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35 lines
627 B
C
35 lines
627 B
C
/* fast int primitives. min,max,abs,samesign
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*
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* WARNING: Assumes 2's complement arithmetic.
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*
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*/
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#ifndef __inline__
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#define __inline__ inline
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#endif
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static __inline__ int intmax( register int x, register int y )
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{
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return x < y ? y : x;
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}
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static __inline__ int intmin( register int x, register int y )
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{
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return x < y ? x : y;
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}
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static __inline__ int intabs( register int x )
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{
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return x < 0 ? -x : x;
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}
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#define fabsshift ((8*sizeof(unsigned int))-1)
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#define signmask(x) (((int)x)>>fabsshift)
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static __inline__ int intsamesign(int x, int y)
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{
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return (y+(signmask(x) & -(y<<1)));
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}
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#undef signmask
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#undef fabsshift
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