From a58f15343cabf4a90ff8eded8f802a5ba2f5331b Mon Sep 17 00:00:00 2001 From: Andrew Cagney Date: Mon, 15 Sep 2003 21:28:56 +0000 Subject: [PATCH] 2003-09-15 Andrew Cagney * floatformat.h (struct floatformat): Make "exp_bias" signed. --- include/ChangeLog | 4 ++++ include/floatformat.h | 8 ++++++-- 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/include/ChangeLog b/include/ChangeLog index b23b527b59a..a39d786c61e 100644 --- a/include/ChangeLog +++ b/include/ChangeLog @@ -1,3 +1,7 @@ +2003-09-15 Andrew Cagney + + * floatformat.h (struct floatformat): Make "exp_bias" signed. + 2003-09-15 Daniel Jacobowitz * floatformat.h (floatformat_is_valid): Add prototype. diff --git a/include/floatformat.h b/include/floatformat.h index feb3260117c..1d08fd6183f 100644 --- a/include/floatformat.h +++ b/include/floatformat.h @@ -61,8 +61,12 @@ struct floatformat unsigned int exp_start; unsigned int exp_len; - /* Amount added to "true" exponent. 0x3fff for many IEEE extendeds. */ - unsigned int exp_bias; + /* Bias added to a "true" exponent to form the biased exponent. It + is intentionally signed as, otherwize, -exp_bias can turn into a + very large number (e.g., given the exp_bias of 0x3fff and a 64 + bit long, the equation (long)(1 - exp_bias) evaluates to + 4294950914) instead of -16382). */ + int exp_bias; /* Exponent value which indicates NaN. This is the actual value stored in the float, not adjusted by the exp_bias. This usually consists of all one bits. */ -- 2.30.2