These are the test patches for switching to 7-bit bilinear
interpolation precisions. The first patch makes bilinear precision
configurable. The second patch tweaks SSE2 bilinear scaler for better
performance using PMADDWD instruction. Both should be applied after:
http://lists.freedesktop.org/archives/pixman/2012-June/002074.html
Compared to pixman-0.26.0, bilinear src_8888_8888 operation
becomes almost 1.8x faster on Core i7. The firefox-fishtank trace
gets ~30% speedup, which should help a bit with:
http://lists.freedesktop.org/archives/pixman/2012-May/001942.html
Also 7-bit bilinear interpolation precision still allows a nice SSSE3
optimization, which can be implemented later to get even more speed.
But the patches need a lot more testing on different hardware.
Siarhei Siamashka (2):
Bilinear interpolation precision is now configurable at compile time
sse2: faster bilinear scaling with 7-bit precision (use
_mm_madd_epi16)
pixman/pixman-arm-neon-asm-bilinear.S | 119 ++++++++++++------------
pixman/pixman-arm-neon-asm.S | 159 +++++++++++++++++----------------
pixman/pixman-bits-image.c | 16 ++--
pixman/pixman-inlines.h | 37 ++++++---
pixman/pixman-mips-dspr2-asm.S | 9 ++-
pixman/pixman-private.h | 8 ++
pixman/pixman-sse2.c | 42 ++++++---
test/affine-test.c | 10 ++-
test/scaling-test.c | 10 ++-
9 files changed, 236 insertions(+), 174 deletions(-)
--
1.7.3.4
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