151 lines
5 KiB
C
151 lines
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 vpx_idct4x4_16_add_neon(
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int16_t *input,
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uint8_t *dest,
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int dest_stride) {
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uint8x8_t d26u8, d27u8;
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uint32x2_t d26u32, d27u32;
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uint16x8_t q8u16, q9u16;
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int16x4_t d16s16, d17s16, d18s16, d19s16, d20s16, d21s16;
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int16x4_t d22s16, d23s16, d24s16, d26s16, d27s16, d28s16, d29s16;
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int16x8_t q8s16, q9s16, q13s16, q14s16;
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int32x4_t q1s32, q13s32, q14s32, q15s32;
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int16x4x2_t d0x2s16, d1x2s16;
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int32x4x2_t q0x2s32;
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uint8_t *d;
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int16_t cospi_8_64 = 15137;
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int16_t cospi_16_64 = 11585;
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int16_t cospi_24_64 = 6270;
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d26u32 = d27u32 = vdup_n_u32(0);
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q8s16 = vld1q_s16(input);
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q9s16 = vld1q_s16(input + 8);
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d16s16 = vget_low_s16(q8s16);
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d17s16 = vget_high_s16(q8s16);
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d18s16 = vget_low_s16(q9s16);
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d19s16 = vget_high_s16(q9s16);
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d0x2s16 = vtrn_s16(d16s16, d17s16);
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d1x2s16 = vtrn_s16(d18s16, d19s16);
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q8s16 = vcombine_s16(d0x2s16.val[0], d0x2s16.val[1]);
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q9s16 = vcombine_s16(d1x2s16.val[0], d1x2s16.val[1]);
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d20s16 = vdup_n_s16(cospi_8_64);
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d21s16 = vdup_n_s16(cospi_16_64);
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q0x2s32 = vtrnq_s32(vreinterpretq_s32_s16(q8s16),
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vreinterpretq_s32_s16(q9s16));
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d16s16 = vget_low_s16(vreinterpretq_s16_s32(q0x2s32.val[0]));
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d17s16 = vget_high_s16(vreinterpretq_s16_s32(q0x2s32.val[0]));
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d18s16 = vget_low_s16(vreinterpretq_s16_s32(q0x2s32.val[1]));
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d19s16 = vget_high_s16(vreinterpretq_s16_s32(q0x2s32.val[1]));
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d22s16 = vdup_n_s16(cospi_24_64);
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// stage 1
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d23s16 = vadd_s16(d16s16, d18s16);
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d24s16 = vsub_s16(d16s16, d18s16);
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q15s32 = vmull_s16(d17s16, d22s16);
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q1s32 = vmull_s16(d17s16, d20s16);
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q13s32 = vmull_s16(d23s16, d21s16);
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q14s32 = vmull_s16(d24s16, d21s16);
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q15s32 = vmlsl_s16(q15s32, d19s16, d20s16);
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q1s32 = vmlal_s16(q1s32, d19s16, d22s16);
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d26s16 = vqrshrn_n_s32(q13s32, 14);
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d27s16 = vqrshrn_n_s32(q14s32, 14);
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d29s16 = vqrshrn_n_s32(q15s32, 14);
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d28s16 = vqrshrn_n_s32(q1s32, 14);
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q13s16 = vcombine_s16(d26s16, d27s16);
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q14s16 = vcombine_s16(d28s16, d29s16);
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// stage 2
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q8s16 = vaddq_s16(q13s16, q14s16);
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q9s16 = vsubq_s16(q13s16, q14s16);
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d16s16 = vget_low_s16(q8s16);
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d17s16 = vget_high_s16(q8s16);
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d18s16 = vget_high_s16(q9s16); // vswp d18 d19
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d19s16 = vget_low_s16(q9s16);
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d0x2s16 = vtrn_s16(d16s16, d17s16);
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d1x2s16 = vtrn_s16(d18s16, d19s16);
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q8s16 = vcombine_s16(d0x2s16.val[0], d0x2s16.val[1]);
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q9s16 = vcombine_s16(d1x2s16.val[0], d1x2s16.val[1]);
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q0x2s32 = vtrnq_s32(vreinterpretq_s32_s16(q8s16),
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vreinterpretq_s32_s16(q9s16));
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d16s16 = vget_low_s16(vreinterpretq_s16_s32(q0x2s32.val[0]));
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d17s16 = vget_high_s16(vreinterpretq_s16_s32(q0x2s32.val[0]));
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d18s16 = vget_low_s16(vreinterpretq_s16_s32(q0x2s32.val[1]));
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d19s16 = vget_high_s16(vreinterpretq_s16_s32(q0x2s32.val[1]));
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// do the transform on columns
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// stage 1
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d23s16 = vadd_s16(d16s16, d18s16);
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d24s16 = vsub_s16(d16s16, d18s16);
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q15s32 = vmull_s16(d17s16, d22s16);
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q1s32 = vmull_s16(d17s16, d20s16);
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q13s32 = vmull_s16(d23s16, d21s16);
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q14s32 = vmull_s16(d24s16, d21s16);
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q15s32 = vmlsl_s16(q15s32, d19s16, d20s16);
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q1s32 = vmlal_s16(q1s32, d19s16, d22s16);
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d26s16 = vqrshrn_n_s32(q13s32, 14);
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d27s16 = vqrshrn_n_s32(q14s32, 14);
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d29s16 = vqrshrn_n_s32(q15s32, 14);
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d28s16 = vqrshrn_n_s32(q1s32, 14);
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q13s16 = vcombine_s16(d26s16, d27s16);
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q14s16 = vcombine_s16(d28s16, d29s16);
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// stage 2
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q8s16 = vaddq_s16(q13s16, q14s16);
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q9s16 = vsubq_s16(q13s16, q14s16);
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q8s16 = vrshrq_n_s16(q8s16, 4);
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q9s16 = vrshrq_n_s16(q9s16, 4);
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d = dest;
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d26u32 = vld1_lane_u32((const uint32_t *)d, d26u32, 0);
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d += dest_stride;
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d26u32 = vld1_lane_u32((const uint32_t *)d, d26u32, 1);
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d += dest_stride;
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d27u32 = vld1_lane_u32((const uint32_t *)d, d27u32, 1);
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d += dest_stride;
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d27u32 = vld1_lane_u32((const uint32_t *)d, d27u32, 0);
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q8u16 = vaddw_u8(vreinterpretq_u16_s16(q8s16),
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vreinterpret_u8_u32(d26u32));
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q9u16 = vaddw_u8(vreinterpretq_u16_s16(q9s16),
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vreinterpret_u8_u32(d27u32));
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d26u8 = vqmovun_s16(vreinterpretq_s16_u16(q8u16));
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d27u8 = vqmovun_s16(vreinterpretq_s16_u16(q9u16));
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d = dest;
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vst1_lane_u32((uint32_t *)d, vreinterpret_u32_u8(d26u8), 0);
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d += dest_stride;
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vst1_lane_u32((uint32_t *)d, vreinterpret_u32_u8(d26u8), 1);
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d += dest_stride;
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vst1_lane_u32((uint32_t *)d, vreinterpret_u32_u8(d27u8), 1);
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d += dest_stride;
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vst1_lane_u32((uint32_t *)d, vreinterpret_u32_u8(d27u8), 0);
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return;
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}
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