third_party/opus/celt/arm/pitch_neon_intr.c - cobalt - Git at Google

 /***********************************************************************
 Copyright (c) 2017 Google Inc.
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
 - Redistributions of source code must retain the above copyright notice,
 this list of conditions and the following disclaimer.
 - Redistributions in binary form must reproduce the above copyright
 notice, this list of conditions and the following disclaimer in the
 documentation and/or other materials provided with the distribution.
 - Neither the name of Internet Society, IETF or IETF Trust, nor the
 names of specific contributors, may be used to endorse or promote
 products derived from this software without specific prior written
 permission.
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGE.
 ***********************************************************************/

 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif

 #include <arm_neon.h>
 #include "pitch.h"

 #ifdef FIXED_POINT

 opus_val32 celt_inner_prod_neon(const opus_val16 *x, const opus_val16 *y, int N)
 {
     int i;
     opus_val32 xy;
     int16x8_t x_s16x8, y_s16x8;
     int32x4_t xy_s32x4 = vdupq_n_s32(0);
     int64x2_t xy_s64x2;
     int64x1_t xy_s64x1;

     for (i = 0; i < N - 7; i += 8) {
         x_s16x8  = vld1q_s16(&x[i]);
         y_s16x8  = vld1q_s16(&y[i]);
         xy_s32x4 = vmlal_s16(xy_s32x4, vget_low_s16 (x_s16x8), vget_low_s16 (y_s16x8));
         xy_s32x4 = vmlal_s16(xy_s32x4, vget_high_s16(x_s16x8), vget_high_s16(y_s16x8));
     }

     if (N - i >= 4) {
         const int16x4_t x_s16x4 = vld1_s16(&x[i]);
         const int16x4_t y_s16x4 = vld1_s16(&y[i]);
         xy_s32x4 = vmlal_s16(xy_s32x4, x_s16x4, y_s16x4);
         i += 4;
     }

     xy_s64x2 = vpaddlq_s32(xy_s32x4);
     xy_s64x1 = vadd_s64(vget_low_s64(xy_s64x2), vget_high_s64(xy_s64x2));
     xy       = vget_lane_s32(vreinterpret_s32_s64(xy_s64x1), 0);

     for (; i < N; i++) {
         xy = MAC16_16(xy, x[i], y[i]);
     }

 #ifdef OPUS_CHECK_ASM
     celt_assert(celt_inner_prod_c(x, y, N) == xy);
 #endif

     return xy;
 }

 void dual_inner_prod_neon(const opus_val16 *x, const opus_val16 *y01, const opus_val16 *y02,
         int N, opus_val32 *xy1, opus_val32 *xy2)
 {
     int i;
     opus_val32 xy01, xy02;
     int16x8_t x_s16x8, y01_s16x8, y02_s16x8;
     int32x4_t xy01_s32x4 = vdupq_n_s32(0);
     int32x4_t xy02_s32x4 = vdupq_n_s32(0);
     int64x2_t xy01_s64x2, xy02_s64x2;
     int64x1_t xy01_s64x1, xy02_s64x1;

     for (i = 0; i < N - 7; i += 8) {
         x_s16x8    = vld1q_s16(&x[i]);
         y01_s16x8  = vld1q_s16(&y01[i]);
         y02_s16x8  = vld1q_s16(&y02[i]);
         xy01_s32x4 = vmlal_s16(xy01_s32x4, vget_low_s16 (x_s16x8), vget_low_s16 (y01_s16x8));
         xy02_s32x4 = vmlal_s16(xy02_s32x4, vget_low_s16 (x_s16x8), vget_low_s16 (y02_s16x8));
         xy01_s32x4 = vmlal_s16(xy01_s32x4, vget_high_s16(x_s16x8), vget_high_s16(y01_s16x8));
         xy02_s32x4 = vmlal_s16(xy02_s32x4, vget_high_s16(x_s16x8), vget_high_s16(y02_s16x8));
     }

