Doc updates for changes in the default values of
-ffancy-math-387 and -mmath-errno.
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2020-12-20 02:59:44 +00:00
svn path=/head/; revision=181540
@ -5677,7 +5677,8 @@ math functions.
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The default is @option{-fmath-errno}.
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On Darwin systems, the math library never sets @code{errno}. There is therefore
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On Darwin and FreeBSD systems, the math library never sets @code{errno}.
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There is therefore
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no reason for the compiler to consider the possibility that it might,
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and @option{-fno-math-errno} is the default.
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@ -9507,7 +9508,7 @@ in ordinary CPU registers instead.
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@opindex mno-fancy-math-387
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Some 387 emulators do not support the @code{sin}, @code{cos} and
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@code{sqrt} instructions for the 387. Specify this option to avoid
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generating those instructions. This option is the default on FreeBSD,
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generating those instructions. This option is the default on
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OpenBSD and NetBSD@. This option is overridden when @option{-march}
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indicates that the target cpu will always have an FPU and so the
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instruction will not need emulation. As of revision 2.6.1, these
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