63 lines
2.0 KiB
C
63 lines
2.0 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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void idct_dequant_0_2x_neon(
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int16_t *q,
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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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int i, a0, a1;
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int16x8x2_t q2Add;
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int32x2_t d2s32, d4s32;
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uint8x8_t d2u8, d4u8;
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uint16x8_t q1u16, q2u16;
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a0 = ((q[0] * dq) + 4) >> 3;
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a1 = ((q[16] * dq) + 4) >> 3;
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q[0] = q[16] = 0;
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q2Add.val[0] = vdupq_n_s16((int16_t)a0);
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q2Add.val[1] = vdupq_n_s16((int16_t)a1);
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for (i = 0; i < 2; i++, dst += 4) {
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dst0 = dst;
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d2s32 = vld1_lane_s32((const int32_t *)dst0, d2s32, 0);
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dst0 += stride;
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d2s32 = vld1_lane_s32((const int32_t *)dst0, d2s32, 1);
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dst0 += stride;
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d4s32 = vld1_lane_s32((const int32_t *)dst0, d4s32, 0);
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dst0 += stride;
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d4s32 = vld1_lane_s32((const int32_t *)dst0, d4s32, 1);
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q1u16 = vaddw_u8(vreinterpretq_u16_s16(q2Add.val[i]),
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vreinterpret_u8_s32(d2s32));
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q2u16 = vaddw_u8(vreinterpretq_u16_s16(q2Add.val[i]),
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vreinterpret_u8_s32(d4s32));
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d2u8 = vqmovun_s16(vreinterpretq_s16_u16(q1u16));
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d4u8 = vqmovun_s16(vreinterpretq_s16_u16(q2u16));
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d2s32 = vreinterpret_s32_u8(d2u8);
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d4s32 = vreinterpret_s32_u8(d4u8);
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dst0 = dst;
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vst1_lane_s32((int32_t *)dst0, d2s32, 0);
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dst0 += stride;
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vst1_lane_s32((int32_t *)dst0, d2s32, 1);
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dst0 += stride;
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vst1_lane_s32((int32_t *)dst0, d4s32, 0);
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dst0 += stride;
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vst1_lane_s32((int32_t *)dst0, d4s32, 1);
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}
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return;
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}
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