     if (N - i >= 4) {
         const int16x4_t x_s16x4   = vld1_s16(&x[i]);
         const int16x4_t y01_s16x4 = vld1_s16(&y01[i]);
         const int16x4_t y02_s16x4 = vld1_s16(&y02[i]);
         xy01_s32x4 = vmlal_s16(xy01_s32x4, x_s16x4, y01_s16x4);
         xy02_s32x4 = vmlal_s16(xy02_s32x4, x_s16x4, y02_s16x4);
         i += 4;
     }

     xy01_s64x2 = vpaddlq_s32(xy01_s32x4);
     xy02_s64x2 = vpaddlq_s32(xy02_s32x4);
     xy01_s64x1 = vadd_s64(vget_low_s64(xy01_s64x2), vget_high_s64(xy01_s64x2));
     xy02_s64x1 = vadd_s64(vget_low_s64(xy02_s64x2), vget_high_s64(xy02_s64x2));
     xy01       = vget_lane_s32(vreinterpret_s32_s64(xy01_s64x1), 0);
     xy02       = vget_lane_s32(vreinterpret_s32_s64(xy02_s64x1), 0);

     for (; i < N; i++) {
         xy01 = MAC16_16(xy01, x[i], y01[i]);
         xy02 = MAC16_16(xy02, x[i], y02[i]);
     }
     *xy1 = xy01;
     *xy2 = xy02;

 #ifdef OPUS_CHECK_ASM
     {
         opus_val32 xy1_c, xy2_c;
         dual_inner_prod_c(x, y01, y02, N, &xy1_c, &xy2_c);
         celt_assert(xy1_c == *xy1);
         celt_assert(xy2_c == *xy2);
     }
 #endif
 }

 #else /* !FIXED_POINT */

 /* ========================================================================== */

 #ifdef OPUS_CHECK_ASM

 /* This part of code simulates floating-point NEON operations. */

 /* celt_inner_prod_neon_float_c_simulation() simulates the floating-point   */
 /* operations of celt_inner_prod_neon(), and both functions should have bit */
 /* exact output.                                                            */
 static opus_val32 celt_inner_prod_neon_float_c_simulation(const opus_val16 *x, const opus_val16 *y, int N)
 {
    int i;
    opus_val32 xy, xy0 = 0, xy1 = 0, xy2 = 0, xy3 = 0;
    for (i = 0; i < N - 3; i += 4) {
       xy0 = MAC16_16(xy0, x[i + 0], y[i + 0]);
       xy1 = MAC16_16(xy1, x[i + 1], y[i + 1]);
       xy2 = MAC16_16(xy2, x[i + 2], y[i + 2]);
       xy3 = MAC16_16(xy3, x[i + 3], y[i + 3]);
    }
    xy0 += xy2;
    xy1 += xy3;
    xy = xy0 + xy1;
    for (; i < N; i++) {
       xy = MAC16_16(xy, x[i], y[i]);
    }
    return xy;
 }

 /* dual_inner_prod_neon_float_c_simulation() simulates the floating-point   */
 /* operations of dual_inner_prod_neon(), and both functions should have bit */
 /* exact output.                                                            */
 static void dual_inner_prod_neon_float_c_simulation(const opus_val16 *x, const opus_val16 *y01, const opus_val16 *y02,
       int N, opus_val32 *xy1, opus_val32 *xy2)
 {
    int i;
    opus_val32 xy01, xy02, xy01_0 = 0, xy01_1 = 0, xy01_2 = 0, xy01_3 = 0, xy02_0 = 0, xy02_1 = 0, xy02_2 = 0, xy02_3 = 0;
    for (i = 0; i < N - 3; i += 4) {
       xy01_0 = MAC16_16(xy01_0, x[i + 0], y01[i + 0]);
       xy01_1 = MAC16_16(xy01_1, x[i + 1], y01[i + 1]);
       xy01_2 = MAC16_16(xy01_2, x[i + 2], y01[i + 2]);
       xy01_3 = MAC16_16(xy01_3, x[i + 3], y01[i + 3]);
       xy02_0 = MAC16_16(xy02_0, x[i + 0], y02[i + 0]);
       xy02_1 = MAC16_16(xy02_1, x[i + 1], y02[i + 1]);
       xy02_2 = MAC16_16(xy02_2, x[i + 2], y02[i + 2]);
       xy02_3 = MAC16_16(xy02_3, x[i + 3], y02[i + 3]);
    }
    xy01_0 += xy01_2;
    xy02_0 += xy02_2;
    xy01_1 += xy01_3;
    xy02_1 += xy02_3;
    xy01 = xy01_0 + xy01_1;
    xy02 = xy02_0 + xy02_1;
    for (; i < N; i++) {
       xy01 = MAC16_16(xy01, x[i], y01[i]);
       xy02 = MAC16_16(xy02, x[i], y02[i]);
    }
    *xy1 = xy01;
    *xy2 = xy02;
 }

