ref: 9d85ce8e0cc588629650690a5fa0ed559ed77d30
dir: /vp8/common/arm/neon/iwalsh_neon.c/
/* * Copyright (c) 2014 The WebM project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */ #include <arm_neon.h> void vp8_short_inv_walsh4x4_neon( int16_t *input, int16_t *mb_dqcoeff) { int16x8_t q0s16, q1s16, q2s16, q3s16; int16x4_t d4s16, d5s16, d6s16, d7s16; int16x4x2_t v2tmp0, v2tmp1; int32x2x2_t v2tmp2, v2tmp3; int16x8_t qAdd3; q0s16 = vld1q_s16(input); q1s16 = vld1q_s16(input + 8); // 1st for loop d4s16 = vadd_s16(vget_low_s16(q0s16), vget_high_s16(q1s16)); d6s16 = vadd_s16(vget_high_s16(q0s16), vget_low_s16(q1s16)); d5s16 = vsub_s16(vget_low_s16(q0s16), vget_high_s16(q1s16)); d7s16 = vsub_s16(vget_high_s16(q0s16), vget_low_s16(q1s16)); q2s16 = vcombine_s16(d4s16, d5s16); q3s16 = vcombine_s16(d6s16, d7s16); q0s16 = vaddq_s16(q2s16, q3s16); q1s16 = vsubq_s16(q2s16, q3s16); v2tmp2 = vtrn_s32(vreinterpret_s32_s16(vget_low_s16(q0s16)), vreinterpret_s32_s16(vget_low_s16(q1s16))); v2tmp3 = vtrn_s32(vreinterpret_s32_s16(vget_high_s16(q0s16)), vreinterpret_s32_s16(vget_high_s16(q1s16))); v2tmp0 = vtrn_s16(vreinterpret_s16_s32(v2tmp2.val[0]), vreinterpret_s16_s32(v2tmp3.val[0])); v2tmp1 = vtrn_s16(vreinterpret_s16_s32(v2tmp2.val[1]), vreinterpret_s16_s32(v2tmp3.val[1])); // 2nd for loop d4s16 = vadd_s16(v2tmp0.val[0], v2tmp1.val[1]); d6s16 = vadd_s16(v2tmp0.val[1], v2tmp1.val[0]); d5s16 = vsub_s16(v2tmp0.val[0], v2tmp1.val[1]); d7s16 = vsub_s16(v2tmp0.val[1], v2tmp1.val[0]); q2s16 = vcombine_s16(d4s16, d5s16); q3s16 = vcombine_s16(d6s16, d7s16); qAdd3 = vdupq_n_s16(3); q0s16 = vaddq_s16(q2s16, q3s16); q1s16 = vsubq_s16(q2s16, q3s16); q0s16 = vaddq_s16(q0s16, qAdd3); q1s16 = vaddq_s16(q1s16, qAdd3); q0s16 = vshrq_n_s16(q0s16, 3); q1s16 = vshrq_n_s16(q1s16, 3); // store vst1_lane_s16(mb_dqcoeff, vget_low_s16(q0s16), 0); mb_dqcoeff += 16; vst1_lane_s16(mb_dqcoeff, vget_high_s16(q0s16), 0); mb_dqcoeff += 16; vst1_lane_s16(mb_dqcoeff, vget_low_s16(q1s16), 0); mb_dqcoeff += 16; vst1_lane_s16(mb_dqcoeff, vget_high_s16(q1s16), 0); mb_dqcoeff += 16; vst1_lane_s16(mb_dqcoeff, vget_low_s16(q0s16), 1); mb_dqcoeff += 16; vst1_lane_s16(mb_dqcoeff, vget_high_s16(q0s16), 1); mb_dqcoeff += 16; vst1_lane_s16(mb_dqcoeff, vget_low_s16(q1s16), 1); mb_dqcoeff += 16; vst1_lane_s16(mb_dqcoeff, vget_high_s16(q1s16), 1); mb_dqcoeff += 16; vst1_lane_s16(mb_dqcoeff, vget_low_s16(q0s16), 2); mb_dqcoeff += 16; vst1_lane_s16(mb_dqcoeff, vget_high_s16(q0s16), 2); mb_dqcoeff += 16; vst1_lane_s16(mb_dqcoeff, vget_low_s16(q1s16), 2); mb_dqcoeff += 16; vst1_lane_s16(mb_dqcoeff, vget_high_s16(q1s16), 2); mb_dqcoeff += 16; vst1_lane_s16(mb_dqcoeff, vget_low_s16(q0s16), 3); mb_dqcoeff += 16; vst1_lane_s16(mb_dqcoeff, vget_high_s16(q0s16), 3); mb_dqcoeff += 16; vst1_lane_s16(mb_dqcoeff, vget_low_s16(q1s16), 3); mb_dqcoeff += 16; vst1_lane_s16(mb_dqcoeff, vget_high_s16(q1s16), 3); mb_dqcoeff += 16; return; }