[PATCH 0/1] LoongArch: Add optimized functions.

[dengjianbo]

Tested on LoongArch machine 3A5000: gcc 12.1.0, Linux kernel 5.19.0 rc5, binutils 2.38.50, All cases are passed besides ifunc related tests, no new failed entry was introduced.

configure:
../configure  --prefix=/usr CFLAGS="-O2"

make bench:
comparing with improved generic string version resent in https://sourceware.org/pipermail/libc-alpha/2022-September/141833.html , test results can be found in following link:
https://github.com/jiadengx/glibc/tree/main/make_bench_v2

strchr
 About 30% faster than improved generic version, detailed info can be found from strchr_xls.png and graph-strchr.
https://github.com/jiadengx/glibc/blob/main/make_bench_v2/graph-strchr
https://github.com/jiadengx/glibc/blob/main/make_bench_v2/strchr_xls.png

strchrnul
 About 30% faster than improved generic version, detailed info can be found from strchrnul_xls.png and graph-strchrnul.
https://github.com/jiadengx/glibc/blob/main/make_bench_v2/graph-strchrnul
https://github.com/jiadengx/glibc/blob/main/make_bench_v2/strchrnul_xls.png

strcmp
 About 10% - 60% faster than improved generic version, detailed info can be found from strcmp_xls.png and graph-strcmp.
https://github.com/jiadengx/glibc/blob/main/make_bench_v2/graph-strcmp
https://github.com/jiadengx/glibc/blob/main/make_bench_v2/strcmp_xls.png

strncmp
 About 0% - 80% faster than generic version, detailed info can be found from strncmp_xls.png and graph-strncmp.
https://github.com/jiadengx/glibc/blob/main/make_bench_v2/graph-strncmp
https://github.com/jiadengx/glibc/blob/main/make_bench_v2/strncmp_xls.png

memmove
 About 5% - 60% faster than improved generic version, detailed info can be found from memmove_xls.png and graph-memmove
https://github.com/jiadengx/glibc/blob/main/make_bench_v2/graph-memmove
https://github.com/jiadengx/glibc/blob/main/make_bench_v2/memmove_xls.png


dengjianbo (1):
  LoongArch: Add optimized functions

 sysdeps/loongarch/lp64/memmove.S   | 485 +++++++++++++++++++++++++++++
 sysdeps/loongarch/lp64/strchr.S    | 124 ++++++++
 sysdeps/loongarch/lp64/strchrnul.S | 133 ++++++++
 sysdeps/loongarch/lp64/strcmp.S    | 207 ++++++++++++
 sysdeps/loongarch/lp64/strncmp.S   | 278 +++++++++++++++++
 5 files changed, 1227 insertions(+)
 create mode 100644 sysdeps/loongarch/lp64/memmove.S
 create mode 100644 sysdeps/loongarch/lp64/strchr.S
 create mode 100644 sysdeps/loongarch/lp64/strchrnul.S
 create mode 100644 sysdeps/loongarch/lp64/strcmp.S
 create mode 100644 sysdeps/loongarch/lp64/strncmp.S

-- 
2.31.1