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00a856e3f9
This is a hand-tuned version of the code with impossible parts of the FASTDIV function ommitted. 2-5% faster overall on Cortex-A8. Signed-off-by: Mans Rullgard <mans@mansr.com>
105 lines
4.0 KiB
C
105 lines
4.0 KiB
C
/*
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* Copyright (c) 2011 Mans Rullgard <mans@mansr.com>
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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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#ifndef AVCODEC_ARM_DCA_H
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#define AVCODEC_ARM_DCA_H
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#include <stdint.h>
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#include "config.h"
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#include "libavutil/intmath.h"
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#if HAVE_ARMV6 && HAVE_INLINE_ASM
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#define decode_blockcodes decode_blockcodes
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static inline int decode_blockcodes(int code1, int code2, int levels,
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int *values)
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{
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int v0, v1, v2, v3, v4, v5;
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__asm__ ("smmul %8, %14, %18 \n"
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"smmul %11, %15, %18 \n"
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"smlabb %14, %8, %17, %14 \n"
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"smlabb %15, %11, %17, %15 \n"
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"smmul %9, %8, %18 \n"
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"smmul %12, %11, %18 \n"
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"sub %14, %14, %16, lsr #1 \n"
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"sub %15, %15, %16, lsr #1 \n"
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"smlabb %8, %9, %17, %8 \n"
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"smlabb %11, %12, %17, %11 \n"
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"smmul %10, %9, %18 \n"
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"smmul %13, %12, %18 \n"
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"str %14, %0 \n"
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"str %15, %4 \n"
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"sub %8, %8, %16, lsr #1 \n"
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"sub %11, %11, %16, lsr #1 \n"
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"smlabb %9, %10, %17, %9 \n"
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"smlabb %12, %13, %17, %12 \n"
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"smmul %14, %10, %18 \n"
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"smmul %15, %13, %18 \n"
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"str %8, %1 \n"
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"str %11, %5 \n"
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"sub %9, %9, %16, lsr #1 \n"
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"sub %12, %12, %16, lsr #1 \n"
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"smlabb %10, %14, %17, %10 \n"
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"smlabb %13, %15, %17, %13 \n"
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"str %9, %2 \n"
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"str %12, %6 \n"
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"sub %10, %10, %16, lsr #1 \n"
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"sub %13, %13, %16, lsr #1 \n"
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"str %10, %3 \n"
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"str %13, %7 \n"
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: "=m"(values[0]), "=m"(values[1]),
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"=m"(values[2]), "=m"(values[3]),
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"=m"(values[4]), "=m"(values[5]),
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"=m"(values[6]), "=m"(values[7]),
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"=&r"(v0), "=&r"(v1), "=&r"(v2),
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"=&r"(v3), "=&r"(v4), "=&r"(v5),
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"+&r"(code1), "+&r"(code2)
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: "r"(levels - 1), "r"(-levels), "r"(ff_inverse[levels]));
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return code1 | code2;
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}
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#endif
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#if HAVE_NEON && HAVE_INLINE_ASM && HAVE_ASM_MOD_Y
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#define int8x8_fmul_int32 int8x8_fmul_int32
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static inline void int8x8_fmul_int32(float *dst, const int8_t *src, int scale)
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{
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__asm__ ("vcvt.f32.s32 %2, %2, #4 \n"
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"vld1.8 {d0}, [%1,:64] \n"
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"vmovl.s8 q0, d0 \n"
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"vmovl.s16 q1, d1 \n"
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"vmovl.s16 q0, d0 \n"
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"vcvt.f32.s32 q0, q0 \n"
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"vcvt.f32.s32 q1, q1 \n"
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"vmul.f32 q0, q0, %y2 \n"
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"vmul.f32 q1, q1, %y2 \n"
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"vst1.32 {q0-q1}, [%m0,:128] \n"
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: "=Um"(*(float (*)[8])dst)
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: "r"(src), "x"(scale)
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: "d0", "d1", "d2", "d3");
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}
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#endif
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#endif /* AVCODEC_ARM_DCA_H */
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