
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[9], coefs2, 1);
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[10], coefs2, 2);
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[11], coefs2, 3);
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[12], coefs2, 4);
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[13], coefs2, 5);
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[14], coefs2, 6);
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coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[15], coefs2, 7);
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/* Compute and store data for signbits bitmap. */
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uint8x8_t sign_coefs1 =
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vmovn_u16(vreinterpretq_u16_s16(vshrq_n_s16(coefs1, 15)));
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uint8x8_t sign_coefs2 =
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vmovn_u16(vreinterpretq_u16_s16(vshrq_n_s16(coefs2, 15)));
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vst1_u8(coef_sign_bits_ptr, sign_coefs1);
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vst1_u8(coef_sign_bits_ptr + DCTSIZE, sign_coefs2);
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/* Compute absolute value of coefficients and apply point transform Al. */
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int16x8_t abs_coefs1 = vabsq_s16(coefs1);
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int16x8_t abs_coefs2 = vabsq_s16(coefs2);
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coefs1 = vshlq_s16(abs_coefs1, vdupq_n_s16(-Al));
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coefs2 = vshlq_s16(abs_coefs2, vdupq_n_s16(-Al));
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vst1q_s16(absvalues_ptr, coefs1);
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vst1q_s16(absvalues_ptr + DCTSIZE, coefs2);
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/* Test whether transformed coefficient values == 1 (used to find EOB
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* position.)
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*/
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uint8x8_t coefs_eq11 = vmovn_u16(vceqq_s16(coefs1, vdupq_n_s16(1)));
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uint8x8_t coefs_eq12 = vmovn_u16(vceqq_s16(coefs2, vdupq_n_s16(1)));
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vst1_u8(eq1_bits_ptr, coefs_eq11);
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vst1_u8(eq1_bits_ptr + DCTSIZE, coefs_eq12);
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absvalues_ptr += 16;
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coef_sign_bits_ptr += 16;
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eq1_bits_ptr += 16;
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jpeg_natural_order_start += 16;
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rows_to_zero -= 2;
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}
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/* Same operation but for remaining partial vector */
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int remaining_coefs = Sl % 16;
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if (remaining_coefs > 8) {
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int16x8_t coefs1 = vld1q_dup_s16(block + jpeg_natural_order_start[0]);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[1], coefs1, 1);
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coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[2], coefs1, 2);
|
|
coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[3], coefs1, 3);
|
|
coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[4], coefs1, 4);
|
|
coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[5], coefs1, 5);
|
|
coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[6], coefs1, 6);
|
|
coefs1 = vld1q_lane_s16(block + jpeg_natural_order_start[7], coefs1, 7);
|
|
int16x8_t coefs2 = vdupq_n_s16(0);
|
|
switch (remaining_coefs) {
|
|
case 15:
|
|
coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[14], coefs2, 6);
|
|
case 14:
|
|
coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[13], coefs2, 5);
|
|
case 13:
|
|
coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[12], coefs2, 4);
|
|
case 12:
|
|
coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[11], coefs2, 3);
|
|
case 11:
|
|
coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[10], coefs2, 2);
|
|
case 10:
|
|
coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[9], coefs2, 1);
|
|
case 9:
|
|
coefs2 = vld1q_lane_s16(block + jpeg_natural_order_start[8], coefs2, 0);
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* Compute and store data for signbits bitmap. */
|
|
uint8x8_t sign_coefs1 =
|
|
vmovn_u16(vreinterpretq_u16_s16(vshrq_n_s16(coefs1, 15)));
|
|
uint8x8_t sign_coefs2 =
|
|
vmovn_u16(vreinterpretq_u16_s16(vshrq_n_s16(coefs2, 15)));
|
|
vst1_u8(coef_sign_bits_ptr, sign_coefs1);
|
|
vst1_u8(coef_sign_bits_ptr + DCTSIZE, sign_coefs2);
|
|
|
|
/* Compute absolute value of coefficients and apply point transform Al. */
|
|
int16x8_t abs_coefs1 = vabsq_s16(coefs1);
|
|
int16x8_t abs_coefs2 = vabsq_s16(coefs2);
|
|
coefs1 = vshlq_s16(abs_coefs1, vdupq_n_s16(-Al));
|
|
coefs2 = vshlq_s16(abs_coefs2, vdupq_n_s16(-Al));
|
|
vst1q_s16(absvalues_ptr, coefs1);
|
|
vst1q_s16(absvalues_ptr + DCTSIZE, coefs2);
|
|
|
|
/* Test whether transformed coefficient values == 1 (used to find EOB
|
|
* position.)
