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https://github.com/libretro/RetroArch
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75 lines
2.3 KiB
ArmAsm
75 lines
2.3 KiB
ArmAsm
/* Copyright (C) 2010-2017 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (sinc_resampler_neon.S).
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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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#if defined(__ARM_NEON__)
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#ifndef __MACH__
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.arm
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#endif
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.align 4
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.globl process_sinc_neon_asm
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#ifndef __MACH__
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.type process_sinc_neon_asm, %function
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#endif
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.globl _process_sinc_neon_asm
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#ifndef __MACH__
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.type _process_sinc_neon_asm, %function
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#endif
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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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_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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#endif
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