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180 lines
5.2 KiB
180 lines
5.2 KiB
;****************************************************************************** |
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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 "libavutil/x86/x86util.asm" |
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SECTION_RODATA |
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; mask equivalent for multiply by -1.0 1.0 |
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ps_mask times 2 dd 1<<31, 0 |
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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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movss 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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jz .loop1 |
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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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; static void sbr_hf_gen_c(float (*X_high)[2], const float (*X_low)[2], |
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; const float alpha0[2], const float alpha1[2], |
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; float bw, int start, int end) |
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; |
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cglobal sbr_hf_gen, 4,4,8, X_high, X_low, alpha0, alpha1, BW, S, E |
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; load alpha factors |
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%define bw m0 |
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%if ARCH_X86_64 == 0 || WIN64 |
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movss bw, BWm |
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%endif |
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movlps m2, [alpha1q] |
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movlps m1, [alpha0q] |
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shufps bw, bw, 0 |
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mulps m2, bw ; (a1[0] a1[1])*bw |
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mulps m1, bw ; (a0[0] a0[1])*bw = (a2 a3) |
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mulps m2, bw ; (a1[0] a1[1])*bw*bw = (a0 a1) |
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mova m3, m1 |
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mova m4, m2 |
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; Set pointers |
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%if ARCH_X86_64 == 0 || WIN64 |
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; start and end 6th and 7th args on stack |
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mov r2d, Sm |
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mov r3d, Em |
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%define start r2q |
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%define end r3q |
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%else |
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; BW does not actually occupy a register, so shift by 1 |
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%define start BWq |
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%define end Sq |
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%endif |
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sub start, end ; neg num of loops |
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lea X_highq, [X_highq + end*2*4] |
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lea X_lowq, [X_lowq + end*2*4 - 2*2*4] |
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shl start, 3 ; offset from num loops |
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mova m0, [X_lowq + start] |
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shufps m3, m3, q1111 |
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shufps m4, m4, q1111 |
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xorps m3, [ps_mask] |
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shufps m1, m1, q0000 |
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shufps m2, m2, q0000 |
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xorps m4, [ps_mask] |
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.loop2: |
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movu m7, [X_lowq + start + 8] ; BbCc |
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mova m6, m0 |
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mova m5, m7 |
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shufps m0, m0, q2301 ; aAbB |
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shufps m7, m7, q2301 ; bBcC |
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mulps m0, m4 |
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mulps m7, m3 |
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mulps m6, m2 |
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mulps m5, m1 |
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addps m7, m0 |
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mova m0, [X_lowq + start +16] ; CcDd |
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addps m7, m0 |
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addps m6, m5 |
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addps m7, m6 |
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mova [X_highq + start], m7 |
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add start, 16 |
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jnz .loop2 |
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RET
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