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- ;*****************************************************************************
- ;* x86-optimized AC-3 DSP utils
- ;* Copyright (c) 2011 Justin Ruggles
- ;*
- ;* 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
- ;* 51, Inc., Foundation Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- ;******************************************************************************
-
- %include "x86inc.asm"
- %include "x86util.asm"
-
- SECTION .text
-
- ;-----------------------------------------------------------------------------
- ; void ff_ac3_exponent_min(uint8_t *exp, int num_reuse_blocks, int nb_coefs)
- ;-----------------------------------------------------------------------------
-
- %macro AC3_EXPONENT_MIN 1
- cglobal ac3_exponent_min_%1, 3,4,2, exp, reuse_blks, expn, offset
- shl reuse_blksq, 8
- jz .end
- LOOP_ALIGN
- .nextexp:
- mov offsetq, reuse_blksq
- mova m0, [expq+offsetq]
- sub offsetq, 256
- LOOP_ALIGN
- .nextblk:
- PMINUB m0, [expq+offsetq], m1
- sub offsetq, 256
- jae .nextblk
- mova [expq], m0
- add expq, mmsize
- sub expnq, mmsize
- jg .nextexp
- .end:
- REP_RET
- %endmacro
-
- %define PMINUB PMINUB_MMX
- %define LOOP_ALIGN
- INIT_MMX
- AC3_EXPONENT_MIN mmx
- %ifdef HAVE_MMX2
- %define PMINUB PMINUB_MMXEXT
- %define LOOP_ALIGN ALIGN 16
- AC3_EXPONENT_MIN mmxext
- %endif
- %ifdef HAVE_SSE
- INIT_XMM
- AC3_EXPONENT_MIN sse2
- %endif
- %undef PMINUB
- %undef LOOP_ALIGN
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