24 lines
525 B
C
24 lines
525 B
C
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#include <assert.h>
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#include <fenv.h>
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#include "fpu_cw.h"
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int fegetround(void)
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{
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u16_t cw;
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/* read and categorize FPUCW */
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cw = fpu_cw_get();
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switch (cw & FPUCW_ROUNDING_CONTROL)
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{
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case FPUCW_ROUNDING_CONTROL_NEAREST: return FE_TONEAREST;
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case FPUCW_ROUNDING_CONTROL_DOWN: return FE_DOWNWARD;
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case FPUCW_ROUNDING_CONTROL_UP: return FE_UPWARD;
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case FPUCW_ROUNDING_CONTROL_TRUNC: return FE_TOWARDZERO;
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}
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/* each case has been handled, otherwise the constants are wrong */
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assert(0);
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return -1;
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}
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