Mateusz Guzik 088ac3ef4b amd64: handle small memset buffers with overlapping stores ... Instead of jumping to locations which store the exact number of bytes, use displacement to move the destination. In particular the following clears an area between 8-16 (inclusive) branch-free: movq %r10,(%rdi) movq %r10,-8(%rdi,%rcx) For instance for rcx of 10 the second line is rdi + 10 - 8 = rdi + 2. Writing 8 bytes starting at that offset overlaps with 6 bytes written previously and writes 2 new, giving 10 in total. Provides a nice win for smaller stores. Other ones are erratic depending on the microarchitecture. General idea taken from NetBSD (restricted use of the trick) and bionic string functions (use for various ranges like in this patch). Reviewed by: kib (previous version) Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D17660		2018-11-16 00:44:22 +00:00
..
acpica	Rename assym.s to assym.inc	2018-03-20 17:58:51 +00:00
amd64	amd64: handle small memset buffers with overlapping stores	2018-11-16 00:44:22 +00:00
cloudabi32	Use TO_PTR() to convert integers to pointers.	2017-11-26 14:45:56 +00:00
cloudabi64	Use TO_PTR() to convert integers to pointers.	2017-11-26 14:45:56 +00:00
conf	Add ZFS to amd64 NOTES to catch future breakage of static linking	2018-11-13 23:08:46 +00:00
ia32	amd64: flush L1 data cache on syscall return with an error.	2018-10-20 23:17:24 +00:00
include	Add a custom implementation of cpu_lock_delay() for x86.	2018-11-05 22:54:03 +00:00
linux	Regenerated assorted syscall related files after:	2018-10-09 20:42:17 +00:00
linux32	Fix builds with COMPAT_LINUX32 in the kernel config.	2018-11-06 15:29:44 +00:00
pci	Do not flush cache for PCIe config window.	2018-10-18 20:49:16 +00:00
sgx	Rename assym.s to assym.inc	2018-03-20 17:58:51 +00:00
vmm	Merge cases with upper block.	2018-10-31 01:27:44 +00:00
Makefile	Bring the tags and links entries for amd64 up to date.	2015-10-27 22:59:24 +00:00