108 lines
3.4 KiB
C
108 lines
3.4 KiB
C
/* Copyright (C) 2010-2021 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (s32_to_float.c).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#if defined(__SSE2__)
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#include <emmintrin.h>
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#endif
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#include <boolean.h>
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#include <features/features_cpu.h>
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#include <audio/conversion/s32_to_float.h>
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#if (defined(__ARM_NEON__) || defined(HAVE_NEON))
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static bool s32_to_float_neon_enabled = false;
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#include <arm_neon.h>
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void convert_s32_to_float(float *out,
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const int32_t *in, size_t samples, float gain)
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{
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unsigned i = 0;
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if (s32_to_float_neon_enabled)
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{
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float gf = gain / UINT32_C(1U << 31);
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float32x4_t vgf = {gf, gf, gf, gf};
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while (samples >= 8)
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{
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float32x4x2_t oreg;
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int32x4x2_t inreg = vld1q_s32_x2(in); // why were these interleaved before?
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oreg.val[0] = vmulq_f32(vcvtq_f32_s32(inreg.val[0]), vgf);
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oreg.val[1] = vmulq_f32(vcvtq_f32_s32(inreg.val[1]), vgf);
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vst1q_f32_x2(out, oreg);
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in += 8;
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out += 8;
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samples -= 8;
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}
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}
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gain /= UINT32_C(0x80000000);
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for (; i < samples; i++)
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out[i] = (float)in[i] * gain;
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}
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void convert_s32_to_float_init_simd(void)
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{
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uint64_t cpu = cpu_features_get();
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if (cpu & RETRO_SIMD_NEON)
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s32_to_float_neon_enabled = true;
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}
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#else
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void convert_s32_to_float(float *out,
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const int32_t *in, size_t samples, float gain)
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{
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unsigned i = 0;
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#if defined(__SSE2__)
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float fgain = gain / UINT32_C(0x80000000);
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__m128 factor = _mm_set1_ps(fgain);
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for (i = 0; i + 8 <= samples; i += 8, in += 8, out += 8)
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{
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__m128i input = _mm_loadu_si128((const __m128i *)in);
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__m128i input2 = _mm_loadu_si128((const __m128i *)(in + 4));
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__m128 output_l = _mm_mul_ps(_mm_cvtepi32_ps(input), factor);
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__m128 output_r = _mm_mul_ps(_mm_cvtepi32_ps(input2), factor);
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_mm_storeu_ps(out + 0, output_l);
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_mm_storeu_ps(out + 4, output_r);
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}
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samples = samples - i;
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i = 0;
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#endif
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gain /= 0x80000000L;
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for (; i < samples; i++)
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out[i] = (float)in[i] * gain;
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}
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void convert_s32_to_float_init_simd(void) { }
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#endif
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