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