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x86util: Document SBUTTERFLY macro

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Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
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Alexandra Hájková 2016-09-10 20:41:43 +02:00 committed by Luca Barbato
parent de64dd13cb
commit 07e1f99a1b
1 changed files with 10 additions and 0 deletions
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libavutil/x86/x86util.asm
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@ -29,6 +29,16 @@
%include "libavutil/x86/x86inc.asm"
; Interleave low src0 with low src1 and store in src0,
; interleave high src0 with high src1 and store in src1.
; %1 - types
; %2 - index of the register with src0
; %3 - index of the register with src1
; %4 - index of the register for intermediate results
; example for %1 - wd: input: src0: x0 x1 x2 x3 z0 z1 z2 z3
; src1: y0 y1 y2 y3 q0 q1 q2 q3
; output: src0: x0 y0 x1 y1 x2 y2 x3 y3
; src1: z0 q0 z1 q1 z2 q2 z3 q3
%macro SBUTTERFLY 4
%if avx_enabled == 0
mova m%4, m%2