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Diffstat (limited to 'Transceiver52M/arch/arm/mult_neon.S')
| -rw-r--r-- | Transceiver52M/arch/arm/mult_neon.S | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/Transceiver52M/arch/arm/mult_neon.S b/Transceiver52M/arch/arm/mult_neon.S new file mode 100644 index 0000000..162846e --- /dev/null +++ b/Transceiver52M/arch/arm/mult_neon.S @@ -0,0 +1,42 @@ +/* + * 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 |