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gdb/doublest.c: Use frexpl rather than ldfrexp.
Most modern systems have frexpl and gnulib provides an implementation for those that don't, so use it instead of the generic but inaccurate ldfrexp. gdb/ChangeLog: 2013-06-21 Will Newton <will.newton@linaro.org> * doublest.c (ldfrexp): Remove function. (convert_doublest_to_floatformat): Call frexpl instead of ldfrexp.
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@ -1,3 +1,9 @@
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2013-06-21 Will Newton <will.newton@linaro.org>
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* doublest.c (ldfrexp): Remove function.
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(convert_doublest_to_floatformat): Call frexpl instead of
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ldfrexp.
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2013-06-21 Will Newton <will.newton@linaro.org>
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* gnulib/update-gnulib.sh(IMPORTED_GNULIB_MODULES): Add frexpl.
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@ -336,53 +336,6 @@ put_field (unsigned char *data, enum floatformat_byteorders order,
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}
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}
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#ifdef HAVE_LONG_DOUBLE
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/* Return the fractional part of VALUE, and put the exponent of VALUE in *EPTR.
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The range of the returned value is >= 0.5 and < 1.0. This is equivalent to
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frexp, but operates on the long double data type. */
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static long double ldfrexp (long double value, int *eptr);
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static long double
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ldfrexp (long double value, int *eptr)
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{
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long double tmp;
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int exp;
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/* Unfortunately, there are no portable functions for extracting the
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exponent of a long double, so we have to do it iteratively by
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multiplying or dividing by two until the fraction is between 0.5
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and 1.0. */
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if (value < 0.0l)
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value = -value;
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tmp = 1.0l;
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exp = 0;
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if (value >= tmp) /* Value >= 1.0 */
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while (value >= tmp)
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{
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tmp *= 2.0l;
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exp++;
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}
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else if (value != 0.0l) /* Value < 1.0 and > 0.0 */
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{
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while (value < tmp)
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{
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tmp /= 2.0l;
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exp--;
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}
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tmp *= 2.0l;
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exp++;
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}
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*eptr = exp;
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return value / tmp;
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}
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#endif /* HAVE_LONG_DOUBLE */
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/* The converse: convert the DOUBLEST *FROM to an extended float and
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store where TO points. Neither FROM nor TO have any alignment
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restrictions. */
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@ -466,7 +419,7 @@ convert_doublest_to_floatformat (CONST struct floatformat *fmt,
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}
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#ifdef HAVE_LONG_DOUBLE
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mant = ldfrexp (dfrom, &exponent);
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mant = frexpl (dfrom, &exponent);
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#else
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mant = frexp (dfrom, &exponent);
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#endif
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