|
|
*/
|
|
uint8x8_t coefs_eq11 = vmovn_u16(vceqq_s16(coefs1, vdupq_n_s16(1)));
|
|
uint8x8_t coefs_eq12 = vmovn_u16(vceqq_s16(coefs2, vdupq_n_s16(1)));
|
|
vst1_u8(eq1_bits_ptr, coefs_eq11);
|
|
vst1_u8(eq1_bits_ptr + DCTSIZE, coefs_eq12);
|
|
|
|
absvalues_ptr += 16;
|
|
coef_sign_bits_ptr += 16;
|
|
eq1_bits_ptr += 16;
|
|
jpeg_natural_order_start += 16;
|
|
rows_to_zero -= 2;
|
|
|
|
} else if (remaining_coefs > 0) {
|
|
int16x8_t coefs = vdupq_n_s16(0);
|
|
|
|
switch (remaining_coefs) {
|
|
case 8:
|
|
coefs = vld1q_lane_s16(block + jpeg_natural_order_start[7], coefs, 7);
|
|
case 7:
|
|
coefs = vld1q_lane_s16(block + jpeg_natural_order_start[6], coefs, 6);
|
|
case 6:
|
|
coefs = vld1q_lane_s16(block + jpeg_natural_order_start[5], coefs, 5);
|
|
case 5:
|
|
coefs = vld1q_lane_s16(block + jpeg_natural_order_start[4], coefs, 4);
|
|
case 4:
|
|
coefs = vld1q_lane_s16(block + jpeg_natural_order_start[3], coefs, 3);
|
|
case 3:
|
|
coefs = vld1q_lane_s16(block + jpeg_natural_order_start[2], coefs, 2);
|
|
case 2:
|
|
coefs = vld1q_lane_s16(block + jpeg_natural_order_start[1], coefs, 1);
|
|
case 1:
|
|
coefs = vld1q_lane_s16(block + jpeg_natural_order_start[0], coefs, 0);
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* Compute and store data for signbits bitmap. */
|
|
uint8x8_t sign_coefs =
|
|
vmovn_u16(vreinterpretq_u16_s16(vshrq_n_s16(coefs, 15)));
|
|
vst1_u8(coef_sign_bits_ptr, sign_coefs);
|
|
|
|
/* Compute absolute value of coefficients and apply point transform Al. */
|
|
int16x8_t abs_coefs = vabsq_s16(coefs);
|
|
coefs = vshlq_s16(abs_coefs, vdupq_n_s16(-Al));
|
|
vst1q_s16(absvalues_ptr, coefs);
|
|
|
|
/* Test whether transformed coefficient values == 1 (used to find EOB
|
|
* position.)
