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x86/imdct36: use sse3 instructions in the last BUTTERF step when possible

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Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
James Almer 2014-02-27 14:40:28 -03:00 committed by Michael Niedermayer
parent fbf98375e4
commit 2163a40a46
1 changed files with 15 additions and 6 deletions
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21
libavcodec/x86/imdct36.asm
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@ -50,7 +50,7 @@ ps_cosh_sse3: dd 1.0, -0.50190991877167369479, 1.0, -5.73685662283492756461
dd 1.0, -0.51763809020504152469, 1.0, -1.93185165257813657349
dd 1.0, -0.55168895948124587824, -1.0, 1.18310079157624925896
dd 1.0, -0.61038729438072803416, -1.0, 0.87172339781054900991
dd 1.0, 0.70710678118654752439, 0.0, 0.0
dd 1.0, -0.70710678118654752439, 0.0, 0.0
costabs: times 4 dd 0.98480773
times 4 dd 0.93969262
@ -129,6 +129,19 @@ SECTION_TEXT
%endif
%endmacro
%macro BUTTERF2 3
%if cpuflag(sse3)
mulps %1, %1, [ps_cosh_sse3 + %3]
PSHUFD %2, %1, 0xe1
addsubps %1, %1, %2
%else
mulps %1, [ps_cosh + %3]
PSHUFD %2, %1, 0xe1
xorps %1, [ps_p1m1p1m1]
addps %1, %2
%endif
%endmacro
%macro STORE 4
movhlps %2, %1
movss [%3 ], %1
@ -279,11 +292,7 @@ cglobal imdct36_float, 4,4,9, out, buf, in, win
BUTTERF m7, m2, 16
BUTTERF m3, m6, 32
BUTTERF m4, m1, 48
mulps m5, m5, [ps_cosh + 64]
PSHUFD m1, m5, 0xe1
xorps m5, m5, [ps_p1m1p1m1]
addps m5, m5, m1
BUTTERF2 m5, m1, 64
; permutates:
; m0 0 1 2 3 => 2 6 10 14 m1