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x86/synth_filter: remove the main loop when it's not needed 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Christophe Gisquet 2014-04-04 14:21:40 -03:00 committed by Michael Niedermayer
parent 3aac5fcfa9
commit dfd865e51b
1 changed files with 11 additions and 0 deletions
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11
libavcodec/x86/dcadsp.asm
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@ -311,9 +311,14 @@ cglobal synth_filter_inner, 0, 6 + 4 * ARCH_X86_64, 7 + 6 * ARCH_X86_64, \
sub r5q, offmp
and r5q, -64
shl r5q, 2
%if ARCH_X86_32 || mmsize < 32
mov OFFQ, r5q
%define i r5q
mov i, 16 * 4 - (ARCH_X86_64 + 1) * mmsize ; main loop counter
%else
%define i 0
%define OFFQ r5q
%endif
%define buf2 synth_buf2q
%if ARCH_X86_32
@ -332,8 +337,10 @@ cglobal synth_filter_inner, 0, 6 + 4 * ARCH_X86_64, 7 + 6 * ARCH_X86_64, \
%define j r3q
mov win, windowm
mov ptr1, synth_bufm
%if ARCH_X86_32 || mmsize < 32
add win, i
add ptr1, i
%endif
%else ; ARCH_X86_64
%define ptr1 r6q
%define ptr2 r7q ; must be loaded
@ -349,7 +356,9 @@ cglobal synth_filter_inner, 0, 6 + 4 * ARCH_X86_64, 7 + 6 * ARCH_X86_64, \
mov ptr2, synth_bufmp
; prepare the inner loop counter
mov j, OFFQ
%if ARCH_X86_32 || mmsize < 32
sub ptr2, i
%endif
.loop1:
INNER_LOOP 0
jge .loop1
@ -394,8 +403,10 @@ cglobal synth_filter_inner, 0, 6 + 4 * ARCH_X86_64, 7 + 6 * ARCH_X86_64, \
mova [outq + i + 0 * 4 + mmsize], m7
mova [outq + i + 16 * 4 + mmsize], m8
%endif
%if ARCH_X86_32 || mmsize < 32
sub i, (ARCH_X86_64 + 1) * mmsize
jge .mainloop
%endif
RET
%endmacro