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Fix (expt 3 -1) when SEXP_USE_BIGNUMS

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This commit is contained in:
Bertrand Augereau 2018-06-11 21:29:25 +02:00
parent 5f428d1299
commit ce9c60c1e8
2 changed files with 8 additions and 1 deletions
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5
eval.c
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@ -1706,6 +1706,11 @@ sexp sexp_expt_op (sexp ctx, sexp self, sexp_sint_t n, sexp x, sexp e) {
res = sexp_make_flonum(ctx, pow(10.0, 1e100)); /* +inf.0 */
} else if (sexp_bignump(x)) {
res = sexp_bignum_expt(ctx, x, e);
} else if (sexp_fixnump(x)) {
sexp_gc_preserve1(ctx, tmp);
tmp = sexp_fixnum_to_bignum(ctx, x);
res = sexp_bignum_expt(ctx, tmp, e);
sexp_gc_release1(ctx);
} else {
#endif
if (sexp_fixnump(x))

4
lib/chibi/numeric-test.sld
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@ -16,8 +16,10 @@
(define (run-tests)
(test-begin "numbers")
(test 0 (expt 0 1))
(test 1 (expt 3 0))
(test 3 (expt 3 1))
;(test 1/3 (expt 3 -1))
(test 1/3 (expt 3 -1))
(test 1/300000000000000000000 (expt 300000000000000000000 -1))
(test '(536870912 536870913 536870911 -536870912 -536870911 -536870913)