| /* |
| * 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> |
| #include "vpx_ports/arm.h" |
| |
| #ifdef VPX_INCOMPATIBLE_GCC |
| #include "./vp8_rtcd.h" |
| void vp8_short_walsh4x4_neon( |
| int16_t *input, |
| int16_t *output, |
| int pitch) { |
| vp8_short_walsh4x4_c(input, output, pitch); |
| } |
| #else |
| void vp8_short_walsh4x4_neon( |
| int16_t *input, |
| int16_t *output, |
| int pitch) { |
| uint16x4_t d16u16; |
| int16x8_t q0s16, q1s16; |
| int16x4_t dEmptys16, d0s16, d1s16, d2s16, d3s16, d4s16, d5s16, d6s16, d7s16; |
| int32x4_t qEmptys32, q0s32, q1s32, q2s32, q3s32, q8s32; |
| int32x4_t q9s32, q10s32, q11s32, q15s32; |
| uint32x4_t q8u32, q9u32, q10u32, q11u32; |
| int16x4x2_t v2tmp0, v2tmp1; |
| int32x2x2_t v2tmp2, v2tmp3; |
| |
| dEmptys16 = vdup_n_s16(0); |
| qEmptys32 = vdupq_n_s32(0); |
| q15s32 = vdupq_n_s32(3); |
| |
| d0s16 = vld1_s16(input); |
| input += pitch/2; |
| d1s16 = vld1_s16(input); |
| input += pitch/2; |
| d2s16 = vld1_s16(input); |
| input += pitch/2; |
| d3s16 = vld1_s16(input); |
| |
| v2tmp2 = vtrn_s32(vreinterpret_s32_s16(d0s16), |
| vreinterpret_s32_s16(d2s16)); |
| v2tmp3 = vtrn_s32(vreinterpret_s32_s16(d1s16), |
| vreinterpret_s32_s16(d3s16)); |
| v2tmp0 = vtrn_s16(vreinterpret_s16_s32(v2tmp2.val[0]), // d0 |
| vreinterpret_s16_s32(v2tmp3.val[0])); // d1 |
| v2tmp1 = vtrn_s16(vreinterpret_s16_s32(v2tmp2.val[1]), // d2 |
| vreinterpret_s16_s32(v2tmp3.val[1])); // d3 |
| |
| d4s16 = vadd_s16(v2tmp0.val[0], v2tmp1.val[0]); |
| d5s16 = vadd_s16(v2tmp0.val[1], v2tmp1.val[1]); |
| d6s16 = vsub_s16(v2tmp0.val[1], v2tmp1.val[1]); |
| d7s16 = vsub_s16(v2tmp0.val[0], v2tmp1.val[0]); |
| |
| d4s16 = vshl_n_s16(d4s16, 2); |
| d5s16 = vshl_n_s16(d5s16, 2); |
| d6s16 = vshl_n_s16(d6s16, 2); |
| d7s16 = vshl_n_s16(d7s16, 2); |
| |
| d16u16 = vceq_s16(d4s16, dEmptys16); |
| d16u16 = vmvn_u16(d16u16); |
| |
| d0s16 = vadd_s16(d4s16, d5s16); |
| d3s16 = vsub_s16(d4s16, d5s16); |
| d1s16 = vadd_s16(d7s16, d6s16); |
| d2s16 = vsub_s16(d7s16, d6s16); |
| |
| d0s16 = vsub_s16(d0s16, vreinterpret_s16_u16(d16u16)); |
| |
| // Second for-loop |
| v2tmp2 = vtrn_s32(vreinterpret_s32_s16(d1s16), |
| vreinterpret_s32_s16(d3s16)); |
| v2tmp3 = vtrn_s32(vreinterpret_s32_s16(d0s16), |
| vreinterpret_s32_s16(d2s16)); |
| v2tmp0 = vtrn_s16(vreinterpret_s16_s32(v2tmp3.val[1]), // d2 |
| vreinterpret_s16_s32(v2tmp2.val[1])); // d3 |
| v2tmp1 = vtrn_s16(vreinterpret_s16_s32(v2tmp3.val[0]), // d0 |
| vreinterpret_s16_s32(v2tmp2.val[0])); // d1 |
| |
| q8s32 = vaddl_s16(v2tmp1.val[0], v2tmp0.val[0]); |
| q9s32 = vaddl_s16(v2tmp1.val[1], v2tmp0.val[1]); |
| q10s32 = vsubl_s16(v2tmp1.val[1], v2tmp0.val[1]); |
| q11s32 = vsubl_s16(v2tmp1.val[0], v2tmp0.val[0]); |
| |
| q0s32 = vaddq_s32(q8s32, q9s32); |
| q1s32 = vaddq_s32(q11s32, q10s32); |
| q2s32 = vsubq_s32(q11s32, q10s32); |
| q3s32 = vsubq_s32(q8s32, q9s32); |
| |
| q8u32 = vcltq_s32(q0s32, qEmptys32); |
| q9u32 = vcltq_s32(q1s32, qEmptys32); |
| q10u32 = vcltq_s32(q2s32, qEmptys32); |
| q11u32 = vcltq_s32(q3s32, qEmptys32); |
| |
| q8s32 = vreinterpretq_s32_u32(q8u32); |
| q9s32 = vreinterpretq_s32_u32(q9u32); |
| q10s32 = vreinterpretq_s32_u32(q10u32); |
| q11s32 = vreinterpretq_s32_u32(q11u32); |
| |
| q0s32 = vsubq_s32(q0s32, q8s32); |
| q1s32 = vsubq_s32(q1s32, q9s32); |
| q2s32 = vsubq_s32(q2s32, q10s32); |
| q3s32 = vsubq_s32(q3s32, q11s32); |
| |
| q8s32 = vaddq_s32(q0s32, q15s32); |
| q9s32 = vaddq_s32(q1s32, q15s32); |
| q10s32 = vaddq_s32(q2s32, q15s32); |
| q11s32 = vaddq_s32(q3s32, q15s32); |
| |
| d0s16 = vshrn_n_s32(q8s32, 3); |
| d1s16 = vshrn_n_s32(q9s32, 3); |
| d2s16 = vshrn_n_s32(q10s32, 3); |
| d3s16 = vshrn_n_s32(q11s32, 3); |
| |
| q0s16 = vcombine_s16(d0s16, d1s16); |
| q1s16 = vcombine_s16(d2s16, d3s16); |
| |
| vst1q_s16(output, q0s16); |
| vst1q_s16(output + 8, q1s16); |
| return; |
| } |
| #endif // VPX_INCOMPATIBLE_GCC |