49 lines
795 B
C
49 lines
795 B
C
#include "ref.h"
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riscv_status ref_divide_q15(q15_t numerator,
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q15_t denominator,
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q15_t *quotient,
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int16_t *shift)
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{
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int16_t sign=0;
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q31_t temp;
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int16_t shiftForNormalizing;
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*shift = 0;
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sign = (numerator>>15) ^ (denominator>>15);
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if (denominator == 0)
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{
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if (sign)
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{
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*quotient = 0x8000;
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}
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else
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{
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*quotient = 0x7FFF;
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}
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return(RISCV_MATH_NANINF);
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}
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numerator = abs(numerator);
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denominator = abs(denominator);
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temp = ((q31_t)numerator << 15) / ((q31_t)denominator);
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shiftForNormalizing= 17 - __CLZ(temp);
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if (shiftForNormalizing > 0)
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{
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*shift = shiftForNormalizing;
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temp = temp >> shiftForNormalizing;
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}
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if (sign)
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{
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temp = -temp;
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}
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*quotient=temp;
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return(RISCV_MATH_SUCCESS);
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} |