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fix most-negative number and _int64 on a 64-bit platform

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Closes PR 12703

Merge to 5.3
This commit is contained in:
Matthew Flatt 2012-04-14 20:01:07 -06:00
parent 2d6073f59f
commit 6566bf5d15
2 changed files with 16 additions and 1 deletions
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15
collects/tests/racket/foreign-test.rktl
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@ -10,6 +10,21 @@
(test #f malloc 0 _int)
(test #f malloc _int 0)
(let ()
(define (try-int-boundary N _int _uint)
(test (- (expt 2 N)) cast (- (expt 2 N)) _int _int)
(test (sub1 (expt 2 N)) cast (sub1 (expt 2 N)) _int _int)
(test (expt 2 N) cast (expt 2 N) _uint _uint)
(test (sub1 (expt 2 (add1 N))) cast (sub1 (expt 2 (add1 N))) _uint _uint)
(err/rt-test (cast (expt 2 N) _int _int))
(err/rt-test (cast (sub1 (- (expt 2 N))) _int _int))
(err/rt-test (cast -1 _uint _uint))
(err/rt-test (cast (- (expt 2 N)) _uint _uint)))
;(try-int-boundary 7 _int8 _uint8)
;(try-int-boundary 15 _int16 _uint16)
(try-int-boundary 31 _int32 _uint32)
(try-int-boundary 63 _int64 _uint64))
(let ([big/little (if (system-big-endian?) (lambda (x y) x) (lambda (x y) y))]
[p (malloc _int32)])
(ptr-set! p _int32 0)

2
src/racket/src/bignum.c
View File

@ -406,7 +406,7 @@ int scheme_bignum_get_long_long_val(const Scheme_Object *o, mzlonglong *v)
*v = 0;
return 1;
} else if (SCHEME_BIGDIG(o)[MAX_BN_SIZE_FOR_LL - 1] == FIRST_BIT_MASK_LL
# ifndef USE_LONG_LONG_FOR_BIGDIG
# if !defined(USE_LONG_LONG_FOR_BIGDIG) && !defined(SIXTY_FOUR_BIT_INTEGERS)
&& !SCHEME_BIGDIG(o)[0]
# endif
&& !SCHEME_BIGPOS(o)) {