|
|
*/
|
|
uint8x8_t coefs_eq1 = vmovn_u16(vceqq_s16(coefs, vdupq_n_s16(1)));
|
|
vst1_u8(eq1_bits_ptr, coefs_eq1);
|
|
|
|
absvalues_ptr += 8;
|
|
coef_sign_bits_ptr += 8;
|
|
eq1_bits_ptr += 8;
|
|
rows_to_zero--;
|
|
}
|
|
|
|
/* Zero remaining memory in blocks. */
|
|
for (i = 0; i < rows_to_zero; i++) {
|
|
vst1q_s16(absvalues_ptr, vdupq_n_s16(0));
|
|
vst1_u8(coef_sign_bits_ptr, vdup_n_u8(0));
|
|
vst1_u8(eq1_bits_ptr, vdup_n_u8(0));
|
|
absvalues_ptr += 8;
|
|
coef_sign_bits_ptr += 8;
|
|
eq1_bits_ptr += 8;
|
|
}
|
|
|
|
/* Construct zerobits bitmap. */
|
|
int16x8_t abs_row0 = vld1q_s16(absvalues + 0 * DCTSIZE);
|
|
int16x8_t abs_row1 = vld1q_s16(absvalues + 1 * DCTSIZE);
|
|
int16x8_t abs_row2 = vld1q_s16(absvalues + 2 * DCTSIZE);
|
|
int16x8_t abs_row3 = vld1q_s16(absvalues + 3 * DCTSIZE);
|
|
int16x8_t abs_row4 = vld1q_s16(absvalues + 4 * DCTSIZE);
|
|
int16x8_t abs_row5 = vld1q_s16(absvalues + 5 * DCTSIZE);
|
|
int16x8_t abs_row6 = vld1q_s16(absvalues + 6 * DCTSIZE);
|
|
int16x8_t abs_row7 = vld1q_s16(absvalues + 7 * DCTSIZE);
|
|
|
|
uint8x8_t abs_row0_eq0 = vmovn_u16(vceqq_s16(abs_row0, vdupq_n_s16(0)));
|
|
uint8x8_t abs_row1_eq0 = vmovn_u16(vceqq_s16(abs_row1, vdupq_n_s16(0)));
|
|
uint8x8_t abs_row2_eq0 = vmovn_u16(vceqq_s16(abs_row2, vdupq_n_s16(0)));
|
|
uint8x8_t abs_row3_eq0 = vmovn_u16(vceqq_s16(abs_row3, vdupq_n_s16(0)));
|
|
uint8x8_t abs_row4_eq0 = vmovn_u16(vceqq_s16(abs_row4, vdupq_n_s16(0)));
|
|
uint8x8_t abs_row5_eq0 = vmovn_u16(vceqq_s16(abs_row5, vdupq_n_s16(0)));
|
|
uint8x8_t abs_row6_eq0 = vmovn_u16(vceqq_s16(abs_row6, vdupq_n_s16(0)));
|
|
uint8x8_t abs_row7_eq0 = vmovn_u16(vceqq_s16(abs_row7, vdupq_n_s16(0)));
|
|
|
|
/* { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 } */
|
|
const uint8x8_t bitmap_mask =
|
|
vreinterpret_u8_u64(vmov_n_u64(0x8040201008040201));
|
|
|
|
abs_row0_eq0 = vand_u8(abs_row0_eq0, bitmap_mask);
|
|
abs_row1_eq0 = vand_u8(abs_row1_eq0, bitmap_mask);
|
|
abs_row2_eq0 = vand_u8(abs_row2_eq0, bitmap_mask);
|
|
abs_row3_eq0 = vand_u8(abs_row3_eq0, bitmap_mask);
|
|
abs_row4_eq0 = vand_u8(abs_row4_eq0, bitmap_mask);
|
|
abs_row5_eq0 = vand_u8(abs_row5_eq0, bitmap_mask);
|
|
abs_row6_eq0 = vand_u8(abs_row6_eq0, bitmap_mask);
|
|
abs_row7_eq0 = vand_u8(abs_row7_eq0, bitmap_mask);
|
|
|
|
uint8x8_t bitmap_rows_01 = vpadd_u8(abs_row0_eq0, abs_row1_eq0);
|
|
uint8x8_t bitmap_rows_23 = vpadd_u8(abs_row2_eq0, abs_row3_eq0);
|
|
uint8x8_t bitmap_rows_45 = vpadd_u8(abs_row4_eq0, abs_row5_eq0);
|
|
uint8x8_t bitmap_rows_67 = vpadd_u8(abs_row6_eq0, abs_row7_eq0);
|
|
uint8x8_t bitmap_rows_0123 = vpadd_u8(bitmap_rows_01, bitmap_rows_23);
|
|
uint8x8_t bitmap_rows_4567 = vpadd_u8(bitmap_rows_45, bitmap_rows_67);
|
|
