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(min_precision): Move to c-common.c

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From-SVN: r8021
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Jason Merrill 1994-09-02 23:40:51 +00:00
parent 6acfe908e3
commit 29226a190a
1 changed files with 0 additions and 31 deletions
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31
gcc/c-decl.c
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@ -5647,37 +5647,6 @@ start_enum (name)
return enumtype; return enumtype;
} }
/* Return the minimum number of bits needed to represent VALUE in a
signed or unsigned type, UNSIGNEDP says which. */
static int
min_precision (value, unsignedp)
tree value;
int unsignedp;
{
int log;
/* If the value is negative, compute its negative minus 1. The latter
adjustment is because the absolute value of the largest negative value
is one larger than the largest positive value. This is equivalent to
a bit-wise negation, so use that operation instead. */
if (tree_int_cst_sgn (value) < 0)
value = fold (build1 (BIT_NOT_EXPR, TREE_TYPE (value), value));
/* Return the number of bits needed, taking into account the fact
that we need one more bit for a signed than unsigned type. */
if (integer_zerop (value))
log = 0;
else if (TREE_INT_CST_HIGH (value) != 0)
log = HOST_BITS_PER_WIDE_INT + floor_log2 (TREE_INT_CST_HIGH (value));
else
log = floor_log2 (TREE_INT_CST_LOW (value));
return log + 1 + ! unsignedp;
}
/* After processing and defining all the values of an enumeration type, /* After processing and defining all the values of an enumeration type,
install their decls in the enumeration type and finish it off. install their decls in the enumeration type and finish it off.
ENUMTYPE is the type object and VALUES a list of decl-value pairs. ENUMTYPE is the type object and VALUES a list of decl-value pairs.