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FFmpeg/libavcodec/x86/sbrdsp.asm
Diego Biurrun 55519926ef x86: Make function prototype comments in assembly code consistent 
This helps grepping for functions, among other things.
2014-03-13 05:50:29 -07:00

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8.6 KiB
NASM
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;******************************************************************************
;* AAC Spectral Band Replication decoding functions
;* Copyright (C) 2012 Christophe Gisquet <christophe.gisquet@gmail.com>
;*
;* This file is part of Libav.
;*
;* Libav 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.
;*
;* Libav 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 Libav; if not, write to the Free Software
;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
;******************************************************************************
%include "libavutil/x86/x86util.asm"
SECTION_RODATA
; mask equivalent for multiply by -1.0 1.0
ps_mask times 2 dd 1<<31, 0
ps_mask2 times 2 dd 0, 1<<31
ps_neg times 4 dd 1<<31
SECTION_TEXT
INIT_XMM sse
cglobal sbr_sum_square, 2, 3, 6
mov r2, r1
xorps m0, m0
xorps m1, m1
sar r2, 3
jz .prepare
.loop:
movu m2, [r0 + 0]
movu m3, [r0 + 16]
movu m4, [r0 + 32]
movu m5, [r0 + 48]
mulps m2, m2
mulps m3, m3
mulps m4, m4
mulps m5, m5
addps m0, m2
addps m1, m3
addps m0, m4
addps m1, m5
add r0, 64
dec r2
jnz .loop
.prepare:
and r1, 7
sar r1, 1
jz .end
; len is a multiple of 2, thus there are at least 4 elements to process
.endloop:
movu m2, [r0]
add r0, 16
mulps m2, m2
dec r1
addps m0, m2
jnz .endloop
.end:
addps m0, m1
movhlps m2, m0
addps m0, m2
movss m1, m0
shufps m0, m0, 1
addss m0, m1
%if ARCH_X86_64 == 0
movss r0m, m0
fld dword r0m
%endif
RET
%define STEP 40*4*2
cglobal sbr_hf_g_filt, 5, 6, 5
lea r1, [r1 + 8*r4] ; offset by ixh elements into X_high
mov r5, r3
and r3, 0xFC
lea r2, [r2 + r3*4]
lea r0, [r0 + r3*8]
neg r3
jz .loop1
.loop4:
movlps m0, [r2 + 4*r3 + 0]
movlps m1, [r2 + 4*r3 + 8]
movlps m2, [r1 + 0*STEP]
movlps m3, [r1 + 2*STEP]
movhps m2, [r1 + 1*STEP]
movhps m3, [r1 + 3*STEP]
unpcklps m0, m0
unpcklps m1, m1
mulps m0, m2
mulps m1, m3
movu [r0 + 8*r3 + 0], m0
movu [r0 + 8*r3 + 16], m1
add r1, 4*STEP
add r3, 4
jnz .loop4
and r5, 3 ; number of single element loops
jz .end
.loop1: ; element 0 and 1 can be computed at the same time
movss m0, [r2]
movlps m2, [r1]
unpcklps m0, m0
mulps m2, m0
movlps [r0], m2
add r0, 8
add r2, 4
add r1, STEP
dec r5
jnz .loop1
.end:
RET
; void ff_sbr_hf_gen_sse(float (*X_high)[2], const float (*X_low)[2],
; const float alpha0[2], const float alpha1[2],
; float bw, int start, int end)
;
cglobal sbr_hf_gen, 4,4,8, X_high, X_low, alpha0, alpha1, BW, S, E
; load alpha factors
%define bw m0
%if ARCH_X86_64 == 0 || WIN64
movss bw, BWm
%endif
movlps m2, [alpha1q]
movlps m1, [alpha0q]
shufps bw, bw, 0
mulps m2, bw ; (a1[0] a1[1])*bw
mulps m1, bw ; (a0[0] a0[1])*bw = (a2 a3)
mulps m2, bw ; (a1[0] a1[1])*bw*bw = (a0 a1)
mova m3, m1
mova m4, m2
mova m7, [ps_mask]
; Set pointers
%if ARCH_X86_64 == 0 || WIN64
; start and end 6th and 7th args on stack
mov r2d, Sm
mov r3d, Em
