On Thu, 20 Mar 2014, Ben Avison wrote:
Profiling results for overall audio decode and the mlp_filter_channel(_arm) function in particular are as follows:Before After Mean StdDev Mean StdDev Confidence Change 6:2 total 380.4 22.0 370.8 17.0 87.4% +2.6% (insignificant) 6:2 function 60.7 7.2 36.6 8.1 100.0% +65.8% 8:2 total 357.0 17.5 343.2 19.0 97.8% +4.0% (insignificant) 8:2 function 60.3 8.8 37.3 3.8 100.0% +61.8% 6:6 total 717.2 23.2 658.4 15.7 100.0% +8.9% 6:6 function 140.4 12.9 81.5 9.2 100.0% +72.4% 8:8 total 981.9 16.2 896.2 24.5 100.0% +9.6% 8:8 function 193.4 15.0 103.3 11.5 100.0% +87.2% Experiments with adding preload instructions to this function yielded no useful benefit, so these have not been included. The assembly version has also been tested with a fuzz tester to ensure that any combinations of inputs not exercised by my available test streams still generate mathematically identical results to the C version. --- libavcodec/arm/Makefile | 2 + libavcodec/arm/mlpdsp_arm.S | 433 ++++++++++++++++++++++++++++++++++++++ libavcodec/arm/mlpdsp_init_arm.c | 36 +++ libavcodec/mlpdsp.c | 2 + libavcodec/mlpdsp.h | 1 + 5 files changed, 474 insertions(+), 0 deletions(-) create mode 100644 libavcodec/arm/mlpdsp_arm.S create mode 100644 libavcodec/arm/mlpdsp_init_arm.c diff --git a/libavcodec/arm/mlpdsp_arm.S b/libavcodec/arm/mlpdsp_arm.S new file mode 100644 index 0000000..f36ba54 --- /dev/null +++ b/libavcodec/arm/mlpdsp_arm.S
+.macro loadd_ group, index0, index1, base, offset +A .if offset >= 256 +A ldr \group\index0, [\base, #\offset] +A ldr \group\index1, [\base, #(\offset) + 4] +A .else + ldrd \group\index0, \group\index1, [\base, #\offset] +A .endif +.endm
Any particular reason the .if uses 'offset' and not '\offset'? gas-preprocessor can't handle this correctly at the moment.
// Martin _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
