mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-01 08:27:59 +00:00
cadd2ca217
[X86] Add slow div64 tuning flag to Nehalem target (#91129) This appears to have been missed because later cpus don't inherit from Nehalem tuning much. Noticed while cleaning up for #90985 Merge commit 8b400de79eff from llvm-project (by Simon Pilgrim): [X86] Enable TuningSlowDivide64 on Barcelona/Bobcat/Bulldozer/Ryzen Families (#91277) Despite most AMD cpus having a lower latency for i64 divisions that converge early, we are still better off testing for values representable as i32 and performing a i32 division if possible. All AMD cpus appear to have been missed when we added the "idivq-to-divl" attribute - this patch now matches Intel cpu behaviour (and the x86-64/v2/3/4 levels). Unfortunately the difference in code scheduling means I've had to stop using the update_llc_test_checks script and just use old-fashioned CHECK-DAG checks for divl/divq pairs. Fixes #90985 This fixes possibly worse runtime performance on AMD Zen hardware, when using -march=znver4 (or any other znver), as opposed to -march=x86-64-v4 or the baseline -march=x86-64. A similar fix is applied for Nehalem. PR: 278908 MFC after: 3 days |
||
|---|---|---|
| .. | ||
| arm-optimized-routines | ||
| atf | ||
| bc | ||
| bearssl | ||
| bionic-x86_64-string | ||
| blocklist | ||
| bmake | ||
| bsddialog | ||
| bsnmp | ||
| byacc | ||
| bzip2 | ||
| capsicum-test | ||
| com_err | ||
| cortex-strings | ||
| dialog | ||
| diff | ||
| dma | ||
| ee | ||
| elftoolchain | ||
| expat | ||
| file | ||
| flex | ||
| gdtoa | ||
| googletest | ||
| hyperv/tools | ||
| jemalloc | ||
| kyua | ||
| ldns | ||
| ldns-host | ||
| less | ||
| lib9p | ||
| libarchive | ||
| libbegemot | ||
| libc-pwcache | ||
| libc-vis | ||
| libcbor | ||
| libcxxrt | ||
| libdiff | ||
| libdivsufsort | ||
| libedit | ||
| libevent | ||
| libexecinfo | ||
| libfido2 | ||
| libpcap | ||
| libucl | ||
| libxo | ||
| llvm-project | ||
| lua | ||
| lutok | ||
| mandoc | ||
| mknod | ||
| mtree | ||
| ncurses | ||
| netbsd-tests | ||
| netcat | ||
| ntp | ||
| nvi | ||
| ofed | ||
| one-true-awk | ||
| openbsm | ||
| opencsd/decoder | ||
| openpam | ||
| openresolv | ||
| pam_modules/pam_passwdqc | ||
| pf | ||
| pjdfstest | ||
| pnglite | ||
| pnpinfo | ||
| processor-trace | ||
| sendmail | ||
| smbfs | ||
| spleen | ||
| sqlite3 | ||
| tcp_wrappers | ||
| tcpdump | ||
| tcsh | ||
| telnet | ||
| terminus | ||
| tnftp | ||
| tzcode | ||
| tzdata | ||
| unbound | ||
| unifdef | ||
| unvis | ||
| vis | ||
| wireguard-tools | ||
| wpa | ||
| xz | ||