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* src/floatfns.c: Update comment.

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Paul Eggert 2022-05-10 14:47:09 -07:00
parent 203ffc6846
commit 4433df3b20
1 changed files with 14 additions and 8 deletions
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src/floatfns.c
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@ -29,14 +29,20 @@ along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
C99 and C11 require the following math.h functions in addition to
the C89 functions. Of these, Emacs currently exports only the
starred ones to Lisp, since we haven't found a use for the others:
acosh, atanh, cbrt, *copysign, erf, erfc, exp2, expm1, fdim, fma,
fmax, fmin, fpclassify, hypot, ilogb, isfinite, isgreater,
isgreaterequal, isinf, isless, islessequal, islessgreater, *isnan,
isnormal, isunordered, lgamma, log1p, *log2 [via (log X 2)], *logb
(approximately), lrint/llrint, lround/llround, nan, nearbyint,
nextafter, nexttoward, remainder, remquo, *rint, round, scalbln,
scalbn, signbit, tgamma, *trunc.
starred ones to Lisp, since we haven't found a use for the others.
Also, it uses the ones marked "+" internally:
acosh, atanh, cbrt, copysign (implemented by signbit), erf, erfc,
exp2, expm1, fdim, fma, fmax, fmin, fpclassify, hypot, +ilogb,
isfinite, isgreater, isgreaterequal, isinf, isless, islessequal,
islessgreater, *isnan, isnormal, isunordered, lgamma, log1p, *log2
[via (log X 2)], logb (approximately; implemented by frexp),
+lrint/llrint, +lround/llround, nan, nearbyint, nextafter,
nexttoward, remainder, remquo, *rint, round, scalbln, +scalbn,
+signbit, tgamma, *trunc.
The C standard also requires functions for float and long double
that are not listed above. Of these functions, Emacs uses only the
following internally: fabsf, powf, sprintf.
*/
#include <config.h>