1/* 2 * Format Conversion Utils for MIPS 3 * 4 * Copyright (c) 2012 5 * MIPS Technologies, Inc., California. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the MIPS Technologies, Inc., nor the names of is 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * Author: Zoran Lukic (zoranl@mips.com) 32 * Author: Nedeljko Babic (nbabic@mips.com) 33 * 34 * This file is part of FFmpeg. 35 * 36 * FFmpeg is free software; you can redistribute it and/or 37 * modify it under the terms of the GNU Lesser General Public 38 * License as published by the Free Software Foundation; either 39 * version 2.1 of the License, or (at your option) any later version. 40 * 41 * FFmpeg is distributed in the hope that it will be useful, 42 * but WITHOUT ANY WARRANTY; without even the implied warranty of 43 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 44 * Lesser General Public License for more details. 45 * 46 * You should have received a copy of the GNU Lesser General Public 47 * License along with FFmpeg; if not, write to the Free Software 48 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 49 */ 50#include "config.h" 51#include "libavutil/attributes.h" 52#include "libavcodec/avcodec.h" 53#include "libavcodec/fmtconvert.h" 54#include "libavutil/mips/asmdefs.h" 55 56#if HAVE_INLINE_ASM 57static void int32_to_float_fmul_scalar_mips(float *dst, const int *src, 58 float mul, int len) 59{ 60 /* 61 * variables used in inline assembler 62 */ 63 float temp1, temp3, temp5, temp7, temp9, temp11, temp13, temp15; 64 65 int rpom1, rpom2, rpom11, rpom21, rpom12, rpom22, rpom13, rpom23; 66 const int *src_end = src + len; 67 /* 68 * loop is 8 times unrolled in assembler in order to achieve better performance 69 */ 70 __asm__ volatile ( 71 "i32tf_lp%=: \n\t" 72 "lw %[rpom11], 0(%[src]) \n\t" 73 "lw %[rpom21], 4(%[src]) \n\t" 74 "lw %[rpom1], 8(%[src]) \n\t" 75 "lw %[rpom2], 12(%[src]) \n\t" 76 "mtc1 %[rpom11], %[temp1] \n\t" 77 "mtc1 %[rpom21], %[temp3] \n\t" 78 "mtc1 %[rpom1], %[temp5] \n\t" 79 "mtc1 %[rpom2], %[temp7] \n\t" 80 81 "lw %[rpom13], 16(%[src]) \n\t" 82 "lw %[rpom23], 20(%[src]) \n\t" 83 "lw %[rpom12], 24(%[src]) \n\t" 84 "lw %[rpom22], 28(%[src]) \n\t" 85 "mtc1 %[rpom13], %[temp9] \n\t" 86 "mtc1 %[rpom23], %[temp11] \n\t" 87 "mtc1 %[rpom12], %[temp13] \n\t" 88 "mtc1 %[rpom22], %[temp15] \n\t" 89 90 PTR_ADDIU "%[src], 32 \n\t" 91 "cvt.s.w %[temp1], %[temp1] \n\t" 92 "cvt.s.w %[temp3], %[temp3] \n\t" 93 "cvt.s.w %[temp5], %[temp5] \n\t" 94 "cvt.s.w %[temp7], %[temp7] \n\t" 95 96 "cvt.s.w %[temp9], %[temp9] \n\t" 97 "cvt.s.w %[temp11], %[temp11] \n\t" 98 "cvt.s.w %[temp13], %[temp13] \n\t" 99 "cvt.s.w %[temp15], %[temp15] \n\t" 100 101 "mul.s %[temp1], %[temp1], %[mul] \n\t" 102 "mul.s %[temp3], %[temp3], %[mul] \n\t" 103 "mul.s %[temp5], %[temp5], %[mul] \n\t" 104 "mul.s %[temp7], %[temp7], %[mul] \n\t" 105 106 "mul.s %[temp9], %[temp9], %[mul] \n\t" 107 "mul.s %[temp11], %[temp11], %[mul] \n\t" 108 "mul.s %[temp13], %[temp13], %[mul] \n\t" 109 "mul.s %[temp15], %[temp15], %[mul] \n\t" 110 111 "swc1 %[temp1], 0(%[dst]) \n\t" /*dst[i] = src[i] * mul; */ 112 "swc1 %[temp3], 4(%[dst]) \n\t" /*dst[i+1] = src[i+1] * mul;*/ 113 "swc1 %[temp5], 8(%[dst]) \n\t" /*dst[i+2] = src[i+2] * mul;*/ 114 "swc1 %[temp7], 12(%[dst]) \n\t" /*dst[i+3] = src[i+3] * mul;*/ 115 116 "swc1 %[temp9], 16(%[dst]) \n\t" /*dst[i+4] = src[i+4] * mul;*/ 117 "swc1 %[temp11], 20(%[dst]) \n\t" /*dst[i+5] = src[i+5] * mul;*/ 118 "swc1 %[temp13], 24(%[dst]) \n\t" /*dst[i+6] = src[i+6] * mul;*/ 119 "swc1 %[temp15], 28(%[dst]) \n\t" /*dst[i+7] = src[i+7] * mul;*/ 120 PTR_ADDIU "%[dst], 32 \n\t" 121 "bne %[src], %[src_end], i32tf_lp%= \n\t" 122 : [temp1]"=&f"(temp1), [temp11]"=&f"(temp11), 123 [temp13]"=&f"(temp13), [temp15]"=&f"(temp15), 124 [temp3]"=&f"(temp3), [temp5]"=&f"(temp5), 125 [temp7]"=&f"(temp7), [temp9]"=&f"(temp9), 126 [rpom1]"=&r"(rpom1), [rpom2]"=&r"(rpom2), 127 [rpom11]"=&r"(rpom11), [rpom21]"=&r"(rpom21), 128 [rpom12]"=&r"(rpom12), [rpom22]"=&r"(rpom22), 129 [rpom13]"=&r"(rpom13), [rpom23]"=&r"(rpom23), 130 [dst]"+r"(dst), [src]"+r"(src) 131 : [mul]"f"(mul), [src_end]"r"(src_end) 132 : "memory" 133 ); 134} 135#endif /* HAVE_INLINE_ASM */ 136 137av_cold void ff_fmt_convert_init_mips(FmtConvertContext *c) 138{ 139#if HAVE_INLINE_ASM 140 c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_mips; 141#endif 142} 143