#include <sys/cdefs.h>
#if defined(LIBM_SCCS) && !defined(lint)
__RCSID("$NetBSD: e_hypotf.c,v 1.7 1999/07/02 15:37:39 simonb Exp $");
#endif
#include "math.h"
#include "math_private.h"
#define __ieee754_sqrtf sqrtf
float hypotf(float x, float y)
{
float a=x,b=y,t1,t2,y1,y2,w;
int32_t j,k,ha,hb;
GET_FLOAT_WORD(ha,x);
ha &= 0x7fffffff;
GET_FLOAT_WORD(hb,y);
hb &= 0x7fffffff;
if(hb > ha) {a=y;b=x;j=ha; ha=hb;hb=j;} else {a=x;b=y;}
SET_FLOAT_WORD(a,ha);
SET_FLOAT_WORD(b,hb);
if((ha-hb)>0xf000000) {return a+b;}
k=0;
if(ha > 0x58800000) {
if(ha >= 0x7f800000) {
w = a+b;
if(ha == 0x7f800000) w = a;
if(hb == 0x7f800000) w = b;
return w;
}
ha -= 0x5d800000; hb -= 0x5d800000; k += 60;
SET_FLOAT_WORD(a,ha);
SET_FLOAT_WORD(b,hb);
}
if(hb < 0x26800000) {
if(hb <= 0x007fffff) {
if(hb==0) return a;
SET_FLOAT_WORD(t1,0x3f000000);
b *= t1;
a *= t1;
k -= 126;
} else {
ha += 0x5d800000;
hb += 0x5d800000;
k -= 60;
SET_FLOAT_WORD(a,ha);
SET_FLOAT_WORD(b,hb);
}
}
w = a-b;
if (w>b) {
SET_FLOAT_WORD(t1,ha&0xfffff000);
t2 = a-t1;
w = __ieee754_sqrtf(t1*t1-(b*(-b)-t2*(a+t1)));
} else {
a = a+a;
SET_FLOAT_WORD(y1,hb&0xfffff000);
y2 = b - y1;
SET_FLOAT_WORD(t1,ha+0x00800000);
t2 = a - t1;
w = __ieee754_sqrtf(t1*y1-(w*(-w)-(t1*y2+t2*b)));
}
if(k!=0) {
SET_FLOAT_WORD(t1,0x3f800000+(k<<23));
return t1*w;
} else return w;
}