RetroArch/audio/sinc_neon.S
2014-01-01 01:50:59 +01:00

59 lines
1.6 KiB
ArmAsm

/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - 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/>.
*/
#if defined(__ARM_NEON__) || defined(HAVE_NEON)
.arm
.align 4
.globl process_sinc_neon_asm
.globl _process_sinc_neon_asm
# 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