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Refactor to fix some signedness problems.

This commit is contained in:
matt 2011-08-31 22:36:36 +00:00
parent 9bf741a041
commit 5724a9e8cf
1 changed files with 5 additions and 4 deletions
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9
lib/libc/gen/fixunsgen_ieee754.c
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@ -1,4 +1,4 @@
/* $NetBSD: fixunsgen_ieee754.c,v 1.1 2011/07/09 02:30:27 matt Exp $ */
/* $NetBSD: fixunsgen_ieee754.c,v 1.2 2011/08/31 22:36:36 matt Exp $ */
/*-
* Copyright (c) 1992, 1993
@ -36,7 +36,7 @@
#include <sys/cdefs.h>
#if !defined(FIXUNSNAME) && defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: fixunsgen_ieee754.c,v 1.1 2011/07/09 02:30:27 matt Exp $");
__RCSID("$NetBSD: fixunsgen_ieee754.c,v 1.2 2011/08/31 22:36:36 matt Exp $");
#endif /* LIBC_SCCS and not lint */
#include <stddef.h>
@ -64,9 +64,10 @@ FIXUNSNAME(__fixunsgen)(int exp, bool sign, size_t mant_dig, size_t fracbits,
/*
* If it's less than 1 (negative exponent), it's going to round
* to zero. If the exponent is so large that it is a multiple of
* 2^N, then x module 2^N will be 0.
* 2^N, then x module 2^N will be 0. (we use the fact treating a
* negative value as unsigned will be greater than nonnegative value)
*/
if (__predict_false(exp < 0 || exp - mant_dig > sizeof(UINTXX_T)*8-1))
if (__predict_false((size_t)exp >= mant_dig + sizeof(UINTXX_T)*8))
return 0;
/*