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66 lines
2.0 KiB
66 lines
2.0 KiB
/* |
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* Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org> |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "config.h" |
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#include "libavutil/attributes.h" |
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#include "libavutil/cpu.h" |
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#include "libavutil/mem.h" |
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#include "libavutil/ppc/cpu.h" |
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#include "libavutil/ppc/util_altivec.h" |
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#include "libavcodec/fmtconvert.h" |
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#if HAVE_ALTIVEC |
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static void int32_to_float_fmul_scalar_altivec(float *dst, const int32_t *src, |
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float mul, int len) |
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{ |
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union { |
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vector float v; |
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float s[4]; |
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} mul_u; |
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int i; |
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vector float src1, src2, dst1, dst2, mul_v, zero; |
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zero = (vector float)vec_splat_u32(0); |
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mul_u.s[0] = mul; |
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mul_v = vec_splat(mul_u.v, 0); |
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for (i = 0; i < len; i += 8) { |
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src1 = vec_ctf(vec_ld(0, src+i), 0); |
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src2 = vec_ctf(vec_ld(16, src+i), 0); |
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dst1 = vec_madd(src1, mul_v, zero); |
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dst2 = vec_madd(src2, mul_v, zero); |
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vec_st(dst1, 0, dst+i); |
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vec_st(dst2, 16, dst+i); |
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} |
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} |
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#endif /* HAVE_ALTIVEC */ |
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av_cold void ff_fmt_convert_init_ppc(FmtConvertContext *c, |
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AVCodecContext *avctx) |
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{ |
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#if HAVE_ALTIVEC |
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if (!PPC_ALTIVEC(av_get_cpu_flags())) |
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return; |
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c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_altivec; |
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#endif /* HAVE_ALTIVEC */ |
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}
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