 #endif /* OPUS_CHECK_ASM */

 /* ========================================================================== */

 opus_val32 celt_inner_prod_neon(const opus_val16 *x, const opus_val16 *y, int N)
 {
     int i;
     opus_val32 xy;
     float32x4_t xy_f32x4 = vdupq_n_f32(0);
     float32x2_t xy_f32x2;

     for (i = 0; i < N - 7; i += 8) {
         float32x4_t x_f32x4, y_f32x4;
         x_f32x4  = vld1q_f32(&x[i]);
         y_f32x4  = vld1q_f32(&y[i]);
         xy_f32x4 = vmlaq_f32(xy_f32x4, x_f32x4, y_f32x4);
         x_f32x4  = vld1q_f32(&x[i + 4]);
         y_f32x4  = vld1q_f32(&y[i + 4]);
         xy_f32x4 = vmlaq_f32(xy_f32x4, x_f32x4, y_f32x4);
     }

     if (N - i >= 4) {
         const float32x4_t x_f32x4 = vld1q_f32(&x[i]);
         const float32x4_t y_f32x4 = vld1q_f32(&y[i]);
         xy_f32x4 = vmlaq_f32(xy_f32x4, x_f32x4, y_f32x4);
         i += 4;
     }

     xy_f32x2 = vadd_f32(vget_low_f32(xy_f32x4), vget_high_f32(xy_f32x4));
     xy_f32x2 = vpadd_f32(xy_f32x2, xy_f32x2);
     xy       = vget_lane_f32(xy_f32x2, 0);

     for (; i < N; i++) {
         xy = MAC16_16(xy, x[i], y[i]);
     }

 #ifdef OPUS_CHECK_ASM
     celt_assert(ABS32(celt_inner_prod_neon_float_c_simulation(x, y, N) - xy) <= VERY_SMALL);
 #endif

     return xy;
 }

 void dual_inner_prod_neon(const opus_val16 *x, const opus_val16 *y01, const opus_val16 *y02,
         int N, opus_val32 *xy1, opus_val32 *xy2)
 {
     int i;
     opus_val32 xy01, xy02;
     float32x4_t xy01_f32x4 = vdupq_n_f32(0);
     float32x4_t xy02_f32x4 = vdupq_n_f32(0);
     float32x2_t xy01_f32x2, xy02_f32x2;

     for (i = 0; i < N - 7; i += 8) {
         float32x4_t x_f32x4, y01_f32x4, y02_f32x4;
         x_f32x4    = vld1q_f32(&x[i]);
         y01_f32x4  = vld1q_f32(&y01[i]);
         y02_f32x4  = vld1q_f32(&y02[i]);
         xy01_f32x4 = vmlaq_f32(xy01_f32x4, x_f32x4, y01_f32x4);
         xy02_f32x4 = vmlaq_f32(xy02_f32x4, x_f32x4, y02_f32x4);
         x_f32x4    = vld1q_f32(&x[i + 4]);
         y01_f32x4  = vld1q_f32(&y01[i + 4]);
         y02_f32x4  = vld1q_f32(&y02[i + 4]);
         xy01_f32x4 = vmlaq_f32(xy01_f32x4, x_f32x4, y01_f32x4);
         xy02_f32x4 = vmlaq_f32(xy02_f32x4, x_f32x4, y02_f32x4);
     }

