28 lines
759 B
C
28 lines
759 B
C
#include <fenv.h>
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#include "cpu_features.h"
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/* 7.6.2.5
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The fetestexcept function determines which of a specified subset of
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the exception flags are currently set. The excepts argument
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specifies the exception flags to be queried.
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The fetestexcept function returns the value of the bitwise OR of the
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exception macros corresponding to the currently set exceptions
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included in excepts. */
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int fetestexcept (int excepts)
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{
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unsigned int _res;
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__asm__ ("fnstsw %%ax" : "=a" (_res));
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/* If SSE supported, return the union of the FPU and SSE flags. */
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if (__HAS_SSE)
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{
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unsigned int _csr;
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__asm__ volatile("stmxcsr %0" : "=m" (_csr));
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_res |= _csr;
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}
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return (_res & excepts & FE_ALL_EXCEPT);
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}
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