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-fma
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Enables automatic generation of floating-point fused multiply-add instructions.
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-fns[={no|yes}]
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(SPARC) Disables or enables the SPARC nonstandard floating-point mode.
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-fprecision=p
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x86: Sets floating-point precision mode.
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-fround=r
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Sets IEEE rounding mode in effect at startup.
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-fsimple=n
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Sets floating-point optimization preferences.
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-fstore
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x86: Forces precision of floating-point expressions.
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-ftrap=tlst
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Sets the IEEE trapping mode in effect at startup.
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-nofstore
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x86: Disables forced precision of expression.
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-xlibmieee
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Causes libm to return IEEE 754 values for math routines in exceptional
cases.
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