Mateusz Guzik 5fa12fe0cd amd64: implement strlen in assembly, take 2 ... Tested with glibc test suite. The C variant in libkern performs excessive branching to find the zero byte instead of using the bsfq instruction. The same code patched to use it is still slower than the routine implemented here as the compiler keeps neglecting to perform certain optimizations (like using leaq). On top of that the routine can be used as a starting point for copyinstr which operates on words intead of bytes. The previous attempt had an instance of swapped operands to andq when dealing with fully aligned case, which had a side effect of breaking the code for certain corner cases. Noted by jrtc27. Sample results: $(perl -e "print 'A' x 3"): stock: 211198039 patched:338626619 asm: 465609618 $(perl -e "print 'A' x 100"): stock: 83151997 patched: 98285919 asm: 120719888 Reviewed by: jhb, kib Differential Revision: https://reviews.freebsd.org/D28779		2021-02-21 00:43:05 +00:00
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acpica	amd64: clean up empty lines in .c and .h files	2020-09-01 21:16:54 +00:00
amd64	amd64: implement strlen in assembly, take 2	2021-02-21 00:43:05 +00:00
cloudabi32	Get rid of sa->narg. It serves no purpose; use sa->callp->sy_narg instead.	2020-09-27 18:47:06 +00:00
cloudabi64	Get rid of sa->narg. It serves no purpose; use sa->callp->sy_narg instead.	2020-09-27 18:47:06 +00:00
conf	amd64 GENERIC: compile in mlx5en(4)	2021-02-05 03:22:26 +02:00
ia32	Improve FPU Tag Word reconstruction on i386 to indicate register states.	2020-10-21 00:15:12 +00:00
include	amd64: use compiler intrinsics for bsf* and bsr*	2021-02-01 04:53:23 +00:00
linux	linux: Unmap the VDSO page when unloading	2021-02-16 09:40:02 -05:00
linux32	linux: Unmap the VDSO page when unloading	2021-02-16 09:40:02 -05:00
pci	pci_cfgreg.c: Use io port config access for early boot time.	2019-04-09 18:07:17 +00:00
sgx	Convert remaining cap_rights_init users to cap_rights_init_one	2021-01-12 13:16:10 +00:00
vmm	bhyve/ioapic: improve the tracking of IRR bit	2021-02-02 09:47:00 +01:00
Makefile