20 lines
461 B
C
20 lines
461 B
C
#include <fenv.h>
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#include "cpu_features.h"
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/* 7.6.3.1
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The fegetround function returns the value of the rounding direction
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macro representing the current rounding direction. */
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int
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fegetround (void)
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{
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unsigned short _cw;
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__asm__ ("fnstcw %0;" : "=m" (_cw));
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/* If the MXCSR flag is different, there is no way to indicate, so just
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report the FPU flag. */
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return _cw
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& (FE_TONEAREST | FE_DOWNWARD | FE_UPWARD | FE_TOWARDZERO);
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}
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