%define start r2q
%define end r3q
%else
; BW does not actually occupy a register, so shift by 1
%define start BWq
%define end Sq
%endif
sub start, end ; neg num of loops
lea X_highq, [X_highq + end*2*4]
lea X_lowq, [X_lowq + end*2*4 - 2*2*4]
shl start, 3 ; offset from num loops
mova m0, [X_lowq + start]
movlhps m1, m1 ; (a2 a3 a2 a3)
movlhps m2, m2 ; (a0 a1 a0 a1)
shufps m3, m3, q0101 ; (a3 a2 a3 a2)
shufps m4, m4, q0101 ; (a1 a0 a1 a0)
xorps m3, m7 ; (-a3 a2 -a3 a2)
xorps m4, m7 ; (-a1 a0 -a1 a0)
.loop2:
mova m5, m0
mova m6, m0
shufps m0, m0, q2200 ; {Xl[-2][0],",Xl[-1][0],"}
shufps m5, m5, q3311 ; {Xl[-2][1],",Xl[-1][1],"}
mulps m0, m2
mulps m5, m4
mova m7, m6
addps m5, m0
mova m0, [X_lowq + start + 2*2*4]
shufps m6, m0, q0022 ; {Xl[-1][0],",Xl[0][0],"}
shufps m7, m0, q1133 ; {Xl[-1][1],",Xl[1][1],"}
mulps m6, m1
mulps m7, m3
addps m5, m6
addps m7, m0
addps m5, m7
mova [X_highq + start], m5
add start, 16
jnz .loop2
RET
cglobal sbr_sum64x5, 1,2,4,z
lea r1q, [zq+ 256]
.loop:
mova m0, [zq+ 0]
mova m2, [zq+ 16]
mova m1, [zq+ 256]
mova m3, [zq+ 272]
addps m0, [zq+ 512]
addps m2, [zq+ 528]
addps m1, [zq+ 768]
addps m3, [zq+ 784]
addps m0, [zq+1024]
addps m2, [zq+1040]
addps m0, m1
addps m2, m3
mova [zq], m0
mova [zq+16], m2
add zq, 32
cmp zq, r1q
jne .loop
REP_RET
INIT_XMM sse
cglobal sbr_qmf_post_shuffle, 2,3,4,W,z
lea r2q, [zq + (64-4)*4]
mova m3, [ps_neg]
.loop:
mova m1, [zq]
xorps m0, m3, [r2q]
shufps m0, m0, m0, q0123
unpcklps m2, m0, m1
unpckhps m0, m0, m1
mova [Wq + 0], m2
mova [Wq + 16], m0
add Wq, 32
sub r2q, 16
add zq, 16
cmp zq, r2q
jl .loop
REP_RET
INIT_XMM sse
cglobal sbr_neg_odd_64, 1,2,4,z
lea r1q, [zq+256]
.loop:
mova m0, [zq+ 0]
mova m1, [zq+16]
mova m2, [zq+32]
mova m3, [zq+48]
xorps m0, [ps_mask2]
xorps m1, [ps_mask2]
xorps m2, [ps_mask2]
xorps m3, [ps_mask2]
mova [zq+ 0], m0
mova [zq+16], m1
mova [zq+32], m2
mova [zq+48], m3
add zq, 64
cmp zq, r1q
jne .loop
REP_RET
INIT_XMM sse2
; void ff_sbr_qmf_deint_bfly_sse2(float *v, const float *src0, const float *src1)
cglobal sbr_qmf_deint_bfly, 3,5,8, v,src0,src1,vrev,c
mov cq, 64*4-2*mmsize
lea vrevq, [vq + 64*4]
.loop:
mova m0, [src0q+cq]
mova m1, [src1q]
mova m2, [src0q+cq+mmsize]
mova m3, [src1q+mmsize]
pshufd m4, m0, q0123
pshufd m5, m1, q0123
pshufd m6, m2, q0123
pshufd m7, m3, q0123
addps m3, m4
subps m0, m7
addps m1, m6
subps m2, m5
mova [vrevq], m1
mova [vrevq+mmsize], m3
mova [vq+cq], m0
mova [vq+cq+mmsize], m2
add src1q, 2*mmsize
add vrevq, 2*mmsize
sub cq, 2*mmsize
jge .loop
REP_RET
INIT_XMM sse2
cglobal sbr_qmf_pre_shuffle, 1,4,6,z
%define OFFSET (32*4-2*mmsize)
mov r3q, OFFSET
lea r1q, [zq + (32+1)*4]
lea r2q, [zq + 64*4]
mova m5, [ps_neg]
.loop:
movu m0, [r1q]
movu m2, [r1q + mmsize]
movu m1, [zq + r3q + 4 + mmsize]
movu m3, [zq + r3q + 4]
pxor m2, m5
pxor m0, m5
pshufd m2, m2, q0123
pshufd m0, m0, q0123
SBUTTERFLY dq, 2, 3, 4
SBUTTERFLY dq, 0, 1, 4
mova [r2q + 2*r3q + 0*mmsize], m2
mova [r2q + 2*r3q + 1*mmsize], m3
mova [r2q + 2*r3q + 2*mmsize], m0
mova [r2q + 2*r3q + 3*mmsize], m1
add r1q, 2*mmsize
sub r3q, 2*mmsize
jge .loop
movq m2, [zq]
movq [r2q], m2
REP_RET
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