| /* |
| * Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org> |
| * |
| * 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 "libavutil/attributes.h" |
| #include "libavutil/cpu.h" |
| #include "libavutil/mem.h" |
| #include "libavutil/ppc/cpu.h" |
| #include "libavutil/ppc/util_altivec.h" |
| #include "libavcodec/fmtconvert.h" |
| |
| #if HAVE_ALTIVEC |
| |
| static void int32_to_float_fmul_scalar_altivec(float *dst, const int32_t *src, |
| float mul, int len) |
| { |
| union { |
| vector float v; |
| float s[4]; |
| } mul_u; |
| int i; |
| vector float src1, src2, dst1, dst2, mul_v, zero; |
| |
| zero = (vector float)vec_splat_u32(0); |
| mul_u.s[0] = mul; |
| mul_v = vec_splat(mul_u.v, 0); |
| |
| for (i = 0; i < len; i += 8) { |
| src1 = vec_ctf(vec_ld(0, src+i), 0); |
| src2 = vec_ctf(vec_ld(16, src+i), 0); |
| dst1 = vec_madd(src1, mul_v, zero); |
| dst2 = vec_madd(src2, mul_v, zero); |
| vec_st(dst1, 0, dst+i); |
| vec_st(dst2, 16, dst+i); |
| } |
| } |
| |
| #endif /* HAVE_ALTIVEC */ |
| |
| av_cold void ff_fmt_convert_init_ppc(FmtConvertContext *c, |
| AVCodecContext *avctx) |
| { |
| #if HAVE_ALTIVEC |
| if (!PPC_ALTIVEC(av_get_cpu_flags())) |
| return; |
| |
| c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_altivec; |
| #endif /* HAVE_ALTIVEC */ |
| } |