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25 lines
402 B
C
25 lines
402 B
C
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#include "SDL_internal.h"
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/*
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* Written by J.T. Conklin <jtc@netbsd.org>.
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* Public domain.
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*/
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/*
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* isinff(x) returns 1 if x is inf, -1 if x is -inf, else 0;
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* no branching!
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*/
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#include "math.h"
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#include "math_private.h"
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int __isinff (float x)
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{
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int32_t ix,t;
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GET_FLOAT_WORD(ix,x);
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t = ix & 0x7fffffff;
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t ^= 0x7f800000;
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t |= -t;
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return ~(t >> 31) & (ix >> 30);
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}
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libm_hidden_def(__isinff)
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