Speeding up premultiply()
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Speeding up premultiply()
by Lorne Laliberte
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Hello!
Has anyone ever attempted to speed up multiplier_rgba::premultiply()? I'm wondering whether it would see any possible benefit from MMX or SSE2. (Petr, is this something that you've covered with blitjit yet?) Lorne Laliberte Senior Software Developer, Indigo Rose Software ------------------------------------------------------------------------------ _______________________________________________ Vector-agg-general mailing list Vector-agg-general@... https://lists.sourceforge.net/lists/listinfo/vector-agg-general |
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Re: Speeding up premultiply()
by Petr Kobalíček
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Hi Lorne,
for this thing you don't need BlitJit:) I wrote SSE2 code some time ago for Fog library, I think it can be easily extracted and wrapped for your needs. Look at this file (NOTE IT'S BIG): http://code.google.com/p/fog/source/browse/trunk/Fog/Fog/Graphics/Raster/Raster_SSE2.cpp (Some extracted functions are here): static FOG_INLINE void pix_expand_alpha_1x1W( __m128i& dst0, const __m128i& src0) { dst0 = _mm_shufflelo_epi16(src0, _MM_SHUFFLE(3, 3, 3, 3)); } static FOG_INLINE void pix_expand_alpha_1x2W( __m128i& dst0, const __m128i& src0) { dst0 = _mm_shufflelo_epi16(src0, _MM_SHUFFLE(3, 3, 3, 3)); dst0 = _mm_shufflehi_epi16(dst0, _MM_SHUFFLE(3, 3, 3, 3)); } static FOG_INLINE void pix_expand_alpha_2x2W( __m128i& dst0, const __m128i& src0, __m128i& dst1, const __m128i& src1) { dst0 = _mm_shufflelo_epi16(src0, _MM_SHUFFLE(3, 3, 3, 3)); dst1 = _mm_shufflelo_epi16(src1, _MM_SHUFFLE(3, 3, 3, 3)); dst0 = _mm_shufflehi_epi16(dst0, _MM_SHUFFLE(3, 3, 3, 3)); dst1 = _mm_shufflehi_epi16(dst1, _MM_SHUFFLE(3, 3, 3, 3)); } static FOG_INLINE void pix_multiply_1x1W( __m128i& dst0, const __m128i& data0, const __m128i& alpha0) { __m128i t0; t0 = _mm_mullo_epi16(data0, alpha0); t0 = _mm_adds_epu16(t0, Mask0080008000800080); dst0 = _mm_mulhi_epu16(t0, Mask0101010101010101); } static FOG_INLINE void pix_multiply_2x2W( __m128i& dst0, const __m128i& data0, const __m128i& alpha0, __m128i& dst1, const __m128i& data1, const __m128i& alpha1) { __m128i t0, t1; t0 = _mm_mullo_epi16(data0, alpha0); t1 = _mm_mullo_epi16(data1, alpha1); t0 = _mm_adds_epu16(t0, Mask0080008000800080); t1 = _mm_adds_epu16(t1, Mask0080008000800080); dst0 = _mm_mulhi_epu16(t0, Mask0101010101010101); dst1 = _mm_mulhi_epu16(t1, Mask0101010101010101); } static FOG_INLINE void pix_fill_alpha_1x1W( __m128i& dst0) { dst0 = _mm_or_si128(dst0, Mask00FF000000000000); } static FOG_INLINE void pix_fill_alpha_2x2W( __m128i& dst0, __m128i& dst1) { dst0 = _mm_or_si128(dst0, Mask00FF000000000000); dst1 = _mm_or_si128(dst1, Mask00FF000000000000); } static FOG_INLINE void pix_premultiply_1x1W( __m128i& dst0, const __m128i& src0) { __m128i alpha0; pix_expand_alpha_1x1W(alpha0, src0); pix_fill_alpha_1x1W(alpha0); pix_multiply_1x1W(dst0, src0, alpha0); } static FOG_INLINE void pix_premultiply_2x2W( __m128i& dst0, const __m128i& src0, __m128i& dst1, const __m128i& src1) { __m128i alpha0; __m128i alpha1; pix_expand_alpha_2x2W( alpha0, src0, alpha1, src1); pix_fill_alpha_2x2W( alpha0, alpha1); pix_multiply_2x2W( dst0, src0, alpha0, dst1, src1, alpha1); } The code can be simplified to one function, I'm using more functions because they are used by many other functions and blitters to make code clean. Yesterday I started blogging about Fog library so all interested people go here: http://twopixels.blogspot.com/ Cheers - Petr 2009/6/25 Lorne Laliberte <lorne@...>: > Hello! > > Has anyone ever attempted to speed up multiplier_rgba::premultiply()? > > I'm wondering whether it would see any possible benefit from MMX or SSE2. > > (Petr, is this something that you've covered with blitjit yet?) > > Lorne Laliberte > Senior Software Developer, Indigo Rose Software > > ------------------------------------------------------------------------------ > _______________________________________________ > Vector-agg-general mailing list > Vector-agg-general@... > https://lists.sourceforge.net/lists/listinfo/vector-agg-general > ------------------------------------------------------------------------------ _______________________________________________ Vector-agg-general mailing list Vector-agg-general@... https://lists.sourceforge.net/lists/listinfo/vector-agg-general |
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Re: Speeding up premultiply()
by Lorne Laliberte
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Awesome, Petr, thanks!
Lorne Laliberte Senior Software Developer, Indigo Rose Software ------------------------------------------------------------------------------ _______________________________________________ Vector-agg-general mailing list Vector-agg-general@... https://lists.sourceforge.net/lists/listinfo/vector-agg-general |
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Re: Speeding up premultiply()
by Pierre Arnaud
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Hi Lorne,
In case you produce an updated version of the premultiply code in AGG, inclding Petr's work, please share it with us :-) Pierre > -----Original Message----- > From: Lorne Laliberte [mailto:lorne@...] > Sent: Thursday, June 25, 2009 5:43 PM > To: Anti-Grain Geometry > Subject: Re: [AGG] Speeding up premultiply() > > Awesome, Petr, thanks! > > Lorne Laliberte > Senior Software Developer, Indigo Rose Software > > ----------------------------------------------------------------------- > ------- > _______________________________________________ > Vector-agg-general mailing list > Vector-agg-general@... > https://lists.sourceforge.net/lists/listinfo/vector-agg-general ------------------------------------------------------------------------------ _______________________________________________ Vector-agg-general mailing list Vector-agg-general@... https://lists.sourceforge.net/lists/listinfo/vector-agg-general |
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