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d4494e6ed7
Using Neon for float to int conversion, and introducing platform- specific function for converting an array of float values to int16. Also adding appropriate unit test. Signed-off-by: Jean-Marc Valin <jeanmarcv@google.com>
65 lines
2.6 KiB
C
65 lines
2.6 KiB
C
/* Copyright (c) 2024 Arm Limited */
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if !defined(MATHOPS_ARM_H)
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# define MATHOPS_ARM_H
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#include "armcpu.h"
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#include "cpu_support.h"
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#include "opus_defines.h"
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# if !defined(DISABLE_FLOAT_API) && defined(OPUS_ARM_MAY_HAVE_NEON_INTR)
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#include <arm_neon.h>
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static inline int32x4_t vroundf(float32x4_t x)
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{
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# if defined(__aarch64__) || (defined(__ARM_ARCH) && __ARM_ARCH >= 8)
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return vcvtaq_s32_f32(x);
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# else
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uint32x4_t sign = vandq_u32(vreinterpretq_u32_f32(x), vdupq_n_u32(0x80000000));
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uint32x4_t bias = vdupq_n_u32(0x3F000000);
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return vcvtq_s32_f32(vaddq_f32(x, vreinterpretq_f32_u32(vorrq_u32(bias, sign))));
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# endif
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}
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void celt_float2int16_neon(const float * OPUS_RESTRICT in, short * OPUS_RESTRICT out, int cnt);
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# if defined(OPUS_HAVE_RTCD) && \
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(defined(OPUS_ARM_MAY_HAVE_NEON_INTR) && !defined(OPUS_ARM_PRESUME_NEON_INTR))
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extern void
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(*const CELT_FLOAT2INT16_IMPL[OPUS_ARCHMASK+1])(const float * OPUS_RESTRICT in, short * OPUS_RESTRICT out, int cnt);
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# define OVERRIDE_FLOAT2INT16 (1)
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# define celt_float2int16(in, out, cnt, arch) \
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((*CELT_FLOAT2INT16_IMPL[(arch)&OPUS_ARCHMASK])(in, out, cnt))
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# elif defined(OPUS_ARM_PRESUME_NEON_INTR)
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# define OVERRIDE_FLOAT2INT16 (1)
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# define celt_float2int16(in, out, cnt, arch) ((void)(arch), celt_float2int16_neon(in, out, cnt))
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# endif
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# endif
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#endif /* MATHOPS_ARM_H */
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