diff options
Diffstat (limited to 'libj2_j2u_sub_j2u.3')
| -rw-r--r-- | libj2_j2u_sub_j2u.3 | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/libj2_j2u_sub_j2u.3 b/libj2_j2u_sub_j2u.3 index cbadfd2..4ed6863 100644 --- a/libj2_j2u_sub_j2u.3 +++ b/libj2_j2u_sub_j2u.3 @@ -25,6 +25,9 @@ int \fBlibj2_j2u_sub_ju_overflow_p\fP(const struct libj2_j2u *\fIa\fP, uintmax_t int \fBlibj2_ju_sub_j2u_overflow_p\fP(uintmax_t \fIa\fP, const struct libj2_j2u *\fIb\fP); int \fBlibj2_ju_sub_ju_overflow_p\fP(uintmax_t \fIa\fP, uintmax_t \fIb\fP); +void \fBlibj2_j2u_sub_j2u_borrow\fP(struct libj2_j2u *\fIa\fP, const struct libj2_j2u *\fIb\fP, int *\fIc\fP); +void \fBlibj2_j2u_sub_j2u_to_j2u_borrow\fP(const struct libj2_j2u *\fIa\fP, const struct libj2_j2u *\fIb\fP, struct libj2_j2u *\fIr\fP, int *\fIc\fP); + void \fBlibj2_j2u_rsub_j2u\fP(struct libj2_j2u *\fIb\fP, const struct libj2_j2u *\fIa\fP); void \fBlibj2_j2u_rsub_ju\fP(struct libj2_j2u *\fIb\fP, uintmax_t \fIa\fP); @@ -34,6 +37,8 @@ int \fBlibj2_j2u_rsub_ju_overflow\fP(struct libj2_j2u *\fIb\fP, uintmax_t \fIa\f int \fBlibj2_j2u_rsub_j2u_overflow_p\fP(const struct libj2_j2u *\fIb\fP, const struct libj2_j2u *\fIa\fP); int \fBlibj2_j2u_rsub_ju_overflow_p\fP(const struct libj2_j2u *\fIb\fP, uintmax_t \fIa\fP); +void \fBlibj2_j2u_rsub_j2u_borrow\fP(struct libj2_j2u *\fIb\fP, const struct libj2_j2u *\fIa\fP, int *\fIc\fP); + void \fBlibj2_j2u_sat_sub_j2u\fP(struct libj2_j2u *\fIa\fP, const struct libj2_j2u *\fIb\fP); void \fBlibj2_j2u_sat_sub_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_sub_ju\fP(struct libj2_j2u *\fIa\fP, uintmax_t \fIb\fP); @@ -88,6 +93,18 @@ with word .B overflow in their name), detect arithmetic overflow. .PP +The +.BR libj2_j2u_sub_j2u_borrow (), +.BR libj2_j2u_sub_j2u_to_j2u_borrow (), +and +.BR libj2_j2u_rsub_j2u_borrow () +functions subtract +.IR *c , +which must be 1 or 0, +from the result, and sets +.I *c +to 1 on overflow, and 0 otherwise. +.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. However, the @@ -149,6 +166,14 @@ and .BR libj2_j2u_sat_rsub_ju () functions were added in version 1.1 of .BR libj2 . +.PP +The +.BR libj2_j2u_sub_j2u_borrow (), +.BR libj2_j2u_sub_j2u_to_j2u_borrow (), +and +.BR libj2_j2u_rsub_j2u_borrow () +functions were added in version 1.2 of +.BR libj2 . .SH NOTES The return value 1 represents negative @@ -157,6 +182,7 @@ overflow. Positive overflow is impossible. .SH SEE ALSO .BR libj2 (7), .BR libj2_j2i_sub_j2i (3), +.BR libj2_j2u_abs_diff_j2u (3), .BR libj2_j2i_add_j2i (3), .BR libj2_j2i_mul_j2i (3), .BR libj2_j2i_divmod_j2i (3) |