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6eda85e15b
Since the values are floats, using the float operations makes sense, improves performance on some CPUs and makes the code SSE compatible instead of needing SSE2. Based on suggestion by Jason. Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de> Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
115 lines
3.2 KiB
NASM
115 lines
3.2 KiB
NASM
;******************************************************************************
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;* AAC Spectral Band Replication decoding functions
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;* Copyright (C) 2012 Christophe Gisquet <christophe.gisquet@gmail.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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%include "x86inc.asm"
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%include "x86util.asm"
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;SECTION_RODATA
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SECTION .text
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INIT_XMM sse
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cglobal sbr_sum_square, 2, 3, 6
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mov r2, r1
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xorps m0, m0
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xorps m1, m1
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sar r2, 3
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jz .prepare
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.loop:
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movu m2, [r0 + 0]
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movu m3, [r0 + 16]
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movu m4, [r0 + 32]
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movu m5, [r0 + 48]
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mulps m2, m2
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mulps m3, m3
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mulps m4, m4
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mulps m5, m5
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addps m0, m2
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addps m1, m3
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addps m0, m4
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addps m1, m5
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add r0, 64
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dec r2
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jnz .loop
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.prepare:
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and r1, 7
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sar r1, 1
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jz .end
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; len is a multiple of 2, thus there are at least 4 elements to process
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.endloop:
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movu m2, [r0]
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add r0, 16
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mulps m2, m2
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dec r1
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addps m0, m2
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jnz .endloop
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.end:
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addps m0, m1
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movhlps m2, m0
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addps m0, m2
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movss m1, m0
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shufps m0, m0, 1
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addss m0, m1
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%if ARCH_X86_64 == 0
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movd r0m, m0
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fld dword r0m
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%endif
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RET
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%define STEP 40*4*2
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cglobal sbr_hf_g_filt, 5, 6, 5
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lea r1, [r1 + 8*r4] ; offset by ixh elements into X_high
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mov r5, r3
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and r3, 0xFC
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lea r2, [r2 + r3*4]
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lea r0, [r0 + r3*8]
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neg r3
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.loop4:
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movlps m0, [r2 + 4*r3 + 0]
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movlps m1, [r2 + 4*r3 + 8]
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movlps m2, [r1 + 0*STEP]
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movlps m3, [r1 + 2*STEP]
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movhps m2, [r1 + 1*STEP]
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movhps m3, [r1 + 3*STEP]
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unpcklps m0, m0
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unpcklps m1, m1
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mulps m0, m2
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mulps m1, m3
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movu [r0 + 8*r3 + 0], m0
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movu [r0 + 8*r3 + 16], m1
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add r1, 4*STEP
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add r3, 4
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jnz .loop4
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and r5, 3 ; number of single element loops
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jz .end
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.loop1: ; element 0 and 1 can be computed at the same time
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movss m0, [r2]
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movlps m2, [r1]
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unpcklps m0, m0
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mulps m2, m0
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movlps [r0], m2
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add r0, 8
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add r2, 4
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add r1, STEP
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dec r5
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jnz .loop1
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.end:
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RET
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