     if (N - i >= 4) {
         const float32x4_t x_f32x4   = vld1q_f32(&x[i]);
         const float32x4_t y01_f32x4 = vld1q_f32(&y01[i]);
         const float32x4_t y02_f32x4 = vld1q_f32(&y02[i]);
         xy01_f32x4 = vmlaq_f32(xy01_f32x4, x_f32x4, y01_f32x4);
         xy02_f32x4 = vmlaq_f32(xy02_f32x4, x_f32x4, y02_f32x4);
         i += 4;
     }

     xy01_f32x2 = vadd_f32(vget_low_f32(xy01_f32x4), vget_high_f32(xy01_f32x4));
     xy02_f32x2 = vadd_f32(vget_low_f32(xy02_f32x4), vget_high_f32(xy02_f32x4));
     xy01_f32x2 = vpadd_f32(xy01_f32x2, xy01_f32x2);
     xy02_f32x2 = vpadd_f32(xy02_f32x2, xy02_f32x2);
     xy01       = vget_lane_f32(xy01_f32x2, 0);
     xy02       = vget_lane_f32(xy02_f32x2, 0);

     for (; i < N; i++) {
         xy01 = MAC16_16(xy01, x[i], y01[i]);
         xy02 = MAC16_16(xy02, x[i], y02[i]);
     }
     *xy1 = xy01;
     *xy2 = xy02;

 #ifdef OPUS_CHECK_ASM
     {
         opus_val32 xy1_c, xy2_c;
         dual_inner_prod_neon_float_c_simulation(x, y01, y02, N, &xy1_c, &xy2_c);
         celt_assert(ABS32(xy1_c - *xy1) <= VERY_SMALL);
         celt_assert(ABS32(xy2_c - *xy2) <= VERY_SMALL);
     }
 #endif
 }

 #endif /* FIXED_POINT */
	/***********************************************************************
	Copyright (c) 2017 Google Inc.
	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions
	are met:
	- Redistributions of source code must retain the above copyright notice,
	this list of conditions and the following disclaimer.
	- Redistributions in binary form must reproduce the above copyright
	notice, this list of conditions and the following disclaimer in the
	documentation and/or other materials provided with the distribution.
	- Neither the name of Internet Society, IETF or IETF Trust, nor the
	names of specific contributors, may be used to endorse or promote
	products derived from this software without specific prior written
	permission.
	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
	LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	POSSIBILITY OF SUCH DAMAGE.
	***********************************************************************/

	#ifdef HAVE_CONFIG_H
	#include "config.h"
	#endif

	#include <arm_neon.h>
	#include "pitch.h"

	#ifdef FIXED_POINT

	opus_val32 celt_inner_prod_neon(const opus_val16 x, const opus_val16 y, int N)
	{
	int i;
	opus_val32 xy;
	int16x8_t x_s16x8, y_s16x8;
	int32x4_t xy_s32x4 = vdupq_n_s32(0);
	int64x2_t xy_s64x2;
	int64x1_t xy_s64x1;

	for (i = 0; i < N - 7; i += 8) {
	x_s16x8 = vld1q_s16(&x[i]);
	y_s16x8 = vld1q_s16(&y[i]);
	xy_s32x4 = vmlal_s16(xy_s32x4, vget_low_s16 (x_s16x8), vget_low_s16 (y_s16x8));
	xy_s32x4 = vmlal_s16(xy_s32x4, vget_high_s16(x_s16x8), vget_high_s16(y_s16x8));
	}

	if (N - i >= 4) {
	const int16x4_t x_s16x4 = vld1_s16(&x[i]);
	const int16x4_t y_s16x4 = vld1_s16(&y[i]);
	xy_s32x4 = vmlal_s16(xy_s32x4, x_s16x4, y_s16x4);
	i += 4;
	}

