| /* |
| * Copyright (c) 2011 Mans Rullgard <mans@mansr.com> |
| * |
| * This file is part of Libav. |
| * |
| * Libav 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. |
| * |
| * Libav 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 Libav; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "asm.S" |
| |
| function ff_ac3_max_msb_abs_int16_neon, export=1 |
| vmov.i16 q0, #0 |
| vmov.i16 q2, #0 |
| 1: vld1.16 {q1}, [r0,:128]! |
| vabs.s16 q1, q1 |
| vld1.16 {q3}, [r0,:128]! |
| vabs.s16 q3, q3 |
| vorr q0, q0, q1 |
| vorr q2, q2, q3 |
| subs r1, r1, #16 |
| bgt 1b |
| vorr q0, q0, q2 |
| vorr d0, d0, d1 |
| vpmax.u16 d0, d0, d0 |
| vpmax.u16 d0, d0, d0 |
| vmov.u16 r0, d0[0] |
| bx lr |
| endfunc |
| |
| function ff_ac3_exponent_min_neon, export=1 |
| cmp r1, #0 |
| bxeq lr |
| push {lr} |
| mov r12, #256 |
| 1: |
| vld1.8 {q0}, [r0,:128] |
| mov lr, r1 |
| add r3, r0, #256 |
| 2: vld1.8 {q1}, [r3,:128], r12 |
| subs lr, lr, #1 |
| vmin.u8 q0, q0, q1 |
| bgt 2b |
| subs r2, r2, #16 |
| vst1.8 {q0}, [r0,:128]! |
| bgt 1b |
| pop {pc} |
| endfunc |
| |
| function ff_ac3_lshift_int16_neon, export=1 |
| vdup.16 q0, r2 |
| 1: vld1.16 {q1}, [r0,:128] |
| vshl.s16 q1, q1, q0 |
| vst1.16 {q1}, [r0,:128]! |
| subs r1, r1, #8 |
| bgt 1b |
| bx lr |
| endfunc |
| |
| function ff_ac3_rshift_int32_neon, export=1 |
| rsb r2, r2, #0 |
| vdup.32 q0, r2 |
| 1: vld1.32 {q1}, [r0,:128] |
| vshl.s32 q1, q1, q0 |
| vst1.32 {q1}, [r0,:128]! |
| subs r1, r1, #4 |
| bgt 1b |
| bx lr |
| endfunc |
| |
| function ff_float_to_fixed24_neon, export=1 |
| 1: vld1.32 {q0-q1}, [r1,:128]! |
| vcvt.s32.f32 q0, q0, #24 |
| vld1.32 {q2-q3}, [r1,:128]! |
| vcvt.s32.f32 q1, q1, #24 |
| vcvt.s32.f32 q2, q2, #24 |
| vst1.32 {q0-q1}, [r0,:128]! |
| vcvt.s32.f32 q3, q3, #24 |
| vst1.32 {q2-q3}, [r0,:128]! |
| subs r2, r2, #16 |
| bgt 1b |
| bx lr |
| endfunc |
| |
| function ff_ac3_extract_exponents_neon, export=1 |
| vmov.i32 q14, #24 |
| vmov.i32 q15, #8 |
| 1: |
| vld1.32 {q0}, [r1,:128] |
| vabs.s32 q1, q0 |
| vclz.i32 q3, q1 |
| vsub.i32 q3, q3, q15 |
| vcge.s32 q2, q3, q14 |
| vbit q3, q14, q2 |
| vbic q0, q0, q2 |
| vmovn.i32 d6, q3 |
| vmovn.i16 d6, q3 |
| vst1.32 {q0}, [r1,:128]! |
| vst1.32 {d6[0]}, [r0,:32]! |
| subs r2, r2, #4 |
| bgt 1b |
| bx lr |
| endfunc |
