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- The contents of the math_fmodf.c and math_modff.c did not match the names of the respective files. In fact, the contents of these files were swapped.

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This commit is contained in:
Olaf Barthel
2015-07-24 14:08:57 +02:00
parent 34487c68b4
commit c149db9037
2 changed files with 102 additions and 102 deletions
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103
library/math_fmodf.c
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@ -1,5 +1,5 @@
/*
* $Id: math_fmodf.c,v 1.3 2006-01-08 12:04:23 obarthel Exp $
* $Id$
*
* :ts=4
*
@ -53,39 +53,82 @@
/****************************************************************************/
static const float one = 1.0;
static const float one = 1.0, Zero[] = {0.0, -0.0,};
float
modff(float x, float *iptr)
fmodf(float x, float y)
{
LONG i0,j_0;
ULONG i;
GET_FLOAT_WORD(i0,x);
j_0 = ((i0>>23)&0xff)-0x7f; /* exponent of x */
if(j_0<23) { /* integer part in x */
if(j_0<0) { /* |x|<1 */
SET_FLOAT_WORD(*iptr,i0&0x80000000U); /* *iptr = +-0 */
return x;
} else {
i = (0x007fffff)>>j_0;
if((i0&i)==0) { /* x is integral */
ULONG ix;
*iptr = x;
GET_FLOAT_WORD(ix,x);
SET_FLOAT_WORD(x,ix&0x80000000U); /* return +-0 */
return x;
} else {
SET_FLOAT_WORD(*iptr,i0&(~i));
return x - *iptr;
}
}
} else { /* no fraction part */
ULONG ix;
*iptr = x*one;
GET_FLOAT_WORD(ix,x);
SET_FLOAT_WORD(x,ix&0x80000000U); /* return +-0 */
return x;
LONG n,hx,hy,hz,ix,iy,sx,i;
GET_FLOAT_WORD(hx,x);
GET_FLOAT_WORD(hy,y);
sx = hx&0x80000000U; /* sign of x */
hx ^=sx; /* |x| */
hy &= 0x7fffffff; /* |y| */
/* purge off exception values */
if(hy==0||(hx>=0x7f800000)|| /* y=0,or x not finite */
(hy>0x7f800000)) /* or y is NaN */
return (x*y)/(x*y);
if(hx<hy) return x; /* |x|<|y| return x */
if(hx==hy)
return Zero[(ULONG)sx>>31]; /* |x|=|y| return x*0*/
/* determine ix = ilogb(x) */
if(hx<0x00800000) { /* subnormal x */
for (ix = -126,i=(hx<<8); i>0; i<<=1) ix -=1;
} else ix = (hx>>23)-127;
/* determine iy = ilogb(y) */
if(hy<0x00800000) { /* subnormal y */
for (iy = -126,i=(hy<<8); i>=0; i<<=1) iy -=1;
} else iy = (hy>>23)-127;
/* set up {hx,lx}, {hy,ly} and align y to x */
if(ix >= -126)
hx = 0x00800000|(0x007fffff&hx);
else { /* subnormal x, shift x to normal */
n = -126-ix;
hx = hx<<n;
}
if(iy >= -126)
hy = 0x00800000|(0x007fffff&hy);
else { /* subnormal y, shift y to normal */
n = -126-iy;
hy = hy<<n;
}
/* fix point fmod */
n = ix - iy;
while(n--) {
hz=hx-hy;
if(hz<0){hx = hx+hx;}
else {
if(hz==0) /* return sign(x)*0 */
return Zero[(ULONG)sx>>31];
hx = hz+hz;
}
}
hz=hx-hy;
if(hz>=0) {hx=hz;}
/* convert back to floating value and restore the sign */
if(hx==0) /* return sign(x)*0 */
return Zero[(ULONG)sx>>31];
while(hx<0x00800000) { /* normalize x */
hx = hx+hx;
iy -= 1;
}
if(iy>= -126) { /* normalize output */
hx = ((hx-0x00800000)|((iy+127)<<23));
SET_FLOAT_WORD(x,hx|sx);
} else { /* subnormal output */
n = -126 - iy;
hx >>= n;
SET_FLOAT_WORD(x,hx|sx);
x *= one; /* create necessary signal */
}
return x; /* exact output */
}
/****************************************************************************/