	xy_s64x2 = vpaddlq_s32(xy_s32x4);
	xy_s64x1 = vadd_s64(vget_low_s64(xy_s64x2), vget_high_s64(xy_s64x2));
	xy = vget_lane_s32(vreinterpret_s32_s64(xy_s64x1), 0);

	for (; i < N; i++) {
	xy = MAC16_16(xy, x[i], y[i]);
	}

	#ifdef OPUS_CHECK_ASM
	celt_assert(celt_inner_prod_c(x, y, N) == xy);
	#endif

	return xy;
	}

	void dual_inner_prod_neon(const opus_val16 x, const opus_val16 y01, const opus_val16 *y02,
	int N, opus_val32 xy1, opus_val32 xy2)
	{
	int i;
	opus_val32 xy01, xy02;
	int16x8_t x_s16x8, y01_s16x8, y02_s16x8;
	int32x4_t xy01_s32x4 = vdupq_n_s32(0);
	int32x4_t xy02_s32x4 = vdupq_n_s32(0);
	int64x2_t xy01_s64x2, xy02_s64x2;
	int64x1_t xy01_s64x1, xy02_s64x1;

	for (i = 0; i < N - 7; i += 8) {
	x_s16x8 = vld1q_s16(&x[i]);
	y01_s16x8 = vld1q_s16(&y01[i]);
	y02_s16x8 = vld1q_s16(&y02[i]);
	xy01_s32x4 = vmlal_s16(xy01_s32x4, vget_low_s16 (x_s16x8), vget_low_s16 (y01_s16x8));
	xy02_s32x4 = vmlal_s16(xy02_s32x4, vget_low_s16 (x_s16x8), vget_low_s16 (y02_s16x8));
	xy01_s32x4 = vmlal_s16(xy01_s32x4, vget_high_s16(x_s16x8), vget_high_s16(y01_s16x8));
	xy02_s32x4 = vmlal_s16(xy02_s32x4, vget_high_s16(x_s16x8), vget_high_s16(y02_s16x8));
	}

	if (N - i >= 4) {
	const int16x4_t x_s16x4 = vld1_s16(&x[i]);
	const int16x4_t y01_s16x4 = vld1_s16(&y01[i]);
	const int16x4_t y02_s16x4 = vld1_s16(&y02[i]);
	xy01_s32x4 = vmlal_s16(xy01_s32x4, x_s16x4, y01_s16x4);
	xy02_s32x4 = vmlal_s16(xy02_s32x4, x_s16x4, y02_s16x4);
	i += 4;
	}

	xy01_s64x2 = vpaddlq_s32(xy01_s32x4);
	xy02_s64x2 = vpaddlq_s32(xy02_s32x4);
	xy01_s64x1 = vadd_s64(vget_low_s64(xy01_s64x2), vget_high_s64(xy01_s64x2));
	xy02_s64x1 = vadd_s64(vget_low_s64(xy02_s64x2), vget_high_s64(xy02_s64x2));
	xy01 = vget_lane_s32(vreinterpret_s32_s64(xy01_s64x1), 0);
	xy02 = vget_lane_s32(vreinterpret_s32_s64(xy02_s64x1), 0);

	for (; i < N; i++) {
	xy01 = MAC16_16(xy01, x[i], y01[i]);
	xy02 = MAC16_16(xy02, x[i], y02[i]);
	}
	*xy1 = xy01;
	*xy2 = xy02;

	#ifdef OPUS_CHECK_ASM
	{
	opus_val32 xy1_c, xy2_c;
	dual_inner_prod_c(x, y01, y02, N, &xy1_c, &xy2_c);
	celt_assert(xy1_c == *xy1);
	celt_assert(xy2_c == *xy2);
	}
	#endif
	}

