diff options
| author |   Xi Ruoyao <xry111@xry111.site> | 2024-05-14 12:24:18 +0800 |
|---|---|---|
| committer |   Huacai Chen <chenhuacai@loongson.cn> | 2024-05-14 12:24:18 +0800 |
| commit | 2cce9059599143aa950b0baaf2523b17ab47d27d (patch) | |
| tree | 3b52495b349413fe801eb0e3086f9dec3df0ba81 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | Linux 6.9 (diff) | |
| download | wireguard-linux-2cce9059599143aa950b0baaf2523b17ab47d27d.tar.xz wireguard-linux-2cce9059599143aa950b0baaf2523b17ab47d27d.zip | |
LoongArch: Select ARCH_HAS_FAST_MULTIPLIER
LA464 and LA664 can do 32-bit/64-bit integer multiplication with a
latency of 4 cycles and a throughput of 2 ops per cycle. It is
comparable to the mainstream x86 and arm64 cores, so we can select
ARCH_HAS_FAST_MULTIPLIER like them.
It speeds up __sw_hweight32() in lib/hweight.c for about 14% on LA464
and 11% on LA664, while __sw_hweight64() for about 30% on LA464 and 33%
on LA664.
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions