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Add Neon intrinsics for vp9_avg_8x8_neon

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On Nexus 7 speed -5, -6, -7, and -8 saw about a 1% increase
in perf for 480p. Speeds -5, -6, -7, and -8 saw about a 1.5%
increase in perf for 720p.

Tested on Nexus 7, built with ndk r10d, gcc 4.9.

Change-Id: Ibf17ebfd952a6aec941719bd8306df8ec4574bee
This commit is contained in:
Frank Galligan 2015-01-15 14:36:41 -08:00
parent 1b7391a3a4
commit 6e7e1cf32f
4 changed files with 61 additions and 1 deletions
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10
test/vp9_avg_test.cc
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@ -165,4 +165,14 @@ INSTANTIATE_TEST_CASE_P(
#endif
#if HAVE_NEON
INSTANTIATE_TEST_CASE_P(
NEON, AverageTest,
::testing::Values(
make_tuple(16, 16, 0, 8, &vp9_avg_8x8_neon),
make_tuple(16, 16, 5, 8, &vp9_avg_8x8_neon),
make_tuple(32, 32, 15, 8, &vp9_avg_8x8_neon)));
#endif
} // namespace

2
vp9/common/vp9_rtcd_defs.pl
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@ -1098,7 +1098,7 @@ add_proto qw/unsigned int vp9_get_mb_ss/, "const int16_t *";
specialize qw/vp9_get_mb_ss/, "$sse2_x86inc";
add_proto qw/unsigned int vp9_avg_8x8/, "const uint8_t *, int p";
specialize qw/vp9_avg_8x8 sse2/;
specialize qw/vp9_avg_8x8 sse2 neon/;
add_proto qw/unsigned int vp9_avg_4x4/, "const uint8_t *, int p";
specialize qw/vp9_avg_4x4 sse2/;

49
vp9/encoder/arm/neon/vp9_avg_neon.c Normal file
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@ -0,0 +1,49 @@
/*
* Copyright (c) 2015 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 "./vp9_rtcd.h"
#include "./vpx_config.h"
#include "vpx/vpx_integer.h"
static INLINE unsigned int horizontal_add_u16x8(const uint16x8_t v_16x8) {
const uint32x4_t a = vpaddlq_u16(v_16x8);
const uint64x2_t b = vpaddlq_u32(a);
const uint32x2_t c = vadd_u32(vreinterpret_u32_u64(vget_low_u64(b)),
vreinterpret_u32_u64(vget_high_u64(b)));
return vget_lane_u32(c, 0);
}
unsigned int vp9_avg_8x8_neon(const uint8_t *s, int p) {
uint8x8_t v_s0 = vld1_u8(s);
const uint8x8_t v_s1 = vld1_u8(s + p);
uint16x8_t v_sum = vaddl_u8(v_s0, v_s1);
v_s0 = vld1_u8(s + 2 * p);
v_sum = vaddw_u8(v_sum, v_s0);
v_s0 = vld1_u8(s + 3 * p);
v_sum = vaddw_u8(v_sum, v_s0);
v_s0 = vld1_u8(s + 4 * p);
v_sum = vaddw_u8(v_sum, v_s0);
v_s0 = vld1_u8(s + 5 * p);
v_sum = vaddw_u8(v_sum, v_s0);
v_s0 = vld1_u8(s + 6 * p);
v_sum = vaddw_u8(v_sum, v_s0);
v_s0 = vld1_u8(s + 7 * p);
v_sum = vaddw_u8(v_sum, v_s0);
return (horizontal_add_u16x8(v_sum) + 32) >> 6;
}

1
vp9/vp9cx.mk
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@ -150,6 +150,7 @@ VP9_CX_SRCS-$(HAVE_AVX2) += encoder/x86/vp9_dct_avx2.c
VP9_CX_SRCS-$(HAVE_AVX2) += encoder/x86/vp9_error_intrin_avx2.c
VP9_CX_SRCS-$(HAVE_AVX2) += encoder/x86/vp9_variance_avx2.c
VP9_CX_SRCS-$(HAVE_NEON) += encoder/arm/neon/vp9_avg_neon.c
VP9_CX_SRCS-$(HAVE_NEON) += encoder/arm/neon/vp9_sad_neon.c
VP9_CX_SRCS-$(HAVE_NEON) += encoder/arm/neon/vp9_dct_neon.c
VP9_CX_SRCS-$(HAVE_NEON) += encoder/arm/neon/vp9_variance_neon.c