diff options
| author | Ian Romanick <[email protected]> | 2014-11-06 22:51:45 -0800 |
|---|---|---|
| committer | Kenneth Graunke <[email protected]> | 2015-01-14 17:09:50 -0800 |
| commit | 0a0d2c944372590721f5accc74d03789c1fa6098 (patch) | |
| tree | c50dc730573da5a8d689a5cbaa5139d89680e869 /src/mesa/swrast/s_alpha.c | |
| parent | ead200d156c887bed77645ecba7f36ba0be14b8c (diff) | |
mesa: Micro-optimize _mesa_is_valid_prim_mode
You would not believe the mess GCC 4.8.3 generated for the old
switch-statement.
On Bay Trail-D using Fedora 20 compile flags (-m64 -O2 -mtune=generic
for 64-bit and -m32 -march=i686 -mtune=atom for 32-bit), affects
Gl32Batch7:
32-bit: Difference at 95.0% confidence -0.37374% +/- 0.184057% (n=40)
64-bit: Difference at 95.0% confidence 0.966722% +/- 0.338442% (n=40)
The regression on 32-bit is odd. Callgrind says the caller,
_mesa_is_valid_prim_mode is faster. Before it says 2,293,760
cycles, and after it says 917,504.
Signed-off-by: Ian Romanick <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>
Diffstat (limited to 'src/mesa/swrast/s_alpha.c')
0 files changed, 0 insertions, 0 deletions