Module: libav Branch: master Commit: 5a97469a4fd12ef0327292ad6062f89a5e055a62
Author: Christophe Gisquet <[email protected]> Committer: Diego Biurrun <[email protected]> Date: Tue Apr 9 21:57:07 2013 +0000 x86: sbrdsp: Implement SSE2 qmf_deint_bfly Sandybridge: 47 cycles Having a loop counter is a 7 cycle gain. Unrolling is another 7 cycle gain. Working in reverse scan is another 6 cycles. Signed-off-by: Diego Biurrun <[email protected]> --- libavcodec/x86/sbrdsp.asm | 28 ++++++++++++++++++++++++++++ libavcodec/x86/sbrdsp_init.c | 5 +++++ 2 files changed, 33 insertions(+), 0 deletions(-) diff --git a/libavcodec/x86/sbrdsp.asm b/libavcodec/x86/sbrdsp.asm index 5e54505..bfc37c2 100644 --- a/libavcodec/x86/sbrdsp.asm +++ b/libavcodec/x86/sbrdsp.asm @@ -245,3 +245,31 @@ cglobal sbr_neg_odd_64, 1,2,4,z cmp zq, r1q jne .loop REP_RET + +INIT_XMM sse2 +; sbr_qmf_deint_bfly(float *v, const float *src0, const float *src1) +cglobal sbr_qmf_deint_bfly, 3,5,8, v,src0,src1,vrev,c + mov cq, 64*4-2*mmsize + lea vrevq, [vq + 64*4] +.loop: + mova m0, [src0q+cq] + mova m1, [src1q] + mova m2, [src0q+cq+mmsize] + mova m3, [src1q+mmsize] + pshufd m4, m0, q0123 + pshufd m5, m1, q0123 + pshufd m6, m2, q0123 + pshufd m7, m3, q0123 + addps m3, m4 + subps m0, m7 + addps m1, m6 + subps m2, m5 + mova [vrevq], m1 + mova [vrevq+mmsize], m3 + mova [vq+cq], m0 + mova [vq+cq+mmsize], m2 + add src1q, 2*mmsize + add vrevq, 2*mmsize + sub cq, 2*mmsize + jge .loop + REP_RET diff --git a/libavcodec/x86/sbrdsp_init.c b/libavcodec/x86/sbrdsp_init.c index cb65a23..f3f6c65 100644 --- a/libavcodec/x86/sbrdsp_init.c +++ b/libavcodec/x86/sbrdsp_init.c @@ -34,6 +34,7 @@ void ff_sbr_hf_gen_sse(float (*X_high)[2], const float (*X_low)[2], float bw, int start, int end); void ff_sbr_neg_odd_64_sse(float *z); void ff_sbr_qmf_post_shuffle_sse(float W[32][2], const float *z); +void ff_sbr_qmf_deint_bfly_sse2(float *v, const float *src0, const float *src1); av_cold void ff_sbrdsp_init_x86(SBRDSPContext *s) { @@ -47,4 +48,8 @@ av_cold void ff_sbrdsp_init_x86(SBRDSPContext *s) s->hf_gen = ff_sbr_hf_gen_sse; s->qmf_post_shuffle = ff_sbr_qmf_post_shuffle_sse; } + + if (EXTERNAL_SSE2(mm_flags)) { + s->qmf_deint_bfly = ff_sbr_qmf_deint_bfly_sse2; + } } _______________________________________________ libav-commits mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-commits