uint8x8_t bitmap_all = vpadd_u8(bitmap_rows_0123, bitmap_rows_4567);
|
|
|
|
#if defined(__aarch64__) || defined(_M_ARM64)
|
|
/* Move bitmap to a 64-bit scalar register. */
|
|
uint64_t bitmap = vget_lane_u64(vreinterpret_u64_u8(bitmap_all), 0);
|
|
/* Store zerobits bitmap. */
|
|
bits[0] = ~bitmap;
|
|
#else
|
|
/* Move bitmap to two 32-bit scalar registers. */
|
|
uint32_t bitmap0 = vget_lane_u32(vreinterpret_u32_u8(bitmap_all), 0);
|
|
uint32_t bitmap1 = vget_lane_u32(vreinterpret_u32_u8(bitmap_all), 1);
|
|
/* Store zerobits bitmap. */
|
|
bits[0] = ~bitmap0;
|
|
bits[1] = ~bitmap1;
|
|
#endif
|
|
|
|
/* Construct signbits bitmap. */
|
|
uint8x8_t signbits_row0 = vld1_u8(coef_sign_bits + 0 * DCTSIZE);
|
|
uint8x8_t signbits_row1 = vld1_u8(coef_sign_bits + 1 * DCTSIZE);
|
|
uint8x8_t signbits_row2 = vld1_u8(coef_sign_bits + 2 * DCTSIZE);
|
|
uint8x8_t signbits_row3 = vld1_u8(coef_sign_bits + 3 * DCTSIZE);
|
|
uint8x8_t signbits_row4 = vld1_u8(coef_sign_bits + 4 * DCTSIZE);
|
|
uint8x8_t signbits_row5 = vld1_u8(coef_sign_bits + 5 * DCTSIZE);
|
|
uint8x8_t signbits_row6 = vld1_u8(coef_sign_bits + 6 * DCTSIZE);
|
|
uint8x8_t signbits_row7 = vld1_u8(coef_sign_bits + 7 * DCTSIZE);
|
|
|
|
signbits_row0 = vand_u8(signbits_row0, bitmap_mask);
|
|
signbits_row1 = vand_u8(signbits_row1, bitmap_mask);
|
|
signbits_row2 = vand_u8(signbits_row2, bitmap_mask);
|
|
signbits_row3 = vand_u8(signbits_row3, bitmap_mask);
|
|
signbits_row4 = vand_u8(signbits_row4, bitmap_mask);
|
|
signbits_row5 = vand_u8(signbits_row5, bitmap_mask);
|
|
signbits_row6 = vand_u8(signbits_row6, bitmap_mask);
|
|
signbits_row7 = vand_u8(signbits_row7, bitmap_mask);
|
|
|
|
bitmap_rows_01 = vpadd_u8(signbits_row0, signbits_row1);
|
|
bitmap_rows_23 = vpadd_u8(signbits_row2, signbits_row3);
|
|
bitmap_rows_45 = vpadd_u8(signbits_row4, signbits_row5);
|
|
bitmap_rows_67 = vpadd_u8(signbits_row6, signbits_row7);
|
|
bitmap_rows_0123 = vpadd_u8(bitmap_rows_01, bitmap_rows_23);
|
|
bitmap_rows_4567 = vpadd_u8(bitmap_rows_45, bitmap_rows_67);
|
|
bitmap_all = vpadd_u8(bitmap_rows_0123, bitmap_rows_4567);
|
|
|
|
#if defined(__aarch64__) || defined(_M_ARM64)
|
|
/* Move bitmap to a 64-bit scalar register. */
|
|
bitmap = vget_lane_u64(vreinterpret_u64_u8(bitmap_all), 0);
|
|
/* Store signbits bitmap. */
|
|
bits[1] = ~bitmap;
|
|
#else
|
|
/* Move bitmap to two 32-bit scalar registers. */
|
|
bitmap0 = vget_lane_u32(vreinterpret_u32_u8(bitmap_all), 0);
|
|
bitmap1 = vget_lane_u32(vreinterpret_u32_u8(bitmap_all), 1);
|
|
/* Store signbits bitmap. */
|
|
bits[2] = ~bitmap0;
|
|
bits[3] = ~bitmap1;
|
|
#endif
|
|
|
|
/* Construct bitmap to find EOB position (the index of the last coefficient
|
|
* equal to 1.)
