Messages in this thread | | | Subject | Re: [PATCH v2] MIPS: Provide Kconfig option for default IEEE 754 conformance mode | From | Zhou Yanjie <> | Date | Fri, 7 Aug 2020 23:59:16 +0800 |
| |
Hello Jiaxun,
Reviewed-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
在 2020/8/1 下午2:11, Jiaxun Yang 写道: > Requested by downstream distros, a Kconfig option for default > IEEE 754 conformance mode allows them to set their mode to > relaxed by default. > > Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> > Reviewed-by: WANG Xuerui <git@xen0n.name> > Reviewed-by: Serge Semin <fancer.lancer@gmail.com> > Reviewed-by: Huacai Chen <chenhc@lemote.com> > > -- > v2: Reword according to Xuerui's suggestion. > --- > arch/mips/Kconfig | 22 ++++++++++++++++++++++ > arch/mips/kernel/cpu-probe.c | 12 +++++++++++- > 2 files changed, 33 insertions(+), 1 deletion(-) > > diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig > index eaf7519e3033..ac35df2b9133 100644 > --- a/arch/mips/Kconfig > +++ b/arch/mips/Kconfig > @@ -2899,6 +2899,28 @@ config MIPS_NR_CPU_NR_MAP > default 1024 if MIPS_NR_CPU_NR_MAP_1024 > default NR_CPUS if !MIPS_NR_CPU_NR_MAP_1024 > > +choice > + prompt "Default IEEE 754 conformance mode" > + default IEEE754_DEFAULT_STRICT > + help > + Sets the default IEEE 754 conformance mode, same as overriding the > + default value for the ieee754= kernel parameter. See the kernel > + parameter for details. > + > + config IEEE754_DEFAULT_STRICT > + bool "Strict" > + > + config IEEE754_DEFAULT_LEGACY > + bool "Legacy" > + > + config IEEE754_DEFAULT_STD2008 > + bool "2008" > + > + config IEEE754_DEFAULT_RELAXED > + bool "Relaxed" > + > +endchoice > + > # > # Timer Interrupt Frequency Configuration > # > diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c > index c231c1b67889..a5b8fe019afc 100644 > --- a/arch/mips/kernel/cpu-probe.c > +++ b/arch/mips/kernel/cpu-probe.c > @@ -157,7 +157,17 @@ static void cpu_set_fpu_2008(struct cpuinfo_mips *c) > * IEEE 754 conformance mode to use. Affects the NaN encoding and the > * ABS.fmt/NEG.fmt execution mode. > */ > -static enum { STRICT, LEGACY, STD2008, RELAXED } ieee754 = STRICT; > +enum ieee754_mode { STRICT, LEGACY, STD2008, RELAXED }; > + > +#if defined(CONFIG_IEEE754_DEFAULT_STRICT) > +static enum ieee754_mode ieee754 = STRICT; > +#elif defined(CONFIG_IEEE754_DEFAULT_LEGACY) > +static enum ieee754_mode ieee754 = LEGACY; > +#elif defined(CONFIG_IEEE754_DEFAULT_STD2008) > +static enum ieee754_mode ieee754 = STD2008; > +#elif defined(CONFIG_IEEE754_DEFAULT_RELAXED) > +static enum ieee754_mode ieee754 = RELAXED; > +#endif > > /* > * Set the IEEE 754 NaN encodings and the ABS.fmt/NEG.fmt execution modes
| |