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7c10fd3515
[BZ #13840] * sysdeps/ieee754/flt-32/e_hypotf.c (__ieee754_hypotf): Rewrite to use double-precision for the calculation instead of scaling.
54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
/* e_hypotf.c -- float version of e_hypot.c.
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* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
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*/
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#include <math.h>
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#include <math_private.h>
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float
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__ieee754_hypotf(float x, float y)
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{
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double d_x, d_y;
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int32_t ha, hb;
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GET_FLOAT_WORD(ha,x);
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ha &= 0x7fffffff;
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GET_FLOAT_WORD(hb,y);
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hb &= 0x7fffffff;
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if (ha == 0x7f800000)
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{
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if (x == y)
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return fabsf(y);
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return fabsf(x);
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}
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else if (hb == 0x7f800000)
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{
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if (x == y)
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return fabsf(x);
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return fabsf(y);
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}
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else if (ha > 0x7f800000 || hb > 0x7f800000)
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return fabsf(x) * fabsf(y);
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else if (ha == 0)
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return fabsf(y);
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else if (hb == 0)
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return fabsf(x);
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d_x = (double) x;
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d_y = (double) y;
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return (float) __ieee754_sqrt(d_x * d_x + d_y * d_y);
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}
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strong_alias (__ieee754_hypotf, __hypotf_finite)
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