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Start adding NEON sinc.

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This commit is contained in:
Themaister 2012-12-03 00:22:07 +01:00
parent ba0a09eb91
commit 2b04e1ece6
2 changed files with 66 additions and 0 deletions
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14
audio/sinc.c
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@ -123,6 +123,8 @@ rarch_resampler_t *resampler_new(void)
RARCH_LOG("Sinc resampler [AVX]\n");
#elif defined(__SSE__)
RARCH_LOG("Sinc resampler [SSE]\n");
#elif defined(HAVE_NEON)
RARCH_LOG("Sinc resampler [NEON]\n");
#else
RARCH_LOG("Sinc resampler [C]\n");
#endif
@ -208,6 +210,18 @@ static void process_sinc(rarch_resampler_t *resamp, float *out_buffer)
// movehl { X, R, X, L } == { X, R, X, R }
_mm_store_ss(out_buffer + 1, _mm_movehl_ps(sum, sum));
}
#elif defined(HAVE_NEON)
void process_sinc_neon_asm(float *out, const float *left, const float *right, const float *coeff);
static void process_sinc(rarch_resampler_t *resamp, float *out_buffer)
{
const float *buffer_l = resamp->buffer_l + resamp->ptr;
const float *buffer_r = resamp->buffer_r + resamp->ptr;
unsigned phase = resamp->time >> SUBPHASE_BITS;
const float *phase_table = resamp->phase_table[phase];
process_sinc_neon_asm(out_buffer, buffer_l, buffer_r, phase_table);
}
#else // Plain ol' C99
static void process_sinc(rarch_resampler_t *resamp, float *out_buffer)
{

52
audio/sinc_neon.S Normal file
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@ -0,0 +1,52 @@
/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2012 - Hans-Kristian Arntzen
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
.arm
.align 4
.global process_sinc_neon_asm
# void process_sinc_neon(float *out, const float *left, const float *right, const float *coeff)
# Hardcoded to 16 taps.
process_sinc_neon_asm:
# Left
vld1.f32 {q0-q1}, [r1]!
vld1.f32 {q2-q3}, [r1]!
# Right
vld1.f32 {q4-q5}, [r2]!
vld1.f32 {q6-q7}, [r2]!
# Coeff
vld1.f32 {q8-q9}, [r3, :1024]!
vld1.f32 {q10-q11}, [r3, :1024]!
# Left
vmul.f32 q0, q0, q8
vmul.f32 q1, q1, q9
vmla.f32 q0, q2, q10
vmla.f32 q1, q3, q11
# Right
vmul.f32 q4, q4, q8
vmul.f32 q5, q5, q9
vmla.f32 q4, q6, q10
vmla.f32 q5, q7, q11
# Add everything together
vadd.f32 q0, q0, q1
vadd.f32 q4, q4, q5
vadd.f32 d0, d0, d1
vadd.f32 d8, d8, d9
vpadd.f32 d0, d0, d8
vst1.f32 d0, [r0]
bx lr