在 2025-12-02星期二的 03:57 +0000，Yao Zi写道： > On Mon, Dec 01, 2025 at 06:49:03PM +0100, Heinrich Schuchardt wrote: > > The following functions are provided: > > > > Count leading zero bits > > > > * int __clzsi2 (unsigned int a) > > * int __clzdi2 (unsigned long a) > > * int __clzti2 (unsigned long long a) > > > > Count trailing zero bits > > > > * int __ctzsi2 (unsigned int a) > > * int __ctzdi2 (unsigned long a) > > * int __ctzti2 (unsigned long long a) > > > > Signed-off-by: Heinrich Schuchardt > > <[email protected]> > > --- > > I noted there's another series with the same subject[1] sent almost > at > the same time, and I couldn't tell the difference at the first > glance. > Is this an incident? > > > arch/Kconfig | 1 + > > arch/riscv/lib/Makefile | 2 + > > arch/riscv/lib/clz.c | 105 > > ++++++++++++++++++++++++++++++++++++++++ > > arch/riscv/lib/ctz.c | 95 ++++++++++++++++++++++++++++++++++++ > > lib/Kconfig | 2 +- > > 5 files changed, 204 insertions(+), 1 deletion(-) > > create mode 100644 arch/riscv/lib/clz.c > > create mode 100644 arch/riscv/lib/ctz.c > > > > diff --git a/arch/Kconfig b/arch/Kconfig > > index 3133f892f94..4af0da2485f 100644 > > --- a/arch/Kconfig > > +++ b/arch/Kconfig > > @@ -159,6 +159,7 @@ config PPC > > config RISCV > > bool "RISC-V architecture" > > select CREATE_ARCH_SYMLINK > > + select HAVE_PRIVATE_LIBGCC if 64BIT > > Are 32-bit platforms excluded for lacking of enough library > functions? > Should we exclude !RISCV_ISA_F || !RISCV_ISA_D platforms as well? > Though > there's no in-tree 64-bit port without F/D extension.
The S7 core in U74-MC complex seems to have only IMAC, no F/D. > > > select HAVE_SETJMP > > select HAVE_INITJMP > > select SUPPORT_ACPI > > Regards, > Yao Zi > > [1]: > https://lore.kernel.org/u-boot/[email protected]/
