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| author | Mattias Andrée <m@maandree.se> | 2026-02-11 11:20:10 +0100 |
|---|---|---|
| committer | Mattias Andrée <m@maandree.se> | 2026-02-11 11:20:10 +0100 |
| commit | 0d4c3e8f6be098e953502589b17cb28197322442 (patch) | |
| tree | df3a13e786769e78d3d6201150f4018dc0c22cb5 /libj2_j2i_add_j2i.3 | |
| parent | Test sat_add (diff) | |
| download | libj2-0d4c3e8f6be098e953502589b17cb28197322442.tar.gz libj2-0d4c3e8f6be098e953502589b17cb28197322442.tar.bz2 libj2-0d4c3e8f6be098e953502589b17cb28197322442.tar.xz | |
Finish signed saturated math
Signed-off-by: Mattias Andrée <m@maandree.se>
Diffstat (limited to 'libj2_j2i_add_j2i.3')
| -rw-r--r-- | libj2_j2i_add_j2i.3 | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/libj2_j2i_add_j2i.3 b/libj2_j2i_add_j2i.3 index 8dce9ba..df0debd 100644 --- a/libj2_j2i_add_j2i.3 +++ b/libj2_j2i_add_j2i.3 @@ -39,6 +39,18 @@ int \fBlibj2_ju_add_j2u_to_j2u_overflow\fP(uintmax_t \fIa\fP, const struct libj2 int \fBlibj2_j2u_add_j2u_overflow_p\fP(const struct libj2_j2u *\fIa\fP, const struct libj2_j2u *\fIb\fP); int \fBlibj2_j2u_add_ju_overflow_p\fP(const struct libj2_j2u *\fIa\fP, uintmax_t \fIb\fP); int \fBlibj2_ju_add_j2u_overflow_p\fP(uintmax_t \fIa\fP, const struct libj2_j2u *\fIb\fP); + +void \fBlibj2_j2i_sat_add_j2i\fP(struct libj2_j2i *\fIa\fP, const struct libj2_j2i *\fIb\fP); +void \fBlibj2_j2i_sat_add_j2i_to_j2i\fP(const struct libj2_j2i *\fIa\fP, const struct libj2_j2i *\fIb\fP, struct libj2_j2i *\fIr\fP); +void \fBlibj2_j2i_sat_add_ji\fP(struct libj2_j2i *\fIa\fP, intmax_t \fIb\fP); +void \fBlibj2_j2i_sat_add_ji_to_j2i\fP(const struct libj2_j2i *\fIa\fP, intmax_t \fIb\fP, struct libj2_j2i *\fIr\fP); +void \fBlibj2_ji_sat_add_j2i_to_j2i\fP(intmax_t \fIa\fP, const struct libj2_j2i *\fIb\fP, struct libj2_j2i *\fIr\fP); + +void \fBlibj2_j2u_sat_add_j2u\fP(struct libj2_j2u *\fIa\fP, const struct libj2_j2u *\fIb\fP); +void \fBlibj2_j2u_sat_add_j2u_to_j2u\fP(const struct libj2_j2u *\fIa\fP, const struct libj2_j2u *\fIb\fP, struct libj2_j2u *\fIr\fP); +void \fBlibj2_j2u_sat_add_ju\fP(struct libj2_j2u *\fIa\fP, uintmax_t \fIb\fP); +void \fBlibj2_j2u_sat_add_ju_to_j2u\fP(const struct libj2_j2u *\fIa\fP, uintmax_t \fIb\fP, struct libj2_j2u *\fIr\fP); +void \fBlibj2_ju_sat_add_j2u_to_j2u\fP(uintmax_t \fIa\fP, const struct libj2_j2u *\fIb\fP, struct libj2_j2u *\fIr\fP); .fi .PP Link with @@ -74,7 +86,12 @@ in their name), detect arithmetic overflow. .PP The result is truncated to the least significant bits, as many as can be stored, in case of overflow; -that is, modular arithmetics is used. +that is, modular arithmetics is used. However, the +.BR sat_add -functions +use saturated arithmetics, meaning that the result +will be the maximum representable value on positive +overflow and the minimum representable value on +negative overflow. .PP The arguments are assumed to be .RI non- NULL . @@ -124,8 +141,18 @@ The .BR libj2_ji_add_j2i_to_j2i_overflow (), .BR libj2_j2i_add_j2i_overflow_p (), .BR libj2_j2i_add_ji_overflow_p (), +.BR libj2_ji_add_j2i_overflow_p (), +.BR libj2_j2i_sat_add_j2i (), +.BR libj2_j2i_sat_add_j2i_to_j2i (), +.BR libj2_j2i_sat_add_ji (), +.BR libj2_j2i_sat_add_ji_to_j2i (), +.BR libj2_ji_sat_add_j2i_to_j2i (), +.BR libj2_j2u_sat_add_j2u (), +.BR libj2_j2u_sat_add_j2u_to_j2u (), +.BR libj2_j2u_sat_add_ju (), +.BR libj2_j2u_sat_add_ju_to_j2u (), and -.BR libj2_ji_add_j2i_overflow_p () +.BR libj2_ju_sat_add_j2u_to_j2u () functions were added in version 1.1 of .BR libj2 . |