Mitchell Horne a89262079e Consistently provide ffs/fls using builtins ... Use of compiler builtin ffs/ctz functions will result in optimized instruction sequences when possible, and fall back to calling a function provided by the compiler run-time library. We have slowly shifted our platforms to take advantage of these builtins in 60645781d6 (arm64), 1c76d3a9fb (arm), 9e319462a0 (powerpc, partial). Some platforms still rely on the libkern implementations of these functions provided by libkern, namely riscv, powerpc (ffs*, flsll), and i386 (ffsll and flsll). These routines are slow, as they perform a linear search for the bit in question. Even on platforms lacking dedicated bit-search instructions, such as riscv, the compiler library will provide better-optimized routines, e.g. by using binary search. Consolidate all definitions of these functions (whether currently using builtins or not) to libkern.h. This should result in equivalent or better performing routines in all cases. One wart in all of this is the existing HAVE_INLINE_F*** macros, which we use in a few places to conditionally avoid the slow libkern routines. These aren't easily removed in one commit. For now, provide these defines unconditionally, but marked for removal after subsequent cleanup. Removal of the now unused libkern routines will follow in the next commit. Reviewed by: dougm, imp (previous version) Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D40698		2023-07-06 14:46:41 -03:00
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_align.h
_bus.h
_inttypes.h
_limits.h
_stdint.h
_types.h
acpica_machdep.h
armreg.h	Add more arm64 special register values	2023-06-12 09:31:14 +01:00
asan.h	spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD	2023-05-12 10:44:03 -06:00
asm.h
atomic.h
bus_dma_impl.h
bus_dma.h
bus.h
clock.h
cmn600_reg.h
counter.h
cpu.h	arm64: Add a masked get_kernel_reg()	2023-06-28 16:29:49 -04:00
cpufunc.h	Consistently provide ffs/fls using builtins	2023-07-06 14:46:41 -03:00
csan.h
db_machdep.h
debug_monitor.h	Make some arm64 debug monitor functions static	2023-07-05 11:05:38 +01:00
disassem.h
dump.h
efi.h
elf.h
endian.h
exec.h
float.h
floatingpoint.h
fpu.h
frame.h	arm64: Remove struct arm64_frame	2023-06-15 12:38:45 -04:00
gdb_machdep.h	spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD	2023-05-12 10:44:03 -06:00
hypervisor.h
ieeefp.h
ifunc.h
in_cksum.h
intr.h	arm: remove passing trapframe to intr_ipi_dispatch()	2023-04-26 20:08:30 +01:00
iodev.h
iommu.h
kdb.h
machdep.h
md_var.h	arm64: add swapueword8/32	2023-05-11 13:23:14 -05:00
memdev.h
metadata.h
minidump.h
ofw_machdep.h
param.h
pcb.h	Add padding for future use on arm64	2023-04-25 10:23:15 +01:00
pci_cfgreg.h
pcpu_aux.h	spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD	2023-05-12 10:44:03 -06:00
pcpu.h	Use a uint64_t to store the arm64 mpidr	2023-04-24 12:33:50 +01:00
pmap.h	pmap_{un}map_io_transient: Use bool instead of boolean_t.	2023-05-04 12:29:48 -07:00
pmc_mdep.h	hwpmc: use kstack_contains()	2023-05-06 14:49:19 -03:00
proc.h	Add padding for future use on arm64	2023-04-25 10:23:15 +01:00
procctl.h
profile.h
psl.h
pte.h	arm64 pmap: introduce PHYS_TO_PTE macro	2023-05-24 11:55:38 +01:00
ptrace.h
reg.h
reloc.h
resource.h
runq.h
setjmp.h
sf_buf.h
sigframe.h
signal.h
smp.h	smp: Dynamically allocate the stoppcbs array	2023-05-25 18:09:55 -04:00
stack.h
stdarg.h
sysarch.h
tls.h
trap.h
ucontext.h
undefined.h
vdso.h
vfp.h	Add helpers to allocate an arm64 VFP state struct	2023-07-05 10:42:14 +01:00
vm.h
vmparam.h	arm64: make VM_NFREEORDER and the comment describing it match	2023-06-29 12:48:48 -05:00