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Following fast-path functions are implemented (routines 4, 5 and 6 utilize
same fast-memcpy routine):
1. src_x888_8888
2. src_8888_0565
3. src_0565_8888
4. src_0565_0565
5. src_8888_8888
6. src_0888_0888
Performance numbers before/after on MIPS-74kc @ 1GHz
Referent (before):
lowlevel-blt-bench:
src_x888_8888 = L1: 199.35 L2: 96.54 M: 18.87 (100.68%) HT: 17.12 VT: 16.24 R: 15.43 RT: 9.33 ( 61Kops/s)
src_8888_0565 = L1: 71.22 L2: 51.95 M: 24.19 ( 96.17%) HT: 20.71 VT: 19.92 R: 18.15 RT: 9.92 ( 63Kops/s)
src_0565_8888 = L1: 38.82 L2: 36.22 M: 18.60 ( 73.95%) HT: 14.47 VT: 13.19 R: 12.97 RT: 6.61 ( 49Kops/s)
src_0565_0565 = L1: 286.05 L2: 155.02 M: 37.68 (100.54%) HT: 31.08 VT: 28.07 R: 26.26 RT: 11.93 ( 68Kops/s)
src_8888_8888 = L1: 454.32 L2: 139.15 M: 19.30 (102.98%) HT: 17.73 VT: 16.08 R: 16.62 RT: 10.45 ( 64Kops/s)
src_0888_0888 = L1: 190.47 L2: 106.14 M: 25.26 (101.08%) HT: 21.88 VT: 20.32 R: 18.83 RT: 10.10 ( 63Kops/s)
cairo-perf-trace:
[ # ] backend test min(s) median(s) stddev. count
[ # ] image: pixman 0.25.1
[ 0] image firefox-asteroids 421.215 421.325 0.01% 4/6
[ 1] image firefox-planet-gnome 647.708 648.486 0.13% 6/6
[ 2] image gnome-system-monitor 276.073 277.506 0.38% 6/6
[ 3] image gnome-terminal-vim 263.866 265.229 0.39% 6/6
[ 4] image poppler 123.576 124.003 0.15% 6/6
Optimized (with these optimizations):
lowlevel-blt-bench:
src_x888_8888 = L1: 369.50 L2: 99.37 M: 27.19 (145.07%) HT: 20.24 VT: 19.48 R: 19.00 RT: 10.22 ( 63Kops/s)
src_8888_0565 = L1: 105.65 L2: 67.87 M: 25.41 (101.00%) HT: 20.78 VT: 19.84 R: 18.52 RT: 9.81 ( 63Kops/s)
src_0565_8888 = L1: 77.10 L2: 63.04 M: 23.37 ( 92.90%) HT: 20.29 VT: 19.37 R: 18.14 RT: 10.02 ( 63Kops/s)
src_0565_0565 = L1: 519.02 L2: 241.32 M: 62.35 (166.34%) HT: 33.74 VT: 27.63 R: 26.12 RT: 11.70 ( 67Kops/s)
src_8888_8888 = L1: 390.48 L2: 113.99 M: 30.32 (161.77%) HT: 19.55 VT: 17.05 R: 17.13 RT: 10.19 ( 63Kops/s)
src_0888_0888 = L1: 349.74 L2: 156.68 M: 40.68 (162.78%) HT: 25.58 VT: 20.57 R: 20.20 RT: 9.96 ( 63Kops/s)
cairo-perf-trace:
[ # ] backend test min(s) median(s) stddev. count
[ # ] image: pixman 0.25.1
[ 0] image firefox-asteroids 400.050 400.308 0.04% 6/6
[ 1] image firefox-planet-gnome 628.978 629.364 0.07% 6/6
[ 2] image gnome-system-monitor 270.247 270.313 0.03% 6/6
[ 3] image gnome-terminal-vim 256.413 257.641 0.21% 6/6
[ 4] image poppler 119.540 120.023 0.21% 6/6
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