	#else /* !FIXED_POINT */

	/* ========================================================================== */

	#ifdef OPUS_CHECK_ASM

	/* This part of code simulates floating-point NEON operations. */

	/* celt_inner_prod_neon_float_c_simulation() simulates the floating-point */
	/* operations of celt_inner_prod_neon(), and both functions should have bit */
	/* exact output. */
	static opus_val32 celt_inner_prod_neon_float_c_simulation(const opus_val16 x, const opus_val16 y, int N)
	{
	int i;
	opus_val32 xy, xy0 = 0, xy1 = 0, xy2 = 0, xy3 = 0;
	for (i = 0; i < N - 3; i += 4) {
	xy0 = MAC16_16(xy0, x[i + 0], y[i + 0]);
	xy1 = MAC16_16(xy1, x[i + 1], y[i + 1]);
	xy2 = MAC16_16(xy2, x[i + 2], y[i + 2]);
	xy3 = MAC16_16(xy3, x[i + 3], y[i + 3]);
	}
	xy0 += xy2;
	xy1 += xy3;
	xy = xy0 + xy1;
	for (; i < N; i++) {
	xy = MAC16_16(xy, x[i], y[i]);
	}
	return xy;
	}

	/* dual_inner_prod_neon_float_c_simulation() simulates the floating-point */
	/* operations of dual_inner_prod_neon(), and both functions should have bit */
	/* exact output. */
	static void dual_inner_prod_neon_float_c_simulation(const opus_val16 x, const opus_val16 y01, const opus_val16 *y02,
	int N, opus_val32 xy1, opus_val32 xy2)
	{
	int i;
	opus_val32 xy01, xy02, xy01_0 = 0, xy01_1 = 0, xy01_2 = 0, xy01_3 = 0, xy02_0 = 0, xy02_1 = 0, xy02_2 = 0, xy02_3 = 0;
	for (i = 0; i < N - 3; i += 4) {
	xy01_0 = MAC16_16(xy01_0, x[i + 0], y01[i + 0]);
	xy01_1 = MAC16_16(xy01_1, x[i + 1], y01[i + 1]);
	xy01_2 = MAC16_16(xy01_2, x[i + 2], y01[i + 2]);
	xy01_3 = MAC16_16(xy01_3, x[i + 3], y01[i + 3]);
	xy02_0 = MAC16_16(xy02_0, x[i + 0], y02[i + 0]);
	xy02_1 = MAC16_16(xy02_1, x[i + 1], y02[i + 1]);
	xy02_2 = MAC16_16(xy02_2, x[i + 2], y02[i + 2]);
	xy02_3 = MAC16_16(xy02_3, x[i + 3], y02[i + 3]);
	}
	xy01_0 += xy01_2;
	xy02_0 += xy02_2;
	xy01_1 += xy01_3;
	xy02_1 += xy02_3;
	xy01 = xy01_0 + xy01_1;
	xy02 = xy02_0 + xy02_1;
	for (; i < N; i++) {
	xy01 = MAC16_16(xy01, x[i], y01[i]);
	xy02 = MAC16_16(xy02, x[i], y02[i]);
	}
	*xy1 = xy01;
	*xy2 = xy02;
	}

	#endif /* OPUS_CHECK_ASM */

	/* ========================================================================== */

	opus_val32 celt_inner_prod_neon(const opus_val16 x, const opus_val16 y, int N)
	{
	int i;
	opus_val32 xy;
	float32x4_t xy_f32x4 = vdupq_n_f32(0);
	float32x2_t xy_f32x2;

	for (i = 0; i < N - 7; i += 8) {
	float32x4_t x_f32x4, y_f32x4;
	x_f32x4 = vld1q_f32(&x[i]);
	y_f32x4 = vld1q_f32(&y[i]);
	xy_f32x4 = vmlaq_f32(xy_f32x4, x_f32x4, y_f32x4);
	x_f32x4 = vld1q_f32(&x[i + 4]);
	y_f32x4 = vld1q_f32(&y[i + 4]);
	xy_f32x4 = vmlaq_f32(xy_f32x4, x_f32x4, y_f32x4);
	}

	if (N - i >= 4) {
	const float32x4_t x_f32x4 = vld1q_f32(&x[i]);
	const float32x4_t y_f32x4 = vld1q_f32(&y[i]);
	xy_f32x4 = vmlaq_f32(xy_f32x4, x_f32x4, y_f32x4);
	i += 4;
	}