|
|
*/
|
|
uint8x8_t row0_eq1 = vld1_u8(coef_eq1_bits + 0 * DCTSIZE);
|
|
uint8x8_t row1_eq1 = vld1_u8(coef_eq1_bits + 1 * DCTSIZE);
|
|
uint8x8_t row2_eq1 = vld1_u8(coef_eq1_bits + 2 * DCTSIZE);
|
|
uint8x8_t row3_eq1 = vld1_u8(coef_eq1_bits + 3 * DCTSIZE);
|
|
uint8x8_t row4_eq1 = vld1_u8(coef_eq1_bits + 4 * DCTSIZE);
|
|
uint8x8_t row5_eq1 = vld1_u8(coef_eq1_bits + 5 * DCTSIZE);
|
|
uint8x8_t row6_eq1 = vld1_u8(coef_eq1_bits + 6 * DCTSIZE);
|
|
uint8x8_t row7_eq1 = vld1_u8(coef_eq1_bits + 7 * DCTSIZE);
|
|
|
|
row0_eq1 = vand_u8(row0_eq1, bitmap_mask);
|
|
row1_eq1 = vand_u8(row1_eq1, bitmap_mask);
|
|
row2_eq1 = vand_u8(row2_eq1, bitmap_mask);
|
|
row3_eq1 = vand_u8(row3_eq1, bitmap_mask);
|
|
row4_eq1 = vand_u8(row4_eq1, bitmap_mask);
|
|
row5_eq1 = vand_u8(row5_eq1, bitmap_mask);
|
|
row6_eq1 = vand_u8(row6_eq1, bitmap_mask);
|
|
row7_eq1 = vand_u8(row7_eq1, bitmap_mask);
|
|
|
|
bitmap_rows_01 = vpadd_u8(row0_eq1, row1_eq1);
|
|
bitmap_rows_23 = vpadd_u8(row2_eq1, row3_eq1);
|
|
bitmap_rows_45 = vpadd_u8(row4_eq1, row5_eq1);
|
|
bitmap_rows_67 = vpadd_u8(row6_eq1, row7_eq1);
|
|
bitmap_rows_0123 = vpadd_u8(bitmap_rows_01, bitmap_rows_23);
|
|
bitmap_rows_4567 = vpadd_u8(bitmap_rows_45, bitmap_rows_67);
|
|
bitmap_all = vpadd_u8(bitmap_rows_0123, bitmap_rows_4567);
|
|
|
|
#if defined(__aarch64__) || defined(_M_ARM64)
|
|
/* Move bitmap to a 64-bit scalar register. */
|
|
bitmap = vget_lane_u64(vreinterpret_u64_u8(bitmap_all), 0);
|
|
|
|
/* Return EOB position. */
|
|
if (bitmap == 0) {
|
|
/* EOB position is defined to be 0 if all coefficients != 1. */
|
|
return 0;
|
|
} else {
|
|
return 63 - BUILTIN_CLZLL(bitmap);
|
|
}
|
|
#else
|
|
/* Move bitmap to two 32-bit scalar registers. */
|
|
bitmap0 = vget_lane_u32(vreinterpret_u32_u8(bitmap_all), 0);
|
|
bitmap1 = vget_lane_u32(vreinterpret_u32_u8(bitmap_all), 1);
|
|
|
|
/* Return EOB position. */
|
|
if (bitmap0 == 0 && bitmap1 == 0) {
|
|
return 0;
|
|
} else if (bitmap1 != 0) {
|
|
return 63 - BUILTIN_CLZ(bitmap1);
|
|
} else {
|
|
return 31 - BUILTIN_CLZ(bitmap0);
|
|
}
|
|
#endif
|
|
}
|