| Message ID | 20200225124710.14152-14-alex.bennee@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | testing & plugin updates | expand |
On 2/25/20 1:47 PM, Alex Bennée wrote: > From: Yoshinori Sato <ysato@users.sourceforge.jp> > > Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> > Reviewed-by: Richard Henderson <richard.henderson@linaro.org> > Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> > Message-Id: <20190607091116.49044-10-ysato@users.sourceforge.jp> ^ This tag can go. > Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> > Signed-off-by: Richard Henderson <richard.henderson@linaro.org> > Signed-off-by: Alex Bennée <alex.bennee@linaro.org> > Message-Id: <20200212130311.127515-3-ysato@users.sourceforge.jp> > --- > include/qemu/bitops.h | 38 ++++++++++++++++++++++++++++++++++++++ > 1 file changed, 38 insertions(+) > > diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h > index 02c1ce6a5d4..f55ce8b320b 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) > return (value >> start) & (~0U >> (32 - 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 >
diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h index 02c1ce6a5d4..f55ce8b320b 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) return (value >> start) & (~0U >> (32 - 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