930557be10
Add iwalsh_neon.c - vp8_short_inv_walsh4x4_neon Change-Id: I8beda6ce11ad8ce9e80cc0a38d40161938359162 Signed-off-by: James Yu <james.yu@linaro.org>
103 lines
3.5 KiB
C
103 lines
3.5 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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void vp8_short_inv_walsh4x4_neon(
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int16_t *input,
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int16_t *mb_dqcoeff) {
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int16x8_t q0s16, q1s16, q2s16, q3s16;
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int16x4_t d4s16, d5s16, d6s16, d7s16;
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int16x4x2_t v2tmp0, v2tmp1;
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int32x2x2_t v2tmp2, v2tmp3;
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int16x8_t qAdd3;
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q0s16 = vld1q_s16(input);
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q1s16 = vld1q_s16(input + 8);
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// 1st for loop
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d4s16 = vadd_s16(vget_low_s16(q0s16), vget_high_s16(q1s16));
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d6s16 = vadd_s16(vget_high_s16(q0s16), vget_low_s16(q1s16));
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d5s16 = vsub_s16(vget_low_s16(q0s16), vget_high_s16(q1s16));
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d7s16 = vsub_s16(vget_high_s16(q0s16), vget_low_s16(q1s16));
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q2s16 = vcombine_s16(d4s16, d5s16);
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q3s16 = vcombine_s16(d6s16, d7s16);
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q0s16 = vaddq_s16(q2s16, q3s16);
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q1s16 = vsubq_s16(q2s16, q3s16);
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v2tmp2 = vtrn_s32(vreinterpret_s32_s16(vget_low_s16(q0s16)),
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vreinterpret_s32_s16(vget_low_s16(q1s16)));
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v2tmp3 = vtrn_s32(vreinterpret_s32_s16(vget_high_s16(q0s16)),
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vreinterpret_s32_s16(vget_high_s16(q1s16)));
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v2tmp0 = vtrn_s16(vreinterpret_s16_s32(v2tmp2.val[0]),
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vreinterpret_s16_s32(v2tmp3.val[0]));
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v2tmp1 = vtrn_s16(vreinterpret_s16_s32(v2tmp2.val[1]),
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vreinterpret_s16_s32(v2tmp3.val[1]));
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// 2nd for loop
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d4s16 = vadd_s16(v2tmp0.val[0], v2tmp1.val[1]);
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d6s16 = vadd_s16(v2tmp0.val[1], v2tmp1.val[0]);
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d5s16 = vsub_s16(v2tmp0.val[0], v2tmp1.val[1]);
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d7s16 = vsub_s16(v2tmp0.val[1], v2tmp1.val[0]);
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q2s16 = vcombine_s16(d4s16, d5s16);
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q3s16 = vcombine_s16(d6s16, d7s16);
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qAdd3 = vdupq_n_s16(3);
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q0s16 = vaddq_s16(q2s16, q3s16);
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q1s16 = vsubq_s16(q2s16, q3s16);
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q0s16 = vaddq_s16(q0s16, qAdd3);
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q1s16 = vaddq_s16(q1s16, qAdd3);
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q0s16 = vshrq_n_s16(q0s16, 3);
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q1s16 = vshrq_n_s16(q1s16, 3);
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// store
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vst1_lane_s16(mb_dqcoeff, vget_low_s16(q0s16), 0);
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mb_dqcoeff += 16;
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vst1_lane_s16(mb_dqcoeff, vget_high_s16(q0s16), 0);
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mb_dqcoeff += 16;
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vst1_lane_s16(mb_dqcoeff, vget_low_s16(q1s16), 0);
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mb_dqcoeff += 16;
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vst1_lane_s16(mb_dqcoeff, vget_high_s16(q1s16), 0);
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mb_dqcoeff += 16;
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vst1_lane_s16(mb_dqcoeff, vget_low_s16(q0s16), 1);
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mb_dqcoeff += 16;
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vst1_lane_s16(mb_dqcoeff, vget_high_s16(q0s16), 1);
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mb_dqcoeff += 16;
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vst1_lane_s16(mb_dqcoeff, vget_low_s16(q1s16), 1);
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mb_dqcoeff += 16;
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vst1_lane_s16(mb_dqcoeff, vget_high_s16(q1s16), 1);
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mb_dqcoeff += 16;
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vst1_lane_s16(mb_dqcoeff, vget_low_s16(q0s16), 2);
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mb_dqcoeff += 16;
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vst1_lane_s16(mb_dqcoeff, vget_high_s16(q0s16), 2);
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mb_dqcoeff += 16;
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vst1_lane_s16(mb_dqcoeff, vget_low_s16(q1s16), 2);
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mb_dqcoeff += 16;
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vst1_lane_s16(mb_dqcoeff, vget_high_s16(q1s16), 2);
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mb_dqcoeff += 16;
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vst1_lane_s16(mb_dqcoeff, vget_low_s16(q0s16), 3);
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mb_dqcoeff += 16;
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vst1_lane_s16(mb_dqcoeff, vget_high_s16(q0s16), 3);
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mb_dqcoeff += 16;
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vst1_lane_s16(mb_dqcoeff, vget_low_s16(q1s16), 3);
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mb_dqcoeff += 16;
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vst1_lane_s16(mb_dqcoeff, vget_high_s16(q1s16), 3);
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mb_dqcoeff += 16;
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return;
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}
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