Hi,
2014-08-20 4:55 GMT+02:00 James Almer <jamr...@gmail.com>:
> ~15% faster than sse2
[...]
> @@ -509,7 +509,11 @@ void ff_hevc_dsp_init_x86(HEVCDSPContext *c, const int
> bit_depth)
> if (ARCH_X86_64) {
> c->hevc_v_loop_filter_luma =
> ff_hevc_v_loop_filter_luma_8_avx;
> c->hevc_h_loop_filter_luma =
> ff_hevc_h_loop_filter_luma_8_avx;
> +
> + c->transform_add[2] = ff_hevc_transform_add16_8_avx;
> + c->transform_add[3] = ff_hevc_transform_add32_8_avx;
Does avx => ARCH_X86_64 (didn't know) ? Otherwise the reg count seems
fine, meaning the condition is unneeded.
> }
> + c->transform_add[1] = ff_hevc_transform_add8_8_avx;
I'm not entirely sure, but this is instantiated through INIT_YMM avx2,
and I wouldn't expect performance improvement past the 3-op-form?
So couldn't this one be instantiated to use xmm regs? (mmx may be a
burden eg need for emms and need to rewrite it).
--
Christophe
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