4
0
mirror of git://sourceware.org/git/newlib-cygwin.git synced 2025-02-24 09:39:33 +08:00
Brian Inglis 86f9ce97bc fhandler_proc/cpuinfo: support fast short REP MOVSB
Added in Linux 5.6:
Check FSRM and use REP MOVSB for short copies on systems that have it.

>From the Intel Optimization Reference Manual:

3.7.6.1 Fast Short REP MOVSB
Beginning with processors based on Ice Lake Client microarchitecture,
REP MOVSB performance is enhanced with string lengths up to 128 bytes.
Support for fast-short REP MOVSB is indicated by the CPUID feature flag:
CPUID [EAX=7H, ECX=0H).EDX.FAST_SHORT_REP_MOVSB[bit 4] = 1.
There is no change in the REP STOS performance.
2020-02-24 11:09:41 +01:00
..
2020-02-19 13:38:42 +01:00
2016-11-24 16:09:31 +01:00
2016-06-25 00:43:01 +02:00
2019-07-25 10:45:52 +02:00
2019-10-23 10:05:42 +02:00
2019-10-23 10:05:42 +02:00
2018-02-20 17:59:53 +01:00
2015-03-03 12:58:34 +00:00
2017-03-27 22:03:58 +01:00
2015-08-17 11:05:43 +02:00
2018-04-16 22:46:11 -05:00
2018-02-07 13:07:44 +01:00
2019-06-25 15:44:43 -04:00
2019-06-25 15:44:43 -04:00
2019-07-19 14:14:33 -04:00