143 lines
4.5 KiB
C
143 lines
4.5 KiB
C
/*
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* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <arm_neon.h>
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static const int16_t cospi8sqrt2minus1 = 20091;
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static const int16_t sinpi8sqrt2 = 35468;
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void vp8_dequant_idct_add_neon(
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int16_t *input,
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int16_t *dq,
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unsigned char *dst,
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int stride) {
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unsigned char *dst0;
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int32x2_t d14, d15;
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int16x4_t d2, d3, d4, d5, d10, d11, d12, d13;
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int16x8_t q1, q2, q3, q4, q5, q6;
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int16x8_t qEmpty = vdupq_n_s16(0);
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int32x2x2_t d2tmp0, d2tmp1;
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int16x4x2_t d2tmp2, d2tmp3;
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d14 = d15 = vdup_n_s32(0);
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// load input
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q3 = vld1q_s16(input);
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vst1q_s16(input, qEmpty);
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input += 8;
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q4 = vld1q_s16(input);
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vst1q_s16(input, qEmpty);
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// load dq
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q5 = vld1q_s16(dq);
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dq += 8;
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q6 = vld1q_s16(dq);
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// load src from dst
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dst0 = dst;
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d14 = vld1_lane_s32((const int32_t *)dst0, d14, 0);
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dst0 += stride;
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d14 = vld1_lane_s32((const int32_t *)dst0, d14, 1);
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dst0 += stride;
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d15 = vld1_lane_s32((const int32_t *)dst0, d15, 0);
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dst0 += stride;
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d15 = vld1_lane_s32((const int32_t *)dst0, d15, 1);
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q1 = vreinterpretq_s16_u16(vmulq_u16(vreinterpretq_u16_s16(q3),
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vreinterpretq_u16_s16(q5)));
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q2 = vreinterpretq_s16_u16(vmulq_u16(vreinterpretq_u16_s16(q4),
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vreinterpretq_u16_s16(q6)));
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d12 = vqadd_s16(vget_low_s16(q1), vget_low_s16(q2));
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d13 = vqsub_s16(vget_low_s16(q1), vget_low_s16(q2));
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q2 = vcombine_s16(vget_high_s16(q1), vget_high_s16(q2));
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q3 = vqdmulhq_n_s16(q2, sinpi8sqrt2);
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q4 = vqdmulhq_n_s16(q2, cospi8sqrt2minus1);
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q3 = vshrq_n_s16(q3, 1);
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q4 = vshrq_n_s16(q4, 1);
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q3 = vqaddq_s16(q3, q2);
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q4 = vqaddq_s16(q4, q2);
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d10 = vqsub_s16(vget_low_s16(q3), vget_high_s16(q4));
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d11 = vqadd_s16(vget_high_s16(q3), vget_low_s16(q4));
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d2 = vqadd_s16(d12, d11);
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d3 = vqadd_s16(d13, d10);
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d4 = vqsub_s16(d13, d10);
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d5 = vqsub_s16(d12, d11);
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d2tmp0 = vtrn_s32(vreinterpret_s32_s16(d2), vreinterpret_s32_s16(d4));
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d2tmp1 = vtrn_s32(vreinterpret_s32_s16(d3), vreinterpret_s32_s16(d5));
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d2tmp2 = vtrn_s16(vreinterpret_s16_s32(d2tmp0.val[0]),
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vreinterpret_s16_s32(d2tmp1.val[0]));
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d2tmp3 = vtrn_s16(vreinterpret_s16_s32(d2tmp0.val[1]),
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vreinterpret_s16_s32(d2tmp1.val[1]));
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// loop 2
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q2 = vcombine_s16(d2tmp2.val[1], d2tmp3.val[1]);
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q3 = vqdmulhq_n_s16(q2, sinpi8sqrt2);
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q4 = vqdmulhq_n_s16(q2, cospi8sqrt2minus1);
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d12 = vqadd_s16(d2tmp2.val[0], d2tmp3.val[0]);
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d13 = vqsub_s16(d2tmp2.val[0], d2tmp3.val[0]);
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q3 = vshrq_n_s16(q3, 1);
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q4 = vshrq_n_s16(q4, 1);
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q3 = vqaddq_s16(q3, q2);
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q4 = vqaddq_s16(q4, q2);
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d10 = vqsub_s16(vget_low_s16(q3), vget_high_s16(q4));
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d11 = vqadd_s16(vget_high_s16(q3), vget_low_s16(q4));
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d2 = vqadd_s16(d12, d11);
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d3 = vqadd_s16(d13, d10);
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d4 = vqsub_s16(d13, d10);
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d5 = vqsub_s16(d12, d11);
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d2 = vrshr_n_s16(d2, 3);
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d3 = vrshr_n_s16(d3, 3);
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d4 = vrshr_n_s16(d4, 3);
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d5 = vrshr_n_s16(d5, 3);
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d2tmp0 = vtrn_s32(vreinterpret_s32_s16(d2), vreinterpret_s32_s16(d4));
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d2tmp1 = vtrn_s32(vreinterpret_s32_s16(d3), vreinterpret_s32_s16(d5));
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d2tmp2 = vtrn_s16(vreinterpret_s16_s32(d2tmp0.val[0]),
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vreinterpret_s16_s32(d2tmp1.val[0]));
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d2tmp3 = vtrn_s16(vreinterpret_s16_s32(d2tmp0.val[1]),
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vreinterpret_s16_s32(d2tmp1.val[1]));
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q1 = vcombine_s16(d2tmp2.val[0], d2tmp2.val[1]);
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q2 = vcombine_s16(d2tmp3.val[0], d2tmp3.val[1]);
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q1 = vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(q1),
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vreinterpret_u8_s32(d14)));
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q2 = vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(q2),
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vreinterpret_u8_s32(d15)));
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d14 = vreinterpret_s32_u8(vqmovun_s16(q1));
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d15 = vreinterpret_s32_u8(vqmovun_s16(q2));
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dst0 = dst;
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vst1_lane_s32((int32_t *)dst0, d14, 0);
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dst0 += stride;
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vst1_lane_s32((int32_t *)dst0, d14, 1);
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dst0 += stride;
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vst1_lane_s32((int32_t *)dst0, d15, 0);
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dst0 += stride;
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vst1_lane_s32((int32_t *)dst0, d15, 1);
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return;
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}
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