From a2fc0f6a6ddf884ace3c96a0d4f09f0932e6db32 Mon Sep 17 00:00:00 2001 From: Måns Rullgård Date: Wed, 17 Dec 2008 00:54:54 +0000 Subject: ARM: replace "armv4l" with "arm" Originally committed as revision 16179 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/arm/dsputil_vfp.S | 189 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 189 insertions(+) create mode 100644 libavcodec/arm/dsputil_vfp.S (limited to 'libavcodec/arm/dsputil_vfp.S') diff --git a/libavcodec/arm/dsputil_vfp.S b/libavcodec/arm/dsputil_vfp.S new file mode 100644 index 0000000000..04c8014e1e --- /dev/null +++ b/libavcodec/arm/dsputil_vfp.S @@ -0,0 +1,189 @@ +/* + * Copyright (c) 2008 Siarhei Siamashka + * + * This file is part of FFmpeg. + * + * FFmpeg 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. + * + * FFmpeg 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 FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "config.h" +#include "asm.S" + + .fpu neon @ required for gas to accept UAL syntax +/* + * VFP is a floating point coprocessor used in some ARM cores. VFP11 has 1 cycle + * throughput for almost all the instructions (except for double precision + * arithmetics), but rather high latency. Latency is 4 cycles for loads and 8 cycles + * for arithmetic operations. Scheduling code to avoid pipeline stalls is very + * important for performance. One more interesting feature is that VFP has + * independent load/store and arithmetics pipelines, so it is possible to make + * them work simultaneously and get more than 1 operation per cycle. Load/store + * pipeline can process 2 single precision floating point values per cycle and + * supports bulk loads and stores for large sets of registers. Arithmetic operations + * can be done on vectors, which allows to keep the arithmetics pipeline busy, + * while the processor may issue and execute other instructions. Detailed + * optimization manuals can be found at http://www.arm.com + */ + +/** + * ARM VFP optimized implementation of 'vector_fmul_c' function. + * Assume that len is a positive number and is multiple of 8 + */ +@ void ff_vector_fmul_vfp(float *dst, const float *src, int len) +function ff_vector_fmul_vfp, export=1 + vpush {d8-d15} + mov r3, r0 + fmrx r12, fpscr + orr r12, r12, #(3 << 16) /* set vector size to 4 */ + fmxr fpscr, r12 + + vldmia r3!, {s0-s3} + vldmia r1!, {s8-s11} + vldmia r3!, {s4-s7} + vldmia r1!, {s12-s15} + vmul.f32 s8, s0, s8 +1: + subs r2, r2, #16 + vmul.f32 s12, s4, s12 + vldmiage r3!, {s16-s19} + vldmiage r1!, {s24-s27} + vldmiage r3!, {s20-s23} + vldmiage r1!, {s28-s31} + vmulge.f32 s24, s16, s24 + vstmia r0!, {s8-s11} + vstmia r0!, {s12-s15} + vmulge.f32 s28, s20, s28 + vldmiagt r3!, {s0-s3} + vldmiagt r1!, {s8-s11} + vldmiagt r3!, {s4-s7} + vldmiagt r1!, {s12-s15} + vmulge.f32 s8, s0, s8 + vstmiage r0!, {s24-s27} + vstmiage r0!, {s28-s31} + bgt 1b + + bic r12, r12, #(7 << 16) /* set vector size back to 1 */ + fmxr fpscr, r12 + vpop {d8-d15} + bx lr + .endfunc + +/** + * ARM VFP optimized implementation of 'vector_fmul_reverse_c' function. + * Assume that len is a positive number and is multiple of 8 + */ +@ void ff_vector_fmul_reverse_vfp(float *dst, const float *src0, +@ const float *src1, int len) +function ff_vector_fmul_reverse_vfp, export=1 + vpush {d8-d15} + add r2, r2, r3, lsl #2 + vldmdb r2!, {s0-s3} + vldmia r1!, {s8-s11} + vldmdb r2!, {s4-s7} + vldmia r1!, {s12-s15} + vmul.f32 s8, s3, s8 + vmul.f32 s9, s2, s9 + vmul.f32 s10, s1, s10 + vmul.f32 s11, s0, s11 +1: + subs r3, r3, #16 + vldmdbge r2!, {s16-s19} + vmul.f32 s12, s7, s12 + vldmiage r1!, {s24-s27} + vmul.f32 s13, s6, s13 + vldmdbge r2!, {s20-s23} + vmul.f32 s14, s5, s14 + vldmiage r1!, {s28-s31} + vmul.f32 s15, s4, s15 + vmulge.f32 s24, s19, s24 + vldmdbgt r2!, {s0-s3} + vmulge.f32 s25, s18, s25 + vstmia r0!, {s8-s13} + vmulge.f32 s26, s17, s26 + vldmiagt r1!, {s8-s11} + vmulge.f32 s27, s16, s27 + vmulge.f32 s28, s23, s28 + vldmdbgt r2!, {s4-s7} + vmulge.f32 s29, s22, s29 + vstmia r0!, {s14-s15} + vmulge.f32 s30, s21, s30 + vmulge.f32 s31, s20, s31 + vmulge.f32 s8, s3, s8 + vldmiagt r1!, {s12-s15} + vmulge.f32 s9, s2, s9 + vmulge.f32 s10, s1, s10 + vstmiage r0!, {s24-s27} + vmulge.f32 s11, s0, s11 + vstmiage r0!, {s28-s31} + bgt 1b + + vpop {d8-d15} + bx lr + .endfunc + +#ifdef HAVE_ARMV6 +/** + * ARM VFP optimized float to int16 conversion. + * Assume that len is a positive number and is multiple of 8, destination + * buffer is at least 4 bytes aligned (8 bytes alignment is better for + * performance), little endian byte sex + */ +@ void ff_float_to_int16_vfp(int16_t *dst, const float *src, int len) +function ff_float_to_int16_vfp, export=1 + push {r4-r8,lr} + vpush {d8-d11} + vldmia r1!, {s16-s23} + vcvt.s32.f32 s0, s16 + vcvt.s32.f32 s1, s17 + vcvt.s32.f32 s2, s18 + vcvt.s32.f32 s3, s19 + vcvt.s32.f32 s4, s20 + vcvt.s32.f32 s5, s21 + vcvt.s32.f32 s6, s22 + vcvt.s32.f32 s7, s23 +1: + subs r2, r2, #8 + vmov r3, r4, s0, s1 + vmov r5, r6, s2, s3 + vmov r7, r8, s4, s5 + vmov ip, lr, s6, s7 + vldmiagt r1!, {s16-s23} + ssat r4, #16, r4 + ssat r3, #16, r3 + ssat r6, #16, r6 + ssat r5, #16, r5 + pkhbt r3, r3, r4, lsl #16 + pkhbt r4, r5, r6, lsl #16 + vcvtgt.s32.f32 s0, s16 + vcvtgt.s32.f32 s1, s17 + vcvtgt.s32.f32 s2, s18 + vcvtgt.s32.f32 s3, s19 + vcvtgt.s32.f32 s4, s20 + vcvtgt.s32.f32 s5, s21 + vcvtgt.s32.f32 s6, s22 + vcvtgt.s32.f32 s7, s23 + ssat r8, #16, r8 + ssat r7, #16, r7 + ssat lr, #16, lr + ssat ip, #16, ip + pkhbt r5, r7, r8, lsl #16 + pkhbt r6, ip, lr, lsl #16 + stmia r0!, {r3-r6} + bgt 1b + + vpop {d8-d11} + pop {r4-r8,pc} + .endfunc +#endif -- cgit v1.2.3