On 5/16/19 7:52 AM, Yoshinori Sato wrote: > Signed-off-by: Yoshinori Sato <ys...@users.sourceforge.jp> > Reviewed-by: Richard Henderson <richard.hender...@linaro.org> > --- > include/qemu/bitops.h | 38 ++++++++++++++++++++++++++++++++++++++ > 1 file changed, 38 insertions(+) > > diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h > index 3f0926cf40..764f9d1ea0 100644 > --- a/include/qemu/bitops.h > +++ b/include/qemu/bitops.h > @@ -301,6 +301,44 @@ static inline uint32_t extract32(uint32_t value, int > start, int length) > } > > /** > + * extract8: > + * @value: the value to extract the bit field from > + * @start: the lowest bit in the bit field (numbered from 0) > + * @length: the length of the bit field > + * > + * Extract from the 8 bit input @value the bit field specified by the > + * @start and @length parameters, and return it. The bit field must > + * lie entirely within the 8 bit word. It is valid to request that > + * all 8 bits are returned (ie @length 8 and @start 0). > + * > + * Returns: the value of the bit field extracted from the input value. > + */ > +static inline uint8_t extract8(uint8_t value, int start, int length) > +{ > + assert(start >= 0 && length > 0 && length <= 8 - start); > + return extract32(value, start, length); > +} > + > +/** > + * extract16: > + * @value: the value to extract the bit field from > + * @start: the lowest bit in the bit field (numbered from 0) > + * @length: the length of the bit field > + * > + * Extract from the 16 bit input @value the bit field specified by the > + * @start and @length parameters, and return it. The bit field must > + * lie entirely within the 16 bit word. It is valid to request that > + * all 16 bits are returned (ie @length 16 and @start 0). > + * > + * Returns: the value of the bit field extracted from the input value. > + */ > +static inline uint16_t extract16(uint16_t value, int start, int length) > +{ > + assert(start >= 0 && length > 0 && length <= 16 - start); > + return extract32(value, start, length); > +} > + > +/** > * extract64: > * @value: the value to extract the bit field from > * @start: the lowest bit in the bit field (numbered from 0) >
Reviewed-by: Philippe Mathieu-Daudé <phi...@redhat.com>