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third_party
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github
/
STMicroelectronics
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cmsis_core.git
/
9f95ff5b6ba01db09552b84a0ab79607060a2666
/
.
/
DSP
/
DSP_Lib_TestSuite
/
RefLibs
/
src
/
FastMathFunctions
/
cos.c
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#include
"ref.h"
q31_t
ref_cos_q31
(
q31_t
x
)
{
return
(
q31_t
)(
cosf
((
float32_t
)
x
*
6.28318530717959f
/
2147483648.0f
)
*
2147483648.0f
);
}
q15_t
ref_cos_q15
(
q15_t
x
)
{
return
(
q15_t
)(
cosf
((
float32_t
)
x
*
6.28318530717959f
/
32768.0f
)
*
32768.0f
);
}