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x86: float dsp: unroll SSE versions 

vector_fmul and vector_fmac_scalar are guaranteed that they can process in
batch of 16 elements, but their SSE versions only does 8 at a time.

Therefore, unroll them a bit.
299 to 261c for 256 elements in vector_fmac_scalar on Arrandale/Win64.

Signed-off-by: Janne Grunau <janne-libav@jannau.net>
This commit is contained in:
Christophe Gisquet 2014-02-14 15:03:12 +00:00 committed by Janne Grunau
parent ef010f08ae
commit 996697e266
1 changed files with 24 additions and 16 deletions
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40
libavutil/x86/float_dsp.asm
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@ -27,17 +27,21 @@ SECTION .text
;-----------------------------------------------------------------------------
%macro VECTOR_FMUL 0
cglobal vector_fmul, 4,4,2, dst, src0, src1, len
lea lenq, [lend*4 - 2*mmsize]
lea lenq, [lend*4 - 64]
ALIGN 16
.loop:
mova m0, [src0q + lenq]
mova m1, [src0q + lenq + mmsize]
mulps m0, m0, [src1q + lenq]
mulps m1, m1, [src1q + lenq + mmsize]
mova [dstq + lenq], m0
mova [dstq + lenq + mmsize], m1
%assign a 0
%rep 32/mmsize
mova m0, [src0q + lenq + (a+0)*mmsize]
mova m1, [src0q + lenq + (a+1)*mmsize]
mulps m0, m0, [src1q + lenq + (a+0)*mmsize]
mulps m1, m1, [src1q + lenq + (a+1)*mmsize]
mova [dstq + lenq + (a+0)*mmsize], m0
mova [dstq + lenq + (a+1)*mmsize], m1
%assign a a+2
%endrep
sub lenq, 2*mmsize
sub lenq, 64
jge .loop
REP_RET
%endmacro
@ -68,15 +72,19 @@ cglobal vector_fmac_scalar, 4,4,3, dst, src, mul, len
vinsertf128 m0, m0, xmm0, 1
%endif
%endif
lea lenq, [lend*4-2*mmsize]
lea lenq, [lend*4-64]
.loop:
mulps m1, m0, [srcq+lenq ]
mulps m2, m0, [srcq+lenq+mmsize]
addps m1, m1, [dstq+lenq ]
addps m2, m2, [dstq+lenq+mmsize]
mova [dstq+lenq ], m1
mova [dstq+lenq+mmsize], m2
sub lenq, 2*mmsize
%assign a 0
%rep 32/mmsize
mulps m1, m0, [srcq+lenq+(a+0)*mmsize]
mulps m2, m0, [srcq+lenq+(a+1)*mmsize]
addps m1, m1, [dstq+lenq+(a+0)*mmsize]
addps m2, m2, [dstq+lenq+(a+1)*mmsize]
mova [dstq+lenq+(a+0)*mmsize], m1
mova [dstq+lenq+(a+1)*mmsize], m2
%assign a a+2
%endrep
sub lenq, 64
jge .loop
REP_RET
%endmacro