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/* Copyright (C) 2010-2020 The RetroArch team
*
* ---------------------------------------------------------------------------------------
* The following license statement only applies to this file (sinc_resampler_neon.S).
* ---------------------------------------------------------------------------------------
*
* Permission is hereby granted, free of charge,
* to any person obtaining a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#if defined(__ARM_NEON__) && defined(HAVE_ARM_NEON_ASM_OPTIMIZATIONS)
#ifndef __MACH__
.arm
#endif
.align 4
.globl process_sinc_neon_asm
#ifndef __MACH__
.type process_sinc_neon_asm, %function
#endif
.globl _process_sinc_neon_asm
#ifndef __MACH__
.type _process_sinc_neon_asm, %function
#endif
# void process_sinc_neon(float *out, const float *left, const float *right, const float *coeff, unsigned taps)
# Assumes taps is >= 8, and a multiple of 8.
process_sinc_neon_asm:
_process_sinc_neon_asm:
push {r4, lr}
vmov.f32 q0, #0.0
vmov.f32 q8, #0.0
# Taps argument (r4) goes on stack in armeabi.
ldr r4, [sp, #8]
1:
# Left
vld1.f32 {q2-q3}, [r1]!
# Right
vld1.f32 {q10-q11}, [r2]!
# Coeff
vld1.f32 {q12-q13}, [r3, :128]!
# Left / Right
vmla.f32 q0, q2, q12
vmla.f32 q8, q10, q12
vmla.f32 q0, q3, q13
vmla.f32 q8, q11, q13
subs r4, r4, #8
bne 1b
# Add everything together
vadd.f32 d0, d0, d1
vadd.f32 d16, d16, d17
vpadd.f32 d0, d0, d16
vst1.f32 d0, [r0]
pop {r4, pc}
#endif
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