af466f3cbf
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25790 a1c6a512-1295-4272-9138-f99709370657
20 lines
531 B
C
20 lines
531 B
C
#ifndef __MATH_H_
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#define __MATH_H_
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#include <inttypes.h>
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#include <math.h>
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#include "lib/fixedpoint.h"
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#define Q_MUL(a, b, bits) (( (int64_t) (a) * (int64_t) (b) ) >> (bits))
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#define Q15_MUL(a, b) Q_MUL(a,b,15)
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#define Q16_MUL(a, b) Q_MUL(a,b,16)
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#define Q_DIV(a, b, bits) ( (((int64_t) (a)) << (bits)) / (b) )
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#define Q15_DIV(a, b) Q_DIV(a,b,15)
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#define Q16_DIV(a, b) Q_DIV(a,b,16)
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#define float_q(a, bits) (int32_t)( ((float)(a)) *(1<<(bits)))
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#define float_q15(a) float_q(a, 15)
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#define float_q16(a) float_q(a, 16)
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#endif
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