diff options
| author | Siarhei Siamashka <siarhei.siamashka@gmail.com> | 2012-12-03 17:42:21 +0200 |
|---|---|---|
| committer | Siarhei Siamashka <siarhei.siamashka@gmail.com> | 2013-01-27 20:48:31 +0200 |
| commit | a47ed2c31180e6c3b332747a1721731e0649b10f (patch) | |
| tree | df7a10d3b9ad9e0facb0e2efb5d5200a79e23adc /pixman/pixman-matrix.c | |
| parent | e66fd5ccb6b69dfa1acde36220dc3c3c44026890 (diff) | |
Faster fetch for the C variant of r5g6b5 src/dest iterator
Processing two pixels at once is used to reduce the number of
arithmetic operations.
The speedup relative to the generic fetch_scanline_r5g6b5() from
"pixman-access.c" (pixman was compiled with gcc 4.7.2):
MIPS 74K 480MHz : 20.32 MPix/s -> 26.47 MPix/s
ARM11 700MHz : 34.95 MPix/s -> 38.22 MPix/s
ARM Cortex-A8 1000MHz : 87.44 MPix/s -> 100.92 MPix/s
ARM Cortex-A9 1700MHz : 150.95 MPix/s -> 158.13 MPix/s
ARM Cortex-A15 1700MHz : 148.91 MPix/s -> 155.42 MPix/s
IBM Cell PPU 3200MHz : 75.29 MPix/s -> 98.33 MPix/s
Intel Core i7 2800MHz : 257.02 MPix/s -> 376.93 MPix/s
That's the performance for C code (SIMD and assembly optimizations
are disabled via PIXMAN_DISABLE environment variable).
Diffstat (limited to 'pixman/pixman-matrix.c')
0 files changed, 0 insertions, 0 deletions