osmo-trx/Transceiver52M/arm/mult_neon.S

43 lines
1.4 KiB
ArmAsm

/*
* NEON complex multiplication
* Copyright (C) 2012,2013 Thomas Tsou <tom@tsou.cc>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
.syntax unified
.text
.align 2
.global neon_cmplx_mul_4n
.type neon_cmplx_mul_4n, %function
neon_cmplx_mul_4n:
vpush {q4-q7}
.loop_mul:
vld2.32 {q0-q1}, [r1]!
vld2.32 {q2-q3}, [r2]!
vmul.f32 q4, q0, q2
vmul.f32 q5, q1, q3
vmul.f32 q6, q0, q3
vmul.f32 q7, q2, q1
vsub.f32 q8, q4, q5
vadd.f32 q9, q6, q7
vst2.32 {q8-q9}, [r0]!
subs r3, #1
bne .loop_mul
vpop {q4-q7}
bx lr
.size neon_cmplx_mul_4n, .-neon_cmplx_mul_4n
.section .note.GNU-stack,"",%progbits