	xy_f32x2 = vadd_f32(vget_low_f32(xy_f32x4), vget_high_f32(xy_f32x4));
	xy_f32x2 = vpadd_f32(xy_f32x2, xy_f32x2);
	xy = vget_lane_f32(xy_f32x2, 0);

	for (; i < N; i++) {
	xy = MAC16_16(xy, x[i], y[i]);
	}

	#ifdef OPUS_CHECK_ASM
	celt_assert(ABS32(celt_inner_prod_neon_float_c_simulation(x, y, N) - xy) <= VERY_SMALL);
	#endif

	return xy;
	}

	void dual_inner_prod_neon(const opus_val16 x, const opus_val16 y01, const opus_val16 *y02,
	int N, opus_val32 xy1, opus_val32 xy2)
	{
	int i;
	opus_val32 xy01, xy02;
	float32x4_t xy01_f32x4 = vdupq_n_f32(0);
	float32x4_t xy02_f32x4 = vdupq_n_f32(0);
	float32x2_t xy01_f32x2, xy02_f32x2;

	for (i = 0; i < N - 7; i += 8) {
	float32x4_t x_f32x4, y01_f32x4, y02_f32x4;
	x_f32x4 = vld1q_f32(&x[i]);
	y01_f32x4 = vld1q_f32(&y01[i]);
	y02_f32x4 = vld1q_f32(&y02[i]);
	xy01_f32x4 = vmlaq_f32(xy01_f32x4, x_f32x4, y01_f32x4);
	xy02_f32x4 = vmlaq_f32(xy02_f32x4, x_f32x4, y02_f32x4);
	x_f32x4 = vld1q_f32(&x[i + 4]);
	y01_f32x4 = vld1q_f32(&y01[i + 4]);
	y02_f32x4 = vld1q_f32(&y02[i + 4]);
	xy01_f32x4 = vmlaq_f32(xy01_f32x4, x_f32x4, y01_f32x4);
	xy02_f32x4 = vmlaq_f32(xy02_f32x4, x_f32x4, y02_f32x4);
	}

	if (N - i >= 4) {
	const float32x4_t x_f32x4 = vld1q_f32(&x[i]);
	const float32x4_t y01_f32x4 = vld1q_f32(&y01[i]);
	const float32x4_t y02_f32x4 = vld1q_f32(&y02[i]);
	xy01_f32x4 = vmlaq_f32(xy01_f32x4, x_f32x4, y01_f32x4);
	xy02_f32x4 = vmlaq_f32(xy02_f32x4, x_f32x4, y02_f32x4);
	i += 4;
	}

	xy01_f32x2 = vadd_f32(vget_low_f32(xy01_f32x4), vget_high_f32(xy01_f32x4));
	xy02_f32x2 = vadd_f32(vget_low_f32(xy02_f32x4), vget_high_f32(xy02_f32x4));
	xy01_f32x2 = vpadd_f32(xy01_f32x2, xy01_f32x2);
	xy02_f32x2 = vpadd_f32(xy02_f32x2, xy02_f32x2);
	xy01 = vget_lane_f32(xy01_f32x2, 0);
	xy02 = vget_lane_f32(xy02_f32x2, 0);

	for (; i < N; i++) {
	xy01 = MAC16_16(xy01, x[i], y01[i]);
	xy02 = MAC16_16(xy02, x[i], y02[i]);
	}
	*xy1 = xy01;
	*xy2 = xy02;

	#ifdef OPUS_CHECK_ASM
	{
	opus_val32 xy1_c, xy2_c;
	dual_inner_prod_neon_float_c_simulation(x, y01, y02, N, &xy1_c, &xy2_c);
	celt_assert(ABS32(xy1_c - *xy1) <= VERY_SMALL);
	celt_assert(ABS32(xy2_c - *xy2) <= VERY_SMALL);
	}
	#endif
	}

	#endif /* FIXED_POINT */