65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
#ifndef FIXMATH_H
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#define FIXMATH_H
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// Multiply two unsigned 16bit numbers and return a 32bit result
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__native unsigned long lmul16u(unsigned x, unsigned y);
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// Multiply two signed 16bit numbers and return a signed 32bit result
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__native long lmul16s(int x, int y);
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// Multiply two 12.4 fixpoint numbers and return a 12.4 fixpoint result
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inline int lmul12f4s(int x, int y);
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// Multiply two 8.8 fixpoint numbers and return an 8.8 fixpoint result
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inline int lmul8f8s(int x, int y);
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// Multiply two 4.12 fixpoint numbers and return a 12.4 fixpoint result
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__native int lmul4f12s(int x, int y);
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// Square of a 4.12 sigend fixpoint number and return an 8.24 fixpoint result
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inline unsigned long lsqr4f12s(int x);
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// Divide a 32bit unsigned number by a 16bit number and return a 16bit number
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__native unsigned ldiv16u(unsigned long x, unsigned y);
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// Divide a signed 32bit number by a signed 16bit number and return a signed 16bit number
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__native int ldiv16s(long x, int y);
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// Divide a 12.4 fixed point number by a 12.4 fixpoint number
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inline int ldiv12f4s(int x, int y);
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// Divide a 8.8 fixed point number by an 8.8 fixpoint number
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inline int ldiv8f8s(int x, int y);
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// Divide a 4.12 fixed point number by a 4.12 fixpoint number
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inline int ldiv4f12s(int x, int y);
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// Multiply two unsigned 16bit numbers and divide the result by another 16bit number a * b / c
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__native unsigned lmuldiv16u(unsigned a, unsigned b, unsigned c);
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// Multiply two signed 16bit numbers and divide the result by another signed 16bit number a * b / c
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__native int lmuldiv16s(int a, int b, int c);
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__native unsigned lmuldiv16by8(unsigned a, char b, char c);
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inline int lmuldiv16sby8(int a, char b, char c);
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__native unsigned lmuldiv8by8(char a, char b, char c);
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__native unsigned usqrt(unsigned n);
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__native unsigned long lmul16f16(unsigned long x, unsigned long y);
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__native long lmul16f16s(long x, long y);
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__native unsigned long ldiv16f16(unsigned long x, unsigned long y);
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__native long ldiv16f16s(long x, long y);
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#pragma compile("fixmath.c")
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#endif
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