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https://github.com/CTCaer/RetroArch.git
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55 lines
1.5 KiB
ArmAsm
55 lines
1.5 KiB
ArmAsm
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2013 - Hans-Kristian Arntzen
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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.arm
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.align 4
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.global process_sinc_neon_asm
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# void process_sinc_neon(float *out, const float *left, const float *right, const float *coeff, unsigned taps)
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# Assumes taps is >= 8, and a multiple of 8.
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process_sinc_neon_asm:
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push {r4, lr}
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vmov.f32 q0, #0.0
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vmov.f32 q8, #0.0
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# Taps argument (r4) goes on stack in armeabi.
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ldr r4, [sp, #8]
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1:
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# Left
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vld1.f32 {q2-q3}, [r1]!
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# Right
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vld1.f32 {q10-q11}, [r2]!
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# Coeff
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vld1.f32 {q12-q13}, [r3, :128]!
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# Left / Right
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vmla.f32 q0, q2, q12
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vmla.f32 q8, q10, q12
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vmla.f32 q0, q3, q13
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vmla.f32 q8, q11, q13
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subs r4, r4, #8
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bne 1b
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# Add everything together
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vadd.f32 d0, d0, d1
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vadd.f32 d16, d16, d17
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vpadd.f32 d0, d0, d16
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vst1.f32 d0, [r0]
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pop {r4, pc}
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