videolan/ffmpeg
1
Fork 0
mirror of https://git.videolan.org/git/ffmpeg.git synced 2024-07-28 23:08:22 +02:00
Code Releases Activity

x86: lossless audio: SSE4 madd 32bits

Browse Source 
The unique user so far is wmalossless 24bits. The few samples tested show an
order of 8, so more unrolling or an avx2 version do not make sense.

Timings: 68 -> 49 cycles

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Christophe Gisquet 2016-05-01 15:33:46 +02:00 committed by Michael Niedermayer
parent e811ebcd9c
commit 9630b3fc06
2 changed files with 40 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
libavcodec/x86/lossless_audiodsp.asm
View File

@ -68,6 +68,39 @@ SCALARPRODUCT
INIT_XMM sse2
SCALARPRODUCT
INIT_XMM sse4
; int ff_scalarproduct_and_madd_int32(int16_t *v1, int32_t *v2, int16_t *v3,
; int order, int mul)
cglobal scalarproduct_and_madd_int32, 4,4,8, v1, v2, v3, order, mul
shl orderq, 1
movd m7, mulm
SPLATW m7, m7
pxor m6, m6
add v1q, orderq
lea v2q, [v2q + 2*orderq]
add v3q, orderq
neg orderq
.loop:
mova m3, [v1q + orderq]
movu m0, [v2q + 2*orderq]
pmovsxwd m4, m3
movu m1, [v2q + 2*orderq + mmsize]
movhlps m5, m3
movu m2, [v3q + orderq]
pmovsxwd m5, m5
pmullw m2, m7
pmulld m0, m4
pmulld m1, m5
paddw m2, m3
paddd m6, m0
paddd m6, m1
mova [v1q + orderq], m2
add orderq, 16
jl .loop
HADDD m6, m0
movd eax, m6
RET
%macro SCALARPRODUCT_LOOP 1
align 16
.loop%1:

7
libavcodec/x86/lossless_audiodsp_init.c
View File

@ -31,6 +31,10 @@ int32_t ff_scalarproduct_and_madd_int16_ssse3(int16_t *v1, const int16_t *v2,
const int16_t *v3,
int order, int mul);
int32_t ff_scalarproduct_and_madd_int32_sse4(int16_t *v1, const int32_t *v2,
const int16_t *v3,
int order, int mul);
av_cold void ff_llauddsp_init_x86(LLAudDSPContext *c)
{
#if HAVE_YASM
@ -45,5 +49,8 @@ av_cold void ff_llauddsp_init_x86(LLAudDSPContext *c)
if (EXTERNAL_SSSE3(cpu_flags) &&
!(cpu_flags & (AV_CPU_FLAG_SSE42 | AV_CPU_FLAG_3DNOW))) // cachesplit
c->scalarproduct_and_madd_int16 = ff_scalarproduct_and_madd_int16_ssse3;
if (EXTERNAL_SSE4(cpu_flags))
c->scalarproduct_and_madd_int32 = ff_scalarproduct_and_madd_int32_sse4;
#endif
}